./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/safe019_pso.oepc_pso.opt_tso.oepc_tso.opt.i --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --validate ./goblint.2024-05-21_14-57-05.files/protection/safe019_pso.oepc_pso.opt_tso.oepc_tso.opt.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version cde23df1 Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReachWitnessValidation.xml -i ../../../trunk/examples/svcomp/pthread-wmm/safe019_pso.oepc_pso.opt_tso.oepc_tso.opt.i ./goblint.2024-05-21_14-57-05.files/protection/safe019_pso.oepc_pso.opt_tso.oepc_tso.opt.yml/witness.yml -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --traceabstraction.compute.hoare.annotation.of.negated.interpolant.automaton,.abstraction.and.cfg false --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.fs.goblint-validation-cde23df-m [2024-06-14 11:29:42,015 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-14 11:29:42,081 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-14 11:29:42,088 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-14 11:29:42,090 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-14 11:29:42,120 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-14 11:29:42,121 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-14 11:29:42,121 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-14 11:29:42,122 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-14 11:29:42,128 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-14 11:29:42,128 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-14 11:29:42,129 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-14 11:29:42,130 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-14 11:29:42,131 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-14 11:29:42,131 INFO L153 SettingsManager]: * Use SBE=true [2024-06-14 11:29:42,131 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-14 11:29:42,132 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-14 11:29:42,132 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-14 11:29:42,132 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-14 11:29:42,132 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-14 11:29:42,133 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-14 11:29:42,133 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-14 11:29:42,133 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-14 11:29:42,134 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-14 11:29:42,134 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-14 11:29:42,134 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-14 11:29:42,134 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-14 11:29:42,135 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-14 11:29:42,135 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-14 11:29:42,136 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-14 11:29:42,137 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-14 11:29:42,137 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-14 11:29:42,137 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-14 11:29:42,137 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-14 11:29:42,137 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-14 11:29:42,138 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-14 11:29:42,138 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-14 11:29:42,150 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-14 11:29:42,151 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-14 11:29:42,151 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-14 11:29:42,151 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-14 11:29:42,151 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-14 11:29:42,152 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-14 11:29:42,152 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-14 11:29:42,374 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-14 11:29:42,395 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-14 11:29:42,397 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-14 11:29:42,397 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-14 11:29:42,398 INFO L274 PluginConnector]: CDTParser initialized [2024-06-14 11:29:42,398 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/safe019_pso.oepc_pso.opt_tso.oepc_tso.opt.i [2024-06-14 11:29:43,498 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-14 11:29:43,738 INFO L384 CDTParser]: Found 1 translation units. [2024-06-14 11:29:43,739 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe019_pso.oepc_pso.opt_tso.oepc_tso.opt.i [2024-06-14 11:29:43,750 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/85309d5d1/cf72ff2616d14455bde22255197be117/FLAG7747801a3 [2024-06-14 11:29:43,762 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/85309d5d1/cf72ff2616d14455bde22255197be117 [2024-06-14 11:29:43,765 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-14 11:29:43,765 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-14 11:29:43,766 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-05-21_14-57-05.files/protection/safe019_pso.oepc_pso.opt_tso.oepc_tso.opt.yml/witness.yml [2024-06-14 11:29:43,909 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-14 11:29:43,910 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-14 11:29:43,912 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-14 11:29:43,912 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-14 11:29:43,916 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-14 11:29:43,917 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.06 11:29:43" (1/2) ... [2024-06-14 11:29:43,917 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3cfaa292 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 11:29:43, skipping insertion in model container [2024-06-14 11:29:43,918 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.06 11:29:43" (1/2) ... [2024-06-14 11:29:43,919 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@2851a6a5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 11:29:43, skipping insertion in model container [2024-06-14 11:29:43,920 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 14.06 11:29:43" (2/2) ... [2024-06-14 11:29:43,922 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3cfaa292 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 11:29:43, skipping insertion in model container [2024-06-14 11:29:43,922 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 14.06 11:29:43" (2/2) ... [2024-06-14 11:29:43,922 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-14 11:29:43,977 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-14 11:29:43,978 INFO L97 edCorrectnessWitness]: Location invariant before [L791-L791] (((((! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || ((0 <= __unbuffered_p0_EBX && __unbuffered_p0_EBX <= 1) && (__unbuffered_p0_EBX == 0 || __unbuffered_p0_EBX == 1)))) && (! multithreaded || (((0 <= y && y <= 2) && y <= 127) && ((y == 0 || y == 1) || y == 2)))) && (! multithreaded || (((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 2) && __unbuffered_p0_EAX <= 127) && ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2))) [2024-06-14 11:29:43,978 INFO L97 edCorrectnessWitness]: Location invariant before [L795-L795] (((((! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || ((0 <= __unbuffered_p0_EBX && __unbuffered_p0_EBX <= 1) && (__unbuffered_p0_EBX == 0 || __unbuffered_p0_EBX == 1)))) && (! multithreaded || (((0 <= y && y <= 2) && y <= 127) && ((y == 0 || y == 1) || y == 2)))) && (! multithreaded || (((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 2) && __unbuffered_p0_EAX <= 127) && ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2))) [2024-06-14 11:29:43,978 INFO L97 edCorrectnessWitness]: Location invariant before [L793-L793] (((((! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || ((0 <= __unbuffered_p0_EBX && __unbuffered_p0_EBX <= 1) && (__unbuffered_p0_EBX == 0 || __unbuffered_p0_EBX == 1)))) && (! multithreaded || (((0 <= y && y <= 2) && y <= 127) && ((y == 0 || y == 1) || y == 2)))) && (! multithreaded || (((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 2) && __unbuffered_p0_EAX <= 127) && ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2))) [2024-06-14 11:29:43,978 INFO L97 edCorrectnessWitness]: Location invariant before [L796-L796] (((((! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || ((0 <= __unbuffered_p0_EBX && __unbuffered_p0_EBX <= 1) && (__unbuffered_p0_EBX == 0 || __unbuffered_p0_EBX == 1)))) && (! multithreaded || (((0 <= y && y <= 2) && y <= 127) && ((y == 0 || y == 1) || y == 2)))) && (! multithreaded || (((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 2) && __unbuffered_p0_EAX <= 127) && ((__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1) || __unbuffered_p0_EAX == 2))) [2024-06-14 11:29:43,979 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-14 11:29:43,979 INFO L106 edCorrectnessWitness]: ghost_update [L789-L789] multithreaded = 1; [2024-06-14 11:29:44,023 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-14 11:29:44,362 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-14 11:29:44,370 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-14 11:29:44,523 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-14 11:29:44,558 INFO L206 MainTranslator]: Completed translation [2024-06-14 11:29:44,561 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 11:29:44 WrapperNode [2024-06-14 11:29:44,562 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-14 11:29:44,563 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-14 11:29:44,563 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-14 11:29:44,563 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-14 11:29:44,570 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 11:29:44" (1/1) ... [2024-06-14 11:29:44,590 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 11:29:44" (1/1) ... [2024-06-14 11:29:44,613 INFO L138 Inliner]: procedures = 176, calls = 47, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 74 [2024-06-14 11:29:44,618 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-14 11:29:44,618 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-14 11:29:44,618 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-14 11:29:44,619 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-14 11:29:44,629 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 11:29:44" (1/1) ... [2024-06-14 11:29:44,630 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 11:29:44" (1/1) ... [2024-06-14 11:29:44,636 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 11:29:44" (1/1) ... [2024-06-14 11:29:44,650 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2024-06-14 11:29:44,650 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 11:29:44" (1/1) ... [2024-06-14 11:29:44,650 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 11:29:44" (1/1) ... [2024-06-14 11:29:44,657 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 11:29:44" (1/1) ... [2024-06-14 11:29:44,658 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 11:29:44" (1/1) ... [2024-06-14 11:29:44,660 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 11:29:44" (1/1) ... [2024-06-14 11:29:44,661 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 11:29:44" (1/1) ... [2024-06-14 11:29:44,663 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-14 11:29:44,664 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-14 11:29:44,664 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-14 11:29:44,664 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-14 11:29:44,665 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 11:29:44" (1/1) ... [2024-06-14 11:29:44,670 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-14 11:29:44,677 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-14 11:29:44,693 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-06-14 11:29:44,702 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-06-14 11:29:44,727 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-14 11:29:44,727 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-14 11:29:44,727 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-14 11:29:44,727 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-14 11:29:44,727 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-14 11:29:44,727 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-14 11:29:44,728 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-14 11:29:44,728 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-14 11:29:44,728 INFO L130 BoogieDeclarations]: Found specification of procedure P3 [2024-06-14 11:29:44,728 INFO L138 BoogieDeclarations]: Found implementation of procedure P3 [2024-06-14 11:29:44,728 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-14 11:29:44,729 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-14 11:29:44,729 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-14 11:29:44,730 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-14 11:29:44,731 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-14 11:29:44,837 INFO L244 CfgBuilder]: Building ICFG [2024-06-14 11:29:44,839 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-14 11:29:45,040 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-14 11:29:45,040 INFO L293 CfgBuilder]: Performing block encoding [2024-06-14 11:29:45,135 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-14 11:29:45,135 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-14 11:29:45,136 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.06 11:29:45 BoogieIcfgContainer [2024-06-14 11:29:45,136 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-14 11:29:45,164 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-14 11:29:45,164 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-14 11:29:45,167 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-14 11:29:45,168 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.06 11:29:43" (1/4) ... [2024-06-14 11:29:45,168 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6b5ebab7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.06 11:29:45, skipping insertion in model container [2024-06-14 11:29:45,169 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 14.06 11:29:43" (2/4) ... [2024-06-14 11:29:45,169 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6b5ebab7 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 14.06 11:29:45, skipping insertion in model container [2024-06-14 11:29:45,169 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 11:29:44" (3/4) ... [2024-06-14 11:29:45,169 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6b5ebab7 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 14.06 11:29:45, skipping insertion in model container [2024-06-14 11:29:45,170 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.06 11:29:45" (4/4) ... [2024-06-14 11:29:45,171 INFO L112 eAbstractionObserver]: Analyzing ICFG safe019_pso.oepc_pso.opt_tso.oepc_tso.opt.i [2024-06-14 11:29:45,202 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-14 11:29:45,202 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 4 error locations. [2024-06-14 11:29:45,202 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-14 11:29:45,246 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-14 11:29:45,276 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 63 places, 50 transitions, 116 flow [2024-06-14 11:29:45,318 INFO L124 PetriNetUnfolderBase]: 0/46 cut-off events. [2024-06-14 11:29:45,319 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-14 11:29:45,321 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59 conditions, 46 events. 0/46 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 81 event pairs, 0 based on Foata normal form. 0/42 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2024-06-14 11:29:45,322 INFO L82 GeneralOperation]: Start removeDead. Operand has 63 places, 50 transitions, 116 flow [2024-06-14 11:29:45,326 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 53 places, 40 transitions, 92 flow [2024-06-14 11:29:45,340 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-14 11:29:45,347 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;@5d57820c, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-14 11:29:45,347 INFO L358 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2024-06-14 11:29:45,352 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-14 11:29:45,352 INFO L124 PetriNetUnfolderBase]: 0/7 cut-off events. [2024-06-14 11:29:45,352 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-14 11:29:45,352 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:29:45,353 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-06-14 11:29:45,354 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 11:29:45,360 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:29:45,360 INFO L85 PathProgramCache]: Analyzing trace with hash -1396109065, now seen corresponding path program 1 times [2024-06-14 11:29:45,370 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:29:45,371 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1062238588] [2024-06-14 11:29:45,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:29:45,371 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:29:45,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:29:45,871 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:29:45,872 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:29:45,873 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1062238588] [2024-06-14 11:29:45,873 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1062238588] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:29:45,874 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:29:45,874 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-14 11:29:45,875 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [288591030] [2024-06-14 11:29:45,876 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:29:45,884 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-14 11:29:45,888 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:29:45,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-14 11:29:45,918 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-14 11:29:45,970 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 50 [2024-06-14 11:29:45,973 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 40 transitions, 92 flow. Second operand has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:29:45,973 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:29:45,973 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 50 [2024-06-14 11:29:45,974 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:29:46,443 INFO L124 PetriNetUnfolderBase]: 1971/2943 cut-off events. [2024-06-14 11:29:46,444 INFO L125 PetriNetUnfolderBase]: For 60/60 co-relation queries the response was YES. [2024-06-14 11:29:46,454 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5875 conditions, 2943 events. 1971/2943 cut-off events. For 60/60 co-relation queries the response was YES. Maximal size of possible extension queue 199. Compared 16620 event pairs, 1341 based on Foata normal form. 1/2863 useless extension candidates. Maximal degree in co-relation 5859. Up to 2785 conditions per place. [2024-06-14 11:29:46,472 INFO L140 encePairwiseOnDemand]: 41/50 looper letters, 38 selfloop transitions, 5 changer transitions 0/54 dead transitions. [2024-06-14 11:29:46,473 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 54 transitions, 215 flow [2024-06-14 11:29:46,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-14 11:29:46,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-14 11:29:46,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 104 transitions. [2024-06-14 11:29:46,485 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6933333333333334 [2024-06-14 11:29:46,486 INFO L175 Difference]: Start difference. First operand has 53 places, 40 transitions, 92 flow. Second operand 3 states and 104 transitions. [2024-06-14 11:29:46,487 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 54 transitions, 215 flow [2024-06-14 11:29:46,490 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 54 transitions, 208 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-06-14 11:29:46,496 INFO L231 Difference]: Finished difference. Result has 52 places, 44 transitions, 127 flow [2024-06-14 11:29:46,498 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=88, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=127, PETRI_PLACES=52, PETRI_TRANSITIONS=44} [2024-06-14 11:29:46,502 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, -1 predicate places. [2024-06-14 11:29:46,502 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 44 transitions, 127 flow [2024-06-14 11:29:46,503 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:29:46,503 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:29:46,503 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:29:46,503 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-14 11:29:46,504 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 11:29:46,504 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:29:46,504 INFO L85 PathProgramCache]: Analyzing trace with hash 74239535, now seen corresponding path program 1 times [2024-06-14 11:29:46,504 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:29:46,505 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [868219921] [2024-06-14 11:29:46,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:29:46,505 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:29:46,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:29:46,850 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:29:46,850 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:29:46,851 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [868219921] [2024-06-14 11:29:46,851 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [868219921] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:29:46,851 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:29:46,851 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 11:29:46,852 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1092246802] [2024-06-14 11:29:46,852 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:29:46,853 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 11:29:46,854 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:29:46,854 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 11:29:46,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-14 11:29:46,912 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 50 [2024-06-14 11:29:46,913 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 44 transitions, 127 flow. Second operand has 6 states, 6 states have (on average 18.5) internal successors, (111), 6 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) [2024-06-14 11:29:46,913 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:29:46,913 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 50 [2024-06-14 11:29:46,914 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:29:47,401 INFO L124 PetriNetUnfolderBase]: 3439/5046 cut-off events. [2024-06-14 11:29:47,401 INFO L125 PetriNetUnfolderBase]: For 938/956 co-relation queries the response was YES. [2024-06-14 11:29:47,412 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11668 conditions, 5046 events. 3439/5046 cut-off events. For 938/956 co-relation queries the response was YES. Maximal size of possible extension queue 248. Compared 27566 event pairs, 1852 based on Foata normal form. 15/5030 useless extension candidates. Maximal degree in co-relation 11653. Up to 4705 conditions per place. [2024-06-14 11:29:47,440 INFO L140 encePairwiseOnDemand]: 41/50 looper letters, 49 selfloop transitions, 8 changer transitions 0/66 dead transitions. [2024-06-14 11:29:47,440 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 66 transitions, 299 flow [2024-06-14 11:29:47,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-14 11:29:47,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-14 11:29:47,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 129 transitions. [2024-06-14 11:29:47,442 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.645 [2024-06-14 11:29:47,442 INFO L175 Difference]: Start difference. First operand has 52 places, 44 transitions, 127 flow. Second operand 4 states and 129 transitions. [2024-06-14 11:29:47,443 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 66 transitions, 299 flow [2024-06-14 11:29:47,444 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 66 transitions, 294 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-14 11:29:47,445 INFO L231 Difference]: Finished difference. Result has 54 places, 46 transitions, 162 flow [2024-06-14 11:29:47,445 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=118, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=162, PETRI_PLACES=54, PETRI_TRANSITIONS=46} [2024-06-14 11:29:47,446 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 1 predicate places. [2024-06-14 11:29:47,446 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 46 transitions, 162 flow [2024-06-14 11:29:47,447 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.5) internal successors, (111), 6 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) [2024-06-14 11:29:47,447 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:29:47,447 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:29:47,447 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-14 11:29:47,447 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 11:29:47,448 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:29:47,448 INFO L85 PathProgramCache]: Analyzing trace with hash -331451323, now seen corresponding path program 1 times [2024-06-14 11:29:47,448 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:29:47,449 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [856843871] [2024-06-14 11:29:47,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:29:47,449 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:29:47,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:29:47,604 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:29:47,604 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:29:47,604 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [856843871] [2024-06-14 11:29:47,605 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [856843871] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:29:47,605 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:29:47,605 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-14 11:29:47,605 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [405009171] [2024-06-14 11:29:47,605 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:29:47,606 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-14 11:29:47,606 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:29:47,606 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-14 11:29:47,607 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-14 11:29:47,658 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 50 [2024-06-14 11:29:47,659 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 46 transitions, 162 flow. Second operand has 4 states, 4 states have (on average 19.5) internal successors, (78), 4 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:29:47,659 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:29:47,659 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 50 [2024-06-14 11:29:47,659 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:29:48,123 INFO L124 PetriNetUnfolderBase]: 3382/5002 cut-off events. [2024-06-14 11:29:48,124 INFO L125 PetriNetUnfolderBase]: For 2387/2387 co-relation queries the response was YES. [2024-06-14 11:29:48,132 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12699 conditions, 5002 events. 