./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/mix038.opt.i --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --validate ./goblint.2024-06-19_11-23-25.files/protection/mix038.opt.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 7724a2de Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReachWitnessValidation.xml -i ../../../trunk/examples/svcomp/pthread-wmm/mix038.opt.i ./goblint.2024-06-19_11-23-25.files/protection/mix038.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-7724a2d-m [2024-06-27 20:26:16,589 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-27 20:26:16,638 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-27 20:26:16,641 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-27 20:26:16,641 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-27 20:26:16,658 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-27 20:26:16,658 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-27 20:26:16,658 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-27 20:26:16,659 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-27 20:26:16,659 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-27 20:26:16,659 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-27 20:26:16,659 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-27 20:26:16,660 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-27 20:26:16,660 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-27 20:26:16,660 INFO L153 SettingsManager]: * Use SBE=true [2024-06-27 20:26:16,661 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-27 20:26:16,661 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-27 20:26:16,661 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-27 20:26:16,661 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-27 20:26:16,662 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-27 20:26:16,662 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-27 20:26:16,666 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-27 20:26:16,666 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-27 20:26:16,666 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-27 20:26:16,670 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-27 20:26:16,670 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-27 20:26:16,670 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-27 20:26:16,670 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-27 20:26:16,671 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-27 20:26:16,671 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-27 20:26:16,672 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-27 20:26:16,672 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-27 20:26:16,672 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-27 20:26:16,672 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-27 20:26:16,673 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-27 20:26:16,673 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-27 20:26:16,673 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-27 20:26:16,674 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-27 20:26:16,674 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-27 20:26:16,674 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-27 20:26:16,675 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-27 20:26:16,675 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-27 20:26:16,675 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-27 20:26:16,675 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-27 20:26:16,858 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-27 20:26:16,876 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-27 20:26:16,878 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-27 20:26:16,879 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-27 20:26:16,879 INFO L274 PluginConnector]: CDTParser initialized [2024-06-27 20:26:16,880 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/mix038.opt.i [2024-06-27 20:26:17,858 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-27 20:26:18,116 INFO L384 CDTParser]: Found 1 translation units. [2024-06-27 20:26:18,116 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/mix038.opt.i [2024-06-27 20:26:18,127 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/53bb7314c/41af57c00e4e4059a19921ae3b577314/FLAGa17aaccb7 [2024-06-27 20:26:18,137 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/53bb7314c/41af57c00e4e4059a19921ae3b577314 [2024-06-27 20:26:18,139 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-27 20:26:18,139 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-27 20:26:18,140 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-06-19_11-23-25.files/protection/mix038.opt.yml/witness.yml [2024-06-27 20:26:18,266 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-27 20:26:18,267 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-27 20:26:18,268 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-27 20:26:18,268 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-27 20:26:18,271 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-27 20:26:18,272 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.06 08:26:18" (1/2) ... [2024-06-27 20:26:18,272 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@14f75e7b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 08:26:18, skipping insertion in model container [2024-06-27 20:26:18,273 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.06 08:26:18" (1/2) ... [2024-06-27 20:26:18,274 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@5e14745f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 08:26:18, skipping insertion in model container [2024-06-27 20:26:18,274 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 08:26:18" (2/2) ... [2024-06-27 20:26:18,275 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@14f75e7b and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 08:26:18, skipping insertion in model container [2024-06-27 20:26:18,275 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 08:26:18" (2/2) ... [2024-06-27 20:26:18,275 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-27 20:26:18,348 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-27 20:26:18,349 INFO L97 edCorrectnessWitness]: Location invariant before [L836-L836] (((((((((((((((((((! multithreaded || 0 <= __unbuffered_cnt) && (! multithreaded || y$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || (y == 0 || y == 1))) && (! multithreaded || y$read_delayed == (_Bool)0)) && (! multithreaded || y$flush_delayed == (_Bool)0)) && (! multithreaded || (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1))) && (! multithreaded || (y$mem_tmp == 0 || y$mem_tmp == 1))) && (! multithreaded || (z == 0 || z == 1))) && (! multithreaded || y$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || ((x == 0 || x == 1) || x == 2))) && (! multithreaded || (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1))) && (! multithreaded || (y$w_buff1 == 0 || y$w_buff1 == 1))) && (! multithreaded || y$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || y$read_delayed_var == 0)) && (! multithreaded || (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1))) && (! multithreaded || (a == 0 || a == 1))) && (! multithreaded || (y$w_buff0 == 0 || y$w_buff0 == 1)) [2024-06-27 20:26:18,349 INFO L97 edCorrectnessWitness]: Location invariant before [L838-L838] (((((((((((((((((((! multithreaded || 0 <= __unbuffered_cnt) && (! multithreaded || y$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || (y == 0 || y == 1))) && (! multithreaded || y$read_delayed == (_Bool)0)) && (! multithreaded || y$flush_delayed == (_Bool)0)) && (! multithreaded || (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1))) && (! multithreaded || (y$mem_tmp == 0 || y$mem_tmp == 1))) && (! multithreaded || (z == 0 || z == 1))) && (! multithreaded || y$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || ((x == 0 || x == 1) || x == 2))) && (! multithreaded || (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1))) && (! multithreaded || (y$w_buff1 == 0 || y$w_buff1 == 1))) && (! multithreaded || y$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || y$read_delayed_var == 0)) && (! multithreaded || (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1))) && (! multithreaded || (a == 0 || a == 1))) && (! multithreaded || (y$w_buff0 == 0 || y$w_buff0 == 1)) [2024-06-27 20:26:18,349 INFO L97 edCorrectnessWitness]: Location invariant before [L839-L839] (((((((((((((((((((! multithreaded || 0 <= __unbuffered_cnt) && (! multithreaded || y$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || (y == 0 || y == 1))) && (! multithreaded || y$read_delayed == (_Bool)0)) && (! multithreaded || y$flush_delayed == (_Bool)0)) && (! multithreaded || (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1))) && (! multithreaded || (y$mem_tmp == 0 || y$mem_tmp == 1))) && (! multithreaded || (z == 0 || z == 1))) && (! multithreaded || y$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || ((x == 0 || x == 1) || x == 2))) && (! multithreaded || (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1))) && (! multithreaded || (y$w_buff1 == 0 || y$w_buff1 == 1))) && (! multithreaded || y$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || y$read_delayed_var == 0)) && (! multithreaded || (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1))) && (! multithreaded || (a == 0 || a == 1))) && (! multithreaded || (y$w_buff0 == 0 || y$w_buff0 == 1)) [2024-06-27 20:26:18,349 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-27 20:26:18,349 INFO L106 edCorrectnessWitness]: ghost_update [L834-L834] multithreaded = 1; [2024-06-27 20:26:18,384 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-27 20:26:18,699 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-27 20:26:18,710 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-27 20:26:18,857 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-27 20:26:18,884 INFO L206 MainTranslator]: Completed translation [2024-06-27 20:26:18,884 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 08:26:18 WrapperNode [2024-06-27 20:26:18,884 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-27 20:26:18,885 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-27 20:26:18,885 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-27 20:26:18,885 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-27 20:26:18,895 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 27.06 08:26:18" (1/1) ... [2024-06-27 20:26:18,906 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 27.06 08:26:18" (1/1) ... [2024-06-27 20:26:18,927 INFO L138 Inliner]: procedures = 175, calls = 47, calls flagged for inlining = 6, calls inlined = 7, statements flattened = 133 [2024-06-27 20:26:18,927 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-27 20:26:18,928 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-27 20:26:18,928 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-27 20:26:18,928 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-27 20:26:18,936 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 08:26:18" (1/1) ... [2024-06-27 20:26:18,936 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 08:26:18" (1/1) ... [2024-06-27 20:26:18,938 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 08:26:18" (1/1) ... [2024-06-27 20:26:18,949 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2024-06-27 20:26:18,949 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 08:26:18" (1/1) ... [2024-06-27 20:26:18,949 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 08:26:18" (1/1) ... [2024-06-27 20:26:18,955 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 08:26:18" (1/1) ... [2024-06-27 20:26:18,956 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 08:26:18" (1/1) ... [2024-06-27 20:26:18,957 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 08:26:18" (1/1) ... [2024-06-27 20:26:18,958 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 08:26:18" (1/1) ... [2024-06-27 20:26:18,960 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-27 20:26:18,961 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-27 20:26:18,961 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-27 20:26:18,961 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-27 20:26:18,962 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 08:26:18" (1/1) ... [2024-06-27 20:26:18,966 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-27 20:26:18,973 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 20:26:18,983 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-06-27 20:26:18,986 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-06-27 20:26:19,013 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-27 20:26:19,013 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-27 20:26:19,013 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-27 20:26:19,013 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-27 20:26:19,014 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-27 20:26:19,014 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-27 20:26:19,014 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-27 20:26:19,014 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-27 20:26:19,014 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-27 20:26:19,014 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-27 20:26:19,014 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-27 20:26:19,014 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-27 20:26:19,015 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-27 20:26:19,119 INFO L244 CfgBuilder]: Building ICFG [2024-06-27 20:26:19,120 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-27 20:26:19,361 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-27 20:26:19,361 INFO L293 CfgBuilder]: Performing block encoding [2024-06-27 20:26:19,573 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-27 20:26:19,573 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-27 20:26:19,574 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.06 08:26:19 BoogieIcfgContainer [2024-06-27 20:26:19,574 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-27 20:26:19,577 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-27 20:26:19,577 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-27 20:26:19,580 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-27 20:26:19,580 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.06 08:26:18" (1/4) ... [2024-06-27 20:26:19,581 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@446ec464 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.06 08:26:19, skipping insertion in model container [2024-06-27 20:26:19,581 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 08:26:18" (2/4) ... [2024-06-27 20:26:19,582 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@446ec464 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 27.06 08:26:19, skipping insertion in model container [2024-06-27 20:26:19,582 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 08:26:18" (3/4) ... [2024-06-27 20:26:19,582 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@446ec464 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 27.06 08:26:19, skipping insertion in model container [2024-06-27 20:26:19,583 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.06 08:26:19" (4/4) ... [2024-06-27 20:26:19,584 INFO L112 eAbstractionObserver]: Analyzing ICFG mix038.opt.i [2024-06-27 20:26:19,597 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-27 20:26:19,598 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2024-06-27 20:26:19,598 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-27 20:26:19,637 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-27 20:26:19,667 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 52 places, 42 transitions, 96 flow [2024-06-27 20:26:19,694 INFO L124 PetriNetUnfolderBase]: 0/39 cut-off events. [2024-06-27 20:26:19,694 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-27 20:26:19,698 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49 conditions, 39 events. 0/39 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 58 event pairs, 0 based on Foata normal form. 0/36 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2024-06-27 20:26:19,698 INFO L82 GeneralOperation]: Start removeDead. Operand has 52 places, 42 transitions, 96 flow [2024-06-27 20:26:19,700 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 43 places, 33 transitions, 75 flow [2024-06-27 20:26:19,707 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-27 20:26:19,712 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;@214d39de, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-27 20:26:19,712 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2024-06-27 20:26:19,715 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-27 20:26:19,715 INFO L124 PetriNetUnfolderBase]: 0/5 cut-off events. [2024-06-27 20:26:19,715 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-27 20:26:19,716 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:26:19,716 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-06-27 20:26:19,717 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:26:19,720 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:26:19,721 INFO L85 PathProgramCache]: Analyzing trace with hash 359771266, now seen corresponding path program 1 times [2024-06-27 20:26:19,727 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:26:19,728 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [891842901] [2024-06-27 20:26:19,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:26:19,728 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:26:19,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:26:20,505 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:26:20,505 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:26:20,506 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [891842901] [2024-06-27 20:26:20,506 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [891842901] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:26:20,507 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:26:20,507 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-27 20:26:20,508 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1314610444] [2024-06-27 20:26:20,509 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:26:20,514 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-27 20:26:20,518 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:26:20,539 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-27 20:26:20,540 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-27 20:26:20,570 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-27 20:26:20,573 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 33 transitions, 75 flow. Second operand has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 3 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:26:20,573 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:26:20,573 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-27 20:26:20,574 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:26:20,870 INFO L124 PetriNetUnfolderBase]: 1116/1816 cut-off events. [2024-06-27 20:26:20,870 INFO L125 PetriNetUnfolderBase]: For 29/29 co-relation queries the response was YES. [2024-06-27 20:26:20,878 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3567 conditions, 1816 events. 1116/1816 cut-off events. For 29/29 co-relation queries the response was YES. Maximal size of possible extension queue 86. Compared 9229 event pairs, 765 based on Foata normal form. 1/1752 useless extension candidates. Maximal degree in co-relation 3555. Up to 1676 conditions per place. [2024-06-27 20:26:20,887 INFO L140 encePairwiseOnDemand]: 35/42 looper letters, 31 selfloop transitions, 4 changer transitions 0/43 dead transitions. [2024-06-27 20:26:20,888 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 43 transitions, 171 flow [2024-06-27 20:26:20,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-27 20:26:20,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-27 20:26:20,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 80 transitions. [2024-06-27 20:26:20,897 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6349206349206349 [2024-06-27 20:26:20,898 INFO L175 Difference]: Start difference. First operand has 43 places, 33 transitions, 75 flow. Second operand 3 states and 80 transitions. [2024-06-27 20:26:20,899 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 43 transitions, 171 flow [2024-06-27 20:26:20,900 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 43 transitions, 166 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-27 20:26:20,902 INFO L231 Difference]: Finished difference. Result has 43 places, 36 transitions, 102 flow [2024-06-27 20:26:20,904 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=72, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=102, PETRI_PLACES=43, PETRI_TRANSITIONS=36} [2024-06-27 20:26:20,906 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 0 predicate places. [2024-06-27 20:26:20,906 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 36 transitions, 102 flow [2024-06-27 20:26:20,906 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 3 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:26:20,906 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:26:20,907 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:26:20,907 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-27 20:26:20,907 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:26:20,908 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:26:20,908 INFO L85 PathProgramCache]: Analyzing trace with hash 2142835425, now seen corresponding path program 1 times [2024-06-27 20:26:20,908 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:26:20,908 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1661403812] [2024-06-27 20:26:20,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:26:20,908 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:26:20,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:26:21,357 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:26:21,358 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:26:21,358 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1661403812] [2024-06-27 20:26:21,358 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1661403812] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:26:21,358 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:26:21,359 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-27 20:26:21,359 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1021697117] [2024-06-27 20:26:21,359 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:26:21,361 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-27 20:26:21,361 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:26:21,361 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-27 20:26:21,361 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-27 20:26:21,409 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 42 [2024-06-27 20:26:21,410 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 36 transitions, 102 flow. Second operand has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:26:21,410 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:26:21,410 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 42 [2024-06-27 20:26:21,410 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:26:21,662 INFO L124 PetriNetUnfolderBase]: 1280/2007 cut-off events. [2024-06-27 20:26:21,663 INFO L125 PetriNetUnfolderBase]: For 383/383 co-relation queries the response was YES. [2024-06-27 20:26:21,665 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4528 conditions, 2007 events. 1280/2007 cut-off events. For 383/383 co-relation queries the response was YES. Maximal size of possible extension queue 94. Compared 9937 event pairs, 750 based on Foata normal form. 3/1978 useless extension candidates. Maximal degree in co-relation 4516. Up to 1897 conditions per place. [2024-06-27 20:26:21,670 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 39 selfloop transitions, 7 changer transitions 0/53 dead transitions. [2024-06-27 20:26:21,671 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 53 transitions, 240 flow [2024-06-27 20:26:21,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-27 20:26:21,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-27 20:26:21,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 101 transitions. [2024-06-27 20:26:21,672 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6011904761904762 [2024-06-27 20:26:21,672 INFO L175 Difference]: Start difference. First operand has 43 places, 36 transitions, 102 flow. Second operand 4 states and 101 transitions. [2024-06-27 20:26:21,672 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 53 transitions, 240 flow [2024-06-27 20:26:21,673 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 53 transitions, 236 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-27 20:26:21,674 INFO L231 Difference]: Finished difference. Result has 46 places, 39 transitions, 138 flow [2024-06-27 20:26:21,674 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=98, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=138, PETRI_PLACES=46, PETRI_TRANSITIONS=39} [2024-06-27 20:26:21,675 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 3 predicate places. [2024-06-27 20:26:21,675 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 39 transitions, 138 flow [2024-06-27 20:26:21,675 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:26:21,676 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:26:21,676 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:26:21,676 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-27 20:26:21,676 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:26:21,676 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:26:21,677 INFO L85 PathProgramCache]: Analyzing trace with hash 2003389811, now seen corresponding path program 1 times [2024-06-27 20:26:21,677 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:26:21,677 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [892167182] [2024-06-27 20:26:21,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:26:21,677 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:26:21,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:26:22,180 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:26:22,181 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:26:22,181 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [892167182] [2024-06-27 20:26:22,182 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [892167182] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:26:22,182 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:26:22,182 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-27 20:26:22,183 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1418925165] [2024-06-27 20:26:22,183 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:26:22,183 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-27 20:26:22,183 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:26:22,184 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-27 20:26:22,184 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-27 20:26:22,241 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 42 [2024-06-27 20:26:22,243 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 39 transitions, 138 flow. Second operand has 5 states, 5 states have (on average 14.2) internal successors, (71), 5 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:26:22,243 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:26:22,243 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 42 [2024-06-27 20:26:22,243 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:26:22,484 INFO L124 PetriNetUnfolderBase]: 1302/2076 cut-off events. [2024-06-27 20:26:22,485 INFO L125 PetriNetUnfolderBase]: For 1126/1126 co-relation queries the response was YES. [2024-06-27 20:26:22,487 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5163 conditions, 2076 events. 1302/2076 cut-off events. For 1126/1126 co-relation queries the response was YES. Maximal size of possible extension queue 95. Compared 10481 event pairs, 470 based on Foata normal form. 7/2070 useless extension candidates. Maximal degree in co-relation 5149. Up to 1800 conditions per place. [2024-06-27 20:26:22,493 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 55 selfloop transitions, 16 changer transitions 0/78 dead transitions. [2024-06-27 20:26:22,493 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 78 transitions, 406 flow [2024-06-27 20:26:22,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 20:26:22,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 20:26:22,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 135 transitions. [2024-06-27 20:26:22,494 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6428571428571429 [2024-06-27 20:26:22,495 INFO L175 Difference]: Start difference. First operand has 46 places, 39 transitions, 138 flow. Second operand 5 states and 135 transitions. [2024-06-27 20:26:22,495 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 78 transitions, 406 flow [2024-06-27 20:26:22,496 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 78 transitions, 392 flow, removed 2 selfloop flow, removed 2 redundant places. [2024-06-27 20:26:22,497 INFO L231 Difference]: Finished difference. Result has 51 places, 50 transitions, 237 flow [2024-06-27 20:26:22,497 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=124, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=237, PETRI_PLACES=51, PETRI_TRANSITIONS=50} [2024-06-27 20:26:22,498 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 8 predicate places. [2024-06-27 20:26:22,498 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 50 transitions, 237 flow [2024-06-27 20:26:22,498 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.2) internal successors, (71), 5 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:26:22,498 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:26:22,498 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:26:22,499 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-27 20:26:22,499 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:26:22,499 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:26:22,499 INFO L85 PathProgramCache]: Analyzing trace with hash 1967601872, now seen corresponding path program 1 times [2024-06-27 20:26:22,499 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:26:22,500 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [856134653] [2024-06-27 20:26:22,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:26:22,500 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:26:22,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:26:23,055 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:26:23,055 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:26:23,055 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [856134653] [2024-06-27 20:26:23,056 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [856134653] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:26:23,056 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:26:23,056 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 20:26:23,056 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [78996193] [2024-06-27 20:26:23,056 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:26:23,056 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 20:26:23,056 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:26:23,057 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 20:26:23,057 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-27 20:26:23,110 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 42 [2024-06-27 20:26:23,111 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 50 transitions, 237 flow. Second operand has 6 states, 6 states have (on average 14.166666666666666) internal successors, (85), 6 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:26:23,111 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:26:23,111 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 42 [2024-06-27 20:26:23,111 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:26:23,430 INFO L124 PetriNetUnfolderBase]: 1384/2220 cut-off events. [2024-06-27 20:26:23,430 INFO L125 PetriNetUnfolderBase]: For 2892/2892 co-relation queries the response was YES. [2024-06-27 20:26:23,433 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6579 conditions, 2220 events. 1384/2220 cut-off events. For 2892/2892 co-relation queries the response was YES. Maximal size of possible extension queue 110. Compared 11470 event pairs, 321 based on Foata normal form. 26/2231 useless extension candidates. Maximal degree in co-relation 6562. Up to 1764 conditions per place. [2024-06-27 20:26:23,440 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 63 selfloop transitions, 18 changer transitions 0/88 dead transitions. [2024-06-27 20:26:23,441 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 88 transitions, 523 flow [2024-06-27 20:26:23,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 20:26:23,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 20:26:23,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 158 transitions. [2024-06-27 20:26:23,442 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.626984126984127 [2024-06-27 20:26:23,442 INFO L175 Difference]: Start difference. First operand has 51 places, 50 transitions, 237 flow. Second operand 6 states and 158 transitions. [2024-06-27 20:26:23,442 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 88 transitions, 523 flow [2024-06-27 20:26:23,445 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 88 transitions, 515 flow, removed 4 selfloop flow, removed 0 redundant places. [2024-06-27 20:26:23,446 INFO L231 Difference]: Finished difference. Result has 56 places, 51 transitions, 285 flow [2024-06-27 20:26:23,446 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=221, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=285, PETRI_PLACES=56, PETRI_TRANSITIONS=51} [2024-06-27 20:26:23,447 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 13 predicate places. [2024-06-27 20:26:23,447 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 51 transitions, 285 flow [2024-06-27 20:26:23,447 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.166666666666666) internal successors, (85), 6 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:26:23,447 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:26:23,447 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:26:23,447 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-27 20:26:23,448 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:26:23,448 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:26:23,448 INFO L85 PathProgramCache]: Analyzing trace with hash 529676278, now seen corresponding path program 1 times [2024-06-27 20:26:23,448 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:26:23,448 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1569767403] [2024-06-27 20:26:23,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:26:23,449 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:26:23,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:26:23,983 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:26:23,983 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:26:23,983 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1569767403] [2024-06-27 20:26:23,983 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1569767403] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:26:23,984 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:26:23,984 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 20:26:23,984 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1039260740] [2024-06-27 20:26:23,984 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:26:23,984 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 20:26:23,985 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:26:23,985 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 20:26:23,985 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-27 20:26:24,045 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-27 20:26:24,046 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 51 transitions, 285 flow. Second operand has 6 states, 6 states have (on average 13.5) internal successors, (81), 6 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:26:24,046 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:26:24,046 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-27 20:26:24,046 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:26:24,434 INFO L124 PetriNetUnfolderBase]: 1204/2027 cut-off events. [2024-06-27 20:26:24,434 INFO L125 PetriNetUnfolderBase]: For 3655/3655 co-relation queries the response was YES. [2024-06-27 20:26:24,439 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6360 conditions, 2027 events. 1204/2027 cut-off events. For 3655/3655 co-relation queries the response was YES. Maximal size of possible extension queue 102. Compared 10900 event pairs, 447 based on Foata normal form. 4/2022 useless extension candidates. Maximal degree in co-relation 6339. Up to 1814 conditions per place. [2024-06-27 20:26:24,447 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 48 selfloop transitions, 8 changer transitions 0/63 dead transitions. [2024-06-27 20:26:24,447 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 63 transitions, 427 flow [2024-06-27 20:26:24,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 20:26:24,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 20:26:24,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 105 transitions. [2024-06-27 20:26:24,449 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-06-27 20:26:24,449 INFO L175 Difference]: Start difference. First operand has 56 places, 51 transitions, 285 flow. Second operand 5 states and 105 transitions. [2024-06-27 20:26:24,450 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 63 transitions, 427 flow [2024-06-27 20:26:24,454 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 63 transitions, 383 flow, removed 6 selfloop flow, removed 4 redundant places. [2024-06-27 20:26:24,457 INFO L231 Difference]: Finished difference. Result has 57 places, 51 transitions, 265 flow [2024-06-27 20:26:24,457 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=241, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=265, PETRI_PLACES=57, PETRI_TRANSITIONS=51} [2024-06-27 20:26:24,459 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 14 predicate places. [2024-06-27 20:26:24,460 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 51 transitions, 265 flow [2024-06-27 20:26:24,460 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.5) internal successors, (81), 6 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:26:24,464 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:26:24,464 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:26:24,464 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-27 20:26:24,464 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:26:24,465 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:26:24,465 INFO L85 PathProgramCache]: Analyzing trace with hash 1948773619, now seen corresponding path program 1 times [2024-06-27 20:26:24,465 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:26:24,465 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1006582362] [2024-06-27 20:26:24,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:26:24,465 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:26:24,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:26:25,032 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:26:25,032 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:26:25,032 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1006582362] [2024-06-27 20:26:25,032 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1006582362] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:26:25,033 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:26:25,033 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 20:26:25,033 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [480738701] [2024-06-27 20:26:25,033 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:26:25,033 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 20:26:25,033 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:26:25,034 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 20:26:25,034 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-27 20:26:25,121 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-27 20:26:25,121 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 51 transitions, 265 flow. Second operand has 7 states, 7 states have (on average 12.428571428571429) internal successors, (87), 7 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:26:25,121 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:26:25,121 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-27 20:26:25,121 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:26:25,604 INFO L124 PetriNetUnfolderBase]: 1386/2222 cut-off events. [2024-06-27 20:26:25,604 INFO L125 PetriNetUnfolderBase]: For 4743/4743 co-relation queries the response was YES. [2024-06-27 20:26:25,607 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7077 conditions, 2222 events. 1386/2222 cut-off events. For 4743/4743 co-relation queries the response was YES. Maximal size of possible extension queue 109. Compared 11436 event pairs, 459 based on Foata normal form. 8/2214 useless extension candidates. Maximal degree in co-relation 7054. Up to 1943 conditions per place. [2024-06-27 20:26:25,614 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 52 selfloop transitions, 19 changer transitions 0/77 dead transitions. [2024-06-27 20:26:25,614 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 77 transitions, 505 flow [2024-06-27 20:26:25,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 20:26:25,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 20:26:25,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 130 transitions. [2024-06-27 20:26:25,616 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5158730158730159 [2024-06-27 20:26:25,616 INFO L175 Difference]: Start difference. First operand has 57 places, 51 transitions, 265 flow. Second operand 6 states and 130 transitions. [2024-06-27 20:26:25,616 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 77 transitions, 505 flow [2024-06-27 20:26:25,619 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 77 transitions, 483 flow, removed 2 selfloop flow, removed 4 redundant places. [2024-06-27 20:26:25,621 INFO L231 Difference]: Finished difference. Result has 59 places, 54 transitions, 315 flow [2024-06-27 20:26:25,621 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=243, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=315, PETRI_PLACES=59, PETRI_TRANSITIONS=54} [2024-06-27 20:26:25,623 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 16 predicate places. [2024-06-27 20:26:25,623 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 54 transitions, 315 flow [2024-06-27 20:26:25,624 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.428571428571429) internal successors, (87), 7 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:26:25,624 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:26:25,624 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:26:25,624 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-27 20:26:25,624 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:26:25,625 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:26:25,625 INFO L85 PathProgramCache]: Analyzing trace with hash -2082191787, now seen corresponding path program 2 times [2024-06-27 20:26:25,625 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:26:25,628 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [671296684] [2024-06-27 20:26:25,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:26:25,628 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:26:25,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:26:26,216 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:26:26,217 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:26:26,217 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [671296684] [2024-06-27 20:26:26,218 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [671296684] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:26:26,218 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:26:26,218 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 20:26:26,218 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2699762] [2024-06-27 20:26:26,218 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:26:26,219 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 20:26:26,219 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:26:26,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 20:26:26,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-27 20:26:26,285 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-27 20:26:26,286 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 54 transitions, 315 flow. Second operand has 7 states, 7 states have (on average 12.428571428571429) internal successors, (87), 7 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:26:26,286 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:26:26,286 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-27 20:26:26,286 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:26:26,725 INFO L124 PetriNetUnfolderBase]: 1354/2151 cut-off events. [2024-06-27 20:26:26,725 INFO L125 PetriNetUnfolderBase]: For 5814/5818 co-relation queries the response was YES. [2024-06-27 20:26:26,729 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7152 conditions, 2151 events. 1354/2151 cut-off events. For 5814/5818 co-relation queries the response was YES. Maximal size of possible extension queue 104. Compared 10816 event pairs, 469 based on Foata normal form. 5/2136 useless extension candidates. Maximal degree in co-relation 7129. Up to 1895 conditions per place. [2024-06-27 20:26:26,744 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 46 selfloop transitions, 20 changer transitions 0/72 dead transitions. [2024-06-27 20:26:26,744 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 72 transitions, 491 flow [2024-06-27 20:26:26,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 20:26:26,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 20:26:26,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 126 transitions. [2024-06-27 20:26:26,745 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-06-27 20:26:26,745 INFO L175 Difference]: Start difference. First operand has 59 places, 54 transitions, 315 flow. Second operand 6 states and 126 transitions. [2024-06-27 20:26:26,746 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 72 transitions, 491 flow [2024-06-27 20:26:26,750 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 72 transitions, 462 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-06-27 20:26:26,751 INFO L231 Difference]: Finished difference. Result has 62 places, 54 transitions, 334 flow [2024-06-27 20:26:26,751 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=286, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=334, PETRI_PLACES=62, PETRI_TRANSITIONS=54} [2024-06-27 20:26:26,752 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 19 predicate places. [2024-06-27 20:26:26,752 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 54 transitions, 334 flow [2024-06-27 20:26:26,752 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.428571428571429) internal successors, (87), 7 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:26:26,752 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:26:26,752 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:26:26,752 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-27 20:26:26,753 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:26:26,753 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:26:26,753 INFO L85 PathProgramCache]: Analyzing trace with hash -400245517, now seen corresponding path program 1 times [2024-06-27 20:26:26,753 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:26:26,753 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1585714811] [2024-06-27 20:26:26,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:26:26,754 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:26:26,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:26:27,639 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:26:27,640 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:26:27,640 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1585714811] [2024-06-27 20:26:27,640 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1585714811] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:26:27,640 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:26:27,640 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:26:27,641 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [853255767] [2024-06-27 20:26:27,641 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:26:27,641 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:26:27,641 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:26:27,641 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:26:27,642 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:26:27,734 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-27 20:26:27,734 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 54 transitions, 334 flow. Second operand has 8 states, 8 states have (on average 13.375) internal successors, (107), 8 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) [2024-06-27 20:26:27,734 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:26:27,734 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-27 20:26:27,734 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:26:28,138 INFO L124 PetriNetUnfolderBase]: 1176/1972 cut-off events. [2024-06-27 20:26:28,138 INFO L125 PetriNetUnfolderBase]: For 6120/6120 co-relation queries the response was YES. [2024-06-27 20:26:28,142 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6560 conditions, 1972 events. 1176/1972 cut-off events. For 6120/6120 co-relation queries the response was YES. Maximal size of possible extension queue 96. Compared 10431 event pairs, 406 based on Foata normal form. 4/1961 useless extension candidates. Maximal degree in co-relation 6536. Up to 1742 conditions per place. [2024-06-27 20:26:28,147 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 59 selfloop transitions, 13 changer transitions 0/79 dead transitions. [2024-06-27 20:26:28,148 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 79 transitions, 565 flow [2024-06-27 20:26:28,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:26:28,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:26:28,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 142 transitions. [2024-06-27 20:26:28,150 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48299319727891155 [2024-06-27 20:26:28,151 INFO L175 Difference]: Start difference. First operand has 62 places, 54 transitions, 334 flow. Second operand 7 states and 142 transitions. [2024-06-27 20:26:28,151 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 79 transitions, 565 flow [2024-06-27 20:26:28,154 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 79 transitions, 495 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-06-27 20:26:28,155 INFO L231 Difference]: Finished difference. Result has 64 places, 59 transitions, 344 flow [2024-06-27 20:26:28,155 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=269, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=344, PETRI_PLACES=64, PETRI_TRANSITIONS=59} [2024-06-27 20:26:28,156 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 21 predicate places. [2024-06-27 20:26:28,156 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 59 transitions, 344 flow [2024-06-27 20:26:28,156 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.375) internal successors, (107), 8 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) [2024-06-27 20:26:28,156 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:26:28,156 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:26:28,157 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-27 20:26:28,157 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:26:28,157 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:26:28,157 INFO L85 PathProgramCache]: Analyzing trace with hash 275117078, now seen corresponding path program 1 times [2024-06-27 20:26:28,157 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:26:28,157 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [450103551] [2024-06-27 20:26:28,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:26:28,158 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:26:28,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:26:28,647 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:26:28,647 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:26:28,647 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [450103551] [2024-06-27 20:26:28,648 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [450103551] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:26:28,648 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:26:28,648 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 20:26:28,648 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [588743781] [2024-06-27 20:26:28,648 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:26:28,649 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 20:26:28,649 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:26:28,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 20:26:28,650 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-27 20:26:28,712 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-27 20:26:28,712 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 59 transitions, 344 flow. Second operand has 6 states, 6 states have (on average 14.0) internal successors, (84), 6 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:26:28,713 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:26:28,713 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-27 20:26:28,713 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:26:28,966 INFO L124 PetriNetUnfolderBase]: 1173/1968 cut-off events. [2024-06-27 20:26:28,966 INFO L125 PetriNetUnfolderBase]: For 6996/6996 co-relation queries the response was YES. [2024-06-27 20:26:28,970 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6808 conditions, 1968 events. 1173/1968 cut-off events. For 6996/6996 co-relation queries the response was YES. Maximal size of possible extension queue 96. Compared 10392 event pairs, 420 based on Foata normal form. 1/1954 useless extension candidates. Maximal degree in co-relation 6782. Up to 1771 conditions per place. [2024-06-27 20:26:28,975 INFO L140 encePairwiseOnDemand]: 35/42 looper letters, 55 selfloop transitions, 8 changer transitions 0/70 dead transitions. [2024-06-27 20:26:28,975 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 70 transitions, 510 flow [2024-06-27 20:26:28,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 20:26:28,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 20:26:28,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 100 transitions. [2024-06-27 20:26:28,977 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47619047619047616 [2024-06-27 20:26:28,977 INFO L175 Difference]: Start difference. First operand has 64 places, 59 transitions, 344 flow. Second operand 5 states and 100 transitions. [2024-06-27 20:26:28,977 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 70 transitions, 510 flow [2024-06-27 20:26:28,981 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 70 transitions, 477 flow, removed 6 selfloop flow, removed 4 redundant places. [2024-06-27 20:26:28,983 INFO L231 Difference]: Finished difference. Result has 65 places, 62 transitions, 359 flow [2024-06-27 20:26:28,983 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=311, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=359, PETRI_PLACES=65, PETRI_TRANSITIONS=62} [2024-06-27 20:26:28,984 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 22 predicate places. [2024-06-27 20:26:28,984 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 62 transitions, 359 flow [2024-06-27 20:26:28,984 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.0) internal successors, (84), 6 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:26:28,985 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:26:28,985 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:26:28,985 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-27 20:26:28,985 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:26:28,985 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:26:28,985 INFO L85 PathProgramCache]: Analyzing trace with hash -61304236, now seen corresponding path program 1 times [2024-06-27 20:26:28,986 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:26:28,989 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [429915417] [2024-06-27 20:26:28,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:26:28,990 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:26:29,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:26:29,643 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:26:29,643 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:26:29,643 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [429915417] [2024-06-27 20:26:29,644 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [429915417] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:26:29,644 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:26:29,644 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 20:26:29,644 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2018125057] [2024-06-27 20:26:29,644 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:26:29,644 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 20:26:29,645 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:26:29,645 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 20:26:29,645 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-27 20:26:29,701 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-27 20:26:29,702 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 62 transitions, 359 flow. Second operand has 7 states, 7 states have (on average 12.857142857142858) internal successors, (90), 7 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:26:29,702 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:26:29,702 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-27 20:26:29,702 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:26:29,962 INFO L124 PetriNetUnfolderBase]: 1340/2159 cut-off events. [2024-06-27 20:26:29,962 INFO L125 PetriNetUnfolderBase]: For 9934/9934 co-relation queries the response was YES. [2024-06-27 20:26:29,966 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7958 conditions, 2159 events. 1340/2159 cut-off events. For 9934/9934 co-relation queries the response was YES. Maximal size of possible extension queue 105. Compared 11065 event pairs, 492 based on Foata normal form. 1/2158 useless extension candidates. Maximal degree in co-relation 7931. Up to 2009 conditions per place. [2024-06-27 20:26:29,972 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 57 selfloop transitions, 11 changer transitions 0/74 dead transitions. [2024-06-27 20:26:29,972 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 74 transitions, 541 flow [2024-06-27 20:26:29,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 20:26:29,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 20:26:29,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 111 transitions. [2024-06-27 20:26:29,973 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44047619047619047 [2024-06-27 20:26:29,973 INFO L175 Difference]: Start difference. First operand has 65 places, 62 transitions, 359 flow. Second operand 6 states and 111 transitions. [2024-06-27 20:26:29,973 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 74 transitions, 541 flow [2024-06-27 20:26:29,978 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 74 transitions, 515 flow, removed 7 selfloop flow, removed 3 redundant places. [2024-06-27 20:26:29,979 INFO L231 Difference]: Finished difference. Result has 68 places, 65 transitions, 391 flow [2024-06-27 20:26:29,979 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=333, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=391, PETRI_PLACES=68, PETRI_TRANSITIONS=65} [2024-06-27 20:26:29,979 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 25 predicate places. [2024-06-27 20:26:29,980 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 65 transitions, 391 flow [2024-06-27 20:26:29,980 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.857142857142858) internal successors, (90), 7 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:26:29,980 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:26:29,980 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:26:29,980 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-27 20:26:29,980 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:26:29,981 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:26:29,981 INFO L85 PathProgramCache]: Analyzing trace with hash -213503600, now seen corresponding path program 1 times [2024-06-27 20:26:29,981 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:26:29,981 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1865720420] [2024-06-27 20:26:29,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:26:29,981 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:26:29,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:26:30,592 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:26:30,593 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:26:30,593 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1865720420] [2024-06-27 20:26:30,593 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1865720420] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:26:30,593 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:26:30,593 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:26:30,593 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1970364804] [2024-06-27 20:26:30,593 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:26:30,594 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:26:30,594 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:26:30,594 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:26:30,594 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:26:30,703 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-27 20:26:30,704 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 65 transitions, 391 flow. Second operand has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:26:30,704 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:26:30,704 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-27 20:26:30,704 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:26:31,189 INFO L124 PetriNetUnfolderBase]: 1543/2451 cut-off events. [2024-06-27 20:26:31,189 INFO L125 PetriNetUnfolderBase]: For 16141/16141 co-relation queries the response was YES. [2024-06-27 20:26:31,195 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9796 conditions, 2451 events. 1543/2451 cut-off events. For 16141/16141 co-relation queries the response was YES. Maximal size of possible extension queue 123. Compared 12708 event pairs, 357 based on Foata normal form. 16/2458 useless extension candidates. Maximal degree in co-relation 9768. Up to 1728 conditions per place. [2024-06-27 20:26:31,202 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 73 selfloop transitions, 22 changer transitions 0/102 dead transitions. [2024-06-27 20:26:31,202 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 102 transitions, 739 flow [2024-06-27 20:26:31,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:26:31,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:26:31,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 153 transitions. [2024-06-27 20:26:31,204 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5204081632653061 [2024-06-27 20:26:31,204 INFO L175 Difference]: Start difference. First operand has 68 places, 65 transitions, 391 flow. Second operand 7 states and 153 transitions. [2024-06-27 20:26:31,204 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 102 transitions, 739 flow [2024-06-27 20:26:31,211 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 102 transitions, 703 flow, removed 9 selfloop flow, removed 4 redundant places. [2024-06-27 20:26:31,212 INFO L231 Difference]: Finished difference. Result has 71 places, 67 transitions, 431 flow [2024-06-27 20:26:31,212 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=355, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=431, PETRI_PLACES=71, PETRI_TRANSITIONS=67} [2024-06-27 20:26:31,212 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 28 predicate places. [2024-06-27 20:26:31,213 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 67 transitions, 431 flow [2024-06-27 20:26:31,213 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:26:31,213 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:26:31,213 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:26:31,213 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-27 20:26:31,213 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:26:31,214 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:26:31,214 INFO L85 PathProgramCache]: Analyzing trace with hash 724329608, now seen corresponding path program 2 times [2024-06-27 20:26:31,214 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:26:31,214 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1137354175] [2024-06-27 20:26:31,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:26:31,214 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:26:31,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:26:31,741 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:26:31,741 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:26:31,741 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1137354175] [2024-06-27 20:26:31,741 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1137354175] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:26:31,741 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:26:31,742 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:26:31,742 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [322190284] [2024-06-27 20:26:31,742 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:26:31,742 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:26:31,742 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:26:31,743 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:26:31,743 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:26:31,812 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-27 20:26:31,812 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 67 transitions, 431 flow. Second operand has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:26:31,812 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:26:31,813 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-27 20:26:31,813 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:26:32,317 INFO L124 PetriNetUnfolderBase]: 1581/2534 cut-off events. [2024-06-27 20:26:32,317 INFO L125 PetriNetUnfolderBase]: For 19060/19060 co-relation queries the response was YES. [2024-06-27 20:26:32,322 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10381 conditions, 2534 events. 1581/2534 cut-off events. For 19060/19060 co-relation queries the response was YES. Maximal size of possible extension queue 129. Compared 13390 event pairs, 510 based on Foata normal form. 24/2553 useless extension candidates. Maximal degree in co-relation 10352. Up to 2107 conditions per place. [2024-06-27 20:26:32,329 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 68 selfloop transitions, 23 changer transitions 0/98 dead transitions. [2024-06-27 20:26:32,330 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 98 transitions, 713 flow [2024-06-27 20:26:32,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:26:32,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:26:32,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 150 transitions. [2024-06-27 20:26:32,331 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5102040816326531 [2024-06-27 20:26:32,331 INFO L175 Difference]: Start difference. First operand has 71 places, 67 transitions, 431 flow. Second operand 7 states and 150 transitions. [2024-06-27 20:26:32,331 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 98 transitions, 713 flow [2024-06-27 20:26:32,339 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 98 transitions, 683 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-06-27 20:26:32,340 INFO L231 Difference]: Finished difference. Result has 75 places, 69 transitions, 479 flow [2024-06-27 20:26:32,340 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=401, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=479, PETRI_PLACES=75, PETRI_TRANSITIONS=69} [2024-06-27 20:26:32,341 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 32 predicate places. [2024-06-27 20:26:32,341 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 69 transitions, 479 flow [2024-06-27 20:26:32,341 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:26:32,341 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:26:32,341 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:26:32,342 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-27 20:26:32,342 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:26:32,342 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:26:32,342 INFO L85 PathProgramCache]: Analyzing trace with hash -1911872075, now seen corresponding path program 1 times [2024-06-27 20:26:32,342 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:26:32,342 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [384782907] [2024-06-27 20:26:32,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:26:32,343 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:26:32,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:26:32,832 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:26:32,833 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:26:32,833 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [384782907] [2024-06-27 20:26:32,833 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [384782907] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:26:32,833 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:26:32,833 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 20:26:32,833 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1604199418] [2024-06-27 20:26:32,833 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:26:32,834 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 20:26:32,834 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:26:32,834 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 20:26:32,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 20:26:32,904 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-27 20:26:32,904 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 69 transitions, 479 flow. Second operand has 7 states, 7 states have (on average 12.857142857142858) internal successors, (90), 7 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:26:32,904 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:26:32,904 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-27 20:26:32,904 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:26:33,230 INFO L124 PetriNetUnfolderBase]: 1616/2586 cut-off events. [2024-06-27 20:26:33,230 INFO L125 PetriNetUnfolderBase]: For 20301/20301 co-relation queries the response was YES. [2024-06-27 20:26:33,235 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10972 conditions, 2586 events. 1616/2586 cut-off events. For 20301/20301 co-relation queries the response was YES. Maximal size of possible extension queue 131. Compared 13626 event pairs, 587 based on Foata normal form. 1/2585 useless extension candidates. Maximal degree in co-relation 10941. Up to 2404 conditions per place. [2024-06-27 20:26:33,242 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 69 selfloop transitions, 11 changer transitions 0/87 dead transitions. [2024-06-27 20:26:33,242 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 87 transitions, 703 flow [2024-06-27 20:26:33,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 20:26:33,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 20:26:33,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 117 transitions. [2024-06-27 20:26:33,243 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4642857142857143 [2024-06-27 20:26:33,243 INFO L175 Difference]: Start difference. First operand has 75 places, 69 transitions, 479 flow. Second operand 6 states and 117 transitions. [2024-06-27 20:26:33,243 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 87 transitions, 703 flow [2024-06-27 20:26:33,253 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 87 transitions, 649 flow, removed 6 selfloop flow, removed 5 redundant places. [2024-06-27 20:26:33,254 INFO L231 Difference]: Finished difference. Result has 76 places, 72 transitions, 485 flow [2024-06-27 20:26:33,254 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=425, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=485, PETRI_PLACES=76, PETRI_TRANSITIONS=72} [2024-06-27 20:26:33,254 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 33 predicate places. [2024-06-27 20:26:33,255 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 72 transitions, 485 flow [2024-06-27 20:26:33,255 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.857142857142858) internal successors, (90), 7 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:26:33,255 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:26:33,255 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:26:33,255 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-27 20:26:33,255 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:26:33,255 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:26:33,256 INFO L85 PathProgramCache]: Analyzing trace with hash -1086757430, now seen corresponding path program 1 times [2024-06-27 20:26:33,256 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:26:33,256 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1921977946] [2024-06-27 20:26:33,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:26:33,256 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:26:33,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:26:34,051 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:26:34,052 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:26:34,052 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1921977946] [2024-06-27 20:26:34,052 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1921977946] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:26:34,052 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:26:34,052 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:26:34,052 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1936439333] [2024-06-27 20:26:34,052 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:26:34,053 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:26:34,053 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:26:34,053 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:26:34,053 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:26:34,134 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-27 20:26:34,134 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 72 transitions, 485 flow. Second operand has 9 states, 9 states have (on average 12.333333333333334) internal successors, (111), 9 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:26:34,135 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:26:34,135 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-27 20:26:34,135 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:26:34,647 INFO L124 PetriNetUnfolderBase]: 1644/2612 cut-off events. [2024-06-27 20:26:34,647 INFO L125 PetriNetUnfolderBase]: For 23320/23324 co-relation queries the response was YES. [2024-06-27 20:26:34,653 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11437 conditions, 2612 events. 1644/2612 cut-off events. For 23320/23324 co-relation queries the response was YES. Maximal size of possible extension queue 131. Compared 13634 event pairs, 546 based on Foata normal form. 5/2608 useless extension candidates. Maximal degree in co-relation 11405. Up to 2298 conditions per place. [2024-06-27 20:26:34,661 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 69 selfloop transitions, 28 changer transitions 0/104 dead transitions. [2024-06-27 20:26:34,661 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 104 transitions, 798 flow [2024-06-27 20:26:34,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:26:34,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:26:34,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 162 transitions. [2024-06-27 20:26:34,662 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48214285714285715 [2024-06-27 20:26:34,662 INFO L175 Difference]: Start difference. First operand has 76 places, 72 transitions, 485 flow. Second operand 8 states and 162 transitions. [2024-06-27 20:26:34,662 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 104 transitions, 798 flow [2024-06-27 20:26:34,673 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 104 transitions, 760 flow, removed 10 selfloop flow, removed 4 redundant places. [2024-06-27 20:26:34,674 INFO L231 Difference]: Finished difference. Result has 81 places, 78 transitions, 573 flow [2024-06-27 20:26:34,674 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=447, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=573, PETRI_PLACES=81, PETRI_TRANSITIONS=78} [2024-06-27 20:26:34,675 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 38 predicate places. [2024-06-27 20:26:34,675 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 78 transitions, 573 flow [2024-06-27 20:26:34,675 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.333333333333334) internal successors, (111), 9 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:26:34,675 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:26:34,675 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:26:34,675 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-27 20:26:34,676 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:26:34,676 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:26:34,676 INFO L85 PathProgramCache]: Analyzing trace with hash -1080501320, now seen corresponding path program 2 times [2024-06-27 20:26:34,676 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:26:34,676 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [152200057] [2024-06-27 20:26:34,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:26:34,677 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:26:34,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:26:35,649 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:26:35,649 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:26:35,649 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [152200057] [2024-06-27 20:26:35,649 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [152200057] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:26:35,649 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:26:35,649 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:26:35,649 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1088320525] [2024-06-27 20:26:35,649 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:26:35,650 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:26:35,650 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:26:35,650 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:26:35,650 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:26:35,735 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-27 20:26:35,735 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 78 transitions, 573 flow. Second operand has 9 states, 9 states have (on average 12.333333333333334) internal successors, (111), 9 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:26:35,735 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:26:35,735 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-27 20:26:35,735 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:26:36,270 INFO L124 PetriNetUnfolderBase]: 1636/2600 cut-off events. [2024-06-27 20:26:36,270 INFO L125 PetriNetUnfolderBase]: For 26782/26786 co-relation queries the response was YES. [2024-06-27 20:26:36,277 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11960 conditions, 2600 events. 1636/2600 cut-off events. For 26782/26786 co-relation queries the response was YES. Maximal size of possible extension queue 130. Compared 13558 event pairs, 544 based on Foata normal form. 5/2596 useless extension candidates. Maximal degree in co-relation 11926. Up to 2286 conditions per place. [2024-06-27 20:26:36,284 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 70 selfloop transitions, 34 changer transitions 0/111 dead transitions. [2024-06-27 20:26:36,285 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 111 transitions, 932 flow [2024-06-27 20:26:36,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:26:36,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:26:36,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 162 transitions. [2024-06-27 20:26:36,286 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48214285714285715 [2024-06-27 20:26:36,286 INFO L175 Difference]: Start difference. First operand has 81 places, 78 transitions, 573 flow. Second operand 8 states and 162 transitions. [2024-06-27 20:26:36,286 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 111 transitions, 932 flow [2024-06-27 20:26:36,300 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 111 transitions, 849 flow, removed 11 selfloop flow, removed 5 redundant places. [2024-06-27 20:26:36,301 INFO L231 Difference]: Finished difference. Result has 85 places, 86 transitions, 668 flow [2024-06-27 20:26:36,301 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=500, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=668, PETRI_PLACES=85, PETRI_TRANSITIONS=86} [2024-06-27 20:26:36,302 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 42 predicate places. [2024-06-27 20:26:36,302 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 86 transitions, 668 flow [2024-06-27 20:26:36,302 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.333333333333334) internal successors, (111), 9 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:26:36,302 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:26:36,302 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:26:36,302 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-27 20:26:36,303 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:26:36,303 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:26:36,303 INFO L85 PathProgramCache]: Analyzing trace with hash 1911128082, now seen corresponding path program 3 times [2024-06-27 20:26:36,303 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:26:36,303 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1309441028] [2024-06-27 20:26:36,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:26:36,303 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:26:36,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:26:37,190 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:26:37,190 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:26:37,191 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1309441028] [2024-06-27 20:26:37,191 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1309441028] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:26:37,191 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:26:37,191 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:26:37,191 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [852296080] [2024-06-27 20:26:37,191 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:26:37,191 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:26:37,192 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:26:37,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:26:37,192 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:26:37,302 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-27 20:26:37,303 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 86 transitions, 668 flow. Second operand has 9 states, 9 states have (on average 12.333333333333334) internal successors, (111), 9 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:26:37,303 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:26:37,303 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-27 20:26:37,303 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:26:37,786 INFO L124 PetriNetUnfolderBase]: 1669/2669 cut-off events. [2024-06-27 20:26:37,786 INFO L125 PetriNetUnfolderBase]: For 30151/30155 co-relation queries the response was YES. [2024-06-27 20:26:37,792 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12524 conditions, 2669 events. 1669/2669 cut-off events. For 30151/30155 co-relation queries the response was YES. Maximal size of possible extension queue 136. Compared 14123 event pairs, 449 based on Foata normal form. 5/2665 useless extension candidates. Maximal degree in co-relation 12488. Up to 2176 conditions per place. [2024-06-27 20:26:37,800 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 70 selfloop transitions, 41 changer transitions 0/118 dead transitions. [2024-06-27 20:26:37,800 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 118 transitions, 1006 flow [2024-06-27 20:26:37,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:26:37,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:26:37,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 166 transitions. [2024-06-27 20:26:37,802 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49404761904761907 [2024-06-27 20:26:37,802 INFO L175 Difference]: Start difference. First operand has 85 places, 86 transitions, 668 flow. Second operand 8 states and 166 transitions. [2024-06-27 20:26:37,802 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 118 transitions, 1006 flow [2024-06-27 20:26:37,846 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 118 transitions, 942 flow, removed 14 selfloop flow, removed 3 redundant places. [2024-06-27 20:26:37,850 INFO L231 Difference]: Finished difference. Result has 91 places, 89 transitions, 750 flow [2024-06-27 20:26:37,850 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=606, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=750, PETRI_PLACES=91, PETRI_TRANSITIONS=89} [2024-06-27 20:26:37,850 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 48 predicate places. [2024-06-27 20:26:37,851 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 89 transitions, 750 flow [2024-06-27 20:26:37,851 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.333333333333334) internal successors, (111), 9 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:26:37,851 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:26:37,851 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:26:37,851 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-27 20:26:37,851 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:26:37,851 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:26:37,851 INFO L85 PathProgramCache]: Analyzing trace with hash -1900444235, now seen corresponding path program 2 times [2024-06-27 20:26:37,852 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:26:37,852 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [118243202] [2024-06-27 20:26:37,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:26:37,852 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:26:37,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:26:38,472 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:26:38,472 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:26:38,472 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [118243202] [2024-06-27 20:26:38,473 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [118243202] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:26:38,473 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:26:38,473 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 20:26:38,473 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1291613661] [2024-06-27 20:26:38,473 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:26:38,473 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 20:26:38,473 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:26:38,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 20:26:38,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-27 20:26:38,534 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-27 20:26:38,534 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 89 transitions, 750 flow. Second operand has 7 states, 7 states have (on average 12.857142857142858) internal successors, (90), 7 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:26:38,534 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:26:38,534 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-27 20:26:38,534 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:26:38,842 INFO L124 PetriNetUnfolderBase]: 1666/2684 cut-off events. [2024-06-27 20:26:38,842 INFO L125 PetriNetUnfolderBase]: For 33110/33117 co-relation queries the response was YES. [2024-06-27 20:26:38,849 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12821 conditions, 2684 events. 1666/2684 cut-off events. For 33110/33117 co-relation queries the response was YES. Maximal size of possible extension queue 137. Compared 14312 event pairs, 548 based on Foata normal form. 7/2688 useless extension candidates. Maximal degree in co-relation 12783. Up to 2484 conditions per place. [2024-06-27 20:26:38,856 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 78 selfloop transitions, 16 changer transitions 0/101 dead transitions. [2024-06-27 20:26:38,856 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 101 transitions, 998 flow [2024-06-27 20:26:38,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 20:26:38,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 20:26:38,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 113 transitions. [2024-06-27 20:26:38,857 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44841269841269843 [2024-06-27 20:26:38,857 INFO L175 Difference]: Start difference. First operand has 91 places, 89 transitions, 750 flow. Second operand 6 states and 113 transitions. [2024-06-27 20:26:38,857 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 101 transitions, 998 flow [2024-06-27 20:26:38,881 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 101 transitions, 908 flow, removed 12 selfloop flow, removed 5 redundant places. [2024-06-27 20:26:38,882 INFO L231 Difference]: Finished difference. Result has 92 places, 92 transitions, 742 flow [2024-06-27 20:26:38,882 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=660, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=89, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=742, PETRI_PLACES=92, PETRI_TRANSITIONS=92} [2024-06-27 20:26:38,883 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 49 predicate places. [2024-06-27 20:26:38,883 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 92 transitions, 742 flow [2024-06-27 20:26:38,883 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.857142857142858) internal successors, (90), 7 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:26:38,883 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:26:38,883 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:26:38,883 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-27 20:26:38,884 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:26:38,884 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:26:38,884 INFO L85 PathProgramCache]: Analyzing trace with hash -1906152203, now seen corresponding path program 1 times [2024-06-27 20:26:38,885 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:26:38,885 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1402072932] [2024-06-27 20:26:38,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:26:38,885 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:26:38,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:26:39,481 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:26:39,481 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:26:39,481 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1402072932] [2024-06-27 20:26:39,482 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1402072932] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:26:39,482 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:26:39,482 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 20:26:39,482 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1657323859] [2024-06-27 20:26:39,482 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:26:39,482 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 20:26:39,482 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:26:39,483 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 20:26:39,483 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 20:26:39,554 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-27 20:26:39,554 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 92 transitions, 742 flow. Second operand has 7 states, 7 states have (on average 13.857142857142858) internal successors, (97), 7 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) [2024-06-27 20:26:39,554 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:26:39,554 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-27 20:26:39,554 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:26:39,875 INFO L124 PetriNetUnfolderBase]: 1506/2503 cut-off events. [2024-06-27 20:26:39,875 INFO L125 PetriNetUnfolderBase]: For 31762/31762 co-relation queries the response was YES. [2024-06-27 20:26:39,882 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11859 conditions, 2503 events. 1506/2503 cut-off events. For 31762/31762 co-relation queries the response was YES. Maximal size of possible extension queue 130. Compared 13700 event pairs, 473 based on Foata normal form. 2/2503 useless extension candidates. Maximal degree in co-relation 11820. Up to 2262 conditions per place. [2024-06-27 20:26:39,889 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 89 selfloop transitions, 11 changer transitions 0/108 dead transitions. [2024-06-27 20:26:39,889 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 108 transitions, 1002 flow [2024-06-27 20:26:39,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 20:26:39,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 20:26:39,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 120 transitions. [2024-06-27 20:26:39,890 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47619047619047616 [2024-06-27 20:26:39,890 INFO L175 Difference]: Start difference. First operand has 92 places, 92 transitions, 742 flow. Second operand 6 states and 120 transitions. [2024-06-27 20:26:39,890 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 108 transitions, 1002 flow [2024-06-27 20:26:39,953 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 108 transitions, 942 flow, removed 16 selfloop flow, removed 4 redundant places. [2024-06-27 20:26:39,955 INFO L231 Difference]: Finished difference. Result has 94 places, 95 transitions, 740 flow [2024-06-27 20:26:39,955 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=682, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=92, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=740, PETRI_PLACES=94, PETRI_TRANSITIONS=95} [2024-06-27 20:26:39,955 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 51 predicate places. [2024-06-27 20:26:39,955 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 95 transitions, 740 flow [2024-06-27 20:26:39,955 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.857142857142858) internal successors, (97), 7 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) [2024-06-27 20:26:39,956 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:26:39,956 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:26:39,956 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-27 20:26:39,956 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:26:39,956 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:26:39,956 INFO L85 PathProgramCache]: Analyzing trace with hash -1900438283, now seen corresponding path program 2 times [2024-06-27 20:26:39,956 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:26:39,957 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [63594064] [2024-06-27 20:26:39,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:26:39,957 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:26:39,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:26:40,538 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:26:40,539 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:26:40,539 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [63594064] [2024-06-27 20:26:40,539 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [63594064] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:26:40,539 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:26:40,539 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 20:26:40,539 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1531855806] [2024-06-27 20:26:40,539 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:26:40,539 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 20:26:40,539 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:26:40,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 20:26:40,540 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-27 20:26:40,601 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-27 20:26:40,602 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 95 transitions, 740 flow. Second operand has 7 states, 7 states have (on average 13.857142857142858) internal successors, (97), 7 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) [2024-06-27 20:26:40,602 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:26:40,602 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-27 20:26:40,602 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:26:40,960 INFO L124 PetriNetUnfolderBase]: 1508/2509 cut-off events. [2024-06-27 20:26:40,960 INFO L125 PetriNetUnfolderBase]: For 34798/34801 co-relation queries the response was YES. [2024-06-27 20:26:40,968 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12272 conditions, 2509 events. 1508/2509 cut-off events. For 34798/34801 co-relation queries the response was YES. Maximal size of possible extension queue 130. Compared 13756 event pairs, 477 based on Foata normal form. 4/2510 useless extension candidates. Maximal degree in co-relation 12232. Up to 2256 conditions per place. [2024-06-27 20:26:40,975 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 85 selfloop transitions, 16 changer transitions 0/109 dead transitions. [2024-06-27 20:26:40,975 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 109 transitions, 1006 flow [2024-06-27 20:26:40,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 20:26:40,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 20:26:40,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 120 transitions. [2024-06-27 20:26:40,977 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47619047619047616 [2024-06-27 20:26:40,977 INFO L175 Difference]: Start difference. First operand has 94 places, 95 transitions, 740 flow. Second operand 6 states and 120 transitions. [2024-06-27 20:26:40,977 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 109 transitions, 1006 flow [2024-06-27 20:26:40,996 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 109 transitions, 970 flow, removed 9 selfloop flow, removed 4 redundant places. [2024-06-27 20:26:40,998 INFO L231 Difference]: Finished difference. Result has 96 places, 98 transitions, 778 flow [2024-06-27 20:26:40,998 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=704, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=95, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=778, PETRI_PLACES=96, PETRI_TRANSITIONS=98} [2024-06-27 20:26:40,999 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 53 predicate places. [2024-06-27 20:26:40,999 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 98 transitions, 778 flow [2024-06-27 20:26:40,999 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.857142857142858) internal successors, (97), 7 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) [2024-06-27 20:26:40,999 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:26:40,999 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:26:40,999 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-27 20:26:41,000 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:26:41,000 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:26:41,000 INFO L85 PathProgramCache]: Analyzing trace with hash -1900430347, now seen corresponding path program 1 times [2024-06-27 20:26:41,000 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:26:41,000 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1875815405] [2024-06-27 20:26:41,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:26:41,000 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:26:41,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:26:41,603 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:26:41,604 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:26:41,604 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1875815405] [2024-06-27 20:26:41,604 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1875815405] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:26:41,604 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:26:41,604 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:26:41,604 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1323100811] [2024-06-27 20:26:41,604 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:26:41,605 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:26:41,605 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:26:41,606 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:26:41,606 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:26:41,709 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-27 20:26:41,710 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 98 transitions, 778 flow. Second operand has 8 states, 8 states have (on average 12.75) internal successors, (102), 8 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:26:41,710 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:26:41,710 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-27 20:26:41,710 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:26:42,019 INFO L124 PetriNetUnfolderBase]: 1590/2589 cut-off events. [2024-06-27 20:26:42,020 INFO L125 PetriNetUnfolderBase]: For 37624/37624 co-relation queries the response was YES. [2024-06-27 20:26:42,026 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13028 conditions, 2589 events. 1590/2589 cut-off events. For 37624/37624 co-relation queries the response was YES. Maximal size of possible extension queue 131. Compared 13870 event pairs, 500 based on Foata normal form. 1/2588 useless extension candidates. Maximal degree in co-relation 12987. Up to 2426 conditions per place. [2024-06-27 20:26:42,033 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 91 selfloop transitions, 14 changer transitions 0/111 dead transitions. [2024-06-27 20:26:42,033 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 111 transitions, 1048 flow [2024-06-27 20:26:42,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:26:42,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:26:42,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 126 transitions. [2024-06-27 20:26:42,034 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-27 20:26:42,034 INFO L175 Difference]: Start difference. First operand has 96 places, 98 transitions, 778 flow. Second operand 7 states and 126 transitions. [2024-06-27 20:26:42,034 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 111 transitions, 1048 flow [2024-06-27 20:26:42,058 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 111 transitions, 996 flow, removed 12 selfloop flow, removed 4 redundant places. [2024-06-27 20:26:42,059 INFO L231 Difference]: Finished difference. Result has 99 places, 101 transitions, 802 flow [2024-06-27 20:26:42,059 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=726, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=98, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=802, PETRI_PLACES=99, PETRI_TRANSITIONS=101} [2024-06-27 20:26:42,060 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 56 predicate places. [2024-06-27 20:26:42,060 INFO L495 AbstractCegarLoop]: Abstraction has has 99 places, 101 transitions, 802 flow [2024-06-27 20:26:42,060 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.75) internal successors, (102), 8 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:26:42,060 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:26:42,060 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:26:42,060 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-27 20:26:42,060 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:26:42,060 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:26:42,060 INFO L85 PathProgramCache]: Analyzing trace with hash 1199634223, now seen corresponding path program 1 times [2024-06-27 20:26:42,060 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:26:42,060 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1620929503] [2024-06-27 20:26:42,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:26:42,061 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:26:42,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:26:42,640 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:26:42,640 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:26:42,641 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1620929503] [2024-06-27 20:26:42,641 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1620929503] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:26:42,641 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:26:42,641 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:26:42,641 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1848600638] [2024-06-27 20:26:42,641 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:26:42,641 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:26:42,642 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:26:42,642 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:26:42,642 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:26:42,729 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-27 20:26:42,729 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 101 transitions, 802 flow. Second operand has 8 states, 8 states have (on average 12.75) internal successors, (102), 8 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:26:42,729 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:26:42,729 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-27 20:26:42,729 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:26:43,197 INFO L124 PetriNetUnfolderBase]: 1687/2721 cut-off events. [2024-06-27 20:26:43,197 INFO L125 PetriNetUnfolderBase]: For 48380/48383 co-relation queries the response was YES. [2024-06-27 20:26:43,205 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14454 conditions, 2721 events. 