3382/5002 cut-off events. For 2387/2387 co-relation queries the response was YES. Maximal size of possible extension queue 244. Compared 27892 event pairs, 1738 based on Foata normal form. 3/4996 useless extension candidates. Maximal degree in co-relation 12682. Up to 4690 conditions per place. [2024-06-14 11:29:48,161 INFO L140 encePairwiseOnDemand]: 41/50 looper letters, 53 selfloop transitions, 9 changer transitions 0/71 dead transitions. [2024-06-14 11:29:48,161 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 71 transitions, 358 flow [2024-06-14 11:29:48,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-14 11:29:48,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-14 11:29:48,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 126 transitions. [2024-06-14 11:29:48,167 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.63 [2024-06-14 11:29:48,167 INFO L175 Difference]: Start difference. First operand has 54 places, 46 transitions, 162 flow. Second operand 4 states and 126 transitions. [2024-06-14 11:29:48,167 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 71 transitions, 358 flow [2024-06-14 11:29:48,171 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 71 transitions, 336 flow, removed 3 selfloop flow, removed 2 redundant places. [2024-06-14 11:29:48,173 INFO L231 Difference]: Finished difference. Result has 57 places, 54 transitions, 214 flow [2024-06-14 11:29:48,173 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=144, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=214, PETRI_PLACES=57, PETRI_TRANSITIONS=54} [2024-06-14 11:29:48,174 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 4 predicate places. [2024-06-14 11:29:48,174 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 54 transitions, 214 flow [2024-06-14 11:29:48,174 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.5) internal successors, (78), 4 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:29:48,175 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:29:48,175 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:29:48,175 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-14 11:29:48,175 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 11:29:48,176 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:29:48,176 INFO L85 PathProgramCache]: Analyzing trace with hash -697114588, now seen corresponding path program 1 times [2024-06-14 11:29:48,176 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:29:48,177 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [702639534] [2024-06-14 11:29:48,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:29:48,177 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:29:48,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:29:48,402 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:29:48,403 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:29:48,407 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [702639534] [2024-06-14 11:29:48,407 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [702639534] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:29:48,407 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:29:48,408 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-14 11:29:48,408 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1428466518] [2024-06-14 11:29:48,408 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:29:48,409 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-14 11:29:48,409 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:29:48,410 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-14 11:29:48,411 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-06-14 11:29:48,473 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 50 [2024-06-14 11:29:48,474 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 54 transitions, 214 flow. Second operand has 5 states, 5 states have (on average 19.2) internal successors, (96), 5 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:29:48,474 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:29:48,474 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 50 [2024-06-14 11:29:48,474 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:29:49,000 INFO L124 PetriNetUnfolderBase]: 3367/4973 cut-off events. [2024-06-14 11:29:49,000 INFO L125 PetriNetUnfolderBase]: For 4260/4260 co-relation queries the response was YES. [2024-06-14 11:29:49,013 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14086 conditions, 4973 events. 3367/4973 cut-off events. For 4260/4260 co-relation queries the response was YES. Maximal size of possible extension queue 244. Compared 27735 event pairs, 1632 based on Foata normal form. 6/4970 useless extension candidates. Maximal degree in co-relation 14067. Up to 4639 conditions per place. [2024-06-14 11:29:49,039 INFO L140 encePairwiseOnDemand]: 41/50 looper letters, 61 selfloop transitions, 12 changer transitions 0/82 dead transitions. [2024-06-14 11:29:49,039 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 82 transitions, 440 flow [2024-06-14 11:29:49,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 11:29:49,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 11:29:49,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 154 transitions. [2024-06-14 11:29:49,041 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.616 [2024-06-14 11:29:49,041 INFO L175 Difference]: Start difference. First operand has 57 places, 54 transitions, 214 flow. Second operand 5 states and 154 transitions. [2024-06-14 11:29:49,042 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 82 transitions, 440 flow [2024-06-14 11:29:49,045 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 82 transitions, 436 flow, removed 2 selfloop flow, removed 0 redundant places. [2024-06-14 11:29:49,047 INFO L231 Difference]: Finished difference. Result has 62 places, 57 transitions, 266 flow [2024-06-14 11:29:49,047 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=210, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=266, PETRI_PLACES=62, PETRI_TRANSITIONS=57} [2024-06-14 11:29:49,048 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 9 predicate places. [2024-06-14 11:29:49,048 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 57 transitions, 266 flow [2024-06-14 11:29:49,048 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 19.2) internal successors, (96), 5 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:29:49,049 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:29:49,049 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:29:49,049 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-14 11:29:49,049 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 11:29:49,050 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:29:49,050 INFO L85 PathProgramCache]: Analyzing trace with hash -185775736, now seen corresponding path program 1 times [2024-06-14 11:29:49,050 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:29:49,050 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1201779655] [2024-06-14 11:29:49,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:29:49,051 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:29:49,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:29:49,261 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:29:49,262 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:29:49,262 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1201779655] [2024-06-14 11:29:49,262 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1201779655] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:29:49,262 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:29:49,262 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 11:29:49,263 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2131074644] [2024-06-14 11:29:49,263 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:29:49,263 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 11:29:49,263 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:29:49,264 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 11:29:49,264 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-14 11:29:49,318 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 50 [2024-06-14 11:29:49,318 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 57 transitions, 266 flow. Second operand has 6 states, 6 states have (on average 18.0) internal successors, (108), 6 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:29:49,319 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:29:49,319 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 50 [2024-06-14 11:29:49,319 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:29:49,874 INFO L124 PetriNetUnfolderBase]: 4344/6383 cut-off events. [2024-06-14 11:29:49,875 INFO L125 PetriNetUnfolderBase]: For 8370/8382 co-relation queries the response was YES. [2024-06-14 11:29:49,892 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19313 conditions, 6383 events. 4344/6383 cut-off events. For 8370/8382 co-relation queries the response was YES. Maximal size of possible extension queue 282. Compared 35502 event pairs, 1756 based on Foata normal form. 15/6379 useless extension candidates. Maximal degree in co-relation 19291. Up to 5845 conditions per place. [2024-06-14 11:29:49,921 INFO L140 encePairwiseOnDemand]: 39/50 looper letters, 59 selfloop transitions, 17 changer transitions 0/84 dead transitions. [2024-06-14 11:29:49,921 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 84 transitions, 514 flow [2024-06-14 11:29:49,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-14 11:29:49,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-14 11:29:49,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 129 transitions. [2024-06-14 11:29:49,922 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.645 [2024-06-14 11:29:49,922 INFO L175 Difference]: Start difference. First operand has 62 places, 57 transitions, 266 flow. Second operand 4 states and 129 transitions. [2024-06-14 11:29:49,923 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 84 transitions, 514 flow [2024-06-14 11:29:49,930 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 84 transitions, 484 flow, removed 5 selfloop flow, removed 3 redundant places. [2024-06-14 11:29:49,931 INFO L231 Difference]: Finished difference. Result has 63 places, 63 transitions, 336 flow [2024-06-14 11:29:49,932 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=236, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=336, PETRI_PLACES=63, PETRI_TRANSITIONS=63} [2024-06-14 11:29:49,932 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 10 predicate places. [2024-06-14 11:29:49,933 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 63 transitions, 336 flow [2024-06-14 11:29:49,933 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.0) internal successors, (108), 6 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:29:49,933 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:29:49,933 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:29:49,933 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-14 11:29:49,934 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 11:29:49,934 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:29:49,934 INFO L85 PathProgramCache]: Analyzing trace with hash -174037276, now seen corresponding path program 2 times [2024-06-14 11:29:49,934 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:29:49,934 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1670797537] [2024-06-14 11:29:49,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:29:49,935 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:29:49,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:29:50,099 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:29:50,100 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:29:50,100 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1670797537] [2024-06-14 11:29:50,100 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1670797537] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:29:50,100 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:29:50,100 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 11:29:50,101 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1408624466] [2024-06-14 11:29:50,101 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:29:50,101 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 11:29:50,101 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:29:50,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 11:29:50,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-14 11:29:50,144 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 50 [2024-06-14 11:29:50,145 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 63 transitions, 336 flow. Second operand has 6 states, 6 states have (on average 18.0) internal successors, (108), 6 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:29:50,145 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:29:50,145 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 50 [2024-06-14 11:29:50,145 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:29:50,763 INFO L124 PetriNetUnfolderBase]: 4335/6390 cut-off events. [2024-06-14 11:29:50,763 INFO L125 PetriNetUnfolderBase]: For 12420/12423 co-relation queries the response was YES. [2024-06-14 11:29:50,788 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21678 conditions, 6390 events. 4335/6390 cut-off events. For 12420/12423 co-relation queries the response was YES. Maximal size of possible extension queue 284. Compared 35258 event pairs, 1873 based on Foata normal form. 3/6379 useless extension candidates. Maximal degree in co-relation 21655. Up to 5887 conditions per place. [2024-06-14 11:29:50,814 INFO L140 encePairwiseOnDemand]: 40/50 looper letters, 72 selfloop transitions, 20 changer transitions 0/100 dead transitions. [2024-06-14 11:29:50,815 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 100 transitions, 678 flow [2024-06-14 11:29:50,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 11:29:50,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 11:29:50,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 154 transitions. [2024-06-14 11:29:50,816 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.616 [2024-06-14 11:29:50,816 INFO L175 Difference]: Start difference. First operand has 63 places, 63 transitions, 336 flow. Second operand 5 states and 154 transitions. [2024-06-14 11:29:50,817 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 100 transitions, 678 flow [2024-06-14 11:29:50,830 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 100 transitions, 610 flow, removed 19 selfloop flow, removed 2 redundant places. [2024-06-14 11:29:50,832 INFO L231 Difference]: Finished difference. Result has 68 places, 74 transitions, 449 flow [2024-06-14 11:29:50,832 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=288, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=449, PETRI_PLACES=68, PETRI_TRANSITIONS=74} [2024-06-14 11:29:50,835 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 15 predicate places. [2024-06-14 11:29:50,835 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 74 transitions, 449 flow [2024-06-14 11:29:50,835 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.0) internal successors, (108), 6 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:29:50,835 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:29:50,836 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:29:50,836 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-14 11:29:50,836 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 11:29:50,837 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:29:50,837 INFO L85 PathProgramCache]: Analyzing trace with hash -1597410852, now seen corresponding path program 1 times [2024-06-14 11:29:50,837 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:29:50,841 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1385176996] [2024-06-14 11:29:50,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:29:50,842 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:29:50,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:29:51,008 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:29:51,008 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:29:51,008 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1385176996] [2024-06-14 11:29:51,008 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1385176996] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:29:51,009 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:29:51,009 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-14 11:29:51,009 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [939004746] [2024-06-14 11:29:51,009 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:29:51,009 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-14 11:29:51,010 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:29:51,010 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-14 11:29:51,010 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-14 11:29:51,038 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 50 [2024-06-14 11:29:51,038 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 74 transitions, 449 flow. Second operand has 5 states, 5 states have (on average 19.8) internal successors, (99), 5 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:29:51,038 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:29:51,038 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 50 [2024-06-14 11:29:51,038 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:29:51,651 INFO L124 PetriNetUnfolderBase]: 4168/6209 cut-off events. [2024-06-14 11:29:51,652 INFO L125 PetriNetUnfolderBase]: For 12904/12907 co-relation queries the response was YES. [2024-06-14 11:29:51,673 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21339 conditions, 6209 events. 4168/6209 cut-off events. For 12904/12907 co-relation queries the response was YES. Maximal size of possible extension queue 280. Compared 34795 event pairs, 1823 based on Foata normal form. 5/6202 useless extension candidates. Maximal degree in co-relation 21313. Up to 5617 conditions per place. [2024-06-14 11:29:51,705 INFO L140 encePairwiseOnDemand]: 41/50 looper letters, 79 selfloop transitions, 14 changer transitions 0/106 dead transitions. [2024-06-14 11:29:51,706 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 106 transitions, 791 flow [2024-06-14 11:29:51,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-14 11:29:51,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-14 11:29:51,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 127 transitions. [2024-06-14 11:29:51,707 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.635 [2024-06-14 11:29:51,707 INFO L175 Difference]: Start difference. First operand has 68 places, 74 transitions, 449 flow. Second operand 4 states and 127 transitions. [2024-06-14 11:29:51,708 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 106 transitions, 791 flow [2024-06-14 11:29:51,719 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 106 transitions, 755 flow, removed 18 selfloop flow, removed 0 redundant places. [2024-06-14 11:29:51,721 INFO L231 Difference]: Finished difference. Result has 73 places, 87 transitions, 554 flow [2024-06-14 11:29:51,721 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=417, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=554, PETRI_PLACES=73, PETRI_TRANSITIONS=87} [2024-06-14 11:29:51,721 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 20 predicate places. [2024-06-14 11:29:51,722 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 87 transitions, 554 flow [2024-06-14 11:29:51,722 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 19.8) internal successors, (99), 5 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:29:51,722 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:29:51,722 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:29:51,723 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-14 11:29:51,723 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 11:29:51,723 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:29:51,723 INFO L85 PathProgramCache]: Analyzing trace with hash -352432889, now seen corresponding path program 1 times [2024-06-14 11:29:51,723 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:29:51,724 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1034831181] [2024-06-14 11:29:51,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:29:51,724 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:29:51,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:29:51,938 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:29:51,939 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:29:51,939 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1034831181] [2024-06-14 11:29:51,939 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1034831181] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:29:51,939 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:29:51,939 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:29:51,940 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [525381481] [2024-06-14 11:29:51,940 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:29:51,941 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:29:51,941 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:29:51,941 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:29:51,942 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:29:51,985 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 50 [2024-06-14 11:29:51,985 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 87 transitions, 554 flow. Second operand has 7 states, 7 states have (on average 17.857142857142858) internal successors, (125), 7 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:29:51,986 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:29:51,986 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 50 [2024-06-14 11:29:51,986 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:29:52,739 INFO L124 PetriNetUnfolderBase]: 4930/7282 cut-off events. [2024-06-14 11:29:52,740 INFO L125 PetriNetUnfolderBase]: For 23629/23638 co-relation queries the response was YES. [2024-06-14 11:29:52,765 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28386 conditions, 7282 events. 4930/7282 cut-off events. For 23629/23638 co-relation queries the response was YES. Maximal size of possible extension queue 318. Compared 41094 event pairs, 1236 based on Foata normal form. 34/7299 useless extension candidates. Maximal degree in co-relation 28356. Up to 5974 conditions per place. [2024-06-14 11:29:52,801 INFO L140 encePairwiseOnDemand]: 39/50 looper letters, 95 selfloop transitions, 39 changer transitions 0/142 dead transitions. [2024-06-14 11:29:52,801 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 142 transitions, 1079 flow [2024-06-14 11:29:52,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 11:29:52,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 11:29:52,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 194 transitions. [2024-06-14 11:29:52,804 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6466666666666666 [2024-06-14 11:29:52,804 INFO L175 Difference]: Start difference. First operand has 73 places, 87 transitions, 554 flow. Second operand 6 states and 194 transitions. [2024-06-14 11:29:52,805 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 142 transitions, 1079 flow [2024-06-14 11:29:52,832 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 142 transitions, 1065 flow, removed 7 selfloop flow, removed 0 redundant places. [2024-06-14 11:29:52,835 INFO L231 Difference]: Finished difference. Result has 80 places, 97 transitions, 747 flow [2024-06-14 11:29:52,836 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=540, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=747, PETRI_PLACES=80, PETRI_TRANSITIONS=97} [2024-06-14 11:29:52,838 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 27 predicate places. [2024-06-14 11:29:52,838 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 97 transitions, 747 flow [2024-06-14 11:29:52,839 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.857142857142858) internal successors, (125), 7 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:29:52,839 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:29:52,839 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:29:52,839 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-14 11:29:52,840 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 11:29:52,840 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:29:52,840 INFO L85 PathProgramCache]: Analyzing trace with hash 995305755, now seen corresponding path program 2 times [2024-06-14 11:29:52,840 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:29:52,840 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1786058730] [2024-06-14 11:29:52,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:29:52,841 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:29:52,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:29:53,046 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:29:53,046 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:29:53,046 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1786058730] [2024-06-14 11:29:53,047 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1786058730] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:29:53,047 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:29:53,047 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:29:53,047 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2047739529] [2024-06-14 11:29:53,047 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:29:53,048 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:29:53,048 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:29:53,048 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:29:53,049 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:29:53,091 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 50 [2024-06-14 11:29:53,092 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 97 transitions, 747 flow. Second operand has 7 states, 7 states have (on average 17.857142857142858) internal successors, (125), 7 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:29:53,092 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:29:53,092 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 50 [2024-06-14 11:29:53,092 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:29:53,771 INFO L124 PetriNetUnfolderBase]: 4808/7104 cut-off events. [2024-06-14 11:29:53,772 INFO L125 PetriNetUnfolderBase]: For 30686/30695 co-relation queries the response was YES. [2024-06-14 11:29:53,800 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29793 conditions, 7104 events. 4808/7104 cut-off events. For 30686/30695 co-relation queries the response was YES. Maximal size of possible extension queue 305. Compared 40048 event pairs, 1543 based on Foata normal form. 52/7139 useless extension candidates. Maximal degree in co-relation 29759. Up to 6153 conditions per place. [2024-06-14 11:29:53,838 INFO L140 encePairwiseOnDemand]: 39/50 looper letters, 89 selfloop transitions, 33 changer transitions 0/130 dead transitions. [2024-06-14 11:29:53,838 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 130 transitions, 1107 flow [2024-06-14 11:29:53,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 11:29:53,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 11:29:53,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 161 transitions. [2024-06-14 11:29:53,839 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.644 [2024-06-14 11:29:53,840 INFO L175 Difference]: Start difference. First operand has 80 places, 97 transitions, 747 flow. Second operand 5 states and 161 transitions. [2024-06-14 11:29:53,840 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 130 transitions, 1107 flow [2024-06-14 11:29:53,891 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 130 transitions, 1042 flow, removed 17 selfloop flow, removed 2 redundant places. [2024-06-14 11:29:53,897 INFO L231 Difference]: Finished difference. Result has 83 places, 98 transitions, 781 flow [2024-06-14 11:29:53,898 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=686, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=97, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=781, PETRI_PLACES=83, PETRI_TRANSITIONS=98} [2024-06-14 11:29:53,899 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 30 predicate places. [2024-06-14 11:29:53,899 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 98 transitions, 781 flow [2024-06-14 11:29:53,899 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.857142857142858) internal successors, (125), 7 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:29:53,899 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:29:53,899 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:29:53,900 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-14 11:29:53,900 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 11:29:53,900 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:29:53,900 INFO L85 PathProgramCache]: Analyzing trace with hash 253924259, now seen corresponding path program 3 times [2024-06-14 11:29:53,901 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:29:53,902 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [150650996] [2024-06-14 11:29:53,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:29:53,902 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:29:53,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:29:54,103 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:29:54,104 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:29:54,104 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [150650996] [2024-06-14 11:29:54,104 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [150650996] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:29:54,104 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:29:54,104 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:29:54,104 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1634042899] [2024-06-14 11:29:54,105 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:29:54,105 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:29:54,105 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:29:54,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:29:54,106 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:29:54,154 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 50 [2024-06-14 11:29:54,155 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 98 transitions, 781 flow. Second operand has 7 states, 7 states have (on average 17.857142857142858) internal successors, (125), 7 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:29:54,155 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:29:54,155 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 50 [2024-06-14 11:29:54,155 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:29:54,831 INFO L124 PetriNetUnfolderBase]: 4885/7220 cut-off events. [2024-06-14 11:29:54,832 INFO L125 PetriNetUnfolderBase]: For 33062/33065 co-relation queries the response was YES. [2024-06-14 11:29:54,852 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30778 conditions, 7220 events. 4885/7220 cut-off events. For 33062/33065 co-relation queries the response was YES. Maximal size of possible extension queue 309. Compared 40657 event pairs, 1791 based on Foata normal form. 24/7230 useless extension candidates. Maximal degree in co-relation 30742. Up to 6540 conditions per place. [2024-06-14 11:29:54,890 INFO L140 encePairwiseOnDemand]: 40/50 looper letters, 106 selfloop transitions, 23 changer transitions 0/137 dead transitions. [2024-06-14 11:29:54,890 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 137 transitions, 1174 flow [2024-06-14 11:29:54,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 11:29:54,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 11:29:54,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 183 transitions. [2024-06-14 11:29:54,892 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.61 [2024-06-14 11:29:54,892 INFO L175 Difference]: Start difference. First operand has 83 places, 98 transitions, 781 flow. Second operand 6 states and 183 transitions. [2024-06-14 11:29:54,892 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 137 transitions, 1174 flow [2024-06-14 11:29:54,941 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 137 transitions, 1116 flow, removed 2 selfloop flow, removed 3 redundant places. [2024-06-14 11:29:54,943 INFO L231 Difference]: Finished difference. Result has 86 places, 100 transitions, 811 flow [2024-06-14 11:29:54,943 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=723, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=98, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=811, PETRI_PLACES=86, PETRI_TRANSITIONS=100} [2024-06-14 11:29:54,944 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 33 predicate places. [2024-06-14 11:29:54,944 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 100 transitions, 811 flow [2024-06-14 11:29:54,945 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.857142857142858) internal successors, (125), 7 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:29:54,945 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:29:54,945 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:29:54,945 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-14 11:29:54,945 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 11:29:54,945 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:29:54,946 INFO L85 PathProgramCache]: Analyzing trace with hash 254108709, now seen corresponding path program 1 times [2024-06-14 11:29:54,946 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:29:54,946 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1930209477] [2024-06-14 11:29:54,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:29:54,946 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:29:54,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:29:55,122 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:29:55,122 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:29:55,122 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1930209477] [2024-06-14 11:29:55,123 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1930209477] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:29:55,123 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:29:55,123 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:29:55,123 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [79953198] [2024-06-14 11:29:55,123 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:29:55,124 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:29:55,124 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:29:55,125 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:29:55,125 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:29:55,185 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 50 [2024-06-14 11:29:55,186 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 100 transitions, 811 flow. Second operand has 7 states, 7 states have (on average 17.857142857142858) internal successors, (125), 7 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:29:55,186 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:29:55,186 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 50 [2024-06-14 11:29:55,187 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:29:55,874 INFO L124 PetriNetUnfolderBase]: 4846/7163 cut-off events. [2024-06-14 11:29:55,874 INFO L125 PetriNetUnfolderBase]: For 37299/37302 co-relation queries the response was YES. [2024-06-14 11:29:55,901 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31120 conditions, 7163 events. 4846/7163 cut-off events. For 37299/37302 co-relation queries the response was YES. Maximal size of possible extension queue 306. Compared 40270 event pairs, 1527 based on Foata normal form. 18/7167 useless extension candidates. Maximal degree in co-relation 31083. Up to 6141 conditions per place. [2024-06-14 11:29:55,944 INFO L140 encePairwiseOnDemand]: 40/50 looper letters, 106 selfloop transitions, 29 changer transitions 0/143 dead transitions. [2024-06-14 11:29:55,944 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 143 transitions, 1233 flow [2024-06-14 11:29:55,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 11:29:55,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 11:29:55,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 185 transitions. [2024-06-14 11:29:55,946 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6166666666666667 [2024-06-14 11:29:55,946 INFO L175 Difference]: Start difference. First operand has 86 places, 100 transitions, 811 flow. Second operand 6 states and 185 transitions. [2024-06-14 11:29:55,946 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 143 transitions, 1233 flow [2024-06-14 11:29:56,004 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 143 transitions, 1175 flow, removed 8 selfloop flow, removed 4 redundant places. [2024-06-14 11:29:56,006 INFO L231 Difference]: Finished difference. Result has 88 places, 102 transitions, 865 flow [2024-06-14 11:29:56,006 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=735, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=865, PETRI_PLACES=88, PETRI_TRANSITIONS=102} [2024-06-14 11:29:56,007 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 35 predicate places. [2024-06-14 11:29:56,007 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 102 transitions, 865 flow [2024-06-14 11:29:56,007 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.857142857142858) internal successors, (125), 7 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:29:56,007 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:29:56,008 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:29:56,008 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-14 11:29:56,008 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 11:29:56,008 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:29:56,008 INFO L85 PathProgramCache]: Analyzing trace with hash 1350169372, now seen corresponding path program 1 times [2024-06-14 11:29:56,009 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:29:56,009 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1183100241] [2024-06-14 11:29:56,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:29:56,009 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:29:56,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:29:56,174 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:29:56,174 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:29:56,174 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1183100241] [2024-06-14 11:29:56,175 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1183100241] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:29:56,175 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:29:56,175 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-14 11:29:56,175 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1809014611] [2024-06-14 11:29:56,175 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:29:56,176 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-14 11:29:56,176 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:29:56,176 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-14 11:29:56,176 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-14 11:29:56,211 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 50 [2024-06-14 11:29:56,212 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 102 transitions, 865 flow. Second operand has 5 states, 5 states have (on average 19.8) internal successors, (99), 5 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:29:56,212 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:29:56,212 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 50 [2024-06-14 11:29:56,213 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:29:56,826 INFO L124 PetriNetUnfolderBase]: 4585/6879 cut-off events. [2024-06-14 11:29:56,826 INFO L125 PetriNetUnfolderBase]: For 42420/42437 co-relation queries the response was YES. [2024-06-14 11:29:56,846 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30998 conditions, 6879 events. 4585/6879 cut-off events. For 42420/42437 co-relation queries the response was YES. Maximal size of possible extension queue 302. Compared 39632 event pairs, 1723 based on Foata normal form. 8/6876 useless extension candidates. Maximal degree in co-relation 30959. Up to 6285 conditions per place. [2024-06-14 11:29:56,881 INFO L140 encePairwiseOnDemand]: 41/50 looper letters, 100 selfloop transitions, 23 changer transitions 0/134 dead transitions. [2024-06-14 11:29:56,882 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 134 transitions, 1269 flow [2024-06-14 11:29:56,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 11:29:56,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 11:29:56,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 151 transitions. [2024-06-14 11:29:56,883 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.604 [2024-06-14 11:29:56,883 INFO L175 Difference]: Start difference. First operand has 88 places, 102 transitions, 865 flow. Second operand 5 states and 151 transitions. [2024-06-14 11:29:56,883 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 134 transitions, 1269 flow [2024-06-14 11:29:56,957 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 134 transitions, 1206 flow, removed 10 selfloop flow, removed 3 redundant places. [2024-06-14 11:29:56,960 INFO L231 Difference]: Finished difference. Result has 92 places, 113 transitions, 1004 flow [2024-06-14 11:29:56,960 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=802, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=102, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1004, PETRI_PLACES=92, PETRI_TRANSITIONS=113} [2024-06-14 11:29:56,960 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 39 predicate places. [2024-06-14 11:29:56,961 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 113 transitions, 1004 flow [2024-06-14 11:29:56,961 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 19.8) internal successors, (99), 5 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:29:56,961 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:29:56,961 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:29:56,961 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-14 11:29:56,962 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 11:29:56,962 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:29:56,962 INFO L85 PathProgramCache]: Analyzing trace with hash -1116202485, now seen corresponding path program 1 times [2024-06-14 11:29:56,962 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:29:56,962 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1957240218] [2024-06-14 11:29:56,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:29:56,963 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:29:56,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:29:57,124 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:29:57,124 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:29:57,124 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1957240218] [2024-06-14 11:29:57,124 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1957240218] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:29:57,124 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:29:57,125 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 11:29:57,125 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1783290059] [2024-06-14 11:29:57,125 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:29:57,125 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 11:29:57,125 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:29:57,126 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 11:29:57,126 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-14 11:29:57,177 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 50 [2024-06-14 11:29:57,177 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 113 transitions, 1004 flow. Second operand has 6 states, 6 states have (on average 19.5) internal successors, (117), 6 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:29:57,177 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:29:57,177 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 50 [2024-06-14 11:29:57,178 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:29:57,691 INFO L124 PetriNetUnfolderBase]: 4740/7089 cut-off events. [2024-06-14 11:29:57,691 INFO L125 PetriNetUnfolderBase]: For 46798/46807 co-relation queries the response was YES. [2024-06-14 11:29:57,712 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32751 conditions, 7089 events. 4740/7089 cut-off events. For 46798/46807 co-relation queries the response was YES. Maximal size of possible extension queue 310. Compared 40894 event pairs, 1726 based on Foata normal form. 12/7071 useless extension candidates. Maximal degree in co-relation 32709. Up to 6320 conditions per place. [2024-06-14 11:29:57,745 INFO L140 encePairwiseOnDemand]: 40/50 looper letters, 89 selfloop transitions, 36 changer transitions 0/141 dead transitions. [2024-06-14 11:29:57,745 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 141 transitions, 1421 flow [2024-06-14 11:29:57,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 11:29:57,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 11:29:57,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 151 transitions. [2024-06-14 11:29:57,746 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.604 [2024-06-14 11:29:57,746 INFO L175 Difference]: Start difference. First operand has 92 places, 113 transitions, 1004 flow. Second operand 5 states and 151 transitions. [2024-06-14 11:29:57,747 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 141 transitions, 1421 flow [2024-06-14 11:29:57,832 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 141 transitions, 1375 flow, removed 23 selfloop flow, removed 0 redundant places. [2024-06-14 11:29:57,839 INFO L231 Difference]: Finished difference. Result has 98 places, 124 transitions, 1168 flow [2024-06-14 11:29:57,839 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=958, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=113, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1168, PETRI_PLACES=98, PETRI_TRANSITIONS=124} [2024-06-14 11:29:57,840 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 45 predicate places. [2024-06-14 11:29:57,840 INFO L495 AbstractCegarLoop]: Abstraction has has 98 places, 124 transitions, 1168 flow [2024-06-14 11:29:57,840 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.5) internal successors, (117), 6 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:29:57,840 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:29:57,841 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:29:57,841 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-14 11:29:57,841 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 11:29:57,841 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:29:57,842 INFO L85 PathProgramCache]: Analyzing trace with hash -1115816535, now seen corresponding path program 2 times [2024-06-14 11:29:57,842 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:29:57,842 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1222542423] [2024-06-14 11:29:57,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:29:57,842 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:29:57,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:29:57,984 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:29:57,984 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:29:57,984 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1222542423] [2024-06-14 11:29:57,984 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1222542423] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:29:57,985 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:29:57,985 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 11:29:57,985 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2033818772] [2024-06-14 11:29:57,985 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:29:57,985 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 11:29:57,986 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:29:57,986 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 11:29:57,986 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-14 11:29:58,042 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 50 [2024-06-14 11:29:58,042 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 124 transitions, 1168 flow. Second operand has 6 states, 6 states have (on average 19.5) internal successors, (117), 6 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:29:58,042 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:29:58,042 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 50 [2024-06-14 11:29:58,043 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:29:58,652 INFO L124 PetriNetUnfolderBase]: 4767/7109 cut-off events. [2024-06-14 11:29:58,652 INFO L125 PetriNetUnfolderBase]: For 57252/57264 co-relation queries the response was YES. [2024-06-14 11:29:58,678 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35353 conditions, 7109 events. 4767/7109 cut-off events. For 57252/57264 co-relation queries the response was YES. Maximal size of possible extension queue 311. Compared 40784 event pairs, 1749 based on Foata normal form. 14/7084 useless extension candidates. Maximal degree in co-relation 35307. Up to 6294 conditions per place. [2024-06-14 11:29:58,710 INFO L140 encePairwiseOnDemand]: 40/50 looper letters, 98 selfloop transitions, 45 changer transitions 0/159 dead transitions. [2024-06-14 11:29:58,710 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 159 transitions, 1704 flow [2024-06-14 11:29:58,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 11:29:58,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 11:29:58,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 155 transitions. [2024-06-14 11:29:58,712 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.62 [2024-06-14 11:29:58,712 INFO L175 Difference]: Start difference. First operand has 98 places, 124 transitions, 1168 flow. Second operand 5 states and 155 transitions. [2024-06-14 11:29:58,712 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 159 transitions, 1704 flow [2024-06-14 11:29:58,814 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 159 transitions, 1654 flow, removed 17 selfloop flow, removed 1 redundant places. [2024-06-14 11:29:58,819 INFO L231 Difference]: Finished difference. Result has 103 places, 138 transitions, 1399 flow [2024-06-14 11:29:58,819 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=1124, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=124, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1399, PETRI_PLACES=103, PETRI_TRANSITIONS=138} [2024-06-14 11:29:58,820 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 50 predicate places. [2024-06-14 11:29:58,820 INFO L495 AbstractCegarLoop]: Abstraction has has 103 places, 138 transitions, 1399 flow [2024-06-14 11:29:58,821 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.5) internal successors, (117), 6 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:29:58,821 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:29:58,821 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:29:58,822 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-14 11:29:58,822 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 11:29:58,822 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:29:58,822 INFO L85 PathProgramCache]: Analyzing trace with hash -1287758283, now seen corresponding path program 1 times [2024-06-14 11:29:58,822 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:29:58,823 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2047145798] [2024-06-14 11:29:58,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:29:58,823 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:29:58,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:29:58,967 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:29:58,967 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:29:58,967 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2047145798] [2024-06-14 11:29:58,968 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2047145798] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:29:58,968 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:29:58,968 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 11:29:58,968 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [537615685] [2024-06-14 11:29:58,968 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:29:58,968 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 11:29:58,969 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:29:58,969 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 11:29:58,969 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-14 11:29:59,001 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 50 [2024-06-14 11:29:59,002 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 138 transitions, 1399 flow. Second operand has 6 states, 6 states have (on average 18.5) internal successors, (111), 6 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) [2024-06-14 11:29:59,002 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:29:59,003 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 50 [2024-06-14 11:29:59,006 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:29:59,711 INFO L124 PetriNetUnfolderBase]: 5026/7497 cut-off events. [2024-06-14 11:29:59,711 INFO L125 PetriNetUnfolderBase]: For 65282/65294 co-relation queries the response was YES. [2024-06-14 11:29:59,736 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39264 conditions, 7497 events. 