1687/2721 cut-off events. For 48380/48383 co-relation queries the response was YES. Maximal size of possible extension queue 139. Compared 14525 event pairs, 536 based on Foata normal form. 5/2723 useless extension candidates. Maximal degree in co-relation 14412. Up to 2449 conditions per place. [2024-06-27 20:26:43,270 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 100 selfloop transitions, 24 changer transitions 0/131 dead transitions. [2024-06-27 20:26:43,271 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 131 transitions, 1176 flow [2024-06-27 20:26:43,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:26:43,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:26:43,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 144 transitions. [2024-06-27 20:26:43,273 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4897959183673469 [2024-06-27 20:26:43,273 INFO L175 Difference]: Start difference. First operand has 99 places, 101 transitions, 802 flow. Second operand 7 states and 144 transitions. [2024-06-27 20:26:43,273 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 131 transitions, 1176 flow [2024-06-27 20:26:43,294 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 131 transitions, 1122 flow, removed 15 selfloop flow, removed 5 redundant places. [2024-06-27 20:26:43,296 INFO L231 Difference]: Finished difference. Result has 102 places, 108 transitions, 888 flow [2024-06-27 20:26:43,296 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=748, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=101, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=888, PETRI_PLACES=102, PETRI_TRANSITIONS=108} [2024-06-27 20:26:43,296 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 59 predicate places. [2024-06-27 20:26:43,297 INFO L495 AbstractCegarLoop]: Abstraction has has 102 places, 108 transitions, 888 flow [2024-06-27 20:26:43,297 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.75) internal successors, (102), 8 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:26:43,297 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:26:43,297 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:26:43,297 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-27 20:26:43,297 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:26:43,298 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:26:43,298 INFO L85 PathProgramCache]: Analyzing trace with hash 2119238666, now seen corresponding path program 1 times [2024-06-27 20:26:43,298 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:26:43,298 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1132392834] [2024-06-27 20:26:43,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:26:43,298 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:26:43,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:26:44,188 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:26:44,188 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:26:44,188 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1132392834] [2024-06-27 20:26:44,188 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1132392834] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:26:44,189 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:26:44,189 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:26:44,189 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1871920508] [2024-06-27 20:26:44,189 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:26:44,189 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:26:44,189 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:26:44,190 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:26:44,190 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:26:44,283 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-27 20:26:44,284 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 108 transitions, 888 flow. Second operand has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:26:44,284 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:26:44,284 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-27 20:26:44,284 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:26:44,791 INFO L124 PetriNetUnfolderBase]: 1797/2920 cut-off events. [2024-06-27 20:26:44,791 INFO L125 PetriNetUnfolderBase]: For 55297/55297 co-relation queries the response was YES. [2024-06-27 20:26:44,799 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15968 conditions, 2920 events. 1797/2920 cut-off events. For 55297/55297 co-relation queries the response was YES. Maximal size of possible extension queue 158. Compared 16082 event pairs, 546 based on Foata normal form. 12/2927 useless extension candidates. Maximal degree in co-relation 15924. Up to 2271 conditions per place. [2024-06-27 20:26:44,808 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 102 selfloop transitions, 37 changer transitions 0/146 dead transitions. [2024-06-27 20:26:44,808 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 146 transitions, 1316 flow [2024-06-27 20:26:44,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:26:44,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:26:44,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 167 transitions. [2024-06-27 20:26:44,809 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49702380952380953 [2024-06-27 20:26:44,809 INFO L175 Difference]: Start difference. First operand has 102 places, 108 transitions, 888 flow. Second operand 8 states and 167 transitions. [2024-06-27 20:26:44,809 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 146 transitions, 1316 flow [2024-06-27 20:26:44,838 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 146 transitions, 1246 flow, removed 21 selfloop flow, removed 4 redundant places. [2024-06-27 20:26:44,839 INFO L231 Difference]: Finished difference. Result has 107 places, 113 transitions, 967 flow [2024-06-27 20:26:44,839 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=818, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=108, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=967, PETRI_PLACES=107, PETRI_TRANSITIONS=113} [2024-06-27 20:26:44,840 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 64 predicate places. [2024-06-27 20:26:44,840 INFO L495 AbstractCegarLoop]: Abstraction has has 107 places, 113 transitions, 967 flow [2024-06-27 20:26:44,840 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:26:44,840 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:26:44,840 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:26:44,840 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-27 20:26:44,840 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:26:44,840 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:26:44,840 INFO L85 PathProgramCache]: Analyzing trace with hash 861508385, now seen corresponding path program 2 times [2024-06-27 20:26:44,840 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:26:44,841 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1683957360] [2024-06-27 20:26:44,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:26:44,841 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:26:44,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:26:45,433 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:26:45,433 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:26:45,433 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1683957360] [2024-06-27 20:26:45,433 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1683957360] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:26:45,433 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:26:45,433 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:26:45,434 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [60269308] [2024-06-27 20:26:45,434 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:26:45,434 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:26:45,434 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:26:45,434 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:26:45,434 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:26:45,520 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-27 20:26:45,520 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 113 transitions, 967 flow. Second operand has 8 states, 8 states have (on average 12.75) internal successors, (102), 8 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:26:45,520 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:26:45,520 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-27 20:26:45,520 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:26:45,966 INFO L124 PetriNetUnfolderBase]: 1848/3006 cut-off events. [2024-06-27 20:26:45,966 INFO L125 PetriNetUnfolderBase]: For 60053/60056 co-relation queries the response was YES. [2024-06-27 20:26:45,973 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16845 conditions, 3006 events. 1848/3006 cut-off events. For 60053/60056 co-relation queries the response was YES. Maximal size of possible extension queue 168. Compared 16686 event pairs, 562 based on Foata normal form. 5/3008 useless extension candidates. Maximal degree in co-relation 16800. Up to 2662 conditions per place. [2024-06-27 20:26:45,981 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 104 selfloop transitions, 29 changer transitions 0/140 dead transitions. [2024-06-27 20:26:45,981 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 140 transitions, 1435 flow [2024-06-27 20:26:45,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:26:45,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:26:45,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 141 transitions. [2024-06-27 20:26:45,982 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47959183673469385 [2024-06-27 20:26:45,982 INFO L175 Difference]: Start difference. First operand has 107 places, 113 transitions, 967 flow. Second operand 7 states and 141 transitions. [2024-06-27 20:26:45,982 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 140 transitions, 1435 flow [2024-06-27 20:26:46,015 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 140 transitions, 1384 flow, removed 9 selfloop flow, removed 3 redundant places. [2024-06-27 20:26:46,018 INFO L231 Difference]: Finished difference. Result has 112 places, 121 transitions, 1106 flow [2024-06-27 20:26:46,018 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=916, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=113, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1106, PETRI_PLACES=112, PETRI_TRANSITIONS=121} [2024-06-27 20:26:46,018 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 69 predicate places. [2024-06-27 20:26:46,018 INFO L495 AbstractCegarLoop]: Abstraction has has 112 places, 121 transitions, 1106 flow [2024-06-27 20:26:46,018 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.75) internal successors, (102), 8 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:26:46,018 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:26:46,019 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:26:46,019 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-27 20:26:46,019 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:26:46,021 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:26:46,021 INFO L85 PathProgramCache]: Analyzing trace with hash 861508757, now seen corresponding path program 1 times [2024-06-27 20:26:46,021 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:26:46,022 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [850853791] [2024-06-27 20:26:46,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:26:46,022 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:26:46,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:26:46,537 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:26:46,537 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:26:46,537 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [850853791] [2024-06-27 20:26:46,537 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [850853791] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:26:46,537 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:26:46,537 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:26:46,537 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1353706501] [2024-06-27 20:26:46,537 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:26:46,538 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:26:46,538 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:26:46,539 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:26:46,539 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:26:46,614 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-27 20:26:46,614 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 112 places, 121 transitions, 1106 flow. Second operand has 8 states, 8 states have (on average 11.75) internal successors, (94), 8 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:26:46,615 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:26:46,618 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-27 20:26:46,618 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:26:47,037 INFO L124 PetriNetUnfolderBase]: 1938/3097 cut-off events. [2024-06-27 20:26:47,037 INFO L125 PetriNetUnfolderBase]: For 66540/66540 co-relation queries the response was YES. [2024-06-27 20:26:47,047 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18086 conditions, 3097 events. 1938/3097 cut-off events. For 66540/66540 co-relation queries the response was YES. Maximal size of possible extension queue 169. Compared 16858 event pairs, 590 based on Foata normal form. 1/3096 useless extension candidates. Maximal degree in co-relation 18039. Up to 2939 conditions per place. [2024-06-27 20:26:47,056 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 121 selfloop transitions, 14 changer transitions 0/140 dead transitions. [2024-06-27 20:26:47,056 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 140 transitions, 1464 flow [2024-06-27 20:26:47,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:26:47,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:26:47,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 126 transitions. [2024-06-27 20:26:47,057 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-27 20:26:47,057 INFO L175 Difference]: Start difference. First operand has 112 places, 121 transitions, 1106 flow. Second operand 7 states and 126 transitions. [2024-06-27 20:26:47,057 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 140 transitions, 1464 flow [2024-06-27 20:26:47,110 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 140 transitions, 1395 flow, removed 25 selfloop flow, removed 3 redundant places. [2024-06-27 20:26:47,112 INFO L231 Difference]: Finished difference. Result has 116 places, 124 transitions, 1125 flow [2024-06-27 20:26:47,112 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1037, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=121, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=107, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1125, PETRI_PLACES=116, PETRI_TRANSITIONS=124} [2024-06-27 20:26:47,112 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 73 predicate places. [2024-06-27 20:26:47,112 INFO L495 AbstractCegarLoop]: Abstraction has has 116 places, 124 transitions, 1125 flow [2024-06-27 20:26:47,112 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.75) internal successors, (94), 8 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:26:47,113 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:26:47,113 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:26:47,113 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-27 20:26:47,113 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:26:47,113 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:26:47,113 INFO L85 PathProgramCache]: Analyzing trace with hash 864197924, now seen corresponding path program 2 times [2024-06-27 20:26:47,113 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:26:47,113 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [162395229] [2024-06-27 20:26:47,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:26:47,114 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:26:47,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:26:47,944 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:26:47,944 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:26:47,944 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [162395229] [2024-06-27 20:26:47,945 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [162395229] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:26:47,945 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:26:47,945 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:26:47,945 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [459109027] [2024-06-27 20:26:47,945 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:26:47,946 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:26:47,946 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:26:47,946 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:26:47,947 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:26:48,029 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-27 20:26:48,029 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 124 transitions, 1125 flow. Second operand has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:26:48,029 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:26:48,030 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-27 20:26:48,030 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:26:48,605 INFO L124 PetriNetUnfolderBase]: 1843/2990 cut-off events. [2024-06-27 20:26:48,605 INFO L125 PetriNetUnfolderBase]: For 71779/71779 co-relation queries the response was YES. [2024-06-27 20:26:48,615 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17758 conditions, 2990 events. 1843/2990 cut-off events. For 71779/71779 co-relation queries the response was YES. Maximal size of possible extension queue 166. Compared 16457 event pairs, 347 based on Foata normal form. 12/2997 useless extension candidates. Maximal degree in co-relation 17709. Up to 1909 conditions per place. [2024-06-27 20:26:48,626 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 106 selfloop transitions, 40 changer transitions 0/154 dead transitions. [2024-06-27 20:26:48,626 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 122 places, 154 transitions, 1517 flow [2024-06-27 20:26:48,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:26:48,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:26:48,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 150 transitions. [2024-06-27 20:26:48,627 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5102040816326531 [2024-06-27 20:26:48,627 INFO L175 Difference]: Start difference. First operand has 116 places, 124 transitions, 1125 flow. Second operand 7 states and 150 transitions. [2024-06-27 20:26:48,627 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 122 places, 154 transitions, 1517 flow [2024-06-27 20:26:48,669 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 154 transitions, 1445 flow, removed 24 selfloop flow, removed 5 redundant places. [2024-06-27 20:26:48,671 INFO L231 Difference]: Finished difference. Result has 118 places, 124 transitions, 1142 flow [2024-06-27 20:26:48,671 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1053, PETRI_DIFFERENCE_MINUEND_PLACES=111, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=124, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1142, PETRI_PLACES=118, PETRI_TRANSITIONS=124} [2024-06-27 20:26:48,672 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 75 predicate places. [2024-06-27 20:26:48,672 INFO L495 AbstractCegarLoop]: Abstraction has has 118 places, 124 transitions, 1142 flow [2024-06-27 20:26:48,672 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:26:48,672 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:26:48,672 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:26:48,673 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-27 20:26:48,673 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:26:48,673 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:26:48,673 INFO L85 PathProgramCache]: Analyzing trace with hash -566830356, now seen corresponding path program 3 times [2024-06-27 20:26:48,673 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:26:48,673 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1127351223] [2024-06-27 20:26:48,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:26:48,673 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:26:48,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:26:49,516 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:26:49,516 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:26:49,516 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1127351223] [2024-06-27 20:26:49,516 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1127351223] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:26:49,516 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:26:49,517 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:26:49,517 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [763290010] [2024-06-27 20:26:49,517 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:26:49,518 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:26:49,518 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:26:49,518 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:26:49,518 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:26:49,616 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-27 20:26:49,616 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 124 transitions, 1142 flow. Second operand has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:26:49,616 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:26:49,617 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-27 20:26:49,617 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:26:50,066 INFO L124 PetriNetUnfolderBase]: 1823/2959 cut-off events. [2024-06-27 20:26:50,067 INFO L125 PetriNetUnfolderBase]: For 74627/74631 co-relation queries the response was YES. [2024-06-27 20:26:50,077 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17763 conditions, 2959 events. 1823/2959 cut-off events. For 74627/74631 co-relation queries the response was YES. Maximal size of possible extension queue 164. Compared 16268 event pairs, 310 based on Foata normal form. 13/2962 useless extension candidates. Maximal degree in co-relation 17713. Up to 1767 conditions per place. [2024-06-27 20:26:50,087 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 101 selfloop transitions, 39 changer transitions 0/148 dead transitions. [2024-06-27 20:26:50,087 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 148 transitions, 1476 flow [2024-06-27 20:26:50,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:26:50,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:26:50,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 142 transitions. [2024-06-27 20:26:50,088 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48299319727891155 [2024-06-27 20:26:50,089 INFO L175 Difference]: Start difference. First operand has 118 places, 124 transitions, 1142 flow. Second operand 7 states and 142 transitions. [2024-06-27 20:26:50,089 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 148 transitions, 1476 flow [2024-06-27 20:26:50,124 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 148 transitions, 1372 flow, removed 5 selfloop flow, removed 6 redundant places. [2024-06-27 20:26:50,126 INFO L231 Difference]: Finished difference. Result has 118 places, 123 transitions, 1088 flow [2024-06-27 20:26:50,126 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1006, PETRI_DIFFERENCE_MINUEND_PLACES=111, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=123, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1088, PETRI_PLACES=118, PETRI_TRANSITIONS=123} [2024-06-27 20:26:50,127 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 75 predicate places. [2024-06-27 20:26:50,127 INFO L495 AbstractCegarLoop]: Abstraction has has 118 places, 123 transitions, 1088 flow [2024-06-27 20:26:50,127 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:26:50,127 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:26:50,127 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:26:50,127 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-27 20:26:50,127 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:26:50,128 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:26:50,128 INFO L85 PathProgramCache]: Analyzing trace with hash 1216187507, now seen corresponding path program 2 times [2024-06-27 20:26:50,128 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:26:50,128 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [708733034] [2024-06-27 20:26:50,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:26:50,128 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:26:50,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:26:50,731 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:26:50,731 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:26:50,732 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [708733034] [2024-06-27 20:26:50,732 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [708733034] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:26:50,732 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:26:50,732 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:26:50,732 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1229787279] [2024-06-27 20:26:50,732 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:26:50,732 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:26:50,733 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:26:50,733 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:26:50,733 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:26:50,815 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-27 20:26:50,815 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 123 transitions, 1088 flow. Second operand has 8 states, 8 states have (on average 11.75) internal successors, (94), 8 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:26:50,815 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:26:50,815 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-27 20:26:50,815 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:26:51,216 INFO L124 PetriNetUnfolderBase]: 1903/3042 cut-off events. [2024-06-27 20:26:51,216 INFO L125 PetriNetUnfolderBase]: For 71063/71073 co-relation queries the response was YES. [2024-06-27 20:26:51,226 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18086 conditions, 3042 events. 1903/3042 cut-off events. For 71063/71073 co-relation queries the response was YES. Maximal size of possible extension queue 165. Compared 16446 event pairs, 569 based on Foata normal form. 9/3048 useless extension candidates. Maximal degree in co-relation 18035. Up to 2866 conditions per place. [2024-06-27 20:26:51,238 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 108 selfloop transitions, 27 changer transitions 0/140 dead transitions. [2024-06-27 20:26:51,238 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 124 places, 140 transitions, 1542 flow [2024-06-27 20:26:51,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:26:51,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:26:51,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 123 transitions. [2024-06-27 20:26:51,239 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41836734693877553 [2024-06-27 20:26:51,239 INFO L175 Difference]: Start difference. First operand has 118 places, 123 transitions, 1088 flow. Second operand 7 states and 123 transitions. [2024-06-27 20:26:51,239 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 124 places, 140 transitions, 1542 flow [2024-06-27 20:26:51,285 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 118 places, 140 transitions, 1431 flow, removed 6 selfloop flow, removed 6 redundant places. [2024-06-27 20:26:51,287 INFO L231 Difference]: Finished difference. Result has 119 places, 129 transitions, 1151 flow [2024-06-27 20:26:51,287 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=977, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=123, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=99, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1151, PETRI_PLACES=119, PETRI_TRANSITIONS=129} [2024-06-27 20:26:51,288 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 76 predicate places. [2024-06-27 20:26:51,288 INFO L495 AbstractCegarLoop]: Abstraction has has 119 places, 129 transitions, 1151 flow [2024-06-27 20:26:51,288 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.75) internal successors, (94), 8 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:26:51,288 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:26:51,289 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:26:51,289 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-27 20:26:51,289 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:26:51,289 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:26:51,289 INFO L85 PathProgramCache]: Analyzing trace with hash 1215771425, now seen corresponding path program 3 times [2024-06-27 20:26:51,289 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:26:51,290 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2055006123] [2024-06-27 20:26:51,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:26:51,290 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:26:51,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:26:52,023 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:26:52,023 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:26:52,024 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2055006123] [2024-06-27 20:26:52,024 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2055006123] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:26:52,024 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:26:52,024 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:26:52,024 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2073531441] [2024-06-27 20:26:52,024 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:26:52,025 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:26:52,025 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:26:52,025 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:26:52,025 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:26:52,100 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-27 20:26:52,100 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 129 transitions, 1151 flow. Second operand has 8 states, 8 states have (on average 12.75) internal successors, (102), 8 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:26:52,100 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:26:52,100 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-27 20:26:52,100 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:26:52,519 INFO L124 PetriNetUnfolderBase]: 1855/3011 cut-off events. [2024-06-27 20:26:52,519 INFO L125 PetriNetUnfolderBase]: For 77983/77990 co-relation queries the response was YES. [2024-06-27 20:26:52,529 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18047 conditions, 3011 events. 1855/3011 cut-off events. For 77983/77990 co-relation queries the response was YES. Maximal size of possible extension queue 170. Compared 16649 event pairs, 566 based on Foata normal form. 6/3009 useless extension candidates. Maximal degree in co-relation 17996. Up to 2598 conditions per place. [2024-06-27 20:26:52,539 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 100 selfloop transitions, 42 changer transitions 0/152 dead transitions. [2024-06-27 20:26:52,540 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 125 places, 152 transitions, 1715 flow [2024-06-27 20:26:52,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:26:52,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:26:52,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 139 transitions. [2024-06-27 20:26:52,541 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47278911564625853 [2024-06-27 20:26:52,541 INFO L175 Difference]: Start difference. First operand has 119 places, 129 transitions, 1151 flow. Second operand 7 states and 139 transitions. [2024-06-27 20:26:52,541 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 125 places, 152 transitions, 1715 flow [2024-06-27 20:26:52,583 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 152 transitions, 1645 flow, removed 26 selfloop flow, removed 3 redundant places. [2024-06-27 20:26:52,585 INFO L231 Difference]: Finished difference. Result has 124 places, 137 transitions, 1317 flow [2024-06-27 20:26:52,585 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1081, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=129, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1317, PETRI_PLACES=124, PETRI_TRANSITIONS=137} [2024-06-27 20:26:52,586 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 81 predicate places. [2024-06-27 20:26:52,586 INFO L495 AbstractCegarLoop]: Abstraction has has 124 places, 137 transitions, 1317 flow [2024-06-27 20:26:52,586 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.75) internal successors, (102), 8 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:26:52,586 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:26:52,586 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:26:52,586 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-27 20:26:52,586 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:26:52,587 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:26:52,587 INFO L85 PathProgramCache]: Analyzing trace with hash 1215771797, now seen corresponding path program 3 times [2024-06-27 20:26:52,587 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:26:52,587 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1961555515] [2024-06-27 20:26:52,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:26:52,587 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:26:52,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:26:53,165 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:26:53,165 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:26:53,165 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1961555515] [2024-06-27 20:26:53,165 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1961555515] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:26:53,165 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:26:53,165 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:26:53,165 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [130949533] [2024-06-27 20:26:53,165 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:26:53,166 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:26:53,166 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:26:53,166 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:26:53,166 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:26:53,239 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-27 20:26:53,239 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 124 places, 137 transitions, 1317 flow. Second operand has 8 states, 8 states have (on average 11.75) internal successors, (94), 8 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:26:53,240 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:26:53,240 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-27 20:26:53,240 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:26:53,667 INFO L124 PetriNetUnfolderBase]: 1927/3082 cut-off events. [2024-06-27 20:26:53,667 INFO L125 PetriNetUnfolderBase]: For 84584/84594 co-relation queries the response was YES. [2024-06-27 20:26:53,678 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19247 conditions, 3082 events. 1927/3082 cut-off events. For 84584/84594 co-relation queries the response was YES. Maximal size of possible extension queue 171. Compared 16727 event pairs, 575 based on Foata normal form. 9/3088 useless extension candidates. Maximal degree in co-relation 19193. Up to 2901 conditions per place. [2024-06-27 20:26:53,708 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 116 selfloop transitions, 26 changer transitions 0/147 dead transitions. [2024-06-27 20:26:53,708 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 130 places, 147 transitions, 1625 flow [2024-06-27 20:26:53,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:26:53,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:26:53,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 123 transitions. [2024-06-27 20:26:53,709 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41836734693877553 [2024-06-27 20:26:53,709 INFO L175 Difference]: Start difference. First operand has 124 places, 137 transitions, 1317 flow. Second operand 7 states and 123 transitions. [2024-06-27 20:26:53,709 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 130 places, 147 transitions, 1625 flow [2024-06-27 20:26:53,762 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 126 places, 147 transitions, 1457 flow, removed 55 selfloop flow, removed 4 redundant places. [2024-06-27 20:26:53,764 INFO L231 Difference]: Finished difference. Result has 127 places, 137 transitions, 1207 flow [2024-06-27 20:26:53,764 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1149, PETRI_DIFFERENCE_MINUEND_PLACES=120, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=137, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=111, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1207, PETRI_PLACES=127, PETRI_TRANSITIONS=137} [2024-06-27 20:26:53,766 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 84 predicate places. [2024-06-27 20:26:53,766 INFO L495 AbstractCegarLoop]: Abstraction has has 127 places, 137 transitions, 1207 flow [2024-06-27 20:26:53,766 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.75) internal successors, (94), 8 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:26:53,767 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:26:53,767 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:26:53,767 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-27 20:26:53,767 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:26:53,767 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:26:53,767 INFO L85 PathProgramCache]: Analyzing trace with hash 1038819953, now seen corresponding path program 1 times [2024-06-27 20:26:53,767 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:26:53,768 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2137818691] [2024-06-27 20:26:53,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:26:53,768 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:26:53,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:26:54,568 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:26:54,568 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:26:54,568 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2137818691] [2024-06-27 20:26:54,568 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2137818691] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:26:54,568 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:26:54,568 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:26:54,569 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1571786999] [2024-06-27 20:26:54,569 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:26:54,569 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:26:54,569 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:26:54,569 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:26:54,570 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:26:54,646 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-27 20:26:54,647 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 127 places, 137 transitions, 1207 flow. Second operand has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:26:54,647 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:26:54,648 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-27 20:26:54,648 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:26:55,032 INFO L124 PetriNetUnfolderBase]: 1663/2809 cut-off events. [2024-06-27 20:26:55,032 INFO L125 PetriNetUnfolderBase]: For 75190/75190 co-relation queries the response was YES. [2024-06-27 20:26:55,043 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16624 conditions, 2809 events. 1663/2809 cut-off events. For 75190/75190 co-relation queries the response was YES. Maximal size of possible extension queue 163. Compared 16064 event pairs, 459 based on Foata normal form. 1/2808 useless extension candidates. Maximal degree in co-relation 16569. Up to 2500 conditions per place. [2024-06-27 20:26:55,052 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 131 selfloop transitions, 14 changer transitions 0/156 dead transitions. [2024-06-27 20:26:55,052 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 133 places, 156 transitions, 1583 flow [2024-06-27 20:26:55,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:26:55,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:26:55,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 137 transitions. [2024-06-27 20:26:55,053 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46598639455782315 [2024-06-27 20:26:55,053 INFO L175 Difference]: Start difference. First operand has 127 places, 137 transitions, 1207 flow. Second operand 7 states and 137 transitions. [2024-06-27 20:26:55,053 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 133 places, 156 transitions, 1583 flow [2024-06-27 20:26:55,099 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 127 places, 156 transitions, 1513 flow, removed 5 selfloop flow, removed 6 redundant places. [2024-06-27 20:26:55,101 INFO L231 Difference]: Finished difference. Result has 128 places, 140 transitions, 1223 flow [2024-06-27 20:26:55,101 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1137, PETRI_DIFFERENCE_MINUEND_PLACES=121, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=137, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=123, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1223, PETRI_PLACES=128, PETRI_TRANSITIONS=140} [2024-06-27 20:26:55,117 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 85 predicate places. [2024-06-27 20:26:55,117 INFO L495 AbstractCegarLoop]: Abstraction has has 128 places, 140 transitions, 1223 flow [2024-06-27 20:26:55,117 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:26:55,117 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:26:55,117 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:26:55,117 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-27 20:26:55,117 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:26:55,118 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:26:55,118 INFO L85 PathProgramCache]: Analyzing trace with hash 1038824789, now seen corresponding path program 1 times [2024-06-27 20:26:55,118 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:26:55,118 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [770288846] [2024-06-27 20:26:55,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:26:55,118 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:26:55,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:26:55,677 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:26:55,677 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:26:55,677 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [770288846] [2024-06-27 20:26:55,677 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [770288846] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:26:55,677 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:26:55,677 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:26:55,677 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1348074514] [2024-06-27 20:26:55,678 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:26:55,678 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:26:55,678 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:26:55,678 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:26:55,678 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:26:55,740 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-27 20:26:55,741 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 128 places, 140 transitions, 1223 flow. Second operand has 8 states, 8 states have (on average 12.75) internal successors, (102), 8 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:26:55,741 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:26:55,741 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-27 20:26:55,741 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:26:56,149 INFO L124 PetriNetUnfolderBase]: 1767/2919 cut-off events. [2024-06-27 20:26:56,149 INFO L125 PetriNetUnfolderBase]: For 80331/80331 co-relation queries the response was YES. [2024-06-27 20:26:56,160 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17522 conditions, 2919 events. 1767/2919 cut-off events. For 80331/80331 co-relation queries the response was YES. Maximal size of possible extension queue 165. Compared 16335 event pairs, 498 based on Foata normal form. 2/2919 useless extension candidates. Maximal degree in co-relation 17466. Up to 2683 conditions per place. [2024-06-27 20:26:56,171 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 138 selfloop transitions, 14 changer transitions 0/158 dead transitions. [2024-06-27 20:26:56,171 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 134 places, 158 transitions, 1617 flow [2024-06-27 20:26:56,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:26:56,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:26:56,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 130 transitions. [2024-06-27 20:26:56,172 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4421768707482993 [2024-06-27 20:26:56,172 INFO L175 Difference]: Start difference. First operand has 128 places, 140 transitions, 1223 flow. Second operand 7 states and 130 transitions. [2024-06-27 20:26:56,172 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 134 places, 158 transitions, 1617 flow [2024-06-27 20:26:56,218 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 129 places, 158 transitions, 1553 flow, removed 20 selfloop flow, removed 5 redundant places. [2024-06-27 20:26:56,220 INFO L231 Difference]: Finished difference. Result has 130 places, 143 transitions, 1241 flow [2024-06-27 20:26:56,220 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1159, PETRI_DIFFERENCE_MINUEND_PLACES=123, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=140, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=126, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1241, PETRI_PLACES=130, PETRI_TRANSITIONS=143} [2024-06-27 20:26:56,220 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 87 predicate places. [2024-06-27 20:26:56,220 INFO L495 AbstractCegarLoop]: Abstraction has has 130 places, 143 transitions, 1241 flow [2024-06-27 20:26:56,221 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.75) internal successors, (102), 8 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:26:56,221 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:26:56,221 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:26:56,221 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-27 20:26:56,221 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:26:56,221 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:26:56,221 INFO L85 PathProgramCache]: Analyzing trace with hash 1216193459, now seen corresponding path program 2 times [2024-06-27 20:26:56,222 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:26:56,222 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1095486837] [2024-06-27 20:26:56,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:26:56,222 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:26:56,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:26:56,828 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:26:56,828 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:26:56,828 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1095486837] [2024-06-27 20:26:56,828 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1095486837] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:26:56,828 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:26:56,829 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:26:56,829 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2049843793] [2024-06-27 20:26:56,829 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:26:56,829 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:26:56,829 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:26:56,830 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:26:56,830 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:26:56,901 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-27 20:26:56,901 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 130 places, 143 transitions, 1241 flow. Second operand has 8 states, 8 states have (on average 12.75) internal successors, (102), 8 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:26:56,901 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:26:56,901 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-27 20:26:56,901 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:26:57,281 INFO L124 PetriNetUnfolderBase]: 1785/2929 cut-off events. [2024-06-27 20:26:57,282 INFO L125 PetriNetUnfolderBase]: For 83823/83826 co-relation queries the response was YES. [2024-06-27 20:26:57,293 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18130 conditions, 2929 events. 1785/2929 cut-off events. For 83823/83826 co-relation queries the response was YES. Maximal size of possible extension queue 165. Compared 16272 event pairs, 502 based on Foata normal form. 4/2930 useless extension candidates. Maximal degree in co-relation 18073. Up to 2679 conditions per place. [2024-06-27 20:26:57,302 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 130 selfloop transitions, 27 changer transitions 0/163 dead transitions. [2024-06-27 20:26:57,303 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 136 places, 163 transitions, 1761 flow [2024-06-27 20:26:57,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:26:57,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:26:57,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 132 transitions. [2024-06-27 20:26:57,304 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4489795918367347 [2024-06-27 20:26:57,304 INFO L175 Difference]: Start difference. First operand has 130 places, 143 transitions, 1241 flow. Second operand 7 states and 132 transitions. [2024-06-27 20:26:57,304 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 136 places, 163 transitions, 1761 flow [2024-06-27 20:26:57,361 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 131 places, 163 transitions, 1701 flow, removed 18 selfloop flow, removed 5 redundant places. [2024-06-27 20:26:57,363 INFO L231 Difference]: Finished difference. Result has 132 places, 149 transitions, 1343 flow [2024-06-27 20:26:57,363 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1181, PETRI_DIFFERENCE_MINUEND_PLACES=125, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=143, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=119, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1343, PETRI_PLACES=132, PETRI_TRANSITIONS=149} [2024-06-27 20:26:57,364 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 89 predicate places. [2024-06-27 20:26:57,364 INFO L495 AbstractCegarLoop]: Abstraction has has 132 places, 149 transitions, 1343 flow [2024-06-27 20:26:57,364 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.75) internal successors, (102), 8 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:26:57,364 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:26:57,364 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:26:57,364 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-27 20:26:57,364 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:26:57,365 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:26:57,365 INFO L85 PathProgramCache]: Analyzing trace with hash 1215956309, now seen corresponding path program 3 times [2024-06-27 20:26:57,365 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:26:57,365 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [895748745] [2024-06-27 20:26:57,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:26:57,365 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:26:57,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:26:57,978 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:26:57,978 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:26:57,978 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [895748745] [2024-06-27 20:26:57,978 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [895748745] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:26:57,978 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:26:57,978 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:26:57,979 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1876367943] [2024-06-27 20:26:57,979 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:26:57,979 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:26:57,979 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:26:57,980 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:26:57,980 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:26:58,042 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-27 20:26:58,043 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 132 places, 149 transitions, 1343 flow. Second operand has 8 states, 8 states have (on average 12.75) internal successors, (102), 8 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:26:58,043 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:26:58,043 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-27 20:26:58,043 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:26:58,438 INFO L124 PetriNetUnfolderBase]: 1779/2923 cut-off events. [2024-06-27 20:26:58,438 INFO L125 PetriNetUnfolderBase]: For 88800/88803 co-relation queries the response was YES. [2024-06-27 20:26:58,449 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18430 conditions, 2923 events. 1779/2923 cut-off events. For 88800/88803 co-relation queries the response was YES. Maximal size of possible extension queue 165. Compared 16305 event pairs, 504 based on Foata normal form. 4/2924 useless extension candidates. Maximal degree in co-relation 18372. Up to 2674 conditions per place. [2024-06-27 20:26:58,458 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 130 selfloop transitions, 26 changer transitions 0/162 dead transitions. [2024-06-27 20:26:58,458 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 138 places, 162 transitions, 1703 flow [2024-06-27 20:26:58,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:26:58,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:26:58,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 132 transitions. [2024-06-27 20:26:58,459 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4489795918367347 [2024-06-27 20:26:58,460 INFO L175 Difference]: Start difference. First operand has 132 places, 149 transitions, 1343 flow. Second operand 7 states and 132 transitions. [2024-06-27 20:26:58,460 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 138 places, 162 transitions, 1703 flow [2024-06-27 20:26:58,521 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 135 places, 162 transitions, 1613 flow, removed 36 selfloop flow, removed 3 redundant places. [2024-06-27 20:26:58,523 INFO L231 Difference]: Finished difference. Result has 136 places, 149 transitions, 1311 flow [2024-06-27 20:26:58,524 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1253, PETRI_DIFFERENCE_MINUEND_PLACES=129, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=149, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=123, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1311, PETRI_PLACES=136, PETRI_TRANSITIONS=149} [2024-06-27 20:26:58,524 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 93 predicate places. [2024-06-27 20:26:58,524 INFO L495 AbstractCegarLoop]: Abstraction has has 136 places, 149 transitions, 1311 flow [2024-06-27 20:26:58,524 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.75) internal successors, (102), 8 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:26:58,524 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:26:58,524 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:26:58,524 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-27 20:26:58,525 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:26:58,526 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:26:58,526 INFO L85 PathProgramCache]: Analyzing trace with hash -1466043813, now seen corresponding path program 1 times [2024-06-27 20:26:58,526 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:26:58,527 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2053233759] [2024-06-27 20:26:58,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:26:58,527 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:26:58,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:26:59,134 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:26:59,134 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:26:59,134 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2053233759] [2024-06-27 20:26:59,134 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2053233759] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:26:59,134 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:26:59,135 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:26:59,135 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1764511758] [2024-06-27 20:26:59,135 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:26:59,135 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:26:59,136 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:26:59,136 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:26:59,136 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:26:59,215 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-27 20:26:59,215 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 136 places, 149 transitions, 1311 flow. Second operand has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:26:59,215 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:26:59,216 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-27 20:26:59,216 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:26:59,732 INFO L124 PetriNetUnfolderBase]: 1961/3131 cut-off events. [2024-06-27 20:26:59,732 INFO L125 PetriNetUnfolderBase]: For 111114/111117 co-relation queries the response was YES. [2024-06-27 20:26:59,744 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20575 conditions, 3131 events. 1961/3131 cut-off events. For 111114/111117 co-relation queries the response was YES. Maximal size of possible extension queue 173. Compared 17072 event pairs, 573 based on Foata normal form. 5/3133 useless extension candidates. Maximal degree in co-relation 20515. Up to 2885 conditions per place. [2024-06-27 20:26:59,754 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 145 selfloop transitions, 28 changer transitions 0/178 dead transitions. [2024-06-27 20:26:59,754 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 143 places, 178 transitions, 1799 flow [2024-06-27 20:26:59,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:26:59,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:26:59,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 153 transitions. [2024-06-27 20:26:59,755 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45535714285714285 [2024-06-27 20:26:59,755 INFO L175 Difference]: Start difference. First operand has 136 places, 149 transitions, 1311 flow. Second operand 8 states and 153 transitions. [2024-06-27 20:26:59,755 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 143 places, 178 transitions, 1799 flow [2024-06-27 20:26:59,815 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 137 places, 178 transitions, 1727 flow, removed 6 selfloop flow, removed 6 redundant places. [2024-06-27 20:26:59,817 INFO L231 Difference]: Finished difference. Result has 138 places, 153 transitions, 1378 flow [2024-06-27 20:26:59,818 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1239, PETRI_DIFFERENCE_MINUEND_PLACES=130, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=149, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=121, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1378, PETRI_PLACES=138, PETRI_TRANSITIONS=153} [2024-06-27 20:26:59,818 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 95 predicate places. [2024-06-27 20:26:59,818 INFO L495 AbstractCegarLoop]: Abstraction has has 138 places, 153 transitions, 1378 flow [2024-06-27 20:26:59,818 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:26:59,818 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:26:59,818 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:26:59,819 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-27 20:26:59,819 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:26:59,819 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:26:59,819 INFO L85 PathProgramCache]: Analyzing trace with hash -1465930446, now seen corresponding path program 1 times [2024-06-27 20:26:59,819 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:26:59,819 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [308864312] [2024-06-27 20:26:59,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:26:59,820 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:26:59,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:27:00,366 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:27:00,367 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:27:00,367 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [308864312] [2024-06-27 20:27:00,367 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [308864312] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:27:00,367 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:27:00,367 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:27:00,367 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [458288069] [2024-06-27 20:27:00,367 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:27:00,368 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:27:00,368 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:27:00,368 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:27:00,368 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:27:00,443 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-27 20:27:00,444 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 138 places, 153 transitions, 1378 flow. Second operand has 8 states, 8 states have (on average 12.75) internal successors, (102), 8 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:27:00,444 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:27:00,444 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-27 20:27:00,444 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:27:00,950 INFO L124 PetriNetUnfolderBase]: 1924/3106 cut-off events. [2024-06-27 20:27:00,951 INFO L125 PetriNetUnfolderBase]: For 120726/120729 co-relation queries the response was YES. [2024-06-27 20:27:00,965 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21211 conditions, 3106 events. 1924/3106 cut-off events. For 120726/120729 co-relation queries the response was YES. Maximal size of possible extension queue 175. Compared 17219 event pairs, 547 based on Foata normal form. 6/3109 useless extension candidates. Maximal degree in co-relation 21150. Up to 2774 conditions per place. [2024-06-27 20:27:00,977 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 140 selfloop transitions, 23 changer transitions 0/177 dead transitions. [2024-06-27 20:27:00,977 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 144 places, 177 transitions, 1815 flow [2024-06-27 20:27:00,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:27:00,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:27:00,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 140 transitions. [2024-06-27 20:27:00,988 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47619047619047616 [2024-06-27 20:27:00,988 INFO L175 Difference]: Start difference. First operand has 138 places, 153 transitions, 1378 flow. Second operand 7 states and 140 transitions. [2024-06-27 20:27:00,988 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 144 places, 177 transitions, 1815 flow [2024-06-27 20:27:01,063 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 138 places, 177 transitions, 1704 flow, removed 30 selfloop flow, removed 6 redundant places. [2024-06-27 20:27:01,065 INFO L231 Difference]: Finished difference. Result has 139 places, 157 transitions, 1383 flow [2024-06-27 20:27:01,065 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1267, PETRI_DIFFERENCE_MINUEND_PLACES=132, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=153, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=130, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1383, PETRI_PLACES=139, PETRI_TRANSITIONS=157} [2024-06-27 20:27:01,066 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 96 predicate places. [2024-06-27 20:27:01,066 INFO L495 AbstractCegarLoop]: Abstraction has has 139 places, 157 transitions, 1383 flow [2024-06-27 20:27:01,066 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.75) internal successors, (102), 8 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:27:01,066 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:27:01,070 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:27:01,071 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-27 20:27:01,071 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:27:01,071 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:27:01,071 INFO L85 PathProgramCache]: Analyzing trace with hash 865461500, now seen corresponding path program 2 times [2024-06-27 20:27:01,071 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:27:01,071 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [530335871] [2024-06-27 20:27:01,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:27:01,071 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:27:01,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:27:01,700 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:27:01,700 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:27:01,701 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [530335871] [2024-06-27 20:27:01,701 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [530335871] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:27:01,701 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:27:01,701 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:27:01,701 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [681531735] [2024-06-27 20:27:01,701 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:27:01,701 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:27:01,702 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:27:01,702 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:27:01,702 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:27:01,763 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-27 20:27:01,764 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 139 places, 157 transitions, 1383 flow. Second operand has 8 states, 8 states have (on average 12.75) internal successors, (102), 8 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:27:01,764 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:27:01,764 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-27 20:27:01,764 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:27:02,251 INFO L124 PetriNetUnfolderBase]: 1926/3114 cut-off events. [2024-06-27 20:27:02,251 INFO L125 PetriNetUnfolderBase]: For 125616/125619 co-relation queries the response was YES. [2024-06-27 20:27:02,264 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21330 conditions, 3114 events. 1926/3114 cut-off events. For 125616/125619 co-relation queries the response was YES. Maximal size of possible extension queue 175. Compared 17329 event pairs, 546 based on Foata normal form. 6/3117 useless extension candidates. Maximal degree in co-relation 21268. Up to 2723 conditions per place. [2024-06-27 20:27:02,275 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 130 selfloop transitions, 35 changer transitions 0/179 dead transitions. [2024-06-27 20:27:02,275 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 145 places, 179 transitions, 1893 flow [2024-06-27 20:27:02,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:27:02,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:27:02,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 140 transitions. [2024-06-27 20:27:02,276 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47619047619047616 [2024-06-27 20:27:02,276 INFO L175 Difference]: Start difference. First operand has 139 places, 157 transitions, 1383 flow. Second operand 7 states and 140 transitions. [2024-06-27 20:27:02,276 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 145 places, 179 transitions, 1893 flow [2024-06-27 20:27:02,353 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 142 places, 179 transitions, 1833 flow, removed 18 selfloop flow, removed 3 redundant places. [2024-06-27 20:27:02,356 INFO L231 Difference]: Finished difference. Result has 143 places, 160 transitions, 1458 flow [2024-06-27 20:27:02,357 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1323, PETRI_DIFFERENCE_MINUEND_PLACES=136, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=157, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=124, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1458, PETRI_PLACES=143, PETRI_TRANSITIONS=160} [2024-06-27 20:27:02,357 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 100 predicate places. [2024-06-27 20:27:02,357 INFO L495 AbstractCegarLoop]: Abstraction has has 143 places, 160 transitions, 1458 flow [2024-06-27 20:27:02,357 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.75) internal successors, (102), 8 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:27:02,357 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:27:02,357 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:27:02,358 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-27 20:27:02,358 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:27:02,358 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:27:02,358 INFO L85 PathProgramCache]: Analyzing trace with hash -1260090109, now seen corresponding path program 2 times [2024-06-27 20:27:02,358 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:27:02,358 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [144753914] [2024-06-27 20:27:02,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:27:02,358 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:27:02,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:27:03,043 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:27:03,043 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:27:03,043 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [144753914] [2024-06-27 20:27:03,043 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [144753914] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:27:03,044 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:27:03,044 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:27:03,044 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [79082029] [2024-06-27 20:27:03,044 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:27:03,044 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:27:03,044 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:27:03,044 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:27:03,045 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:27:03,148 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-27 20:27:03,148 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 143 places, 160 transitions, 1458 flow. Second operand has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:27:03,149 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:27:03,149 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-27 20:27:03,149 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:27:03,630 INFO L124 PetriNetUnfolderBase]: 2060/3285 cut-off events. [2024-06-27 20:27:03,631 INFO L125 PetriNetUnfolderBase]: For 135153/135156 co-relation queries the response was YES. [2024-06-27 20:27:03,645 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22767 conditions, 3285 events. 2060/3285 cut-off events. For 135153/135156 co-relation queries the response was YES. Maximal size of possible extension queue 185. Compared 18115 event pairs, 575 based on Foata normal form. 5/3287 useless extension candidates. Maximal degree in co-relation 22704. Up to 2884 conditions per place. [2024-06-27 20:27:03,657 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 141 selfloop transitions, 48 changer transitions 0/194 dead transitions. [2024-06-27 20:27:03,657 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 150 places, 194 transitions, 2268 flow [2024-06-27 20:27:03,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:27:03,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:27:03,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 153 transitions. [2024-06-27 20:27:03,658 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45535714285714285 [2024-06-27 20:27:03,658 INFO L175 Difference]: Start difference. First operand has 143 places, 160 transitions, 1458 flow. Second operand 8 states and 153 transitions. [2024-06-27 20:27:03,658 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 150 places, 194 transitions, 2268 flow [2024-06-27 20:27:03,734 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 146 places, 194 transitions, 2183 flow, removed 21 selfloop flow, removed 4 redundant places. [2024-06-27 20:27:03,737 INFO L231 Difference]: Finished difference. Result has 148 places, 172 transitions, 1735 flow [2024-06-27 20:27:03,737 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1373, PETRI_DIFFERENCE_MINUEND_PLACES=139, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=160, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=119, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1735, PETRI_PLACES=148, PETRI_TRANSITIONS=172} [2024-06-27 20:27:03,737 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 105 predicate places. [2024-06-27 20:27:03,738 INFO L495 AbstractCegarLoop]: Abstraction has has 148 places, 172 transitions, 1735 flow [2024-06-27 20:27:03,738 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:27:03,738 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:27:03,738 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:27:03,738 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-27 20:27:03,738 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:27:03,739 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:27:03,739 INFO L85 PathProgramCache]: Analyzing trace with hash 936968257, now seen corresponding path program 3 times [2024-06-27 20:27:03,739 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:27:03,739 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [111699985] [2024-06-27 20:27:03,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:27:03,740 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:27:03,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:27:04,329 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:27:04,330 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:27:04,330 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [111699985] [2024-06-27 20:27:04,330 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [111699985] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:27:04,330 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:27:04,330 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:27:04,330 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1665311831] [2024-06-27 20:27:04,330 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:27:04,330 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:27:04,330 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:27:04,330 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:27:04,330 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:27:04,402 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-27 20:27:04,402 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 148 places, 172 transitions, 1735 flow. Second operand has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:27:04,402 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:27:04,402 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-27 20:27:04,402 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:27:04,933 INFO L124 PetriNetUnfolderBase]: 2055/3279 cut-off events. [2024-06-27 20:27:04,933 INFO L125 PetriNetUnfolderBase]: For 143631/143634 co-relation queries the response was YES. [2024-06-27 20:27:04,947 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23447 conditions, 3279 events. 2055/3279 cut-off events. For 143631/143634 co-relation queries the response was YES. Maximal size of possible extension queue 185. Compared 18098 event pairs, 570 based on Foata normal form. 5/3281 useless extension candidates. Maximal degree in co-relation 23382. Up to 2882 conditions per place. [2024-06-27 20:27:04,959 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 142 selfloop transitions, 47 changer transitions 0/194 dead transitions. [2024-06-27 20:27:04,959 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 155 places, 194 transitions, 2327 flow [2024-06-27 20:27:04,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:27:04,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:27:04,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 152 transitions. [2024-06-27 20:27:04,960 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4523809523809524 [2024-06-27 20:27:04,960 INFO L175 Difference]: Start difference. First operand has 148 places, 172 transitions, 1735 flow. Second operand 8 states and 152 transitions. [2024-06-27 20:27:04,960 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 155 places, 194 transitions, 2327 flow [2024-06-27 20:27:05,067 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 152 places, 194 transitions, 2164 flow, removed 72 selfloop flow, removed 3 redundant places. [2024-06-27 20:27:05,071 INFO L231 Difference]: Finished difference. Result has 153 places, 172 transitions, 1674 flow [2024-06-27 20:27:05,071 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1572, PETRI_DIFFERENCE_MINUEND_PLACES=145, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=172, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=125, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1674, PETRI_PLACES=153, PETRI_TRANSITIONS=172} [2024-06-27 20:27:05,072 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 110 predicate places. [2024-06-27 20:27:05,072 INFO L495 AbstractCegarLoop]: Abstraction has has 153 places, 172 transitions, 1674 flow [2024-06-27 20:27:05,072 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:27:05,072 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:27:05,072 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:27:05,072 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-27 20:27:05,072 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:27:05,073 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:27:05,073 INFO L85 PathProgramCache]: Analyzing trace with hash 936968660, now seen corresponding path program 1 times [2024-06-27 20:27:05,073 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:27:05,073 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [626351209] [2024-06-27 20:27:05,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:27:05,074 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:27:05,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:27:05,642 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:27:05,642 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:27:05,642 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [626351209] [2024-06-27 20:27:05,642 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [626351209] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:27:05,642 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:27:05,643 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:27:05,643 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1884891072] [2024-06-27 20:27:05,643 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:27:05,643 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:27:05,643 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:27:05,646 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:27:05,646 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:27:05,728 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-27 20:27:05,728 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 153 places, 172 transitions, 1674 flow. Second operand has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:27:05,728 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:27:05,728 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-27 20:27:05,728 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:27:06,256 INFO L124 PetriNetUnfolderBase]: 2060/3285 cut-off events. [2024-06-27 20:27:06,257 INFO L125 PetriNetUnfolderBase]: For 144608/144608 co-relation queries the response was YES. [2024-06-27 20:27:06,276 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23536 conditions, 3285 events. 2060/3285 cut-off events. For 144608/144608 co-relation queries the response was YES. Maximal size of possible extension queue 185. Compared 18018 event pairs, 581 based on Foata normal form. 1/3284 useless extension candidates. Maximal degree in co-relation 23469. Up to 3100 conditions per place. [2024-06-27 20:27:06,288 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 170 selfloop transitions, 17 changer transitions 0/192 dead transitions. [2024-06-27 20:27:06,289 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 160 places, 192 transitions, 2152 flow [2024-06-27 20:27:06,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:27:06,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:27:06,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 139 transitions. [2024-06-27 20:27:06,294 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41369047619047616 [2024-06-27 20:27:06,295 INFO L175 Difference]: Start difference. First operand has 153 places, 172 transitions, 1674 flow. Second operand 8 states and 139 transitions. [2024-06-27 20:27:06,295 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 160 places, 192 transitions, 2152 flow [2024-06-27 20:27:06,372 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 153 places, 192 transitions, 2036 flow, removed 6 selfloop flow, removed 7 redundant places. [2024-06-27 20:27:06,374 INFO L231 Difference]: Finished difference. Result has 154 places, 175 transitions, 1666 flow [2024-06-27 20:27:06,374 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1558, PETRI_DIFFERENCE_MINUEND_PLACES=146, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=172, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=155, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1666, PETRI_PLACES=154, PETRI_TRANSITIONS=175} [2024-06-27 20:27:06,375 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 111 predicate places. [2024-06-27 20:27:06,375 INFO L495 AbstractCegarLoop]: Abstraction has has 154 places, 175 transitions, 1666 flow [2024-06-27 20:27:06,375 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:27:06,375 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:27:06,375 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:27:06,375 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-27 20:27:06,375 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:27:06,376 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:27:06,376 INFO L85 PathProgramCache]: Analyzing trace with hash 1476207404, now seen corresponding path program 3 times [2024-06-27 20:27:06,376 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:27:06,376 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1528831054] [2024-06-27 20:27:06,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:27:06,376 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:27:06,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:27:06,797 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:27:06,797 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:27:06,797 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1528831054] [2024-06-27 20:27:06,797 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1528831054] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:27:06,797 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:27:06,797 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:27:06,798 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1700059066] [2024-06-27 20:27:06,798 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:27:06,798 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:27:06,798 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:27:06,798 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:27:06,798 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:27:06,907 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-27 20:27:06,907 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 154 places, 175 transitions, 1666 flow. Second operand has 8 states, 8 states have (on average 12.75) internal successors, (102), 8 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:27:06,908 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:27:06,908 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-27 20:27:06,908 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:27:07,397 INFO L124 PetriNetUnfolderBase]: 1989/3202 cut-off events. [2024-06-27 20:27:07,398 INFO L125 PetriNetUnfolderBase]: For 151881/151883 co-relation queries the response was YES. [2024-06-27 20:27:07,412 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23232 conditions, 3202 events. 1989/3202 cut-off events. For 151881/151883 co-relation queries the response was YES. Maximal size of possible extension queue 183. Compared 17814 event pairs, 572 based on Foata normal form. 2/3197 useless extension candidates. Maximal degree in co-relation 23165. Up to 2845 conditions per place. [2024-06-27 20:27:07,424 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 152 selfloop transitions, 23 changer transitions 0/192 dead transitions. [2024-06-27 20:27:07,424 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 160 places, 192 transitions, 2064 flow [2024-06-27 20:27:07,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:27:07,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:27:07,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 137 transitions. [2024-06-27 20:27:07,425 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46598639455782315 [2024-06-27 20:27:07,425 INFO L175 Difference]: Start difference. First operand has 154 places, 175 transitions, 1666 flow. Second operand 7 states and 137 transitions. [2024-06-27 20:27:07,425 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 160 places, 192 transitions, 2064 flow [2024-06-27 20:27:07,526 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 154 places, 192 transitions, 1954 flow, removed 40 selfloop flow, removed 6 redundant places. [2024-06-27 20:27:07,528 INFO L231 Difference]: Finished difference. Result has 155 places, 175 transitions, 1608 flow [2024-06-27 20:27:07,528 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1556, PETRI_DIFFERENCE_MINUEND_PLACES=148, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=175, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=152, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1608, PETRI_PLACES=155, PETRI_TRANSITIONS=175} [2024-06-27 20:27:07,529 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 112 predicate places. [2024-06-27 20:27:07,529 INFO L495 AbstractCegarLoop]: Abstraction has has 155 places, 175 transitions, 1608 flow [2024-06-27 20:27:07,529 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.75) internal successors, (102), 8 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:27:07,529 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:27:07,529 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:27:07,529 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-27 20:27:07,529 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:27:07,530 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:27:07,530 INFO L85 PathProgramCache]: Analyzing trace with hash -1159374794, now seen corresponding path program 4 times [2024-06-27 20:27:07,530 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:27:07,530 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1830819912] [2024-06-27 20:27:07,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:27:07,530 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:27:07,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:27:08,113 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:27:08,113 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:27:08,113 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1830819912] [2024-06-27 20:27:08,113 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1830819912] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:27:08,113 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:27:08,114 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:27:08,114 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [81135518] [2024-06-27 20:27:08,114 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:27:08,114 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:27:08,114 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:27:08,115 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:27:08,115 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:27:08,174 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-27 20:27:08,175 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 155 places, 175 transitions, 1608 flow. Second operand has 8 states, 8 states have (on average 12.75) internal successors, (102), 8 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:27:08,175 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:27:08,175 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-27 20:27:08,175 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:27:08,676 INFO L124 PetriNetUnfolderBase]: 2014/3237 cut-off events. [2024-06-27 20:27:08,676 INFO L125 PetriNetUnfolderBase]: For 160991/161009 co-relation queries the response was YES. [2024-06-27 20:27:08,692 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23738 conditions, 3237 events. 2014/3237 cut-off events. For 160991/161009 co-relation queries the response was YES. Maximal size of possible extension queue 187. Compared 18023 event pairs, 560 based on Foata normal form. 2/3217 useless extension candidates. Maximal degree in co-relation 23670. Up to 2854 conditions per place. [2024-06-27 20:27:08,703 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 144 selfloop transitions, 32 changer transitions 0/193 dead transitions. [2024-06-27 20:27:08,704 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 161 places, 193 transitions, 2060 flow [2024-06-27 20:27:08,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:27:08,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:27:08,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 137 transitions. [2024-06-27 20:27:08,705 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46598639455782315 [2024-06-27 20:27:08,705 INFO L175 Difference]: Start difference. First operand has 155 places, 175 transitions, 1608 flow. Second operand 7 states and 137 transitions. [2024-06-27 20:27:08,705 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 161 places, 193 transitions, 2060 flow [2024-06-27 20:27:08,784 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 151 places, 193 transitions, 1922 flow, removed 8 selfloop flow, removed 10 redundant places. [2024-06-27 20:27:08,786 INFO L231 Difference]: Finished difference. Result has 152 places, 178 transitions, 1598 flow [2024-06-27 20:27:08,786 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1470, PETRI_DIFFERENCE_MINUEND_PLACES=145, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=175, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=143, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1598, PETRI_PLACES=152, PETRI_TRANSITIONS=178} [2024-06-27 20:27:08,786 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 109 predicate places. [2024-06-27 20:27:08,786 INFO L495 AbstractCegarLoop]: Abstraction has has 152 places, 178 transitions, 1598 flow [2024-06-27 20:27:08,787 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.75) internal successors, (102), 8 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:27:08,787 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:27:08,787 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:27:08,787 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-27 20:27:08,787 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:27:08,787 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:27:08,787 INFO L85 PathProgramCache]: Analyzing trace with hash -960073004, now seen corresponding path program 5 times [2024-06-27 20:27:08,788 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:27:08,788 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1157529430] [2024-06-27 20:27:08,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:27:08,788 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:27:08,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:27:09,324 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:27:09,325 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:27:09,325 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1157529430] [2024-06-27 20:27:09,325 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1157529430] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:27:09,325 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:27:09,325 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:27:09,325 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2003265449] [2024-06-27 20:27:09,325 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:27:09,326 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:27:09,326 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:27:09,326 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:27:09,326 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:27:09,393 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-27 20:27:09,394 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 152 places, 178 transitions, 1598 flow. Second operand has 8 states, 8 states have (on average 12.75) internal successors, (102), 8 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:27:09,394 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:27:09,394 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-27 20:27:09,394 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:27:09,841 INFO L124 PetriNetUnfolderBase]: 2018/3261 cut-off events. [2024-06-27 20:27:09,842 INFO L125 PetriNetUnfolderBase]: For 167943/167964 co-relation queries the response was YES. [2024-06-27 20:27:09,856 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23996 conditions, 3261 events. 2018/3261 cut-off events. For 167943/167964 co-relation queries the response was YES. Maximal size of possible extension queue 189. Compared 18373 event pairs, 574 based on Foata normal form. 4/3242 useless extension candidates. Maximal degree in co-relation 23927. Up to 2763 conditions per place. [2024-06-27 20:27:09,867 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 123 selfloop transitions, 55 changer transitions 0/195 dead transitions. [2024-06-27 20:27:09,868 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 158 places, 195 transitions, 2142 flow [2024-06-27 20:27:09,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:27:09,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:27:09,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 137 transitions. [2024-06-27 20:27:09,869 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46598639455782315 [2024-06-27 20:27:09,869 INFO L175 Difference]: Start difference. First operand has 152 places, 178 transitions, 1598 flow. Second operand 7 states and 137 transitions. [2024-06-27 20:27:09,869 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 158 places, 195 transitions, 2142 flow [2024-06-27 20:27:09,968 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 153 places, 195 transitions, 2046 flow, removed 18 selfloop flow, removed 5 redundant places. [2024-06-27 20:27:09,970 INFO L231 Difference]: Finished difference. Result has 154 places, 181 transitions, 1676 flow [2024-06-27 20:27:09,970 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1502, PETRI_DIFFERENCE_MINUEND_PLACES=147, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=178, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=126, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1676, PETRI_PLACES=154, PETRI_TRANSITIONS=181} [2024-06-27 20:27:09,971 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 111 predicate places. [2024-06-27 20:27:09,971 INFO L495 AbstractCegarLoop]: Abstraction has has 154 places, 181 transitions, 1676 flow [2024-06-27 20:27:09,974 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.75) internal successors, (102), 8 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:27:09,974 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:27:09,975 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:27:09,975 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-27 20:27:09,975 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:27:09,975 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:27:09,975 INFO L85 PathProgramCache]: Analyzing trace with hash -960280394, now seen corresponding path program 6 times [2024-06-27 20:27:09,975 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:27:09,975 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [686082088] [2024-06-27 20:27:09,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:27:09,976 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:27:09,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:27:10,594 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:27:10,594 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:27:10,594 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [686082088] [2024-06-27 20:27:10,595 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [686082088] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:27:10,595 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:27:10,595 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 20:27:10,595 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1753231258] [2024-06-27 20:27:10,595 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:27:10,595 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 20:27:10,595 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:27:10,595 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 20:27:10,595 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 20:27:10,671 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-27 20:27:10,671 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 154 places, 181 transitions, 1676 flow. Second operand has 8 states, 8 states have (on average 12.75) internal successors, (102), 8 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:27:10,671 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:27:10,671 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-27 20:27:10,671 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:27:11,187 INFO L124 PetriNetUnfolderBase]: 2002/3235 cut-off events. [2024-06-27 20:27:11,187 INFO L125 PetriNetUnfolderBase]: For 173409/173430 co-relation queries the response was YES. [2024-06-27 20:27:11,204 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23889 conditions, 3235 events. 2002/3235 cut-off events. For 173409/173430 co-relation queries the response was YES. Maximal size of possible extension queue 187. Compared 18213 event pairs, 567 based on Foata normal form. 6/3218 useless extension candidates. Maximal degree in co-relation 23819. Up to 2750 conditions per place. [2024-06-27 20:27:11,216 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 126 selfloop transitions, 51 changer transitions 0/194 dead transitions. [2024-06-27 20:27:11,216 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 160 places, 194 transitions, 2078 flow [2024-06-27 20:27:11,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:27:11,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:27:11,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 137 transitions. [2024-06-27 20:27:11,217 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46598639455782315 [2024-06-27 20:27:11,217 INFO L175 Difference]: Start difference. First operand has 154 places, 181 transitions, 1676 flow. Second operand 7 states and 137 transitions. [2024-06-27 20:27:11,217 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 160 places, 194 transitions, 2078 flow [2024-06-27 20:27:11,347 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 156 places, 194 transitions, 1903 flow, removed 43 selfloop flow, removed 4 redundant places. [2024-06-27 20:27:11,349 INFO L231 Difference]: Finished difference. Result has 157 places, 181 transitions, 1611 flow [2024-06-27 20:27:11,349 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1501, PETRI_DIFFERENCE_MINUEND_PLACES=150, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=181, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=130, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1611, PETRI_PLACES=157, PETRI_TRANSITIONS=181} [2024-06-27 20:27:11,350 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 114 predicate places. [2024-06-27 20:27:11,350 INFO L495 AbstractCegarLoop]: Abstraction has has 157 places, 181 transitions, 1611 flow [2024-06-27 20:27:11,350 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.75) internal successors, (102), 8 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:27:11,350 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:27:11,350 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:27:11,350 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-27 20:27:11,351 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:27:11,351 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:27:11,351 INFO L85 PathProgramCache]: Analyzing trace with hash -952446508, now seen corresponding path program 2 times [2024-06-27 20:27:11,351 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:27:11,351 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2006254509] [2024-06-27 20:27:11,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:27:11,351 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:27:11,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:27:11,992 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:27:11,992 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:27:11,992 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2006254509] [2024-06-27 20:27:11,993 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2006254509] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:27:11,993 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:27:11,993 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:27:11,993 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1583350129] [2024-06-27 20:27:11,993 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:27:11,993 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:27:11,993 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:27:11,994 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:27:11,994 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:27:12,040 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-27 20:27:12,041 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 157 places, 181 transitions, 1611 flow. Second operand has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:27:12,041 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:27:12,041 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-27 20:27:12,041 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:27:12,478 INFO L124 PetriNetUnfolderBase]: 2055/3278 cut-off events. [2024-06-27 20:27:12,478 INFO L125 PetriNetUnfolderBase]: For 172255/172263 co-relation queries the response was YES. [2024-06-27 20:27:12,494 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23988 conditions, 3278 events. 