5026/7497 cut-off events. For 65282/65294 co-relation queries the response was YES. Maximal size of possible extension queue 316. Compared 42893 event pairs, 1724 based on Foata normal form. 6/7495 useless extension candidates. Maximal degree in co-relation 39215. Up to 6839 conditions per place. [2024-06-14 11:29:59,763 INFO L140 encePairwiseOnDemand]: 39/50 looper letters, 157 selfloop transitions, 32 changer transitions 0/197 dead transitions. [2024-06-14 11:29:59,763 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 197 transitions, 2277 flow [2024-06-14 11:29:59,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 11:29:59,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 11:29:59,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 182 transitions. [2024-06-14 11:29:59,764 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6066666666666667 [2024-06-14 11:29:59,764 INFO L175 Difference]: Start difference. First operand has 103 places, 138 transitions, 1399 flow. Second operand 6 states and 182 transitions. [2024-06-14 11:29:59,764 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 197 transitions, 2277 flow [2024-06-14 11:29:59,847 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 197 transitions, 2207 flow, removed 35 selfloop flow, removed 0 redundant places. [2024-06-14 11:29:59,850 INFO L231 Difference]: Finished difference. Result has 111 places, 158 transitions, 1655 flow [2024-06-14 11:29:59,851 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=1349, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=138, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=114, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1655, PETRI_PLACES=111, PETRI_TRANSITIONS=158} [2024-06-14 11:29:59,851 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 58 predicate places. [2024-06-14 11:29:59,851 INFO L495 AbstractCegarLoop]: Abstraction has has 111 places, 158 transitions, 1655 flow [2024-06-14 11:29:59,852 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.5) internal successors, (111), 6 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) [2024-06-14 11:29:59,852 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:29:59,852 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:29:59,852 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-14 11:29:59,852 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 11:29:59,853 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:29:59,853 INFO L85 PathProgramCache]: Analyzing trace with hash -1115810583, now seen corresponding path program 2 times [2024-06-14 11:29:59,853 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:29:59,853 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [614150236] [2024-06-14 11:29:59,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:29:59,853 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:29:59,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:29:59,992 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:29:59,993 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:29:59,993 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [614150236] [2024-06-14 11:29:59,993 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [614150236] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:29:59,993 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:29:59,993 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 11:29:59,993 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [209706793] [2024-06-14 11:29:59,994 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:29:59,994 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 11:29:59,994 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:29:59,994 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 11:29:59,995 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-14 11:30:00,034 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 50 [2024-06-14 11:30:00,035 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 158 transitions, 1655 flow. Second operand has 6 states, 6 states have (on average 18.5) internal successors, (111), 6 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) [2024-06-14 11:30:00,035 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:30:00,035 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 50 [2024-06-14 11:30:00,035 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:30:00,792 INFO L124 PetriNetUnfolderBase]: 5063/7555 cut-off events. [2024-06-14 11:30:00,792 INFO L125 PetriNetUnfolderBase]: For 71489/71501 co-relation queries the response was YES. [2024-06-14 11:30:00,815 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40428 conditions, 7555 events. 5063/7555 cut-off events. For 71489/71501 co-relation queries the response was YES. Maximal size of possible extension queue 320. Compared 43207 event pairs, 1720 based on Foata normal form. 11/7558 useless extension candidates. Maximal degree in co-relation 40374. Up to 6911 conditions per place. [2024-06-14 11:30:00,840 INFO L140 encePairwiseOnDemand]: 39/50 looper letters, 166 selfloop transitions, 35 changer transitions 0/209 dead transitions. [2024-06-14 11:30:00,840 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 209 transitions, 2469 flow [2024-06-14 11:30:00,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:30:00,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:30:00,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 206 transitions. [2024-06-14 11:30:00,842 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5885714285714285 [2024-06-14 11:30:00,842 INFO L175 Difference]: Start difference. First operand has 111 places, 158 transitions, 1655 flow. Second operand 7 states and 206 transitions. [2024-06-14 11:30:00,842 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 209 transitions, 2469 flow [2024-06-14 11:30:00,931 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 209 transitions, 2375 flow, removed 41 selfloop flow, removed 1 redundant places. [2024-06-14 11:30:00,934 INFO L231 Difference]: Finished difference. Result has 118 places, 170 transitions, 1810 flow [2024-06-14 11:30:00,934 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=1581, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=158, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=132, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1810, PETRI_PLACES=118, PETRI_TRANSITIONS=170} [2024-06-14 11:30:00,935 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 65 predicate places. [2024-06-14 11:30:00,935 INFO L495 AbstractCegarLoop]: Abstraction has has 118 places, 170 transitions, 1810 flow [2024-06-14 11:30:00,935 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.5) internal successors, (111), 6 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) [2024-06-14 11:30:00,935 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:30:00,936 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:30:00,936 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-14 11:30:00,936 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 11:30:00,936 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:30:00,936 INFO L85 PathProgramCache]: Analyzing trace with hash -1116017973, now seen corresponding path program 3 times [2024-06-14 11:30:00,937 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:30:00,937 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1926959496] [2024-06-14 11:30:00,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:30:00,937 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:30:00,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:30:01,068 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:30:01,069 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:30:01,069 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1926959496] [2024-06-14 11:30:01,069 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1926959496] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:30:01,069 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:30:01,069 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 11:30:01,069 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [604742634] [2024-06-14 11:30:01,070 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:30:01,070 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 11:30:01,070 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:30:01,071 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 11:30:01,071 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-14 11:30:01,117 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 50 [2024-06-14 11:30:01,117 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 170 transitions, 1810 flow. Second operand has 6 states, 6 states have (on average 18.5) internal successors, (111), 6 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) [2024-06-14 11:30:01,117 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:30:01,117 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 50 [2024-06-14 11:30:01,117 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:30:01,844 INFO L124 PetriNetUnfolderBase]: 5055/7545 cut-off events. [2024-06-14 11:30:01,844 INFO L125 PetriNetUnfolderBase]: For 79915/79924 co-relation queries the response was YES. [2024-06-14 11:30:01,881 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41365 conditions, 7545 events. 5055/7545 cut-off events. For 79915/79924 co-relation queries the response was YES. Maximal size of possible extension queue 320. Compared 43129 event pairs, 1725 based on Foata normal form. 5/7542 useless extension candidates. Maximal degree in co-relation 41308. Up to 6905 conditions per place. [2024-06-14 11:30:01,910 INFO L140 encePairwiseOnDemand]: 39/50 looper letters, 160 selfloop transitions, 31 changer transitions 0/199 dead transitions. [2024-06-14 11:30:01,910 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 122 places, 199 transitions, 2384 flow [2024-06-14 11:30:01,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 11:30:01,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 11:30:01,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 154 transitions. [2024-06-14 11:30:01,912 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.616 [2024-06-14 11:30:01,912 INFO L175 Difference]: Start difference. First operand has 118 places, 170 transitions, 1810 flow. Second operand 5 states and 154 transitions. [2024-06-14 11:30:01,912 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 122 places, 199 transitions, 2384 flow [2024-06-14 11:30:02,026 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 199 transitions, 2293 flow, removed 32 selfloop flow, removed 2 redundant places. [2024-06-14 11:30:02,029 INFO L231 Difference]: Finished difference. Result has 121 places, 170 transitions, 1792 flow [2024-06-14 11:30:02,029 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=1719, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=170, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=139, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1792, PETRI_PLACES=121, PETRI_TRANSITIONS=170} [2024-06-14 11:30:02,029 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 68 predicate places. [2024-06-14 11:30:02,029 INFO L495 AbstractCegarLoop]: Abstraction has has 121 places, 170 transitions, 1792 flow [2024-06-14 11:30:02,030 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.5) internal successors, (111), 6 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) [2024-06-14 11:30:02,030 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:30:02,030 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:30:02,030 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-14 11:30:02,030 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 11:30:02,031 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:30:02,031 INFO L85 PathProgramCache]: Analyzing trace with hash -1115802647, now seen corresponding path program 1 times [2024-06-14 11:30:02,031 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:30:02,031 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1290988342] [2024-06-14 11:30:02,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:30:02,031 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:30:02,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:30:02,198 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:30:02,198 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:30:02,198 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1290988342] [2024-06-14 11:30:02,198 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1290988342] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:30:02,198 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:30:02,199 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 11:30:02,199 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [404154797] [2024-06-14 11:30:02,199 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:30:02,200 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 11:30:02,201 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:30:02,201 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 11:30:02,202 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-14 11:30:02,251 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 50 [2024-06-14 11:30:02,252 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 121 places, 170 transitions, 1792 flow. Second operand has 6 states, 6 states have (on average 19.5) internal successors, (117), 6 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:30:02,252 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:30:02,252 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 50 [2024-06-14 11:30:02,252 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:30:02,947 INFO L124 PetriNetUnfolderBase]: 4877/7369 cut-off events. [2024-06-14 11:30:02,947 INFO L125 PetriNetUnfolderBase]: For 84375/84384 co-relation queries the response was YES. [2024-06-14 11:30:02,978 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40526 conditions, 7369 events. 4877/7369 cut-off events. For 84375/84384 co-relation queries the response was YES. Maximal size of possible extension queue 324. Compared 43061 event pairs, 1706 based on Foata normal form. 18/7364 useless extension candidates. Maximal degree in co-relation 40466. Up to 6550 conditions per place. [2024-06-14 11:30:03,006 INFO L140 encePairwiseOnDemand]: 41/50 looper letters, 166 selfloop transitions, 18 changer transitions 0/200 dead transitions. [2024-06-14 11:30:03,006 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 125 places, 200 transitions, 2356 flow [2024-06-14 11:30:03,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 11:30:03,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 11:30:03,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 154 transitions. [2024-06-14 11:30:03,007 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.616 [2024-06-14 11:30:03,007 INFO L175 Difference]: Start difference. First operand has 121 places, 170 transitions, 1792 flow. Second operand 5 states and 154 transitions. [2024-06-14 11:30:03,007 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 125 places, 200 transitions, 2356 flow [2024-06-14 11:30:03,149 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 121 places, 200 transitions, 2294 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-06-14 11:30:03,151 INFO L231 Difference]: Finished difference. Result has 122 places, 173 transitions, 1825 flow [2024-06-14 11:30:03,151 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=1730, PETRI_DIFFERENCE_MINUEND_PLACES=117, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=170, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=152, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1825, PETRI_PLACES=122, PETRI_TRANSITIONS=173} [2024-06-14 11:30:03,151 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 69 predicate places. [2024-06-14 11:30:03,152 INFO L495 AbstractCegarLoop]: Abstraction has has 122 places, 173 transitions, 1825 flow [2024-06-14 11:30:03,152 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.5) internal successors, (117), 6 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:30:03,152 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:30:03,152 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:30:03,152 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-14 11:30:03,152 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 11:30:03,152 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:30:03,152 INFO L85 PathProgramCache]: Analyzing trace with hash 1904106444, now seen corresponding path program 1 times [2024-06-14 11:30:03,152 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:30:03,153 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1426439723] [2024-06-14 11:30:03,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:30:03,153 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:30:03,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:30:03,283 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:30:03,283 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:30:03,283 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1426439723] [2024-06-14 11:30:03,284 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1426439723] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:30:03,284 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:30:03,284 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-14 11:30:03,284 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2003591759] [2024-06-14 11:30:03,284 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:30:03,285 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-14 11:30:03,286 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:30:03,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-14 11:30:03,286 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-14 11:30:03,325 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 50 [2024-06-14 11:30:03,325 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 173 transitions, 1825 flow. Second operand has 4 states, 4 states have (on average 22.0) internal successors, (88), 4 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:30:03,325 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:30:03,326 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 50 [2024-06-14 11:30:03,326 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:30:03,994 INFO L124 PetriNetUnfolderBase]: 4582/6927 cut-off events. [2024-06-14 11:30:03,994 INFO L125 PetriNetUnfolderBase]: For 99231/99409 co-relation queries the response was YES. [2024-06-14 11:30:04,020 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40017 conditions, 6927 events. 4582/6927 cut-off events. For 99231/99409 co-relation queries the response was YES. Maximal size of possible extension queue 318. Compared 40969 event pairs, 1605 based on Foata normal form. 16/6792 useless extension candidates. Maximal degree in co-relation 39956. Up to 6088 conditions per place. [2024-06-14 11:30:04,046 INFO L140 encePairwiseOnDemand]: 42/50 looper letters, 140 selfloop transitions, 16 changer transitions 0/186 dead transitions. [2024-06-14 11:30:04,047 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 125 places, 186 transitions, 2193 flow [2024-06-14 11:30:04,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-14 11:30:04,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-14 11:30:04,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 123 transitions. [2024-06-14 11:30:04,048 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.615 [2024-06-14 11:30:04,048 INFO L175 Difference]: Start difference. First operand has 122 places, 173 transitions, 1825 flow. Second operand 4 states and 123 transitions. [2024-06-14 11:30:04,048 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 125 places, 186 transitions, 2193 flow [2024-06-14 11:30:04,170 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 186 transitions, 2128 flow, removed 17 selfloop flow, removed 3 redundant places. [2024-06-14 11:30:04,172 INFO L231 Difference]: Finished difference. Result has 124 places, 175 transitions, 1846 flow [2024-06-14 11:30:04,172 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=1760, PETRI_DIFFERENCE_MINUEND_PLACES=119, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=173, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=157, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1846, PETRI_PLACES=124, PETRI_TRANSITIONS=175} [2024-06-14 11:30:04,172 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 71 predicate places. [2024-06-14 11:30:04,172 INFO L495 AbstractCegarLoop]: Abstraction has has 124 places, 175 transitions, 1846 flow [2024-06-14 11:30:04,172 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 22.0) internal successors, (88), 4 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:30:04,172 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:30:04,173 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:30:04,173 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-14 11:30:04,173 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 11:30:04,173 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:30:04,173 INFO L85 PathProgramCache]: Analyzing trace with hash 521689447, now seen corresponding path program 1 times [2024-06-14 11:30:04,173 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:30:04,174 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [338332598] [2024-06-14 11:30:04,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:30:04,174 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:30:04,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:30:04,310 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:30:04,310 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:30:04,310 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [338332598] [2024-06-14 11:30:04,310 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [338332598] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:30:04,311 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:30:04,311 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 11:30:04,311 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [814586763] [2024-06-14 11:30:04,311 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:30:04,311 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 11:30:04,312 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:30:04,312 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 11:30:04,312 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-14 11:30:04,360 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 50 [2024-06-14 11:30:04,360 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 124 places, 175 transitions, 1846 flow. Second operand has 6 states, 6 states have (on average 19.5) internal successors, (117), 6 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:30:04,360 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:30:04,360 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 50 [2024-06-14 11:30:04,361 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:30:05,146 INFO L124 PetriNetUnfolderBase]: 4960/7388 cut-off events. [2024-06-14 11:30:05,146 INFO L125 PetriNetUnfolderBase]: For 101713/101737 co-relation queries the response was YES. [2024-06-14 11:30:05,178 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42517 conditions, 7388 events. 4960/7388 cut-off events. For 101713/101737 co-relation queries the response was YES. Maximal size of possible extension queue 319. Compared 42292 event pairs, 1487 based on Foata normal form. 17/7396 useless extension candidates. Maximal degree in co-relation 42454. Up to 6430 conditions per place. [2024-06-14 11:30:05,207 INFO L140 encePairwiseOnDemand]: 41/50 looper letters, 156 selfloop transitions, 41 changer transitions 0/215 dead transitions. [2024-06-14 11:30:05,207 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 129 places, 215 transitions, 2534 flow [2024-06-14 11:30:05,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 11:30:05,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 11:30:05,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 182 transitions. [2024-06-14 11:30:05,208 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6066666666666667 [2024-06-14 11:30:05,208 INFO L175 Difference]: Start difference. First operand has 124 places, 175 transitions, 1846 flow. Second operand 6 states and 182 transitions. [2024-06-14 11:30:05,208 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 129 places, 215 transitions, 2534 flow [2024-06-14 11:30:05,532 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 215 transitions, 2516 flow, removed 3 selfloop flow, removed 1 redundant places. [2024-06-14 11:30:05,534 INFO L231 Difference]: Finished difference. Result has 130 places, 183 transitions, 2091 flow [2024-06-14 11:30:05,535 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=1828, PETRI_DIFFERENCE_MINUEND_PLACES=123, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=175, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=137, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2091, PETRI_PLACES=130, PETRI_TRANSITIONS=183} [2024-06-14 11:30:05,535 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 77 predicate places. [2024-06-14 11:30:05,535 INFO L495 AbstractCegarLoop]: Abstraction has has 130 places, 183 transitions, 2091 flow [2024-06-14 11:30:05,535 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.5) internal successors, (117), 6 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:30:05,535 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:30:05,535 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:30:05,535 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-14 11:30:05,536 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 11:30:05,536 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:30:05,536 INFO L85 PathProgramCache]: Analyzing trace with hash 524546407, now seen corresponding path program 2 times [2024-06-14 11:30:05,536 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:30:05,536 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1916409962] [2024-06-14 11:30:05,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:30:05,537 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:30:05,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:30:05,697 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:30:05,698 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:30:05,698 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1916409962] [2024-06-14 11:30:05,698 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1916409962] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:30:05,698 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:30:05,699 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 11:30:05,699 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1283994837] [2024-06-14 11:30:05,699 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:30:05,700 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 11:30:05,700 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:30:05,701 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 11:30:05,701 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-14 11:30:05,747 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 50 [2024-06-14 11:30:05,748 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 130 places, 183 transitions, 2091 flow. Second operand has 6 states, 6 states have (on average 19.5) internal successors, (117), 6 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:30:05,748 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:30:05,748 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 50 [2024-06-14 11:30:05,748 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:30:06,736 INFO L124 PetriNetUnfolderBase]: 4936/7356 cut-off events. [2024-06-14 11:30:06,736 INFO L125 PetriNetUnfolderBase]: For 113538/113552 co-relation queries the response was YES. [2024-06-14 11:30:06,774 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43765 conditions, 7356 events. 