2055/3278 cut-off events. For 172255/172263 co-relation queries the response was YES. Maximal size of possible extension queue 182. Compared 17990 event pairs, 583 based on Foata normal form. 7/3282 useless extension candidates. Maximal degree in co-relation 23917. Up to 3066 conditions per place. [2024-06-27 20:27:12,507 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 159 selfloop transitions, 37 changer transitions 0/201 dead transitions. [2024-06-27 20:27:12,507 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 164 places, 201 transitions, 2259 flow [2024-06-27 20:27:12,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:27:12,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:27:12,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 138 transitions. [2024-06-27 20:27:12,511 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4107142857142857 [2024-06-27 20:27:12,511 INFO L175 Difference]: Start difference. First operand has 157 places, 181 transitions, 1611 flow. Second operand 8 states and 138 transitions. [2024-06-27 20:27:12,511 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 164 places, 201 transitions, 2259 flow [2024-06-27 20:27:12,628 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 157 places, 201 transitions, 2130 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-06-27 20:27:12,630 INFO L231 Difference]: Finished difference. Result has 159 places, 189 transitions, 1728 flow [2024-06-27 20:27:12,631 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1482, PETRI_DIFFERENCE_MINUEND_PLACES=150, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=181, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=147, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1728, PETRI_PLACES=159, PETRI_TRANSITIONS=189} [2024-06-27 20:27:12,631 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 116 predicate places. [2024-06-27 20:27:12,631 INFO L495 AbstractCegarLoop]: Abstraction has has 159 places, 189 transitions, 1728 flow [2024-06-27 20:27:12,631 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:27:12,632 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:27:12,632 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:27:12,632 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-27 20:27:12,632 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:27:12,632 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:27:12,632 INFO L85 PathProgramCache]: Analyzing trace with hash -965790551, now seen corresponding path program 4 times [2024-06-27 20:27:12,632 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:27:12,633 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [521741188] [2024-06-27 20:27:12,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:27:12,633 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:27:12,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:27:13,228 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:27:13,228 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:27:13,229 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [521741188] [2024-06-27 20:27:13,229 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [521741188] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:27:13,229 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:27:13,229 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:27:13,229 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [339601337] [2024-06-27 20:27:13,229 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:27:13,229 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:27:13,229 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:27:13,230 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:27:13,230 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:27:13,284 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-27 20:27:13,284 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 159 places, 189 transitions, 1728 flow. Second operand has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:27:13,284 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:27:13,284 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-27 20:27:13,284 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:27:13,748 INFO L124 PetriNetUnfolderBase]: 2102/3350 cut-off events. [2024-06-27 20:27:13,748 INFO L125 PetriNetUnfolderBase]: For 186991/186996 co-relation queries the response was YES. [2024-06-27 20:27:13,764 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25008 conditions, 3350 events. 2102/3350 cut-off events. For 186991/186996 co-relation queries the response was YES. Maximal size of possible extension queue 188. Compared 18469 event pairs, 601 based on Foata normal form. 5/3347 useless extension candidates. Maximal degree in co-relation 24935. Up to 2781 conditions per place. [2024-06-27 20:27:13,776 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 134 selfloop transitions, 80 changer transitions 0/219 dead transitions. [2024-06-27 20:27:13,777 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 166 places, 219 transitions, 2734 flow [2024-06-27 20:27:13,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:27:13,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:27:13,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 153 transitions. [2024-06-27 20:27:13,781 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45535714285714285 [2024-06-27 20:27:13,781 INFO L175 Difference]: Start difference. First operand has 159 places, 189 transitions, 1728 flow. Second operand 8 states and 153 transitions. [2024-06-27 20:27:13,781 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 166 places, 219 transitions, 2734 flow [2024-06-27 20:27:13,909 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 162 places, 219 transitions, 2628 flow, removed 37 selfloop flow, removed 4 redundant places. [2024-06-27 20:27:13,914 INFO L231 Difference]: Finished difference. Result has 164 places, 201 transitions, 2081 flow [2024-06-27 20:27:13,914 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1622, PETRI_DIFFERENCE_MINUEND_PLACES=155, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=189, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=116, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2081, PETRI_PLACES=164, PETRI_TRANSITIONS=201} [2024-06-27 20:27:13,916 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 121 predicate places. [2024-06-27 20:27:13,916 INFO L495 AbstractCegarLoop]: Abstraction has has 164 places, 201 transitions, 2081 flow [2024-06-27 20:27:13,916 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:27:13,916 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:27:13,916 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:27:13,917 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-27 20:27:13,917 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:27:13,917 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:27:13,917 INFO L85 PathProgramCache]: Analyzing trace with hash -952892381, now seen corresponding path program 5 times [2024-06-27 20:27:13,917 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:27:13,917 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [457092624] [2024-06-27 20:27:13,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:27:13,917 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:27:13,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:27:14,539 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:27:14,540 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:27:14,540 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [457092624] [2024-06-27 20:27:14,540 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [457092624] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:27:14,540 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:27:14,540 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:27:14,540 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [248624419] [2024-06-27 20:27:14,540 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:27:14,541 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:27:14,541 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:27:14,541 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:27:14,541 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:27:14,607 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-27 20:27:14,608 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 164 places, 201 transitions, 2081 flow. Second operand has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:27:14,608 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:27:14,608 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-27 20:27:14,608 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:27:15,110 INFO L124 PetriNetUnfolderBase]: 2153/3430 cut-off events. [2024-06-27 20:27:15,110 INFO L125 PetriNetUnfolderBase]: For 203953/203958 co-relation queries the response was YES. [2024-06-27 20:27:15,130 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26891 conditions, 3430 events. 2153/3430 cut-off events. For 203953/203958 co-relation queries the response was YES. Maximal size of possible extension queue 196. Compared 18989 event pairs, 593 based on Foata normal form. 5/3427 useless extension candidates. Maximal degree in co-relation 26815. Up to 2824 conditions per place. [2024-06-27 20:27:15,200 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 132 selfloop transitions, 89 changer transitions 0/226 dead transitions. [2024-06-27 20:27:15,200 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 171 places, 226 transitions, 2950 flow [2024-06-27 20:27:15,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:27:15,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:27:15,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 151 transitions. [2024-06-27 20:27:15,201 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4494047619047619 [2024-06-27 20:27:15,201 INFO L175 Difference]: Start difference. First operand has 164 places, 201 transitions, 2081 flow. Second operand 8 states and 151 transitions. [2024-06-27 20:27:15,201 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 171 places, 226 transitions, 2950 flow [2024-06-27 20:27:15,342 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 167 places, 226 transitions, 2690 flow, removed 85 selfloop flow, removed 4 redundant places. [2024-06-27 20:27:15,345 INFO L231 Difference]: Finished difference. Result has 169 places, 209 transitions, 2211 flow [2024-06-27 20:27:15,345 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1861, PETRI_DIFFERENCE_MINUEND_PLACES=160, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=201, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=81, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=118, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2211, PETRI_PLACES=169, PETRI_TRANSITIONS=209} [2024-06-27 20:27:15,345 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 126 predicate places. [2024-06-27 20:27:15,345 INFO L495 AbstractCegarLoop]: Abstraction has has 169 places, 209 transitions, 2211 flow [2024-06-27 20:27:15,345 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:27:15,346 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:27:15,346 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:27:15,346 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-27 20:27:15,346 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:27:15,346 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:27:15,346 INFO L85 PathProgramCache]: Analyzing trace with hash -952891978, now seen corresponding path program 3 times [2024-06-27 20:27:15,346 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:27:15,347 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [136419285] [2024-06-27 20:27:15,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:27:15,347 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:27:15,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:27:15,938 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:27:15,938 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:27:15,938 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [136419285] [2024-06-27 20:27:15,938 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [136419285] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:27:15,938 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:27:15,939 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:27:15,939 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1112497451] [2024-06-27 20:27:15,939 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:27:15,939 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:27:15,939 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:27:15,939 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:27:15,940 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:27:15,991 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-27 20:27:15,991 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 169 places, 209 transitions, 2211 flow. Second operand has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:27:15,991 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:27:15,991 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-27 20:27:15,991 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:27:16,536 INFO L124 PetriNetUnfolderBase]: 2158/3435 cut-off events. [2024-06-27 20:27:16,537 INFO L125 PetriNetUnfolderBase]: For 204201/204209 co-relation queries the response was YES. [2024-06-27 20:27:16,554 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26536 conditions, 3435 events. 2158/3435 cut-off events. For 204201/204209 co-relation queries the response was YES. Maximal size of possible extension queue 195. Compared 18975 event pairs, 602 based on Foata normal form. 7/3439 useless extension candidates. Maximal degree in co-relation 26458. Up to 3208 conditions per place. [2024-06-27 20:27:16,566 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 181 selfloop transitions, 38 changer transitions 0/224 dead transitions. [2024-06-27 20:27:16,567 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 176 places, 224 transitions, 2832 flow [2024-06-27 20:27:16,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:27:16,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:27:16,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 139 transitions. [2024-06-27 20:27:16,568 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41369047619047616 [2024-06-27 20:27:16,568 INFO L175 Difference]: Start difference. First operand has 169 places, 209 transitions, 2211 flow. Second operand 8 states and 139 transitions. [2024-06-27 20:27:16,568 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 176 places, 224 transitions, 2832 flow [2024-06-27 20:27:16,745 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 172 places, 224 transitions, 2647 flow, removed 36 selfloop flow, removed 4 redundant places. [2024-06-27 20:27:16,748 INFO L231 Difference]: Finished difference. Result has 173 places, 212 transitions, 2173 flow [2024-06-27 20:27:16,748 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2026, PETRI_DIFFERENCE_MINUEND_PLACES=165, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=209, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=174, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2173, PETRI_PLACES=173, PETRI_TRANSITIONS=212} [2024-06-27 20:27:16,748 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 130 predicate places. [2024-06-27 20:27:16,748 INFO L495 AbstractCegarLoop]: Abstraction has has 173 places, 212 transitions, 2173 flow [2024-06-27 20:27:16,748 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:27:16,749 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:27:16,749 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:27:16,749 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-27 20:27:16,749 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:27:16,749 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:27:16,749 INFO L85 PathProgramCache]: Analyzing trace with hash 1252454947, now seen corresponding path program 6 times [2024-06-27 20:27:16,749 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:27:16,749 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1342391491] [2024-06-27 20:27:16,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:27:16,750 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:27:16,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:27:17,352 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:27:17,352 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:27:17,353 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1342391491] [2024-06-27 20:27:17,353 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1342391491] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:27:17,353 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:27:17,353 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:27:17,353 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [381083904] [2024-06-27 20:27:17,353 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:27:17,353 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:27:17,353 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:27:17,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:27:17,354 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:27:17,428 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-27 20:27:17,428 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 173 places, 212 transitions, 2173 flow. Second operand has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:27:17,428 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:27:17,428 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-27 20:27:17,429 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:27:17,916 INFO L124 PetriNetUnfolderBase]: 2153/3433 cut-off events. [2024-06-27 20:27:17,917 INFO L125 PetriNetUnfolderBase]: For 210394/210399 co-relation queries the response was YES. [2024-06-27 20:27:17,934 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26171 conditions, 3433 events. 2153/3433 cut-off events. For 210394/210399 co-relation queries the response was YES. Maximal size of possible extension queue 194. Compared 19030 event pairs, 603 based on Foata normal form. 5/3430 useless extension candidates. Maximal degree in co-relation 26092. Up to 2829 conditions per place. [2024-06-27 20:27:17,947 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 142 selfloop transitions, 83 changer transitions 0/230 dead transitions. [2024-06-27 20:27:17,947 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 180 places, 230 transitions, 2963 flow [2024-06-27 20:27:17,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:27:17,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:27:17,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 153 transitions. [2024-06-27 20:27:17,948 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45535714285714285 [2024-06-27 20:27:17,948 INFO L175 Difference]: Start difference. First operand has 173 places, 212 transitions, 2173 flow. Second operand 8 states and 153 transitions. [2024-06-27 20:27:17,948 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 180 places, 230 transitions, 2963 flow [2024-06-27 20:27:18,144 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 175 places, 230 transitions, 2806 flow, removed 51 selfloop flow, removed 5 redundant places. [2024-06-27 20:27:18,146 INFO L231 Difference]: Finished difference. Result has 176 places, 212 transitions, 2190 flow [2024-06-27 20:27:18,147 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2016, PETRI_DIFFERENCE_MINUEND_PLACES=168, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=212, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=83, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=129, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2190, PETRI_PLACES=176, PETRI_TRANSITIONS=212} [2024-06-27 20:27:18,147 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 133 predicate places. [2024-06-27 20:27:18,147 INFO L495 AbstractCegarLoop]: Abstraction has has 176 places, 212 transitions, 2190 flow [2024-06-27 20:27:18,147 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:27:18,147 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:27:18,148 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:27:18,148 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-27 20:27:18,148 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:27:18,148 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:27:18,148 INFO L85 PathProgramCache]: Analyzing trace with hash -1094817170, now seen corresponding path program 4 times [2024-06-27 20:27:18,148 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:27:18,148 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1419199022] [2024-06-27 20:27:18,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:27:18,149 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:27:18,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:27:18,764 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:27:18,765 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:27:18,765 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1419199022] [2024-06-27 20:27:18,765 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1419199022] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:27:18,765 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:27:18,765 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:27:18,765 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1587751323] [2024-06-27 20:27:18,765 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:27:18,766 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:27:18,766 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:27:18,766 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:27:18,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:27:18,818 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-27 20:27:18,818 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 176 places, 212 transitions, 2190 flow. Second operand has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:27:18,818 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:27:18,818 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-27 20:27:18,818 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:27:19,300 INFO L124 PetriNetUnfolderBase]: 2150/3427 cut-off events. [2024-06-27 20:27:19,300 INFO L125 PetriNetUnfolderBase]: For 216018/216026 co-relation queries the response was YES. [2024-06-27 20:27:19,317 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26424 conditions, 3427 events. 2150/3427 cut-off events. For 216018/216026 co-relation queries the response was YES. Maximal size of possible extension queue 194. Compared 18985 event pairs, 600 based on Foata normal form. 7/3431 useless extension candidates. Maximal degree in co-relation 26344. Up to 3199 conditions per place. [2024-06-27 20:27:19,328 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 181 selfloop transitions, 38 changer transitions 0/224 dead transitions. [2024-06-27 20:27:19,329 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 183 places, 224 transitions, 2662 flow [2024-06-27 20:27:19,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:27:19,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:27:19,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 139 transitions. [2024-06-27 20:27:19,330 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41369047619047616 [2024-06-27 20:27:19,330 INFO L175 Difference]: Start difference. First operand has 176 places, 212 transitions, 2190 flow. Second operand 8 states and 139 transitions. [2024-06-27 20:27:19,330 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 183 places, 224 transitions, 2662 flow [2024-06-27 20:27:19,525 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 174 places, 224 transitions, 2372 flow, removed 25 selfloop flow, removed 9 redundant places. [2024-06-27 20:27:19,528 INFO L231 Difference]: Finished difference. Result has 175 places, 213 transitions, 1990 flow [2024-06-27 20:27:19,528 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1900, PETRI_DIFFERENCE_MINUEND_PLACES=167, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=212, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=175, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1990, PETRI_PLACES=175, PETRI_TRANSITIONS=213} [2024-06-27 20:27:19,529 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 132 predicate places. [2024-06-27 20:27:19,529 INFO L495 AbstractCegarLoop]: Abstraction has has 175 places, 213 transitions, 1990 flow [2024-06-27 20:27:19,529 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:27:19,529 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:27:19,529 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:27:19,529 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-27 20:27:19,529 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:27:19,530 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:27:19,530 INFO L85 PathProgramCache]: Analyzing trace with hash 1072330421, now seen corresponding path program 1 times [2024-06-27 20:27:19,530 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:27:19,530 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [617619162] [2024-06-27 20:27:19,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:27:19,530 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:27:19,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:27:20,323 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:27:20,323 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:27:20,324 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [617619162] [2024-06-27 20:27:20,324 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [617619162] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:27:20,324 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:27:20,324 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:27:20,324 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1500460171] [2024-06-27 20:27:20,324 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:27:20,324 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:27:20,325 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:27:20,325 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:27:20,325 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:27:20,402 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-27 20:27:20,403 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 175 places, 213 transitions, 1990 flow. Second operand has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 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) [2024-06-27 20:27:20,403 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:27:20,403 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-27 20:27:20,403 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:27:20,947 INFO L124 PetriNetUnfolderBase]: 2043/3319 cut-off events. [2024-06-27 20:27:20,948 INFO L125 PetriNetUnfolderBase]: For 224422/224422 co-relation queries the response was YES. [2024-06-27 20:27:20,967 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25390 conditions, 3319 events. 2043/3319 cut-off events. For 224422/224422 co-relation queries the response was YES. Maximal size of possible extension queue 189. Compared 18785 event pairs, 548 based on Foata normal form. 1/3318 useless extension candidates. Maximal degree in co-relation 25311. Up to 3039 conditions per place. [2024-06-27 20:27:20,982 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 205 selfloop transitions, 17 changer transitions 0/233 dead transitions. [2024-06-27 20:27:20,982 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 182 places, 233 transitions, 2538 flow [2024-06-27 20:27:20,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:27:20,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:27:20,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 146 transitions. [2024-06-27 20:27:20,983 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43452380952380953 [2024-06-27 20:27:20,983 INFO L175 Difference]: Start difference. First operand has 175 places, 213 transitions, 1990 flow. Second operand 8 states and 146 transitions. [2024-06-27 20:27:20,983 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 182 places, 233 transitions, 2538 flow [2024-06-27 20:27:21,210 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 177 places, 233 transitions, 2474 flow, removed 4 selfloop flow, removed 5 redundant places. [2024-06-27 20:27:21,212 INFO L231 Difference]: Finished difference. Result has 178 places, 216 transitions, 2034 flow [2024-06-27 20:27:21,213 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1926, PETRI_DIFFERENCE_MINUEND_PLACES=170, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=213, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=196, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2034, PETRI_PLACES=178, PETRI_TRANSITIONS=216} [2024-06-27 20:27:21,213 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 135 predicate places. [2024-06-27 20:27:21,213 INFO L495 AbstractCegarLoop]: Abstraction has has 178 places, 216 transitions, 2034 flow [2024-06-27 20:27:21,213 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 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) [2024-06-27 20:27:21,213 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:27:21,214 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:27:21,214 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-27 20:27:21,214 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:27:21,214 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:27:21,214 INFO L85 PathProgramCache]: Analyzing trace with hash 2144125802, now seen corresponding path program 1 times [2024-06-27 20:27:21,214 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:27:21,214 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1400977828] [2024-06-27 20:27:21,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:27:21,215 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:27:21,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:27:21,795 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:27:21,795 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:27:21,796 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1400977828] [2024-06-27 20:27:21,796 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1400977828] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:27:21,796 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:27:21,796 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:27:21,796 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1033393575] [2024-06-27 20:27:21,796 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:27:21,796 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:27:21,797 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:27:21,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:27:21,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:27:21,865 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-27 20:27:21,866 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 178 places, 216 transitions, 2034 flow. Second operand has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 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) [2024-06-27 20:27:21,866 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:27:21,866 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-27 20:27:21,866 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:27:22,378 INFO L124 PetriNetUnfolderBase]: 2053/3339 cut-off events. [2024-06-27 20:27:22,378 INFO L125 PetriNetUnfolderBase]: For 237723/237723 co-relation queries the response was YES. [2024-06-27 20:27:22,395 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25914 conditions, 3339 events. 2053/3339 cut-off events. For 237723/237723 co-relation queries the response was YES. Maximal size of possible extension queue 192. Compared 18980 event pairs, 543 based on Foata normal form. 4/3341 useless extension candidates. Maximal degree in co-relation 25834. Up to 3046 conditions per place. [2024-06-27 20:27:22,408 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 208 selfloop transitions, 17 changer transitions 0/236 dead transitions. [2024-06-27 20:27:22,408 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 185 places, 236 transitions, 2596 flow [2024-06-27 20:27:22,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:27:22,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:27:22,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 146 transitions. [2024-06-27 20:27:22,409 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43452380952380953 [2024-06-27 20:27:22,409 INFO L175 Difference]: Start difference. First operand has 178 places, 216 transitions, 2034 flow. Second operand 8 states and 146 transitions. [2024-06-27 20:27:22,409 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 185 places, 236 transitions, 2596 flow [2024-06-27 20:27:22,586 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 179 places, 236 transitions, 2510 flow, removed 28 selfloop flow, removed 6 redundant places. [2024-06-27 20:27:22,589 INFO L231 Difference]: Finished difference. Result has 180 places, 219 transitions, 2048 flow [2024-06-27 20:27:22,589 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1948, PETRI_DIFFERENCE_MINUEND_PLACES=172, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=216, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=199, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2048, PETRI_PLACES=180, PETRI_TRANSITIONS=219} [2024-06-27 20:27:22,589 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 137 predicate places. [2024-06-27 20:27:22,589 INFO L495 AbstractCegarLoop]: Abstraction has has 180 places, 219 transitions, 2048 flow [2024-06-27 20:27:22,590 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 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) [2024-06-27 20:27:22,590 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:27:22,590 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:27:22,590 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-27 20:27:22,590 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:27:22,590 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:27:22,590 INFO L85 PathProgramCache]: Analyzing trace with hash -952707466, now seen corresponding path program 2 times [2024-06-27 20:27:22,590 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:27:22,591 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [824101815] [2024-06-27 20:27:22,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:27:22,591 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:27:22,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:27:23,252 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:27:23,252 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:27:23,252 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [824101815] [2024-06-27 20:27:23,252 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [824101815] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:27:23,252 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:27:23,252 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:27:23,252 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1639335186] [2024-06-27 20:27:23,253 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:27:23,253 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:27:23,253 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:27:23,253 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:27:23,253 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:27:23,333 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-27 20:27:23,334 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 180 places, 219 transitions, 2048 flow. Second operand has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 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) [2024-06-27 20:27:23,334 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:27:23,334 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-27 20:27:23,334 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:27:23,821 INFO L124 PetriNetUnfolderBase]: 2104/3423 cut-off events. [2024-06-27 20:27:23,821 INFO L125 PetriNetUnfolderBase]: For 256311/256314 co-relation queries the response was YES. [2024-06-27 20:27:23,838 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27251 conditions, 3423 events. 2104/3423 cut-off events. For 256311/256314 co-relation queries the response was YES. Maximal size of possible extension queue 202. Compared 19621 event pairs, 546 based on Foata normal form. 6/3426 useless extension candidates. Maximal degree in co-relation 27170. Up to 3043 conditions per place. [2024-06-27 20:27:23,852 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 193 selfloop transitions, 41 changer transitions 0/245 dead transitions. [2024-06-27 20:27:23,852 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 187 places, 245 transitions, 2958 flow [2024-06-27 20:27:23,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:27:23,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:27:23,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 151 transitions. [2024-06-27 20:27:23,853 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4494047619047619 [2024-06-27 20:27:23,853 INFO L175 Difference]: Start difference. First operand has 180 places, 219 transitions, 2048 flow. Second operand 8 states and 151 transitions. [2024-06-27 20:27:23,853 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 187 places, 245 transitions, 2958 flow [2024-06-27 20:27:24,083 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 181 places, 245 transitions, 2880 flow, removed 24 selfloop flow, removed 6 redundant places. [2024-06-27 20:27:24,085 INFO L231 Difference]: Finished difference. Result has 182 places, 228 transitions, 2244 flow [2024-06-27 20:27:24,085 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1970, PETRI_DIFFERENCE_MINUEND_PLACES=174, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=219, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=184, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2244, PETRI_PLACES=182, PETRI_TRANSITIONS=228} [2024-06-27 20:27:24,086 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 139 predicate places. [2024-06-27 20:27:24,086 INFO L495 AbstractCegarLoop]: Abstraction has has 182 places, 228 transitions, 2244 flow [2024-06-27 20:27:24,086 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 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) [2024-06-27 20:27:24,086 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:27:24,086 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:27:24,086 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-27 20:27:24,086 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:27:24,087 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:27:24,087 INFO L85 PathProgramCache]: Analyzing trace with hash -1081478738, now seen corresponding path program 3 times [2024-06-27 20:27:24,087 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:27:24,087 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [59468408] [2024-06-27 20:27:24,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:27:24,087 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:27:24,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:27:24,686 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:27:24,686 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:27:24,687 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [59468408] [2024-06-27 20:27:24,687 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [59468408] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:27:24,687 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:27:24,687 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:27:24,687 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [758160762] [2024-06-27 20:27:24,687 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:27:24,687 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:27:24,687 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:27:24,688 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:27:24,688 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:27:24,771 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-27 20:27:24,772 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 182 places, 228 transitions, 2244 flow. Second operand has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 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) [2024-06-27 20:27:24,772 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:27:24,772 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-27 20:27:24,772 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:27:25,305 INFO L124 PetriNetUnfolderBase]: 2092/3407 cut-off events. [2024-06-27 20:27:25,306 INFO L125 PetriNetUnfolderBase]: For 262168/262171 co-relation queries the response was YES. [2024-06-27 20:27:25,324 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27394 conditions, 3407 events. 2092/3407 cut-off events. For 262168/262171 co-relation queries the response was YES. Maximal size of possible extension queue 201. Compared 19549 event pairs, 544 based on Foata normal form. 6/3410 useless extension candidates. Maximal degree in co-relation 27312. Up to 3035 conditions per place. [2024-06-27 20:27:25,338 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 190 selfloop transitions, 43 changer transitions 0/244 dead transitions. [2024-06-27 20:27:25,339 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 189 places, 244 transitions, 2872 flow [2024-06-27 20:27:25,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:27:25,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:27:25,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 149 transitions. [2024-06-27 20:27:25,340 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44345238095238093 [2024-06-27 20:27:25,340 INFO L175 Difference]: Start difference. First operand has 182 places, 228 transitions, 2244 flow. Second operand 8 states and 149 transitions. [2024-06-27 20:27:25,340 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 189 places, 244 transitions, 2872 flow [2024-06-27 20:27:25,558 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 186 places, 244 transitions, 2746 flow, removed 54 selfloop flow, removed 3 redundant places. [2024-06-27 20:27:25,561 INFO L231 Difference]: Finished difference. Result has 187 places, 228 transitions, 2211 flow [2024-06-27 20:27:25,561 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2118, PETRI_DIFFERENCE_MINUEND_PLACES=179, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=228, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=185, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2211, PETRI_PLACES=187, PETRI_TRANSITIONS=228} [2024-06-27 20:27:25,562 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 144 predicate places. [2024-06-27 20:27:25,562 INFO L495 AbstractCegarLoop]: Abstraction has has 187 places, 228 transitions, 2211 flow [2024-06-27 20:27:25,562 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 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) [2024-06-27 20:27:25,562 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:27:25,562 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:27:25,562 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-27 20:27:25,562 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:27:25,563 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:27:25,563 INFO L85 PathProgramCache]: Analyzing trace with hash 1219945818, now seen corresponding path program 4 times [2024-06-27 20:27:25,563 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:27:25,563 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [960029572] [2024-06-27 20:27:25,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:27:25,563 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:27:25,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:27:26,265 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:27:26,265 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:27:26,265 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [960029572] [2024-06-27 20:27:26,265 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [960029572] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:27:26,265 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:27:26,265 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:27:26,265 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [756095008] [2024-06-27 20:27:26,265 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:27:26,265 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:27:26,266 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:27:26,266 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:27:26,266 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:27:26,325 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-27 20:27:26,326 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 187 places, 228 transitions, 2211 flow. Second operand has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 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) [2024-06-27 20:27:26,326 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:27:26,326 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-27 20:27:26,326 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:27:26,925 INFO L124 PetriNetUnfolderBase]: 2080/3393 cut-off events. [2024-06-27 20:27:26,925 INFO L125 PetriNetUnfolderBase]: For 264112/264115 co-relation queries the response was YES. [2024-06-27 20:27:26,941 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27146 conditions, 3393 events. 2080/3393 cut-off events. For 264112/264115 co-relation queries the response was YES. Maximal size of possible extension queue 201. Compared 19464 event pairs, 548 based on Foata normal form. 6/3396 useless extension candidates. Maximal degree in co-relation 27062. Up to 3027 conditions per place. [2024-06-27 20:27:26,954 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 192 selfloop transitions, 40 changer transitions 0/243 dead transitions. [2024-06-27 20:27:26,954 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 194 places, 243 transitions, 2733 flow [2024-06-27 20:27:26,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:27:26,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:27:26,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 150 transitions. [2024-06-27 20:27:26,955 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44642857142857145 [2024-06-27 20:27:26,956 INFO L175 Difference]: Start difference. First operand has 187 places, 228 transitions, 2211 flow. Second operand 8 states and 150 transitions. [2024-06-27 20:27:26,956 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 194 places, 243 transitions, 2733 flow [2024-06-27 20:27:27,199 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 188 places, 243 transitions, 2617 flow, removed 22 selfloop flow, removed 6 redundant places. [2024-06-27 20:27:27,201 INFO L231 Difference]: Finished difference. Result has 189 places, 228 transitions, 2181 flow [2024-06-27 20:27:27,202 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2095, PETRI_DIFFERENCE_MINUEND_PLACES=181, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=228, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=188, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2181, PETRI_PLACES=189, PETRI_TRANSITIONS=228} [2024-06-27 20:27:27,202 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 146 predicate places. [2024-06-27 20:27:27,202 INFO L495 AbstractCegarLoop]: Abstraction has has 189 places, 228 transitions, 2181 flow [2024-06-27 20:27:27,202 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 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) [2024-06-27 20:27:27,202 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:27:27,202 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:27:27,202 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-06-27 20:27:27,203 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:27:27,203 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:27:27,203 INFO L85 PathProgramCache]: Analyzing trace with hash -952430636, now seen corresponding path program 1 times [2024-06-27 20:27:27,203 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:27:27,203 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [34959491] [2024-06-27 20:27:27,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:27:27,203 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:27:27,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:27:27,977 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:27:27,977 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:27:27,977 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [34959491] [2024-06-27 20:27:27,977 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [34959491] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:27:27,978 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:27:27,978 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:27:27,978 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1427957520] [2024-06-27 20:27:27,978 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:27:27,978 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:27:27,978 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:27:27,979 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:27:27,979 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:27:28,085 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-27 20:27:28,086 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 189 places, 228 transitions, 2181 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:27:28,086 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:27:28,086 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-27 20:27:28,086 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:27:28,643 INFO L124 PetriNetUnfolderBase]: 2208/3511 cut-off events. [2024-06-27 20:27:28,643 INFO L125 PetriNetUnfolderBase]: For 267927/267927 co-relation queries the response was YES. [2024-06-27 20:27:28,663 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27976 conditions, 3511 events. 2208/3511 cut-off events. For 267927/267927 co-relation queries the response was YES. Maximal size of possible extension queue 198. Compared 19526 event pairs, 601 based on Foata normal form. 1/3510 useless extension candidates. Maximal degree in co-relation 27891. Up to 3317 conditions per place. [2024-06-27 20:27:28,677 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 218 selfloop transitions, 20 changer transitions 0/243 dead transitions. [2024-06-27 20:27:28,677 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 197 places, 243 transitions, 2755 flow [2024-06-27 20:27:28,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:27:28,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:27:28,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 147 transitions. [2024-06-27 20:27:28,678 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3888888888888889 [2024-06-27 20:27:28,678 INFO L175 Difference]: Start difference. First operand has 189 places, 228 transitions, 2181 flow. Second operand 9 states and 147 transitions. [2024-06-27 20:27:28,678 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 197 places, 243 transitions, 2755 flow [2024-06-27 20:27:28,977 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 189 places, 243 transitions, 2631 flow, removed 5 selfloop flow, removed 8 redundant places. [2024-06-27 20:27:28,980 INFO L231 Difference]: Finished difference. Result has 190 places, 231 transitions, 2179 flow [2024-06-27 20:27:28,980 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2057, PETRI_DIFFERENCE_MINUEND_PLACES=181, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=228, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=208, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2179, PETRI_PLACES=190, PETRI_TRANSITIONS=231} [2024-06-27 20:27:28,980 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 147 predicate places. [2024-06-27 20:27:28,981 INFO L495 AbstractCegarLoop]: Abstraction has has 190 places, 231 transitions, 2179 flow [2024-06-27 20:27:28,981 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:27:28,981 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:27:28,981 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:27:28,981 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-06-27 20:27:28,981 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:27:28,982 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:27:28,982 INFO L85 PathProgramCache]: Analyzing trace with hash -1314569218, now seen corresponding path program 1 times [2024-06-27 20:27:28,982 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:27:28,982 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2128344559] [2024-06-27 20:27:28,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:27:28,982 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:27:28,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:27:29,626 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:27:29,626 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:27:29,626 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2128344559] [2024-06-27 20:27:29,626 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2128344559] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:27:29,627 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:27:29,627 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:27:29,627 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1305293046] [2024-06-27 20:27:29,627 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:27:29,627 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:27:29,627 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:27:29,628 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:27:29,628 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:27:29,723 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-27 20:27:29,723 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 190 places, 231 transitions, 2179 flow. Second operand has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 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) [2024-06-27 20:27:29,723 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:27:29,723 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-27 20:27:29,723 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:27:30,370 INFO L124 PetriNetUnfolderBase]: 2176/3502 cut-off events. [2024-06-27 20:27:30,371 INFO L125 PetriNetUnfolderBase]: For 289387/289390 co-relation queries the response was YES. [2024-06-27 20:27:30,391 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28287 conditions, 3502 events. 2176/3502 cut-off events. For 289387/289390 co-relation queries the response was YES. Maximal size of possible extension queue 203. Compared 19759 event pairs, 446 based on Foata normal form. 12/3507 useless extension candidates. Maximal degree in co-relation 28201. Up to 3000 conditions per place. [2024-06-27 20:27:30,404 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 218 selfloop transitions, 25 changer transitions 0/266 dead transitions. [2024-06-27 20:27:30,405 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 197 places, 266 transitions, 2847 flow [2024-06-27 20:27:30,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:27:30,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:27:30,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 163 transitions. [2024-06-27 20:27:30,406 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4851190476190476 [2024-06-27 20:27:30,406 INFO L175 Difference]: Start difference. First operand has 190 places, 231 transitions, 2179 flow. Second operand 8 states and 163 transitions. [2024-06-27 20:27:30,406 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 197 places, 266 transitions, 2847 flow [2024-06-27 20:27:30,612 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 187 places, 266 transitions, 2677 flow, removed 35 selfloop flow, removed 10 redundant places. [2024-06-27 20:27:30,615 INFO L231 Difference]: Finished difference. Result has 189 places, 235 transitions, 2150 flow [2024-06-27 20:27:30,615 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2009, PETRI_DIFFERENCE_MINUEND_PLACES=180, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=231, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=206, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2150, PETRI_PLACES=189, PETRI_TRANSITIONS=235} [2024-06-27 20:27:30,616 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 146 predicate places. [2024-06-27 20:27:30,616 INFO L495 AbstractCegarLoop]: Abstraction has has 189 places, 235 transitions, 2150 flow [2024-06-27 20:27:30,616 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 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) [2024-06-27 20:27:30,616 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:27:30,616 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:27:30,616 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-06-27 20:27:30,616 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:27:30,617 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:27:30,617 INFO L85 PathProgramCache]: Analyzing trace with hash -694984988, now seen corresponding path program 2 times [2024-06-27 20:27:30,617 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:27:30,617 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1101318612] [2024-06-27 20:27:30,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:27:30,617 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:27:30,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:27:31,201 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:27:31,202 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:27:31,202 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1101318612] [2024-06-27 20:27:31,202 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1101318612] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:27:31,202 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:27:31,202 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:27:31,202 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2106450202] [2024-06-27 20:27:31,202 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:27:31,203 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:27:31,203 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:27:31,203 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:27:31,203 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:27:31,273 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-27 20:27:31,274 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 189 places, 235 transitions, 2150 flow. Second operand has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 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) [2024-06-27 20:27:31,274 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:27:31,274 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-27 20:27:31,274 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:27:31,915 INFO L124 PetriNetUnfolderBase]: 2218/3570 cut-off events. [2024-06-27 20:27:31,915 INFO L125 PetriNetUnfolderBase]: For 304694/304697 co-relation queries the response was YES. [2024-06-27 20:27:31,935 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29334 conditions, 3570 events. 2218/3570 cut-off events. For 304694/304697 co-relation queries the response was YES. Maximal size of possible extension queue 207. Compared 20284 event pairs, 585 based on Foata normal form. 14/3577 useless extension candidates. Maximal degree in co-relation 29247. Up to 3099 conditions per place. [2024-06-27 20:27:31,949 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 217 selfloop transitions, 26 changer transitions 0/266 dead transitions. [2024-06-27 20:27:31,949 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 196 places, 266 transitions, 2820 flow [2024-06-27 20:27:31,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:27:31,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:27:31,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 162 transitions. [2024-06-27 20:27:31,950 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48214285714285715 [2024-06-27 20:27:31,950 INFO L175 Difference]: Start difference. First operand has 189 places, 235 transitions, 2150 flow. Second operand 8 states and 162 transitions. [2024-06-27 20:27:31,950 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 196 places, 266 transitions, 2820 flow [2024-06-27 20:27:32,195 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 191 places, 266 transitions, 2729 flow, removed 24 selfloop flow, removed 5 redundant places. [2024-06-27 20:27:32,198 INFO L231 Difference]: Finished difference. Result has 192 places, 237 transitions, 2183 flow [2024-06-27 20:27:32,198 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2059, PETRI_DIFFERENCE_MINUEND_PLACES=184, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=235, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=209, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2183, PETRI_PLACES=192, PETRI_TRANSITIONS=237} [2024-06-27 20:27:32,198 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 149 predicate places. [2024-06-27 20:27:32,198 INFO L495 AbstractCegarLoop]: Abstraction has has 192 places, 237 transitions, 2183 flow [2024-06-27 20:27:32,198 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 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) [2024-06-27 20:27:32,199 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:27:32,199 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:27:32,199 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-06-27 20:27:32,199 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:27:32,199 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:27:32,199 INFO L85 PathProgramCache]: Analyzing trace with hash -694974076, now seen corresponding path program 1 times [2024-06-27 20:27:32,199 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:27:32,199 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1873290422] [2024-06-27 20:27:32,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:27:32,200 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:27:32,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:27:32,812 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:27:32,812 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:27:32,812 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1873290422] [2024-06-27 20:27:32,812 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1873290422] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:27:32,812 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:27:32,812 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:27:32,813 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [907495268] [2024-06-27 20:27:32,813 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:27:32,813 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:27:32,813 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:27:32,813 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:27:32,813 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:27:32,914 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-27 20:27:32,914 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 192 places, 237 transitions, 2183 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:27:32,914 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:27:32,914 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-27 20:27:32,914 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:27:33,541 INFO L124 PetriNetUnfolderBase]: 2303/3663 cut-off events. [2024-06-27 20:27:33,541 INFO L125 PetriNetUnfolderBase]: For 300379/300382 co-relation queries the response was YES. [2024-06-27 20:27:33,561 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30038 conditions, 3663 events. 2303/3663 cut-off events. For 300379/300382 co-relation queries the response was YES. Maximal size of possible extension queue 207. Compared 20469 event pairs, 616 based on Foata normal form. 5/3665 useless extension candidates. Maximal degree in co-relation 29950. Up to 3366 conditions per place. [2024-06-27 20:27:33,575 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 231 selfloop transitions, 32 changer transitions 0/268 dead transitions. [2024-06-27 20:27:33,575 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 200 places, 268 transitions, 2889 flow [2024-06-27 20:27:33,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:27:33,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:27:33,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 169 transitions. [2024-06-27 20:27:33,576 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4470899470899471 [2024-06-27 20:27:33,577 INFO L175 Difference]: Start difference. First operand has 192 places, 237 transitions, 2183 flow. Second operand 9 states and 169 transitions. [2024-06-27 20:27:33,577 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 200 places, 268 transitions, 2889 flow [2024-06-27 20:27:33,873 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 194 places, 268 transitions, 2799 flow, removed 21 selfloop flow, removed 6 redundant places. [2024-06-27 20:27:33,876 INFO L231 Difference]: Finished difference. Result has 195 places, 241 transitions, 2262 flow [2024-06-27 20:27:33,876 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2093, PETRI_DIFFERENCE_MINUEND_PLACES=186, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=237, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=205, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2262, PETRI_PLACES=195, PETRI_TRANSITIONS=241} [2024-06-27 20:27:33,876 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 152 predicate places. [2024-06-27 20:27:33,876 INFO L495 AbstractCegarLoop]: Abstraction has has 195 places, 241 transitions, 2262 flow [2024-06-27 20:27:33,877 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:27:33,877 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:27:33,877 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:27:33,877 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-06-27 20:27:33,877 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:27:33,877 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:27:33,878 INFO L85 PathProgramCache]: Analyzing trace with hash -1196124046, now seen corresponding path program 1 times [2024-06-27 20:27:33,878 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:27:33,878 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1001076127] [2024-06-27 20:27:33,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:27:33,878 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:27:33,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:27:34,518 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:27:34,518 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:27:34,518 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1001076127] [2024-06-27 20:27:34,518 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1001076127] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:27:34,518 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:27:34,518 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:27:34,518 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [575688008] [2024-06-27 20:27:34,518 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:27:34,518 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:27:34,518 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:27:34,519 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:27:34,519 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:27:34,628 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-27 20:27:34,628 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 195 places, 241 transitions, 2262 flow. Second operand has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 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) [2024-06-27 20:27:34,628 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:27:34,628 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-27 20:27:34,628 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:27:35,272 INFO L124 PetriNetUnfolderBase]: 2240/3599 cut-off events. [2024-06-27 20:27:35,273 INFO L125 PetriNetUnfolderBase]: For 311329/311329 co-relation queries the response was YES. [2024-06-27 20:27:35,294 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30316 conditions, 3599 events. 2240/3599 cut-off events. For 311329/311329 co-relation queries the response was YES. Maximal size of possible extension queue 209. Compared 20382 event pairs, 592 based on Foata normal form. 2/3592 useless extension candidates. Maximal degree in co-relation 30227. Up to 3107 conditions per place. [2024-06-27 20:27:35,309 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 208 selfloop transitions, 37 changer transitions 0/268 dead transitions. [2024-06-27 20:27:35,309 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 202 places, 268 transitions, 2906 flow [2024-06-27 20:27:35,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:27:35,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:27:35,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 160 transitions. [2024-06-27 20:27:35,310 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47619047619047616 [2024-06-27 20:27:35,310 INFO L175 Difference]: Start difference. First operand has 195 places, 241 transitions, 2262 flow. Second operand 8 states and 160 transitions. [2024-06-27 20:27:35,310 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 202 places, 268 transitions, 2906 flow [2024-06-27 20:27:35,599 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 195 places, 268 transitions, 2765 flow, removed 41 selfloop flow, removed 7 redundant places. [2024-06-27 20:27:35,602 INFO L231 Difference]: Finished difference. Result has 196 places, 245 transitions, 2306 flow [2024-06-27 20:27:35,602 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2121, PETRI_DIFFERENCE_MINUEND_PLACES=188, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=241, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=204, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2306, PETRI_PLACES=196, PETRI_TRANSITIONS=245} [2024-06-27 20:27:35,602 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 153 predicate places. [2024-06-27 20:27:35,603 INFO L495 AbstractCegarLoop]: Abstraction has has 196 places, 245 transitions, 2306 flow [2024-06-27 20:27:35,603 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 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) [2024-06-27 20:27:35,603 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:27:35,603 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:27:35,603 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2024-06-27 20:27:35,603 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:27:35,603 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:27:35,604 INFO L85 PathProgramCache]: Analyzing trace with hash -1196119210, now seen corresponding path program 1 times [2024-06-27 20:27:35,604 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:27:35,604 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1616201811] [2024-06-27 20:27:35,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:27:35,604 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:27:35,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:27:36,219 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:27:36,220 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:27:36,220 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1616201811] [2024-06-27 20:27:36,220 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1616201811] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:27:36,220 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:27:36,220 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:27:36,220 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1524574687] [2024-06-27 20:27:36,220 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:27:36,221 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:27:36,221 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:27:36,221 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:27:36,221 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:27:36,291 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-27 20:27:36,291 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 196 places, 245 transitions, 2306 flow. Second operand has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:27:36,291 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:27:36,291 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-27 20:27:36,291 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:27:36,960 INFO L124 PetriNetUnfolderBase]: 2333/3705 cut-off events. [2024-06-27 20:27:36,961 INFO L125 PetriNetUnfolderBase]: For 326031/326034 co-relation queries the response was YES. [2024-06-27 20:27:36,982 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31474 conditions, 3705 events. 2333/3705 cut-off events. For 326031/326034 co-relation queries the response was YES. Maximal size of possible extension queue 211. Compared 20737 event pairs, 610 based on Foata normal form. 6/3708 useless extension candidates. Maximal degree in co-relation 31384. Up to 3411 conditions per place. [2024-06-27 20:27:36,999 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 239 selfloop transitions, 27 changer transitions 0/271 dead transitions. [2024-06-27 20:27:36,999 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 203 places, 271 transitions, 2977 flow [2024-06-27 20:27:36,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:27:36,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:27:37,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 150 transitions. [2024-06-27 20:27:37,000 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44642857142857145 [2024-06-27 20:27:37,000 INFO L175 Difference]: Start difference. First operand has 196 places, 245 transitions, 2306 flow. Second operand 8 states and 150 transitions. [2024-06-27 20:27:37,000 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 203 places, 271 transitions, 2977 flow [2024-06-27 20:27:37,292 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 196 places, 271 transitions, 2803 flow, removed 44 selfloop flow, removed 7 redundant places. [2024-06-27 20:27:37,307 INFO L231 Difference]: Finished difference. Result has 197 places, 249 transitions, 2270 flow [2024-06-27 20:27:37,307 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2132, PETRI_DIFFERENCE_MINUEND_PLACES=189, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=245, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=218, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2270, PETRI_PLACES=197, PETRI_TRANSITIONS=249} [2024-06-27 20:27:37,308 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 154 predicate places. [2024-06-27 20:27:37,309 INFO L495 AbstractCegarLoop]: Abstraction has has 197 places, 249 transitions, 2270 flow [2024-06-27 20:27:37,309 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:27:37,309 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:27:37,309 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:27:37,309 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2024-06-27 20:27:37,309 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:27:37,309 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:27:37,309 INFO L85 PathProgramCache]: Analyzing trace with hash -1018750540, now seen corresponding path program 2 times [2024-06-27 20:27:37,310 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:27:37,310 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [414895816] [2024-06-27 20:27:37,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:27:37,310 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:27:37,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:27:37,888 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:27:37,888 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:27:37,888 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [414895816] [2024-06-27 20:27:37,888 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [414895816] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:27:37,889 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:27:37,889 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:27:37,889 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2140624373] [2024-06-27 20:27:37,889 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:27:37,889 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:27:37,889 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:27:37,890 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:27:37,890 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:27:37,976 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-27 20:27:37,976 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 197 places, 249 transitions, 2270 flow. Second operand has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:27:37,976 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:27:37,976 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-27 20:27:37,976 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:27:38,657 INFO L124 PetriNetUnfolderBase]: 2353/3739 cut-off events. [2024-06-27 20:27:38,657 INFO L125 PetriNetUnfolderBase]: For 336746/336749 co-relation queries the response was YES. [2024-06-27 20:27:38,678 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31755 conditions, 3739 events. 2353/3739 cut-off events. For 336746/336749 co-relation queries the response was YES. Maximal size of possible extension queue 214. Compared 20957 event pairs, 601 based on Foata normal form. 6/3742 useless extension candidates. Maximal degree in co-relation 31664. Up to 3299 conditions per place. [2024-06-27 20:27:38,692 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 214 selfloop transitions, 55 changer transitions 0/274 dead transitions. [2024-06-27 20:27:38,693 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 204 places, 274 transitions, 3077 flow [2024-06-27 20:27:38,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:27:38,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:27:38,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 151 transitions. [2024-06-27 20:27:38,694 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4494047619047619 [2024-06-27 20:27:38,694 INFO L175 Difference]: Start difference. First operand has 197 places, 249 transitions, 2270 flow. Second operand 8 states and 151 transitions. [2024-06-27 20:27:38,694 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 204 places, 274 transitions, 3077 flow [2024-06-27 20:27:38,941 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 198 places, 274 transitions, 2984 flow, removed 22 selfloop flow, removed 6 redundant places. [2024-06-27 20:27:38,943 INFO L231 Difference]: Finished difference. Result has 199 places, 253 transitions, 2376 flow [2024-06-27 20:27:38,944 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2177, PETRI_DIFFERENCE_MINUEND_PLACES=191, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=249, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=197, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2376, PETRI_PLACES=199, PETRI_TRANSITIONS=253} [2024-06-27 20:27:38,944 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 156 predicate places. [2024-06-27 20:27:38,944 INFO L495 AbstractCegarLoop]: Abstraction has has 199 places, 253 transitions, 2376 flow [2024-06-27 20:27:38,944 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:27:38,944 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:27:38,945 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:27:38,945 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2024-06-27 20:27:38,946 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:27:38,946 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:27:38,946 INFO L85 PathProgramCache]: Analyzing trace with hash -1018987690, now seen corresponding path program 3 times [2024-06-27 20:27:38,946 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:27:38,946 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [458084547] [2024-06-27 20:27:38,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:27:38,946 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:27:38,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:27:39,600 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:27:39,601 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:27:39,601 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [458084547] [2024-06-27 20:27:39,601 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [458084547] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:27:39,601 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:27:39,601 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:27:39,601 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1884910307] [2024-06-27 20:27:39,601 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:27:39,602 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:27:39,602 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:27:39,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:27:39,602 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:27:39,662 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-27 20:27:39,662 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 199 places, 253 transitions, 2376 flow. Second operand has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:27:39,663 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:27:39,663 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-27 20:27:39,663 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:27:40,336 INFO L124 PetriNetUnfolderBase]: 2357/3753 cut-off events. [2024-06-27 20:27:40,336 INFO L125 PetriNetUnfolderBase]: For 344047/344050 co-relation queries the response was YES. [2024-06-27 20:27:40,359 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31951 conditions, 3753 events. 2357/3753 cut-off events. For 344047/344050 co-relation queries the response was YES. Maximal size of possible extension queue 217. Compared 21088 event pairs, 615 based on Foata normal form. 6/3756 useless extension candidates. Maximal degree in co-relation 31859. Up to 3300 conditions per place. [2024-06-27 20:27:40,374 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 215 selfloop transitions, 57 changer transitions 0/277 dead transitions. [2024-06-27 20:27:40,375 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 206 places, 277 transitions, 3185 flow [2024-06-27 20:27:40,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:27:40,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:27:40,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 152 transitions. [2024-06-27 20:27:40,376 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4523809523809524 [2024-06-27 20:27:40,376 INFO L175 Difference]: Start difference. First operand has 199 places, 253 transitions, 2376 flow. Second operand 8 states and 152 transitions. [2024-06-27 20:27:40,376 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 206 places, 277 transitions, 3185 flow [2024-06-27 20:27:40,656 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 201 places, 277 transitions, 3056 flow, removed 26 selfloop flow, removed 5 redundant places. [2024-06-27 20:27:40,659 INFO L231 Difference]: Finished difference. Result has 202 places, 256 transitions, 2441 flow [2024-06-27 20:27:40,659 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2249, PETRI_DIFFERENCE_MINUEND_PLACES=194, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=253, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=198, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2441, PETRI_PLACES=202, PETRI_TRANSITIONS=256} [2024-06-27 20:27:40,660 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 159 predicate places. [2024-06-27 20:27:40,660 INFO L495 AbstractCegarLoop]: Abstraction has has 202 places, 256 transitions, 2441 flow [2024-06-27 20:27:40,660 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:27:40,660 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:27:40,665 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:27:40,665 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2024-06-27 20:27:40,665 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:27:40,665 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:27:40,665 INFO L85 PathProgramCache]: Analyzing trace with hash -1019111008, now seen corresponding path program 3 times [2024-06-27 20:27:40,666 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:27:40,666 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2037166621] [2024-06-27 20:27:40,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:27:40,666 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:27:40,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:27:41,389 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:27:41,389 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:27:41,390 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2037166621] [2024-06-27 20:27:41,390 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2037166621] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:27:41,390 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:27:41,390 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:27:41,390 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [414925435] [2024-06-27 20:27:41,390 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:27:41,390 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:27:41,390 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:27:41,391 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:27:41,391 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:27:41,482 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-27 20:27:41,482 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 202 places, 256 transitions, 2441 flow. Second operand has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 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) [2024-06-27 20:27:41,482 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:27:41,483 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-27 20:27:41,483 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:27:42,100 INFO L124 PetriNetUnfolderBase]: 2327/3751 cut-off events. [2024-06-27 20:27:42,100 INFO L125 PetriNetUnfolderBase]: For 376872/376883 co-relation queries the response was YES. [2024-06-27 20:27:42,123 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32389 conditions, 3751 events. 2327/3751 cut-off events. For 376872/376883 co-relation queries the response was YES. Maximal size of possible extension queue 224. Compared 21613 event pairs, 577 based on Foata normal form. 22/3752 useless extension candidates. Maximal degree in co-relation 32296. Up to 3202 conditions per place. [2024-06-27 20:27:42,137 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 218 selfloop transitions, 38 changer transitions 0/282 dead transitions. [2024-06-27 20:27:42,137 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 209 places, 282 transitions, 3147 flow [2024-06-27 20:27:42,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:27:42,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:27:42,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 158 transitions. [2024-06-27 20:27:42,138 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47023809523809523 [2024-06-27 20:27:42,138 INFO L175 Difference]: Start difference. First operand has 202 places, 256 transitions, 2441 flow. Second operand 8 states and 158 transitions. [2024-06-27 20:27:42,138 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 209 places, 282 transitions, 3147 flow [2024-06-27 20:27:42,436 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 204 places, 282 transitions, 3020 flow, removed 27 selfloop flow, removed 5 redundant places. [2024-06-27 20:27:42,439 INFO L231 Difference]: Finished difference. Result has 205 places, 258 transitions, 2470 flow [2024-06-27 20:27:42,440 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2314, PETRI_DIFFERENCE_MINUEND_PLACES=197, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=256, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=218, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2470, PETRI_PLACES=205, PETRI_TRANSITIONS=258} [2024-06-27 20:27:42,440 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 162 predicate places. [2024-06-27 20:27:42,440 INFO L495 AbstractCegarLoop]: Abstraction has has 205 places, 258 transitions, 2470 flow [2024-06-27 20:27:42,440 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 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) [2024-06-27 20:27:42,440 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:27:42,440 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:27:42,440 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2024-06-27 20:27:42,441 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:27:42,441 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:27:42,441 INFO L85 PathProgramCache]: Analyzing trace with hash -1018742046, now seen corresponding path program 2 times [2024-06-27 20:27:42,441 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:27:42,441 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1148730804] [2024-06-27 20:27:42,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:27:42,441 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:27:42,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:27:43,073 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:27:43,073 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:27:43,074 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1148730804] [2024-06-27 20:27:43,074 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1148730804] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:27:43,074 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:27:43,074 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:27:43,074 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1414036937] [2024-06-27 20:27:43,074 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:27:43,074 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:27:43,075 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:27:43,075 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:27:43,075 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:27:43,169 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-27 20:27:43,169 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 205 places, 258 transitions, 2470 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:27:43,169 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:27:43,169 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-27 20:27:43,170 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:27:43,840 INFO L124 PetriNetUnfolderBase]: 2460/3907 cut-off events. [2024-06-27 20:27:43,841 INFO L125 PetriNetUnfolderBase]: For 375968/375971 co-relation queries the response was YES. [2024-06-27 20:27:43,864 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33844 conditions, 3907 events. 2460/3907 cut-off events. For 375968/375971 co-relation queries the response was YES. Maximal size of possible extension queue 228. Compared 22131 event pairs, 600 based on Foata normal form. 5/3909 useless extension candidates. Maximal degree in co-relation 33750. Up to 3353 conditions per place. [2024-06-27 20:27:43,881 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 221 selfloop transitions, 65 changer transitions 0/291 dead transitions. [2024-06-27 20:27:43,881 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 213 places, 291 transitions, 3618 flow [2024-06-27 20:27:43,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:27:43,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:27:43,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 169 transitions. [2024-06-27 20:27:43,887 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4470899470899471 [2024-06-27 20:27:43,887 INFO L175 Difference]: Start difference. First operand has 205 places, 258 transitions, 2470 flow. Second operand 9 states and 169 transitions. [2024-06-27 20:27:43,887 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 213 places, 291 transitions, 3618 flow [2024-06-27 20:27:44,190 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 207 places, 291 transitions, 3500 flow, removed 23 selfloop flow, removed 6 redundant places. [2024-06-27 20:27:44,193 INFO L231 Difference]: Finished difference. Result has 209 places, 266 transitions, 2710 flow [2024-06-27 20:27:44,193 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2352, PETRI_DIFFERENCE_MINUEND_PLACES=199, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=258, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=196, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2710, PETRI_PLACES=209, PETRI_TRANSITIONS=266} [2024-06-27 20:27:44,195 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 166 predicate places. [2024-06-27 20:27:44,195 INFO L495 AbstractCegarLoop]: Abstraction has has 209 places, 266 transitions, 2710 flow [2024-06-27 20:27:44,195 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:27:44,195 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:27:44,195 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:27:44,196 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2024-06-27 20:27:44,196 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:27:44,196 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:27:44,196 INFO L85 PathProgramCache]: Analyzing trace with hash -408086746, now seen corresponding path program 3 times [2024-06-27 20:27:44,196 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:27:44,196 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [602759308] [2024-06-27 20:27:44,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:27:44,196 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:27:44,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:27:44,895 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:27:44,896 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:27:44,896 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [602759308] [2024-06-27 20:27:44,896 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [602759308] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:27:44,896 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:27:44,896 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:27:44,896 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2072914037] [2024-06-27 20:27:44,896 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:27:44,897 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:27:44,897 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:27:44,897 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:27:44,897 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:27:44,959 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-27 20:27:44,960 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 209 places, 266 transitions, 2710 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:27:44,960 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:27:44,960 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-27 20:27:44,960 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:27:45,628 INFO L124 PetriNetUnfolderBase]: 2491/3958 cut-off events. [2024-06-27 20:27:45,628 INFO L125 PetriNetUnfolderBase]: For 397200/397203 co-relation queries the response was YES. [2024-06-27 20:27:45,653 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35157 conditions, 3958 events. 2491/3958 cut-off events. For 397200/397203 co-relation queries the response was YES. Maximal size of possible extension queue 232. Compared 22467 event pairs, 625 based on Foata normal form. 5/3960 useless extension candidates. Maximal degree in co-relation 35061. Up to 3382 conditions per place. [2024-06-27 20:27:45,670 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 220 selfloop transitions, 73 changer transitions 0/298 dead transitions. [2024-06-27 20:27:45,670 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 217 places, 298 transitions, 3866 flow [2024-06-27 20:27:45,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:27:45,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:27:45,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 171 transitions. [2024-06-27 20:27:45,671 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4523809523809524 [2024-06-27 20:27:45,671 INFO L175 Difference]: Start difference. First operand has 209 places, 266 transitions, 2710 flow. Second operand 9 states and 171 transitions. [2024-06-27 20:27:45,671 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 217 places, 298 transitions, 3866 flow [2024-06-27 20:27:46,060 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 212 places, 298 transitions, 3663 flow, removed 69 selfloop flow, removed 5 redundant places. [2024-06-27 20:27:46,063 INFO L231 Difference]: Finished difference. Result has 213 places, 274 transitions, 2892 flow [2024-06-27 20:27:46,064 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2531, PETRI_DIFFERENCE_MINUEND_PLACES=204, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=266, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=200, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2892, PETRI_PLACES=213, PETRI_TRANSITIONS=274} [2024-06-27 20:27:46,064 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 170 predicate places. [2024-06-27 20:27:46,064 INFO L495 AbstractCegarLoop]: Abstraction has has 213 places, 274 transitions, 2892 flow [2024-06-27 20:27:46,064 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:27:46,064 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:27:46,064 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:27:46,065 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2024-06-27 20:27:46,065 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:27:46,065 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:27:46,065 INFO L85 PathProgramCache]: Analyzing trace with hash -407728262, now seen corresponding path program 1 times [2024-06-27 20:27:46,065 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:27:46,065 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2086748456] [2024-06-27 20:27:46,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:27:46,065 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:27:46,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:27:46,724 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:27:46,724 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:27:46,724 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2086748456] [2024-06-27 20:27:46,725 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2086748456] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:27:46,725 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:27:46,725 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:27:46,725 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2086687741] [2024-06-27 20:27:46,725 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:27:46,725 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:27:46,725 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:27:46,726 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:27:46,726 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:27:46,818 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-27 20:27:46,819 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 213 places, 274 transitions, 2892 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:27:46,819 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:27:46,819 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-27 20:27:46,819 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:27:47,432 INFO L124 PetriNetUnfolderBase]: 2496/3948 cut-off events. [2024-06-27 20:27:47,432 INFO L125 PetriNetUnfolderBase]: For 404035/404035 co-relation queries the response was YES. [2024-06-27 20:27:47,458 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35494 conditions, 3948 events. 2496/3948 cut-off events. For 404035/404035 co-relation queries the response was YES. Maximal size of possible extension queue 232. Compared 22219 event pairs, 641 based on Foata normal form. 1/3947 useless extension candidates. Maximal degree in co-relation 35396. Up to 3726 conditions per place. [2024-06-27 20:27:47,475 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 270 selfloop transitions, 20 changer transitions 0/295 dead transitions. [2024-06-27 20:27:47,475 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 221 places, 295 transitions, 3610 flow [2024-06-27 20:27:47,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:27:47,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:27:47,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 153 transitions. [2024-06-27 20:27:47,476 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40476190476190477 [2024-06-27 20:27:47,476 INFO L175 Difference]: Start difference. First operand has 213 places, 274 transitions, 2892 flow. Second operand 9 states and 153 transitions. [2024-06-27 20:27:47,476 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 221 places, 295 transitions, 3610 flow [2024-06-27 20:27:47,826 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 217 places, 295 transitions, 3494 flow, removed 46 selfloop flow, removed 4 redundant places. [2024-06-27 20:27:47,829 INFO L231 Difference]: Finished difference. Result has 218 places, 277 transitions, 2922 flow [2024-06-27 20:27:47,830 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2776, PETRI_DIFFERENCE_MINUEND_PLACES=209, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=274, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=254, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2922, PETRI_PLACES=218, PETRI_TRANSITIONS=277} [2024-06-27 20:27:47,830 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 175 predicate places. [2024-06-27 20:27:47,830 INFO L495 AbstractCegarLoop]: Abstraction has has 218 places, 277 transitions, 2922 flow [2024-06-27 20:27:47,830 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:27:47,830 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:27:47,830 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:27:47,831 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2024-06-27 20:27:47,831 INFO L420 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:27:47,831 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:27:47,831 INFO L85 PathProgramCache]: Analyzing trace with hash -407740786, now seen corresponding path program 4 times [2024-06-27 20:27:47,831 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:27:47,831 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [834336904] [2024-06-27 20:27:47,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:27:47,831 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:27:47,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:27:48,489 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:27:48,489 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:27:48,489 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [834336904] [2024-06-27 20:27:48,489 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [834336904] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:27:48,489 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:27:48,489 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:27:48,489 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1694120224] [2024-06-27 20:27:48,490 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:27:48,490 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:27:48,490 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:27:48,490 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:27:48,490 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:27:48,580 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-27 20:27:48,580 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 218 places, 277 transitions, 2922 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:27:48,580 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:27:48,580 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-27 20:27:48,580 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:27:49,283 INFO L124 PetriNetUnfolderBase]: 2491/3951 cut-off events. [2024-06-27 20:27:49,283 INFO L125 PetriNetUnfolderBase]: For 406831/406834 co-relation queries the response was YES. [2024-06-27 20:27:49,309 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35576 conditions, 3951 events. 2491/3951 cut-off events. For 406831/406834 co-relation queries the response was YES. Maximal size of possible extension queue 232. Compared 22295 event pairs, 605 based on Foata normal form. 5/3953 useless extension candidates. Maximal degree in co-relation 35476. Up to 3387 conditions per place. [2024-06-27 20:27:49,324 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 224 selfloop transitions, 71 changer transitions 0/300 dead transitions. [2024-06-27 20:27:49,324 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 226 places, 300 transitions, 3728 flow [2024-06-27 20:27:49,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:27:49,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:27:49,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 169 transitions. [2024-06-27 20:27:49,325 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4470899470899471 [2024-06-27 20:27:49,325 INFO L175 Difference]: Start difference. First operand has 218 places, 277 transitions, 2922 flow. Second operand 9 states and 169 transitions. [2024-06-27 20:27:49,326 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 226 places, 300 transitions, 3728 flow [2024-06-27 20:27:49,806 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 219 places, 300 transitions, 3532 flow, removed 80 selfloop flow, removed 7 redundant places. [2024-06-27 20:27:49,809 INFO L231 Difference]: Finished difference. Result has 220 places, 277 transitions, 2875 flow [2024-06-27 20:27:49,809 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2726, PETRI_DIFFERENCE_MINUEND_PLACES=211, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=277, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=206, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2875, PETRI_PLACES=220, PETRI_TRANSITIONS=277} [2024-06-27 20:27:49,809 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 177 predicate places. [2024-06-27 20:27:49,809 INFO L495 AbstractCegarLoop]: Abstraction has has 220 places, 277 transitions, 2875 flow [2024-06-27 20:27:49,810 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:27:49,810 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:27:49,810 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:27:49,810 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2024-06-27 20:27:49,810 INFO L420 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:27:49,810 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:27:49,810 INFO L85 PathProgramCache]: Analyzing trace with hash -581166888, now seen corresponding path program 2 times [2024-06-27 20:27:49,810 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:27:49,811 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2057390985] [2024-06-27 20:27:49,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:27:49,811 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:27:49,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:27:50,459 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:27:50,459 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:27:50,459 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2057390985] [2024-06-27 20:27:50,459 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2057390985] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:27:50,459 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:27:50,459 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:27:50,459 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1316273098] [2024-06-27 20:27:50,459 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:27:50,460 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:27:50,460 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:27:50,460 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:27:50,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:27:50,550 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-27 20:27:50,551 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 220 places, 277 transitions, 2875 flow. Second operand has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 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) [2024-06-27 20:27:50,551 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:27:50,551 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-27 20:27:50,551 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:27:51,341 INFO L124 PetriNetUnfolderBase]: 2401/3844 cut-off events. [2024-06-27 20:27:51,341 INFO L125 PetriNetUnfolderBase]: For 415606/415608 co-relation queries the response was YES. [2024-06-27 20:27:51,366 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35424 conditions, 3844 events. 2401/3844 cut-off events. For 415606/415608 co-relation queries the response was YES. Maximal size of possible extension queue 233. Compared 22016 event pairs, 626 based on Foata normal form. 1/3830 useless extension candidates. Maximal degree in co-relation 35323. Up to 3337 conditions per place. [2024-06-27 20:27:51,381 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 234 selfloop transitions, 40 changer transitions 0/300 dead transitions. [2024-06-27 20:27:51,381 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 227 places, 300 transitions, 3569 flow [2024-06-27 20:27:51,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:27:51,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:27:51,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 157 transitions. [2024-06-27 20:27:51,382 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46726190476190477 [2024-06-27 20:27:51,382 INFO L175 Difference]: Start difference. First operand has 220 places, 277 transitions, 2875 flow. Second operand 8 states and 157 transitions. [2024-06-27 20:27:51,382 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 227 places, 300 transitions, 3569 flow [2024-06-27 20:27:51,867 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 220 places, 300 transitions, 3433 flow, removed 5 selfloop flow, removed 7 redundant places. [2024-06-27 20:27:51,870 INFO L231 Difference]: Finished difference. Result has 221 places, 280 transitions, 2927 flow [2024-06-27 20:27:51,885 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2739, PETRI_DIFFERENCE_MINUEND_PLACES=213, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=277, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=237, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2927, PETRI_PLACES=221, PETRI_TRANSITIONS=280} [2024-06-27 20:27:51,886 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 178 predicate places. [2024-06-27 20:27:51,886 INFO L495 AbstractCegarLoop]: Abstraction has has 221 places, 280 transitions, 2927 flow [2024-06-27 20:27:51,886 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 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) [2024-06-27 20:27:51,886 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:27:51,886 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:27:51,886 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2024-06-27 20:27:51,886 INFO L420 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:27:51,887 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:27:51,887 INFO L85 PathProgramCache]: Analyzing trace with hash 1523426810, now seen corresponding path program 3 times [2024-06-27 20:27:51,887 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:27:51,887 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [854211614] [2024-06-27 20:27:51,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:27:51,887 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:27:51,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:27:52,637 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:27:52,637 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:27:52,637 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [854211614] [2024-06-27 20:27:52,637 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [854211614] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:27:52,637 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:27:52,637 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:27:52,638 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1834395933] [2024-06-27 20:27:52,638 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:27:52,638 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:27:52,638 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:27:52,638 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:27:52,638 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:27:52,748 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-27 20:27:52,748 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 221 places, 280 transitions, 2927 flow. Second operand has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 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) [2024-06-27 20:27:52,748 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:27:52,748 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-27 20:27:52,748 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:27:53,619 INFO L124 PetriNetUnfolderBase]: 2406/3851 cut-off events. [2024-06-27 20:27:53,619 INFO L125 PetriNetUnfolderBase]: For 429758/429760 co-relation queries the response was YES. [2024-06-27 20:27:53,646 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35845 conditions, 3851 events. 2406/3851 cut-off events. For 429758/429760 co-relation queries the response was YES. Maximal size of possible extension queue 234. Compared 22067 event pairs, 626 based on Foata normal form. 1/3837 useless extension candidates. Maximal degree in co-relation 35743. Up to 3344 conditions per place. [2024-06-27 20:27:53,663 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 238 selfloop transitions, 39 changer transitions 0/303 dead transitions. [2024-06-27 20:27:53,664 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 228 places, 303 transitions, 3633 flow [2024-06-27 20:27:53,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:27:53,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:27:53,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 157 transitions. [2024-06-27 20:27:53,665 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46726190476190477 [2024-06-27 20:27:53,665 INFO L175 Difference]: Start difference. First operand has 221 places, 280 transitions, 2927 flow. Second operand 8 states and 157 transitions. [2024-06-27 20:27:53,665 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 228 places, 303 transitions, 3633 flow [2024-06-27 20:27:54,139 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 222 places, 303 transitions, 3463 flow, removed 47 selfloop flow, removed 6 redundant places. [2024-06-27 20:27:54,142 INFO L231 Difference]: Finished difference. Result has 223 places, 283 transitions, 2949 flow [2024-06-27 20:27:54,142 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2757, PETRI_DIFFERENCE_MINUEND_PLACES=215, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=280, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=241, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2949, PETRI_PLACES=223, PETRI_TRANSITIONS=283} [2024-06-27 20:27:54,142 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 180 predicate places. [2024-06-27 20:27:54,143 INFO L495 AbstractCegarLoop]: Abstraction has has 223 places, 283 transitions, 2949 flow [2024-06-27 20:27:54,143 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 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) [2024-06-27 20:27:54,143 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:27:54,143 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:27:54,143 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2024-06-27 20:27:54,143 INFO L420 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:27:54,144 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:27:54,144 INFO L85 PathProgramCache]: Analyzing trace with hash 1762755800, now seen corresponding path program 4 times [2024-06-27 20:27:54,144 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:27:54,144 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1641740813] [2024-06-27 20:27:54,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:27:54,144 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:27:54,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:27:54,999 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:27:55,000 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:27:55,000 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1641740813] [2024-06-27 20:27:55,000 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1641740813] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:27:55,000 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:27:55,000 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:27:55,000 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [664992018] [2024-06-27 20:27:55,000 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:27:55,001 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:27:55,001 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:27:55,001 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:27:55,001 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:27:55,091 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-27 20:27:55,092 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 223 places, 283 transitions, 2949 flow. Second operand has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 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) [2024-06-27 20:27:55,092 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:27:55,092 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-27 20:27:55,092 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:27:55,810 INFO L124 PetriNetUnfolderBase]: 2403/3847 cut-off events. [2024-06-27 20:27:55,810 INFO L125 PetriNetUnfolderBase]: For 440786/440788 co-relation queries the response was YES. [2024-06-27 20:27:55,838 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36089 conditions, 3847 events. 2403/3847 cut-off events. For 440786/440788 co-relation queries the response was YES. Maximal size of possible extension queue 234. Compared 22038 event pairs, 626 based on Foata normal form. 1/3833 useless extension candidates. Maximal degree in co-relation 35986. Up to 3325 conditions per place. [2024-06-27 20:27:55,853 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 225 selfloop transitions, 52 changer transitions 0/303 dead transitions. [2024-06-27 20:27:55,853 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 230 places, 303 transitions, 3653 flow [2024-06-27 20:27:55,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:27:55,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:27:55,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 156 transitions. [2024-06-27 20:27:55,854 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4642857142857143 [2024-06-27 20:27:55,854 INFO L175 Difference]: Start difference. First operand has 223 places, 283 transitions, 2949 flow. Second operand 8 states and 156 transitions. [2024-06-27 20:27:55,854 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 230 places, 303 transitions, 3653 flow [2024-06-27 20:27:56,447 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 224 places, 303 transitions, 3483 flow, removed 48 selfloop flow, removed 6 redundant places. [2024-06-27 20:27:56,451 INFO L231 Difference]: Finished difference. Result has 225 places, 286 transitions, 3003 flow [2024-06-27 20:27:56,451 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2779, PETRI_DIFFERENCE_MINUEND_PLACES=217, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=283, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=231, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3003, PETRI_PLACES=225, PETRI_TRANSITIONS=286} [2024-06-27 20:27:56,451 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 182 predicate places. [2024-06-27 20:27:56,451 INFO L495 AbstractCegarLoop]: Abstraction has has 225 places, 286 transitions, 3003 flow [2024-06-27 20:27:56,452 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 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) [2024-06-27 20:27:56,452 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:27:56,452 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:27:56,452 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2024-06-27 20:27:56,452 INFO L420 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:27:56,452 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:27:56,452 INFO L85 PathProgramCache]: Analyzing trace with hash -1356717070, now seen corresponding path program 4 times [2024-06-27 20:27:56,452 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:27:56,453 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1152690323] [2024-06-27 20:27:56,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:27:56,453 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:27:56,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:27:57,167 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:27:57,167 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:27:57,167 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1152690323] [2024-06-27 20:27:57,167 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1152690323] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:27:57,167 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:27:57,167 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:27:57,167 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [390337092] [2024-06-27 20:27:57,168 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:27:57,168 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:27:57,168 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:27:57,168 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:27:57,168 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:27:57,222 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-27 20:27:57,222 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 225 places, 286 transitions, 3003 flow. Second operand has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:27:57,222 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:27:57,222 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-27 20:27:57,222 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:27:57,957 INFO L124 PetriNetUnfolderBase]: 2484/3926 cut-off events. [2024-06-27 20:27:57,957 INFO L125 PetriNetUnfolderBase]: For 449284/449286 co-relation queries the response was YES. [2024-06-27 20:27:57,983 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36712 conditions, 3926 events. 2484/3926 cut-off events. For 449284/449286 co-relation queries the response was YES. Maximal size of possible extension queue 234. Compared 22008 event pairs, 654 based on Foata normal form. 2/3921 useless extension candidates. Maximal degree in co-relation 36608. Up to 3643 conditions per place. [2024-06-27 20:27:57,999 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 274 selfloop transitions, 26 changer transitions 0/305 dead transitions. [2024-06-27 20:27:57,999 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 232 places, 305 transitions, 3665 flow [2024-06-27 20:27:57,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:27:58,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:27:58,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 146 transitions. [2024-06-27 20:27:58,000 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43452380952380953 [2024-06-27 20:27:58,000 INFO L175 Difference]: Start difference. First operand has 225 places, 286 transitions, 3003 flow. Second operand 8 states and 146 transitions. [2024-06-27 20:27:58,000 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 232 places, 305 transitions, 3665 flow [2024-06-27 20:27:58,567 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 226 places, 305 transitions, 3435 flow, removed 65 selfloop flow, removed 6 redundant places. [2024-06-27 20:27:58,570 INFO L231 Difference]: Finished difference. Result has 227 places, 286 transitions, 2831 flow [2024-06-27 20:27:58,570 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2773, PETRI_DIFFERENCE_MINUEND_PLACES=219, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=286, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=260, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2831, PETRI_PLACES=227, PETRI_TRANSITIONS=286} [2024-06-27 20:27:58,572 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 184 predicate places. [2024-06-27 20:27:58,572 INFO L495 AbstractCegarLoop]: Abstraction has has 227 places, 286 transitions, 2831 flow [2024-06-27 20:27:58,572 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:27:58,572 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:27:58,572 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:27:58,572 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2024-06-27 20:27:58,573 INFO L420 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:27:58,573 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:27:58,573 INFO L85 PathProgramCache]: Analyzing trace with hash 1877810006, now seen corresponding path program 5 times [2024-06-27 20:27:58,573 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:27:58,573 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [23881559] [2024-06-27 20:27:58,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:27:58,573 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:27:58,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:27:59,166 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:27:59,167 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:27:59,167 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [23881559] [2024-06-27 20:27:59,167 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [23881559] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:27:59,167 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:27:59,167 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:27:59,167 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2029718763] [2024-06-27 20:27:59,167 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:27:59,167 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:27:59,168 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:27:59,168 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:27:59,168 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:27:59,245 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-27 20:27:59,245 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 227 places, 286 transitions, 2831 flow. Second operand has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:27:59,245 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:27:59,245 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-27 20:27:59,246 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:28:00,037 INFO L124 PetriNetUnfolderBase]: 2510/3974 cut-off events. [2024-06-27 20:28:00,038 INFO L125 PetriNetUnfolderBase]: For 465541/465543 co-relation queries the response was YES. [2024-06-27 20:28:00,063 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37142 conditions, 3974 events. 2510/3974 cut-off events. For 465541/465543 co-relation queries the response was YES. Maximal size of possible extension queue 240. Compared 22418 event pairs, 634 based on Foata normal form. 2/3969 useless extension candidates. Maximal degree in co-relation 37037. Up to 3610 conditions per place. [2024-06-27 20:28:00,079 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 260 selfloop transitions, 45 changer transitions 0/310 dead transitions. [2024-06-27 20:28:00,080 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 234 places, 310 transitions, 3773 flow [2024-06-27 20:28:00,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:28:00,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:28:00,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 149 transitions. [2024-06-27 20:28:00,081 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44345238095238093 [2024-06-27 20:28:00,081 INFO L175 Difference]: Start difference. First operand has 227 places, 286 transitions, 2831 flow. Second operand 8 states and 149 transitions. [2024-06-27 20:28:00,081 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 234 places, 310 transitions, 3773 flow [2024-06-27 20:28:00,652 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 224 places, 310 transitions, 3570 flow, removed 11 selfloop flow, removed 10 redundant places. [2024-06-27 20:28:00,655 INFO L231 Difference]: Finished difference. Result has 226 places, 292 transitions, 2870 flow [2024-06-27 20:28:00,656 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2628, PETRI_DIFFERENCE_MINUEND_PLACES=217, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=286, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=241, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2870, PETRI_PLACES=226, PETRI_TRANSITIONS=292} [2024-06-27 20:28:00,656 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 183 predicate places. [2024-06-27 20:28:00,656 INFO L495 AbstractCegarLoop]: Abstraction has has 226 places, 292 transitions, 2870 flow [2024-06-27 20:28:00,656 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:28:00,656 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:28:00,656 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:28:00,657 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2024-06-27 20:28:00,657 INFO L420 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:28:00,657 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:28:00,657 INFO L85 PathProgramCache]: Analyzing trace with hash 1878225716, now seen corresponding path program 6 times [2024-06-27 20:28:00,657 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:28:00,657 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1207108232] [2024-06-27 20:28:00,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:28:00,657 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:28:00,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:28:01,242 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:28:01,246 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:28:01,246 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1207108232] [2024-06-27 20:28:01,247 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1207108232] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:28:01,247 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:28:01,247 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:28:01,247 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [147766123] [2024-06-27 20:28:01,247 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:28:01,247 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:28:01,247 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:28:01,248 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:28:01,248 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:28:01,303 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-27 20:28:01,304 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 226 places, 292 transitions, 2870 flow. Second operand has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:28:01,304 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:28:01,304 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-27 20:28:01,304 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:28:02,073 INFO L124 PetriNetUnfolderBase]: 2504/3968 cut-off events. [2024-06-27 20:28:02,073 INFO L125 PetriNetUnfolderBase]: For 471666/471668 co-relation queries the response was YES. [2024-06-27 20:28:02,102 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37099 conditions, 3968 events. 2504/3968 cut-off events. For 471666/471668 co-relation queries the response was YES. Maximal size of possible extension queue 241. Compared 22407 event pairs, 629 based on Foata normal form. 2/3963 useless extension candidates. Maximal degree in co-relation 36992. Up to 3605 conditions per place. [2024-06-27 20:28:02,120 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 257 selfloop transitions, 47 changer transitions 0/309 dead transitions. [2024-06-27 20:28:02,120 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 233 places, 309 transitions, 3542 flow [2024-06-27 20:28:02,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:28:02,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:28:02,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 148 transitions. [2024-06-27 20:28:02,121 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44047619047619047 [2024-06-27 20:28:02,121 INFO L175 Difference]: Start difference. First operand has 226 places, 292 transitions, 2870 flow. Second operand 8 states and 148 transitions. [2024-06-27 20:28:02,121 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 233 places, 309 transitions, 3542 flow [2024-06-27 20:28:02,816 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 228 places, 309 transitions, 3376 flow, removed 44 selfloop flow, removed 5 redundant places. [2024-06-27 20:28:02,819 INFO L231 Difference]: Finished difference. Result has 229 places, 292 transitions, 2804 flow [2024-06-27 20:28:02,820 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2704, PETRI_DIFFERENCE_MINUEND_PLACES=221, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=292, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=245, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2804, PETRI_PLACES=229, PETRI_TRANSITIONS=292} [2024-06-27 20:28:02,820 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 186 predicate places. [2024-06-27 20:28:02,820 INFO L495 AbstractCegarLoop]: Abstraction has has 229 places, 292 transitions, 2804 flow [2024-06-27 20:28:02,820 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:28:02,820 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:28:02,820 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:28:02,821 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2024-06-27 20:28:02,821 INFO L420 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:28:02,821 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:28:02,821 INFO L85 PathProgramCache]: Analyzing trace with hash 819895480, now seen corresponding path program 7 times [2024-06-27 20:28:02,821 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:28:02,821 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [14698749] [2024-06-27 20:28:02,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:28:02,821 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:28:02,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:28:03,486 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:28:03,486 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:28:03,486 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [14698749] [2024-06-27 20:28:03,486 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [14698749] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:28:03,486 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:28:03,487 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:28:03,487 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [328129928] [2024-06-27 20:28:03,487 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:28:03,487 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:28:03,487 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:28:03,487 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:28:03,487 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:28:03,546 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-27 20:28:03,546 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 229 places, 292 transitions, 2804 flow. Second operand has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:28:03,547 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:28:03,547 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-27 20:28:03,547 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:28:04,231 INFO L124 PetriNetUnfolderBase]: 2508/3994 cut-off events. [2024-06-27 20:28:04,232 INFO L125 PetriNetUnfolderBase]: For 483647/483652 co-relation queries the response was YES. [2024-06-27 20:28:04,261 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37113 conditions, 3994 events. 2508/3994 cut-off events. For 483647/483652 co-relation queries the response was YES. Maximal size of possible extension queue 245. Compared 22778 event pairs, 613 based on Foata normal form. 6/3992 useless extension candidates. Maximal degree in co-relation 37005. Up to 3302 conditions per place. [2024-06-27 20:28:04,279 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 204 selfloop transitions, 103 changer transitions 0/312 dead transitions. [2024-06-27 20:28:04,279 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 236 places, 312 transitions, 3845 flow [2024-06-27 20:28:04,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:28:04,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:28:04,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 151 transitions. [2024-06-27 20:28:04,281 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4494047619047619 [2024-06-27 20:28:04,281 INFO L175 Difference]: Start difference. First operand has 229 places, 292 transitions, 2804 flow. Second operand 8 states and 151 transitions. [2024-06-27 20:28:04,281 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 236 places, 312 transitions, 3845 flow [2024-06-27 20:28:04,932 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 229 places, 312 transitions, 3747 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-06-27 20:28:04,935 INFO L231 Difference]: Finished difference. Result has 230 places, 295 transitions, 2991 flow [2024-06-27 20:28:04,936 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2706, PETRI_DIFFERENCE_MINUEND_PLACES=222, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=292, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=100, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=191, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2991, PETRI_PLACES=230, PETRI_TRANSITIONS=295} [2024-06-27 20:28:04,936 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 187 predicate places. [2024-06-27 20:28:04,936 INFO L495 AbstractCegarLoop]: Abstraction has has 230 places, 295 transitions, 2991 flow [2024-06-27 20:28:04,936 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:28:04,937 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:28:04,937 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:28:04,937 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2024-06-27 20:28:04,937 INFO L420 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:28:04,937 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:28:04,937 INFO L85 PathProgramCache]: Analyzing trace with hash 825609400, now seen corresponding path program 8 times [2024-06-27 20:28:04,937 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:28:04,937 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [777717482] [2024-06-27 20:28:04,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:28:04,938 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:28:04,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:28:05,547 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:28:05,548 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:28:05,548 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [777717482] [2024-06-27 20:28:05,548 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [777717482] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:28:05,548 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:28:05,548 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:28:05,548 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [387646794] [2024-06-27 20:28:05,548 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:28:05,549 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:28:05,549 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:28:05,549 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:28:05,549 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:28:05,614 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-27 20:28:05,614 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 230 places, 295 transitions, 2991 flow. Second operand has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:28:05,614 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:28:05,615 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-27 20:28:05,615 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:28:06,343 INFO L124 PetriNetUnfolderBase]: 2550/4056 cut-off events. [2024-06-27 20:28:06,343 INFO L125 PetriNetUnfolderBase]: For 501959/501964 co-relation queries the response was YES. [2024-06-27 20:28:06,375 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38394 conditions, 4056 events. 2550/4056 cut-off events. For 501959/501964 co-relation queries the response was YES. Maximal size of possible extension queue 250. Compared 23142 event pairs, 616 based on Foata normal form. 4/4052 useless extension candidates. Maximal degree in co-relation 38285. Up to 3332 conditions per place. [2024-06-27 20:28:06,392 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 198 selfloop transitions, 116 changer transitions 0/319 dead transitions. [2024-06-27 20:28:06,393 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 237 places, 319 transitions, 4141 flow [2024-06-27 20:28:06,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:28:06,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:28:06,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 150 transitions. [2024-06-27 20:28:06,394 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44642857142857145 [2024-06-27 20:28:06,394 INFO L175 Difference]: Start difference. First operand has 230 places, 295 transitions, 2991 flow. Second operand 8 states and 150 transitions. [2024-06-27 20:28:06,394 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 237 places, 319 transitions, 4141 flow [2024-06-27 20:28:07,084 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 232 places, 319 transitions, 3894 flow, removed 27 selfloop flow, removed 5 redundant places. [2024-06-27 20:28:07,088 INFO L231 Difference]: Finished difference. Result has 234 places, 302 transitions, 3171 flow [2024-06-27 20:28:07,088 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2752, PETRI_DIFFERENCE_MINUEND_PLACES=225, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=295, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=109, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=184, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3171, PETRI_PLACES=234, PETRI_TRANSITIONS=302} [2024-06-27 20:28:07,089 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 191 predicate places. [2024-06-27 20:28:07,089 INFO L495 AbstractCegarLoop]: Abstraction has has 234 places, 302 transitions, 3171 flow [2024-06-27 20:28:07,089 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:28:07,089 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:28:07,089 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:28:07,089 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2024-06-27 20:28:07,089 INFO L420 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:28:07,090 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:28:07,090 INFO L85 PathProgramCache]: Analyzing trace with hash 302508886, now seen corresponding path program 9 times [2024-06-27 20:28:07,090 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:28:07,090 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1644249937] [2024-06-27 20:28:07,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:28:07,090 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:28:07,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:28:07,705 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:28:07,705 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:28:07,705 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1644249937] [2024-06-27 20:28:07,705 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1644249937] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:28:07,705 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:28:07,705 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:28:07,705 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [129480281] [2024-06-27 20:28:07,706 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:28:07,706 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:28:07,706 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:28:07,706 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:28:07,706 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:28:07,753 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-27 20:28:07,754 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 234 places, 302 transitions, 3171 flow. Second operand has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:28:07,754 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:28:07,754 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-27 20:28:07,754 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:28:08,514 INFO L124 PetriNetUnfolderBase]: 2560/4074 cut-off events. [2024-06-27 20:28:08,514 INFO L125 PetriNetUnfolderBase]: For 514221/514226 co-relation queries the response was YES. [2024-06-27 20:28:08,546 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38732 conditions, 4074 events. 2560/4074 cut-off events. For 514221/514226 co-relation queries the response was YES. Maximal size of possible extension queue 254. Compared 23285 event pairs, 650 based on Foata normal form. 4/4070 useless extension candidates. Maximal degree in co-relation 38621. Up to 3338 conditions per place. [2024-06-27 20:28:08,564 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 197 selfloop transitions, 120 changer transitions 0/322 dead transitions. [2024-06-27 20:28:08,564 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 241 places, 322 transitions, 4246 flow [2024-06-27 20:28:08,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:28:08,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:28:08,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 150 transitions. [2024-06-27 20:28:08,565 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44642857142857145 [2024-06-27 20:28:08,565 INFO L175 Difference]: Start difference. First operand has 234 places, 302 transitions, 3171 flow. Second operand 8 states and 150 transitions. [2024-06-27 20:28:08,565 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 241 places, 322 transitions, 4246 flow [2024-06-27 20:28:09,223 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 237 places, 322 transitions, 4054 flow, removed 29 selfloop flow, removed 4 redundant places. [2024-06-27 20:28:09,227 INFO L231 Difference]: Finished difference. Result has 238 places, 305 transitions, 3300 flow [2024-06-27 20:28:09,227 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2981, PETRI_DIFFERENCE_MINUEND_PLACES=230, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=302, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=117, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=185, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3300, PETRI_PLACES=238, PETRI_TRANSITIONS=305} [2024-06-27 20:28:09,228 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 195 predicate places. [2024-06-27 20:28:09,228 INFO L495 AbstractCegarLoop]: Abstraction has has 238 places, 305 transitions, 3300 flow [2024-06-27 20:28:09,228 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:28:09,228 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:28:09,228 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:28:09,228 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2024-06-27 20:28:09,228 INFO L420 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:28:09,229 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:28:09,229 INFO L85 PathProgramCache]: Analyzing trace with hash -965437368, now seen corresponding path program 10 times [2024-06-27 20:28:09,229 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:28:09,229 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1532852329] [2024-06-27 20:28:09,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:28:09,229 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:28:09,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:28:09,829 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:28:09,829 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:28:09,829 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1532852329] [2024-06-27 20:28:09,829 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1532852329] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:28:09,830 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:28:09,830 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:28:09,830 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1235393630] [2024-06-27 20:28:09,830 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:28:09,830 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:28:09,830 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:28:09,830 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:28:09,831 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:28:09,882 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-27 20:28:09,883 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 238 places, 305 transitions, 3300 flow. Second operand has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:28:09,883 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:28:09,883 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-27 20:28:09,883 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:28:10,601 INFO L124 PetriNetUnfolderBase]: 2550/4054 cut-off events. [2024-06-27 20:28:10,601 INFO L125 PetriNetUnfolderBase]: For 521870/521875 co-relation queries the response was YES. [2024-06-27 20:28:10,634 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38626 conditions, 4054 events. 2550/4054 cut-off events. For 521870/521875 co-relation queries the response was YES. Maximal size of possible extension queue 253. Compared 23161 event pairs, 641 based on Foata normal form. 4/4050 useless extension candidates. Maximal degree in co-relation 38514. Up to 3330 conditions per place. [2024-06-27 20:28:10,651 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 196 selfloop transitions, 121 changer transitions 0/322 dead transitions. [2024-06-27 20:28:10,651 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 245 places, 322 transitions, 4304 flow [2024-06-27 20:28:10,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:28:10,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:28:10,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 151 transitions. [2024-06-27 20:28:10,652 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4494047619047619 [2024-06-27 20:28:10,653 INFO L175 Difference]: Start difference. First operand has 238 places, 305 transitions, 3300 flow. Second operand 8 states and 151 transitions. [2024-06-27 20:28:10,653 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 245 places, 322 transitions, 4304 flow [2024-06-27 20:28:11,442 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 240 places, 322 transitions, 4012 flow, removed 55 selfloop flow, removed 5 redundant places. [2024-06-27 20:28:11,445 INFO L231 Difference]: Finished difference. Result has 241 places, 305 transitions, 3256 flow [2024-06-27 20:28:11,446 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3008, PETRI_DIFFERENCE_MINUEND_PLACES=233, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=305, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=121, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=184, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3256, PETRI_PLACES=241, PETRI_TRANSITIONS=305} [2024-06-27 20:28:11,446 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 198 predicate places. [2024-06-27 20:28:11,446 INFO L495 AbstractCegarLoop]: Abstraction has has 241 places, 305 transitions, 3256 flow [2024-06-27 20:28:11,446 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:28:11,446 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:28:11,447 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:28:11,447 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2024-06-27 20:28:11,447 INFO L420 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:28:11,447 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:28:11,447 INFO L85 PathProgramCache]: Analyzing trace with hash 420161020, now seen corresponding path program 11 times [2024-06-27 20:28:11,447 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:28:11,447 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1814781644] [2024-06-27 20:28:11,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:28:11,448 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:28:11,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:28:12,048 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:28:12,048 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:28:12,049 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1814781644] [2024-06-27 20:28:12,049 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1814781644] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:28:12,049 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:28:12,049 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:28:12,049 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1906273508] [2024-06-27 20:28:12,049 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:28:12,049 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:28:12,049 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:28:12,050 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:28:12,050 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:28:12,110 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-27 20:28:12,110 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 241 places, 305 transitions, 3256 flow. Second operand has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:28:12,110 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:28:12,111 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-27 20:28:12,111 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:28:12,762 INFO L124 PetriNetUnfolderBase]: 2538/4036 cut-off events. [2024-06-27 20:28:12,763 INFO L125 PetriNetUnfolderBase]: For 527318/527323 co-relation queries the response was YES. [2024-06-27 20:28:12,793 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38202 conditions, 4036 events. 2538/4036 cut-off events. For 527318/527323 co-relation queries the response was YES. Maximal size of possible extension queue 252. Compared 23046 event pairs, 629 based on Foata normal form. 6/4034 useless extension candidates. Maximal degree in co-relation 38090. Up to 3322 conditions per place. [2024-06-27 20:28:12,809 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 208 selfloop transitions, 108 changer transitions 0/321 dead transitions. [2024-06-27 20:28:12,809 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 248 places, 321 transitions, 4108 flow [2024-06-27 20:28:12,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:28:12,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:28:12,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 151 transitions. [2024-06-27 20:28:12,810 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4494047619047619 [2024-06-27 20:28:12,810 INFO L175 Difference]: Start difference. First operand has 241 places, 305 transitions, 3256 flow. Second operand 8 states and 151 transitions. [2024-06-27 20:28:12,810 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 248 places, 321 transitions, 4108 flow [2024-06-27 20:28:13,555 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 238 places, 321 transitions, 3689 flow, removed 26 selfloop flow, removed 10 redundant places. [2024-06-27 20:28:13,558 INFO L231 Difference]: Finished difference. Result has 239 places, 305 transitions, 3060 flow [2024-06-27 20:28:13,558 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2837, PETRI_DIFFERENCE_MINUEND_PLACES=231, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=305, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=108, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=197, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3060, PETRI_PLACES=239, PETRI_TRANSITIONS=305} [2024-06-27 20:28:13,562 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 196 predicate places. [2024-06-27 20:28:13,562 INFO L495 AbstractCegarLoop]: Abstraction has has 239 places, 305 transitions, 3060 flow [2024-06-27 20:28:13,562 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:28:13,562 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:28:13,562 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:28:13,562 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2024-06-27 20:28:13,562 INFO L420 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:28:13,563 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:28:13,563 INFO L85 PathProgramCache]: Analyzing trace with hash 420398170, now seen corresponding path program 12 times [2024-06-27 20:28:13,563 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:28:13,563 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2086155315] [2024-06-27 20:28:13,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:28:13,563 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:28:13,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:28:14,179 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:28:14,179 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:28:14,179 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2086155315] [2024-06-27 20:28:14,179 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2086155315] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:28:14,179 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:28:14,179 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:28:14,180 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [680189826] [2024-06-27 20:28:14,180 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:28:14,180 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:28:14,180 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:28:14,180 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:28:14,180 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:28:14,228 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-27 20:28:14,228 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 239 places, 305 transitions, 3060 flow. Second operand has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:28:14,228 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:28:14,229 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-27 20:28:14,229 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:28:14,937 INFO L124 PetriNetUnfolderBase]: 2522/4010 cut-off events. [2024-06-27 20:28:14,937 INFO L125 PetriNetUnfolderBase]: For 526651/526656 co-relation queries the response was YES. [2024-06-27 20:28:14,969 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37563 conditions, 4010 events. 2522/4010 cut-off events. For 526651/526656 co-relation queries the response was YES. Maximal size of possible extension queue 251. Compared 22835 event pairs, 627 based on Foata normal form. 6/4008 useless extension candidates. Maximal degree in co-relation 37451. Up to 3309 conditions per place. [2024-06-27 20:28:14,987 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 210 selfloop transitions, 105 changer transitions 0/320 dead transitions. [2024-06-27 20:28:14,988 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 246 places, 320 transitions, 3756 flow [2024-06-27 20:28:14,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:28:14,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:28:14,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 150 transitions. [2024-06-27 20:28:14,989 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44642857142857145 [2024-06-27 20:28:14,989 INFO L175 Difference]: Start difference. First operand has 239 places, 305 transitions, 3060 flow. Second operand 8 states and 150 transitions. [2024-06-27 20:28:14,989 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 246 places, 320 transitions, 3756 flow [2024-06-27 20:28:15,627 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 238 places, 320 transitions, 3398 flow, removed 24 selfloop flow, removed 8 redundant places. [2024-06-27 20:28:15,630 INFO L231 Difference]: Finished difference. Result has 239 places, 305 transitions, 2921 flow [2024-06-27 20:28:15,630 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2702, PETRI_DIFFERENCE_MINUEND_PLACES=231, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=305, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=105, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=200, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2921, PETRI_PLACES=239, PETRI_TRANSITIONS=305} [2024-06-27 20:28:15,631 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 196 predicate places. [2024-06-27 20:28:15,631 INFO L495 AbstractCegarLoop]: Abstraction has has 239 places, 305 transitions, 2921 flow [2024-06-27 20:28:15,631 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:28:15,631 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:28:15,631 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:28:15,631 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2024-06-27 20:28:15,631 INFO L420 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:28:15,632 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:28:15,632 INFO L85 PathProgramCache]: Analyzing trace with hash 420037702, now seen corresponding path program 4 times [2024-06-27 20:28:15,632 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:28:15,632 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1824311033] [2024-06-27 20:28:15,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:28:15,632 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:28:15,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:28:16,293 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:28:16,294 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:28:16,296 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1824311033] [2024-06-27 20:28:16,296 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1824311033] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:28:16,296 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:28:16,296 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:28:16,296 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [527413354] [2024-06-27 20:28:16,296 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:28:16,297 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:28:16,297 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:28:16,297 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:28:16,297 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:28:16,392 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-27 20:28:16,392 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 239 places, 305 transitions, 2921 flow. Second operand has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 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) [2024-06-27 20:28:16,392 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:28:16,393 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-27 20:28:16,393 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:28:17,217 INFO L124 PetriNetUnfolderBase]: 2451/3965 cut-off events. [2024-06-27 20:28:17,217 INFO L125 PetriNetUnfolderBase]: For 567002/567009 co-relation queries the response was YES. [2024-06-27 20:28:17,246 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37504 conditions, 3965 events. 2451/3965 cut-off events. For 567002/567009 co-relation queries the response was YES. Maximal size of possible extension queue 254. Compared 23258 event pairs, 598 based on Foata normal form. 16/3933 useless extension candidates. Maximal degree in co-relation 37391. Up to 3326 conditions per place. [2024-06-27 20:28:17,262 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 239 selfloop transitions, 55 changer transitions 0/326 dead transitions. [2024-06-27 20:28:17,262 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 246 places, 326 transitions, 3723 flow [2024-06-27 20:28:17,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:28:17,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:28:17,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 156 transitions. [2024-06-27 20:28:17,263 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4642857142857143 [2024-06-27 20:28:17,263 INFO L175 Difference]: Start difference. First operand has 239 places, 305 transitions, 2921 flow. Second operand 8 states and 156 transitions. [2024-06-27 20:28:17,263 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 246 places, 326 transitions, 3723 flow [2024-06-27 20:28:17,960 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 237 places, 326 transitions, 3451 flow, removed 0 selfloop flow, removed 9 redundant places. [2024-06-27 20:28:17,963 INFO L231 Difference]: Finished difference. Result has 238 places, 307 transitions, 2855 flow [2024-06-27 20:28:17,963 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2649, PETRI_DIFFERENCE_MINUEND_PLACES=230, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=305, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=250, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2855, PETRI_PLACES=238, PETRI_TRANSITIONS=307} [2024-06-27 20:28:17,964 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 195 predicate places. [2024-06-27 20:28:17,964 INFO L495 AbstractCegarLoop]: Abstraction has has 238 places, 307 transitions, 2855 flow [2024-06-27 20:28:17,964 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 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) [2024-06-27 20:28:17,964 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:28:17,964 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:28:17,964 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2024-06-27 20:28:17,964 INFO L420 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:28:17,965 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:28:17,965 INFO L85 PathProgramCache]: Analyzing trace with hash 819904408, now seen corresponding path program 2 times [2024-06-27 20:28:17,965 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:28:17,965 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1720864792] [2024-06-27 20:28:17,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:28:17,965 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:28:17,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:28:18,627 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:28:18,627 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:28:18,627 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1720864792] [2024-06-27 20:28:18,627 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1720864792] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:28:18,627 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:28:18,627 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:28:18,627 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2094568817] [2024-06-27 20:28:18,628 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:28:18,628 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:28:18,628 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:28:18,628 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:28:18,628 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:28:18,695 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-27 20:28:18,696 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 238 places, 307 transitions, 2855 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:28:18,696 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:28:18,696 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-27 20:28:18,696 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:28:19,325 INFO L124 PetriNetUnfolderBase]: 2566/4055 cut-off events. [2024-06-27 20:28:19,326 INFO L125 PetriNetUnfolderBase]: For 541632/541640 co-relation queries the response was YES. [2024-06-27 20:28:19,356 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38255 conditions, 4055 events. 2566/4055 cut-off events. For 541632/541640 co-relation queries the response was YES. Maximal size of possible extension queue 251. Compared 22849 event pairs, 653 based on Foata normal form. 7/4059 useless extension candidates. Maximal degree in co-relation 38141. Up to 3788 conditions per place. [2024-06-27 20:28:19,371 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 275 selfloop transitions, 50 changer transitions 0/330 dead transitions. [2024-06-27 20:28:19,372 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 246 places, 330 transitions, 4177 flow [2024-06-27 20:28:19,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:28:19,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:28:19,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 156 transitions. [2024-06-27 20:28:19,373 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4126984126984127 [2024-06-27 20:28:19,373 INFO L175 Difference]: Start difference. First operand has 238 places, 307 transitions, 2855 flow. Second operand 9 states and 156 transitions. [2024-06-27 20:28:19,373 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 246 places, 330 transitions, 4177 flow [2024-06-27 20:28:20,011 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 240 places, 330 transitions, 4015 flow, removed 28 selfloop flow, removed 6 redundant places. [2024-06-27 20:28:20,015 INFO L231 Difference]: Finished difference. Result has 241 places, 316 transitions, 3129 flow [2024-06-27 20:28:20,015 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2693, PETRI_DIFFERENCE_MINUEND_PLACES=232, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=307, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=263, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3129, PETRI_PLACES=241, PETRI_TRANSITIONS=316} [2024-06-27 20:28:20,016 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 198 predicate places. [2024-06-27 20:28:20,016 INFO L495 AbstractCegarLoop]: Abstraction has has 241 places, 316 transitions, 3129 flow [2024-06-27 20:28:20,016 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:28:20,016 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:28:20,016 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:28:20,016 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2024-06-27 20:28:20,016 INFO L420 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:28:20,016 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:28:20,017 INFO L85 PathProgramCache]: Analyzing trace with hash 819903974, now seen corresponding path program 5 times [2024-06-27 20:28:20,017 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:28:20,017 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [560768894] [2024-06-27 20:28:20,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:28:20,017 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:28:20,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:28:20,720 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:28:20,720 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:28:20,720 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [560768894] [2024-06-27 20:28:20,720 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [560768894] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:28:20,720 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:28:20,721 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:28:20,721 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [288198063] [2024-06-27 20:28:20,721 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:28:20,721 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:28:20,721 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:28:20,721 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:28:20,721 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:28:20,798 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-27 20:28:20,798 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 241 places, 316 transitions, 3129 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:28:20,798 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:28:20,798 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-27 20:28:20,799 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:28:21,544 INFO L124 PetriNetUnfolderBase]: 2681/4248 cut-off events. [2024-06-27 20:28:21,544 INFO L125 PetriNetUnfolderBase]: For 602186/602191 co-relation queries the response was YES. [2024-06-27 20:28:21,577 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41004 conditions, 4248 events. 2681/4248 cut-off events. For 602186/602191 co-relation queries the response was YES. Maximal size of possible extension queue 263. Compared 24294 event pairs, 607 based on Foata normal form. 5/4245 useless extension candidates. Maximal degree in co-relation 40889. Up to 3218 conditions per place. [2024-06-27 20:28:21,594 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 226 selfloop transitions, 132 changer transitions 0/363 dead transitions. [2024-06-27 20:28:21,594 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 249 places, 363 transitions, 5085 flow [2024-06-27 20:28:21,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:28:21,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:28:21,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 171 transitions. [2024-06-27 20:28:21,595 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4523809523809524 [2024-06-27 20:28:21,596 INFO L175 Difference]: Start difference. First operand has 241 places, 316 transitions, 3129 flow. Second operand 9 states and 171 transitions. [2024-06-27 20:28:21,596 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 249 places, 363 transitions, 5085 flow [2024-06-27 20:28:22,477 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 245 places, 363 transitions, 4949 flow, removed 57 selfloop flow, removed 4 redundant places. [2024-06-27 20:28:22,481 INFO L231 Difference]: Finished difference. Result has 248 places, 338 transitions, 3792 flow [2024-06-27 20:28:22,481 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2993, PETRI_DIFFERENCE_MINUEND_PLACES=237, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=316, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=113, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=193, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3792, PETRI_PLACES=248, PETRI_TRANSITIONS=338} [2024-06-27 20:28:22,481 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 205 predicate places. [2024-06-27 20:28:22,482 INFO L495 AbstractCegarLoop]: Abstraction has has 248 places, 338 transitions, 3792 flow [2024-06-27 20:28:22,482 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:28:22,482 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:28:22,482 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:28:22,482 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2024-06-27 20:28:22,482 INFO L420 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:28:22,482 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:28:22,482 INFO L85 PathProgramCache]: Analyzing trace with hash 525108230, now seen corresponding path program 6 times [2024-06-27 20:28:22,483 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:28:22,483 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1842465641] [2024-06-27 20:28:22,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:28:22,483 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:28:22,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:28:23,161 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:28:23,161 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:28:23,161 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1842465641] [2024-06-27 20:28:23,161 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1842465641] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:28:23,161 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:28:23,161 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:28:23,161 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [192880619] [2024-06-27 20:28:23,162 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:28:23,162 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:28:23,162 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:28:23,162 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:28:23,162 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:28:23,226 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-27 20:28:23,227 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 248 places, 338 transitions, 3792 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:28:23,227 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:28:23,227 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-27 20:28:23,227 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:28:23,980 INFO L124 PetriNetUnfolderBase]: 2704/4285 cut-off events. [2024-06-27 20:28:23,980 INFO L125 PetriNetUnfolderBase]: For 626096/626101 co-relation queries the response was YES. [2024-06-27 20:28:24,114 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42920 conditions, 4285 events. 2704/4285 cut-off events. For 626096/626101 co-relation queries the response was YES. Maximal size of possible extension queue 263. Compared 24545 event pairs, 606 based on Foata normal form. 5/4282 useless extension candidates. Maximal degree in co-relation 42801. Up to 3241 conditions per place. [2024-06-27 20:28:24,130 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 221 selfloop transitions, 143 changer transitions 0/369 dead transitions. [2024-06-27 20:28:24,130 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 256 places, 369 transitions, 5513 flow [2024-06-27 20:28:24,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:28:24,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:28:24,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 171 transitions. [2024-06-27 20:28:24,131 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4523809523809524 [2024-06-27 20:28:24,131 INFO L175 Difference]: Start difference. First operand has 248 places, 338 transitions, 3792 flow. Second operand 9 states and 171 transitions. [2024-06-27 20:28:24,132 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 256 places, 369 transitions, 5513 flow [2024-06-27 20:28:24,887 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 253 places, 369 transitions, 5249 flow, removed 106 selfloop flow, removed 3 redundant places. [2024-06-27 20:28:24,891 INFO L231 Difference]: Finished difference. Result has 256 places, 347 transitions, 4200 flow [2024-06-27 20:28:24,891 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3564, PETRI_DIFFERENCE_MINUEND_PLACES=245, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=338, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=134, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=202, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4200, PETRI_PLACES=256, PETRI_TRANSITIONS=347} [2024-06-27 20:28:24,892 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 213 predicate places. [2024-06-27 20:28:24,892 INFO L495 AbstractCegarLoop]: Abstraction has has 256 places, 347 transitions, 4200 flow [2024-06-27 20:28:24,892 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:28:24,892 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:28:24,892 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:28:24,892 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2024-06-27 20:28:24,892 INFO L420 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:28:24,893 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:28:24,893 INFO L85 PathProgramCache]: Analyzing trace with hash 834189208, now seen corresponding path program 3 times [2024-06-27 20:28:24,893 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:28:24,893 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1799665972] [2024-06-27 20:28:24,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:28:24,894 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:28:24,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:28:25,576 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:28:25,576 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:28:25,576 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1799665972] [2024-06-27 20:28:25,576 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1799665972] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:28:25,576 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:28:25,576 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:28:25,577 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2025397086] [2024-06-27 20:28:25,577 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:28:25,577 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:28:25,577 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:28:25,577 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:28:25,577 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:28:25,653 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-27 20:28:25,653 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 256 places, 347 transitions, 4200 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:28:25,654 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:28:25,654 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-27 20:28:25,654 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:28:26,515 INFO L124 PetriNetUnfolderBase]: 2709/4267 cut-off events. [2024-06-27 20:28:26,515 INFO L125 PetriNetUnfolderBase]: For 633074/633074 co-relation queries the response was YES. [2024-06-27 20:28:26,553 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43346 conditions, 4267 events. 2709/4267 cut-off events. For 633074/633074 co-relation queries the response was YES. Maximal size of possible extension queue 263. Compared 24139 event pairs, 671 based on Foata normal form. 1/4266 useless extension candidates. Maximal degree in co-relation 43223. Up to 4041 conditions per place. [2024-06-27 20:28:26,570 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 337 selfloop transitions, 20 changer transitions 0/362 dead transitions. [2024-06-27 20:28:26,571 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 264 places, 362 transitions, 5046 flow [2024-06-27 20:28:26,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:28:26,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:28:26,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 147 transitions. [2024-06-27 20:28:26,572 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3888888888888889 [2024-06-27 20:28:26,572 INFO L175 Difference]: Start difference. First operand has 256 places, 347 transitions, 4200 flow. Second operand 9 states and 147 transitions. [2024-06-27 20:28:26,572 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 264 places, 362 transitions, 5046 flow [2024-06-27 20:28:27,417 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 259 places, 362 transitions, 4703 flow, removed 59 selfloop flow, removed 5 redundant places. [2024-06-27 20:28:27,422 INFO L231 Difference]: Finished difference. Result has 260 places, 350 transitions, 4013 flow [2024-06-27 20:28:27,422 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3857, PETRI_DIFFERENCE_MINUEND_PLACES=251, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=347, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=327, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4013, PETRI_PLACES=260, PETRI_TRANSITIONS=350} [2024-06-27 20:28:27,423 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 217 predicate places. [2024-06-27 20:28:27,423 INFO L495 AbstractCegarLoop]: Abstraction has has 260 places, 350 transitions, 4013 flow [2024-06-27 20:28:27,423 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:28:27,423 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:28:27,423 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:28:27,423 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2024-06-27 20:28:27,424 INFO L420 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:28:27,424 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:28:27,424 INFO L85 PathProgramCache]: Analyzing trace with hash 538930324, now seen corresponding path program 4 times [2024-06-27 20:28:27,424 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:28:27,424 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1865497654] [2024-06-27 20:28:27,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:28:27,425 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:28:27,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:28:28,115 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:28:28,115 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:28:28,115 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1865497654] [2024-06-27 20:28:28,115 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1865497654] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:28:28,115 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:28:28,116 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:28:28,116 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2039603605] [2024-06-27 20:28:28,116 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:28:28,116 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:28:28,116 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:28:28,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:28:28,116 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:28:28,180 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-27 20:28:28,181 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 260 places, 350 transitions, 4013 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:28:28,181 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:28:28,181 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-27 20:28:28,181 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:28:28,957 INFO L124 PetriNetUnfolderBase]: 2706/4265 cut-off events. [2024-06-27 20:28:28,957 INFO L125 PetriNetUnfolderBase]: For 640664/640672 co-relation queries the response was YES. [2024-06-27 20:28:28,993 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42713 conditions, 4265 events. 2706/4265 cut-off events. For 640664/640672 co-relation queries the response was YES. Maximal size of possible extension queue 263. Compared 24142 event pairs, 678 based on Foata normal form. 7/4269 useless extension candidates. Maximal degree in co-relation 42589. Up to 3982 conditions per place. [2024-06-27 20:28:29,011 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 303 selfloop transitions, 55 changer transitions 0/363 dead transitions. [2024-06-27 20:28:29,011 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 268 places, 363 transitions, 4925 flow [2024-06-27 20:28:29,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:28:29,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:28:29,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 154 transitions. [2024-06-27 20:28:29,012 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4074074074074074 [2024-06-27 20:28:29,012 INFO L175 Difference]: Start difference. First operand has 260 places, 350 transitions, 4013 flow. Second operand 9 states and 154 transitions. [2024-06-27 20:28:29,012 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 268 places, 363 transitions, 4925 flow [2024-06-27 20:28:29,988 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 261 places, 363 transitions, 4711 flow, removed 89 selfloop flow, removed 7 redundant places. [2024-06-27 20:28:29,992 INFO L231 Difference]: Finished difference. Result has 262 places, 350 transitions, 3915 flow [2024-06-27 20:28:29,992 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3799, PETRI_DIFFERENCE_MINUEND_PLACES=253, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=350, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=295, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3915, PETRI_PLACES=262, PETRI_TRANSITIONS=350} [2024-06-27 20:28:29,992 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 219 predicate places. [2024-06-27 20:28:29,992 INFO L495 AbstractCegarLoop]: Abstraction has has 262 places, 350 transitions, 3915 flow [2024-06-27 20:28:29,992 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:28:29,993 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:28:29,993 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:28:29,993 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2024-06-27 20:28:29,993 INFO L420 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:28:29,993 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:28:29,993 INFO L85 PathProgramCache]: Analyzing trace with hash 538929890, now seen corresponding path program 7 times [2024-06-27 20:28:29,993 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:28:29,993 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1922136625] [2024-06-27 20:28:29,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:28:29,994 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:28:29,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:28:30,649 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:28:30,649 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:28:30,649 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1922136625] [2024-06-27 20:28:30,649 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1922136625] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:28:30,649 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:28:30,649 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:28:30,650 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1298249525] [2024-06-27 20:28:30,650 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:28:30,650 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:28:30,650 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:28:30,653 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:28:30,654 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:28:30,710 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-27 20:28:30,710 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 262 places, 350 transitions, 3915 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:28:30,711 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:28:30,711 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-27 20:28:30,711 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:28:31,520 INFO L124 PetriNetUnfolderBase]: 2701/4283 cut-off events. [2024-06-27 20:28:31,521 INFO L125 PetriNetUnfolderBase]: For 650624/650629 co-relation queries the response was YES. [2024-06-27 20:28:31,556 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42499 conditions, 4283 events. 2701/4283 cut-off events. For 650624/650629 co-relation queries the response was YES. Maximal size of possible extension queue 264. Compared 24588 event pairs, 601 based on Foata normal form. 5/4280 useless extension candidates. Maximal degree in co-relation 42374. Up to 3242 conditions per place. [2024-06-27 20:28:31,576 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 213 selfloop transitions, 153 changer transitions 0/371 dead transitions. [2024-06-27 20:28:31,576 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 270 places, 371 transitions, 5177 flow [2024-06-27 20:28:31,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:28:31,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:28:31,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 169 transitions. [2024-06-27 20:28:31,578 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4470899470899471 [2024-06-27 20:28:31,578 INFO L175 Difference]: Start difference. First operand has 262 places, 350 transitions, 3915 flow. Second operand 9 states and 169 transitions. [2024-06-27 20:28:31,578 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 270 places, 371 transitions, 5177 flow [2024-06-27 20:28:32,612 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 263 places, 371 transitions, 4969 flow, removed 56 selfloop flow, removed 7 redundant places. [2024-06-27 20:28:32,616 INFO L231 Difference]: Finished difference. Result has 264 places, 350 transitions, 4021 flow [2024-06-27 20:28:32,617 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3707, PETRI_DIFFERENCE_MINUEND_PLACES=255, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=350, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=153, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=197, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4021, PETRI_PLACES=264, PETRI_TRANSITIONS=350} [2024-06-27 20:28:32,617 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 221 predicate places. [2024-06-27 20:28:32,617 INFO L495 AbstractCegarLoop]: Abstraction has has 264 places, 350 transitions, 4021 flow [2024-06-27 20:28:32,617 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:28:32,617 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:28:32,617 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:28:32,617 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2024-06-27 20:28:32,618 INFO L420 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:28:32,618 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:28:32,618 INFO L85 PathProgramCache]: Analyzing trace with hash 420394574, now seen corresponding path program 8 times [2024-06-27 20:28:32,618 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:28:32,618 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [126370154] [2024-06-27 20:28:32,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:28:32,619 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:28:32,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:28:33,333 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:28:33,334 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:28:33,334 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [126370154] [2024-06-27 20:28:33,334 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [126370154] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:28:33,334 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:28:33,334 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:28:33,334 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [383717946] [2024-06-27 20:28:33,334 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:28:33,334 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:28:33,334 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:28:33,334 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:28:33,334 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:28:33,407 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-27 20:28:33,407 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 264 places, 350 transitions, 4021 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:28:33,407 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:28:33,407 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-27 20:28:33,407 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:28:34,211 INFO L124 PetriNetUnfolderBase]: 2740/4343 cut-off events. [2024-06-27 20:28:34,211 INFO L125 PetriNetUnfolderBase]: For 678771/678776 co-relation queries the response was YES. [2024-06-27 20:28:34,249 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43992 conditions, 4343 events. 2740/4343 cut-off events. For 678771/678776 co-relation queries the response was YES. Maximal size of possible extension queue 267. Compared 24927 event pairs, 642 based on Foata normal form. 5/4340 useless extension candidates. Maximal degree in co-relation 43866. Up to 3277 conditions per place. [2024-06-27 20:28:34,267 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 236 selfloop transitions, 141 changer transitions 0/382 dead transitions. [2024-06-27 20:28:34,268 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 272 places, 382 transitions, 5946 flow [2024-06-27 20:28:34,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:28:34,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:28:34,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 174 transitions. [2024-06-27 20:28:34,269 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4603174603174603 [2024-06-27 20:28:34,269 INFO L175 Difference]: Start difference. First operand has 264 places, 350 transitions, 4021 flow. Second operand 9 states and 174 transitions. [2024-06-27 20:28:34,269 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 272 places, 382 transitions, 5946 flow [2024-06-27 20:28:35,219 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 265 places, 382 transitions, 5642 flow, removed 12 selfloop flow, removed 7 redundant places. [2024-06-27 20:28:35,223 INFO L231 Difference]: Finished difference. Result has 268 places, 360 transitions, 4395 flow [2024-06-27 20:28:35,224 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3728, PETRI_DIFFERENCE_MINUEND_PLACES=257, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=350, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=131, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=217, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4395, PETRI_PLACES=268, PETRI_TRANSITIONS=360} [2024-06-27 20:28:35,224 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 225 predicate places. [2024-06-27 20:28:35,224 INFO L495 AbstractCegarLoop]: Abstraction has has 268 places, 360 transitions, 4395 flow [2024-06-27 20:28:35,224 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:28:35,224 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:28:35,224 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:28:35,224 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2024-06-27 20:28:35,225 INFO L420 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:28:35,225 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:28:35,225 INFO L85 PathProgramCache]: Analyzing trace with hash 171052702, now seen corresponding path program 9 times [2024-06-27 20:28:35,225 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:28:35,225 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1396143718] [2024-06-27 20:28:35,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:28:35,225 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:28:35,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:28:35,871 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:28:35,871 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:28:35,871 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1396143718] [2024-06-27 20:28:35,872 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1396143718] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:28:35,872 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:28:35,872 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:28:35,872 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1445386366] [2024-06-27 20:28:35,872 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:28:35,872 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:28:35,872 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:28:35,873 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:28:35,873 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:28:35,942 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-27 20:28:35,943 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 268 places, 360 transitions, 4395 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:28:35,943 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:28:35,943 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-27 20:28:35,943 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:28:36,826 INFO L124 PetriNetUnfolderBase]: 2747/4353 cut-off events. [2024-06-27 20:28:36,827 INFO L125 PetriNetUnfolderBase]: For 695018/695023 co-relation queries the response was YES. [2024-06-27 20:28:36,865 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44437 conditions, 4353 events. 2747/4353 cut-off events. For 695018/695023 co-relation queries the response was YES. Maximal size of possible extension queue 267. Compared 24994 event pairs, 647 based on Foata normal form. 5/4350 useless extension candidates. Maximal degree in co-relation 44308. Up to 3285 conditions per place. [2024-06-27 20:28:36,885 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 219 selfloop transitions, 160 changer transitions 0/384 dead transitions. [2024-06-27 20:28:36,885 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 276 places, 384 transitions, 5900 flow [2024-06-27 20:28:36,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:28:36,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:28:36,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 172 transitions. [2024-06-27 20:28:36,886 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.455026455026455 [2024-06-27 20:28:36,886 INFO L175 Difference]: Start difference. First operand has 268 places, 360 transitions, 4395 flow. Second operand 9 states and 172 transitions. [2024-06-27 20:28:36,886 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 276 places, 384 transitions, 5900 flow [2024-06-27 20:28:37,941 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 272 places, 384 transitions, 5569 flow, removed 80 selfloop flow, removed 4 redundant places. [2024-06-27 20:28:37,946 INFO L231 Difference]: Finished difference. Result has 273 places, 364 transitions, 4540 flow [2024-06-27 20:28:37,946 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4075, PETRI_DIFFERENCE_MINUEND_PLACES=264, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=360, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=156, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=203, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4540, PETRI_PLACES=273, PETRI_TRANSITIONS=364} [2024-06-27 20:28:37,946 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 230 predicate places. [2024-06-27 20:28:37,946 INFO L495 AbstractCegarLoop]: Abstraction has has 273 places, 364 transitions, 4540 flow [2024-06-27 20:28:37,946 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:28:37,946 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:28:37,947 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:28:37,947 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2024-06-27 20:28:37,947 INFO L420 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:28:37,947 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:28:37,947 INFO L85 PathProgramCache]: Analyzing trace with hash 125623010, now seen corresponding path program 10 times [2024-06-27 20:28:37,947 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:28:37,947 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [366539396] [2024-06-27 20:28:37,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:28:37,948 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:28:37,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:28:38,690 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:28:38,691 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:28:38,691 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [366539396] [2024-06-27 20:28:38,691 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [366539396] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:28:38,691 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:28:38,691 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:28:38,691 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [255500317] [2024-06-27 20:28:38,691 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:28:38,691 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:28:38,691 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:28:38,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:28:38,691 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:28:38,766 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-27 20:28:38,766 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 273 places, 364 transitions, 4540 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:28:38,766 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:28:38,766 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-27 20:28:38,766 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:28:39,568 INFO L124 PetriNetUnfolderBase]: 2742/4349 cut-off events. [2024-06-27 20:28:39,568 INFO L125 PetriNetUnfolderBase]: For 698445/698450 co-relation queries the response was YES. [2024-06-27 20:28:39,605 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44215 conditions, 4349 events. 2742/4349 cut-off events. For 698445/698450 co-relation queries the response was YES. Maximal size of possible extension queue 267. Compared 24999 event pairs, 640 based on Foata normal form. 5/4346 useless extension candidates. Maximal degree in co-relation 44085. Up to 3283 conditions per place. [2024-06-27 20:28:39,623 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 236 selfloop transitions, 143 changer transitions 0/384 dead transitions. [2024-06-27 20:28:39,623 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 281 places, 384 transitions, 5904 flow [2024-06-27 20:28:39,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:28:39,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:28:39,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 172 transitions. [2024-06-27 20:28:39,624 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.455026455026455 [2024-06-27 20:28:39,624 INFO L175 Difference]: Start difference. First operand has 273 places, 364 transitions, 4540 flow. Second operand 9 states and 172 transitions. [2024-06-27 20:28:39,624 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 281 places, 384 transitions, 5904 flow [2024-06-27 20:28:40,611 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 275 places, 384 transitions, 5460 flow, removed 99 selfloop flow, removed 6 redundant places. [2024-06-27 20:28:40,615 INFO L231 Difference]: Finished difference. Result has 276 places, 364 transitions, 4390 flow [2024-06-27 20:28:40,615 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4096, PETRI_DIFFERENCE_MINUEND_PLACES=267, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=364, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=143, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=221, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4390, PETRI_PLACES=276, PETRI_TRANSITIONS=364} [2024-06-27 20:28:40,616 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 233 predicate places. [2024-06-27 20:28:40,616 INFO L495 AbstractCegarLoop]: Abstraction has has 276 places, 364 transitions, 4390 flow [2024-06-27 20:28:40,616 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:28:40,616 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:28:40,616 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:28:40,616 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2024-06-27 20:28:40,616 INFO L420 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:28:40,617 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:28:40,617 INFO L85 PathProgramCache]: Analyzing trace with hash 125623444, now seen corresponding path program 5 times [2024-06-27 20:28:40,617 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:28:40,617 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1133355793] [2024-06-27 20:28:40,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:28:40,617 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:28:40,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:28:41,324 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:28:41,325 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:28:41,325 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1133355793] [2024-06-27 20:28:41,325 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1133355793] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:28:41,325 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:28:41,325 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:28:41,325 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1201713592] [2024-06-27 20:28:41,325 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:28:41,325 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:28:41,326 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:28:41,326 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:28:41,326 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:28:41,384 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-27 20:28:41,385 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 276 places, 364 transitions, 4390 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:28:41,385 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:28:41,385 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-27 20:28:41,385 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:28:42,166 INFO L124 PetriNetUnfolderBase]: 2739/4323 cut-off events. [2024-06-27 20:28:42,166 INFO L125 PetriNetUnfolderBase]: For 700612/700620 co-relation queries the response was YES. [2024-06-27 20:28:42,204 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43991 conditions, 4323 events. 