4936/7356 cut-off events. For 113538/113552 co-relation queries the response was YES. Maximal size of possible extension queue 317. Compared 42125 event pairs, 1649 based on Foata normal form. 17/7364 useless extension candidates. Maximal degree in co-relation 43699. Up to 6556 conditions per place. [2024-06-14 11:30:06,808 INFO L140 encePairwiseOnDemand]: 41/50 looper letters, 157 selfloop transitions, 34 changer transitions 0/209 dead transitions. [2024-06-14 11:30:06,808 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 135 places, 209 transitions, 2539 flow [2024-06-14 11:30:06,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 11:30:06,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 11:30:06,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 176 transitions. [2024-06-14 11:30:06,810 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5866666666666667 [2024-06-14 11:30:06,810 INFO L175 Difference]: Start difference. First operand has 130 places, 183 transitions, 2091 flow. Second operand 6 states and 176 transitions. [2024-06-14 11:30:06,810 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 135 places, 209 transitions, 2539 flow [2024-06-14 11:30:07,099 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 132 places, 209 transitions, 2373 flow, removed 54 selfloop flow, removed 3 redundant places. [2024-06-14 11:30:07,102 INFO L231 Difference]: Finished difference. Result has 133 places, 183 transitions, 2002 flow [2024-06-14 11:30:07,103 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=1925, PETRI_DIFFERENCE_MINUEND_PLACES=127, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=183, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=149, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2002, PETRI_PLACES=133, PETRI_TRANSITIONS=183} [2024-06-14 11:30:07,103 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 80 predicate places. [2024-06-14 11:30:07,103 INFO L495 AbstractCegarLoop]: Abstraction has has 133 places, 183 transitions, 2002 flow [2024-06-14 11:30:07,103 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.5) internal successors, (117), 6 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:30:07,104 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:30:07,104 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:30:07,104 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-14 11:30:07,104 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 11:30:07,104 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:30:07,104 INFO L85 PathProgramCache]: Analyzing trace with hash -1028030029, now seen corresponding path program 1 times [2024-06-14 11:30:07,105 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:30:07,105 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [95834459] [2024-06-14 11:30:07,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:30:07,105 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:30:07,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:30:07,268 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:30:07,268 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:30:07,268 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [95834459] [2024-06-14 11:30:07,269 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [95834459] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:30:07,269 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:30:07,269 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:30:07,269 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1268804628] [2024-06-14 11:30:07,269 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:30:07,269 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:30:07,270 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:30:07,270 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:30:07,270 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:30:07,317 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 50 [2024-06-14 11:30:07,317 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 133 places, 183 transitions, 2002 flow. Second operand has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:30:07,317 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:30:07,317 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 50 [2024-06-14 11:30:07,317 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:30:08,242 INFO L124 PetriNetUnfolderBase]: 5109/7558 cut-off events. [2024-06-14 11:30:08,242 INFO L125 PetriNetUnfolderBase]: For 118256/118268 co-relation queries the response was YES. [2024-06-14 11:30:08,271 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44609 conditions, 7558 events. 5109/7558 cut-off events. For 118256/118268 co-relation queries the response was YES. Maximal size of possible extension queue 321. Compared 42919 event pairs, 1670 based on Foata normal form. 8/7553 useless extension candidates. Maximal degree in co-relation 44542. Up to 6895 conditions per place. [2024-06-14 11:30:08,297 INFO L140 encePairwiseOnDemand]: 40/50 looper letters, 154 selfloop transitions, 48 changer transitions 0/210 dead transitions. [2024-06-14 11:30:08,297 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 137 places, 210 transitions, 2544 flow [2024-06-14 11:30:08,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 11:30:08,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 11:30:08,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 153 transitions. [2024-06-14 11:30:08,298 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.612 [2024-06-14 11:30:08,298 INFO L175 Difference]: Start difference. First operand has 133 places, 183 transitions, 2002 flow. Second operand 5 states and 153 transitions. [2024-06-14 11:30:08,298 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 137 places, 210 transitions, 2544 flow [2024-06-14 11:30:08,440 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 133 places, 210 transitions, 2471 flow, removed 5 selfloop flow, removed 4 redundant places. [2024-06-14 11:30:08,442 INFO L231 Difference]: Finished difference. Result has 134 places, 187 transitions, 2122 flow [2024-06-14 11:30:08,443 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=1929, PETRI_DIFFERENCE_MINUEND_PLACES=129, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=183, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=135, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=2122, PETRI_PLACES=134, PETRI_TRANSITIONS=187} [2024-06-14 11:30:08,443 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 81 predicate places. [2024-06-14 11:30:08,443 INFO L495 AbstractCegarLoop]: Abstraction has has 134 places, 187 transitions, 2122 flow [2024-06-14 11:30:08,443 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:30:08,443 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:30:08,443 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:30:08,443 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-14 11:30:08,444 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 11:30:08,444 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:30:08,444 INFO L85 PathProgramCache]: Analyzing trace with hash -1602512663, now seen corresponding path program 2 times [2024-06-14 11:30:08,444 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:30:08,444 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1804160402] [2024-06-14 11:30:08,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:30:08,444 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:30:08,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:30:08,590 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:30:08,591 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:30:08,591 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1804160402] [2024-06-14 11:30:08,591 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1804160402] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:30:08,591 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:30:08,591 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:30:08,592 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1444309688] [2024-06-14 11:30:08,592 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:30:08,592 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:30:08,592 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:30:08,593 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:30:08,593 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:30:08,653 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 50 [2024-06-14 11:30:08,653 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 134 places, 187 transitions, 2122 flow. Second operand has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:30:08,653 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:30:08,653 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 50 [2024-06-14 11:30:08,654 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:30:09,388 INFO L124 PetriNetUnfolderBase]: 5125/7640 cut-off events. [2024-06-14 11:30:09,388 INFO L125 PetriNetUnfolderBase]: For 132960/132972 co-relation queries the response was YES. [2024-06-14 11:30:09,422 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46471 conditions, 7640 events. 5125/7640 cut-off events. For 132960/132972 co-relation queries the response was YES. Maximal size of possible extension queue 324. Compared 43966 event pairs, 1670 based on Foata normal form. 8/7635 useless extension candidates. Maximal degree in co-relation 46403. Up to 6876 conditions per place. [2024-06-14 11:30:09,451 INFO L140 encePairwiseOnDemand]: 40/50 looper letters, 162 selfloop transitions, 57 changer transitions 0/227 dead transitions. [2024-06-14 11:30:09,451 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 139 places, 227 transitions, 2886 flow [2024-06-14 11:30:09,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 11:30:09,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 11:30:09,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 181 transitions. [2024-06-14 11:30:09,453 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6033333333333334 [2024-06-14 11:30:09,453 INFO L175 Difference]: Start difference. First operand has 134 places, 187 transitions, 2122 flow. Second operand 6 states and 181 transitions. [2024-06-14 11:30:09,453 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 139 places, 227 transitions, 2886 flow [2024-06-14 11:30:09,677 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 136 places, 227 transitions, 2753 flow, removed 25 selfloop flow, removed 3 redundant places. [2024-06-14 11:30:09,681 INFO L231 Difference]: Finished difference. Result has 137 places, 195 transitions, 2280 flow [2024-06-14 11:30:09,681 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=1989, PETRI_DIFFERENCE_MINUEND_PLACES=131, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=187, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=134, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2280, PETRI_PLACES=137, PETRI_TRANSITIONS=195} [2024-06-14 11:30:09,681 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 84 predicate places. [2024-06-14 11:30:09,681 INFO L495 AbstractCegarLoop]: Abstraction has has 137 places, 195 transitions, 2280 flow [2024-06-14 11:30:09,682 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:30:09,682 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:30:09,682 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:30:09,682 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-14 11:30:09,682 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 11:30:09,683 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:30:09,683 INFO L85 PathProgramCache]: Analyzing trace with hash -1602243893, now seen corresponding path program 3 times [2024-06-14 11:30:09,683 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:30:09,683 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [77969956] [2024-06-14 11:30:09,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:30:09,683 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:30:09,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:30:09,837 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:30:09,837 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:30:09,837 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [77969956] [2024-06-14 11:30:09,838 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [77969956] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:30:09,838 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:30:09,838 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:30:09,838 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [52278601] [2024-06-14 11:30:09,838 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:30:09,839 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:30:09,839 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:30:09,839 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:30:09,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:30:09,879 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 50 [2024-06-14 11:30:09,880 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 137 places, 195 transitions, 2280 flow. Second operand has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:30:09,880 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:30:09,880 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 50 [2024-06-14 11:30:09,880 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:30:10,781 INFO L124 PetriNetUnfolderBase]: 5141/7666 cut-off events. [2024-06-14 11:30:10,781 INFO L125 PetriNetUnfolderBase]: For 148680/148692 co-relation queries the response was YES. [2024-06-14 11:30:10,810 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48224 conditions, 7666 events. 5141/7666 cut-off events. For 148680/148692 co-relation queries the response was YES. Maximal size of possible extension queue 325. Compared 44140 event pairs, 1670 based on Foata normal form. 8/7661 useless extension candidates. Maximal degree in co-relation 48155. Up to 6893 conditions per place. [2024-06-14 11:30:10,844 INFO L140 encePairwiseOnDemand]: 40/50 looper letters, 158 selfloop transitions, 62 changer transitions 0/228 dead transitions. [2024-06-14 11:30:10,845 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 142 places, 228 transitions, 2970 flow [2024-06-14 11:30:10,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 11:30:10,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 11:30:10,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 179 transitions. [2024-06-14 11:30:10,846 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5966666666666667 [2024-06-14 11:30:10,846 INFO L175 Difference]: Start difference. First operand has 137 places, 195 transitions, 2280 flow. Second operand 6 states and 179 transitions. [2024-06-14 11:30:10,846 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 142 places, 228 transitions, 2970 flow [2024-06-14 11:30:11,113 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 140 places, 228 transitions, 2807 flow, removed 56 selfloop flow, removed 2 redundant places. [2024-06-14 11:30:11,116 INFO L231 Difference]: Finished difference. Result has 141 places, 199 transitions, 2338 flow [2024-06-14 11:30:11,116 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=2137, PETRI_DIFFERENCE_MINUEND_PLACES=135, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=195, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=137, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2338, PETRI_PLACES=141, PETRI_TRANSITIONS=199} [2024-06-14 11:30:11,117 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 88 predicate places. [2024-06-14 11:30:11,117 INFO L495 AbstractCegarLoop]: Abstraction has has 141 places, 199 transitions, 2338 flow [2024-06-14 11:30:11,117 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:30:11,117 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:30:11,117 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:30:11,118 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-14 11:30:11,118 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 11:30:11,118 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:30:11,118 INFO L85 PathProgramCache]: Analyzing trace with hash -912469748, now seen corresponding path program 1 times [2024-06-14 11:30:11,118 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:30:11,119 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1126058424] [2024-06-14 11:30:11,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:30:11,119 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:30:11,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:30:11,288 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:30:11,288 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:30:11,289 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1126058424] [2024-06-14 11:30:11,289 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1126058424] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:30:11,289 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:30:11,289 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:30:11,289 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1981658220] [2024-06-14 11:30:11,289 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:30:11,290 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:30:11,290 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:30:11,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:30:11,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:30:11,336 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 50 [2024-06-14 11:30:11,336 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 141 places, 199 transitions, 2338 flow. Second operand has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:30:11,336 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:30:11,336 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 50 [2024-06-14 11:30:11,336 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:30:12,176 INFO L124 PetriNetUnfolderBase]: 5245/7843 cut-off events. [2024-06-14 11:30:12,176 INFO L125 PetriNetUnfolderBase]: For 156910/156928 co-relation queries the response was YES. [2024-06-14 11:30:12,212 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49799 conditions, 7843 events. 5245/7843 cut-off events. For 156910/156928 co-relation queries the response was YES. Maximal size of possible extension queue 337. Compared 45235 event pairs, 1658 based on Foata normal form. 15/7849 useless extension candidates. Maximal degree in co-relation 49728. Up to 6951 conditions per place. [2024-06-14 11:30:12,245 INFO L140 encePairwiseOnDemand]: 38/50 looper letters, 174 selfloop transitions, 84 changer transitions 0/266 dead transitions. [2024-06-14 11:30:12,245 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 149 places, 266 transitions, 3525 flow [2024-06-14 11:30:12,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 11:30:12,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 11:30:12,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 259 transitions. [2024-06-14 11:30:12,246 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5755555555555556 [2024-06-14 11:30:12,246 INFO L175 Difference]: Start difference. First operand has 141 places, 199 transitions, 2338 flow. Second operand 9 states and 259 transitions. [2024-06-14 11:30:12,247 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 149 places, 266 transitions, 3525 flow [2024-06-14 11:30:12,638 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 146 places, 266 transitions, 3386 flow, removed 26 selfloop flow, removed 3 redundant places. [2024-06-14 11:30:12,642 INFO L231 Difference]: Finished difference. Result has 150 places, 223 transitions, 2766 flow [2024-06-14 11:30:12,642 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=2199, PETRI_DIFFERENCE_MINUEND_PLACES=138, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=199, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=124, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2766, PETRI_PLACES=150, PETRI_TRANSITIONS=223} [2024-06-14 11:30:12,643 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 97 predicate places. [2024-06-14 11:30:12,643 INFO L495 AbstractCegarLoop]: Abstraction has has 150 places, 223 transitions, 2766 flow [2024-06-14 11:30:12,643 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:30:12,643 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:30:12,643 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:30:12,643 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-14 11:30:12,644 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 11:30:12,644 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:30:12,644 INFO L85 PathProgramCache]: Analyzing trace with hash -934067158, now seen corresponding path program 2 times [2024-06-14 11:30:12,644 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:30:12,644 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2105214841] [2024-06-14 11:30:12,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:30:12,645 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:30:12,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:30:12,816 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:30:12,816 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:30:12,816 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2105214841] [2024-06-14 11:30:12,816 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2105214841] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:30:12,816 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:30:12,816 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:30:12,817 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1899768919] [2024-06-14 11:30:12,817 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:30:12,817 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:30:12,817 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:30:12,818 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:30:12,818 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:30:12,873 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 50 [2024-06-14 11:30:12,873 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 150 places, 223 transitions, 2766 flow. Second operand has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:30:12,873 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:30:12,873 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 50 [2024-06-14 11:30:12,873 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:30:13,759 INFO L124 PetriNetUnfolderBase]: 5447/8140 cut-off events. [2024-06-14 11:30:13,760 INFO L125 PetriNetUnfolderBase]: For 183386/183398 co-relation queries the response was YES. [2024-06-14 11:30:13,799 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55055 conditions, 8140 events. 5447/8140 cut-off events. For 183386/183398 co-relation queries the response was YES. Maximal size of possible extension queue 356. Compared 47042 event pairs, 1670 based on Foata normal form. 12/8139 useless extension candidates. Maximal degree in co-relation 54980. Up to 7136 conditions per place. [2024-06-14 11:30:13,832 INFO L140 encePairwiseOnDemand]: 37/50 looper letters, 181 selfloop transitions, 92 changer transitions 0/281 dead transitions. [2024-06-14 11:30:13,833 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 155 places, 281 transitions, 4040 flow [2024-06-14 11:30:13,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 11:30:13,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 11:30:13,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 188 transitions. [2024-06-14 11:30:13,834 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6266666666666667 [2024-06-14 11:30:13,834 INFO L175 Difference]: Start difference. First operand has 150 places, 223 transitions, 2766 flow. Second operand 6 states and 188 transitions. [2024-06-14 11:30:13,834 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 155 places, 281 transitions, 4040 flow [2024-06-14 11:30:14,177 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 152 places, 281 transitions, 3856 flow, removed 69 selfloop flow, removed 3 redundant places. [2024-06-14 11:30:14,180 INFO L231 Difference]: Finished difference. Result has 154 places, 249 transitions, 3309 flow [2024-06-14 11:30:14,180 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=2619, PETRI_DIFFERENCE_MINUEND_PLACES=147, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=223, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=139, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3309, PETRI_PLACES=154, PETRI_TRANSITIONS=249} [2024-06-14 11:30:14,181 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 101 predicate places. [2024-06-14 11:30:14,181 INFO L495 AbstractCegarLoop]: Abstraction has has 154 places, 249 transitions, 3309 flow [2024-06-14 11:30:14,181 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:30:14,181 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:30:14,181 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:30:14,181 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-14 11:30:14,181 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 11:30:14,181 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:30:14,182 INFO L85 PathProgramCache]: Analyzing trace with hash -934067499, now seen corresponding path program 4 times [2024-06-14 11:30:14,182 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:30:14,182 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [412737027] [2024-06-14 11:30:14,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:30:14,182 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:30:14,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:30:14,326 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:30:14,327 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:30:14,327 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [412737027] [2024-06-14 11:30:14,327 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [412737027] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:30:14,327 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:30:14,327 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:30:14,327 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1142537258] [2024-06-14 11:30:14,327 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:30:14,328 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:30:14,328 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:30:14,328 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:30:14,328 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:30:14,362 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 50 [2024-06-14 11:30:14,363 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 154 places, 249 transitions, 3309 flow. Second operand has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:30:14,363 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:30:14,363 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 50 [2024-06-14 11:30:14,363 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:30:15,217 INFO L124 PetriNetUnfolderBase]: 5440/8108 cut-off events. [2024-06-14 11:30:15,217 INFO L125 PetriNetUnfolderBase]: For 206803/206815 co-relation queries the response was YES. [2024-06-14 11:30:15,261 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57832 conditions, 8108 events. 