2739/4323 cut-off events. For 700612/700620 co-relation queries the response was YES. Maximal size of possible extension queue 266. Compared 24547 event pairs, 682 based on Foata normal form. 7/4327 useless extension candidates. Maximal degree in co-relation 43860. Up to 4031 conditions per place. [2024-06-27 20:28:42,223 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 319 selfloop transitions, 52 changer transitions 0/376 dead transitions. [2024-06-27 20:28:42,223 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 284 places, 376 transitions, 5160 flow [2024-06-27 20:28:42,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:28:42,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:28:42,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 155 transitions. [2024-06-27 20:28:42,224 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41005291005291006 [2024-06-27 20:28:42,224 INFO L175 Difference]: Start difference. First operand has 276 places, 364 transitions, 4390 flow. Second operand 9 states and 155 transitions. [2024-06-27 20:28:42,224 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 284 places, 376 transitions, 5160 flow [2024-06-27 20:28:43,389 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 277 places, 376 transitions, 4805 flow, removed 40 selfloop flow, removed 7 redundant places. [2024-06-27 20:28:43,393 INFO L231 Difference]: Finished difference. Result has 278 places, 364 transitions, 4145 flow [2024-06-27 20:28:43,393 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4035, PETRI_DIFFERENCE_MINUEND_PLACES=269, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=364, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=312, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4145, PETRI_PLACES=278, PETRI_TRANSITIONS=364} [2024-06-27 20:28:43,394 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 235 predicate places. [2024-06-27 20:28:43,394 INFO L495 AbstractCegarLoop]: Abstraction has has 278 places, 364 transitions, 4145 flow [2024-06-27 20:28:43,394 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:28:43,394 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:28:43,394 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:28:43,394 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2024-06-27 20:28:43,394 INFO L420 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:28:43,395 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:28:43,395 INFO L85 PathProgramCache]: Analyzing trace with hash 1759907768, now seen corresponding path program 1 times [2024-06-27 20:28:43,395 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:28:43,395 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1480351665] [2024-06-27 20:28:43,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:28:43,395 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:28:43,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:28:44,112 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:28:44,113 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:28:44,113 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1480351665] [2024-06-27 20:28:44,113 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1480351665] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:28:44,113 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:28:44,113 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:28:44,113 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [764338993] [2024-06-27 20:28:44,113 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:28:44,113 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:28:44,114 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:28:44,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:28:44,114 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:28:44,227 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-27 20:28:44,227 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 278 places, 364 transitions, 4145 flow. Second operand has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 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) [2024-06-27 20:28:44,227 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:28:44,227 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-27 20:28:44,227 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:28:45,105 INFO L124 PetriNetUnfolderBase]: 2549/4135 cut-off events. [2024-06-27 20:28:45,106 INFO L125 PetriNetUnfolderBase]: For 722085/722087 co-relation queries the response was YES. [2024-06-27 20:28:45,150 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42551 conditions, 4135 events. 2549/4135 cut-off events. For 722085/722087 co-relation queries the response was YES. Maximal size of possible extension queue 270. Compared 24415 event pairs, 553 based on Foata normal form. 2/4129 useless extension candidates. Maximal degree in co-relation 42419. Up to 3507 conditions per place. [2024-06-27 20:28:45,173 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 320 selfloop transitions, 15 changer transitions 0/388 dead transitions. [2024-06-27 20:28:45,173 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 285 places, 388 transitions, 4935 flow [2024-06-27 20:28:45,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:28:45,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:28:45,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 156 transitions. [2024-06-27 20:28:45,174 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4642857142857143 [2024-06-27 20:28:45,174 INFO L175 Difference]: Start difference. First operand has 278 places, 364 transitions, 4145 flow. Second operand 8 states and 156 transitions. [2024-06-27 20:28:45,174 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 285 places, 388 transitions, 4935 flow [2024-06-27 20:28:46,368 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 276 places, 388 transitions, 4763 flow, removed 12 selfloop flow, removed 9 redundant places. [2024-06-27 20:28:46,372 INFO L231 Difference]: Finished difference. Result has 277 places, 366 transitions, 4078 flow [2024-06-27 20:28:46,372 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3973, PETRI_DIFFERENCE_MINUEND_PLACES=269, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=364, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=349, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4078, PETRI_PLACES=277, PETRI_TRANSITIONS=366} [2024-06-27 20:28:46,373 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 234 predicate places. [2024-06-27 20:28:46,373 INFO L495 AbstractCegarLoop]: Abstraction has has 277 places, 366 transitions, 4078 flow [2024-06-27 20:28:46,373 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 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) [2024-06-27 20:28:46,373 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:28:46,373 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:28:46,373 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2024-06-27 20:28:46,373 INFO L420 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:28:46,374 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:28:46,374 INFO L85 PathProgramCache]: Analyzing trace with hash 1762764728, now seen corresponding path program 2 times [2024-06-27 20:28:46,374 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:28:46,374 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [722133092] [2024-06-27 20:28:46,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:28:46,374 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:28:46,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:28:47,237 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:28:47,237 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:28:47,237 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [722133092] [2024-06-27 20:28:47,237 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [722133092] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:28:47,237 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:28:47,237 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:28:47,238 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1191126707] [2024-06-27 20:28:47,238 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:28:47,238 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:28:47,238 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:28:47,238 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:28:47,238 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:28:47,347 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-27 20:28:47,347 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 277 places, 366 transitions, 4078 flow. Second operand has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 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) [2024-06-27 20:28:47,347 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:28:47,347 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-27 20:28:47,347 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:28:48,213 INFO L124 PetriNetUnfolderBase]: 2557/4147 cut-off events. [2024-06-27 20:28:48,213 INFO L125 PetriNetUnfolderBase]: For 737355/737357 co-relation queries the response was YES. [2024-06-27 20:28:48,250 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42904 conditions, 4147 events. 2557/4147 cut-off events. For 737355/737357 co-relation queries the response was YES. Maximal size of possible extension queue 272. Compared 24503 event pairs, 589 based on Foata normal form. 2/4141 useless extension candidates. Maximal degree in co-relation 42771. Up to 3536 conditions per place. [2024-06-27 20:28:48,267 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 317 selfloop transitions, 16 changer transitions 0/386 dead transitions. [2024-06-27 20:28:48,268 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 284 places, 386 transitions, 4858 flow [2024-06-27 20:28:48,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:28:48,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:28:48,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 153 transitions. [2024-06-27 20:28:48,269 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45535714285714285 [2024-06-27 20:28:48,269 INFO L175 Difference]: Start difference. First operand has 277 places, 366 transitions, 4078 flow. Second operand 8 states and 153 transitions. [2024-06-27 20:28:48,269 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 284 places, 386 transitions, 4858 flow [2024-06-27 20:28:49,520 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 278 places, 386 transitions, 4769 flow, removed 31 selfloop flow, removed 6 redundant places. [2024-06-27 20:28:49,524 INFO L231 Difference]: Finished difference. Result has 279 places, 368 transitions, 4100 flow [2024-06-27 20:28:49,524 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3989, PETRI_DIFFERENCE_MINUEND_PLACES=271, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=366, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=350, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4100, PETRI_PLACES=279, PETRI_TRANSITIONS=368} [2024-06-27 20:28:49,524 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 236 predicate places. [2024-06-27 20:28:49,524 INFO L495 AbstractCegarLoop]: Abstraction has has 279 places, 368 transitions, 4100 flow [2024-06-27 20:28:49,524 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 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) [2024-06-27 20:28:49,525 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:28:49,525 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:28:49,525 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2024-06-27 20:28:49,525 INFO L420 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:28:49,525 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:28:49,526 INFO L85 PathProgramCache]: Analyzing trace with hash 1762769688, now seen corresponding path program 1 times [2024-06-27 20:28:49,526 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:28:49,526 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1046466074] [2024-06-27 20:28:49,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:28:49,526 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:28:49,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:28:50,501 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:28:50,501 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:28:50,501 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1046466074] [2024-06-27 20:28:50,502 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1046466074] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:28:50,502 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:28:50,502 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:28:50,502 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1268274241] [2024-06-27 20:28:50,502 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:28:50,503 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:28:50,503 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:28:50,503 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:28:50,503 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:28:50,583 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-27 20:28:50,584 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 279 places, 368 transitions, 4100 flow. Second operand has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 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) [2024-06-27 20:28:50,584 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:28:50,584 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-27 20:28:50,584 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:28:51,413 INFO L124 PetriNetUnfolderBase]: 2668/4260 cut-off events. [2024-06-27 20:28:51,413 INFO L125 PetriNetUnfolderBase]: For 742555/742555 co-relation queries the response was YES. [2024-06-27 20:28:51,451 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43394 conditions, 4260 events. 2668/4260 cut-off events. For 742555/742555 co-relation queries the response was YES. Maximal size of possible extension queue 270. Compared 24638 event pairs, 637 based on Foata normal form. 2/4260 useless extension candidates. Maximal degree in co-relation 43260. Up to 3818 conditions per place. [2024-06-27 20:28:51,469 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 343 selfloop transitions, 20 changer transitions 0/389 dead transitions. [2024-06-27 20:28:51,470 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 287 places, 389 transitions, 4958 flow [2024-06-27 20:28:51,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:28:51,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:28:51,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 161 transitions. [2024-06-27 20:28:51,471 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42592592592592593 [2024-06-27 20:28:51,471 INFO L175 Difference]: Start difference. First operand has 279 places, 368 transitions, 4100 flow. Second operand 9 states and 161 transitions. [2024-06-27 20:28:51,471 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 287 places, 389 transitions, 4958 flow [2024-06-27 20:28:52,602 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 281 places, 389 transitions, 4863 flow, removed 33 selfloop flow, removed 6 redundant places. [2024-06-27 20:28:52,622 INFO L231 Difference]: Finished difference. Result has 282 places, 371 transitions, 4145 flow [2024-06-27 20:28:52,623 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4005, PETRI_DIFFERENCE_MINUEND_PLACES=273, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=368, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=348, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4145, PETRI_PLACES=282, PETRI_TRANSITIONS=371} [2024-06-27 20:28:52,623 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 239 predicate places. [2024-06-27 20:28:52,623 INFO L495 AbstractCegarLoop]: Abstraction has has 282 places, 371 transitions, 4145 flow [2024-06-27 20:28:52,624 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 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) [2024-06-27 20:28:52,624 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:28:52,624 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:28:52,624 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2024-06-27 20:28:52,624 INFO L420 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:28:52,624 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:28:52,624 INFO L85 PathProgramCache]: Analyzing trace with hash 1878055898, now seen corresponding path program 3 times [2024-06-27 20:28:52,625 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:28:52,625 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1523674907] [2024-06-27 20:28:52,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:28:52,625 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:28:52,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:28:53,459 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:28:53,460 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:28:53,460 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1523674907] [2024-06-27 20:28:53,460 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1523674907] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:28:53,460 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:28:53,460 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:28:53,460 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [832553068] [2024-06-27 20:28:53,460 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:28:53,461 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:28:53,461 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:28:53,461 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:28:53,461 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:28:53,544 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-27 20:28:53,544 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 282 places, 371 transitions, 4145 flow. Second operand has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 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) [2024-06-27 20:28:53,544 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:28:53,544 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-27 20:28:53,544 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:28:54,371 INFO L124 PetriNetUnfolderBase]: 2557/4151 cut-off events. [2024-06-27 20:28:54,372 INFO L125 PetriNetUnfolderBase]: For 762015/762019 co-relation queries the response was YES. [2024-06-27 20:28:54,410 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43246 conditions, 4151 events. 2557/4151 cut-off events. For 762015/762019 co-relation queries the response was YES. Maximal size of possible extension queue 274. Compared 24547 event pairs, 583 based on Foata normal form. 2/4139 useless extension candidates. Maximal degree in co-relation 43111. Up to 3547 conditions per place. [2024-06-27 20:28:54,427 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 322 selfloop transitions, 16 changer transitions 0/391 dead transitions. [2024-06-27 20:28:54,428 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 289 places, 391 transitions, 4963 flow [2024-06-27 20:28:54,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:28:54,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:28:54,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 150 transitions. [2024-06-27 20:28:54,429 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44642857142857145 [2024-06-27 20:28:54,429 INFO L175 Difference]: Start difference. First operand has 282 places, 371 transitions, 4145 flow. Second operand 8 states and 150 transitions. [2024-06-27 20:28:54,429 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 289 places, 391 transitions, 4963 flow [2024-06-27 20:28:55,580 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 282 places, 391 transitions, 4849 flow, removed 39 selfloop flow, removed 7 redundant places. [2024-06-27 20:28:55,584 INFO L231 Difference]: Finished difference. Result has 284 places, 376 transitions, 4184 flow [2024-06-27 20:28:55,584 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4031, PETRI_DIFFERENCE_MINUEND_PLACES=275, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=371, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=357, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4184, PETRI_PLACES=284, PETRI_TRANSITIONS=376} [2024-06-27 20:28:55,585 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 241 predicate places. [2024-06-27 20:28:55,585 INFO L495 AbstractCegarLoop]: Abstraction has has 284 places, 376 transitions, 4184 flow [2024-06-27 20:28:55,585 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 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) [2024-06-27 20:28:55,585 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:28:55,585 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:28:55,585 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2024-06-27 20:28:55,585 INFO L420 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:28:55,586 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:28:55,586 INFO L85 PathProgramCache]: Analyzing trace with hash 302754778, now seen corresponding path program 4 times [2024-06-27 20:28:55,586 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:28:55,586 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2068321899] [2024-06-27 20:28:55,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:28:55,586 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:28:55,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:28:56,430 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:28:56,431 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:28:56,431 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2068321899] [2024-06-27 20:28:56,431 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2068321899] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:28:56,431 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:28:56,431 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:28:56,431 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [126434022] [2024-06-27 20:28:56,431 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:28:56,432 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:28:56,432 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:28:56,432 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:28:56,432 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:28:56,527 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-27 20:28:56,527 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 284 places, 376 transitions, 4184 flow. Second operand has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 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) [2024-06-27 20:28:56,527 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:28:56,527 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-27 20:28:56,527 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:28:57,385 INFO L124 PetriNetUnfolderBase]: 2552/4145 cut-off events. [2024-06-27 20:28:57,385 INFO L125 PetriNetUnfolderBase]: For 768989/768998 co-relation queries the response was YES. [2024-06-27 20:28:57,425 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43323 conditions, 4145 events. 2552/4145 cut-off events. For 768989/768998 co-relation queries the response was YES. Maximal size of possible extension queue 274. Compared 24556 event pairs, 582 based on Foata normal form. 4/4128 useless extension candidates. Maximal degree in co-relation 43186. Up to 3531 conditions per place. [2024-06-27 20:28:57,444 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 317 selfloop transitions, 23 changer transitions 0/393 dead transitions. [2024-06-27 20:28:57,444 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 291 places, 393 transitions, 5004 flow [2024-06-27 20:28:57,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:28:57,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:28:57,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 150 transitions. [2024-06-27 20:28:57,445 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44642857142857145 [2024-06-27 20:28:57,445 INFO L175 Difference]: Start difference. First operand has 284 places, 376 transitions, 4184 flow. Second operand 8 states and 150 transitions. [2024-06-27 20:28:57,445 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 291 places, 393 transitions, 5004 flow [2024-06-27 20:28:58,833 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 286 places, 393 transitions, 4897 flow, removed 40 selfloop flow, removed 5 redundant places. [2024-06-27 20:28:58,837 INFO L231 Difference]: Finished difference. Result has 288 places, 381 transitions, 4250 flow [2024-06-27 20:28:58,837 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4077, PETRI_DIFFERENCE_MINUEND_PLACES=279, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=376, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=355, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4250, PETRI_PLACES=288, PETRI_TRANSITIONS=381} [2024-06-27 20:28:58,838 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 245 predicate places. [2024-06-27 20:28:58,838 INFO L495 AbstractCegarLoop]: Abstraction has has 288 places, 381 transitions, 4250 flow [2024-06-27 20:28:58,838 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 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) [2024-06-27 20:28:58,838 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:28:58,838 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:28:58,838 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2024-06-27 20:28:58,838 INFO L420 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:28:58,839 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:28:58,839 INFO L85 PathProgramCache]: Analyzing trace with hash 834206072, now seen corresponding path program 1 times [2024-06-27 20:28:58,839 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:28:58,839 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [210261973] [2024-06-27 20:28:58,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:28:58,839 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:28:58,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:28:59,771 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:28:59,772 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:28:59,772 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [210261973] [2024-06-27 20:28:59,772 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [210261973] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:28:59,772 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:28:59,772 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 20:28:59,772 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1215526939] [2024-06-27 20:28:59,772 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:28:59,772 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 20:28:59,773 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:28:59,773 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 20:28:59,773 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-06-27 20:28:59,868 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-27 20:28:59,868 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 288 places, 381 transitions, 4250 flow. Second operand has 11 states, 11 states have (on average 11.545454545454545) internal successors, (127), 11 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:28:59,868 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:28:59,869 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-27 20:28:59,869 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:29:00,771 INFO L124 PetriNetUnfolderBase]: 2747/4347 cut-off events. [2024-06-27 20:29:00,771 INFO L125 PetriNetUnfolderBase]: For 775736/775736 co-relation queries the response was YES. [2024-06-27 20:29:00,806 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44653 conditions, 4347 events. 2747/4347 cut-off events. For 775736/775736 co-relation queries the response was YES. Maximal size of possible extension queue 276. Compared 24842 event pairs, 657 based on Foata normal form. 2/4347 useless extension candidates. Maximal degree in co-relation 44514. Up to 4093 conditions per place. [2024-06-27 20:29:00,826 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 370 selfloop transitions, 22 changer transitions 0/397 dead transitions. [2024-06-27 20:29:00,826 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 297 places, 397 transitions, 5178 flow [2024-06-27 20:29:00,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:29:00,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:29:00,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 161 transitions. [2024-06-27 20:29:00,827 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38333333333333336 [2024-06-27 20:29:00,827 INFO L175 Difference]: Start difference. First operand has 288 places, 381 transitions, 4250 flow. Second operand 10 states and 161 transitions. [2024-06-27 20:29:00,827 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 297 places, 397 transitions, 5178 flow [2024-06-27 20:29:02,017 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 292 places, 397 transitions, 5051 flow, removed 43 selfloop flow, removed 5 redundant places. [2024-06-27 20:29:02,021 INFO L231 Difference]: Finished difference. Result has 293 places, 383 transitions, 4288 flow [2024-06-27 20:29:02,021 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4123, PETRI_DIFFERENCE_MINUEND_PLACES=283, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=381, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=359, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4288, PETRI_PLACES=293, PETRI_TRANSITIONS=383} [2024-06-27 20:29:02,022 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 250 predicate places. [2024-06-27 20:29:02,022 INFO L495 AbstractCegarLoop]: Abstraction has has 293 places, 383 transitions, 4288 flow [2024-06-27 20:29:02,022 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.545454545454545) internal successors, (127), 11 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:29:02,022 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:29:02,022 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:29:02,022 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2024-06-27 20:29:02,022 INFO L420 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:29:02,023 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:29:02,023 INFO L85 PathProgramCache]: Analyzing trace with hash -2096939156, now seen corresponding path program 1 times [2024-06-27 20:29:02,023 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:29:02,023 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1311724068] [2024-06-27 20:29:02,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:29:02,023 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:29:02,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:29:02,681 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:29:02,682 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:29:02,682 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1311724068] [2024-06-27 20:29:02,683 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1311724068] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:29:02,683 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:29:02,683 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:29:02,683 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1401872675] [2024-06-27 20:29:02,683 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:29:02,683 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:29:02,683 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:29:02,684 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:29:02,684 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:29:02,750 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-27 20:29:02,750 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 293 places, 383 transitions, 4288 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:29:02,750 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:29:02,750 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-27 20:29:02,750 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:29:03,690 INFO L124 PetriNetUnfolderBase]: 2783/4404 cut-off events. [2024-06-27 20:29:03,690 INFO L125 PetriNetUnfolderBase]: For 820954/820957 co-relation queries the response was YES. [2024-06-27 20:29:03,730 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45285 conditions, 4404 events. 2783/4404 cut-off events. For 820954/820957 co-relation queries the response was YES. Maximal size of possible extension queue 278. Compared 25223 event pairs, 515 based on Foata normal form. 12/4413 useless extension candidates. Maximal degree in co-relation 45145. Up to 3950 conditions per place. [2024-06-27 20:29:03,748 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 389 selfloop transitions, 27 changer transitions 0/421 dead transitions. [2024-06-27 20:29:03,748 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 301 places, 421 transitions, 5400 flow [2024-06-27 20:29:03,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:29:03,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:29:03,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 173 transitions. [2024-06-27 20:29:03,749 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4576719576719577 [2024-06-27 20:29:03,750 INFO L175 Difference]: Start difference. First operand has 293 places, 383 transitions, 4288 flow. Second operand 9 states and 173 transitions. [2024-06-27 20:29:03,750 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 301 places, 421 transitions, 5400 flow [2024-06-27 20:29:05,266 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 293 places, 421 transitions, 5251 flow, removed 54 selfloop flow, removed 8 redundant places. [2024-06-27 20:29:05,271 INFO L231 Difference]: Finished difference. Result has 294 places, 385 transitions, 4292 flow [2024-06-27 20:29:05,271 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4139, PETRI_DIFFERENCE_MINUEND_PLACES=285, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=383, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=356, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4292, PETRI_PLACES=294, PETRI_TRANSITIONS=385} [2024-06-27 20:29:05,271 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 251 predicate places. [2024-06-27 20:29:05,271 INFO L495 AbstractCegarLoop]: Abstraction has has 294 places, 385 transitions, 4292 flow [2024-06-27 20:29:05,272 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:29:05,272 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:29:05,272 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:29:05,272 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2024-06-27 20:29:05,272 INFO L420 AbstractCegarLoop]: === Iteration 98 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:29:05,272 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:29:05,272 INFO L85 PathProgramCache]: Analyzing trace with hash -119138500, now seen corresponding path program 2 times [2024-06-27 20:29:05,272 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:29:05,273 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [892661180] [2024-06-27 20:29:05,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:29:05,273 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:29:05,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:29:06,017 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:29:06,017 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:29:06,017 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [892661180] [2024-06-27 20:29:06,017 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [892661180] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:29:06,017 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:29:06,017 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:29:06,017 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2023583468] [2024-06-27 20:29:06,017 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:29:06,018 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:29:06,018 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:29:06,018 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:29:06,018 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:29:06,137 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-27 20:29:06,137 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 294 places, 385 transitions, 4292 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:29:06,137 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:29:06,137 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-27 20:29:06,137 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:29:07,137 INFO L124 PetriNetUnfolderBase]: 2899/4582 cut-off events. [2024-06-27 20:29:07,137 INFO L125 PetriNetUnfolderBase]: For 904453/904456 co-relation queries the response was YES. [2024-06-27 20:29:07,179 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48229 conditions, 4582 events. 2899/4582 cut-off events. For 904453/904456 co-relation queries the response was YES. Maximal size of possible extension queue 283. Compared 26373 event pairs, 689 based on Foata normal form. 14/4593 useless extension candidates. Maximal degree in co-relation 48088. Up to 4060 conditions per place. [2024-06-27 20:29:07,199 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 387 selfloop transitions, 33 changer transitions 0/425 dead transitions. [2024-06-27 20:29:07,200 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 302 places, 425 transitions, 5744 flow [2024-06-27 20:29:07,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:29:07,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:29:07,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 176 transitions. [2024-06-27 20:29:07,201 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4656084656084656 [2024-06-27 20:29:07,201 INFO L175 Difference]: Start difference. First operand has 294 places, 385 transitions, 4292 flow. Second operand 9 states and 176 transitions. [2024-06-27 20:29:07,201 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 302 places, 425 transitions, 5744 flow [2024-06-27 20:29:08,809 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 295 places, 425 transitions, 5625 flow, removed 34 selfloop flow, removed 7 redundant places. [2024-06-27 20:29:08,814 INFO L231 Difference]: Finished difference. Result has 296 places, 389 transitions, 4436 flow [2024-06-27 20:29:08,814 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4173, PETRI_DIFFERENCE_MINUEND_PLACES=287, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=385, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=354, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4436, PETRI_PLACES=296, PETRI_TRANSITIONS=389} [2024-06-27 20:29:08,815 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 253 predicate places. [2024-06-27 20:29:08,815 INFO L495 AbstractCegarLoop]: Abstraction has has 296 places, 389 transitions, 4436 flow [2024-06-27 20:29:08,815 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:29:08,815 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:29:08,815 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:29:08,815 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97 [2024-06-27 20:29:08,815 INFO L420 AbstractCegarLoop]: === Iteration 99 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:29:08,816 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:29:08,816 INFO L85 PathProgramCache]: Analyzing trace with hash -2089520546, now seen corresponding path program 3 times [2024-06-27 20:29:08,816 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:29:08,816 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1511158409] [2024-06-27 20:29:08,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:29:08,816 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:29:08,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:29:09,495 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:29:09,495 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:29:09,495 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1511158409] [2024-06-27 20:29:09,495 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1511158409] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:29:09,495 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:29:09,495 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:29:09,496 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1280907347] [2024-06-27 20:29:09,496 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:29:09,496 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:29:09,496 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:29:09,496 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:29:09,496 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:29:09,606 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-27 20:29:09,606 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 296 places, 389 transitions, 4436 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:29:09,606 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:29:09,606 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-27 20:29:09,606 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:29:10,634 INFO L124 PetriNetUnfolderBase]: 2871/4544 cut-off events. [2024-06-27 20:29:10,634 INFO L125 PetriNetUnfolderBase]: For 870381/870384 co-relation queries the response was YES. [2024-06-27 20:29:10,675 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46919 conditions, 4544 events. 2871/4544 cut-off events. For 870381/870384 co-relation queries the response was YES. Maximal size of possible extension queue 283. Compared 26189 event pairs, 703 based on Foata normal form. 14/4555 useless extension candidates. Maximal degree in co-relation 46777. Up to 4158 conditions per place. [2024-06-27 20:29:10,694 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 385 selfloop transitions, 30 changer transitions 0/420 dead transitions. [2024-06-27 20:29:10,695 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 304 places, 420 transitions, 5432 flow [2024-06-27 20:29:10,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:29:10,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:29:10,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 171 transitions. [2024-06-27 20:29:10,696 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4523809523809524 [2024-06-27 20:29:10,696 INFO L175 Difference]: Start difference. First operand has 296 places, 389 transitions, 4436 flow. Second operand 9 states and 171 transitions. [2024-06-27 20:29:10,696 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 304 places, 420 transitions, 5432 flow [2024-06-27 20:29:12,316 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 299 places, 420 transitions, 5255 flow, removed 71 selfloop flow, removed 5 redundant places. [2024-06-27 20:29:12,320 INFO L231 Difference]: Finished difference. Result has 300 places, 389 transitions, 4325 flow [2024-06-27 20:29:12,320 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4259, PETRI_DIFFERENCE_MINUEND_PLACES=291, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=389, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=359, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4325, PETRI_PLACES=300, PETRI_TRANSITIONS=389} [2024-06-27 20:29:12,321 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 257 predicate places. [2024-06-27 20:29:12,321 INFO L495 AbstractCegarLoop]: Abstraction has has 300 places, 389 transitions, 4325 flow [2024-06-27 20:29:12,321 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:29:12,321 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:29:12,321 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:29:12,321 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98 [2024-06-27 20:29:12,321 INFO L420 AbstractCegarLoop]: === Iteration 100 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:29:12,322 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:29:12,322 INFO L85 PathProgramCache]: Analyzing trace with hash -69358876, now seen corresponding path program 1 times [2024-06-27 20:29:12,322 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:29:12,322 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1621275714] [2024-06-27 20:29:12,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:29:12,322 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:29:12,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:29:13,058 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:29:13,059 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:29:13,059 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1621275714] [2024-06-27 20:29:13,059 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1621275714] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:29:13,059 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:29:13,059 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 20:29:13,059 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1435195275] [2024-06-27 20:29:13,059 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:29:13,059 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 20:29:13,060 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:29:13,060 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 20:29:13,060 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2024-06-27 20:29:13,136 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-27 20:29:13,137 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 300 places, 389 transitions, 4325 flow. Second operand has 11 states, 11 states have (on average 11.545454545454545) internal successors, (127), 11 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:29:13,137 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:29:13,137 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-27 20:29:13,137 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:29:14,164 INFO L124 PetriNetUnfolderBase]: 2886/4567 cut-off events. [2024-06-27 20:29:14,164 INFO L125 PetriNetUnfolderBase]: For 841487/841490 co-relation queries the response was YES. [2024-06-27 20:29:14,215 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47032 conditions, 4567 events. 2886/4567 cut-off events. For 841487/841490 co-relation queries the response was YES. Maximal size of possible extension queue 284. Compared 26291 event pairs, 704 based on Foata normal form. 5/4569 useless extension candidates. Maximal degree in co-relation 46888. Up to 4205 conditions per place. [2024-06-27 20:29:14,241 INFO L140 encePairwiseOnDemand]: 28/42 looper letters, 381 selfloop transitions, 36 changer transitions 0/422 dead transitions. [2024-06-27 20:29:14,241 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 309 places, 422 transitions, 5427 flow [2024-06-27 20:29:14,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:29:14,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:29:14,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 185 transitions. [2024-06-27 20:29:14,243 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44047619047619047 [2024-06-27 20:29:14,243 INFO L175 Difference]: Start difference. First operand has 300 places, 389 transitions, 4325 flow. Second operand 10 states and 185 transitions. [2024-06-27 20:29:14,243 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 309 places, 422 transitions, 5427 flow [2024-06-27 20:29:16,036 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 301 places, 422 transitions, 5361 flow, removed 1 selfloop flow, removed 8 redundant places. [2024-06-27 20:29:16,041 INFO L231 Difference]: Finished difference. Result has 302 places, 393 transitions, 4496 flow [2024-06-27 20:29:16,041 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4259, PETRI_DIFFERENCE_MINUEND_PLACES=292, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=389, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=353, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4496, PETRI_PLACES=302, PETRI_TRANSITIONS=393} [2024-06-27 20:29:16,041 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 259 predicate places. [2024-06-27 20:29:16,041 INFO L495 AbstractCegarLoop]: Abstraction has has 302 places, 393 transitions, 4496 flow [2024-06-27 20:29:16,041 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.545454545454545) internal successors, (127), 11 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:29:16,041 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:29:16,041 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:29:16,042 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99 [2024-06-27 20:29:16,042 INFO L420 AbstractCegarLoop]: === Iteration 101 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:29:16,042 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:29:16,042 INFO L85 PathProgramCache]: Analyzing trace with hash 1565624974, now seen corresponding path program 1 times [2024-06-27 20:29:16,042 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:29:16,043 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1089284962] [2024-06-27 20:29:16,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:29:16,043 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:29:16,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:29:16,759 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:29:16,759 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:29:16,759 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1089284962] [2024-06-27 20:29:16,759 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1089284962] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:29:16,759 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:29:16,759 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:29:16,759 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2122733135] [2024-06-27 20:29:16,760 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:29:16,760 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:29:16,760 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:29:16,760 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:29:16,760 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:29:16,855 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-27 20:29:16,855 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 302 places, 393 transitions, 4496 flow. Second operand has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:29:16,855 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:29:16,855 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-27 20:29:16,855 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:29:17,849 INFO L124 PetriNetUnfolderBase]: 2771/4457 cut-off events. [2024-06-27 20:29:17,849 INFO L125 PetriNetUnfolderBase]: For 854171/854171 co-relation queries the response was YES. [2024-06-27 20:29:17,892 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46982 conditions, 4457 events. 2771/4457 cut-off events. For 854171/854171 co-relation queries the response was YES. Maximal size of possible extension queue 286. Compared 26296 event pairs, 668 based on Foata normal form. 1/4441 useless extension candidates. Maximal degree in co-relation 46837. Up to 3833 conditions per place. [2024-06-27 20:29:17,911 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 348 selfloop transitions, 42 changer transitions 0/425 dead transitions. [2024-06-27 20:29:17,911 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 309 places, 425 transitions, 5474 flow [2024-06-27 20:29:17,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:29:17,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:29:17,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 162 transitions. [2024-06-27 20:29:17,913 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48214285714285715 [2024-06-27 20:29:17,913 INFO L175 Difference]: Start difference. First operand has 302 places, 393 transitions, 4496 flow. Second operand 8 states and 162 transitions. [2024-06-27 20:29:17,913 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 309 places, 425 transitions, 5474 flow [2024-06-27 20:29:19,683 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 301 places, 425 transitions, 5265 flow, removed 71 selfloop flow, removed 8 redundant places. [2024-06-27 20:29:19,688 INFO L231 Difference]: Finished difference. Result has 302 places, 399 transitions, 4515 flow [2024-06-27 20:29:19,688 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4287, PETRI_DIFFERENCE_MINUEND_PLACES=294, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=393, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=354, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4515, PETRI_PLACES=302, PETRI_TRANSITIONS=399} [2024-06-27 20:29:19,688 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 259 predicate places. [2024-06-27 20:29:19,688 INFO L495 AbstractCegarLoop]: Abstraction has has 302 places, 399 transitions, 4515 flow [2024-06-27 20:29:19,689 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:29:19,689 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:29:19,689 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:29:19,689 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100 [2024-06-27 20:29:19,689 INFO L420 AbstractCegarLoop]: === Iteration 102 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:29:19,689 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:29:19,689 INFO L85 PathProgramCache]: Analyzing trace with hash -962435276, now seen corresponding path program 2 times [2024-06-27 20:29:19,689 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:29:19,690 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1419399840] [2024-06-27 20:29:19,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:29:19,690 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:29:19,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:29:20,556 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:29:20,557 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:29:20,557 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1419399840] [2024-06-27 20:29:20,557 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1419399840] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:29:20,557 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:29:20,557 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:29:20,558 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [104912924] [2024-06-27 20:29:20,558 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:29:20,558 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:29:20,558 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:29:20,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:29:20,558 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:29:20,617 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-27 20:29:20,623 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 302 places, 399 transitions, 4515 flow. Second operand has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:29:20,623 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:29:20,623 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-27 20:29:20,623 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:29:21,636 INFO L124 PetriNetUnfolderBase]: 2776/4466 cut-off events. [2024-06-27 20:29:21,636 INFO L125 PetriNetUnfolderBase]: For 873146/873146 co-relation queries the response was YES. [2024-06-27 20:29:21,684 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47469 conditions, 4466 events. 2776/4466 cut-off events. For 873146/873146 co-relation queries the response was YES. Maximal size of possible extension queue 288. Compared 26404 event pairs, 668 based on Foata normal form. 1/4450 useless extension candidates. Maximal degree in co-relation 47323. Up to 3840 conditions per place. [2024-06-27 20:29:21,704 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 351 selfloop transitions, 39 changer transitions 0/425 dead transitions. [2024-06-27 20:29:21,705 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 309 places, 425 transitions, 5465 flow [2024-06-27 20:29:21,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:29:21,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:29:21,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 158 transitions. [2024-06-27 20:29:21,706 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47023809523809523 [2024-06-27 20:29:21,706 INFO L175 Difference]: Start difference. First operand has 302 places, 399 transitions, 4515 flow. Second operand 8 states and 158 transitions. [2024-06-27 20:29:21,706 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 309 places, 425 transitions, 5465 flow [2024-06-27 20:29:23,536 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 304 places, 425 transitions, 5287 flow, removed 50 selfloop flow, removed 5 redundant places. [2024-06-27 20:29:23,541 INFO L231 Difference]: Finished difference. Result has 305 places, 402 transitions, 4539 flow [2024-06-27 20:29:23,541 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4337, PETRI_DIFFERENCE_MINUEND_PLACES=297, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=399, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=360, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4539, PETRI_PLACES=305, PETRI_TRANSITIONS=402} [2024-06-27 20:29:23,541 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 262 predicate places. [2024-06-27 20:29:23,541 INFO L495 AbstractCegarLoop]: Abstraction has has 305 places, 402 transitions, 4539 flow [2024-06-27 20:29:23,542 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:29:23,542 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:29:23,542 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:29:23,542 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101 [2024-06-27 20:29:23,542 INFO L420 AbstractCegarLoop]: === Iteration 103 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:29:23,542 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:29:23,542 INFO L85 PathProgramCache]: Analyzing trace with hash 1571286256, now seen corresponding path program 1 times [2024-06-27 20:29:23,542 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:29:23,543 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1928887852] [2024-06-27 20:29:23,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:29:23,543 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:29:23,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:29:24,493 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:29:24,494 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:29:24,494 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1928887852] [2024-06-27 20:29:24,494 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1928887852] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:29:24,494 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:29:24,494 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:29:24,494 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1140243531] [2024-06-27 20:29:24,494 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:29:24,495 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:29:24,495 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:29:24,495 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:29:24,495 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:29:24,578 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-27 20:29:24,578 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 305 places, 402 transitions, 4539 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:29:24,578 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:29:24,578 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-27 20:29:24,578 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:29:25,670 INFO L124 PetriNetUnfolderBase]: 2917/4609 cut-off events. [2024-06-27 20:29:25,671 INFO L125 PetriNetUnfolderBase]: For 892735/892735 co-relation queries the response was YES. [2024-06-27 20:29:25,720 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48992 conditions, 4609 events. 2917/4609 cut-off events. For 892735/892735 co-relation queries the response was YES. Maximal size of possible extension queue 290. Compared 26566 event pairs, 716 based on Foata normal form. 2/4606 useless extension candidates. Maximal degree in co-relation 48845. Up to 4202 conditions per place. [2024-06-27 20:29:25,743 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 381 selfloop transitions, 44 changer transitions 0/430 dead transitions. [2024-06-27 20:29:25,743 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 313 places, 430 transitions, 5593 flow [2024-06-27 20:29:25,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:29:25,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:29:25,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 168 transitions. [2024-06-27 20:29:25,744 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4444444444444444 [2024-06-27 20:29:25,744 INFO L175 Difference]: Start difference. First operand has 305 places, 402 transitions, 4539 flow. Second operand 9 states and 168 transitions. [2024-06-27 20:29:25,744 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 313 places, 430 transitions, 5593 flow [2024-06-27 20:29:27,883 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 307 places, 430 transitions, 5404 flow, removed 53 selfloop flow, removed 6 redundant places. [2024-06-27 20:29:27,889 INFO L231 Difference]: Finished difference. Result has 308 places, 406 transitions, 4597 flow [2024-06-27 20:29:27,889 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4350, PETRI_DIFFERENCE_MINUEND_PLACES=299, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=402, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=358, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4597, PETRI_PLACES=308, PETRI_TRANSITIONS=406} [2024-06-27 20:29:27,889 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 265 predicate places. [2024-06-27 20:29:27,889 INFO L495 AbstractCegarLoop]: Abstraction has has 308 places, 406 transitions, 4597 flow [2024-06-27 20:29:27,889 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:29:27,890 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:29:27,890 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:29:27,890 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102 [2024-06-27 20:29:27,890 INFO L420 AbstractCegarLoop]: === Iteration 104 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:29:27,890 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:29:27,890 INFO L85 PathProgramCache]: Analyzing trace with hash -962136746, now seen corresponding path program 3 times [2024-06-27 20:29:27,890 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:29:27,890 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1940562521] [2024-06-27 20:29:27,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:29:27,891 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:29:27,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:29:28,657 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:29:28,657 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:29:28,657 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1940562521] [2024-06-27 20:29:28,657 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1940562521] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:29:28,657 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:29:28,657 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:29:28,658 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [769387964] [2024-06-27 20:29:28,658 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:29:28,658 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:29:28,658 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:29:28,658 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:29:28,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:29:28,742 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-27 20:29:28,742 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 308 places, 406 transitions, 4597 flow. Second operand has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:29:28,742 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:29:28,743 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-27 20:29:28,743 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:29:29,727 INFO L124 PetriNetUnfolderBase]: 2791/4487 cut-off events. [2024-06-27 20:29:29,727 INFO L125 PetriNetUnfolderBase]: For 913588/913588 co-relation queries the response was YES. [2024-06-27 20:29:29,772 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48801 conditions, 4487 events. 2791/4487 cut-off events. For 913588/913588 co-relation queries the response was YES. Maximal size of possible extension queue 293. Compared 26548 event pairs, 666 based on Foata normal form. 1/4471 useless extension candidates. Maximal degree in co-relation 48653. Up to 3840 conditions per place. [2024-06-27 20:29:29,793 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 343 selfloop transitions, 50 changer transitions 0/429 dead transitions. [2024-06-27 20:29:29,794 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 315 places, 429 transitions, 5555 flow [2024-06-27 20:29:29,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:29:29,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:29:29,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 156 transitions. [2024-06-27 20:29:29,795 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4642857142857143 [2024-06-27 20:29:29,795 INFO L175 Difference]: Start difference. First operand has 308 places, 406 transitions, 4597 flow. Second operand 8 states and 156 transitions. [2024-06-27 20:29:29,795 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 315 places, 429 transitions, 5555 flow [2024-06-27 20:29:31,989 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 308 places, 429 transitions, 5336 flow, removed 68 selfloop flow, removed 7 redundant places. [2024-06-27 20:29:31,994 INFO L231 Difference]: Finished difference. Result has 309 places, 409 transitions, 4613 flow [2024-06-27 20:29:31,994 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4378, PETRI_DIFFERENCE_MINUEND_PLACES=301, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=406, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=356, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4613, PETRI_PLACES=309, PETRI_TRANSITIONS=409} [2024-06-27 20:29:31,995 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 266 predicate places. [2024-06-27 20:29:31,995 INFO L495 AbstractCegarLoop]: Abstraction has has 309 places, 409 transitions, 4613 flow [2024-06-27 20:29:31,995 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:29:31,995 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:29:31,995 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:29:31,995 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103 [2024-06-27 20:29:31,995 INFO L420 AbstractCegarLoop]: === Iteration 105 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:29:31,995 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:29:31,996 INFO L85 PathProgramCache]: Analyzing trace with hash -958411507, now seen corresponding path program 1 times [2024-06-27 20:29:31,996 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:29:31,996 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [868486876] [2024-06-27 20:29:31,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:29:31,996 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:29:32,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:29:32,718 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:29:32,719 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:29:32,719 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [868486876] [2024-06-27 20:29:32,719 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [868486876] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:29:32,719 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:29:32,719 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:29:32,719 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [846118136] [2024-06-27 20:29:32,719 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:29:32,719 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:29:32,719 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:29:32,719 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:29:32,719 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:29:32,800 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-27 20:29:32,800 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 309 places, 409 transitions, 4613 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:29:32,800 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:29:32,800 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-27 20:29:32,800 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:29:33,861 INFO L124 PetriNetUnfolderBase]: 2942/4649 cut-off events. [2024-06-27 20:29:33,861 INFO L125 PetriNetUnfolderBase]: For 947353/947356 co-relation queries the response was YES. [2024-06-27 20:29:34,019 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50307 conditions, 4649 events. 2942/4649 cut-off events. For 947353/947356 co-relation queries the response was YES. Maximal size of possible extension queue 295. Compared 26862 event pairs, 700 based on Foata normal form. 6/4652 useless extension candidates. Maximal degree in co-relation 50158. Up to 4282 conditions per place. [2024-06-27 20:29:34,040 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 401 selfloop transitions, 31 changer transitions 0/437 dead transitions. [2024-06-27 20:29:34,040 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 317 places, 437 transitions, 5674 flow [2024-06-27 20:29:34,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:29:34,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:29:34,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 166 transitions. [2024-06-27 20:29:34,041 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43915343915343913 [2024-06-27 20:29:34,041 INFO L175 Difference]: Start difference. First operand has 309 places, 409 transitions, 4613 flow. Second operand 9 states and 166 transitions. [2024-06-27 20:29:34,041 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 317 places, 437 transitions, 5674 flow [2024-06-27 20:29:36,104 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 311 places, 437 transitions, 5463 flow, removed 58 selfloop flow, removed 6 redundant places. [2024-06-27 20:29:36,110 INFO L231 Difference]: Finished difference. Result has 312 places, 413 transitions, 4582 flow [2024-06-27 20:29:36,110 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4402, PETRI_DIFFERENCE_MINUEND_PLACES=303, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=409, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=378, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4582, PETRI_PLACES=312, PETRI_TRANSITIONS=413} [2024-06-27 20:29:36,111 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 269 predicate places. [2024-06-27 20:29:36,111 INFO L495 AbstractCegarLoop]: Abstraction has has 312 places, 413 transitions, 4582 flow [2024-06-27 20:29:36,111 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:29:36,111 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:29:36,111 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:29:36,111 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104 [2024-06-27 20:29:36,111 INFO L420 AbstractCegarLoop]: === Iteration 106 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:29:36,112 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:29:36,112 INFO L85 PathProgramCache]: Analyzing trace with hash -1523846349, now seen corresponding path program 2 times [2024-06-27 20:29:36,112 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:29:36,112 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1775536082] [2024-06-27 20:29:36,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:29:36,113 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:29:36,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:29:36,797 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:29:36,797 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:29:36,797 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1775536082] [2024-06-27 20:29:36,798 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1775536082] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:29:36,798 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:29:36,798 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:29:36,798 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [622579909] [2024-06-27 20:29:36,798 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:29:36,798 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:29:36,798 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:29:36,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:29:36,799 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:29:36,857 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-27 20:29:36,857 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 312 places, 413 transitions, 4582 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:29:36,858 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:29:36,858 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-27 20:29:36,858 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:29:37,904 INFO L124 PetriNetUnfolderBase]: 2978/4717 cut-off events. [2024-06-27 20:29:37,904 INFO L125 PetriNetUnfolderBase]: For 976485/976488 co-relation queries the response was YES. [2024-06-27 20:29:37,952 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51153 conditions, 4717 events. 2978/4717 cut-off events. For 976485/976488 co-relation queries the response was YES. Maximal size of possible extension queue 298. Compared 27389 event pairs, 700 based on Foata normal form. 6/4720 useless extension candidates. Maximal degree in co-relation 51003. Up to 4070 conditions per place. [2024-06-27 20:29:37,975 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 358 selfloop transitions, 81 changer transitions 0/444 dead transitions. [2024-06-27 20:29:37,975 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 320 places, 444 transitions, 6179 flow [2024-06-27 20:29:37,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:29:37,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:29:37,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 171 transitions. [2024-06-27 20:29:37,976 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4523809523809524 [2024-06-27 20:29:37,976 INFO L175 Difference]: Start difference. First operand has 312 places, 413 transitions, 4582 flow. Second operand 9 states and 171 transitions. [2024-06-27 20:29:37,977 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 320 places, 444 transitions, 6179 flow [2024-06-27 20:29:40,177 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 313 places, 444 transitions, 6066 flow, removed 28 selfloop flow, removed 7 redundant places. [2024-06-27 20:29:40,189 INFO L231 Difference]: Finished difference. Result has 314 places, 420 transitions, 4839 flow [2024-06-27 20:29:40,190 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4469, PETRI_DIFFERENCE_MINUEND_PLACES=305, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=413, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=338, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4839, PETRI_PLACES=314, PETRI_TRANSITIONS=420} [2024-06-27 20:29:40,190 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 271 predicate places. [2024-06-27 20:29:40,190 INFO L495 AbstractCegarLoop]: Abstraction has has 314 places, 420 transitions, 4839 flow [2024-06-27 20:29:40,190 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:29:40,190 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:29:40,191 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:29:40,191 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105 [2024-06-27 20:29:40,191 INFO L420 AbstractCegarLoop]: === Iteration 107 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:29:40,191 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:29:40,191 INFO L85 PathProgramCache]: Analyzing trace with hash 245316877, now seen corresponding path program 3 times [2024-06-27 20:29:40,191 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:29:40,192 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [504187820] [2024-06-27 20:29:40,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:29:40,192 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:29:40,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:29:40,910 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:29:40,911 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:29:40,911 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [504187820] [2024-06-27 20:29:40,911 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [504187820] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:29:40,911 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:29:40,911 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:29:40,912 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2098820227] [2024-06-27 20:29:40,913 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:29:40,913 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:29:40,913 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:29:40,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:29:40,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:29:40,991 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-27 20:29:40,991 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 314 places, 420 transitions, 4839 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:29:40,991 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:29:40,991 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-27 20:29:40,991 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:29:41,995 INFO L124 PetriNetUnfolderBase]: 2998/4741 cut-off events. [2024-06-27 20:29:41,996 INFO L125 PetriNetUnfolderBase]: For 995186/995189 co-relation queries the response was YES. [2024-06-27 20:29:42,042 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51751 conditions, 4741 events. 2998/4741 cut-off events. For 995186/995189 co-relation queries the response was YES. Maximal size of possible extension queue 302. Compared 27500 event pairs, 671 based on Foata normal form. 6/4744 useless extension candidates. Maximal degree in co-relation 51600. Up to 4086 conditions per place. [2024-06-27 20:29:42,063 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 357 selfloop transitions, 85 changer transitions 0/447 dead transitions. [2024-06-27 20:29:42,063 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 322 places, 447 transitions, 6154 flow [2024-06-27 20:29:42,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:29:42,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:29:42,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 168 transitions. [2024-06-27 20:29:42,064 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4444444444444444 [2024-06-27 20:29:42,064 INFO L175 Difference]: Start difference. First operand has 314 places, 420 transitions, 4839 flow. Second operand 9 states and 168 transitions. [2024-06-27 20:29:42,064 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 322 places, 447 transitions, 6154 flow [2024-06-27 20:29:44,204 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 317 places, 447 transitions, 6000 flow, removed 36 selfloop flow, removed 5 redundant places. [2024-06-27 20:29:44,208 INFO L231 Difference]: Finished difference. Result has 318 places, 424 transitions, 4987 flow [2024-06-27 20:29:44,209 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4692, PETRI_DIFFERENCE_MINUEND_PLACES=309, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=420, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=81, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=338, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4987, PETRI_PLACES=318, PETRI_TRANSITIONS=424} [2024-06-27 20:29:44,209 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 275 predicate places. [2024-06-27 20:29:44,209 INFO L495 AbstractCegarLoop]: Abstraction has has 318 places, 424 transitions, 4987 flow [2024-06-27 20:29:44,209 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:29:44,209 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:29:44,209 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:29:44,209 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106 [2024-06-27 20:29:44,210 INFO L420 AbstractCegarLoop]: === Iteration 108 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:29:44,210 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:29:44,210 INFO L85 PathProgramCache]: Analyzing trace with hash 245049967, now seen corresponding path program 4 times [2024-06-27 20:29:44,210 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:29:44,210 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2103377124] [2024-06-27 20:29:44,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:29:44,210 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:29:44,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:29:44,886 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:29:44,886 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:29:44,886 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2103377124] [2024-06-27 20:29:44,886 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2103377124] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:29:44,887 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:29:44,887 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:29:44,887 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1816034421] [2024-06-27 20:29:44,887 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:29:44,887 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:29:44,887 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:29:44,887 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:29:44,887 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:29:44,979 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-27 20:29:44,979 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 318 places, 424 transitions, 4987 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:29:44,979 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:29:44,979 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-27 20:29:44,979 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:29:45,942 INFO L124 PetriNetUnfolderBase]: 2986/4725 cut-off events. [2024-06-27 20:29:45,942 INFO L125 PetriNetUnfolderBase]: For 988508/988511 co-relation queries the response was YES. [2024-06-27 20:29:45,988 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51274 conditions, 4725 events. 2986/4725 cut-off events. For 988508/988511 co-relation queries the response was YES. Maximal size of possible extension queue 301. Compared 27407 event pairs, 671 based on Foata normal form. 6/4728 useless extension candidates. Maximal degree in co-relation 51122. Up to 4078 conditions per place. [2024-06-27 20:29:46,008 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 358 selfloop transitions, 84 changer transitions 0/447 dead transitions. [2024-06-27 20:29:46,009 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 326 places, 447 transitions, 6185 flow [2024-06-27 20:29:46,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:29:46,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:29:46,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 169 transitions. [2024-06-27 20:29:46,010 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4470899470899471 [2024-06-27 20:29:46,010 INFO L175 Difference]: Start difference. First operand has 318 places, 424 transitions, 4987 flow. Second operand 9 states and 169 transitions. [2024-06-27 20:29:46,010 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 326 places, 447 transitions, 6185 flow [2024-06-27 20:29:48,256 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 320 places, 447 transitions, 5942 flow, removed 60 selfloop flow, removed 6 redundant places. [2024-06-27 20:29:48,260 INFO L231 Difference]: Finished difference. Result has 321 places, 424 transitions, 4919 flow [2024-06-27 20:29:48,260 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4744, PETRI_DIFFERENCE_MINUEND_PLACES=312, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=424, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=84, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=340, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4919, PETRI_PLACES=321, PETRI_TRANSITIONS=424} [2024-06-27 20:29:48,261 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 278 predicate places. [2024-06-27 20:29:48,261 INFO L495 AbstractCegarLoop]: Abstraction has has 321 places, 424 transitions, 4919 flow [2024-06-27 20:29:48,261 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:29:48,261 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:29:48,261 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:29:48,261 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107 [2024-06-27 20:29:48,261 INFO L420 AbstractCegarLoop]: === Iteration 109 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:29:48,262 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:29:48,262 INFO L85 PathProgramCache]: Analyzing trace with hash 234201858, now seen corresponding path program 4 times [2024-06-27 20:29:48,262 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:29:48,262 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [802657623] [2024-06-27 20:29:48,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:29:48,262 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:29:48,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:29:48,985 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:29:48,985 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:29:48,985 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [802657623] [2024-06-27 20:29:48,985 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [802657623] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:29:48,985 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:29:48,985 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:29:48,985 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [356413391] [2024-06-27 20:29:48,986 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:29:48,986 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:29:48,986 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:29:48,986 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:29:48,986 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:29:49,090 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-27 20:29:49,090 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 321 places, 424 transitions, 4919 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:29:49,091 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:29:49,091 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-27 20:29:49,091 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:29:50,268 INFO L124 PetriNetUnfolderBase]: 3030/4813 cut-off events. [2024-06-27 20:29:50,268 INFO L125 PetriNetUnfolderBase]: For 1052056/1052059 co-relation queries the response was YES. [2024-06-27 20:29:50,318 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51973 conditions, 4813 events. 3030/4813 cut-off events. For 1052056/1052059 co-relation queries the response was YES. Maximal size of possible extension queue 305. Compared 28232 event pairs, 693 based on Foata normal form. 14/4824 useless extension candidates. Maximal degree in co-relation 51820. Up to 4241 conditions per place. [2024-06-27 20:29:50,340 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 386 selfloop transitions, 61 changer transitions 0/452 dead transitions. [2024-06-27 20:29:50,340 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 329 places, 452 transitions, 6099 flow [2024-06-27 20:29:50,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:29:50,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:29:50,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 169 transitions. [2024-06-27 20:29:50,341 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4470899470899471 [2024-06-27 20:29:50,341 INFO L175 Difference]: Start difference. First operand has 321 places, 424 transitions, 4919 flow. Second operand 9 states and 169 transitions. [2024-06-27 20:29:50,342 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 329 places, 452 transitions, 6099 flow [2024-06-27 20:29:53,035 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 322 places, 452 transitions, 5957 flow, removed 1 selfloop flow, removed 7 redundant places. [2024-06-27 20:29:53,040 INFO L231 Difference]: Finished difference. Result has 323 places, 426 transitions, 5011 flow [2024-06-27 20:29:53,040 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4777, PETRI_DIFFERENCE_MINUEND_PLACES=314, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=424, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=363, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5011, PETRI_PLACES=323, PETRI_TRANSITIONS=426} [2024-06-27 20:29:53,040 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 280 predicate places. [2024-06-27 20:29:53,041 INFO L495 AbstractCegarLoop]: Abstraction has has 323 places, 426 transitions, 5011 flow [2024-06-27 20:29:53,041 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:29:53,041 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:29:53,041 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:29:53,041 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108 [2024-06-27 20:29:53,041 INFO L420 AbstractCegarLoop]: === Iteration 110 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:29:53,041 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:29:53,042 INFO L85 PathProgramCache]: Analyzing trace with hash 233875428, now seen corresponding path program 5 times [2024-06-27 20:29:53,042 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:29:53,042 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2021363433] [2024-06-27 20:29:53,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:29:53,042 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:29:53,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:29:53,729 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:29:53,730 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:29:53,730 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2021363433] [2024-06-27 20:29:53,730 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2021363433] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:29:53,730 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:29:53,730 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:29:53,730 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2050665429] [2024-06-27 20:29:53,730 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:29:53,730 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:29:53,731 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:29:53,731 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:29:53,731 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:29:53,867 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-27 20:29:53,867 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 323 places, 426 transitions, 5011 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:29:53,867 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:29:53,867 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-27 20:29:53,867 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:29:55,138 INFO L124 PetriNetUnfolderBase]: 3146/4989 cut-off events. [2024-06-27 20:29:55,138 INFO L125 PetriNetUnfolderBase]: For 1146591/1146594 co-relation queries the response was YES. [2024-06-27 20:29:55,183 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55405 conditions, 4989 events. 3146/4989 cut-off events. For 1146591/1146594 co-relation queries the response was YES. Maximal size of possible extension queue 308. Compared 29331 event pairs, 703 based on Foata normal form. 14/5000 useless extension candidates. Maximal degree in co-relation 55251. Up to 4231 conditions per place. [2024-06-27 20:29:55,204 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 390 selfloop transitions, 66 changer transitions 0/461 dead transitions. [2024-06-27 20:29:55,205 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 331 places, 461 transitions, 6621 flow [2024-06-27 20:29:55,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:29:55,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:29:55,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 173 transitions. [2024-06-27 20:29:55,205 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4576719576719577 [2024-06-27 20:29:55,206 INFO L175 Difference]: Start difference. First operand has 323 places, 426 transitions, 5011 flow. Second operand 9 states and 173 transitions. [2024-06-27 20:29:55,206 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 331 places, 461 transitions, 6621 flow [2024-06-27 20:29:57,514 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 324 places, 461 transitions, 6427 flow, removed 38 selfloop flow, removed 7 redundant places. [2024-06-27 20:29:57,518 INFO L231 Difference]: Finished difference. Result has 325 places, 430 transitions, 5170 flow [2024-06-27 20:29:57,519 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4817, PETRI_DIFFERENCE_MINUEND_PLACES=316, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=426, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=362, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5170, PETRI_PLACES=325, PETRI_TRANSITIONS=430} [2024-06-27 20:29:57,519 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 282 predicate places. [2024-06-27 20:29:57,519 INFO L495 AbstractCegarLoop]: Abstraction has has 325 places, 430 transitions, 5170 flow [2024-06-27 20:29:57,519 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:29:57,519 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:29:57,519 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:29:57,520 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109 [2024-06-27 20:29:57,520 INFO L420 AbstractCegarLoop]: === Iteration 111 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:29:57,520 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:29:57,520 INFO L85 PathProgramCache]: Analyzing trace with hash 244926618, now seen corresponding path program 6 times [2024-06-27 20:29:57,531 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:29:57,531 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [957773502] [2024-06-27 20:29:57,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:29:57,532 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:29:57,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:29:58,282 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:29:58,282 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:29:58,283 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [957773502] [2024-06-27 20:29:58,283 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [957773502] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:29:58,283 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:29:58,283 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:29:58,283 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [996127092] [2024-06-27 20:29:58,283 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:29:58,283 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:29:58,284 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:29:58,284 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:29:58,284 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:29:58,366 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-27 20:29:58,366 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 325 places, 430 transitions, 5170 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:29:58,366 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:29:58,366 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-27 20:29:58,366 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:29:59,505 INFO L124 PetriNetUnfolderBase]: 3118/4951 cut-off events. [2024-06-27 20:29:59,506 INFO L125 PetriNetUnfolderBase]: For 1099680/1099683 co-relation queries the response was YES. [2024-06-27 20:29:59,562 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53851 conditions, 4951 events. 3118/4951 cut-off events. For 1099680/1099683 co-relation queries the response was YES. Maximal size of possible extension queue 307. Compared 29201 event pairs, 711 based on Foata normal form. 14/4962 useless extension candidates. Maximal degree in co-relation 53696. Up to 4377 conditions per place. [2024-06-27 20:29:59,585 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 391 selfloop transitions, 60 changer transitions 0/456 dead transitions. [2024-06-27 20:29:59,586 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 333 places, 456 transitions, 6256 flow [2024-06-27 20:29:59,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:29:59,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:29:59,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 168 transitions. [2024-06-27 20:29:59,587 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4444444444444444 [2024-06-27 20:29:59,587 INFO L175 Difference]: Start difference. First operand has 325 places, 430 transitions, 5170 flow. Second operand 9 states and 168 transitions. [2024-06-27 20:29:59,587 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 333 places, 456 transitions, 6256 flow [2024-06-27 20:30:02,402 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 328 places, 456 transitions, 6025 flow, removed 77 selfloop flow, removed 5 redundant places. [2024-06-27 20:30:02,407 INFO L231 Difference]: Finished difference. Result has 329 places, 430 transitions, 5065 flow [2024-06-27 20:30:02,408 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4939, PETRI_DIFFERENCE_MINUEND_PLACES=320, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=430, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=370, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5065, PETRI_PLACES=329, PETRI_TRANSITIONS=430} [2024-06-27 20:30:02,408 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 286 predicate places. [2024-06-27 20:30:02,408 INFO L495 AbstractCegarLoop]: Abstraction has has 329 places, 430 transitions, 5065 flow [2024-06-27 20:30:02,408 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:30:02,408 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:30:02,408 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:30:02,409 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110 [2024-06-27 20:30:02,409 INFO L420 AbstractCegarLoop]: === Iteration 112 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:30:02,409 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:30:02,409 INFO L85 PathProgramCache]: Analyzing trace with hash 234213762, now seen corresponding path program 2 times [2024-06-27 20:30:02,409 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:30:02,410 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [558505706] [2024-06-27 20:30:02,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:30:02,410 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:30:02,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:30:03,132 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:30:03,132 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:30:03,132 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [558505706] [2024-06-27 20:30:03,132 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [558505706] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:30:03,132 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:30:03,132 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 20:30:03,132 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [271486157] [2024-06-27 20:30:03,133 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:30:03,133 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 20:30:03,133 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:30:03,133 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 20:30:03,133 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2024-06-27 20:30:03,246 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-27 20:30:03,246 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 329 places, 430 transitions, 5065 flow. Second operand has 11 states, 11 states have (on average 11.545454545454545) internal successors, (127), 11 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:30:03,246 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:30:03,247 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-27 20:30:03,247 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:30:04,363 INFO L124 PetriNetUnfolderBase]: 3189/5043 cut-off events. [2024-06-27 20:30:04,364 INFO L125 PetriNetUnfolderBase]: For 1107920/1107923 co-relation queries the response was YES. [2024-06-27 20:30:04,420 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55845 conditions, 5043 events. 3189/5043 cut-off events. For 1107920/1107923 co-relation queries the response was YES. Maximal size of possible extension queue 311. Compared 29598 event pairs, 741 based on Foata normal form. 5/5045 useless extension candidates. Maximal degree in co-relation 55688. Up to 4263 conditions per place. [2024-06-27 20:30:04,444 INFO L140 encePairwiseOnDemand]: 28/42 looper letters, 367 selfloop transitions, 96 changer transitions 0/468 dead transitions. [2024-06-27 20:30:04,445 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 338 places, 468 transitions, 7055 flow [2024-06-27 20:30:04,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:30:04,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:30:04,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 189 transitions. [2024-06-27 20:30:04,446 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45 [2024-06-27 20:30:04,446 INFO L175 Difference]: Start difference. First operand has 329 places, 430 transitions, 5065 flow. Second operand 10 states and 189 transitions. [2024-06-27 20:30:04,446 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 338 places, 468 transitions, 7055 flow [2024-06-27 20:30:07,208 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 330 places, 468 transitions, 6921 flow, removed 3 selfloop flow, removed 8 redundant places. [2024-06-27 20:30:07,213 INFO L231 Difference]: Finished difference. Result has 332 places, 442 transitions, 5707 flow [2024-06-27 20:30:07,214 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4931, PETRI_DIFFERENCE_MINUEND_PLACES=321, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=430, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=341, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5707, PETRI_PLACES=332, PETRI_TRANSITIONS=442} [2024-06-27 20:30:07,214 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 289 predicate places. [2024-06-27 20:30:07,214 INFO L495 AbstractCegarLoop]: Abstraction has has 332 places, 442 transitions, 5707 flow [2024-06-27 20:30:07,214 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.545454545454545) internal successors, (127), 11 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:30:07,214 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:30:07,215 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:30:07,215 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111 [2024-06-27 20:30:07,215 INFO L420 AbstractCegarLoop]: === Iteration 113 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:30:07,215 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:30:07,215 INFO L85 PathProgramCache]: Analyzing trace with hash -1516217869, now seen corresponding path program 1 times [2024-06-27 20:30:07,215 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:30:07,216 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1856116483] [2024-06-27 20:30:07,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:30:07,216 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:30:07,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:30:08,329 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:30:08,329 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:30:08,329 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1856116483] [2024-06-27 20:30:08,329 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1856116483] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:30:08,330 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:30:08,330 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 20:30:08,330 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1925605182] [2024-06-27 20:30:08,330 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:30:08,330 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 20:30:08,330 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:30:08,330 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 20:30:08,330 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2024-06-27 20:30:08,413 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-27 20:30:08,413 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 332 places, 442 transitions, 5707 flow. Second operand has 11 states, 11 states have (on average 11.545454545454545) internal successors, (127), 11 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:30:08,413 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:30:08,413 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-27 20:30:08,414 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:30:09,521 INFO L124 PetriNetUnfolderBase]: 3194/5021 cut-off events. [2024-06-27 20:30:09,522 INFO L125 PetriNetUnfolderBase]: For 1123693/1123693 co-relation queries the response was YES. [2024-06-27 20:30:09,580 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56980 conditions, 5021 events. 3194/5021 cut-off events. For 1123693/1123693 co-relation queries the response was YES. Maximal size of possible extension queue 311. Compared 29226 event pairs, 766 based on Foata normal form. 1/5020 useless extension candidates. Maximal degree in co-relation 56821. Up to 4747 conditions per place. [2024-06-27 20:30:09,606 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 436 selfloop transitions, 23 changer transitions 0/464 dead transitions. [2024-06-27 20:30:09,606 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 341 places, 464 transitions, 6813 flow [2024-06-27 20:30:09,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:30:09,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:30:09,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 167 transitions. [2024-06-27 20:30:09,607 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3976190476190476 [2024-06-27 20:30:09,607 INFO L175 Difference]: Start difference. First operand has 332 places, 442 transitions, 5707 flow. Second operand 10 states and 167 transitions. [2024-06-27 20:30:09,607 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 341 places, 464 transitions, 6813 flow [2024-06-27 20:30:12,649 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 336 places, 464 transitions, 6562 flow, removed 111 selfloop flow, removed 5 redundant places. [2024-06-27 20:30:12,654 INFO L231 Difference]: Finished difference. Result has 337 places, 445 transitions, 5656 flow [2024-06-27 20:30:12,654 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5460, PETRI_DIFFERENCE_MINUEND_PLACES=327, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=442, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=419, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5656, PETRI_PLACES=337, PETRI_TRANSITIONS=445} [2024-06-27 20:30:12,655 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 294 predicate places. [2024-06-27 20:30:12,655 INFO L495 AbstractCegarLoop]: Abstraction has has 337 places, 445 transitions, 5656 flow [2024-06-27 20:30:12,655 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.545454545454545) internal successors, (127), 11 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:30:12,655 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:30:12,655 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:30:12,655 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112 [2024-06-27 20:30:12,655 INFO L420 AbstractCegarLoop]: === Iteration 114 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:30:12,656 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:30:12,656 INFO L85 PathProgramCache]: Analyzing trace with hash 245326332, now seen corresponding path program 3 times [2024-06-27 20:30:12,656 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:30:12,656 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [617820329] [2024-06-27 20:30:12,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:30:12,656 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:30:12,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:30:13,377 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:30:13,377 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:30:13,377 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [617820329] [2024-06-27 20:30:13,377 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [617820329] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:30:13,378 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:30:13,378 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 20:30:13,378 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2125495054] [2024-06-27 20:30:13,378 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:30:13,378 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 20:30:13,378 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:30:13,378 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 20:30:13,379 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2024-06-27 20:30:13,486 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-27 20:30:13,487 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 337 places, 445 transitions, 5656 flow. Second operand has 11 states, 11 states have (on average 11.545454545454545) internal successors, (127), 11 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:30:13,487 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:30:13,487 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-27 20:30:13,487 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:30:14,701 INFO L124 PetriNetUnfolderBase]: 3213/5075 cut-off events. [2024-06-27 20:30:14,702 INFO L125 PetriNetUnfolderBase]: For 1147181/1147184 co-relation queries the response was YES. [2024-06-27 20:30:14,764 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57274 conditions, 5075 events. 3213/5075 cut-off events. For 1147181/1147184 co-relation queries the response was YES. Maximal size of possible extension queue 312. Compared 29790 event pairs, 701 based on Foata normal form. 5/5077 useless extension candidates. Maximal degree in co-relation 57113. Up to 4289 conditions per place. [2024-06-27 20:30:14,792 INFO L140 encePairwiseOnDemand]: 28/42 looper letters, 372 selfloop transitions, 98 changer transitions 0/475 dead transitions. [2024-06-27 20:30:14,792 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 346 places, 475 transitions, 7327 flow [2024-06-27 20:30:14,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:30:14,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:30:14,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 186 transitions. [2024-06-27 20:30:14,793 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44285714285714284 [2024-06-27 20:30:14,793 INFO L175 Difference]: Start difference. First operand has 337 places, 445 transitions, 5656 flow. Second operand 10 states and 186 transitions. [2024-06-27 20:30:14,794 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 346 places, 475 transitions, 7327 flow [2024-06-27 20:30:17,948 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 338 places, 475 transitions, 7153 flow, removed 66 selfloop flow, removed 8 redundant places. [2024-06-27 20:30:17,953 INFO L231 Difference]: Finished difference. Result has 339 places, 449 transitions, 5851 flow [2024-06-27 20:30:17,953 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5482, PETRI_DIFFERENCE_MINUEND_PLACES=329, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=445, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=94, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=350, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5851, PETRI_PLACES=339, PETRI_TRANSITIONS=449} [2024-06-27 20:30:17,954 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 296 predicate places. [2024-06-27 20:30:17,954 INFO L495 AbstractCegarLoop]: Abstraction has has 339 places, 449 transitions, 5851 flow [2024-06-27 20:30:17,954 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.545454545454545) internal successors, (127), 11 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:30:17,954 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:30:17,954 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:30:17,954 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113 [2024-06-27 20:30:17,954 INFO L420 AbstractCegarLoop]: === Iteration 115 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:30:17,955 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:30:17,955 INFO L85 PathProgramCache]: Analyzing trace with hash -1516606144, now seen corresponding path program 4 times [2024-06-27 20:30:17,955 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:30:17,958 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1829713756] [2024-06-27 20:30:17,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:30:17,958 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:30:17,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:30:18,638 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:30:18,639 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:30:18,639 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1829713756] [2024-06-27 20:30:18,639 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1829713756] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:30:18,639 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:30:18,639 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 20:30:18,639 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [746232464] [2024-06-27 20:30:18,639 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:30:18,641 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 20:30:18,641 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:30:18,641 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 20:30:18,641 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2024-06-27 20:30:18,741 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-27 20:30:18,742 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 339 places, 449 transitions, 5851 flow. Second operand has 11 states, 11 states have (on average 11.545454545454545) internal successors, (127), 11 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:30:18,742 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:30:18,742 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-27 20:30:18,742 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:30:19,895 INFO L124 PetriNetUnfolderBase]: 3228/5096 cut-off events. [2024-06-27 20:30:19,895 INFO L125 PetriNetUnfolderBase]: For 1169092/1169095 co-relation queries the response was YES. [2024-06-27 20:30:19,960 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58050 conditions, 5096 events. 3228/5096 cut-off events. For 1169092/1169095 co-relation queries the response was YES. Maximal size of possible extension queue 313. Compared 29872 event pairs, 709 based on Foata normal form. 5/5098 useless extension candidates. Maximal degree in co-relation 57888. Up to 4303 conditions per place. [2024-06-27 20:30:19,986 INFO L140 encePairwiseOnDemand]: 28/42 looper letters, 373 selfloop transitions, 101 changer transitions 0/479 dead transitions. [2024-06-27 20:30:19,986 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 348 places, 479 transitions, 7542 flow [2024-06-27 20:30:19,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:30:19,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:30:19,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 188 transitions. [2024-06-27 20:30:19,987 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44761904761904764 [2024-06-27 20:30:19,987 INFO L175 Difference]: Start difference. First operand has 339 places, 449 transitions, 5851 flow. Second operand 10 states and 188 transitions. [2024-06-27 20:30:19,987 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 348 places, 479 transitions, 7542 flow [2024-06-27 20:30:23,270 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 340 places, 479 transitions, 7159 flow, removed 89 selfloop flow, removed 8 redundant places. [2024-06-27 20:30:23,275 INFO L231 Difference]: Finished difference. Result has 341 places, 453 transitions, 5848 flow [2024-06-27 20:30:23,275 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5479, PETRI_DIFFERENCE_MINUEND_PLACES=331, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=449, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=97, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=352, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5848, PETRI_PLACES=341, PETRI_TRANSITIONS=453} [2024-06-27 20:30:23,275 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 298 predicate places. [2024-06-27 20:30:23,276 INFO L495 AbstractCegarLoop]: Abstraction has has 341 places, 453 transitions, 5848 flow [2024-06-27 20:30:23,276 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.545454545454545) internal successors, (127), 11 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:30:23,276 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:30:23,276 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:30:23,276 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable114 [2024-06-27 20:30:23,276 INFO L420 AbstractCegarLoop]: === Iteration 116 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:30:23,277 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:30:23,277 INFO L85 PathProgramCache]: Analyzing trace with hash 245313312, now seen corresponding path program 5 times [2024-06-27 20:30:23,277 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:30:23,277 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [962965572] [2024-06-27 20:30:23,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:30:23,277 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:30:23,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:30:23,982 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:30:23,983 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:30:23,983 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [962965572] [2024-06-27 20:30:23,983 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [962965572] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:30:23,983 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:30:23,983 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 20:30:23,983 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [297313904] [2024-06-27 20:30:23,983 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:30:23,984 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 20:30:23,984 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:30:23,985 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 20:30:23,985 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2024-06-27 20:30:24,066 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-27 20:30:24,066 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 341 places, 453 transitions, 5848 flow. Second operand has 11 states, 11 states have (on average 11.545454545454545) internal successors, (127), 11 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:30:24,067 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:30:24,067 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-27 20:30:24,067 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:30:25,257 INFO L124 PetriNetUnfolderBase]: 3223/5090 cut-off events. [2024-06-27 20:30:25,257 INFO L125 PetriNetUnfolderBase]: For 1166147/1166150 co-relation queries the response was YES. [2024-06-27 20:30:25,319 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57360 conditions, 5090 events. 3223/5090 cut-off events. For 1166147/1166150 co-relation queries the response was YES. Maximal size of possible extension queue 313. Compared 29854 event pairs, 705 based on Foata normal form. 5/5092 useless extension candidates. Maximal degree in co-relation 57198. Up to 4301 conditions per place. [2024-06-27 20:30:25,344 INFO L140 encePairwiseOnDemand]: 28/42 looper letters, 373 selfloop transitions, 100 changer transitions 0/478 dead transitions. [2024-06-27 20:30:25,345 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 350 places, 478 transitions, 7140 flow [2024-06-27 20:30:25,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:30:25,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:30:25,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 186 transitions. [2024-06-27 20:30:25,346 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44285714285714284 [2024-06-27 20:30:25,346 INFO L175 Difference]: Start difference. First operand has 341 places, 453 transitions, 5848 flow. Second operand 10 states and 186 transitions. [2024-06-27 20:30:25,346 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 350 places, 478 transitions, 7140 flow [2024-06-27 20:30:28,940 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 343 places, 478 transitions, 6722 flow, removed 133 selfloop flow, removed 7 redundant places. [2024-06-27 20:30:28,949 INFO L231 Difference]: Finished difference. Result has 344 places, 453 transitions, 5637 flow [2024-06-27 20:30:28,949 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5430, PETRI_DIFFERENCE_MINUEND_PLACES=334, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=453, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=100, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=353, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5637, PETRI_PLACES=344, PETRI_TRANSITIONS=453} [2024-06-27 20:30:28,950 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 301 predicate places. [2024-06-27 20:30:28,950 INFO L495 AbstractCegarLoop]: Abstraction has has 344 places, 453 transitions, 5637 flow [2024-06-27 20:30:28,950 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.545454545454545) internal successors, (127), 11 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:30:28,950 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:30:28,950 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:30:28,950 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115 [2024-06-27 20:30:28,950 INFO L420 AbstractCegarLoop]: === Iteration 117 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:30:28,951 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:30:28,951 INFO L85 PathProgramCache]: Analyzing trace with hash -836602308, now seen corresponding path program 4 times [2024-06-27 20:30:28,951 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:30:28,951 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [647802636] [2024-06-27 20:30:28,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:30:28,951 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:30:28,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:30:29,638 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:30:29,639 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:30:29,639 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [647802636] [2024-06-27 20:30:29,639 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [647802636] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:30:29,639 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:30:29,639 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:30:29,639 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1232251058] [2024-06-27 20:30:29,639 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:30:29,639 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:30:29,640 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:30:29,640 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:30:29,640 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:30:29,736 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-27 20:30:29,737 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 344 places, 453 transitions, 5637 flow. Second operand has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:30:29,737 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:30:29,737 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-27 20:30:29,737 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:30:30,943 INFO L124 PetriNetUnfolderBase]: 3057/4911 cut-off events. [2024-06-27 20:30:30,943 INFO L125 PetriNetUnfolderBase]: For 1171468/1171470 co-relation queries the response was YES. [2024-06-27 20:30:30,999 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56010 conditions, 4911 events. 3057/4911 cut-off events. For 1171468/1171470 co-relation queries the response was YES. Maximal size of possible extension queue 315. Compared 29575 event pairs, 715 based on Foata normal form. 3/4885 useless extension candidates. Maximal degree in co-relation 55847. Up to 4198 conditions per place. [2024-06-27 20:30:31,022 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 389 selfloop transitions, 51 changer transitions 0/479 dead transitions. [2024-06-27 20:30:31,022 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 350 places, 479 transitions, 6719 flow [2024-06-27 20:30:31,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:30:31,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:30:31,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 146 transitions. [2024-06-27 20:30:31,023 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4965986394557823 [2024-06-27 20:30:31,023 INFO L175 Difference]: Start difference. First operand has 344 places, 453 transitions, 5637 flow. Second operand 7 states and 146 transitions. [2024-06-27 20:30:31,024 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 350 places, 479 transitions, 6719 flow [2024-06-27 20:30:34,940 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 341 places, 479 transitions, 6467 flow, removed 9 selfloop flow, removed 9 redundant places. [2024-06-27 20:30:34,945 INFO L231 Difference]: Finished difference. Result has 342 places, 456 transitions, 5644 flow [2024-06-27 20:30:34,945 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5385, PETRI_DIFFERENCE_MINUEND_PLACES=335, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=453, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=402, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5644, PETRI_PLACES=342, PETRI_TRANSITIONS=456} [2024-06-27 20:30:34,946 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 299 predicate places. [2024-06-27 20:30:34,946 INFO L495 AbstractCegarLoop]: Abstraction has has 342 places, 456 transitions, 5644 flow [2024-06-27 20:30:34,946 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:30:34,946 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:30:34,946 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:30:34,947 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116 [2024-06-27 20:30:34,947 INFO L420 AbstractCegarLoop]: === Iteration 118 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:30:34,947 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:30:34,947 INFO L85 PathProgramCache]: Analyzing trace with hash 133358514, now seen corresponding path program 2 times [2024-06-27 20:30:34,947 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:30:34,947 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [798174040] [2024-06-27 20:30:34,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:30:34,948 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:30:34,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:30:35,697 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:30:35,697 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:30:35,697 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [798174040] [2024-06-27 20:30:35,697 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [798174040] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:30:35,697 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:30:35,698 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:30:35,698 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [158656813] [2024-06-27 20:30:35,698 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:30:35,698 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:30:35,698 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:30:35,698 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:30:35,699 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:30:35,787 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-27 20:30:35,788 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 342 places, 456 transitions, 5644 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:30:35,788 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:30:35,788 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-27 20:30:35,788 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:30:37,295 INFO L124 PetriNetUnfolderBase]: 3233/5075 cut-off events. [2024-06-27 20:30:37,295 INFO L125 PetriNetUnfolderBase]: For 1191327/1191329 co-relation queries the response was YES. [2024-06-27 20:30:37,365 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57472 conditions, 5075 events. 3233/5075 cut-off events. For 1191327/1191329 co-relation queries the response was YES. Maximal size of possible extension queue 314. Compared 29529 event pairs, 801 based on Foata normal form. 1/5065 useless extension candidates. Maximal degree in co-relation 57309. Up to 4670 conditions per place. [2024-06-27 20:30:37,391 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 429 selfloop transitions, 46 changer transitions 0/480 dead transitions. [2024-06-27 20:30:37,391 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 350 places, 480 transitions, 6784 flow [2024-06-27 20:30:37,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:30:37,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:30:37,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 164 transitions. [2024-06-27 20:30:37,392 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43386243386243384 [2024-06-27 20:30:37,392 INFO L175 Difference]: Start difference. First operand has 342 places, 456 transitions, 5644 flow. Second operand 9 states and 164 transitions. [2024-06-27 20:30:37,392 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 350 places, 480 transitions, 6784 flow [2024-06-27 20:30:40,901 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 345 places, 480 transitions, 6609 flow, removed 45 selfloop flow, removed 5 redundant places. [2024-06-27 20:30:40,906 INFO L231 Difference]: Finished difference. Result has 346 places, 459 transitions, 5711 flow [2024-06-27 20:30:40,907 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5469, PETRI_DIFFERENCE_MINUEND_PLACES=337, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=456, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=410, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5711, PETRI_PLACES=346, PETRI_TRANSITIONS=459} [2024-06-27 20:30:40,907 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 303 predicate places. [2024-06-27 20:30:40,907 INFO L495 AbstractCegarLoop]: Abstraction has has 346 places, 459 transitions, 5711 flow [2024-06-27 20:30:40,907 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:30:40,907 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:30:40,907 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:30:40,908 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117 [2024-06-27 20:30:40,908 INFO L420 AbstractCegarLoop]: === Iteration 119 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:30:40,908 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:30:40,908 INFO L85 PathProgramCache]: Analyzing trace with hash -1543407522, now seen corresponding path program 5 times [2024-06-27 20:30:40,909 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:30:40,909 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1086011506] [2024-06-27 20:30:40,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:30:40,909 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:30:40,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:30:41,859 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:30:41,859 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:30:41,859 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1086011506] [2024-06-27 20:30:41,859 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1086011506] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:30:41,859 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:30:41,859 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:30:41,859 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2042848496] [2024-06-27 20:30:41,859 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:30:41,859 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:30:41,859 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:30:41,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:30:41,859 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:30:41,957 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-27 20:30:41,958 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 346 places, 459 transitions, 5711 flow. Second operand has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:30:41,958 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:30:41,958 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-27 20:30:41,958 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:30:43,199 INFO L124 PetriNetUnfolderBase]: 3067/4938 cut-off events. [2024-06-27 20:30:43,199 INFO L125 PetriNetUnfolderBase]: For 1220717/1220723 co-relation queries the response was YES. [2024-06-27 20:30:43,262 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56652 conditions, 4938 events. 3067/4938 cut-off events. For 1220717/1220723 co-relation queries the response was YES. Maximal size of possible extension queue 318. Compared 29909 event pairs, 699 based on Foata normal form. 7/4891 useless extension candidates. Maximal degree in co-relation 56488. Up to 4136 conditions per place. [2024-06-27 20:30:43,289 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 364 selfloop transitions, 76 changer transitions 0/480 dead transitions. [2024-06-27 20:30:43,289 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 352 places, 480 transitions, 6799 flow [2024-06-27 20:30:43,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:30:43,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:30:43,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 141 transitions. [2024-06-27 20:30:43,290 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47959183673469385 [2024-06-27 20:30:43,290 INFO L175 Difference]: Start difference. First operand has 346 places, 459 transitions, 5711 flow. Second operand 7 states and 141 transitions. [2024-06-27 20:30:43,290 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 352 places, 480 transitions, 6799 flow [2024-06-27 20:30:46,757 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 345 places, 480 transitions, 6579 flow, removed 66 selfloop flow, removed 7 redundant places. [2024-06-27 20:30:46,763 INFO L231 Difference]: Finished difference. Result has 346 places, 462 transitions, 5808 flow [2024-06-27 20:30:46,763 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5491, PETRI_DIFFERENCE_MINUEND_PLACES=339, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=459, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=73, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=383, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5808, PETRI_PLACES=346, PETRI_TRANSITIONS=462} [2024-06-27 20:30:46,763 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 303 predicate places. [2024-06-27 20:30:46,763 INFO L495 AbstractCegarLoop]: Abstraction has has 346 places, 462 transitions, 5808 flow [2024-06-27 20:30:46,764 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:30:46,764 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:30:46,764 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:30:46,764 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118 [2024-06-27 20:30:46,764 INFO L420 AbstractCegarLoop]: === Iteration 120 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:30:46,764 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:30:46,764 INFO L85 PathProgramCache]: Analyzing trace with hash 488037264, now seen corresponding path program 3 times [2024-06-27 20:30:46,764 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:30:46,765 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1123026614] [2024-06-27 20:30:46,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:30:46,765 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:30:46,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:30:47,666 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:30:47,666 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:30:47,666 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1123026614] [2024-06-27 20:30:47,666 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1123026614] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:30:47,666 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:30:47,666 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:30:47,666 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [513905348] [2024-06-27 20:30:47,667 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:30:47,667 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:30:47,667 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:30:47,667 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:30:47,667 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:30:47,757 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-27 20:30:47,757 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 346 places, 462 transitions, 5808 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:30:47,757 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:30:47,757 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-27 20:30:47,757 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:30:48,941 INFO L124 PetriNetUnfolderBase]: 3243/5091 cut-off events. [2024-06-27 20:30:48,941 INFO L125 PetriNetUnfolderBase]: For 1238385/1238387 co-relation queries the response was YES. [2024-06-27 20:30:49,000 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58701 conditions, 5091 events. 3243/5091 cut-off events. For 1238385/1238387 co-relation queries the response was YES. Maximal size of possible extension queue 316. Compared 29646 event pairs, 801 based on Foata normal form. 1/5081 useless extension candidates. Maximal degree in co-relation 58536. Up to 4651 conditions per place. [2024-06-27 20:30:49,025 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 412 selfloop transitions, 70 changer transitions 0/487 dead transitions. [2024-06-27 20:30:49,025 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 354 places, 487 transitions, 7346 flow [2024-06-27 20:30:49,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:30:49,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:30:49,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 166 transitions. [2024-06-27 20:30:49,026 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43915343915343913 [2024-06-27 20:30:49,026 INFO L175 Difference]: Start difference. First operand has 346 places, 462 transitions, 5808 flow. Second operand 9 states and 166 transitions. [2024-06-27 20:30:49,026 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 354 places, 487 transitions, 7346 flow [2024-06-27 20:30:52,203 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 349 places, 487 transitions, 7101 flow, removed 55 selfloop flow, removed 5 redundant places. [2024-06-27 20:30:52,208 INFO L231 Difference]: Finished difference. Result has 350 places, 468 transitions, 6007 flow [2024-06-27 20:30:52,209 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5563, PETRI_DIFFERENCE_MINUEND_PLACES=341, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=462, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=395, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6007, PETRI_PLACES=350, PETRI_TRANSITIONS=468} [2024-06-27 20:30:52,209 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 307 predicate places. [2024-06-27 20:30:52,209 INFO L495 AbstractCegarLoop]: Abstraction has has 350 places, 468 transitions, 6007 flow [2024-06-27 20:30:52,209 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:30:52,209 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:30:52,209 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:30:52,209 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119 [2024-06-27 20:30:52,210 INFO L420 AbstractCegarLoop]: === Iteration 121 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:30:52,210 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:30:52,210 INFO L85 PathProgramCache]: Analyzing trace with hash 81825884, now seen corresponding path program 4 times [2024-06-27 20:30:52,210 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:30:52,210 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2072891138] [2024-06-27 20:30:52,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:30:52,210 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:30:52,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:30:53,189 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:30:53,189 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:30:53,190 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2072891138] [2024-06-27 20:30:53,190 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2072891138] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:30:53,190 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:30:53,190 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:30:53,190 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1642139518] [2024-06-27 20:30:53,190 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:30:53,190 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:30:53,190 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:30:53,190 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:30:53,190 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:30:53,290 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-27 20:30:53,290 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 350 places, 468 transitions, 6007 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:30:53,290 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:30:53,290 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-27 20:30:53,290 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:30:54,495 INFO L124 PetriNetUnfolderBase]: 3248/5098 cut-off events. [2024-06-27 20:30:54,496 INFO L125 PetriNetUnfolderBase]: For 1262773/1262775 co-relation queries the response was YES. [2024-06-27 20:30:54,554 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59221 conditions, 5098 events. 3248/5098 cut-off events. For 1262773/1262775 co-relation queries the response was YES. Maximal size of possible extension queue 317. Compared 29678 event pairs, 801 based on Foata normal form. 1/5088 useless extension candidates. Maximal degree in co-relation 59055. Up to 4657 conditions per place. [2024-06-27 20:30:54,580 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 415 selfloop transitions, 70 changer transitions 0/490 dead transitions. [2024-06-27 20:30:54,580 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 358 places, 490 transitions, 7413 flow [2024-06-27 20:30:54,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:30:54,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:30:54,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 166 transitions. [2024-06-27 20:30:54,581 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43915343915343913 [2024-06-27 20:30:54,581 INFO L175 Difference]: Start difference. First operand has 350 places, 468 transitions, 6007 flow. Second operand 9 states and 166 transitions. [2024-06-27 20:30:54,582 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 358 places, 490 transitions, 7413 flow [2024-06-27 20:30:58,052 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 352 places, 490 transitions, 7092 flow, removed 115 selfloop flow, removed 6 redundant places. [2024-06-27 20:30:58,057 INFO L231 Difference]: Finished difference. Result has 353 places, 471 transitions, 5984 flow [2024-06-27 20:30:58,057 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5730, PETRI_DIFFERENCE_MINUEND_PLACES=344, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=468, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=401, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5984, PETRI_PLACES=353, PETRI_TRANSITIONS=471} [2024-06-27 20:30:58,057 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 310 predicate places. [2024-06-27 20:30:58,058 INFO L495 AbstractCegarLoop]: Abstraction has has 353 places, 471 transitions, 5984 flow [2024-06-27 20:30:58,058 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:30:58,058 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:30:58,058 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:30:58,058 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120 [2024-06-27 20:30:58,058 INFO L420 AbstractCegarLoop]: === Iteration 122 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:30:58,058 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:30:58,059 INFO L85 PathProgramCache]: Analyzing trace with hash -122290516, now seen corresponding path program 5 times [2024-06-27 20:30:58,059 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:30:58,059 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2012350377] [2024-06-27 20:30:58,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:30:58,059 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:30:58,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:30:58,983 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:30:58,983 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:30:58,984 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2012350377] [2024-06-27 20:30:58,984 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2012350377] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:30:58,984 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:30:58,984 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:30:58,984 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [556188686] [2024-06-27 20:30:58,984 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:30:58,984 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:30:58,985 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:30:58,985 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:30:58,985 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:30:59,076 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-27 20:30:59,076 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 353 places, 471 transitions, 5984 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:30:59,076 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:30:59,076 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-27 20:30:59,076 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:31:00,438 INFO L124 PetriNetUnfolderBase]: 3245/5094 cut-off events. [2024-06-27 20:31:00,438 INFO L125 PetriNetUnfolderBase]: For 1269092/1269094 co-relation queries the response was YES. [2024-06-27 20:31:00,497 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58970 conditions, 5094 events. 3245/5094 cut-off events. For 1269092/1269094 co-relation queries the response was YES. Maximal size of possible extension queue 317. Compared 29643 event pairs, 801 based on Foata normal form. 1/5084 useless extension candidates. Maximal degree in co-relation 58803. Up to 4687 conditions per place. [2024-06-27 20:31:00,520 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 442 selfloop transitions, 45 changer transitions 0/492 dead transitions. [2024-06-27 20:31:00,521 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 361 places, 492 transitions, 7010 flow [2024-06-27 20:31:00,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:31:00,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:31:00,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 164 transitions. [2024-06-27 20:31:00,522 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43386243386243384 [2024-06-27 20:31:00,522 INFO L175 Difference]: Start difference. First operand has 353 places, 471 transitions, 5984 flow. Second operand 9 states and 164 transitions. [2024-06-27 20:31:00,522 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 361 places, 492 transitions, 7010 flow [2024-06-27 20:31:04,161 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 355 places, 492 transitions, 6724 flow, removed 88 selfloop flow, removed 6 redundant places. [2024-06-27 20:31:04,167 INFO L231 Difference]: Finished difference. Result has 356 places, 471 transitions, 5794 flow [2024-06-27 20:31:04,167 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5698, PETRI_DIFFERENCE_MINUEND_PLACES=347, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=471, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=426, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5794, PETRI_PLACES=356, PETRI_TRANSITIONS=471} [2024-06-27 20:31:04,167 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 313 predicate places. [2024-06-27 20:31:04,167 INFO L495 AbstractCegarLoop]: Abstraction has has 356 places, 471 transitions, 5794 flow [2024-06-27 20:31:04,167 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:31:04,168 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:31:04,168 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:31:04,168 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121 [2024-06-27 20:31:04,168 INFO L420 AbstractCegarLoop]: === Iteration 123 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:31:04,168 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:31:04,168 INFO L85 PathProgramCache]: Analyzing trace with hash -1189144482, now seen corresponding path program 6 times [2024-06-27 20:31:04,168 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:31:04,169 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1037615577] [2024-06-27 20:31:04,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:31:04,169 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:31:04,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:31:05,166 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:31:05,166 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:31:05,166 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1037615577] [2024-06-27 20:31:05,166 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1037615577] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:31:05,166 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:31:05,166 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:31:05,167 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1873638786] [2024-06-27 20:31:05,167 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:31:05,167 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:31:05,167 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:31:05,167 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:31:05,167 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:31:05,298 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-27 20:31:05,299 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 356 places, 471 transitions, 5794 flow. Second operand has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:31:05,299 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:31:05,299 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-27 20:31:05,299 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:31:06,576 INFO L124 PetriNetUnfolderBase]: 3065/4948 cut-off events. [2024-06-27 20:31:06,576 INFO L125 PetriNetUnfolderBase]: For 1287083/1287091 co-relation queries the response was YES. [2024-06-27 20:31:06,631 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57301 conditions, 4948 events. 3065/4948 cut-off events. For 1287083/1287091 co-relation queries the response was YES. Maximal size of possible extension queue 320. Compared 30186 event pairs, 745 based on Foata normal form. 7/4887 useless extension candidates. Maximal degree in co-relation 57133. Up to 4065 conditions per place. [2024-06-27 20:31:06,654 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 342 selfloop transitions, 102 changer transitions 0/487 dead transitions. [2024-06-27 20:31:06,655 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 362 places, 487 transitions, 6896 flow [2024-06-27 20:31:06,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 20:31:06,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 20:31:06,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 138 transitions. [2024-06-27 20:31:06,656 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46938775510204084 [2024-06-27 20:31:06,656 INFO L175 Difference]: Start difference. First operand has 356 places, 471 transitions, 5794 flow. Second operand 7 states and 138 transitions. [2024-06-27 20:31:06,656 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 362 places, 487 transitions, 6896 flow [2024-06-27 20:31:10,084 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 353 places, 487 transitions, 6747 flow, removed 8 selfloop flow, removed 9 redundant places. [2024-06-27 20:31:10,090 INFO L231 Difference]: Finished difference. Result has 354 places, 474 transitions, 6017 flow [2024-06-27 20:31:10,090 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5645, PETRI_DIFFERENCE_MINUEND_PLACES=347, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=471, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=99, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=369, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6017, PETRI_PLACES=354, PETRI_TRANSITIONS=474} [2024-06-27 20:31:10,090 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 311 predicate places. [2024-06-27 20:31:10,090 INFO L495 AbstractCegarLoop]: Abstraction has has 354 places, 474 transitions, 6017 flow [2024-06-27 20:31:10,090 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:31:10,090 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:31:10,091 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:31:10,091 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122 [2024-06-27 20:31:10,091 INFO L420 AbstractCegarLoop]: === Iteration 124 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:31:10,091 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:31:10,091 INFO L85 PathProgramCache]: Analyzing trace with hash -388135535, now seen corresponding path program 5 times [2024-06-27 20:31:10,091 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:31:10,091 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1137380119] [2024-06-27 20:31:10,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:31:10,092 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:31:10,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:31:10,793 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:31:10,793 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:31:10,794 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1137380119] [2024-06-27 20:31:10,794 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1137380119] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:31:10,794 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:31:10,794 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:31:10,794 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2113341832] [2024-06-27 20:31:10,794 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:31:10,794 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:31:10,794 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:31:10,794 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:31:10,794 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:31:10,863 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-27 20:31:10,863 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 354 places, 474 transitions, 6017 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:31:10,863 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:31:10,863 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-27 20:31:10,864 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:31:12,024 INFO L124 PetriNetUnfolderBase]: 3228/5072 cut-off events. [2024-06-27 20:31:12,025 INFO L125 PetriNetUnfolderBase]: For 1295783/1295785 co-relation queries the response was YES. [2024-06-27 20:31:12,081 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58989 conditions, 5072 events. 3228/5072 cut-off events. For 1295783/1295785 co-relation queries the response was YES. Maximal size of possible extension queue 318. Compared 29546 event pairs, 784 based on Foata normal form. 2/5067 useless extension candidates. Maximal degree in co-relation 58820. Up to 4724 conditions per place. [2024-06-27 20:31:12,105 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 461 selfloop transitions, 29 changer transitions 0/495 dead transitions. [2024-06-27 20:31:12,106 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 362 places, 495 transitions, 7083 flow [2024-06-27 20:31:12,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:31:12,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:31:12,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 161 transitions. [2024-06-27 20:31:12,108 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42592592592592593 [2024-06-27 20:31:12,108 INFO L175 Difference]: Start difference. First operand has 354 places, 474 transitions, 6017 flow. Second operand 9 states and 161 transitions. [2024-06-27 20:31:12,108 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 362 places, 495 transitions, 7083 flow [2024-06-27 20:31:16,126 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 357 places, 495 transitions, 6727 flow, removed 82 selfloop flow, removed 5 redundant places. [2024-06-27 20:31:16,132 INFO L231 Difference]: Finished difference. Result has 358 places, 474 transitions, 5725 flow [2024-06-27 20:31:16,133 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5661, PETRI_DIFFERENCE_MINUEND_PLACES=349, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=474, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=445, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5725, PETRI_PLACES=358, PETRI_TRANSITIONS=474} [2024-06-27 20:31:16,133 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 315 predicate places. [2024-06-27 20:31:16,133 INFO L495 AbstractCegarLoop]: Abstraction has has 358 places, 474 transitions, 5725 flow [2024-06-27 20:31:16,133 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:31:16,133 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:31:16,133 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:31:16,133 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123 [2024-06-27 20:31:16,134 INFO L420 AbstractCegarLoop]: === Iteration 125 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:31:16,134 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:31:16,134 INFO L85 PathProgramCache]: Analyzing trace with hash -1214258641, now seen corresponding path program 6 times [2024-06-27 20:31:16,134 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:31:16,135 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2026010603] [2024-06-27 20:31:16,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:31:16,135 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:31:16,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:31:16,838 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:31:16,838 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:31:16,838 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2026010603] [2024-06-27 20:31:16,839 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2026010603] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:31:16,839 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:31:16,839 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:31:16,839 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2071224325] [2024-06-27 20:31:16,839 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:31:16,839 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:31:16,840 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:31:16,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:31:16,840 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:31:16,911 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-27 20:31:16,911 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 358 places, 474 transitions, 5725 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:31:16,911 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:31:16,911 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-27 20:31:16,911 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:31:18,109 INFO L124 PetriNetUnfolderBase]: 3270/5150 cut-off events. [2024-06-27 20:31:18,110 INFO L125 PetriNetUnfolderBase]: For 1346501/1346503 co-relation queries the response was YES. [2024-06-27 20:31:18,171 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59966 conditions, 5150 events. 3270/5150 cut-off events. For 1346501/1346503 co-relation queries the response was YES. Maximal size of possible extension queue 323. Compared 30252 event pairs, 755 based on Foata normal form. 2/5145 useless extension candidates. Maximal degree in co-relation 59796. Up to 4662 conditions per place. [2024-06-27 20:31:18,198 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 438 selfloop transitions, 61 changer transitions 0/504 dead transitions. [2024-06-27 20:31:18,198 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 366 places, 504 transitions, 7350 flow [2024-06-27 20:31:18,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:31:18,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:31:18,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 166 transitions. [2024-06-27 20:31:18,199 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43915343915343913 [2024-06-27 20:31:18,199 INFO L175 Difference]: Start difference. First operand has 358 places, 474 transitions, 5725 flow. Second operand 9 states and 166 transitions. [2024-06-27 20:31:18,199 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 366 places, 504 transitions, 7350 flow [2024-06-27 20:31:22,185 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 353 places, 504 transitions, 6982 flow, removed 10 selfloop flow, removed 13 redundant places. [2024-06-27 20:31:22,190 INFO L231 Difference]: Finished difference. Result has 356 places, 484 transitions, 5835 flow [2024-06-27 20:31:22,191 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5357, PETRI_DIFFERENCE_MINUEND_PLACES=345, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=474, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=413, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5835, PETRI_PLACES=356, PETRI_TRANSITIONS=484} [2024-06-27 20:31:22,191 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 313 predicate places. [2024-06-27 20:31:22,191 INFO L495 AbstractCegarLoop]: Abstraction has has 356 places, 484 transitions, 5835 flow [2024-06-27 20:31:22,191 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:31:22,191 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:31:22,192 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:31:22,192 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable124 [2024-06-27 20:31:22,192 INFO L420 AbstractCegarLoop]: === Iteration 126 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:31:22,192 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:31:22,192 INFO L85 PathProgramCache]: Analyzing trace with hash -1201371631, now seen corresponding path program 7 times [2024-06-27 20:31:22,192 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:31:22,192 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [400274635] [2024-06-27 20:31:22,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:31:22,193 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:31:22,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:31:22,953 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:31:22,953 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:31:22,953 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [400274635] [2024-06-27 20:31:22,953 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [400274635] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:31:22,953 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:31:22,953 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:31:22,953 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [355731018] [2024-06-27 20:31:22,953 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:31:22,954 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:31:22,954 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:31:22,954 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:31:22,954 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:31:23,058 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-27 20:31:23,059 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 356 places, 484 transitions, 5835 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:31:23,059 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:31:23,059 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-27 20:31:23,059 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:31:24,215 INFO L124 PetriNetUnfolderBase]: 3264/5150 cut-off events. [2024-06-27 20:31:24,215 INFO L125 PetriNetUnfolderBase]: For 1348716/1348718 co-relation queries the response was YES. [2024-06-27 20:31:24,278 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59858 conditions, 5150 events. 3264/5150 cut-off events. For 1348716/1348718 co-relation queries the response was YES. Maximal size of possible extension queue 326. Compared 30352 event pairs, 752 based on Foata normal form. 2/5145 useless extension candidates. Maximal degree in co-relation 59685. Up to 4657 conditions per place. [2024-06-27 20:31:24,306 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 436 selfloop transitions, 63 changer transitions 0/504 dead transitions. [2024-06-27 20:31:24,306 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 364 places, 504 transitions, 7175 flow [2024-06-27 20:31:24,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:31:24,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:31:24,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 166 transitions. [2024-06-27 20:31:24,307 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43915343915343913 [2024-06-27 20:31:24,307 INFO L175 Difference]: Start difference. First operand has 356 places, 484 transitions, 5835 flow. Second operand 9 states and 166 transitions. [2024-06-27 20:31:24,308 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 364 places, 504 transitions, 7175 flow [2024-06-27 20:31:28,230 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 359 places, 504 transitions, 7018 flow, removed 41 selfloop flow, removed 5 redundant places. [2024-06-27 20:31:28,235 INFO L231 Difference]: Finished difference. Result has 360 places, 484 transitions, 5810 flow [2024-06-27 20:31:28,235 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5678, PETRI_DIFFERENCE_MINUEND_PLACES=351, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=484, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=421, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5810, PETRI_PLACES=360, PETRI_TRANSITIONS=484} [2024-06-27 20:31:28,235 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 317 predicate places. [2024-06-27 20:31:28,235 INFO L495 AbstractCegarLoop]: Abstraction has has 360 places, 484 transitions, 5810 flow [2024-06-27 20:31:28,236 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:31:28,236 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:31:28,236 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:31:28,236 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable125 [2024-06-27 20:31:28,236 INFO L420 AbstractCegarLoop]: === Iteration 127 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:31:28,236 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:31:28,236 INFO L85 PathProgramCache]: Analyzing trace with hash -1904098509, now seen corresponding path program 8 times [2024-06-27 20:31:28,236 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:31:28,237 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1487011712] [2024-06-27 20:31:28,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:31:28,237 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:31:28,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:31:28,881 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:31:28,881 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:31:28,881 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1487011712] [2024-06-27 20:31:28,882 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1487011712] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:31:28,882 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:31:28,882 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:31:28,882 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [131446872] [2024-06-27 20:31:28,882 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:31:28,882 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:31:28,882 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:31:28,882 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:31:28,883 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:31:28,974 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-27 20:31:28,974 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 360 places, 484 transitions, 5810 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:31:28,974 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:31:28,974 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-27 20:31:28,975 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:31:30,139 INFO L124 PetriNetUnfolderBase]: 3258/5140 cut-off events. [2024-06-27 20:31:30,139 INFO L125 PetriNetUnfolderBase]: For 1351694/1351696 co-relation queries the response was YES. [2024-06-27 20:31:30,198 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59580 conditions, 5140 events. 3258/5140 cut-off events. For 1351694/1351696 co-relation queries the response was YES. Maximal size of possible extension queue 325. Compared 30286 event pairs, 743 based on Foata normal form. 2/5135 useless extension candidates. Maximal degree in co-relation 59406. Up to 4652 conditions per place. [2024-06-27 20:31:30,223 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 432 selfloop transitions, 66 changer transitions 0/503 dead transitions. [2024-06-27 20:31:30,223 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 368 places, 503 transitions, 6898 flow [2024-06-27 20:31:30,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:31:30,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:31:30,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 165 transitions. [2024-06-27 20:31:30,237 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4365079365079365 [2024-06-27 20:31:30,237 INFO L175 Difference]: Start difference. First operand has 360 places, 484 transitions, 5810 flow. Second operand 9 states and 165 transitions. [2024-06-27 20:31:30,237 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 368 places, 503 transitions, 6898 flow [2024-06-27 20:31:34,687 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 362 places, 503 transitions, 6680 flow, removed 58 selfloop flow, removed 6 redundant places. [2024-06-27 20:31:34,692 INFO L231 Difference]: Finished difference. Result has 363 places, 484 transitions, 5730 flow [2024-06-27 20:31:34,693 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5592, PETRI_DIFFERENCE_MINUEND_PLACES=354, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=484, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=418, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5730, PETRI_PLACES=363, PETRI_TRANSITIONS=484} [2024-06-27 20:31:34,693 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 320 predicate places. [2024-06-27 20:31:34,693 INFO L495 AbstractCegarLoop]: Abstraction has has 363 places, 484 transitions, 5730 flow [2024-06-27 20:31:34,693 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:31:34,693 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:31:34,694 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:31:34,694 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126 [2024-06-27 20:31:34,694 INFO L420 AbstractCegarLoop]: === Iteration 128 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:31:34,694 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:31:34,695 INFO L85 PathProgramCache]: Analyzing trace with hash -1514918959, now seen corresponding path program 9 times [2024-06-27 20:31:34,696 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:31:34,696 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [455734228] [2024-06-27 20:31:34,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:31:34,700 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:31:34,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:31:35,400 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:31:35,400 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:31:35,401 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [455734228] [2024-06-27 20:31:35,401 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [455734228] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:31:35,401 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:31:35,401 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:31:35,401 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [851581346] [2024-06-27 20:31:35,401 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:31:35,401 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:31:35,402 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:31:35,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:31:35,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:31:35,484 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-27 20:31:35,484 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 363 places, 484 transitions, 5730 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:31:35,484 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:31:35,484 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-27 20:31:35,484 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:31:36,805 INFO L124 PetriNetUnfolderBase]: 3310/5238 cut-off events. [2024-06-27 20:31:36,805 INFO L125 PetriNetUnfolderBase]: For 1421612/1421617 co-relation queries the response was YES. [2024-06-27 20:31:36,861 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60907 conditions, 5238 events. 3310/5238 cut-off events. For 1421612/1421617 co-relation queries the response was YES. Maximal size of possible extension queue 325. Compared 31041 event pairs, 724 based on Foata normal form. 6/5236 useless extension candidates. Maximal degree in co-relation 60732. Up to 4028 conditions per place. [2024-06-27 20:31:36,884 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 337 selfloop transitions, 170 changer transitions 0/512 dead transitions. [2024-06-27 20:31:36,884 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 371 places, 512 transitions, 7838 flow [2024-06-27 20:31:36,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:31:36,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:31:36,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 173 transitions. [2024-06-27 20:31:36,886 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4576719576719577 [2024-06-27 20:31:36,886 INFO L175 Difference]: Start difference. First operand has 363 places, 484 transitions, 5730 flow. Second operand 9 states and 173 transitions. [2024-06-27 20:31:36,886 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 371 places, 512 transitions, 7838 flow [2024-06-27 20:31:40,874 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 364 places, 512 transitions, 7723 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-06-27 20:31:40,880 INFO L231 Difference]: Finished difference. Result has 365 places, 492 transitions, 6198 flow [2024-06-27 20:31:40,880 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5615, PETRI_DIFFERENCE_MINUEND_PLACES=356, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=484, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=163, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=321, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6198, PETRI_PLACES=365, PETRI_TRANSITIONS=492} [2024-06-27 20:31:40,880 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 322 predicate places. [2024-06-27 20:31:40,881 INFO L495 AbstractCegarLoop]: Abstraction has has 365 places, 492 transitions, 6198 flow [2024-06-27 20:31:40,881 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:31:40,881 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:31:40,881 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:31:40,881 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127 [2024-06-27 20:31:40,881 INFO L420 AbstractCegarLoop]: === Iteration 129 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:31:40,881 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:31:40,882 INFO L85 PathProgramCache]: Analyzing trace with hash -1514652049, now seen corresponding path program 10 times [2024-06-27 20:31:40,882 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:31:40,882 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [872864652] [2024-06-27 20:31:40,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:31:40,882 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:31:40,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:31:41,604 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:31:41,605 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:31:41,605 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [872864652] [2024-06-27 20:31:41,605 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [872864652] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:31:41,605 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:31:41,605 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:31:41,605 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1874155180] [2024-06-27 20:31:41,605 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:31:41,606 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:31:41,606 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:31:41,606 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:31:41,606 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:31:41,675 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-27 20:31:41,675 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 365 places, 492 transitions, 6198 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:31:41,675 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:31:41,675 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-27 20:31:41,675 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:31:42,869 INFO L124 PetriNetUnfolderBase]: 3298/5224 cut-off events. [2024-06-27 20:31:42,869 INFO L125 PetriNetUnfolderBase]: For 1412021/1412026 co-relation queries the response was YES. [2024-06-27 20:31:42,932 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60906 conditions, 5224 events. 3298/5224 cut-off events. For 1412021/1412026 co-relation queries the response was YES. Maximal size of possible extension queue 325. Compared 30992 event pairs, 724 based on Foata normal form. 6/5222 useless extension candidates. Maximal degree in co-relation 60730. Up to 4020 conditions per place. [2024-06-27 20:31:42,958 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 335 selfloop transitions, 171 changer transitions 0/511 dead transitions. [2024-06-27 20:31:42,959 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 373 places, 511 transitions, 7820 flow [2024-06-27 20:31:42,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:31:42,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:31:42,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 171 transitions. [2024-06-27 20:31:42,960 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4523809523809524 [2024-06-27 20:31:42,960 INFO L175 Difference]: Start difference. First operand has 365 places, 492 transitions, 6198 flow. Second operand 9 states and 171 transitions. [2024-06-27 20:31:42,960 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 373 places, 511 transitions, 7820 flow [2024-06-27 20:31:47,339 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 368 places, 511 transitions, 7382 flow, removed 78 selfloop flow, removed 5 redundant places. [2024-06-27 20:31:47,345 INFO L231 Difference]: Finished difference. Result has 369 places, 492 transitions, 6112 flow [2024-06-27 20:31:47,345 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5760, PETRI_DIFFERENCE_MINUEND_PLACES=360, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=492, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=171, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=321, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6112, PETRI_PLACES=369, PETRI_TRANSITIONS=492} [2024-06-27 20:31:47,345 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 326 predicate places. [2024-06-27 20:31:47,345 INFO L495 AbstractCegarLoop]: Abstraction has has 369 places, 492 transitions, 6112 flow [2024-06-27 20:31:47,345 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:31:47,346 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:31:47,346 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:31:47,346 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable128 [2024-06-27 20:31:47,346 INFO L420 AbstractCegarLoop]: === Iteration 130 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:31:47,346 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:31:47,346 INFO L85 PathProgramCache]: Analyzing trace with hash -175911407, now seen corresponding path program 11 times [2024-06-27 20:31:47,347 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:31:47,347 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2001571421] [2024-06-27 20:31:47,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:31:47,347 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:31:47,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:31:48,006 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:31:48,006 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:31:48,006 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2001571421] [2024-06-27 20:31:48,006 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2001571421] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:31:48,006 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:31:48,006 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:31:48,007 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [99972217] [2024-06-27 20:31:48,007 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:31:48,007 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:31:48,007 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:31:48,007 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:31:48,007 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:31:48,094 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-27 20:31:48,094 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 369 places, 492 transitions, 6112 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:31:48,094 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:31:48,094 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-27 20:31:48,094 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:31:49,250 INFO L124 PetriNetUnfolderBase]: 3356/5322 cut-off events. [2024-06-27 20:31:49,250 INFO L125 PetriNetUnfolderBase]: For 1467069/1467074 co-relation queries the response was YES. [2024-06-27 20:31:49,311 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62609 conditions, 5322 events. 3356/5322 cut-off events. For 1467069/1467074 co-relation queries the response was YES. Maximal size of possible extension queue 336. Compared 31839 event pairs, 745 based on Foata normal form. 4/5318 useless extension candidates. Maximal degree in co-relation 62432. Up to 4053 conditions per place. [2024-06-27 20:31:49,336 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 314 selfloop transitions, 206 changer transitions 0/525 dead transitions. [2024-06-27 20:31:49,337 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 377 places, 525 transitions, 8441 flow [2024-06-27 20:31:49,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:31:49,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:31:49,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 169 transitions. [2024-06-27 20:31:49,338 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4470899470899471 [2024-06-27 20:31:49,338 INFO L175 Difference]: Start difference. First operand has 369 places, 492 transitions, 6112 flow. Second operand 9 states and 169 transitions. [2024-06-27 20:31:49,338 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 377 places, 525 transitions, 8441 flow [2024-06-27 20:31:53,683 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 370 places, 525 transitions, 8104 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-06-27 20:31:53,688 INFO L231 Difference]: Finished difference. Result has 371 places, 505 transitions, 6614 flow [2024-06-27 20:31:53,688 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5793, PETRI_DIFFERENCE_MINUEND_PLACES=362, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=492, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=195, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=297, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6614, PETRI_PLACES=371, PETRI_TRANSITIONS=505} [2024-06-27 20:31:53,689 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 328 predicate places. [2024-06-27 20:31:53,689 INFO L495 AbstractCegarLoop]: Abstraction has has 371 places, 505 transitions, 6614 flow [2024-06-27 20:31:53,689 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:31:53,689 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:31:53,689 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:31:53,689 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable129 [2024-06-27 20:31:53,689 INFO L420 AbstractCegarLoop]: === Iteration 131 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:31:53,690 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:31:53,690 INFO L85 PathProgramCache]: Analyzing trace with hash -723824619, now seen corresponding path program 12 times [2024-06-27 20:31:53,690 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:31:53,690 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [199008981] [2024-06-27 20:31:53,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:31:53,690 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:31:53,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:31:54,362 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:31:54,362 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:31:54,363 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [199008981] [2024-06-27 20:31:54,363 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [199008981] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:31:54,363 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:31:54,363 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:31:54,363 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [808299371] [2024-06-27 20:31:54,363 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:31:54,363 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:31:54,363 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:31:54,364 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:31:54,364 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:31:54,447 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-27 20:31:54,448 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 371 places, 505 transitions, 6614 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:31:54,448 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:31:54,448 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-27 20:31:54,448 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:31:55,692 INFO L124 PetriNetUnfolderBase]: 3398/5384 cut-off events. [2024-06-27 20:31:55,692 INFO L125 PetriNetUnfolderBase]: For 1524923/1524928 co-relation queries the response was YES. [2024-06-27 20:31:55,754 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64106 conditions, 5384 events. 3398/5384 cut-off events. For 1524923/1524928 co-relation queries the response was YES. Maximal size of possible extension queue 342. Compared 32228 event pairs, 724 based on Foata normal form. 4/5380 useless extension candidates. Maximal degree in co-relation 63928. Up to 4083 conditions per place. [2024-06-27 20:31:55,779 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 312 selfloop transitions, 216 changer transitions 0/533 dead transitions. [2024-06-27 20:31:55,779 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 379 places, 533 transitions, 8789 flow [2024-06-27 20:31:55,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:31:55,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:31:55,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 170 transitions. [2024-06-27 20:31:55,780 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4497354497354497 [2024-06-27 20:31:55,780 INFO L175 Difference]: Start difference. First operand has 371 places, 505 transitions, 6614 flow. Second operand 9 states and 170 transitions. [2024-06-27 20:31:55,780 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 379 places, 533 transitions, 8789 flow [2024-06-27 20:32:00,531 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 375 places, 533 transitions, 8449 flow, removed 69 selfloop flow, removed 4 redundant places. [2024-06-27 20:32:00,537 INFO L231 Difference]: Finished difference. Result has 376 places, 513 transitions, 6953 flow [2024-06-27 20:32:00,537 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6308, PETRI_DIFFERENCE_MINUEND_PLACES=367, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=505, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=208, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=297, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6953, PETRI_PLACES=376, PETRI_TRANSITIONS=513} [2024-06-27 20:32:00,537 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 333 predicate places. [2024-06-27 20:32:00,538 INFO L495 AbstractCegarLoop]: Abstraction has has 376 places, 513 transitions, 6953 flow [2024-06-27 20:32:00,538 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:32:00,538 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:32:00,538 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:32:00,538 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130 [2024-06-27 20:32:00,538 INFO L420 AbstractCegarLoop]: === Iteration 132 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:32:00,539 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:32:00,539 INFO L85 PathProgramCache]: Analyzing trace with hash -408267981, now seen corresponding path program 13 times [2024-06-27 20:32:00,539 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:32:00,539 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1900796404] [2024-06-27 20:32:00,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:32:00,539 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:32:00,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:32:01,254 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:32:01,255 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:32:01,255 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1900796404] [2024-06-27 20:32:01,255 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1900796404] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:32:01,255 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:32:01,255 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:32:01,255 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [573236784] [2024-06-27 20:32:01,255 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:32:01,255 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:32:01,256 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:32:01,256 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:32:01,256 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:32:01,323 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-27 20:32:01,324 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 376 places, 513 transitions, 6953 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:32:01,324 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:32:01,324 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-27 20:32:01,324 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:32:02,540 INFO L124 PetriNetUnfolderBase]: 3402/5372 cut-off events. [2024-06-27 20:32:02,540 INFO L125 PetriNetUnfolderBase]: For 1546439/1546444 co-relation queries the response was YES. [2024-06-27 20:32:02,601 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64012 conditions, 5372 events. 3402/5372 cut-off events. For 1546439/1546444 co-relation queries the response was YES. Maximal size of possible extension queue 341. Compared 31945 event pairs, 746 based on Foata normal form. 6/5370 useless extension candidates. Maximal degree in co-relation 63833. Up to 4084 conditions per place. [2024-06-27 20:32:02,626 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 331 selfloop transitions, 199 changer transitions 0/535 dead transitions. [2024-06-27 20:32:02,626 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 384 places, 535 transitions, 8746 flow [2024-06-27 20:32:02,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:32:02,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:32:02,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 171 transitions. [2024-06-27 20:32:02,627 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4523809523809524 [2024-06-27 20:32:02,627 INFO L175 Difference]: Start difference. First operand has 376 places, 513 transitions, 6953 flow. Second operand 9 states and 171 transitions. [2024-06-27 20:32:02,627 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 384 places, 535 transitions, 8746 flow [2024-06-27 20:32:07,132 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 379 places, 535 transitions, 8342 flow, removed 29 selfloop flow, removed 5 redundant places. [2024-06-27 20:32:07,139 INFO L231 Difference]: Finished difference. Result has 380 places, 516 transitions, 7067 flow [2024-06-27 20:32:07,139 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6553, PETRI_DIFFERENCE_MINUEND_PLACES=371, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=513, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=196, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=316, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7067, PETRI_PLACES=380, PETRI_TRANSITIONS=516} [2024-06-27 20:32:07,139 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 337 predicate places. [2024-06-27 20:32:07,139 INFO L495 AbstractCegarLoop]: Abstraction has has 380 places, 516 transitions, 7067 flow [2024-06-27 20:32:07,140 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:32:07,140 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:32:07,140 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:32:07,140 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131 [2024-06-27 20:32:07,140 INFO L420 AbstractCegarLoop]: === Iteration 133 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:32:07,140 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:32:07,140 INFO L85 PathProgramCache]: Analyzing trace with hash 787841843, now seen corresponding path program 14 times [2024-06-27 20:32:07,141 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:32:07,141 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [839337264] [2024-06-27 20:32:07,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:32:07,141 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:32:07,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:32:07,908 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:32:07,908 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:32:07,908 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [839337264] [2024-06-27 20:32:07,909 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [839337264] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:32:07,909 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:32:07,909 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:32:07,909 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [826542757] [2024-06-27 20:32:07,909 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:32:07,909 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:32:07,909 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:32:07,910 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:32:07,910 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:32:07,980 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-27 20:32:07,980 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 380 places, 516 transitions, 7067 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:32:07,981 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:32:07,981 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-27 20:32:07,981 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:32:09,208 INFO L124 PetriNetUnfolderBase]: 3392/5358 cut-off events. [2024-06-27 20:32:09,209 INFO L125 PetriNetUnfolderBase]: For 1534091/1534096 co-relation queries the response was YES. [2024-06-27 20:32:09,276 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63714 conditions, 5358 events. 3392/5358 cut-off events. For 1534091/1534096 co-relation queries the response was YES. Maximal size of possible extension queue 341. Compared 31892 event pairs, 756 based on Foata normal form. 4/5354 useless extension candidates. Maximal degree in co-relation 63534. Up to 4076 conditions per place. [2024-06-27 20:32:09,303 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 307 selfloop transitions, 223 changer transitions 0/535 dead transitions. [2024-06-27 20:32:09,304 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 388 places, 535 transitions, 8753 flow [2024-06-27 20:32:09,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:32:09,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:32:09,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 168 transitions. [2024-06-27 20:32:09,305 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4444444444444444 [2024-06-27 20:32:09,305 INFO L175 Difference]: Start difference. First operand has 380 places, 516 transitions, 7067 flow. Second operand 9 states and 168 transitions. [2024-06-27 20:32:09,305 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 388 places, 535 transitions, 8753 flow [2024-06-27 20:32:13,740 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 383 places, 535 transitions, 8362 flow, removed 69 selfloop flow, removed 5 redundant places. [2024-06-27 20:32:13,746 INFO L231 Difference]: Finished difference. Result has 384 places, 516 transitions, 7128 flow [2024-06-27 20:32:13,746 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6676, PETRI_DIFFERENCE_MINUEND_PLACES=375, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=516, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=223, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=293, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7128, PETRI_PLACES=384, PETRI_TRANSITIONS=516} [2024-06-27 20:32:13,746 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 341 predicate places. [2024-06-27 20:32:13,746 INFO L495 AbstractCegarLoop]: Abstraction has has 384 places, 516 transitions, 7128 flow [2024-06-27 20:32:13,747 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:32:13,747 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:32:13,747 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:32:13,747 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132 [2024-06-27 20:32:13,747 INFO L420 AbstractCegarLoop]: === Iteration 134 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:32:13,747 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:32:13,747 INFO L85 PathProgramCache]: Analyzing trace with hash -901401609, now seen corresponding path program 15 times [2024-06-27 20:32:13,747 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:32:13,748 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1973260503] [2024-06-27 20:32:13,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:32:13,748 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:32:13,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:32:14,485 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:32:14,486 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:32:14,486 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1973260503] [2024-06-27 20:32:14,486 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1973260503] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:32:14,486 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:32:14,486 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:32:14,486 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [622129768] [2024-06-27 20:32:14,486 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:32:14,487 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:32:14,487 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:32:14,487 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:32:14,487 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:32:14,576 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-27 20:32:14,577 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 384 places, 516 transitions, 7128 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:32:14,577 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:32:14,577 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-27 20:32:14,577 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:32:15,837 INFO L124 PetriNetUnfolderBase]: 3380/5366 cut-off events. [2024-06-27 20:32:15,838 INFO L125 PetriNetUnfolderBase]: For 1537603/1537608 co-relation queries the response was YES. [2024-06-27 20:32:15,901 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63161 conditions, 5366 events. 3380/5366 cut-off events. For 1537603/1537608 co-relation queries the response was YES. Maximal size of possible extension queue 345. Compared 32237 event pairs, 732 based on Foata normal form. 6/5364 useless extension candidates. Maximal degree in co-relation 62980. Up to 4068 conditions per place. [2024-06-27 20:32:15,929 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 336 selfloop transitions, 194 changer transitions 0/535 dead transitions. [2024-06-27 20:32:15,929 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 392 places, 535 transitions, 8818 flow [2024-06-27 20:32:15,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:32:15,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:32:15,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 170 transitions. [2024-06-27 20:32:15,930 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4497354497354497 [2024-06-27 20:32:15,930 INFO L175 Difference]: Start difference. First operand has 384 places, 516 transitions, 7128 flow. Second operand 9 states and 170 transitions. [2024-06-27 20:32:15,930 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 392 places, 535 transitions, 8818 flow [2024-06-27 20:32:19,843 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 379 places, 535 transitions, 7998 flow, removed 57 selfloop flow, removed 13 redundant places. [2024-06-27 20:32:19,849 INFO L231 Difference]: Finished difference. Result has 380 places, 516 transitions, 6703 flow [2024-06-27 20:32:19,849 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6308, PETRI_DIFFERENCE_MINUEND_PLACES=371, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=516, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=194, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=322, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6703, PETRI_PLACES=380, PETRI_TRANSITIONS=516} [2024-06-27 20:32:19,850 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 337 predicate places. [2024-06-27 20:32:19,850 INFO L495 AbstractCegarLoop]: Abstraction has has 380 places, 516 transitions, 6703 flow [2024-06-27 20:32:19,850 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:32:19,850 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:32:19,850 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:32:19,850 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable133 [2024-06-27 20:32:19,850 INFO L420 AbstractCegarLoop]: === Iteration 135 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:32:19,851 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:32:19,851 INFO L85 PathProgramCache]: Analyzing trace with hash -467324109, now seen corresponding path program 16 times [2024-06-27 20:32:19,851 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:32:19,851 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1692392031] [2024-06-27 20:32:19,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:32:19,851 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:32:19,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:32:20,594 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:32:20,595 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:32:20,595 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1692392031] [2024-06-27 20:32:20,595 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1692392031] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:32:20,595 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:32:20,595 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:32:20,595 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1955643042] [2024-06-27 20:32:20,595 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:32:20,595 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:32:20,595 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:32:20,595 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:32:20,595 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:32:20,700 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-27 20:32:20,700 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 380 places, 516 transitions, 6703 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:32:20,700 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:32:20,700 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-27 20:32:20,700 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:32:22,065 INFO L124 PetriNetUnfolderBase]: 3374/5360 cut-off events. [2024-06-27 20:32:22,066 INFO L125 PetriNetUnfolderBase]: For 1518145/1518150 co-relation queries the response was YES. [2024-06-27 20:32:22,124 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62344 conditions, 5360 events. 3374/5360 cut-off events. For 1518145/1518150 co-relation queries the response was YES. Maximal size of possible extension queue 346. Compared 32270 event pairs, 694 based on Foata normal form. 4/5356 useless extension candidates. Maximal degree in co-relation 62164. Up to 4065 conditions per place. [2024-06-27 20:32:22,147 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 311 selfloop transitions, 219 changer transitions 0/535 dead transitions. [2024-06-27 20:32:22,147 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 388 places, 535 transitions, 8397 flow [2024-06-27 20:32:22,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:32:22,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:32:22,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 168 transitions. [2024-06-27 20:32:22,148 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4444444444444444 [2024-06-27 20:32:22,148 INFO L175 Difference]: Start difference. First operand has 380 places, 516 transitions, 6703 flow. Second operand 9 states and 168 transitions. [2024-06-27 20:32:22,148 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 388 places, 535 transitions, 8397 flow [2024-06-27 20:32:27,280 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 382 places, 535 transitions, 7979 flow, removed 29 selfloop flow, removed 6 redundant places. [2024-06-27 20:32:27,286 INFO L231 Difference]: Finished difference. Result has 383 places, 516 transitions, 6729 flow [2024-06-27 20:32:27,286 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6285, PETRI_DIFFERENCE_MINUEND_PLACES=374, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=516, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=219, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=297, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6729, PETRI_PLACES=383, PETRI_TRANSITIONS=516} [2024-06-27 20:32:27,287 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 340 predicate places. [2024-06-27 20:32:27,287 INFO L495 AbstractCegarLoop]: Abstraction has has 383 places, 516 transitions, 6729 flow [2024-06-27 20:32:27,287 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:32:27,287 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:32:27,287 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:32:27,287 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable134 [2024-06-27 20:32:27,287 INFO L420 AbstractCegarLoop]: === Iteration 136 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:32:27,288 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:32:27,288 INFO L85 PathProgramCache]: Analyzing trace with hash -473038029, now seen corresponding path program 17 times [2024-06-27 20:32:27,288 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:32:27,288 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1414235811] [2024-06-27 20:32:27,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:32:27,288 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:32:27,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:32:27,949 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:32:27,949 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:32:27,949 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1414235811] [2024-06-27 20:32:27,950 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1414235811] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:32:27,950 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:32:27,950 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:32:27,950 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2109980675] [2024-06-27 20:32:27,950 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:32:27,950 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:32:27,950 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:32:27,951 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:32:27,951 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:32:28,049 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-27 20:32:28,049 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 383 places, 516 transitions, 6729 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:32:28,049 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:32:28,049 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-27 20:32:28,049 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:32:29,344 INFO L124 PetriNetUnfolderBase]: 3362/5338 cut-off events. [2024-06-27 20:32:29,344 INFO L125 PetriNetUnfolderBase]: For 1518715/1518720 co-relation queries the response was YES. [2024-06-27 20:32:29,401 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61885 conditions, 5338 events. 