5440/8108 cut-off events. For 206803/206815 co-relation queries the response was YES. Maximal size of possible extension queue 355. Compared 46981 event pairs, 1663 based on Foata normal form. 8/8103 useless extension candidates. Maximal degree in co-relation 57754. Up to 7309 conditions per place. [2024-06-14 11:30:15,298 INFO L140 encePairwiseOnDemand]: 40/50 looper letters, 213 selfloop transitions, 52 changer transitions 0/273 dead transitions. [2024-06-14 11:30:15,298 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 158 places, 273 transitions, 3901 flow [2024-06-14 11:30:15,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 11:30:15,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 11:30:15,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 155 transitions. [2024-06-14 11:30:15,299 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.62 [2024-06-14 11:30:15,299 INFO L175 Difference]: Start difference. First operand has 154 places, 249 transitions, 3309 flow. Second operand 5 states and 155 transitions. [2024-06-14 11:30:15,299 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 158 places, 273 transitions, 3901 flow [2024-06-14 11:30:15,957 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 155 places, 273 transitions, 3695 flow, removed 75 selfloop flow, removed 3 redundant places. [2024-06-14 11:30:15,961 INFO L231 Difference]: Finished difference. Result has 156 places, 249 transitions, 3223 flow [2024-06-14 11:30:15,961 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=3103, PETRI_DIFFERENCE_MINUEND_PLACES=151, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=249, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=197, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=3223, PETRI_PLACES=156, PETRI_TRANSITIONS=249} [2024-06-14 11:30:15,961 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 103 predicate places. [2024-06-14 11:30:15,961 INFO L495 AbstractCegarLoop]: Abstraction has has 156 places, 249 transitions, 3223 flow [2024-06-14 11:30:15,962 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:30:15,962 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:30:15,962 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:30:15,962 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-14 11:30:15,962 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 11:30:15,962 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:30:15,962 INFO L85 PathProgramCache]: Analyzing trace with hash -933859768, now seen corresponding path program 3 times [2024-06-14 11:30:15,962 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:30:15,962 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [392371630] [2024-06-14 11:30:15,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:30:15,963 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:30:15,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:30:16,129 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:30:16,129 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:30:16,129 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [392371630] [2024-06-14 11:30:16,129 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [392371630] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:30:16,130 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:30:16,130 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:30:16,130 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1293287870] [2024-06-14 11:30:16,130 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:30:16,130 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:30:16,131 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:30:16,131 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:30:16,131 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:30:16,165 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 50 [2024-06-14 11:30:16,165 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 156 places, 249 transitions, 3223 flow. Second operand has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:30:16,165 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:30:16,165 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 50 [2024-06-14 11:30:16,165 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:30:17,249 INFO L124 PetriNetUnfolderBase]: 5446/8145 cut-off events. [2024-06-14 11:30:17,249 INFO L125 PetriNetUnfolderBase]: For 201131/201143 co-relation queries the response was YES. [2024-06-14 11:30:17,293 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57443 conditions, 8145 events. 5446/8145 cut-off events. For 201131/201143 co-relation queries the response was YES. Maximal size of possible extension queue 357. Compared 47169 event pairs, 1670 based on Foata normal form. 12/8144 useless extension candidates. Maximal degree in co-relation 57364. Up to 7139 conditions per place. [2024-06-14 11:30:17,336 INFO L140 encePairwiseOnDemand]: 37/50 looper letters, 180 selfloop transitions, 106 changer transitions 0/294 dead transitions. [2024-06-14 11:30:17,336 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 163 places, 294 transitions, 4186 flow [2024-06-14 11:30:17,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:30:17,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:30:17,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 237 transitions. [2024-06-14 11:30:17,338 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5925 [2024-06-14 11:30:17,338 INFO L175 Difference]: Start difference. First operand has 156 places, 249 transitions, 3223 flow. Second operand 8 states and 237 transitions. [2024-06-14 11:30:17,338 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 163 places, 294 transitions, 4186 flow [2024-06-14 11:30:17,823 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 158 places, 294 transitions, 4023 flow, removed 6 selfloop flow, removed 5 redundant places. [2024-06-14 11:30:17,827 INFO L231 Difference]: Finished difference. Result has 159 places, 258 transitions, 3451 flow [2024-06-14 11:30:17,827 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=3072, PETRI_DIFFERENCE_MINUEND_PLACES=151, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=249, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=97, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=151, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3451, PETRI_PLACES=159, PETRI_TRANSITIONS=258} [2024-06-14 11:30:17,828 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 106 predicate places. [2024-06-14 11:30:17,828 INFO L495 AbstractCegarLoop]: Abstraction has has 159 places, 258 transitions, 3451 flow [2024-06-14 11:30:17,828 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:30:17,829 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:30:17,829 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:30:17,829 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-14 11:30:17,829 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 11:30:17,830 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:30:17,830 INFO L85 PathProgramCache]: Analyzing trace with hash -933851832, now seen corresponding path program 1 times [2024-06-14 11:30:17,830 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:30:17,830 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1838157124] [2024-06-14 11:30:17,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:30:17,830 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:30:17,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:30:18,033 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:30:18,033 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:30:18,034 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1838157124] [2024-06-14 11:30:18,034 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1838157124] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:30:18,034 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:30:18,034 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:30:18,034 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [38224692] [2024-06-14 11:30:18,034 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:30:18,035 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:30:18,035 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:30:18,036 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:30:18,036 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:30:18,085 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 50 [2024-06-14 11:30:18,086 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 159 places, 258 transitions, 3451 flow. Second operand has 7 states, 7 states have (on average 19.285714285714285) internal successors, (135), 7 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:30:18,086 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:30:18,086 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 50 [2024-06-14 11:30:18,086 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:30:19,069 INFO L124 PetriNetUnfolderBase]: 5608/8418 cut-off events. [2024-06-14 11:30:19,069 INFO L125 PetriNetUnfolderBase]: For 220666/220709 co-relation queries the response was YES. [2024-06-14 11:30:19,114 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59099 conditions, 8418 events. 5608/8418 cut-off events. For 220666/220709 co-relation queries the response was YES. Maximal size of possible extension queue 373. Compared 49687 event pairs, 1697 based on Foata normal form. 60/8440 useless extension candidates. Maximal degree in co-relation 59019. Up to 6950 conditions per place. [2024-06-14 11:30:19,151 INFO L140 encePairwiseOnDemand]: 40/50 looper letters, 211 selfloop transitions, 49 changer transitions 0/287 dead transitions. [2024-06-14 11:30:19,151 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 164 places, 287 transitions, 4189 flow [2024-06-14 11:30:19,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 11:30:19,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 11:30:19,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 181 transitions. [2024-06-14 11:30:19,152 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6033333333333334 [2024-06-14 11:30:19,152 INFO L175 Difference]: Start difference. First operand has 159 places, 258 transitions, 3451 flow. Second operand 6 states and 181 transitions. [2024-06-14 11:30:19,152 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 164 places, 287 transitions, 4189 flow [2024-06-14 11:30:19,549 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 157 places, 287 transitions, 3899 flow, removed 38 selfloop flow, removed 7 redundant places. [2024-06-14 11:30:19,552 INFO L231 Difference]: Finished difference. Result has 158 places, 260 transitions, 3333 flow [2024-06-14 11:30:19,553 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=3163, PETRI_DIFFERENCE_MINUEND_PLACES=152, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=258, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=209, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3333, PETRI_PLACES=158, PETRI_TRANSITIONS=260} [2024-06-14 11:30:19,553 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 105 predicate places. [2024-06-14 11:30:19,553 INFO L495 AbstractCegarLoop]: Abstraction has has 158 places, 260 transitions, 3333 flow [2024-06-14 11:30:19,553 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.285714285714285) internal successors, (135), 7 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:30:19,554 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:30:19,554 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:30:19,554 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-14 11:30:19,554 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 11:30:19,554 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:30:19,554 INFO L85 PathProgramCache]: Analyzing trace with hash 2086012619, now seen corresponding path program 1 times [2024-06-14 11:30:19,555 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:30:19,555 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1407725167] [2024-06-14 11:30:19,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:30:19,555 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:30:19,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:30:19,690 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:30:19,690 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:30:19,690 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1407725167] [2024-06-14 11:30:19,690 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1407725167] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:30:19,690 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:30:19,691 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-14 11:30:19,691 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [790721838] [2024-06-14 11:30:19,691 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:30:19,691 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-14 11:30:19,691 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:30:19,692 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-14 11:30:19,692 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-06-14 11:30:19,749 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 50 [2024-06-14 11:30:19,750 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 158 places, 260 transitions, 3333 flow. Second operand has 5 states, 5 states have (on average 21.4) internal successors, (107), 5 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:30:19,750 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:30:19,750 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 50 [2024-06-14 11:30:19,750 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:30:20,587 INFO L124 PetriNetUnfolderBase]: 5245/7884 cut-off events. [2024-06-14 11:30:20,587 INFO L125 PetriNetUnfolderBase]: For 221096/221344 co-relation queries the response was YES. [2024-06-14 11:30:20,636 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57114 conditions, 7884 events. 5245/7884 cut-off events. For 221096/221344 co-relation queries the response was YES. Maximal size of possible extension queue 364. Compared 47112 event pairs, 1580 based on Foata normal form. 9/7723 useless extension candidates. Maximal degree in co-relation 57034. Up to 6747 conditions per place. [2024-06-14 11:30:20,674 INFO L140 encePairwiseOnDemand]: 41/50 looper letters, 186 selfloop transitions, 44 changer transitions 0/275 dead transitions. [2024-06-14 11:30:20,674 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 162 places, 275 transitions, 3831 flow [2024-06-14 11:30:20,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 11:30:20,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 11:30:20,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 151 transitions. [2024-06-14 11:30:20,675 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.604 [2024-06-14 11:30:20,675 INFO L175 Difference]: Start difference. First operand has 158 places, 260 transitions, 3333 flow. Second operand 5 states and 151 transitions. [2024-06-14 11:30:20,676 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 162 places, 275 transitions, 3831 flow [2024-06-14 11:30:21,077 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 158 places, 275 transitions, 3703 flow, removed 21 selfloop flow, removed 4 redundant places. [2024-06-14 11:30:21,081 INFO L231 Difference]: Finished difference. Result has 159 places, 260 transitions, 3316 flow [2024-06-14 11:30:21,081 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=3205, PETRI_DIFFERENCE_MINUEND_PLACES=154, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=260, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=216, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=3316, PETRI_PLACES=159, PETRI_TRANSITIONS=260} [2024-06-14 11:30:21,082 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 106 predicate places. [2024-06-14 11:30:21,082 INFO L495 AbstractCegarLoop]: Abstraction has has 159 places, 260 transitions, 3316 flow [2024-06-14 11:30:21,082 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 21.4) internal successors, (107), 5 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:30:21,082 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:30:21,083 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:30:21,083 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-14 11:30:21,083 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 11:30:21,083 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:30:21,083 INFO L85 PathProgramCache]: Analyzing trace with hash -919163558, now seen corresponding path program 4 times [2024-06-14 11:30:21,083 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:30:21,084 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1484014947] [2024-06-14 11:30:21,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:30:21,084 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:30:21,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:30:21,218 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:30:21,218 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:30:21,219 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1484014947] [2024-06-14 11:30:21,219 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1484014947] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:30:21,219 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:30:21,219 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:30:21,219 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [15388533] [2024-06-14 11:30:21,219 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:30:21,220 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:30:21,220 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:30:21,220 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:30:21,220 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:30:21,256 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 50 [2024-06-14 11:30:21,256 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 159 places, 260 transitions, 3316 flow. Second operand has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:30:21,256 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:30:21,256 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 50 [2024-06-14 11:30:21,256 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:30:22,153 INFO L124 PetriNetUnfolderBase]: 5766/8594 cut-off events. [2024-06-14 11:30:22,153 INFO L125 PetriNetUnfolderBase]: For 213774/213792 co-relation queries the response was YES. [2024-06-14 11:30:22,203 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60487 conditions, 8594 events. 5766/8594 cut-off events. For 213774/213792 co-relation queries the response was YES. Maximal size of possible extension queue 373. Compared 49944 event pairs, 1721 based on Foata normal form. 11/8591 useless extension candidates. Maximal degree in co-relation 60406. Up to 7488 conditions per place. [2024-06-14 11:30:22,243 INFO L140 encePairwiseOnDemand]: 38/50 looper letters, 211 selfloop transitions, 114 changer transitions 0/333 dead transitions. [2024-06-14 11:30:22,243 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 165 places, 333 transitions, 4892 flow [2024-06-14 11:30:22,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:30:22,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:30:22,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 212 transitions. [2024-06-14 11:30:22,244 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6057142857142858 [2024-06-14 11:30:22,244 INFO L175 Difference]: Start difference. First operand has 159 places, 260 transitions, 3316 flow. Second operand 7 states and 212 transitions. [2024-06-14 11:30:22,244 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 165 places, 333 transitions, 4892 flow [2024-06-14 11:30:22,688 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 160 places, 333 transitions, 4782 flow, removed 5 selfloop flow, removed 5 redundant places. [2024-06-14 11:30:22,692 INFO L231 Difference]: Finished difference. Result has 164 places, 289 transitions, 4006 flow [2024-06-14 11:30:22,692 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=3218, PETRI_DIFFERENCE_MINUEND_PLACES=154, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=260, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=89, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=159, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4006, PETRI_PLACES=164, PETRI_TRANSITIONS=289} [2024-06-14 11:30:22,692 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 111 predicate places. [2024-06-14 11:30:22,692 INFO L495 AbstractCegarLoop]: Abstraction has has 164 places, 289 transitions, 4006 flow [2024-06-14 11:30:22,692 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:30:22,693 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:30:22,693 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:30:22,693 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-14 11:30:22,693 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 11:30:22,693 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:30:22,693 INFO L85 PathProgramCache]: Analyzing trace with hash 1704401538, now seen corresponding path program 5 times [2024-06-14 11:30:22,693 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:30:22,693 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1618956885] [2024-06-14 11:30:22,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:30:22,694 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:30:22,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:30:22,850 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:30:22,850 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:30:22,851 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1618956885] [2024-06-14 11:30:22,851 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1618956885] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:30:22,851 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:30:22,851 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:30:22,851 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [341250527] [2024-06-14 11:30:22,851 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:30:22,852 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:30:22,853 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:30:22,853 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:30:22,853 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:30:22,910 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 50 [2024-06-14 11:30:22,910 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 164 places, 289 transitions, 4006 flow. Second operand has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:30:22,910 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:30:22,910 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 50 [2024-06-14 11:30:22,911 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:30:23,986 INFO L124 PetriNetUnfolderBase]: 5769/8579 cut-off events. [2024-06-14 11:30:23,987 INFO L125 PetriNetUnfolderBase]: For 232940/232952 co-relation queries the response was YES. [2024-06-14 11:30:24,026 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63473 conditions, 8579 events. 5769/8579 cut-off events. For 232940/232952 co-relation queries the response was YES. Maximal size of possible extension queue 374. Compared 49880 event pairs, 1712 based on Foata normal form. 9/8575 useless extension candidates. Maximal degree in co-relation 63389. Up to 7778 conditions per place. [2024-06-14 11:30:24,063 INFO L140 encePairwiseOnDemand]: 37/50 looper letters, 261 selfloop transitions, 58 changer transitions 0/327 dead transitions. [2024-06-14 11:30:24,063 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 170 places, 327 transitions, 4934 flow [2024-06-14 11:30:24,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:30:24,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:30:24,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 204 transitions. [2024-06-14 11:30:24,064 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5828571428571429 [2024-06-14 11:30:24,064 INFO L175 Difference]: Start difference. First operand has 164 places, 289 transitions, 4006 flow. Second operand 7 states and 204 transitions. [2024-06-14 11:30:24,064 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 170 places, 327 transitions, 4934 flow [2024-06-14 11:30:24,545 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 170 places, 327 transitions, 4784 flow, removed 75 selfloop flow, removed 0 redundant places. [2024-06-14 11:30:24,549 INFO L231 Difference]: Finished difference. Result has 172 places, 297 transitions, 4160 flow [2024-06-14 11:30:24,549 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=3858, PETRI_DIFFERENCE_MINUEND_PLACES=164, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=289, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=237, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4160, PETRI_PLACES=172, PETRI_TRANSITIONS=297} [2024-06-14 11:30:24,550 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 119 predicate places. [2024-06-14 11:30:24,550 INFO L495 AbstractCegarLoop]: Abstraction has has 172 places, 297 transitions, 4160 flow [2024-06-14 11:30:24,550 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:30:24,550 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:30:24,550 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:30:24,551 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-14 11:30:24,551 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 11:30:24,551 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:30:24,551 INFO L85 PathProgramCache]: Analyzing trace with hash 1447900552, now seen corresponding path program 6 times [2024-06-14 11:30:24,551 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:30:24,551 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1052661626] [2024-06-14 11:30:24,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:30:24,552 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:30:24,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:30:24,694 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:30:24,694 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:30:24,694 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1052661626] [2024-06-14 11:30:24,694 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1052661626] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:30:24,694 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:30:24,695 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:30:24,695 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1634890631] [2024-06-14 11:30:24,695 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:30:24,695 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:30:24,695 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:30:24,696 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:30:24,696 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:30:24,746 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 50 [2024-06-14 11:30:24,747 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 172 places, 297 transitions, 4160 flow. Second operand has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:30:24,747 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:30:24,747 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 50 [2024-06-14 11:30:24,747 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:30:25,776 INFO L124 PetriNetUnfolderBase]: 5915/8796 cut-off events. [2024-06-14 11:30:25,776 INFO L125 PetriNetUnfolderBase]: For 250058/250070 co-relation queries the response was YES. [2024-06-14 11:30:25,835 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66065 conditions, 8796 events. 