3362/5338 cut-off events. For 1518715/1518720 co-relation queries the response was YES. Maximal size of possible extension queue 346. Compared 32047 event pairs, 688 based on Foata normal form. 6/5336 useless extension candidates. Maximal degree in co-relation 61704. Up to 4057 conditions per place. [2024-06-27 20:32:29,424 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 324 selfloop transitions, 206 changer transitions 0/535 dead transitions. [2024-06-27 20:32:29,424 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 391 places, 535 transitions, 8427 flow [2024-06-27 20:32:29,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:32:29,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:32:29,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 169 transitions. [2024-06-27 20:32:29,425 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4470899470899471 [2024-06-27 20:32:29,425 INFO L175 Difference]: Start difference. First operand has 383 places, 516 transitions, 6729 flow. Second operand 9 states and 169 transitions. [2024-06-27 20:32:29,426 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 391 places, 535 transitions, 8427 flow [2024-06-27 20:32:33,902 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 384 places, 535 transitions, 8074 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-06-27 20:32:33,908 INFO L231 Difference]: Finished difference. Result has 385 places, 516 transitions, 6796 flow [2024-06-27 20:32:33,908 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6376, PETRI_DIFFERENCE_MINUEND_PLACES=376, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=516, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=206, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=310, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6796, PETRI_PLACES=385, PETRI_TRANSITIONS=516} [2024-06-27 20:32:33,908 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 342 predicate places. [2024-06-27 20:32:33,908 INFO L495 AbstractCegarLoop]: Abstraction has has 385 places, 516 transitions, 6796 flow [2024-06-27 20:32:33,909 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:32:33,909 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:32:33,909 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:32:33,909 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable135 [2024-06-27 20:32:33,909 INFO L420 AbstractCegarLoop]: === Iteration 137 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:32:33,909 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:32:33,909 INFO L85 PathProgramCache]: Analyzing trace with hash 800728853, now seen corresponding path program 18 times [2024-06-27 20:32:33,909 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:32:33,910 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [146838474] [2024-06-27 20:32:33,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:32:33,910 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:32:33,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:32:34,622 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:32:34,623 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:32:34,623 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [146838474] [2024-06-27 20:32:34,623 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [146838474] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:32:34,623 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:32:34,623 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:32:34,623 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1883738618] [2024-06-27 20:32:34,623 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:32:34,624 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:32:34,624 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:32:34,624 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:32:34,624 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:32:34,705 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-27 20:32:34,705 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 385 places, 516 transitions, 6796 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:32:34,705 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:32:34,705 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-27 20:32:34,705 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:32:35,923 INFO L124 PetriNetUnfolderBase]: 3356/5316 cut-off events. [2024-06-27 20:32:35,923 INFO L125 PetriNetUnfolderBase]: For 1502142/1502147 co-relation queries the response was YES. [2024-06-27 20:32:35,986 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61779 conditions, 5316 events. 3356/5316 cut-off events. For 1502142/1502147 co-relation queries the response was YES. Maximal size of possible extension queue 343. Compared 31747 event pairs, 758 based on Foata normal form. 4/5312 useless extension candidates. Maximal degree in co-relation 61597. Up to 4054 conditions per place. [2024-06-27 20:32:36,012 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 308 selfloop transitions, 222 changer transitions 0/535 dead transitions. [2024-06-27 20:32:36,012 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 393 places, 535 transitions, 8498 flow [2024-06-27 20:32:36,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:32:36,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:32:36,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 170 transitions. [2024-06-27 20:32:36,013 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4497354497354497 [2024-06-27 20:32:36,013 INFO L175 Difference]: Start difference. First operand has 385 places, 516 transitions, 6796 flow. Second operand 9 states and 170 transitions. [2024-06-27 20:32:36,013 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 393 places, 535 transitions, 8498 flow [2024-06-27 20:32:40,624 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 387 places, 535 transitions, 8046 flow, removed 33 selfloop flow, removed 6 redundant places. [2024-06-27 20:32:40,630 INFO L231 Difference]: Finished difference. Result has 388 places, 516 transitions, 6794 flow [2024-06-27 20:32:40,630 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6344, PETRI_DIFFERENCE_MINUEND_PLACES=379, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=516, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=222, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=294, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6794, PETRI_PLACES=388, PETRI_TRANSITIONS=516} [2024-06-27 20:32:40,631 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 345 predicate places. [2024-06-27 20:32:40,631 INFO L495 AbstractCegarLoop]: Abstraction has has 388 places, 516 transitions, 6794 flow [2024-06-27 20:32:40,631 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:32:40,631 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:32:40,631 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:32:40,631 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable136 [2024-06-27 20:32:40,631 INFO L420 AbstractCegarLoop]: === Iteration 138 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:32:40,632 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:32:40,632 INFO L85 PathProgramCache]: Analyzing trace with hash -901134699, now seen corresponding path program 19 times [2024-06-27 20:32:40,632 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:32:40,632 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [846382909] [2024-06-27 20:32:40,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:32:40,632 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:32:40,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:32:41,350 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:32:41,351 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:32:41,351 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [846382909] [2024-06-27 20:32:41,351 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [846382909] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:32:41,351 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:32:41,351 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:32:41,351 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [548466933] [2024-06-27 20:32:41,351 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:32:41,352 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:32:41,352 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:32:41,352 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:32:41,352 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:32:41,423 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-27 20:32:41,423 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 388 places, 516 transitions, 6794 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:32:41,423 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:32:41,423 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-27 20:32:41,423 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:32:42,596 INFO L124 PetriNetUnfolderBase]: 3340/5310 cut-off events. [2024-06-27 20:32:42,596 INFO L125 PetriNetUnfolderBase]: For 1503569/1503574 co-relation queries the response was YES. [2024-06-27 20:32:42,659 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61084 conditions, 5310 events. 3340/5310 cut-off events. For 1503569/1503574 co-relation queries the response was YES. Maximal size of possible extension queue 345. Compared 31928 event pairs, 728 based on Foata normal form. 6/5308 useless extension candidates. Maximal degree in co-relation 60901. Up to 4041 conditions per place. [2024-06-27 20:32:42,684 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 337 selfloop transitions, 192 changer transitions 0/534 dead transitions. [2024-06-27 20:32:42,684 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 396 places, 534 transitions, 8224 flow [2024-06-27 20:32:42,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:32:42,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:32:42,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 169 transitions. [2024-06-27 20:32:42,685 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4470899470899471 [2024-06-27 20:32:42,685 INFO L175 Difference]: Start difference. First operand has 388 places, 516 transitions, 6794 flow. Second operand 9 states and 169 transitions. [2024-06-27 20:32:42,685 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 396 places, 534 transitions, 8224 flow [2024-06-27 20:32:47,560 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 387 places, 534 transitions, 7404 flow, removed 68 selfloop flow, removed 9 redundant places. [2024-06-27 20:32:47,566 INFO L231 Difference]: Finished difference. Result has 388 places, 516 transitions, 6367 flow [2024-06-27 20:32:47,566 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5974, PETRI_DIFFERENCE_MINUEND_PLACES=379, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=516, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=192, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=324, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6367, PETRI_PLACES=388, PETRI_TRANSITIONS=516} [2024-06-27 20:32:47,568 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 345 predicate places. [2024-06-27 20:32:47,568 INFO L495 AbstractCegarLoop]: Abstraction has has 388 places, 516 transitions, 6367 flow [2024-06-27 20:32:47,568 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:32:47,569 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:32:47,569 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:32:47,569 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137 [2024-06-27 20:32:47,569 INFO L420 AbstractCegarLoop]: === Iteration 139 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:32:47,569 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:32:47,569 INFO L85 PathProgramCache]: Analyzing trace with hash 801174323, now seen corresponding path program 20 times [2024-06-27 20:32:47,570 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:32:47,570 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2141915457] [2024-06-27 20:32:47,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:32:47,570 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:32:47,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:32:48,310 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:32:48,310 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:32:48,310 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2141915457] [2024-06-27 20:32:48,310 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2141915457] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:32:48,310 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:32:48,310 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:32:48,310 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [793822504] [2024-06-27 20:32:48,310 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:32:48,310 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:32:48,310 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:32:48,310 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:32:48,311 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:32:48,383 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-27 20:32:48,383 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 388 places, 516 transitions, 6367 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:32:48,383 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:32:48,383 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-27 20:32:48,383 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:32:49,505 INFO L124 PetriNetUnfolderBase]: 3330/5272 cut-off events. [2024-06-27 20:32:49,505 INFO L125 PetriNetUnfolderBase]: For 1479622/1479627 co-relation queries the response was YES. [2024-06-27 20:32:49,571 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60313 conditions, 5272 events. 3330/5272 cut-off events. For 1479622/1479627 co-relation queries the response was YES. Maximal size of possible extension queue 340. Compared 31402 event pairs, 756 based on Foata normal form. 4/5268 useless extension candidates. Maximal degree in co-relation 60129. Up to 4033 conditions per place. [2024-06-27 20:32:49,598 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 303 selfloop transitions, 225 changer transitions 0/533 dead transitions. [2024-06-27 20:32:49,599 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 396 places, 533 transitions, 7521 flow [2024-06-27 20:32:49,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:32:49,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:32:49,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 168 transitions. [2024-06-27 20:32:49,600 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4444444444444444 [2024-06-27 20:32:49,600 INFO L175 Difference]: Start difference. First operand has 388 places, 516 transitions, 6367 flow. Second operand 9 states and 168 transitions. [2024-06-27 20:32:49,600 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 396 places, 533 transitions, 7521 flow [2024-06-27 20:32:54,606 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 387 places, 533 transitions, 7038 flow, removed 29 selfloop flow, removed 9 redundant places. [2024-06-27 20:32:54,611 INFO L231 Difference]: Finished difference. Result has 388 places, 516 transitions, 6340 flow [2024-06-27 20:32:54,611 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5884, PETRI_DIFFERENCE_MINUEND_PLACES=379, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=516, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=225, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=291, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6340, PETRI_PLACES=388, PETRI_TRANSITIONS=516} [2024-06-27 20:32:54,612 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 345 predicate places. [2024-06-27 20:32:54,612 INFO L495 AbstractCegarLoop]: Abstraction has has 388 places, 516 transitions, 6340 flow [2024-06-27 20:32:54,612 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:32:54,612 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:32:54,612 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:32:54,612 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable138 [2024-06-27 20:32:54,612 INFO L420 AbstractCegarLoop]: === Iteration 140 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:32:54,613 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:32:54,613 INFO L85 PathProgramCache]: Analyzing trace with hash -901524958, now seen corresponding path program 7 times [2024-06-27 20:32:54,613 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:32:54,613 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1693452750] [2024-06-27 20:32:54,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:32:54,613 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:32:54,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:32:55,342 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:32:55,343 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:32:55,343 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1693452750] [2024-06-27 20:32:55,343 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1693452750] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:32:55,343 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:32:55,343 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:32:55,343 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [586481665] [2024-06-27 20:32:55,343 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:32:55,344 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:32:55,344 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:32:55,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:32:55,344 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:32:55,447 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-27 20:32:55,448 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 388 places, 516 transitions, 6340 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:32:55,448 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:32:55,448 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-27 20:32:55,448 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:32:56,714 INFO L124 PetriNetUnfolderBase]: 3374/5394 cut-off events. [2024-06-27 20:32:56,714 INFO L125 PetriNetUnfolderBase]: For 1600257/1600262 co-relation queries the response was YES. [2024-06-27 20:32:56,778 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61354 conditions, 5394 events. 3374/5394 cut-off events. For 1600257/1600262 co-relation queries the response was YES. Maximal size of possible extension queue 348. Compared 32848 event pairs, 722 based on Foata normal form. 14/5400 useless extension candidates. Maximal degree in co-relation 61169. Up to 4508 conditions per place. [2024-06-27 20:32:56,803 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 417 selfloop transitions, 117 changer transitions 0/539 dead transitions. [2024-06-27 20:32:56,803 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 396 places, 539 transitions, 7726 flow [2024-06-27 20:32:56,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:32:56,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:32:56,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 167 transitions. [2024-06-27 20:32:56,808 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4417989417989418 [2024-06-27 20:32:56,808 INFO L175 Difference]: Start difference. First operand has 388 places, 516 transitions, 6340 flow. Second operand 9 states and 167 transitions. [2024-06-27 20:32:56,808 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 396 places, 539 transitions, 7726 flow [2024-06-27 20:33:01,604 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 386 places, 539 transitions, 7128 flow, removed 0 selfloop flow, removed 10 redundant places. [2024-06-27 20:33:01,609 INFO L231 Difference]: Finished difference. Result has 387 places, 518 transitions, 6102 flow [2024-06-27 20:33:01,610 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5742, PETRI_DIFFERENCE_MINUEND_PLACES=378, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=516, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=115, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=399, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6102, PETRI_PLACES=387, PETRI_TRANSITIONS=518} [2024-06-27 20:33:01,610 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 344 predicate places. [2024-06-27 20:33:01,610 INFO L495 AbstractCegarLoop]: Abstraction has has 387 places, 518 transitions, 6102 flow [2024-06-27 20:33:01,610 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:33:01,610 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:33:01,610 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:33:01,610 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable139 [2024-06-27 20:33:01,610 INFO L420 AbstractCegarLoop]: === Iteration 141 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:33:01,611 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:33:01,611 INFO L85 PathProgramCache]: Analyzing trace with hash -401039680, now seen corresponding path program 8 times [2024-06-27 20:33:01,611 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:33:01,611 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [348729281] [2024-06-27 20:33:01,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:33:01,611 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:33:01,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:33:02,332 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:33:02,332 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:33:02,332 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [348729281] [2024-06-27 20:33:02,332 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [348729281] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:33:02,333 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:33:02,333 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:33:02,333 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [297841388] [2024-06-27 20:33:02,333 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:33:02,333 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:33:02,333 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:33:02,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:33:02,334 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:33:02,407 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-27 20:33:02,407 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 387 places, 518 transitions, 6102 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:33:02,407 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:33:02,407 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-27 20:33:02,408 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:33:03,852 INFO L124 PetriNetUnfolderBase]: 3418/5440 cut-off events. [2024-06-27 20:33:03,852 INFO L125 PetriNetUnfolderBase]: For 1626676/1626681 co-relation queries the response was YES. [2024-06-27 20:33:03,915 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61993 conditions, 5440 events. 3418/5440 cut-off events. For 1626676/1626681 co-relation queries the response was YES. Maximal size of possible extension queue 345. Compared 32867 event pairs, 740 based on Foata normal form. 14/5446 useless extension candidates. Maximal degree in co-relation 61807. Up to 4576 conditions per place. [2024-06-27 20:33:03,939 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 425 selfloop transitions, 111 changer transitions 0/541 dead transitions. [2024-06-27 20:33:03,939 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 395 places, 541 transitions, 7496 flow [2024-06-27 20:33:03,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:33:03,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:33:03,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 168 transitions. [2024-06-27 20:33:03,940 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4444444444444444 [2024-06-27 20:33:03,940 INFO L175 Difference]: Start difference. First operand has 387 places, 518 transitions, 6102 flow. Second operand 9 states and 168 transitions. [2024-06-27 20:33:03,940 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 395 places, 541 transitions, 7496 flow [2024-06-27 20:33:08,993 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 388 places, 541 transitions, 7182 flow, removed 42 selfloop flow, removed 7 redundant places. [2024-06-27 20:33:08,998 INFO L231 Difference]: Finished difference. Result has 389 places, 520 transitions, 6140 flow [2024-06-27 20:33:08,999 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5788, PETRI_DIFFERENCE_MINUEND_PLACES=380, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=518, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=109, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=407, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6140, PETRI_PLACES=389, PETRI_TRANSITIONS=520} [2024-06-27 20:33:08,999 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 346 predicate places. [2024-06-27 20:33:08,999 INFO L495 AbstractCegarLoop]: Abstraction has has 389 places, 520 transitions, 6140 flow [2024-06-27 20:33:08,999 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:33:08,999 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:33:08,999 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:33:09,000 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140 [2024-06-27 20:33:09,000 INFO L420 AbstractCegarLoop]: === Iteration 142 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:33:09,000 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:33:09,000 INFO L85 PathProgramCache]: Analyzing trace with hash -411764440, now seen corresponding path program 9 times [2024-06-27 20:33:09,000 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:33:09,000 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [746597817] [2024-06-27 20:33:09,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:33:09,001 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:33:09,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:33:09,794 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:33:09,794 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:33:09,794 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [746597817] [2024-06-27 20:33:09,794 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [746597817] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:33:09,794 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:33:09,795 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:33:09,795 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1097215663] [2024-06-27 20:33:09,795 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:33:09,795 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:33:09,795 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:33:09,795 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:33:09,795 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:33:09,879 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-27 20:33:09,879 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 389 places, 520 transitions, 6140 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:33:09,879 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:33:09,879 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-27 20:33:09,879 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:33:11,268 INFO L124 PetriNetUnfolderBase]: 3462/5514 cut-off events. [2024-06-27 20:33:11,268 INFO L125 PetriNetUnfolderBase]: For 1648331/1648336 co-relation queries the response was YES. [2024-06-27 20:33:11,331 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62878 conditions, 5514 events. 3462/5514 cut-off events. For 1648331/1648336 co-relation queries the response was YES. Maximal size of possible extension queue 345. Compared 33498 event pairs, 751 based on Foata normal form. 14/5520 useless extension candidates. Maximal degree in co-relation 62691. Up to 4644 conditions per place. [2024-06-27 20:33:11,354 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 419 selfloop transitions, 119 changer transitions 0/543 dead transitions. [2024-06-27 20:33:11,354 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 397 places, 543 transitions, 7542 flow [2024-06-27 20:33:11,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:33:11,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:33:11,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 168 transitions. [2024-06-27 20:33:11,355 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4444444444444444 [2024-06-27 20:33:11,355 INFO L175 Difference]: Start difference. First operand has 389 places, 520 transitions, 6140 flow. Second operand 9 states and 168 transitions. [2024-06-27 20:33:11,355 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 397 places, 543 transitions, 7542 flow [2024-06-27 20:33:16,444 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 390 places, 543 transitions, 7236 flow, removed 44 selfloop flow, removed 7 redundant places. [2024-06-27 20:33:16,450 INFO L231 Difference]: Finished difference. Result has 391 places, 522 transitions, 6206 flow [2024-06-27 20:33:16,450 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5834, PETRI_DIFFERENCE_MINUEND_PLACES=382, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=520, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=117, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=401, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6206, PETRI_PLACES=391, PETRI_TRANSITIONS=522} [2024-06-27 20:33:16,450 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 348 predicate places. [2024-06-27 20:33:16,450 INFO L495 AbstractCegarLoop]: Abstraction has has 391 places, 522 transitions, 6206 flow [2024-06-27 20:33:16,450 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:33:16,451 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:33:16,451 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:33:16,451 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141 [2024-06-27 20:33:16,451 INFO L420 AbstractCegarLoop]: === Iteration 143 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:33:16,451 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:33:16,451 INFO L85 PathProgramCache]: Analyzing trace with hash -412090870, now seen corresponding path program 10 times [2024-06-27 20:33:16,451 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:33:16,451 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1905296820] [2024-06-27 20:33:16,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:33:16,452 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:33:16,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:33:17,135 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:33:17,136 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:33:17,136 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1905296820] [2024-06-27 20:33:17,136 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1905296820] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:33:17,136 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:33:17,136 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:33:17,136 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1214256476] [2024-06-27 20:33:17,136 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:33:17,136 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:33:17,136 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:33:17,137 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:33:17,137 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:33:17,228 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-27 20:33:17,229 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 391 places, 522 transitions, 6206 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:33:17,229 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:33:17,229 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-27 20:33:17,229 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:33:18,746 INFO L124 PetriNetUnfolderBase]: 3493/5551 cut-off events. [2024-06-27 20:33:18,746 INFO L125 PetriNetUnfolderBase]: For 1642655/1642660 co-relation queries the response was YES. [2024-06-27 20:33:18,810 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63107 conditions, 5551 events. 3493/5551 cut-off events. For 1642655/1642660 co-relation queries the response was YES. Maximal size of possible extension queue 345. Compared 33592 event pairs, 742 based on Foata normal form. 14/5557 useless extension candidates. Maximal degree in co-relation 62919. Up to 4485 conditions per place. [2024-06-27 20:33:18,834 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 418 selfloop transitions, 126 changer transitions 0/549 dead transitions. [2024-06-27 20:33:18,835 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 399 places, 549 transitions, 7728 flow [2024-06-27 20:33:18,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:33:18,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:33:18,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 171 transitions. [2024-06-27 20:33:18,836 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4523809523809524 [2024-06-27 20:33:18,836 INFO L175 Difference]: Start difference. First operand has 391 places, 522 transitions, 6206 flow. Second operand 9 states and 171 transitions. [2024-06-27 20:33:18,836 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 399 places, 549 transitions, 7728 flow [2024-06-27 20:33:24,814 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 392 places, 549 transitions, 7402 flow, removed 46 selfloop flow, removed 7 redundant places. [2024-06-27 20:33:24,835 INFO L231 Difference]: Finished difference. Result has 393 places, 524 transitions, 6269 flow [2024-06-27 20:33:24,835 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5880, PETRI_DIFFERENCE_MINUEND_PLACES=384, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=522, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=124, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=396, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6269, PETRI_PLACES=393, PETRI_TRANSITIONS=524} [2024-06-27 20:33:24,842 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 350 predicate places. [2024-06-27 20:33:24,842 INFO L495 AbstractCegarLoop]: Abstraction has has 393 places, 524 transitions, 6269 flow [2024-06-27 20:33:24,842 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:33:24,842 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:33:24,842 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:33:24,843 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142 [2024-06-27 20:33:24,843 INFO L420 AbstractCegarLoop]: === Iteration 144 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:33:24,843 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:33:24,843 INFO L85 PathProgramCache]: Analyzing trace with hash -473041594, now seen corresponding path program 6 times [2024-06-27 20:33:24,843 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:33:24,843 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [397542182] [2024-06-27 20:33:24,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:33:24,843 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:33:24,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:33:25,647 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:33:25,648 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:33:25,648 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [397542182] [2024-06-27 20:33:25,648 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [397542182] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:33:25,648 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:33:25,648 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 20:33:25,648 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1677039878] [2024-06-27 20:33:25,648 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:33:25,648 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 20:33:25,648 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:33:25,648 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 20:33:25,648 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2024-06-27 20:33:25,742 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-27 20:33:25,742 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 393 places, 524 transitions, 6269 flow. Second operand has 11 states, 11 states have (on average 11.545454545454545) internal successors, (127), 11 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:33:25,742 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:33:25,742 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-27 20:33:25,742 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:33:27,231 INFO L124 PetriNetUnfolderBase]: 3580/5655 cut-off events. [2024-06-27 20:33:27,231 INFO L125 PetriNetUnfolderBase]: For 1694386/1694391 co-relation queries the response was YES. [2024-06-27 20:33:27,292 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66359 conditions, 5655 events. 3580/5655 cut-off events. For 1694386/1694391 co-relation queries the response was YES. Maximal size of possible extension queue 349. Compared 33968 event pairs, 723 based on Foata normal form. 5/5652 useless extension candidates. Maximal degree in co-relation 66170. Up to 4018 conditions per place. [2024-06-27 20:33:27,320 INFO L140 encePairwiseOnDemand]: 28/42 looper letters, 332 selfloop transitions, 226 changer transitions 0/563 dead transitions. [2024-06-27 20:33:27,320 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 402 places, 563 transitions, 9217 flow [2024-06-27 20:33:27,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:33:27,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:33:27,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 189 transitions. [2024-06-27 20:33:27,321 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45 [2024-06-27 20:33:27,321 INFO L175 Difference]: Start difference. First operand has 393 places, 524 transitions, 6269 flow. Second operand 10 states and 189 transitions. [2024-06-27 20:33:27,321 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 402 places, 563 transitions, 9217 flow [2024-06-27 20:33:32,372 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 395 places, 563 transitions, 8872 flow, removed 48 selfloop flow, removed 7 redundant places. [2024-06-27 20:33:32,378 INFO L231 Difference]: Finished difference. Result has 398 places, 539 transitions, 7157 flow [2024-06-27 20:33:32,378 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5924, PETRI_DIFFERENCE_MINUEND_PLACES=386, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=524, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=214, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=308, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7157, PETRI_PLACES=398, PETRI_TRANSITIONS=539} [2024-06-27 20:33:32,378 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 355 predicate places. [2024-06-27 20:33:32,378 INFO L495 AbstractCegarLoop]: Abstraction has has 398 places, 539 transitions, 7157 flow [2024-06-27 20:33:32,379 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.545454545454545) internal successors, (127), 11 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:33:32,379 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:33:32,379 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:33:32,379 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143 [2024-06-27 20:33:32,379 INFO L420 AbstractCegarLoop]: === Iteration 145 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:33:32,379 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:33:32,379 INFO L85 PathProgramCache]: Analyzing trace with hash -473028574, now seen corresponding path program 7 times [2024-06-27 20:33:32,380 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:33:32,380 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1843158647] [2024-06-27 20:33:32,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:33:32,380 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:33:32,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:33:33,194 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:33:33,194 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:33:33,195 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1843158647] [2024-06-27 20:33:33,195 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1843158647] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:33:33,195 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:33:33,195 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 20:33:33,195 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1447116065] [2024-06-27 20:33:33,195 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:33:33,195 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 20:33:33,195 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:33:33,195 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 20:33:33,195 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2024-06-27 20:33:33,292 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-27 20:33:33,292 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 398 places, 539 transitions, 7157 flow. Second operand has 11 states, 11 states have (on average 11.545454545454545) internal successors, (127), 11 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:33:33,292 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:33:33,292 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-27 20:33:33,292 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:33:34,807 INFO L124 PetriNetUnfolderBase]: 3631/5740 cut-off events. [2024-06-27 20:33:34,808 INFO L125 PetriNetUnfolderBase]: For 1766656/1766661 co-relation queries the response was YES. [2024-06-27 20:33:34,871 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69042 conditions, 5740 events. 3631/5740 cut-off events. For 1766656/1766661 co-relation queries the response was YES. Maximal size of possible extension queue 356. Compared 34681 event pairs, 725 based on Foata normal form. 5/5737 useless extension candidates. Maximal degree in co-relation 68850. Up to 4061 conditions per place. [2024-06-27 20:33:34,900 INFO L140 encePairwiseOnDemand]: 28/42 looper letters, 337 selfloop transitions, 229 changer transitions 0/571 dead transitions. [2024-06-27 20:33:34,900 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 407 places, 571 transitions, 9831 flow [2024-06-27 20:33:34,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:33:34,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:33:34,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 189 transitions. [2024-06-27 20:33:34,901 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45 [2024-06-27 20:33:34,901 INFO L175 Difference]: Start difference. First operand has 398 places, 539 transitions, 7157 flow. Second operand 10 states and 189 transitions. [2024-06-27 20:33:34,901 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 407 places, 571 transitions, 9831 flow [2024-06-27 20:33:40,591 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 403 places, 571 transitions, 9323 flow, removed 190 selfloop flow, removed 4 redundant places. [2024-06-27 20:33:40,597 INFO L231 Difference]: Finished difference. Result has 405 places, 547 transitions, 7546 flow [2024-06-27 20:33:40,598 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6733, PETRI_DIFFERENCE_MINUEND_PLACES=394, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=539, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=221, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=316, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7546, PETRI_PLACES=405, PETRI_TRANSITIONS=547} [2024-06-27 20:33:40,598 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 362 predicate places. [2024-06-27 20:33:40,598 INFO L495 AbstractCegarLoop]: Abstraction has has 405 places, 547 transitions, 7546 flow [2024-06-27 20:33:40,598 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.545454545454545) internal successors, (127), 11 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:33:40,598 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:33:40,598 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:33:40,598 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable144 [2024-06-27 20:33:40,599 INFO L420 AbstractCegarLoop]: === Iteration 146 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:33:40,599 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:33:40,599 INFO L85 PathProgramCache]: Analyzing trace with hash -352779582, now seen corresponding path program 8 times [2024-06-27 20:33:40,599 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:33:40,599 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [733278254] [2024-06-27 20:33:40,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:33:40,599 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:33:40,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:33:41,399 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:33:41,400 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:33:41,400 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [733278254] [2024-06-27 20:33:41,400 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [733278254] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:33:41,400 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:33:41,400 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 20:33:41,400 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [730332670] [2024-06-27 20:33:41,400 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:33:41,400 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 20:33:41,400 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:33:41,400 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 20:33:41,400 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2024-06-27 20:33:41,523 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-27 20:33:41,523 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 405 places, 547 transitions, 7546 flow. Second operand has 11 states, 11 states have (on average 11.545454545454545) internal successors, (127), 11 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:33:41,523 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:33:41,523 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-27 20:33:41,523 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:33:43,059 INFO L124 PetriNetUnfolderBase]: 3710/5853 cut-off events. [2024-06-27 20:33:43,059 INFO L125 PetriNetUnfolderBase]: For 1876698/1876703 co-relation queries the response was YES. [2024-06-27 20:33:43,126 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72373 conditions, 5853 events. 3710/5853 cut-off events. For 1876698/1876703 co-relation queries the response was YES. Maximal size of possible extension queue 363. Compared 35397 event pairs, 784 based on Foata normal form. 5/5850 useless extension candidates. Maximal degree in co-relation 72178. Up to 4126 conditions per place. [2024-06-27 20:33:43,157 INFO L140 encePairwiseOnDemand]: 28/42 looper letters, 355 selfloop transitions, 225 changer transitions 0/585 dead transitions. [2024-06-27 20:33:43,157 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 414 places, 585 transitions, 10840 flow [2024-06-27 20:33:43,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:33:43,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:33:43,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 192 transitions. [2024-06-27 20:33:43,158 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45714285714285713 [2024-06-27 20:33:43,158 INFO L175 Difference]: Start difference. First operand has 405 places, 547 transitions, 7546 flow. Second operand 10 states and 192 transitions. [2024-06-27 20:33:43,158 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 414 places, 585 transitions, 10840 flow [2024-06-27 20:33:48,428 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 408 places, 585 transitions, 10253 flow, removed 83 selfloop flow, removed 6 redundant places. [2024-06-27 20:33:48,434 INFO L231 Difference]: Finished difference. Result has 411 places, 559 transitions, 8078 flow [2024-06-27 20:33:48,434 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6977, PETRI_DIFFERENCE_MINUEND_PLACES=399, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=547, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=213, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=332, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=8078, PETRI_PLACES=411, PETRI_TRANSITIONS=559} [2024-06-27 20:33:48,434 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 368 predicate places. [2024-06-27 20:33:48,435 INFO L495 AbstractCegarLoop]: Abstraction has has 411 places, 559 transitions, 8078 flow [2024-06-27 20:33:48,435 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.545454545454545) internal successors, (127), 11 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:33:48,435 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:33:48,435 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:33:48,435 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable145 [2024-06-27 20:33:48,435 INFO L420 AbstractCegarLoop]: === Iteration 147 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:33:48,435 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:33:48,436 INFO L85 PathProgramCache]: Analyzing trace with hash -400652986, now seen corresponding path program 9 times [2024-06-27 20:33:48,436 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:33:48,436 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [133699142] [2024-06-27 20:33:48,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:33:48,436 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:33:48,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:33:49,187 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:33:49,187 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:33:49,187 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [133699142] [2024-06-27 20:33:49,187 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [133699142] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:33:49,187 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:33:49,187 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 20:33:49,187 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [812412518] [2024-06-27 20:33:49,188 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:33:49,188 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 20:33:49,188 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:33:49,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 20:33:49,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2024-06-27 20:33:49,283 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-27 20:33:49,283 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 411 places, 559 transitions, 8078 flow. Second operand has 11 states, 11 states have (on average 11.545454545454545) internal successors, (127), 11 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:33:49,283 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:33:49,283 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-27 20:33:49,283 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:33:50,864 INFO L124 PetriNetUnfolderBase]: 3749/5895 cut-off events. [2024-06-27 20:33:50,864 INFO L125 PetriNetUnfolderBase]: For 1942809/1942814 co-relation queries the response was YES. [2024-06-27 20:33:50,932 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73916 conditions, 5895 events. 3749/5895 cut-off events. For 1942809/1942814 co-relation queries the response was YES. Maximal size of possible extension queue 359. Compared 35468 event pairs, 784 based on Foata normal form. 5/5892 useless extension candidates. Maximal degree in co-relation 73718. Up to 4161 conditions per place. [2024-06-27 20:33:50,964 INFO L140 encePairwiseOnDemand]: 28/42 looper letters, 362 selfloop transitions, 226 changer transitions 0/593 dead transitions. [2024-06-27 20:33:50,964 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 420 places, 593 transitions, 11236 flow [2024-06-27 20:33:50,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:33:50,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:33:50,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 193 transitions. [2024-06-27 20:33:50,965 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4595238095238095 [2024-06-27 20:33:50,966 INFO L175 Difference]: Start difference. First operand has 411 places, 559 transitions, 8078 flow. Second operand 10 states and 193 transitions. [2024-06-27 20:33:50,966 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 420 places, 593 transitions, 11236 flow [2024-06-27 20:33:56,561 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 415 places, 593 transitions, 10700 flow, removed 127 selfloop flow, removed 5 redundant places. [2024-06-27 20:33:56,567 INFO L231 Difference]: Finished difference. Result has 418 places, 568 transitions, 8557 flow [2024-06-27 20:33:56,567 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7550, PETRI_DIFFERENCE_MINUEND_PLACES=406, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=559, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=217, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=340, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=8557, PETRI_PLACES=418, PETRI_TRANSITIONS=568} [2024-06-27 20:33:56,568 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 375 predicate places. [2024-06-27 20:33:56,568 INFO L495 AbstractCegarLoop]: Abstraction has has 418 places, 568 transitions, 8557 flow [2024-06-27 20:33:56,568 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.545454545454545) internal successors, (127), 11 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:33:56,568 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:33:56,568 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:33:56,568 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable146 [2024-06-27 20:33:56,568 INFO L420 AbstractCegarLoop]: === Iteration 148 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:33:56,569 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:33:56,569 INFO L85 PathProgramCache]: Analyzing trace with hash -411752536, now seen corresponding path program 10 times [2024-06-27 20:33:56,569 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:33:56,569 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1206851011] [2024-06-27 20:33:56,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:33:56,569 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:33:56,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:33:57,365 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:33:57,365 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:33:57,365 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1206851011] [2024-06-27 20:33:57,365 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1206851011] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:33:57,365 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:33:57,365 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 20:33:57,365 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1186131425] [2024-06-27 20:33:57,365 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:33:57,366 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 20:33:57,366 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:33:57,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 20:33:57,366 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2024-06-27 20:33:57,451 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-27 20:33:57,451 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 418 places, 568 transitions, 8557 flow. Second operand has 11 states, 11 states have (on average 11.545454545454545) internal successors, (127), 11 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:33:57,451 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:33:57,451 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-27 20:33:57,451 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:33:59,088 INFO L124 PetriNetUnfolderBase]: 3796/5967 cut-off events. [2024-06-27 20:33:59,089 INFO L125 PetriNetUnfolderBase]: For 2019529/2019534 co-relation queries the response was YES. [2024-06-27 20:33:59,163 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75658 conditions, 5967 events. 3796/5967 cut-off events. For 2019529/2019534 co-relation queries the response was YES. Maximal size of possible extension queue 361. Compared 35978 event pairs, 807 based on Foata normal form. 5/5964 useless extension candidates. Maximal degree in co-relation 75457. Up to 4205 conditions per place. [2024-06-27 20:33:59,195 INFO L140 encePairwiseOnDemand]: 28/42 looper letters, 323 selfloop transitions, 273 changer transitions 0/601 dead transitions. [2024-06-27 20:33:59,195 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 427 places, 601 transitions, 11325 flow [2024-06-27 20:33:59,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:33:59,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:33:59,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 191 transitions. [2024-06-27 20:33:59,196 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45476190476190476 [2024-06-27 20:33:59,196 INFO L175 Difference]: Start difference. First operand has 418 places, 568 transitions, 8557 flow. Second operand 10 states and 191 transitions. [2024-06-27 20:33:59,196 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 427 places, 601 transitions, 11325 flow [2024-06-27 20:34:05,776 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 419 places, 601 transitions, 10373 flow, removed 135 selfloop flow, removed 8 redundant places. [2024-06-27 20:34:05,783 INFO L231 Difference]: Finished difference. Result has 420 places, 579 transitions, 8740 flow [2024-06-27 20:34:05,783 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7644, PETRI_DIFFERENCE_MINUEND_PLACES=410, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=568, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=263, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=305, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=8740, PETRI_PLACES=420, PETRI_TRANSITIONS=579} [2024-06-27 20:34:05,783 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 377 predicate places. [2024-06-27 20:34:05,783 INFO L495 AbstractCegarLoop]: Abstraction has has 420 places, 579 transitions, 8740 flow [2024-06-27 20:34:05,783 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.545454545454545) internal successors, (127), 11 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:34:05,783 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:34:05,784 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:34:05,784 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable147 [2024-06-27 20:34:05,784 INFO L420 AbstractCegarLoop]: === Iteration 149 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:34:05,784 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:34:05,784 INFO L85 PathProgramCache]: Analyzing trace with hash -401027776, now seen corresponding path program 11 times [2024-06-27 20:34:05,784 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:34:05,784 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1454245022] [2024-06-27 20:34:05,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:34:05,785 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:34:05,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:34:06,577 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:34:06,577 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:34:06,577 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1454245022] [2024-06-27 20:34:06,577 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1454245022] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:34:06,577 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:34:06,577 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 20:34:06,577 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2107864056] [2024-06-27 20:34:06,577 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:34:06,577 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 20:34:06,578 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:34:06,578 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 20:34:06,578 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2024-06-27 20:34:06,657 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-27 20:34:06,657 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 420 places, 579 transitions, 8740 flow. Second operand has 11 states, 11 states have (on average 11.545454545454545) internal successors, (127), 11 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:34:06,658 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:34:06,658 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-27 20:34:06,658 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:34:08,287 INFO L124 PetriNetUnfolderBase]: 3787/5952 cut-off events. [2024-06-27 20:34:08,287 INFO L125 PetriNetUnfolderBase]: For 1995947/1995952 co-relation queries the response was YES. [2024-06-27 20:34:08,364 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74775 conditions, 5952 events. 3787/5952 cut-off events. For 1995947/1995952 co-relation queries the response was YES. Maximal size of possible extension queue 361. Compared 35810 event pairs, 802 based on Foata normal form. 5/5949 useless extension candidates. Maximal degree in co-relation 74573. Up to 4198 conditions per place. [2024-06-27 20:34:08,397 INFO L140 encePairwiseOnDemand]: 28/42 looper letters, 361 selfloop transitions, 237 changer transitions 0/603 dead transitions. [2024-06-27 20:34:08,397 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 429 places, 603 transitions, 11340 flow [2024-06-27 20:34:08,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:34:08,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:34:08,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 194 transitions. [2024-06-27 20:34:08,398 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46190476190476193 [2024-06-27 20:34:08,398 INFO L175 Difference]: Start difference. First operand has 420 places, 579 transitions, 8740 flow. Second operand 10 states and 194 transitions. [2024-06-27 20:34:08,398 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 429 places, 603 transitions, 11340 flow [2024-06-27 20:34:14,595 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 424 places, 603 transitions, 10954 flow, removed 130 selfloop flow, removed 5 redundant places. [2024-06-27 20:34:14,601 INFO L231 Difference]: Finished difference. Result has 425 places, 580 transitions, 8943 flow [2024-06-27 20:34:14,602 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8366, PETRI_DIFFERENCE_MINUEND_PLACES=415, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=579, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=236, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=342, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=8943, PETRI_PLACES=425, PETRI_TRANSITIONS=580} [2024-06-27 20:34:14,602 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 382 predicate places. [2024-06-27 20:34:14,602 INFO L495 AbstractCegarLoop]: Abstraction has has 425 places, 580 transitions, 8943 flow [2024-06-27 20:34:14,602 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.545454545454545) internal successors, (127), 11 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:34:14,602 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:34:14,602 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:34:14,603 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable148 [2024-06-27 20:34:14,603 INFO L420 AbstractCegarLoop]: === Iteration 150 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:34:14,603 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:34:14,603 INFO L85 PathProgramCache]: Analyzing trace with hash -458296444, now seen corresponding path program 12 times [2024-06-27 20:34:14,603 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:34:14,603 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [82494777] [2024-06-27 20:34:14,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:34:14,603 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:34:14,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:34:15,445 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:34:15,445 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:34:15,445 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [82494777] [2024-06-27 20:34:15,445 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [82494777] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:34:15,446 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:34:15,446 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 20:34:15,446 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [808684943] [2024-06-27 20:34:15,446 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:34:15,446 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 20:34:15,446 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:34:15,446 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 20:34:15,446 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-06-27 20:34:15,573 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-27 20:34:15,573 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 425 places, 580 transitions, 8943 flow. Second operand has 11 states, 11 states have (on average 11.545454545454545) internal successors, (127), 11 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:34:15,573 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:34:15,573 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-27 20:34:15,573 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:34:17,225 INFO L124 PetriNetUnfolderBase]: 3782/5923 cut-off events. [2024-06-27 20:34:17,225 INFO L125 PetriNetUnfolderBase]: For 1972420/1972423 co-relation queries the response was YES. [2024-06-27 20:34:17,303 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74715 conditions, 5923 events. 3782/5923 cut-off events. For 1972420/1972423 co-relation queries the response was YES. Maximal size of possible extension queue 364. Compared 35486 event pairs, 848 based on Foata normal form. 5/5925 useless extension candidates. Maximal degree in co-relation 74511. Up to 5454 conditions per place. [2024-06-27 20:34:17,338 INFO L140 encePairwiseOnDemand]: 28/42 looper letters, 526 selfloop transitions, 68 changer transitions 0/599 dead transitions. [2024-06-27 20:34:17,338 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 434 places, 599 transitions, 10529 flow [2024-06-27 20:34:17,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:34:17,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:34:17,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 176 transitions. [2024-06-27 20:34:17,339 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41904761904761906 [2024-06-27 20:34:17,339 INFO L175 Difference]: Start difference. First operand has 425 places, 580 transitions, 8943 flow. Second operand 10 states and 176 transitions. [2024-06-27 20:34:17,339 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 434 places, 599 transitions, 10529 flow [2024-06-27 20:34:26,499 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 427 places, 599 transitions, 9775 flow, removed 167 selfloop flow, removed 7 redundant places. [2024-06-27 20:34:26,506 INFO L231 Difference]: Finished difference. Result has 428 places, 580 transitions, 8333 flow [2024-06-27 20:34:26,506 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8189, PETRI_DIFFERENCE_MINUEND_PLACES=418, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=580, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=512, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=8333, PETRI_PLACES=428, PETRI_TRANSITIONS=580} [2024-06-27 20:34:26,506 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 385 predicate places. [2024-06-27 20:34:26,506 INFO L495 AbstractCegarLoop]: Abstraction has has 428 places, 580 transitions, 8333 flow [2024-06-27 20:34:26,507 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.545454545454545) internal successors, (127), 11 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:34:26,507 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:34:26,507 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:34:26,507 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable149 [2024-06-27 20:34:26,507 INFO L420 AbstractCegarLoop]: === Iteration 151 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:34:26,507 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:34:26,507 INFO L85 PathProgramCache]: Analyzing trace with hash -457790989, now seen corresponding path program 2 times [2024-06-27 20:34:26,507 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:34:26,508 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1718197902] [2024-06-27 20:34:26,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:34:26,508 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:34:26,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:34:27,654 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:34:27,654 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:34:27,654 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1718197902] [2024-06-27 20:34:27,654 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1718197902] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:34:27,654 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:34:27,654 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 20:34:27,654 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [586054831] [2024-06-27 20:34:27,655 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:34:27,655 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 20:34:27,655 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:34:27,655 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 20:34:27,655 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-27 20:34:27,803 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-27 20:34:27,804 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 428 places, 580 transitions, 8333 flow. Second operand has 11 states, 11 states have (on average 11.545454545454545) internal successors, (127), 11 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:34:27,804 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:34:27,804 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-27 20:34:27,804 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:34:29,402 INFO L124 PetriNetUnfolderBase]: 3795/5926 cut-off events. [2024-06-27 20:34:29,403 INFO L125 PetriNetUnfolderBase]: For 1994772/1994772 co-relation queries the response was YES. [2024-06-27 20:34:29,480 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74206 conditions, 5926 events. 3795/5926 cut-off events. For 1994772/1994772 co-relation queries the response was YES. Maximal size of possible extension queue 363. Compared 35254 event pairs, 878 based on Foata normal form. 1/5925 useless extension candidates. Maximal degree in co-relation 74001. Up to 5617 conditions per place. [2024-06-27 20:34:29,514 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 567 selfloop transitions, 29 changer transitions 0/601 dead transitions. [2024-06-27 20:34:29,514 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 438 places, 601 transitions, 10181 flow [2024-06-27 20:34:29,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 20:34:29,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 20:34:29,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 177 transitions. [2024-06-27 20:34:29,515 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38311688311688313 [2024-06-27 20:34:29,515 INFO L175 Difference]: Start difference. First operand has 428 places, 580 transitions, 8333 flow. Second operand 11 states and 177 transitions. [2024-06-27 20:34:29,515 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 438 places, 601 transitions, 10181 flow [2024-06-27 20:34:38,118 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 425 places, 601 transitions, 9514 flow, removed 23 selfloop flow, removed 13 redundant places. [2024-06-27 20:34:38,125 INFO L231 Difference]: Finished difference. Result has 426 places, 586 transitions, 8060 flow [2024-06-27 20:34:38,125 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7666, PETRI_DIFFERENCE_MINUEND_PLACES=415, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=580, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=554, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=8060, PETRI_PLACES=426, PETRI_TRANSITIONS=586} [2024-06-27 20:34:38,126 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 383 predicate places. [2024-06-27 20:34:38,126 INFO L495 AbstractCegarLoop]: Abstraction has has 426 places, 586 transitions, 8060 flow [2024-06-27 20:34:38,126 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.545454545454545) internal successors, (127), 11 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:34:38,126 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:34:38,126 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:34:38,126 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable150 [2024-06-27 20:34:38,126 INFO L420 AbstractCegarLoop]: === Iteration 152 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:34:38,127 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:34:38,127 INFO L85 PathProgramCache]: Analyzing trace with hash -400639966, now seen corresponding path program 13 times [2024-06-27 20:34:38,127 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:34:38,127 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [514906289] [2024-06-27 20:34:38,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:34:38,128 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:34:38,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:34:38,985 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:34:38,985 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:34:38,985 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [514906289] [2024-06-27 20:34:38,985 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [514906289] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:34:38,985 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:34:38,986 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 20:34:38,986 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [323952692] [2024-06-27 20:34:38,986 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:34:38,986 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 20:34:38,986 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:34:38,986 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 20:34:38,986 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2024-06-27 20:34:39,088 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-27 20:34:39,088 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 426 places, 586 transitions, 8060 flow. Second operand has 11 states, 11 states have (on average 11.545454545454545) internal successors, (127), 11 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:34:39,088 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:34:39,088 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-27 20:34:39,088 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:34:40,692 INFO L124 PetriNetUnfolderBase]: 3790/5960 cut-off events. [2024-06-27 20:34:40,692 INFO L125 PetriNetUnfolderBase]: For 2005023/2005028 co-relation queries the response was YES. [2024-06-27 20:34:40,775 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72912 conditions, 5960 events. 3790/5960 cut-off events. For 2005023/2005028 co-relation queries the response was YES. Maximal size of possible extension queue 362. Compared 35890 event pairs, 788 based on Foata normal form. 5/5957 useless extension candidates. Maximal degree in co-relation 72709. Up to 4212 conditions per place. [2024-06-27 20:34:40,809 INFO L140 encePairwiseOnDemand]: 28/42 looper letters, 368 selfloop transitions, 235 changer transitions 0/608 dead transitions. [2024-06-27 20:34:40,810 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 435 places, 608 transitions, 10286 flow [2024-06-27 20:34:40,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:34:40,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:34:40,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 191 transitions. [2024-06-27 20:34:40,811 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45476190476190476 [2024-06-27 20:34:40,811 INFO L175 Difference]: Start difference. First operand has 426 places, 586 transitions, 8060 flow. Second operand 10 states and 191 transitions. [2024-06-27 20:34:40,811 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 435 places, 608 transitions, 10286 flow [2024-06-27 20:34:48,093 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 428 places, 608 transitions, 9908 flow, removed 176 selfloop flow, removed 7 redundant places. [2024-06-27 20:34:48,099 INFO L231 Difference]: Finished difference. Result has 429 places, 586 transitions, 8160 flow [2024-06-27 20:34:48,100 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7682, PETRI_DIFFERENCE_MINUEND_PLACES=419, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=586, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=235, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=351, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=8160, PETRI_PLACES=429, PETRI_TRANSITIONS=586} [2024-06-27 20:34:48,100 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 386 predicate places. [2024-06-27 20:34:48,100 INFO L495 AbstractCegarLoop]: Abstraction has has 429 places, 586 transitions, 8160 flow [2024-06-27 20:34:48,100 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.545454545454545) internal successors, (127), 11 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:34:48,100 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:34:48,100 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:34:48,101 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151 [2024-06-27 20:34:48,101 INFO L420 AbstractCegarLoop]: === Iteration 153 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:34:48,101 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:34:48,101 INFO L85 PathProgramCache]: Analyzing trace with hash -400639501, now seen corresponding path program 3 times [2024-06-27 20:34:48,101 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:34:48,101 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1770835010] [2024-06-27 20:34:48,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:34:48,102 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:34:48,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:34:49,157 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:34:49,157 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:34:49,157 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1770835010] [2024-06-27 20:34:49,158 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1770835010] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:34:49,158 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:34:49,158 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 20:34:49,158 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [156901680] [2024-06-27 20:34:49,158 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:34:49,158 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 20:34:49,158 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:34:49,159 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 20:34:49,159 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2024-06-27 20:34:49,316 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-27 20:34:49,316 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 429 places, 586 transitions, 8160 flow. Second operand has 11 states, 11 states have (on average 11.545454545454545) internal successors, (127), 11 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:34:49,316 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:34:49,316 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-27 20:34:49,316 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:34:50,824 INFO L124 PetriNetUnfolderBase]: 3795/5933 cut-off events. [2024-06-27 20:34:50,825 INFO L125 PetriNetUnfolderBase]: For 2007647/2007655 co-relation queries the response was YES. [2024-06-27 20:34:50,905 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73735 conditions, 5933 events. 3795/5933 cut-off events. For 2007647/2007655 co-relation queries the response was YES. Maximal size of possible extension queue 364. Compared 35422 event pairs, 882 based on Foata normal form. 7/5937 useless extension candidates. Maximal degree in co-relation 73530. Up to 5571 conditions per place. [2024-06-27 20:34:50,940 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 542 selfloop transitions, 55 changer transitions 0/602 dead transitions. [2024-06-27 20:34:50,940 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 438 places, 602 transitions, 9552 flow [2024-06-27 20:34:50,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:34:50,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:34:50,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 169 transitions. [2024-06-27 20:34:50,941 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4023809523809524 [2024-06-27 20:34:50,941 INFO L175 Difference]: Start difference. First operand has 429 places, 586 transitions, 8160 flow. Second operand 10 states and 169 transitions. [2024-06-27 20:34:50,941 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 438 places, 602 transitions, 9552 flow [2024-06-27 20:34:59,848 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 430 places, 602 transitions, 9083 flow, removed 7 selfloop flow, removed 8 redundant places. [2024-06-27 20:34:59,855 INFO L231 Difference]: Finished difference. Result has 431 places, 589 transitions, 7981 flow [2024-06-27 20:34:59,855 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7691, PETRI_DIFFERENCE_MINUEND_PLACES=421, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=586, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=531, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7981, PETRI_PLACES=431, PETRI_TRANSITIONS=589} [2024-06-27 20:34:59,855 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 388 predicate places. [2024-06-27 20:34:59,855 INFO L495 AbstractCegarLoop]: Abstraction has has 431 places, 589 transitions, 7981 flow [2024-06-27 20:34:59,855 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.545454545454545) internal successors, (127), 11 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:34:59,856 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:34:59,856 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:34:59,856 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152 [2024-06-27 20:34:59,856 INFO L420 AbstractCegarLoop]: === Iteration 154 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:34:59,856 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:34:59,856 INFO L85 PathProgramCache]: Analyzing trace with hash -901513054, now seen corresponding path program 14 times [2024-06-27 20:34:59,856 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:34:59,856 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [932259602] [2024-06-27 20:34:59,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:34:59,857 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:34:59,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:35:00,701 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:35:00,701 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:35:00,701 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [932259602] [2024-06-27 20:35:00,701 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [932259602] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:35:00,701 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:35:00,701 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 20:35:00,702 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1071098140] [2024-06-27 20:35:00,702 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:35:00,702 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 20:35:00,702 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:35:00,702 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 20:35:00,702 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2024-06-27 20:35:00,785 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-27 20:35:00,785 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 431 places, 589 transitions, 7981 flow. Second operand has 11 states, 11 states have (on average 11.545454545454545) internal successors, (127), 11 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:35:00,785 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:35:00,785 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-27 20:35:00,785 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:35:02,321 INFO L124 PetriNetUnfolderBase]: 3786/5971 cut-off events. [2024-06-27 20:35:02,322 INFO L125 PetriNetUnfolderBase]: For 2019431/2019436 co-relation queries the response was YES. [2024-06-27 20:35:02,397 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72623 conditions, 5971 events. 3786/5971 cut-off events. For 2019431/2019436 co-relation queries the response was YES. Maximal size of possible extension queue 369. Compared 36124 event pairs, 777 based on Foata normal form. 5/5968 useless extension candidates. Maximal degree in co-relation 72417. Up to 4212 conditions per place. [2024-06-27 20:35:02,429 INFO L140 encePairwiseOnDemand]: 28/42 looper letters, 349 selfloop transitions, 257 changer transitions 0/611 dead transitions. [2024-06-27 20:35:02,430 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 440 places, 611 transitions, 10225 flow [2024-06-27 20:35:02,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:35:02,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:35:02,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 190 transitions. [2024-06-27 20:35:02,430 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4523809523809524 [2024-06-27 20:35:02,431 INFO L175 Difference]: Start difference. First operand has 431 places, 589 transitions, 7981 flow. Second operand 10 states and 190 transitions. [2024-06-27 20:35:02,431 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 440 places, 611 transitions, 10225 flow [2024-06-27 20:35:09,051 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 432 places, 611 transitions, 9957 flow, removed 81 selfloop flow, removed 8 redundant places. [2024-06-27 20:35:09,058 INFO L231 Difference]: Finished difference. Result has 433 places, 589 transitions, 8234 flow [2024-06-27 20:35:09,058 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7713, PETRI_DIFFERENCE_MINUEND_PLACES=423, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=589, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=257, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=332, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=8234, PETRI_PLACES=433, PETRI_TRANSITIONS=589} [2024-06-27 20:35:09,058 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 390 predicate places. [2024-06-27 20:35:09,058 INFO L495 AbstractCegarLoop]: Abstraction has has 433 places, 589 transitions, 8234 flow [2024-06-27 20:35:09,059 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.545454545454545) internal successors, (127), 11 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:35:09,059 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:35:09,059 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:35:09,059 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable153 [2024-06-27 20:35:09,059 INFO L420 AbstractCegarLoop]: === Iteration 155 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:35:09,059 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:35:09,059 INFO L85 PathProgramCache]: Analyzing trace with hash -472595659, now seen corresponding path program 4 times [2024-06-27 20:35:09,059 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:35:09,060 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [798775365] [2024-06-27 20:35:09,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:35:09,060 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:35:09,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:35:09,972 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:35:09,972 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:35:09,973 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [798775365] [2024-06-27 20:35:09,973 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [798775365] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:35:09,973 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:35:09,973 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 20:35:09,973 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [643572658] [2024-06-27 20:35:09,973 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:35:09,973 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 20:35:09,973 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:35:09,974 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 20:35:09,974 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-27 20:35:10,115 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-27 20:35:10,115 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 433 places, 589 transitions, 8234 flow. Second operand has 11 states, 11 states have (on average 11.545454545454545) internal successors, (127), 11 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:35:10,115 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:35:10,115 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-27 20:35:10,115 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:35:11,674 INFO L124 PetriNetUnfolderBase]: 3783/5915 cut-off events. [2024-06-27 20:35:11,675 INFO L125 PetriNetUnfolderBase]: For 2010936/2010936 co-relation queries the response was YES. [2024-06-27 20:35:11,750 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73296 conditions, 5915 events. 3783/5915 cut-off events. For 2010936/2010936 co-relation queries the response was YES. Maximal size of possible extension queue 365. Compared 35259 event pairs, 873 based on Foata normal form. 1/5914 useless extension candidates. Maximal degree in co-relation 73089. Up to 5609 conditions per place. [2024-06-27 20:35:11,783 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 574 selfloop transitions, 23 changer transitions 0/602 dead transitions. [2024-06-27 20:35:11,783 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 442 places, 602 transitions, 9458 flow [2024-06-27 20:35:11,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:35:11,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:35:11,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 161 transitions. [2024-06-27 20:35:11,784 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38333333333333336 [2024-06-27 20:35:11,784 INFO L175 Difference]: Start difference. First operand has 433 places, 589 transitions, 8234 flow. Second operand 10 states and 161 transitions. [2024-06-27 20:35:11,784 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 442 places, 602 transitions, 9458 flow [2024-06-27 20:35:20,773 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 430 places, 602 transitions, 8560 flow, removed 146 selfloop flow, removed 12 redundant places. [2024-06-27 20:35:20,780 INFO L231 Difference]: Finished difference. Result has 431 places, 589 transitions, 7388 flow [2024-06-27 20:35:20,780 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7336, PETRI_DIFFERENCE_MINUEND_PLACES=421, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=589, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=566, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7388, PETRI_PLACES=431, PETRI_TRANSITIONS=589} [2024-06-27 20:35:20,780 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 388 predicate places. [2024-06-27 20:35:20,780 INFO L495 AbstractCegarLoop]: Abstraction has has 431 places, 589 transitions, 7388 flow [2024-06-27 20:35:20,780 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.545454545454545) internal successors, (127), 11 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:35:20,781 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:35:20,781 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:35:20,781 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable154 [2024-06-27 20:35:20,781 INFO L420 AbstractCegarLoop]: === Iteration 156 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:35:20,781 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:35:20,781 INFO L85 PathProgramCache]: Analyzing trace with hash -888612559, now seen corresponding path program 5 times [2024-06-27 20:35:20,782 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:35:20,782 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [883119942] [2024-06-27 20:35:20,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:35:20,782 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:35:20,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:35:21,936 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:35:21,936 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:35:21,936 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [883119942] [2024-06-27 20:35:21,936 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [883119942] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:35:21,936 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:35:21,936 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 20:35:21,937 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1640264772] [2024-06-27 20:35:21,937 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:35:21,937 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 20:35:21,937 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:35:21,937 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 20:35:21,937 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2024-06-27 20:35:22,084 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-27 20:35:22,084 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 431 places, 589 transitions, 7388 flow. Second operand has 11 states, 11 states have (on average 11.545454545454545) internal successors, (127), 11 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:35:22,084 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:35:22,084 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-27 20:35:22,084 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:35:23,763 INFO L124 PetriNetUnfolderBase]: 3788/5922 cut-off events. [2024-06-27 20:35:23,764 INFO L125 PetriNetUnfolderBase]: For 2028254/2028262 co-relation queries the response was YES. [2024-06-27 20:35:23,831 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72035 conditions, 5922 events. 3788/5922 cut-off events. For 2028254/2028262 co-relation queries the response was YES. Maximal size of possible extension queue 366. Compared 35301 event pairs, 882 based on Foata normal form. 7/5926 useless extension candidates. Maximal degree in co-relation 71831. Up to 5562 conditions per place. [2024-06-27 20:35:23,860 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 542 selfloop transitions, 58 changer transitions 0/605 dead transitions. [2024-06-27 20:35:23,860 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 440 places, 605 transitions, 8792 flow [2024-06-27 20:35:23,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:35:23,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:35:23,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 167 transitions. [2024-06-27 20:35:23,861 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3976190476190476 [2024-06-27 20:35:23,861 INFO L175 Difference]: Start difference. First operand has 431 places, 589 transitions, 7388 flow. Second operand 10 states and 167 transitions. [2024-06-27 20:35:23,861 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 440 places, 605 transitions, 8792 flow [2024-06-27 20:35:31,205 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 431 places, 605 transitions, 8734 flow, removed 4 selfloop flow, removed 9 redundant places. [2024-06-27 20:35:31,212 INFO L231 Difference]: Finished difference. Result has 432 places, 592 transitions, 7632 flow [2024-06-27 20:35:31,212 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7330, PETRI_DIFFERENCE_MINUEND_PLACES=422, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=589, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=531, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7632, PETRI_PLACES=432, PETRI_TRANSITIONS=592} [2024-06-27 20:35:31,212 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 389 predicate places. [2024-06-27 20:35:31,212 INFO L495 AbstractCegarLoop]: Abstraction has has 432 places, 592 transitions, 7632 flow [2024-06-27 20:35:31,213 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.545454545454545) internal successors, (127), 11 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:35:31,213 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:35:31,213 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:35:31,213 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable155 [2024-06-27 20:35:31,213 INFO L420 AbstractCegarLoop]: === Iteration 157 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:35:31,213 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:35:31,213 INFO L85 PathProgramCache]: Analyzing trace with hash -901124779, now seen corresponding path program 6 times [2024-06-27 20:35:31,214 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:35:31,214 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [33389916] [2024-06-27 20:35:31,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:35:31,214 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:35:31,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:35:32,086 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:35:32,086 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:35:32,086 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [33389916] [2024-06-27 20:35:32,087 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [33389916] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:35:32,087 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:35:32,087 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 20:35:32,087 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [206567313] [2024-06-27 20:35:32,087 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:35:32,087 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 20:35:32,087 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:35:32,088 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 20:35:32,088 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2024-06-27 20:35:32,211 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-27 20:35:32,211 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 432 places, 592 transitions, 7632 flow. Second operand has 11 states, 11 states have (on average 11.545454545454545) internal successors, (127), 11 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:35:32,211 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:35:32,211 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-27 20:35:32,212 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:35:33,792 INFO L124 PetriNetUnfolderBase]: 3785/5918 cut-off events. [2024-06-27 20:35:33,792 INFO L125 PetriNetUnfolderBase]: For 2039644/2039652 co-relation queries the response was YES. [2024-06-27 20:35:33,868 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72200 conditions, 5918 events. 3785/5918 cut-off events. For 2039644/2039652 co-relation queries the response was YES. Maximal size of possible extension queue 366. Compared 35227 event pairs, 882 based on Foata normal form. 7/5922 useless extension candidates. Maximal degree in co-relation 71995. Up to 5558 conditions per place. [2024-06-27 20:35:33,898 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 547 selfloop transitions, 56 changer transitions 0/608 dead transitions. [2024-06-27 20:35:33,898 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 441 places, 608 transitions, 9048 flow [2024-06-27 20:35:33,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:35:33,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:35:33,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 168 transitions. [2024-06-27 20:35:33,899 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4 [2024-06-27 20:35:33,899 INFO L175 Difference]: Start difference. First operand has 432 places, 592 transitions, 7632 flow. Second operand 10 states and 168 transitions. [2024-06-27 20:35:33,899 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 441 places, 608 transitions, 9048 flow [2024-06-27 20:35:41,927 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 433 places, 608 transitions, 8768 flow, removed 84 selfloop flow, removed 8 redundant places. [2024-06-27 20:35:41,935 INFO L231 Difference]: Finished difference. Result has 434 places, 595 transitions, 7656 flow [2024-06-27 20:35:41,935 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7352, PETRI_DIFFERENCE_MINUEND_PLACES=424, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=592, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=536, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7656, PETRI_PLACES=434, PETRI_TRANSITIONS=595} [2024-06-27 20:35:41,936 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 391 predicate places. [2024-06-27 20:35:41,936 INFO L495 AbstractCegarLoop]: Abstraction has has 434 places, 595 transitions, 7656 flow [2024-06-27 20:35:41,936 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.545454545454545) internal successors, (127), 11 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:35:41,936 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:35:41,936 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:35:41,936 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable156 [2024-06-27 20:35:41,936 INFO L420 AbstractCegarLoop]: === Iteration 158 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:35:41,937 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:35:41,937 INFO L85 PathProgramCache]: Analyzing trace with hash -901125244, now seen corresponding path program 15 times [2024-06-27 20:35:41,937 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:35:41,937 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [757885759] [2024-06-27 20:35:41,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:35:41,937 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:35:41,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:35:42,717 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:35:42,718 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:35:42,718 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [757885759] [2024-06-27 20:35:42,718 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [757885759] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:35:42,718 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:35:42,718 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 20:35:42,718 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [362155727] [2024-06-27 20:35:42,718 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:35:42,719 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 20:35:42,719 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:35:42,719 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 20:35:42,719 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2024-06-27 20:35:42,778 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-27 20:35:42,779 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 434 places, 595 transitions, 7656 flow. Second operand has 11 states, 11 states have (on average 11.545454545454545) internal successors, (127), 11 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:35:42,779 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:35:42,779 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-27 20:35:42,779 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:35:44,508 INFO L124 PetriNetUnfolderBase]: 3780/5962 cut-off events. [2024-06-27 20:35:44,508 INFO L125 PetriNetUnfolderBase]: For 2051532/2051537 co-relation queries the response was YES. [2024-06-27 20:35:44,596 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71887 conditions, 5962 events. 3780/5962 cut-off events. For 2051532/2051537 co-relation queries the response was YES. Maximal size of possible extension queue 370. Compared 36106 event pairs, 774 based on Foata normal form. 5/5959 useless extension candidates. Maximal degree in co-relation 71681. Up to 4209 conditions per place. [2024-06-27 20:35:44,628 INFO L140 encePairwiseOnDemand]: 28/42 looper letters, 373 selfloop transitions, 239 changer transitions 0/617 dead transitions. [2024-06-27 20:35:44,628 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 443 places, 617 transitions, 9936 flow [2024-06-27 20:35:44,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:35:44,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:35:44,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 190 transitions. [2024-06-27 20:35:44,629 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4523809523809524 [2024-06-27 20:35:44,629 INFO L175 Difference]: Start difference. First operand has 434 places, 595 transitions, 7656 flow. Second operand 10 states and 190 transitions. [2024-06-27 20:35:44,629 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 443 places, 617 transitions, 9936 flow [2024-06-27 20:35:51,825 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 435 places, 617 transitions, 9502 flow, removed 163 selfloop flow, removed 8 redundant places. [2024-06-27 20:35:51,855 INFO L231 Difference]: Finished difference. Result has 436 places, 595 transitions, 7708 flow [2024-06-27 20:35:51,856 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7222, PETRI_DIFFERENCE_MINUEND_PLACES=426, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=595, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=239, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=356, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7708, PETRI_PLACES=436, PETRI_TRANSITIONS=595} [2024-06-27 20:35:51,856 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 393 predicate places. [2024-06-27 20:35:51,856 INFO L495 AbstractCegarLoop]: Abstraction has has 436 places, 595 transitions, 7708 flow [2024-06-27 20:35:51,856 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.545454545454545) internal successors, (127), 11 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:35:51,856 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:35:51,856 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:35:51,857 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable157 [2024-06-27 20:35:51,857 INFO L420 AbstractCegarLoop]: === Iteration 159 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:35:51,857 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:35:51,857 INFO L85 PathProgramCache]: Analyzing trace with hash -1473932366, now seen corresponding path program 1 times [2024-06-27 20:35:51,857 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:35:51,857 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1754081035] [2024-06-27 20:35:51,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:35:51,857 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:35:51,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:35:52,802 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:35:52,802 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:35:52,802 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1754081035] [2024-06-27 20:35:52,802 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1754081035] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:35:52,802 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:35:52,802 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:35:52,803 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1249441491] [2024-06-27 20:35:52,803 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:35:52,803 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:35:52,803 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:35:52,803 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:35:52,803 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:35:52,916 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-27 20:35:52,917 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 436 places, 595 transitions, 7708 flow. Second operand has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 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) [2024-06-27 20:35:52,917 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:35:52,917 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-27 20:35:52,917 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:35:54,382 INFO L124 PetriNetUnfolderBase]: 3624/5759 cut-off events. [2024-06-27 20:35:54,382 INFO L125 PetriNetUnfolderBase]: For 2069868/2069868 co-relation queries the response was YES. [2024-06-27 20:35:54,458 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71627 conditions, 5759 events. 3624/5759 cut-off events. For 2069868/2069868 co-relation queries the response was YES. Maximal size of possible extension queue 368. Compared 35157 event pairs, 768 based on Foata normal form. 2/5754 useless extension candidates. Maximal degree in co-relation 71420. Up to 5174 conditions per place. [2024-06-27 20:35:54,491 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 559 selfloop transitions, 17 changer transitions 0/621 dead transitions. [2024-06-27 20:35:54,491 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 444 places, 621 transitions, 9002 flow [2024-06-27 20:35:54,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:35:54,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:35:54,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 164 transitions. [2024-06-27 20:35:54,492 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43386243386243384 [2024-06-27 20:35:54,492 INFO L175 Difference]: Start difference. First operand has 436 places, 595 transitions, 7708 flow. Second operand 9 states and 164 transitions. [2024-06-27 20:35:54,492 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 444 places, 621 transitions, 9002 flow [2024-06-27 20:36:03,791 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 434 places, 621 transitions, 8459 flow, removed 9 selfloop flow, removed 10 redundant places. [2024-06-27 20:36:03,798 INFO L231 Difference]: Finished difference. Result has 435 places, 597 transitions, 7292 flow [2024-06-27 20:36:03,798 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7165, PETRI_DIFFERENCE_MINUEND_PLACES=426, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=595, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=578, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7292, PETRI_PLACES=435, PETRI_TRANSITIONS=597} [2024-06-27 20:36:03,798 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 392 predicate places. [2024-06-27 20:36:03,798 INFO L495 AbstractCegarLoop]: Abstraction has has 435 places, 597 transitions, 7292 flow [2024-06-27 20:36:03,798 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 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) [2024-06-27 20:36:03,798 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:36:03,799 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:36:03,799 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable158 [2024-06-27 20:36:03,799 INFO L420 AbstractCegarLoop]: === Iteration 160 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:36:03,799 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:36:03,799 INFO L85 PathProgramCache]: Analyzing trace with hash -282591372, now seen corresponding path program 2 times [2024-06-27 20:36:03,799 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:36:03,800 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [148606180] [2024-06-27 20:36:03,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:36:03,800 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:36:03,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:36:04,682 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:36:04,682 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:36:04,683 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [148606180] [2024-06-27 20:36:04,683 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [148606180] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:36:04,683 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:36:04,683 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:36:04,683 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1509477983] [2024-06-27 20:36:04,683 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:36:04,683 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:36:04,683 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:36:04,683 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:36:04,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:36:04,849 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-27 20:36:04,849 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 435 places, 597 transitions, 7292 flow. Second operand has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 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) [2024-06-27 20:36:04,849 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:36:04,849 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-27 20:36:04,849 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:36:06,578 INFO L124 PetriNetUnfolderBase]: 3632/5771 cut-off events. [2024-06-27 20:36:06,578 INFO L125 PetriNetUnfolderBase]: For 2091046/2091046 co-relation queries the response was YES. [2024-06-27 20:36:06,662 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70981 conditions, 5771 events. 3632/5771 cut-off events. For 2091046/2091046 co-relation queries the response was YES. Maximal size of possible extension queue 370. Compared 35178 event pairs, 807 based on Foata normal form. 2/5766 useless extension candidates. Maximal degree in co-relation 70775. Up to 5208 conditions per place. [2024-06-27 20:36:06,695 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 554 selfloop transitions, 19 changer transitions 0/618 dead transitions. [2024-06-27 20:36:06,696 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 443 places, 618 transitions, 8572 flow [2024-06-27 20:36:06,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:36:06,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:36:06,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 161 transitions. [2024-06-27 20:36:06,697 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42592592592592593 [2024-06-27 20:36:06,697 INFO L175 Difference]: Start difference. First operand has 435 places, 597 transitions, 7292 flow. Second operand 9 states and 161 transitions. [2024-06-27 20:36:06,697 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 443 places, 618 transitions, 8572 flow [2024-06-27 20:36:13,302 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 436 places, 618 transitions, 8461 flow, removed 40 selfloop flow, removed 7 redundant places. [2024-06-27 20:36:13,309 INFO L231 Difference]: Finished difference. Result has 437 places, 599 transitions, 7316 flow [2024-06-27 20:36:13,309 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7181, PETRI_DIFFERENCE_MINUEND_PLACES=428, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=597, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=578, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7316, PETRI_PLACES=437, PETRI_TRANSITIONS=599} [2024-06-27 20:36:13,309 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 394 predicate places. [2024-06-27 20:36:13,309 INFO L495 AbstractCegarLoop]: Abstraction has has 437 places, 599 transitions, 7316 flow [2024-06-27 20:36:13,309 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 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) [2024-06-27 20:36:13,310 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:36:13,310 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:36:13,310 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable159 [2024-06-27 20:36:13,310 INFO L420 AbstractCegarLoop]: === Iteration 161 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:36:13,311 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:36:13,311 INFO L85 PathProgramCache]: Analyzing trace with hash -1188867342, now seen corresponding path program 3 times [2024-06-27 20:36:13,311 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:36:13,311 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1360684183] [2024-06-27 20:36:13,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:36:13,311 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:36:13,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:36:14,198 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:36:14,198 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:36:14,199 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1360684183] [2024-06-27 20:36:14,201 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1360684183] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:36:14,201 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:36:14,201 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:36:14,206 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2000419936] [2024-06-27 20:36:14,206 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:36:14,207 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:36:14,207 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:36:14,207 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:36:14,207 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:36:14,319 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-27 20:36:14,319 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 437 places, 599 transitions, 7316 flow. Second operand has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 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) [2024-06-27 20:36:14,319 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:36:14,319 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-27 20:36:14,319 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:36:15,979 INFO L124 PetriNetUnfolderBase]: 3640/5783 cut-off events. [2024-06-27 20:36:15,979 INFO L125 PetriNetUnfolderBase]: For 2119351/2119351 co-relation queries the response was YES. [2024-06-27 20:36:16,046 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71273 conditions, 5783 events. 3640/5783 cut-off events. For 2119351/2119351 co-relation queries the response was YES. Maximal size of possible extension queue 372. Compared 35318 event pairs, 805 based on Foata normal form. 2/5778 useless extension candidates. Maximal degree in co-relation 71066. Up to 5206 conditions per place. [2024-06-27 20:36:16,074 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 554 selfloop transitions, 22 changer transitions 0/621 dead transitions. [2024-06-27 20:36:16,075 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 445 places, 621 transitions, 8608 flow [2024-06-27 20:36:16,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:36:16,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:36:16,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 163 transitions. [2024-06-27 20:36:16,076 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4312169312169312 [2024-06-27 20:36:16,076 INFO L175 Difference]: Start difference. First operand has 437 places, 599 transitions, 7316 flow. Second operand 9 states and 163 transitions. [2024-06-27 20:36:16,076 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 445 places, 621 transitions, 8608 flow [2024-06-27 20:36:22,365 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 438 places, 621 transitions, 8489 flow, removed 42 selfloop flow, removed 7 redundant places. [2024-06-27 20:36:22,372 INFO L231 Difference]: Finished difference. Result has 439 places, 601 transitions, 7342 flow [2024-06-27 20:36:22,372 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7197, PETRI_DIFFERENCE_MINUEND_PLACES=430, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=599, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=577, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7342, PETRI_PLACES=439, PETRI_TRANSITIONS=601} [2024-06-27 20:36:22,372 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 396 predicate places. [2024-06-27 20:36:22,372 INFO L495 AbstractCegarLoop]: Abstraction has has 439 places, 601 transitions, 7342 flow [2024-06-27 20:36:22,372 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 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) [2024-06-27 20:36:22,373 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:36:22,373 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:36:22,373 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable160 [2024-06-27 20:36:22,373 INFO L420 AbstractCegarLoop]: === Iteration 162 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:36:22,373 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:36:22,373 INFO L85 PathProgramCache]: Analyzing trace with hash -1749484452, now seen corresponding path program 4 times [2024-06-27 20:36:22,373 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:36:22,373 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2022452140] [2024-06-27 20:36:22,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:36:22,374 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:36:22,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:36:23,370 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:36:23,371 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:36:23,371 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2022452140] [2024-06-27 20:36:23,371 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2022452140] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:36:23,371 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:36:23,371 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:36:23,371 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1060821523] [2024-06-27 20:36:23,371 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:36:23,372 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:36:23,372 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:36:23,372 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:36:23,372 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:36:23,521 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-27 20:36:23,522 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 439 places, 601 transitions, 7342 flow. Second operand has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 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) [2024-06-27 20:36:23,522 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:36:23,522 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-27 20:36:23,522 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:36:25,025 INFO L124 PetriNetUnfolderBase]: 3653/5806 cut-off events. [2024-06-27 20:36:25,025 INFO L125 PetriNetUnfolderBase]: For 2144464/2144464 co-relation queries the response was YES. [2024-06-27 20:36:25,100 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71639 conditions, 5806 events. 3653/5806 cut-off events. For 2144464/2144464 co-relation queries the response was YES. Maximal size of possible extension queue 377. Compared 35588 event pairs, 803 based on Foata normal form. 2/5797 useless extension candidates. Maximal degree in co-relation 71431. Up to 5224 conditions per place. [2024-06-27 20:36:25,132 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 548 selfloop transitions, 30 changer transitions 0/623 dead transitions. [2024-06-27 20:36:25,132 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 447 places, 623 transitions, 8682 flow [2024-06-27 20:36:25,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:36:25,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:36:25,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 161 transitions. [2024-06-27 20:36:25,133 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42592592592592593 [2024-06-27 20:36:25,133 INFO L175 Difference]: Start difference. First operand has 439 places, 601 transitions, 7342 flow. Second operand 9 states and 161 transitions. [2024-06-27 20:36:25,134 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 447 places, 623 transitions, 8682 flow [2024-06-27 20:36:32,361 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 440 places, 623 transitions, 8553 flow, removed 44 selfloop flow, removed 7 redundant places. [2024-06-27 20:36:32,368 INFO L231 Difference]: Finished difference. Result has 442 places, 607 transitions, 7440 flow [2024-06-27 20:36:32,368 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7213, PETRI_DIFFERENCE_MINUEND_PLACES=432, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=601, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=574, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7440, PETRI_PLACES=442, PETRI_TRANSITIONS=607} [2024-06-27 20:36:32,368 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 399 predicate places. [2024-06-27 20:36:32,368 INFO L495 AbstractCegarLoop]: Abstraction has has 442 places, 607 transitions, 7440 flow [2024-06-27 20:36:32,368 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 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) [2024-06-27 20:36:32,368 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:36:32,368 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:36:32,369 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable161 [2024-06-27 20:36:32,369 INFO L420 AbstractCegarLoop]: === Iteration 163 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:36:32,369 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:36:32,369 INFO L85 PathProgramCache]: Analyzing trace with hash -1909660498, now seen corresponding path program 5 times [2024-06-27 20:36:32,369 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:36:32,369 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1068788368] [2024-06-27 20:36:32,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:36:32,369 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:36:32,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:36:33,374 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:36:33,374 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:36:33,374 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1068788368] [2024-06-27 20:36:33,374 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1068788368] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:36:33,374 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:36:33,374 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:36:33,374 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1932601036] [2024-06-27 20:36:33,375 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:36:33,375 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:36:33,375 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:36:33,375 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:36:33,375 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:36:33,529 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-27 20:36:33,529 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 442 places, 607 transitions, 7440 flow. Second operand has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 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) [2024-06-27 20:36:33,529 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:36:33,529 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-27 20:36:33,529 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:36:35,062 INFO L124 PetriNetUnfolderBase]: 3661/5818 cut-off events. [2024-06-27 20:36:35,062 INFO L125 PetriNetUnfolderBase]: For 2171208/2171208 co-relation queries the response was YES. [2024-06-27 20:36:35,138 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72305 conditions, 5818 events. 3661/5818 cut-off events. For 2171208/2171208 co-relation queries the response was YES. Maximal size of possible extension queue 379. Compared 35630 event pairs, 805 based on Foata normal form. 2/5809 useless extension candidates. Maximal degree in co-relation 72095. Up to 5251 conditions per place. [2024-06-27 20:36:35,171 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 558 selfloop transitions, 24 changer transitions 0/627 dead transitions. [2024-06-27 20:36:35,171 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 450 places, 627 transitions, 8772 flow [2024-06-27 20:36:35,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:36:35,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:36:35,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 160 transitions. [2024-06-27 20:36:35,172 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42328042328042326 [2024-06-27 20:36:35,172 INFO L175 Difference]: Start difference. First operand has 442 places, 607 transitions, 7440 flow. Second operand 9 states and 160 transitions. [2024-06-27 20:36:35,172 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 450 places, 627 transitions, 8772 flow [2024-06-27 20:36:42,661 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 445 places, 627 transitions, 8623 flow, removed 52 selfloop flow, removed 5 redundant places. [2024-06-27 20:36:42,667 INFO L231 Difference]: Finished difference. Result has 446 places, 611 transitions, 7478 flow [2024-06-27 20:36:42,668 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7293, PETRI_DIFFERENCE_MINUEND_PLACES=437, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=607, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=585, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7478, PETRI_PLACES=446, PETRI_TRANSITIONS=611} [2024-06-27 20:36:42,668 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 403 predicate places. [2024-06-27 20:36:42,668 INFO L495 AbstractCegarLoop]: Abstraction has has 446 places, 611 transitions, 7478 flow [2024-06-27 20:36:42,668 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 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) [2024-06-27 20:36:42,668 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:36:42,669 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:36:42,669 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable162 [2024-06-27 20:36:42,669 INFO L420 AbstractCegarLoop]: === Iteration 164 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:36:42,669 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:36:42,669 INFO L85 PathProgramCache]: Analyzing trace with hash -1754994702, now seen corresponding path program 6 times [2024-06-27 20:36:42,669 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:36:42,670 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1663119552] [2024-06-27 20:36:42,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:36:42,670 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:36:42,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:36:43,601 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:36:43,601 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:36:43,601 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1663119552] [2024-06-27 20:36:43,601 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1663119552] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:36:43,601 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:36:43,601 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:36:43,602 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1599395315] [2024-06-27 20:36:43,602 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:36:43,602 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:36:43,602 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:36:43,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:36:43,602 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:36:43,687 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-27 20:36:43,687 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 446 places, 611 transitions, 7478 flow. Second operand has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 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) [2024-06-27 20:36:43,687 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:36:43,687 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-27 20:36:43,687 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:36:45,497 INFO L124 PetriNetUnfolderBase]: 3669/5830 cut-off events. [2024-06-27 20:36:45,498 INFO L125 PetriNetUnfolderBase]: For 2196013/2196013 co-relation queries the response was YES. [2024-06-27 20:36:45,565 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72582 conditions, 5830 events. 3669/5830 cut-off events. For 2196013/2196013 co-relation queries the response was YES. Maximal size of possible extension queue 381. Compared 35662 event pairs, 803 based on Foata normal form. 2/5821 useless extension candidates. Maximal degree in co-relation 72371. Up to 5243 conditions per place. [2024-06-27 20:36:45,595 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 556 selfloop transitions, 29 changer transitions 0/630 dead transitions. [2024-06-27 20:36:45,595 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 454 places, 630 transitions, 8792 flow [2024-06-27 20:36:45,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:36:45,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:36:45,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 161 transitions. [2024-06-27 20:36:45,596 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42592592592592593 [2024-06-27 20:36:45,596 INFO L175 Difference]: Start difference. First operand has 446 places, 611 transitions, 7478 flow. Second operand 9 states and 161 transitions. [2024-06-27 20:36:45,596 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 454 places, 630 transitions, 8792 flow [2024-06-27 20:36:53,331 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 449 places, 630 transitions, 8661 flow, removed 48 selfloop flow, removed 5 redundant places. [2024-06-27 20:36:53,337 INFO L231 Difference]: Finished difference. Result has 450 places, 613 transitions, 7518 flow [2024-06-27 20:36:53,337 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7347, PETRI_DIFFERENCE_MINUEND_PLACES=441, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=611, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=582, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7518, PETRI_PLACES=450, PETRI_TRANSITIONS=613} [2024-06-27 20:36:53,341 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 407 predicate places. [2024-06-27 20:36:53,341 INFO L495 AbstractCegarLoop]: Abstraction has has 450 places, 613 transitions, 7518 flow [2024-06-27 20:36:53,341 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 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) [2024-06-27 20:36:53,341 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:36:53,341 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:36:53,341 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable163 [2024-06-27 20:36:53,341 INFO L420 AbstractCegarLoop]: === Iteration 165 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:36:53,341 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:36:53,342 INFO L85 PathProgramCache]: Analyzing trace with hash -1200910289, now seen corresponding path program 1 times [2024-06-27 20:36:53,342 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:36:53,342 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2130667199] [2024-06-27 20:36:53,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:36:53,342 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:36:53,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:36:54,444 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:36:54,444 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:36:54,444 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2130667199] [2024-06-27 20:36:54,444 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2130667199] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:36:54,444 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:36:54,445 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 20:36:54,445 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [456580870] [2024-06-27 20:36:54,445 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:36:54,445 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 20:36:54,445 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:36:54,445 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 20:36:54,445 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2024-06-27 20:36:54,590 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-27 20:36:54,590 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 450 places, 613 transitions, 7518 flow. Second operand has 11 states, 11 states have (on average 11.545454545454545) internal successors, (127), 11 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:36:54,590 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:36:54,590 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-27 20:36:54,590 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:36:56,172 INFO L124 PetriNetUnfolderBase]: 3838/6004 cut-off events. [2024-06-27 20:36:56,172 INFO L125 PetriNetUnfolderBase]: For 2200178/2200178 co-relation queries the response was YES. [2024-06-27 20:36:56,252 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73851 conditions, 6004 events. 3838/6004 cut-off events. For 2200178/2200178 co-relation queries the response was YES. Maximal size of possible extension queue 380. Compared 35923 event pairs, 864 based on Foata normal form. 1/6003 useless extension candidates. Maximal degree in co-relation 73639. Up to 5686 conditions per place. [2024-06-27 20:36:56,285 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 610 selfloop transitions, 23 changer transitions 0/638 dead transitions. [2024-06-27 20:36:56,285 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 459 places, 638 transitions, 8983 flow [2024-06-27 20:36:56,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:36:56,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:36:56,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 164 transitions. [2024-06-27 20:36:56,286 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3904761904761905 [2024-06-27 20:36:56,286 INFO L175 Difference]: Start difference. First operand has 450 places, 613 transitions, 7518 flow. Second operand 10 states and 164 transitions. [2024-06-27 20:36:56,286 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 459 places, 638 transitions, 8983 flow [2024-06-27 20:37:04,560 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 452 places, 638 transitions, 8828 flow, removed 50 selfloop flow, removed 7 redundant places. [2024-06-27 20:37:04,567 INFO L231 Difference]: Finished difference. Result has 455 places, 622 transitions, 7598 flow [2024-06-27 20:37:04,567 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7363, PETRI_DIFFERENCE_MINUEND_PLACES=443, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=613, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=592, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7598, PETRI_PLACES=455, PETRI_TRANSITIONS=622} [2024-06-27 20:37:04,568 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 412 predicate places. [2024-06-27 20:37:04,568 INFO L495 AbstractCegarLoop]: Abstraction has has 455 places, 622 transitions, 7598 flow [2024-06-27 20:37:04,568 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.545454545454545) internal successors, (127), 11 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:37:04,568 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:37:04,568 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:37:04,568 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable164 [2024-06-27 20:37:04,568 INFO L420 AbstractCegarLoop]: === Iteration 166 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:37:04,569 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:37:04,569 INFO L85 PathProgramCache]: Analyzing trace with hash -724024228, now seen corresponding path program 7 times [2024-06-27 20:37:04,569 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:37:04,569 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1538256562] [2024-06-27 20:37:04,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:37:04,570 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:37:04,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:37:05,564 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:37:05,564 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:37:05,564 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1538256562] [2024-06-27 20:37:05,564 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1538256562] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:37:05,564 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:37:05,564 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:37:05,565 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [804035934] [2024-06-27 20:37:05,565 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:37:05,565 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:37:05,565 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:37:05,565 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:37:05,565 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:37:05,743 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-27 20:37:05,743 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 455 places, 622 transitions, 7598 flow. Second operand has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 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) [2024-06-27 20:37:05,743 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:37:05,743 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-27 20:37:05,743 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:37:07,411 INFO L124 PetriNetUnfolderBase]: 3689/5862 cut-off events. [2024-06-27 20:37:07,412 INFO L125 PetriNetUnfolderBase]: For 2260332/2260335 co-relation queries the response was YES. [2024-06-27 20:37:07,482 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73716 conditions, 5862 events. 3689/5862 cut-off events. For 2260332/2260335 co-relation queries the response was YES. Maximal size of possible extension queue 386. Compared 35951 event pairs, 796 based on Foata normal form. 4/5845 useless extension candidates. Maximal degree in co-relation 73501. Up to 5265 conditions per place. [2024-06-27 20:37:07,513 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 554 selfloop transitions, 41 changer transitions 0/641 dead transitions. [2024-06-27 20:37:07,513 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 463 places, 641 transitions, 8988 flow [2024-06-27 20:37:07,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:37:07,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:37:07,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 160 transitions. [2024-06-27 20:37:07,514 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42328042328042326 [2024-06-27 20:37:07,514 INFO L175 Difference]: Start difference. First operand has 455 places, 622 transitions, 7598 flow. Second operand 9 states and 160 transitions. [2024-06-27 20:37:07,514 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 463 places, 641 transitions, 8988 flow [2024-06-27 20:37:15,817 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 455 places, 641 transitions, 8828 flow, removed 57 selfloop flow, removed 8 redundant places. [2024-06-27 20:37:15,823 INFO L231 Difference]: Finished difference. Result has 457 places, 627 transitions, 7689 flow [2024-06-27 20:37:15,824 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7442, PETRI_DIFFERENCE_MINUEND_PLACES=447, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=622, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=583, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7689, PETRI_PLACES=457, PETRI_TRANSITIONS=627} [2024-06-27 20:37:15,824 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 414 predicate places. [2024-06-27 20:37:15,824 INFO L495 AbstractCegarLoop]: Abstraction has has 457 places, 627 transitions, 7689 flow [2024-06-27 20:37:15,824 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 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) [2024-06-27 20:37:15,824 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:37:15,824 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:37:15,824 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable165 [2024-06-27 20:37:15,825 INFO L420 AbstractCegarLoop]: === Iteration 167 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:37:15,825 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:37:15,825 INFO L85 PathProgramCache]: Analyzing trace with hash -1069814640, now seen corresponding path program 8 times [2024-06-27 20:37:15,825 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:37:15,825 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [498149010] [2024-06-27 20:37:15,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:37:15,825 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:37:15,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:37:16,728 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:37:16,728 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:37:16,728 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [498149010] [2024-06-27 20:37:16,729 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [498149010] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:37:16,729 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:37:16,729 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:37:16,729 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [805672380] [2024-06-27 20:37:16,729 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:37:16,729 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:37:16,729 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:37:16,730 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:37:16,730 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:37:16,823 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-27 20:37:16,823 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 457 places, 627 transitions, 7689 flow. Second operand has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 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) [2024-06-27 20:37:16,823 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:37:16,823 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-27 20:37:16,824 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:37:18,488 INFO L124 PetriNetUnfolderBase]: 3702/5883 cut-off events. [2024-06-27 20:37:18,488 INFO L125 PetriNetUnfolderBase]: For 2288411/2288414 co-relation queries the response was YES. [2024-06-27 20:37:18,579 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74249 conditions, 5883 events. 3702/5883 cut-off events. For 2288411/2288414 co-relation queries the response was YES. Maximal size of possible extension queue 388. Compared 36079 event pairs, 798 based on Foata normal form. 4/5866 useless extension candidates. Maximal degree in co-relation 74032. Up to 5283 conditions per place. [2024-06-27 20:37:18,614 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 557 selfloop transitions, 45 changer transitions 0/648 dead transitions. [2024-06-27 20:37:18,614 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 465 places, 648 transitions, 9125 flow [2024-06-27 20:37:18,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:37:18,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:37:18,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 161 transitions. [2024-06-27 20:37:18,615 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42592592592592593 [2024-06-27 20:37:18,615 INFO L175 Difference]: Start difference. First operand has 457 places, 627 transitions, 7689 flow. Second operand 9 states and 161 transitions. [2024-06-27 20:37:18,615 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 465 places, 648 transitions, 9125 flow [2024-06-27 20:37:27,100 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 459 places, 648 transitions, 8918 flow, removed 60 selfloop flow, removed 6 redundant places. [2024-06-27 20:37:27,107 INFO L231 Difference]: Finished difference. Result has 461 places, 635 transitions, 7795 flow [2024-06-27 20:37:27,108 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7492, PETRI_DIFFERENCE_MINUEND_PLACES=451, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=627, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=587, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7795, PETRI_PLACES=461, PETRI_TRANSITIONS=635} [2024-06-27 20:37:27,108 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 418 predicate places. [2024-06-27 20:37:27,108 INFO L495 AbstractCegarLoop]: Abstraction has has 461 places, 635 transitions, 7795 flow [2024-06-27 20:37:27,108 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 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) [2024-06-27 20:37:27,108 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:37:27,108 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:37:27,108 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable166 [2024-06-27 20:37:27,109 INFO L420 AbstractCegarLoop]: === Iteration 168 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:37:27,109 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:37:27,109 INFO L85 PathProgramCache]: Analyzing trace with hash 795464464, now seen corresponding path program 9 times [2024-06-27 20:37:27,109 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:37:27,109 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1570792532] [2024-06-27 20:37:27,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:37:27,110 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:37:27,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:37:27,974 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:37:27,974 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:37:27,974 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1570792532] [2024-06-27 20:37:27,974 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1570792532] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:37:27,974 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:37:27,974 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:37:27,974 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1692445158] [2024-06-27 20:37:27,975 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:37:27,975 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:37:27,975 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:37:27,975 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:37:27,975 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:37:28,102 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-27 20:37:28,103 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 461 places, 635 transitions, 7795 flow. Second operand has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 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) [2024-06-27 20:37:28,103 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:37:28,103 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-27 20:37:28,103 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:37:30,008 INFO L124 PetriNetUnfolderBase]: 3710/5895 cut-off events. [2024-06-27 20:37:30,009 INFO L125 PetriNetUnfolderBase]: For 2317004/2317007 co-relation queries the response was YES. [2024-06-27 20:37:30,087 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74883 conditions, 5895 events. 3710/5895 cut-off events. For 2317004/2317007 co-relation queries the response was YES. Maximal size of possible extension queue 390. Compared 36219 event pairs, 796 based on Foata normal form. 4/5878 useless extension candidates. Maximal degree in co-relation 74664. Up to 5266 conditions per place. [2024-06-27 20:37:30,120 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 556 selfloop transitions, 52 changer transitions 0/654 dead transitions. [2024-06-27 20:37:30,121 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 469 places, 654 transitions, 9613 flow [2024-06-27 20:37:30,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:37:30,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:37:30,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 163 transitions. [2024-06-27 20:37:30,122 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4312169312169312 [2024-06-27 20:37:30,122 INFO L175 Difference]: Start difference. First operand has 461 places, 635 transitions, 7795 flow. Second operand 9 states and 163 transitions. [2024-06-27 20:37:30,122 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 469 places, 654 transitions, 9613 flow [2024-06-27 20:37:38,901 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 465 places, 654 transitions, 9426 flow, removed 63 selfloop flow, removed 4 redundant places. [2024-06-27 20:37:38,909 INFO L231 Difference]: Finished difference. Result has 466 places, 639 transitions, 7957 flow [2024-06-27 20:37:38,909 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7608, PETRI_DIFFERENCE_MINUEND_PLACES=457, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=635, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=585, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7957, PETRI_PLACES=466, PETRI_TRANSITIONS=639} [2024-06-27 20:37:38,910 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 423 predicate places. [2024-06-27 20:37:38,910 INFO L495 AbstractCegarLoop]: Abstraction has has 466 places, 639 transitions, 7957 flow [2024-06-27 20:37:38,910 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 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) [2024-06-27 20:37:38,910 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:37:38,910 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:37:38,910 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable167 [2024-06-27 20:37:38,910 INFO L420 AbstractCegarLoop]: === Iteration 169 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:37:38,910 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:37:38,911 INFO L85 PathProgramCache]: Analyzing trace with hash 800974714, now seen corresponding path program 10 times [2024-06-27 20:37:38,911 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:37:38,911 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [729539740] [2024-06-27 20:37:38,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:37:38,911 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:37:38,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:37:39,935 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:37:39,935 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:37:39,935 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [729539740] [2024-06-27 20:37:39,935 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [729539740] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:37:39,935 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:37:39,935 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:37:39,935 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [374108243] [2024-06-27 20:37:39,935 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:37:39,936 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:37:39,936 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:37:39,936 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:37:39,936 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:37:40,043 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-27 20:37:40,043 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 466 places, 639 transitions, 7957 flow. Second operand has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 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) [2024-06-27 20:37:40,044 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:37:40,044 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-27 20:37:40,044 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:37:41,637 INFO L124 PetriNetUnfolderBase]: 3705/5889 cut-off events. [2024-06-27 20:37:41,637 INFO L125 PetriNetUnfolderBase]: For 2308282/2308282 co-relation queries the response was YES. [2024-06-27 20:37:41,720 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73821 conditions, 5889 events. 3705/5889 cut-off events. For 2308282/2308282 co-relation queries the response was YES. Maximal size of possible extension queue 391. Compared 36172 event pairs, 801 based on Foata normal form. 2/5868 useless extension candidates. Maximal degree in co-relation 73601. Up to 5273 conditions per place. [2024-06-27 20:37:41,755 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 555 selfloop transitions, 51 changer transitions 0/652 dead transitions. [2024-06-27 20:37:41,755 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 474 places, 652 transitions, 9199 flow [2024-06-27 20:37:41,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:37:41,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:37:41,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 163 transitions. [2024-06-27 20:37:41,756 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4312169312169312 [2024-06-27 20:37:41,756 INFO L175 Difference]: Start difference. First operand has 466 places, 639 transitions, 7957 flow. Second operand 9 states and 163 transitions. [2024-06-27 20:37:41,756 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 474 places, 652 transitions, 9199 flow [2024-06-27 20:37:50,485 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 469 places, 652 transitions, 8931 flow, removed 109 selfloop flow, removed 5 redundant places. [2024-06-27 20:37:50,492 INFO L231 Difference]: Finished difference. Result has 470 places, 639 transitions, 7796 flow [2024-06-27 20:37:50,492 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7689, PETRI_DIFFERENCE_MINUEND_PLACES=461, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=639, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=588, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7796, PETRI_PLACES=470, PETRI_TRANSITIONS=639} [2024-06-27 20:37:50,492 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 427 predicate places. [2024-06-27 20:37:50,492 INFO L495 AbstractCegarLoop]: Abstraction has has 470 places, 639 transitions, 7796 flow [2024-06-27 20:37:50,492 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 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) [2024-06-27 20:37:50,492 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:37:50,493 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:37:50,493 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable168 [2024-06-27 20:37:50,493 INFO L420 AbstractCegarLoop]: === Iteration 170 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:37:50,493 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:37:50,493 INFO L85 PathProgramCache]: Analyzing trace with hash 995129605, now seen corresponding path program 2 times [2024-06-27 20:37:50,493 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:37:50,494 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1673222900] [2024-06-27 20:37:50,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:37:50,494 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:37:50,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:37:51,547 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:37:51,547 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:37:51,547 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1673222900] [2024-06-27 20:37:51,547 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1673222900] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:37:51,547 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:37:51,548 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 20:37:51,548 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1620324914] [2024-06-27 20:37:51,548 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:37:51,548 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 20:37:51,548 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:37:51,548 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 20:37:51,548 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2024-06-27 20:37:51,650 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-27 20:37:51,651 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 470 places, 639 transitions, 7796 flow. Second operand has 11 states, 11 states have (on average 11.545454545454545) internal successors, (127), 11 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:37:51,651 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:37:51,651 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-27 20:37:51,651 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:37:53,431 INFO L124 PetriNetUnfolderBase]: 3872/6069 cut-off events. [2024-06-27 20:37:53,432 INFO L125 PetriNetUnfolderBase]: For 2308149/2308152 co-relation queries the response was YES. [2024-06-27 20:37:53,529 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74716 conditions, 6069 events. 3872/6069 cut-off events. For 2308149/2308152 co-relation queries the response was YES. Maximal size of possible extension queue 392. Compared 36536 event pairs, 851 based on Foata normal form. 4/6070 useless extension candidates. Maximal degree in co-relation 74494. Up to 5629 conditions per place. [2024-06-27 20:37:53,564 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 586 selfloop transitions, 69 changer transitions 0/660 dead transitions. [2024-06-27 20:37:53,565 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 479 places, 660 transitions, 9362 flow [2024-06-27 20:37:53,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:37:53,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:37:53,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 174 transitions. [2024-06-27 20:37:53,566 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4142857142857143 [2024-06-27 20:37:53,566 INFO L175 Difference]: Start difference. First operand has 470 places, 639 transitions, 7796 flow. Second operand 10 states and 174 transitions. [2024-06-27 20:37:53,566 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 479 places, 660 transitions, 9362 flow [2024-06-27 20:38:04,293 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 469 places, 660 transitions, 9219 flow, removed 7 selfloop flow, removed 10 redundant places. [2024-06-27 20:38:04,300 INFO L231 Difference]: Finished difference. Result has 470 places, 643 transitions, 7968 flow [2024-06-27 20:38:04,301 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7653, PETRI_DIFFERENCE_MINUEND_PLACES=460, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=639, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=570, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7968, PETRI_PLACES=470, PETRI_TRANSITIONS=643} [2024-06-27 20:38:04,301 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 427 predicate places. [2024-06-27 20:38:04,301 INFO L495 AbstractCegarLoop]: Abstraction has has 470 places, 643 transitions, 7968 flow [2024-06-27 20:38:04,301 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.545454545454545) internal successors, (127), 11 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:38:04,301 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:38:04,301 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:38:04,301 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable169 [2024-06-27 20:38:04,301 INFO L420 AbstractCegarLoop]: === Iteration 171 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:38:04,302 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:38:04,302 INFO L85 PathProgramCache]: Analyzing trace with hash -457785037, now seen corresponding path program 3 times [2024-06-27 20:38:04,302 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:38:04,302 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [989615834] [2024-06-27 20:38:04,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:38:04,303 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:38:04,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:38:05,299 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:38:05,300 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:38:05,300 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [989615834] [2024-06-27 20:38:05,300 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [989615834] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:38:05,300 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:38:05,300 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 20:38:05,300 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1446738331] [2024-06-27 20:38:05,300 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:38:05,301 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 20:38:05,301 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:38:05,301 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 20:38:05,301 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-06-27 20:38:05,420 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-27 20:38:05,421 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 470 places, 643 transitions, 7968 flow. Second operand has 11 states, 11 states have (on average 11.545454545454545) internal successors, (127), 11 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:38:05,421 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:38:05,421 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-27 20:38:05,421 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:38:07,077 INFO L124 PetriNetUnfolderBase]: 3877/6074 cut-off events. [2024-06-27 20:38:07,078 INFO L125 PetriNetUnfolderBase]: For 2325033/2325036 co-relation queries the response was YES. [2024-06-27 20:38:07,169 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75675 conditions, 6074 events. 3877/6074 cut-off events. For 2325033/2325036 co-relation queries the response was YES. Maximal size of possible extension queue 392. Compared 36544 event pairs, 851 based on Foata normal form. 3/6074 useless extension candidates. Maximal degree in co-relation 75454. Up to 5687 conditions per place. [2024-06-27 20:38:07,204 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 609 selfloop transitions, 65 changer transitions 0/679 dead transitions. [2024-06-27 20:38:07,205 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 479 places, 679 transitions, 10162 flow [2024-06-27 20:38:07,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:38:07,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:38:07,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 168 transitions. [2024-06-27 20:38:07,205 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4 [2024-06-27 20:38:07,206 INFO L175 Difference]: Start difference. First operand has 470 places, 643 transitions, 7968 flow. Second operand 10 states and 168 transitions. [2024-06-27 20:38:07,206 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 479 places, 679 transitions, 10162 flow [2024-06-27 20:38:17,019 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 470 places, 679 transitions, 9681 flow, removed 115 selfloop flow, removed 9 redundant places. [2024-06-27 20:38:17,026 INFO L231 Difference]: Finished difference. Result has 474 places, 665 transitions, 8183 flow [2024-06-27 20:38:17,026 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7588, PETRI_DIFFERENCE_MINUEND_PLACES=461, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=643, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=583, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=8183, PETRI_PLACES=474, PETRI_TRANSITIONS=665} [2024-06-27 20:38:17,026 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 431 predicate places. [2024-06-27 20:38:17,027 INFO L495 AbstractCegarLoop]: Abstraction has has 474 places, 665 transitions, 8183 flow [2024-06-27 20:38:17,027 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.545454545454545) internal successors, (127), 11 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:38:17,027 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:38:17,027 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:38:17,027 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable170 [2024-06-27 20:38:17,027 INFO L420 AbstractCegarLoop]: === Iteration 172 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:38:17,027 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:38:17,028 INFO L85 PathProgramCache]: Analyzing trace with hash 801190195, now seen corresponding path program 4 times [2024-06-27 20:38:17,028 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:38:17,028 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [186901457] [2024-06-27 20:38:17,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:38:17,028 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:38:17,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:38:17,989 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:38:17,989 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:38:17,989 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [186901457] [2024-06-27 20:38:17,989 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [186901457] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:38:17,989 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:38:17,989 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 20:38:17,989 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [626379650] [2024-06-27 20:38:17,989 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:38:17,989 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 20:38:17,989 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:38:17,990 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 20:38:17,990 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2024-06-27 20:38:18,116 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-27 20:38:18,117 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 474 places, 665 transitions, 8183 flow. Second operand has 11 states, 11 states have (on average 11.545454545454545) internal successors, (127), 11 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:38:18,117 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:38:18,117 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-27 20:38:18,117 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:38:19,814 INFO L124 PetriNetUnfolderBase]: 3882/6081 cut-off events. [2024-06-27 20:38:19,814 INFO L125 PetriNetUnfolderBase]: For 2351719/2351722 co-relation queries the response was YES. [2024-06-27 20:38:19,902 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76215 conditions, 6081 events. 3882/6081 cut-off events. For 2351719/2351722 co-relation queries the response was YES. Maximal size of possible extension queue 393. Compared 36623 event pairs, 851 based on Foata normal form. 3/6081 useless extension candidates. Maximal degree in co-relation 75990. Up to 5709 conditions per place. [2024-06-27 20:38:19,936 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 628 selfloop transitions, 50 changer transitions 0/683 dead transitions. [2024-06-27 20:38:19,936 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 483 places, 683 transitions, 9722 flow [2024-06-27 20:38:19,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:38:19,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:38:19,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 169 transitions. [2024-06-27 20:38:19,937 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4023809523809524 [2024-06-27 20:38:19,937 INFO L175 Difference]: Start difference. First operand has 474 places, 665 transitions, 8183 flow. Second operand 10 states and 169 transitions. [2024-06-27 20:38:19,937 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 483 places, 683 transitions, 9722 flow [2024-06-27 20:38:30,551 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 479 places, 683 transitions, 9498 flow, removed 98 selfloop flow, removed 4 redundant places. [2024-06-27 20:38:30,558 INFO L231 Difference]: Finished difference. Result has 480 places, 670 transitions, 8224 flow [2024-06-27 20:38:30,558 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8007, PETRI_DIFFERENCE_MINUEND_PLACES=470, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=665, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=617, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=8224, PETRI_PLACES=480, PETRI_TRANSITIONS=670} [2024-06-27 20:38:30,559 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 437 predicate places. [2024-06-27 20:38:30,559 INFO L495 AbstractCegarLoop]: Abstraction has has 480 places, 670 transitions, 8224 flow [2024-06-27 20:38:30,559 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.545454545454545) internal successors, (127), 11 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:38:30,559 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:38:30,559 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:38:30,559 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable171 [2024-06-27 20:38:30,559 INFO L420 AbstractCegarLoop]: === Iteration 173 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:38:30,560 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:38:30,560 INFO L85 PathProgramCache]: Analyzing trace with hash -467308237, now seen corresponding path program 5 times [2024-06-27 20:38:30,560 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:38:30,560 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [143933331] [2024-06-27 20:38:30,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:38:30,560 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:38:30,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:38:31,499 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:38:31,499 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:38:31,499 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [143933331] [2024-06-27 20:38:31,499 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [143933331] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:38:31,499 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:38:31,499 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 20:38:31,499 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1304227685] [2024-06-27 20:38:31,499 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:38:31,499 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 20:38:31,499 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:38:31,500 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 20:38:31,500 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2024-06-27 20:38:31,614 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-27 20:38:31,614 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 480 places, 670 transitions, 8224 flow. Second operand has 11 states, 11 states have (on average 11.545454545454545) internal successors, (127), 11 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:38:31,614 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:38:31,614 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-27 20:38:31,614 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:38:33,259 INFO L124 PetriNetUnfolderBase]: 3892/6093 cut-off events. [2024-06-27 20:38:33,259 INFO L125 PetriNetUnfolderBase]: For 2370384/2370387 co-relation queries the response was YES. [2024-06-27 20:38:33,351 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75687 conditions, 6093 events. 3892/6093 cut-off events. For 2370384/2370387 co-relation queries the response was YES. Maximal size of possible extension queue 393. Compared 36638 event pairs, 851 based on Foata normal form. 3/6093 useless extension candidates. Maximal degree in co-relation 75461. Up to 5722 conditions per place. [2024-06-27 20:38:33,387 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 628 selfloop transitions, 58 changer transitions 0/691 dead transitions. [2024-06-27 20:38:33,387 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 489 places, 691 transitions, 9780 flow [2024-06-27 20:38:33,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:38:33,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:38:33,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 167 transitions. [2024-06-27 20:38:33,388 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3976190476190476 [2024-06-27 20:38:33,388 INFO L175 Difference]: Start difference. First operand has 480 places, 670 transitions, 8224 flow. Second operand 10 states and 167 transitions. [2024-06-27 20:38:33,388 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 489 places, 691 transitions, 9780 flow [2024-06-27 20:38:44,436 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 482 places, 691 transitions, 9586 flow, removed 45 selfloop flow, removed 7 redundant places. [2024-06-27 20:38:44,443 INFO L231 Difference]: Finished difference. Result has 483 places, 678 transitions, 8312 flow [2024-06-27 20:38:44,443 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8041, PETRI_DIFFERENCE_MINUEND_PLACES=473, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=670, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=617, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=8312, PETRI_PLACES=483, PETRI_TRANSITIONS=678} [2024-06-27 20:38:44,443 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 440 predicate places. [2024-06-27 20:38:44,443 INFO L495 AbstractCegarLoop]: Abstraction has has 483 places, 678 transitions, 8312 flow [2024-06-27 20:38:44,444 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.545454545454545) internal successors, (127), 11 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:38:44,444 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:38:44,444 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:38:44,444 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable172 [2024-06-27 20:38:44,444 INFO L420 AbstractCegarLoop]: === Iteration 174 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:38:44,444 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:38:44,444 INFO L85 PathProgramCache]: Analyzing trace with hash -458111467, now seen corresponding path program 6 times [2024-06-27 20:38:44,445 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:38:44,445 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2131024747] [2024-06-27 20:38:44,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:38:44,445 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:38:44,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:38:45,407 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:38:45,408 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:38:45,408 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2131024747] [2024-06-27 20:38:45,408 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2131024747] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:38:45,408 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:38:45,408 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 20:38:45,408 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1471085474] [2024-06-27 20:38:45,408 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:38:45,408 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 20:38:45,408 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:38:45,408 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 20:38:45,408 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2024-06-27 20:38:45,510 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-27 20:38:45,510 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 483 places, 678 transitions, 8312 flow. Second operand has 11 states, 11 states have (on average 11.545454545454545) internal successors, (127), 11 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:38:45,510 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:38:45,510 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-27 20:38:45,510 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:38:47,203 INFO L124 PetriNetUnfolderBase]: 3899/6106 cut-off events. [2024-06-27 20:38:47,203 INFO L125 PetriNetUnfolderBase]: For 2397167/2397167 co-relation queries the response was YES. [2024-06-27 20:38:47,293 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75756 conditions, 6106 events. 3899/6106 cut-off events. For 2397167/2397167 co-relation queries the response was YES. Maximal size of possible extension queue 397. Compared 36714 event pairs, 855 based on Foata normal form. 2/6103 useless extension candidates. Maximal degree in co-relation 75529. Up to 5642 conditions per place. [2024-06-27 20:38:47,326 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 583 selfloop transitions, 112 changer transitions 0/700 dead transitions. [2024-06-27 20:38:47,326 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 492 places, 700 transitions, 9941 flow [2024-06-27 20:38:47,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:38:47,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:38:47,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 173 transitions. [2024-06-27 20:38:47,327 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4119047619047619 [2024-06-27 20:38:47,327 INFO L175 Difference]: Start difference. First operand has 483 places, 678 transitions, 8312 flow. Second operand 10 states and 173 transitions. [2024-06-27 20:38:47,328 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 492 places, 700 transitions, 9941 flow [2024-06-27 20:38:58,459 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 487 places, 700 transitions, 9725 flow, removed 70 selfloop flow, removed 5 redundant places. [2024-06-27 20:38:58,466 INFO L231 Difference]: Finished difference. Result has 489 places, 687 transitions, 8582 flow [2024-06-27 20:38:58,466 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8096, PETRI_DIFFERENCE_MINUEND_PLACES=478, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=678, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=103, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=571, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=8582, PETRI_PLACES=489, PETRI_TRANSITIONS=687} [2024-06-27 20:38:58,466 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 446 predicate places. [2024-06-27 20:38:58,467 INFO L495 AbstractCegarLoop]: Abstraction has has 489 places, 687 transitions, 8582 flow [2024-06-27 20:38:58,467 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.545454545454545) internal successors, (127), 11 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:38:58,467 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:38:58,467 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] [2024-06-27 20:38:58,467 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable173 [2024-06-27 20:38:58,467 INFO L420 AbstractCegarLoop]: === Iteration 175 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:38:58,468 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:38:58,468 INFO L85 PathProgramCache]: Analyzing trace with hash -586325283, now seen corresponding path program 1 times [2024-06-27 20:38:58,468 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:38:58,468 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1003865337] [2024-06-27 20:38:58,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:38:58,468 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:38:58,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:38:59,026 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:38:59,026 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:38:59,027 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1003865337] [2024-06-27 20:38:59,027 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1003865337] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:38:59,027 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:38:59,027 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:38:59,027 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1483393708] [2024-06-27 20:38:59,027 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:38:59,027 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:38:59,027 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:38:59,028 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:38:59,028 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:38:59,131 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-27 20:38:59,132 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 489 places, 687 transitions, 8582 flow. Second operand has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:38:59,132 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:38:59,132 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-27 20:38:59,132 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:39:00,847 INFO L124 PetriNetUnfolderBase]: 3687/5901 cut-off events. [2024-06-27 20:39:00,847 INFO L125 PetriNetUnfolderBase]: For 2524201/2524205 co-relation queries the response was YES. [2024-06-27 20:39:00,930 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75049 conditions, 5901 events. 3687/5901 cut-off events. For 2524201/2524205 co-relation queries the response was YES. Maximal size of possible extension queue 398. Compared 36624 event pairs, 508 based on Foata normal form. 11/5885 useless extension candidates. Maximal degree in co-relation 74820. Up to 5026 conditions per place. [2024-06-27 20:39:00,976 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 635 selfloop transitions, 24 changer transitions 0/721 dead transitions. [2024-06-27 20:39:00,976 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 496 places, 721 transitions, 10152 flow [2024-06-27 20:39:00,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:39:00,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:39:00,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 158 transitions. [2024-06-27 20:39:00,981 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47023809523809523 [2024-06-27 20:39:00,981 INFO L175 Difference]: Start difference. First operand has 489 places, 687 transitions, 8582 flow. Second operand 8 states and 158 transitions. [2024-06-27 20:39:00,981 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 496 places, 721 transitions, 10152 flow [2024-06-27 20:39:11,409 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 490 places, 721 transitions, 9811 flow, removed 93 selfloop flow, removed 6 redundant places. [2024-06-27 20:39:11,417 INFO L231 Difference]: Finished difference. Result has 493 places, 692 transitions, 8413 flow [2024-06-27 20:39:11,417 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8241, PETRI_DIFFERENCE_MINUEND_PLACES=483, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=687, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=664, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8413, PETRI_PLACES=493, PETRI_TRANSITIONS=692} [2024-06-27 20:39:11,418 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 450 predicate places. [2024-06-27 20:39:11,418 INFO L495 AbstractCegarLoop]: Abstraction has has 493 places, 692 transitions, 8413 flow [2024-06-27 20:39:11,418 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:39:11,418 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:39:11,418 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] [2024-06-27 20:39:11,418 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable174 [2024-06-27 20:39:11,418 INFO L420 AbstractCegarLoop]: === Iteration 176 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:39:11,419 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:39:11,419 INFO L85 PathProgramCache]: Analyzing trace with hash -1198347125, now seen corresponding path program 2 times [2024-06-27 20:39:11,419 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:39:11,419 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [355137522] [2024-06-27 20:39:11,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:39:11,419 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:39:11,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:39:12,019 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:39:12,020 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:39:12,020 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [355137522] [2024-06-27 20:39:12,020 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [355137522] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:39:12,020 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:39:12,020 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:39:12,020 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [415988019] [2024-06-27 20:39:12,020 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:39:12,021 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:39:12,021 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:39:12,021 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:39:12,021 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:39:12,137 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-27 20:39:12,137 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 493 places, 692 transitions, 8413 flow. Second operand has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:39:12,137 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:39:12,137 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-27 20:39:12,137 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:39:14,202 INFO L124 PetriNetUnfolderBase]: 3753/6025 cut-off events. [2024-06-27 20:39:14,202 INFO L125 PetriNetUnfolderBase]: For 2682739/2682743 co-relation queries the response was YES. [2024-06-27 20:39:14,282 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78713 conditions, 6025 events. 3753/6025 cut-off events. For 2682739/2682743 co-relation queries the response was YES. Maximal size of possible extension queue 407. Compared 37713 event pairs, 578 based on Foata normal form. 11/6001 useless extension candidates. Maximal degree in co-relation 78482. Up to 5018 conditions per place. [2024-06-27 20:39:14,313 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 635 selfloop transitions, 27 changer transitions 0/724 dead transitions. [2024-06-27 20:39:14,314 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 500 places, 724 transitions, 10439 flow [2024-06-27 20:39:14,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:39:14,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:39:14,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 159 transitions. [2024-06-27 20:39:14,315 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4732142857142857 [2024-06-27 20:39:14,315 INFO L175 Difference]: Start difference. First operand has 493 places, 692 transitions, 8413 flow. Second operand 8 states and 159 transitions. [2024-06-27 20:39:14,315 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 500 places, 724 transitions, 10439 flow [2024-06-27 20:39:25,876 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 496 places, 724 transitions, 10349 flow, removed 27 selfloop flow, removed 4 redundant places. [2024-06-27 20:39:25,883 INFO L231 Difference]: Finished difference. Result has 497 places, 694 transitions, 8495 flow [2024-06-27 20:39:25,884 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8323, PETRI_DIFFERENCE_MINUEND_PLACES=489, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=692, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=666, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8495, PETRI_PLACES=497, PETRI_TRANSITIONS=694} [2024-06-27 20:39:25,884 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 454 predicate places. [2024-06-27 20:39:25,884 INFO L495 AbstractCegarLoop]: Abstraction has has 497 places, 694 transitions, 8495 flow [2024-06-27 20:39:25,884 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:39:25,884 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:39:25,884 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:39:25,885 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable175 [2024-06-27 20:39:25,885 INFO L420 AbstractCegarLoop]: === Iteration 177 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:39:25,885 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:39:25,885 INFO L85 PathProgramCache]: Analyzing trace with hash -2135754019, now seen corresponding path program 3 times [2024-06-27 20:39:25,885 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:39:25,885 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [700981087] [2024-06-27 20:39:25,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:39:25,885 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:39:25,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:39:26,519 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:39:26,519 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:39:26,519 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [700981087] [2024-06-27 20:39:26,519 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [700981087] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:39:26,519 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:39:26,519 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:39:26,519 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1515742329] [2024-06-27 20:39:26,519 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:39:26,519 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:39:26,519 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:39:26,519 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:39:26,520 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:39:26,612 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-27 20:39:26,612 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 497 places, 694 transitions, 8495 flow. Second operand has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:39:26,612 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:39:26,612 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-27 20:39:26,613 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:39:28,714 INFO L124 PetriNetUnfolderBase]: 3743/5998 cut-off events. [2024-06-27 20:39:28,715 INFO L125 PetriNetUnfolderBase]: For 2597378/2597382 co-relation queries the response was YES. [2024-06-27 20:39:28,797 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76978 conditions, 5998 events. 3743/5998 cut-off events. For 2597378/2597382 co-relation queries the response was YES. Maximal size of possible extension queue 407. Compared 37529 event pairs, 746 based on Foata normal form. 11/5969 useless extension candidates. Maximal degree in co-relation 76746. Up to 5185 conditions per place. [2024-06-27 20:39:28,828 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 638 selfloop transitions, 22 changer transitions 0/722 dead transitions. [2024-06-27 20:39:28,828 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 504 places, 722 transitions, 9969 flow [2024-06-27 20:39:28,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:39:28,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:39:28,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 158 transitions. [2024-06-27 20:39:28,829 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47023809523809523 [2024-06-27 20:39:28,829 INFO L175 Difference]: Start difference. First operand has 497 places, 694 transitions, 8495 flow. Second operand 8 states and 158 transitions. [2024-06-27 20:39:28,829 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 504 places, 722 transitions, 9969 flow [2024-06-27 20:39:39,298 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 500 places, 722 transitions, 9898 flow, removed 22 selfloop flow, removed 4 redundant places. [2024-06-27 20:39:39,305 INFO L231 Difference]: Finished difference. Result has 501 places, 694 transitions, 8472 flow [2024-06-27 20:39:39,305 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8424, PETRI_DIFFERENCE_MINUEND_PLACES=493, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=694, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=672, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8472, PETRI_PLACES=501, PETRI_TRANSITIONS=694} [2024-06-27 20:39:39,305 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 458 predicate places. [2024-06-27 20:39:39,305 INFO L495 AbstractCegarLoop]: Abstraction has has 501 places, 694 transitions, 8472 flow [2024-06-27 20:39:39,306 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:39:39,306 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:39:39,306 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] [2024-06-27 20:39:39,306 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable176 [2024-06-27 20:39:39,306 INFO L420 AbstractCegarLoop]: === Iteration 178 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:39:39,306 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:39:39,306 INFO L85 PathProgramCache]: Analyzing trace with hash -2127183139, now seen corresponding path program 4 times [2024-06-27 20:39:39,306 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:39:39,306 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1293574266] [2024-06-27 20:39:39,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:39:39,307 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:39:39,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:39:39,887 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:39:39,888 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:39:39,888 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1293574266] [2024-06-27 20:39:39,888 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1293574266] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:39:39,888 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:39:39,888 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:39:39,888 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1524518840] [2024-06-27 20:39:39,888 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:39:39,889 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:39:39,889 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:39:39,889 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:39:39,889 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:39:39,973 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-27 20:39:39,973 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 501 places, 694 transitions, 8472 flow. Second operand has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:39:39,974 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:39:39,974 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-27 20:39:39,974 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:39:42,192 INFO L124 PetriNetUnfolderBase]: 3787/6071 cut-off events. [2024-06-27 20:39:42,193 INFO L125 PetriNetUnfolderBase]: For 2692742/2692746 co-relation queries the response was YES. [2024-06-27 20:39:42,283 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78046 conditions, 6071 events. 3787/6071 cut-off events. For 2692742/2692746 co-relation queries the response was YES. Maximal size of possible extension queue 414. Compared 38022 event pairs, 722 based on Foata normal form. 15/6043 useless extension candidates. Maximal degree in co-relation 77812. Up to 5243 conditions per place. [2024-06-27 20:39:42,317 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 635 selfloop transitions, 25 changer transitions 0/722 dead transitions. [2024-06-27 20:39:42,317 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 508 places, 722 transitions, 10120 flow [2024-06-27 20:39:42,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:39:42,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:39:42,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 159 transitions. [2024-06-27 20:39:42,318 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4732142857142857 [2024-06-27 20:39:42,318 INFO L175 Difference]: Start difference. First operand has 501 places, 694 transitions, 8472 flow. Second operand 8 states and 159 transitions. [2024-06-27 20:39:42,318 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 508 places, 722 transitions, 10120 flow [2024-06-27 20:39:51,297 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 501 places, 722 transitions, 10061 flow, removed 3 selfloop flow, removed 7 redundant places. [2024-06-27 20:39:51,304 INFO L231 Difference]: Finished difference. Result has 502 places, 696 transitions, 8599 flow [2024-06-27 20:39:51,305 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8413, PETRI_DIFFERENCE_MINUEND_PLACES=494, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=694, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=669, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8599, PETRI_PLACES=502, PETRI_TRANSITIONS=696} [2024-06-27 20:39:51,305 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 459 predicate places. [2024-06-27 20:39:51,305 INFO L495 AbstractCegarLoop]: Abstraction has has 502 places, 696 transitions, 8599 flow [2024-06-27 20:39:51,305 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:39:51,305 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:39:51,305 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:39:51,305 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable177 [2024-06-27 20:39:51,305 INFO L420 AbstractCegarLoop]: === Iteration 179 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:39:51,306 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:39:51,306 INFO L85 PathProgramCache]: Analyzing trace with hash -933930275, now seen corresponding path program 5 times [2024-06-27 20:39:51,306 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:39:51,306 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [749248080] [2024-06-27 20:39:51,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:39:51,306 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:39:51,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:39:51,933 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:39:51,933 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:39:51,933 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [749248080] [2024-06-27 20:39:51,933 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [749248080] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:39:51,933 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:39:51,934 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:39:51,934 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [401483312] [2024-06-27 20:39:51,934 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:39:51,934 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:39:51,934 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:39:51,934 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:39:51,934 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:39:52,072 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-27 20:39:52,072 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 502 places, 696 transitions, 8599 flow. Second operand has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:39:52,072 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:39:52,072 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-27 20:39:52,072 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:39:54,114 INFO L124 PetriNetUnfolderBase]: 3865/6195 cut-off events. [2024-06-27 20:39:54,114 INFO L125 PetriNetUnfolderBase]: For 2849204/2849207 co-relation queries the response was YES. [2024-06-27 20:39:54,302 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82805 conditions, 6195 events. 3865/6195 cut-off events. For 2849204/2849207 co-relation queries the response was YES. Maximal size of possible extension queue 424. Compared 38974 event pairs, 682 based on Foata normal form. 10/6170 useless extension candidates. Maximal degree in co-relation 82570. Up to 5126 conditions per place. [2024-06-27 20:39:54,334 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 627 selfloop transitions, 38 changer transitions 0/727 dead transitions. [2024-06-27 20:39:54,335 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 509 places, 727 transitions, 10763 flow [2024-06-27 20:39:54,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:39:54,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:39:54,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 160 transitions. [2024-06-27 20:39:54,335 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47619047619047616 [2024-06-27 20:39:54,336 INFO L175 Difference]: Start difference. First operand has 502 places, 696 transitions, 8599 flow. Second operand 8 states and 160 transitions. [2024-06-27 20:39:54,336 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 509 places, 727 transitions, 10763 flow [2024-06-27 20:40:02,454 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 503 places, 727 transitions, 10639 flow, removed 39 selfloop flow, removed 6 redundant places. [2024-06-27 20:40:02,461 INFO L231 Difference]: Finished difference. Result has 504 places, 698 transitions, 8678 flow [2024-06-27 20:40:02,462 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8475, PETRI_DIFFERENCE_MINUEND_PLACES=496, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=696, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=659, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8678, PETRI_PLACES=504, PETRI_TRANSITIONS=698} [2024-06-27 20:40:02,462 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 461 predicate places. [2024-06-27 20:40:02,462 INFO L495 AbstractCegarLoop]: Abstraction has has 504 places, 698 transitions, 8678 flow [2024-06-27 20:40:02,462 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:40:02,462 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:40:02,462 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] [2024-06-27 20:40:02,463 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable178 [2024-06-27 20:40:02,463 INFO L420 AbstractCegarLoop]: === Iteration 180 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:40:02,463 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:40:02,463 INFO L85 PathProgramCache]: Analyzing trace with hash -931073315, now seen corresponding path program 6 times [2024-06-27 20:40:02,463 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:40:02,463 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1765711889] [2024-06-27 20:40:02,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:40:02,464 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:40:02,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:40:03,147 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:40:03,147 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:40:03,147 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1765711889] [2024-06-27 20:40:03,147 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1765711889] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:40:03,147 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:40:03,147 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:40:03,147 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [545589914] [2024-06-27 20:40:03,147 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:40:03,147 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:40:03,147 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:40:03,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:40:03,147 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:40:03,252 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-27 20:40:03,252 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 504 places, 698 transitions, 8678 flow. Second operand has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:40:03,252 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:40:03,252 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-27 20:40:03,252 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:40:05,348 INFO L124 PetriNetUnfolderBase]: 3907/6253 cut-off events. [2024-06-27 20:40:05,349 INFO L125 PetriNetUnfolderBase]: For 2883556/2883559 co-relation queries the response was YES. [2024-06-27 20:40:05,437 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82788 conditions, 6253 events. 3907/6253 cut-off events. For 2883556/2883559 co-relation queries the response was YES. Maximal size of possible extension queue 426. Compared 39325 event pairs, 726 based on Foata normal form. 14/6232 useless extension candidates. Maximal degree in co-relation 82552. Up to 5374 conditions per place. [2024-06-27 20:40:05,471 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 625 selfloop transitions, 37 changer transitions 0/724 dead transitions. [2024-06-27 20:40:05,472 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 511 places, 724 transitions, 10348 flow [2024-06-27 20:40:05,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 20:40:05,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 20:40:05,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 158 transitions. [2024-06-27 20:40:05,472 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47023809523809523 [2024-06-27 20:40:05,473 INFO L175 Difference]: Start difference. First operand has 504 places, 698 transitions, 8678 flow. Second operand 8 states and 158 transitions. [2024-06-27 20:40:05,473 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 511 places, 724 transitions, 10348 flow [2024-06-27 20:40:14,262 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 507 places, 724 transitions, 10278 flow, removed 16 selfloop flow, removed 4 redundant places. [2024-06-27 20:40:14,269 INFO L231 Difference]: Finished difference. Result has 508 places, 700 transitions, 8824 flow [2024-06-27 20:40:14,269 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8610, PETRI_DIFFERENCE_MINUEND_PLACES=500, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=698, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=661, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8824, PETRI_PLACES=508, PETRI_TRANSITIONS=700} [2024-06-27 20:40:14,270 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 465 predicate places. [2024-06-27 20:40:14,270 INFO L495 AbstractCegarLoop]: Abstraction has has 508 places, 700 transitions, 8824 flow [2024-06-27 20:40:14,270 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:40:14,270 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:40:14,270 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:40:14,270 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable179 [2024-06-27 20:40:14,270 INFO L420 AbstractCegarLoop]: === Iteration 181 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 20:40:14,270 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:40:14,271 INFO L85 PathProgramCache]: Analyzing trace with hash -580603427, now seen corresponding path program 1 times [2024-06-27 20:40:14,271 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:40:14,271 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1987230644] [2024-06-27 20:40:14,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:40:14,271 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:40:14,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:40:14,930 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:40:14,930 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:40:14,930 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1987230644] [2024-06-27 20:40:14,931 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1987230644] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:40:14,931 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:40:14,931 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 20:40:14,931 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [499463667] [2024-06-27 20:40:14,931 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:40:14,931 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 20:40:14,931 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:40:14,931 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 20:40:14,932 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2024-06-27 20:40:15,015 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-27 20:40:15,016 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 508 places, 700 transitions, 8824 flow. Second operand has 11 states, 11 states have (on average 11.545454545454545) internal successors, (127), 11 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:40:15,016 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:40:15,016 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-27 20:40:15,016 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:40:17,354 INFO L124 PetriNetUnfolderBase]: 4181/6573 cut-off events. [2024-06-27 20:40:17,355 INFO L125 PetriNetUnfolderBase]: For 2866795/2866798 co-relation queries the response was YES. [2024-06-27 20:40:17,456 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85595 conditions, 6573 events. 4181/6573 cut-off events. For 2866795/2866798 co-relation queries the response was YES. Maximal size of possible extension queue 430. Compared 40273 event pairs, 683 based on Foata normal form. 12/6582 useless extension candidates. Maximal degree in co-relation 85357. Up to 5964 conditions per place. [2024-06-27 20:40:17,493 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 709 selfloop transitions, 29 changer transitions 0/743 dead transitions. [2024-06-27 20:40:17,493 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 517 places, 743 transitions, 10770 flow [2024-06-27 20:40:17,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:40:17,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:40:17,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 190 transitions. [2024-06-27 20:40:17,494 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4523809523809524 [2024-06-27 20:40:17,494 INFO L175 Difference]: Start difference. First operand has 508 places, 700 transitions, 8824 flow. Second operand 10 states and 190 transitions. [2024-06-27 20:40:17,494 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 517 places, 743 transitions, 10770 flow Killed by 15