5915/8796 cut-off events. For 250058/250070 co-relation queries the response was YES. Maximal size of possible extension queue 387. Compared 51114 event pairs, 1727 based on Foata normal form. 9/8783 useless extension candidates. Maximal degree in co-relation 65977. Up to 7553 conditions per place. [2024-06-14 11:30:25,875 INFO L140 encePairwiseOnDemand]: 37/50 looper letters, 192 selfloop transitions, 169 changer transitions 0/369 dead transitions. [2024-06-14 11:30:25,876 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 179 places, 369 transitions, 5949 flow [2024-06-14 11:30:25,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:30:25,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:30:25,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 244 transitions. [2024-06-14 11:30:25,877 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.61 [2024-06-14 11:30:25,877 INFO L175 Difference]: Start difference. First operand has 172 places, 297 transitions, 4160 flow. Second operand 8 states and 244 transitions. [2024-06-14 11:30:25,877 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 179 places, 369 transitions, 5949 flow [2024-06-14 11:30:26,442 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 176 places, 369 transitions, 5721 flow, removed 65 selfloop flow, removed 3 redundant places. [2024-06-14 11:30:26,447 INFO L231 Difference]: Finished difference. Result has 178 places, 326 transitions, 4924 flow [2024-06-14 11:30:26,447 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=3932, PETRI_DIFFERENCE_MINUEND_PLACES=169, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=297, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=145, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=150, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4924, PETRI_PLACES=178, PETRI_TRANSITIONS=326} [2024-06-14 11:30:26,447 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 125 predicate places. [2024-06-14 11:30:26,448 INFO L495 AbstractCegarLoop]: Abstraction has has 178 places, 326 transitions, 4924 flow [2024-06-14 11:30:26,448 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:30:26,448 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:30:26,448 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:30:26,448 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-14 11:30:26,448 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 11:30:26,448 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:30:26,448 INFO L85 PathProgramCache]: Analyzing trace with hash 1709942478, now seen corresponding path program 7 times [2024-06-14 11:30:26,449 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:30:26,449 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [227192348] [2024-06-14 11:30:26,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:30:26,449 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:30:26,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:30:26,588 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:30:26,589 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:30:26,589 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [227192348] [2024-06-14 11:30:26,589 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [227192348] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:30:26,589 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:30:26,589 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:30:26,590 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1081006947] [2024-06-14 11:30:26,590 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:30:26,590 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:30:26,590 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:30:26,590 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:30:26,591 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:30:26,636 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 50 [2024-06-14 11:30:26,636 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 178 places, 326 transitions, 4924 flow. Second operand has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:30:26,636 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:30:26,636 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 50 [2024-06-14 11:30:26,636 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:30:27,856 INFO L124 PetriNetUnfolderBase]: 5926/8819 cut-off events. [2024-06-14 11:30:27,856 INFO L125 PetriNetUnfolderBase]: For 276975/276987 co-relation queries the response was YES. [2024-06-14 11:30:27,899 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69175 conditions, 8819 events. 5926/8819 cut-off events. For 276975/276987 co-relation queries the response was YES. Maximal size of possible extension queue 390. Compared 51257 event pairs, 1727 based on Foata normal form. 12/8809 useless extension candidates. Maximal degree in co-relation 69085. Up to 7569 conditions per place. [2024-06-14 11:30:27,940 INFO L140 encePairwiseOnDemand]: 37/50 looper letters, 194 selfloop transitions, 183 changer transitions 0/385 dead transitions. [2024-06-14 11:30:27,940 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 186 places, 385 transitions, 6380 flow [2024-06-14 11:30:27,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 11:30:27,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 11:30:27,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 268 transitions. [2024-06-14 11:30:27,941 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5955555555555555 [2024-06-14 11:30:27,941 INFO L175 Difference]: Start difference. First operand has 178 places, 326 transitions, 4924 flow. Second operand 9 states and 268 transitions. [2024-06-14 11:30:27,941 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 186 places, 385 transitions, 6380 flow [2024-06-14 11:30:28,484 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 184 places, 385 transitions, 6124 flow, removed 94 selfloop flow, removed 2 redundant places. [2024-06-14 11:30:28,489 INFO L231 Difference]: Finished difference. Result has 185 places, 338 transitions, 5253 flow [2024-06-14 11:30:28,490 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=4694, PETRI_DIFFERENCE_MINUEND_PLACES=176, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=326, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=171, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=155, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5253, PETRI_PLACES=185, PETRI_TRANSITIONS=338} [2024-06-14 11:30:28,490 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 132 predicate places. [2024-06-14 11:30:28,490 INFO L495 AbstractCegarLoop]: Abstraction has has 185 places, 338 transitions, 5253 flow [2024-06-14 11:30:28,490 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:30:28,490 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:30:28,491 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:30:28,491 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-14 11:30:28,491 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 11:30:28,491 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:30:28,491 INFO L85 PathProgramCache]: Analyzing trace with hash 1248598762, now seen corresponding path program 8 times [2024-06-14 11:30:28,491 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:30:28,492 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [85991721] [2024-06-14 11:30:28,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:30:28,492 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:30:28,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:30:28,627 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:30:28,628 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:30:28,628 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [85991721] [2024-06-14 11:30:28,628 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [85991721] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:30:28,628 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:30:28,628 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:30:28,629 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [913571655] [2024-06-14 11:30:28,629 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:30:28,629 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:30:28,629 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:30:28,630 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:30:28,630 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:30:28,666 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 50 [2024-06-14 11:30:28,667 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 185 places, 338 transitions, 5253 flow. Second operand has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:30:28,667 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:30:28,667 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 50 [2024-06-14 11:30:28,667 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:30:29,732 INFO L124 PetriNetUnfolderBase]: 5918/8821 cut-off events. [2024-06-14 11:30:29,732 INFO L125 PetriNetUnfolderBase]: For 272814/272826 co-relation queries the response was YES. [2024-06-14 11:30:29,784 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68379 conditions, 8821 events. 5918/8821 cut-off events. For 272814/272826 co-relation queries the response was YES. Maximal size of possible extension queue 393. Compared 51401 event pairs, 1771 based on Foata normal form. 5/8806 useless extension candidates. Maximal degree in co-relation 68287. Up to 7563 conditions per place. [2024-06-14 11:30:29,826 INFO L140 encePairwiseOnDemand]: 37/50 looper letters, 191 selfloop transitions, 168 changer transitions 0/367 dead transitions. [2024-06-14 11:30:29,826 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 190 places, 367 transitions, 6235 flow [2024-06-14 11:30:29,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 11:30:29,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 11:30:29,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 186 transitions. [2024-06-14 11:30:29,827 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.62 [2024-06-14 11:30:29,827 INFO L175 Difference]: Start difference. First operand has 185 places, 338 transitions, 5253 flow. Second operand 6 states and 186 transitions. [2024-06-14 11:30:29,827 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 190 places, 367 transitions, 6235 flow [2024-06-14 11:30:30,456 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 185 places, 367 transitions, 5778 flow, removed 88 selfloop flow, removed 5 redundant places. [2024-06-14 11:30:30,461 INFO L231 Difference]: Finished difference. Result has 186 places, 338 transitions, 5142 flow [2024-06-14 11:30:30,461 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=4796, PETRI_DIFFERENCE_MINUEND_PLACES=180, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=338, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=168, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=170, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=5142, PETRI_PLACES=186, PETRI_TRANSITIONS=338} [2024-06-14 11:30:30,461 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 133 predicate places. [2024-06-14 11:30:30,462 INFO L495 AbstractCegarLoop]: Abstraction has has 186 places, 338 transitions, 5142 flow [2024-06-14 11:30:30,462 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:30:30,462 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:30:30,462 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:30:30,462 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-14 11:30:30,462 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 11:30:30,463 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:30:30,463 INFO L85 PathProgramCache]: Analyzing trace with hash 1442194568, now seen corresponding path program 2 times [2024-06-14 11:30:30,463 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:30:30,463 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1865545757] [2024-06-14 11:30:30,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:30:30,463 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:30:30,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:30:30,617 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:30:30,617 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:30:30,617 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1865545757] [2024-06-14 11:30:30,617 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1865545757] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:30:30,617 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:30:30,618 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:30:30,618 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1459861797] [2024-06-14 11:30:30,618 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:30:30,618 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:30:30,618 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:30:30,619 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:30:30,619 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:30:30,676 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 50 [2024-06-14 11:30:30,676 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 186 places, 338 transitions, 5142 flow. Second operand has 7 states, 7 states have (on average 19.285714285714285) internal successors, (135), 7 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:30:30,676 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:30:30,676 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 50 [2024-06-14 11:30:30,676 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:30:31,849 INFO L124 PetriNetUnfolderBase]: 6034/9022 cut-off events. [2024-06-14 11:30:31,849 INFO L125 PetriNetUnfolderBase]: For 309765/309774 co-relation queries the response was YES. [2024-06-14 11:30:31,897 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69381 conditions, 9022 events. 6034/9022 cut-off events. For 309765/309774 co-relation queries the response was YES. Maximal size of possible extension queue 411. Compared 53404 event pairs, 1778 based on Foata normal form. 60/9043 useless extension candidates. Maximal degree in co-relation 69288. Up to 7544 conditions per place. [2024-06-14 11:30:31,938 INFO L140 encePairwiseOnDemand]: 40/50 looper letters, 271 selfloop transitions, 62 changer transitions 0/371 dead transitions. [2024-06-14 11:30:31,938 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 191 places, 371 transitions, 6120 flow [2024-06-14 11:30:31,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 11:30:31,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 11:30:31,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 184 transitions. [2024-06-14 11:30:31,939 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6133333333333333 [2024-06-14 11:30:31,940 INFO L175 Difference]: Start difference. First operand has 186 places, 338 transitions, 5142 flow. Second operand 6 states and 184 transitions. [2024-06-14 11:30:31,940 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 191 places, 371 transitions, 6120 flow [2024-06-14 11:30:32,549 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 186 places, 371 transitions, 5774 flow, removed 0 selfloop flow, removed 5 redundant places. [2024-06-14 11:30:32,554 INFO L231 Difference]: Finished difference. Result has 187 places, 340 transitions, 4995 flow [2024-06-14 11:30:32,554 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=4796, PETRI_DIFFERENCE_MINUEND_PLACES=181, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=338, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=276, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4995, PETRI_PLACES=187, PETRI_TRANSITIONS=340} [2024-06-14 11:30:32,555 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 134 predicate places. [2024-06-14 11:30:32,555 INFO L495 AbstractCegarLoop]: Abstraction has has 187 places, 340 transitions, 4995 flow [2024-06-14 11:30:32,555 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.285714285714285) internal successors, (135), 7 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:30:32,555 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:30:32,555 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:30:32,555 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-14 11:30:32,555 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 11:30:32,556 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:30:32,556 INFO L85 PathProgramCache]: Analyzing trace with hash 1455527048, now seen corresponding path program 3 times [2024-06-14 11:30:32,556 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:30:32,556 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [433257550] [2024-06-14 11:30:32,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:30:32,556 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:30:32,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:30:32,701 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:30:32,701 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:30:32,701 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [433257550] [2024-06-14 11:30:32,702 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [433257550] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:30:32,702 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:30:32,702 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:30:32,702 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1067273724] [2024-06-14 11:30:32,702 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:30:32,702 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:30:32,703 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:30:32,703 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:30:32,703 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:30:32,768 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 50 [2024-06-14 11:30:32,769 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 187 places, 340 transitions, 4995 flow. Second operand has 7 states, 7 states have (on average 19.285714285714285) internal successors, (135), 7 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:30:32,769 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:30:32,769 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 50 [2024-06-14 11:30:32,769 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:30:33,927 INFO L124 PetriNetUnfolderBase]: 6436/9618 cut-off events. [2024-06-14 11:30:33,927 INFO L125 PetriNetUnfolderBase]: For 341037/341046 co-relation queries the response was YES. [2024-06-14 11:30:33,988 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74030 conditions, 9618 events. 6436/9618 cut-off events. For 341037/341046 co-relation queries the response was YES. Maximal size of possible extension queue 433. Compared 57496 event pairs, 1798 based on Foata normal form. 54/9633 useless extension candidates. Maximal degree in co-relation 73936. Up to 7304 conditions per place. [2024-06-14 11:30:34,034 INFO L140 encePairwiseOnDemand]: 40/50 looper letters, 274 selfloop transitions, 69 changer transitions 0/381 dead transitions. [2024-06-14 11:30:34,034 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 192 places, 381 transitions, 6129 flow [2024-06-14 11:30:34,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 11:30:34,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 11:30:34,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 189 transitions. [2024-06-14 11:30:34,035 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.63 [2024-06-14 11:30:34,035 INFO L175 Difference]: Start difference. First operand has 187 places, 340 transitions, 4995 flow. Second operand 6 states and 189 transitions. [2024-06-14 11:30:34,035 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 192 places, 381 transitions, 6129 flow [2024-06-14 11:30:34,877 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 188 places, 381 transitions, 5978 flow, removed 17 selfloop flow, removed 4 redundant places. [2024-06-14 11:30:34,882 INFO L231 Difference]: Finished difference. Result has 189 places, 343 transitions, 5073 flow [2024-06-14 11:30:34,882 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=4844, PETRI_DIFFERENCE_MINUEND_PLACES=183, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=340, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=272, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=5073, PETRI_PLACES=189, PETRI_TRANSITIONS=343} [2024-06-14 11:30:34,882 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 136 predicate places. [2024-06-14 11:30:34,882 INFO L495 AbstractCegarLoop]: Abstraction has has 189 places, 343 transitions, 5073 flow [2024-06-14 11:30:34,883 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 19.285714285714285) internal successors, (135), 7 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:30:34,883 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:30:34,883 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:30:34,883 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-14 11:30:34,883 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 11:30:34,883 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:30:34,883 INFO L85 PathProgramCache]: Analyzing trace with hash -838869781, now seen corresponding path program 2 times [2024-06-14 11:30:34,883 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:30:34,883 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [338945096] [2024-06-14 11:30:34,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:30:34,884 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:30:34,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:30:34,999 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:30:34,999 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:30:34,999 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [338945096] [2024-06-14 11:30:34,999 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [338945096] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:30:34,999 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:30:34,999 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-14 11:30:34,999 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [65719415] [2024-06-14 11:30:34,999 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:30:35,000 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-14 11:30:35,000 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:30:35,000 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-14 11:30:35,000 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-14 11:30:35,036 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 50 [2024-06-14 11:30:35,036 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 189 places, 343 transitions, 5073 flow. Second operand has 5 states, 5 states have (on average 21.4) internal successors, (107), 5 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:30:35,036 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:30:35,036 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 50 [2024-06-14 11:30:35,037 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:30:36,265 INFO L124 PetriNetUnfolderBase]: 6187/9213 cut-off events. [2024-06-14 11:30:36,265 INFO L125 PetriNetUnfolderBase]: For 361463/361713 co-relation queries the response was YES. [2024-06-14 11:30:36,328 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73552 conditions, 9213 events. 6187/9213 cut-off events. For 361463/361713 co-relation queries the response was YES. Maximal size of possible extension queue 432. Compared 55494 event pairs, 1803 based on Foata normal form. 9/9032 useless extension candidates. Maximal degree in co-relation 73457. Up to 7936 conditions per place. [2024-06-14 11:30:36,384 INFO L140 encePairwiseOnDemand]: 41/50 looper letters, 236 selfloop transitions, 70 changer transitions 0/364 dead transitions. [2024-06-14 11:30:36,384 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 193 places, 364 transitions, 5957 flow [2024-06-14 11:30:36,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 11:30:36,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 11:30:36,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 151 transitions. [2024-06-14 11:30:36,385 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.604 [2024-06-14 11:30:36,385 INFO L175 Difference]: Start difference. First operand has 189 places, 343 transitions, 5073 flow. Second operand 5 states and 151 transitions. [2024-06-14 11:30:36,385 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 193 places, 364 transitions, 5957 flow [2024-06-14 11:30:37,185 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 191 places, 364 transitions, 5844 flow, removed 19 selfloop flow, removed 2 redundant places. [2024-06-14 11:30:37,189 INFO L231 Difference]: Finished difference. Result has 192 places, 350 transitions, 5225 flow [2024-06-14 11:30:37,190 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=4967, PETRI_DIFFERENCE_MINUEND_PLACES=187, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=343, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=280, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=5225, PETRI_PLACES=192, PETRI_TRANSITIONS=350} [2024-06-14 11:30:37,190 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 139 predicate places. [2024-06-14 11:30:37,190 INFO L495 AbstractCegarLoop]: Abstraction has has 192 places, 350 transitions, 5225 flow [2024-06-14 11:30:37,190 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 21.4) internal successors, (107), 5 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:30:37,190 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:30:37,190 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:30:37,190 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-14 11:30:37,190 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 11:30:37,191 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:30:37,191 INFO L85 PathProgramCache]: Analyzing trace with hash 440167598, now seen corresponding path program 1 times [2024-06-14 11:30:37,191 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:30:37,191 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1337116136] [2024-06-14 11:30:37,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:30:37,191 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:30:37,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:30:37,324 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:30:37,324 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:30:37,324 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1337116136] [2024-06-14 11:30:37,325 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1337116136] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:30:37,325 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:30:37,325 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:30:37,325 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2088133658] [2024-06-14 11:30:37,325 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:30:37,325 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:30:37,325 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:30:37,325 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:30:37,326 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:30:37,401 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 50 [2024-06-14 11:30:37,401 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 192 places, 350 transitions, 5225 flow. Second operand has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:30:37,401 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:30:37,401 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 50 [2024-06-14 11:30:37,402 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:30:38,872 INFO L124 PetriNetUnfolderBase]: 7497/11097 cut-off events. [2024-06-14 11:30:38,872 INFO L125 PetriNetUnfolderBase]: For 408352/408361 co-relation queries the response was YES. [2024-06-14 11:30:38,945 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85526 conditions, 11097 events. 7497/11097 cut-off events. For 408352/408361 co-relation queries the response was YES. Maximal size of possible extension queue 491. Compared 66535 event pairs, 2080 based on Foata normal form. 38/11127 useless extension candidates. Maximal degree in co-relation 85429. Up to 9091 conditions per place. [2024-06-14 11:30:38,998 INFO L140 encePairwiseOnDemand]: 39/50 looper letters, 372 selfloop transitions, 45 changer transitions 0/425 dead transitions. [2024-06-14 11:30:38,998 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 198 places, 425 transitions, 6924 flow [2024-06-14 11:30:38,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:30:38,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:30:38,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 221 transitions. [2024-06-14 11:30:38,999 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6314285714285715 [2024-06-14 11:30:38,999 INFO L175 Difference]: Start difference. First operand has 192 places, 350 transitions, 5225 flow. Second operand 7 states and 221 transitions. [2024-06-14 11:30:38,999 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 198 places, 425 transitions, 6924 flow [2024-06-14 11:30:39,892 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 194 places, 425 transitions, 6711 flow, removed 24 selfloop flow, removed 4 redundant places. [2024-06-14 11:30:39,897 INFO L231 Difference]: Finished difference. Result has 197 places, 358 transitions, 5297 flow [2024-06-14 11:30:39,897 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=5012, PETRI_DIFFERENCE_MINUEND_PLACES=188, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=350, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=307, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5297, PETRI_PLACES=197, PETRI_TRANSITIONS=358} [2024-06-14 11:30:39,898 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 144 predicate places. [2024-06-14 11:30:39,898 INFO L495 AbstractCegarLoop]: Abstraction has has 197 places, 358 transitions, 5297 flow [2024-06-14 11:30:39,898 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:30:39,898 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:30:39,898 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:30:39,899 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-14 11:30:39,899 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 11:30:39,899 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:30:39,899 INFO L85 PathProgramCache]: Analyzing trace with hash 528733358, now seen corresponding path program 2 times [2024-06-14 11:30:39,899 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:30:39,900 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [189100967] [2024-06-14 11:30:39,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:30:39,900 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:30:39,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:30:40,015 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:30:40,015 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:30:40,015 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [189100967] [2024-06-14 11:30:40,015 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [189100967] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:30:40,015 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:30:40,015 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:30:40,015 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [368518580] [2024-06-14 11:30:40,016 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:30:40,016 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:30:40,016 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:30:40,016 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:30:40,016 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:30:40,063 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 50 [2024-06-14 11:30:40,064 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 197 places, 358 transitions, 5297 flow. Second operand has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:30:40,064 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:30:40,064 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 50 [2024-06-14 11:30:40,064 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:30:41,747 INFO L124 PetriNetUnfolderBase]: 8147/12059 cut-off events. [2024-06-14 11:30:41,747 INFO L125 PetriNetUnfolderBase]: For 476692/476701 co-relation queries the response was YES. [2024-06-14 11:30:41,815 INFO L83 FinitePrefix]: Finished finitePrefix Result has 94959 conditions, 12059 events. 8147/12059 cut-off events. For 476692/476701 co-relation queries the response was YES. Maximal size of possible extension queue 542. Compared 73282 event pairs, 2356 based on Foata normal form. 38/12089 useless extension candidates. Maximal degree in co-relation 94861. Up to 10435 conditions per place. [2024-06-14 11:30:41,871 INFO L140 encePairwiseOnDemand]: 39/50 looper letters, 363 selfloop transitions, 44 changer transitions 0/415 dead transitions. [2024-06-14 11:30:41,871 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 203 places, 415 transitions, 6809 flow [2024-06-14 11:30:41,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:30:41,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:30:41,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 214 transitions. [2024-06-14 11:30:41,872 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6114285714285714 [2024-06-14 11:30:41,872 INFO L175 Difference]: Start difference. First operand has 197 places, 358 transitions, 5297 flow. Second operand 7 states and 214 transitions. [2024-06-14 11:30:41,872 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 203 places, 415 transitions, 6809 flow [2024-06-14 11:30:42,812 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 201 places, 415 transitions, 6708 flow, removed 30 selfloop flow, removed 2 redundant places. [2024-06-14 11:30:42,819 INFO L231 Difference]: Finished difference. Result has 203 places, 363 transitions, 5422 flow [2024-06-14 11:30:42,819 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=5196, PETRI_DIFFERENCE_MINUEND_PLACES=195, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=358, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=315, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5422, PETRI_PLACES=203, PETRI_TRANSITIONS=363} [2024-06-14 11:30:42,819 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 150 predicate places. [2024-06-14 11:30:42,820 INFO L495 AbstractCegarLoop]: Abstraction has has 203 places, 363 transitions, 5422 flow [2024-06-14 11:30:42,820 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:30:42,820 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:30:42,820 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:30:42,820 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-14 11:30:42,820 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 11:30:42,821 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:30:42,821 INFO L85 PathProgramCache]: Analyzing trace with hash 528881228, now seen corresponding path program 3 times [2024-06-14 11:30:42,821 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:30:42,821 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [678544436] [2024-06-14 11:30:42,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:30:42,821 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:30:42,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:30:42,968 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:30:42,969 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:30:42,969 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [678544436] [2024-06-14 11:30:42,969 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [678544436] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:30:42,969 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:30:42,969 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:30:42,970 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [770086609] [2024-06-14 11:30:42,970 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:30:42,970 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:30:42,970 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:30:42,971 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:30:42,971 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:30:43,014 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 50 [2024-06-14 11:30:43,014 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 203 places, 363 transitions, 5422 flow. Second operand has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:30:43,014 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:30:43,014 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 50 [2024-06-14 11:30:43,014 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:30:44,705 INFO L124 PetriNetUnfolderBase]: 8282/12254 cut-off events. [2024-06-14 11:30:44,705 INFO L125 PetriNetUnfolderBase]: For 498134/498143 co-relation queries the response was YES. [2024-06-14 11:30:44,789 INFO L83 FinitePrefix]: Finished finitePrefix Result has 97024 conditions, 12254 events. 8282/12254 cut-off events. For 498134/498143 co-relation queries the response was YES. Maximal size of possible extension queue 554. Compared 74680 event pairs, 2483 based on Foata normal form. 44/12290 useless extension candidates. Maximal degree in co-relation 96923. Up to 11068 conditions per place. [2024-06-14 11:30:44,850 INFO L140 encePairwiseOnDemand]: 39/50 looper letters, 355 selfloop transitions, 44 changer transitions 0/407 dead transitions. [2024-06-14 11:30:44,850 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 209 places, 407 transitions, 6632 flow [2024-06-14 11:30:44,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:30:44,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:30:44,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 208 transitions. [2024-06-14 11:30:44,851 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5942857142857143 [2024-06-14 11:30:44,851 INFO L175 Difference]: Start difference. First operand has 203 places, 363 transitions, 5422 flow. Second operand 7 states and 208 transitions. [2024-06-14 11:30:44,851 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 209 places, 407 transitions, 6632 flow [2024-06-14 11:30:46,074 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 206 places, 407 transitions, 6535 flow, removed 26 selfloop flow, removed 3 redundant places. [2024-06-14 11:30:46,079 INFO L231 Difference]: Finished difference. Result has 207 places, 365 transitions, 5494 flow [2024-06-14 11:30:46,079 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=5325, PETRI_DIFFERENCE_MINUEND_PLACES=200, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=363, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=319, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5494, PETRI_PLACES=207, PETRI_TRANSITIONS=365} [2024-06-14 11:30:46,079 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 154 predicate places. [2024-06-14 11:30:46,079 INFO L495 AbstractCegarLoop]: Abstraction has has 207 places, 365 transitions, 5494 flow [2024-06-14 11:30:46,080 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:30:46,080 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:30:46,080 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:30:46,080 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-14 11:30:46,080 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 11:30:46,080 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:30:46,080 INFO L85 PathProgramCache]: Analyzing trace with hash -1165277175, now seen corresponding path program 1 times [2024-06-14 11:30:46,081 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:30:46,081 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1271041903] [2024-06-14 11:30:46,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:30:46,081 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:30:46,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:30:46,191 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:30:46,192 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:30:46,192 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1271041903] [2024-06-14 11:30:46,192 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1271041903] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:30:46,192 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:30:46,192 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-14 11:30:46,192 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [160996296] [2024-06-14 11:30:46,192 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:30:46,192 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-14 11:30:46,192 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:30:46,193 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-14 11:30:46,193 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-14 11:30:46,227 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 50 [2024-06-14 11:30:46,227 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 207 places, 365 transitions, 5494 flow. Second operand has 5 states, 5 states have (on average 19.4) internal successors, (97), 5 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:30:46,227 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:30:46,227 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 50 [2024-06-14 11:30:46,227 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:30:47,789 INFO L124 PetriNetUnfolderBase]: 8289/12276 cut-off events. [2024-06-14 11:30:47,789 INFO L125 PetriNetUnfolderBase]: For 488652/488652 co-relation queries the response was YES. [2024-06-14 11:30:47,871 INFO L83 FinitePrefix]: Finished finitePrefix Result has 98070 conditions, 12276 events. 8289/12276 cut-off events. For 488652/488652 co-relation queries the response was YES. Maximal size of possible extension queue 554. Compared 74994 event pairs, 2498 based on Foata normal form. 1/12272 useless extension candidates. Maximal degree in co-relation 97967. Up to 11466 conditions per place. [2024-06-14 11:30:47,930 INFO L140 encePairwiseOnDemand]: 42/50 looper letters, 371 selfloop transitions, 20 changer transitions 0/399 dead transitions. [2024-06-14 11:30:47,930 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 211 places, 399 transitions, 6735 flow [2024-06-14 11:30:47,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 11:30:47,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 11:30:47,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 144 transitions. [2024-06-14 11:30:47,931 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.576 [2024-06-14 11:30:47,931 INFO L175 Difference]: Start difference. First operand has 207 places, 365 transitions, 5494 flow. Second operand 5 states and 144 transitions. [2024-06-14 11:30:47,931 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 211 places, 399 transitions, 6735 flow [2024-06-14 11:30:49,324 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 206 places, 399 transitions, 6586 flow, removed 21 selfloop flow, removed 5 redundant places. [2024-06-14 11:30:49,330 INFO L231 Difference]: Finished difference. Result has 209 places, 380 transitions, 5773 flow [2024-06-14 11:30:49,330 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=5369, PETRI_DIFFERENCE_MINUEND_PLACES=202, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=365, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=349, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=5773, PETRI_PLACES=209, PETRI_TRANSITIONS=380} [2024-06-14 11:30:49,331 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 156 predicate places. [2024-06-14 11:30:49,331 INFO L495 AbstractCegarLoop]: Abstraction has has 209 places, 380 transitions, 5773 flow [2024-06-14 11:30:49,331 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 19.4) internal successors, (97), 5 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:30:49,331 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:30:49,331 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:30:49,332 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-14 11:30:49,332 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 11:30:49,332 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:30:49,332 INFO L85 PathProgramCache]: Analyzing trace with hash 647786060, now seen corresponding path program 4 times [2024-06-14 11:30:49,332 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:30:49,333 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1904244729] [2024-06-14 11:30:49,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:30:49,333 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:30:49,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:30:49,468 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:30:49,468 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:30:49,468 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1904244729] [2024-06-14 11:30:49,469 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1904244729] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:30:49,469 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:30:49,469 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:30:49,469 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1599816629] [2024-06-14 11:30:49,469 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:30:49,469 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:30:49,470 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:30:49,470 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:30:49,470 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:30:49,506 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 50 [2024-06-14 11:30:49,506 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 209 places, 380 transitions, 5773 flow. Second operand has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:30:49,506 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:30:49,506 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 50 [2024-06-14 11:30:49,506 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:30:51,145 INFO L124 PetriNetUnfolderBase]: 8566/12660 cut-off events. [2024-06-14 11:30:51,145 INFO L125 PetriNetUnfolderBase]: For 542636/542645 co-relation queries the response was YES. [2024-06-14 11:30:51,236 INFO L83 FinitePrefix]: Finished finitePrefix Result has 100722 conditions, 12660 events. 8566/12660 cut-off events. For 542636/542645 co-relation queries the response was YES. Maximal size of possible extension queue 575. Compared 77476 event pairs, 2544 based on Foata normal form. 44/12694 useless extension candidates. Maximal degree in co-relation 100616. Up to 11504 conditions per place. [2024-06-14 11:30:51,298 INFO L140 encePairwiseOnDemand]: 39/50 looper letters, 361 selfloop transitions, 46 changer transitions 0/415 dead transitions. [2024-06-14 11:30:51,299 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 214 places, 415 transitions, 6861 flow [2024-06-14 11:30:51,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 11:30:51,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 11:30:51,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 181 transitions. [2024-06-14 11:30:51,300 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6033333333333334 [2024-06-14 11:30:51,300 INFO L175 Difference]: Start difference. First operand has 209 places, 380 transitions, 5773 flow. Second operand 6 states and 181 transitions. [2024-06-14 11:30:51,300 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 214 places, 415 transitions, 6861 flow [2024-06-14 11:30:52,499 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 214 places, 415 transitions, 6823 flow, removed 19 selfloop flow, removed 0 redundant places. [2024-06-14 11:30:52,505 INFO L231 Difference]: Finished difference. Result has 215 places, 382 transitions, 5909 flow [2024-06-14 11:30:52,505 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=5735, PETRI_DIFFERENCE_MINUEND_PLACES=209, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=380, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=334, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=5909, PETRI_PLACES=215, PETRI_TRANSITIONS=382} [2024-06-14 11:30:52,506 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 162 predicate places. [2024-06-14 11:30:52,506 INFO L495 AbstractCegarLoop]: Abstraction has has 215 places, 382 transitions, 5909 flow [2024-06-14 11:30:52,506 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:30:52,506 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:30:52,506 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:30:52,507 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-14 11:30:52,507 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 11:30:52,507 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:30:52,507 INFO L85 PathProgramCache]: Analyzing trace with hash 1248458828, now seen corresponding path program 5 times [2024-06-14 11:30:52,507 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:30:52,507 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1537606583] [2024-06-14 11:30:52,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:30:52,508 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:30:52,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:30:52,648 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:30:52,648 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:30:52,648 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1537606583] [2024-06-14 11:30:52,648 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1537606583] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:30:52,648 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:30:52,648 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:30:52,649 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [590908295] [2024-06-14 11:30:52,649 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:30:52,649 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:30:52,649 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:30:52,650 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:30:52,650 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:30:52,712 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 50 [2024-06-14 11:30:52,712 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 215 places, 382 transitions, 5909 flow. Second operand has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:30:52,712 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:30:52,712 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 50 [2024-06-14 11:30:52,712 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:30:54,609 INFO L124 PetriNetUnfolderBase]: 8799/13031 cut-off events. [2024-06-14 11:30:54,609 INFO L125 PetriNetUnfolderBase]: For 567747/567756 co-relation queries the response was YES. [2024-06-14 11:30:54,705 INFO L83 FinitePrefix]: Finished finitePrefix Result has 104350 conditions, 13031 events. 8799/13031 cut-off events. For 567747/567756 co-relation queries the response was YES. Maximal size of possible extension queue 592. Compared 80427 event pairs, 2480 based on Foata normal form. 38/13061 useless extension candidates. Maximal degree in co-relation 104241. Up to 11020 conditions per place. [2024-06-14 11:30:54,769 INFO L140 encePairwiseOnDemand]: 39/50 looper letters, 376 selfloop transitions, 49 changer transitions 0/433 dead transitions. [2024-06-14 11:30:54,770 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 220 places, 433 transitions, 7375 flow [2024-06-14 11:30:54,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 11:30:54,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 11:30:54,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 191 transitions. [2024-06-14 11:30:54,770 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6366666666666667 [2024-06-14 11:30:54,771 INFO L175 Difference]: Start difference. First operand has 215 places, 382 transitions, 5909 flow. Second operand 6 states and 191 transitions. [2024-06-14 11:30:54,771 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 220 places, 433 transitions, 7375 flow [2024-06-14 11:30:55,957 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 216 places, 433 transitions, 7240 flow, removed 24 selfloop flow, removed 4 redundant places. [2024-06-14 11:30:55,963 INFO L231 Difference]: Finished difference. Result has 218 places, 386 transitions, 6023 flow [2024-06-14 11:30:55,963 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=5774, PETRI_DIFFERENCE_MINUEND_PLACES=211, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=382, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=334, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=6023, PETRI_PLACES=218, PETRI_TRANSITIONS=386} [2024-06-14 11:30:55,963 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 165 predicate places. [2024-06-14 11:30:55,963 INFO L495 AbstractCegarLoop]: Abstraction has has 218 places, 386 transitions, 6023 flow [2024-06-14 11:30:55,963 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:30:55,963 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:30:55,964 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:30:55,964 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-14 11:30:55,964 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 11:30:55,964 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:30:55,964 INFO L85 PathProgramCache]: Analyzing trace with hash 1447908488, now seen corresponding path program 6 times [2024-06-14 11:30:55,964 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:30:55,965 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1711352295] [2024-06-14 11:30:55,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:30:55,965 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:30:55,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:30:56,116 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:30:56,117 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:30:56,117 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1711352295] [2024-06-14 11:30:56,117 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1711352295] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:30:56,117 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:30:56,117 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:30:56,117 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [3931109] [2024-06-14 11:30:56,118 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:30:56,118 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:30:56,118 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:30:56,118 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:30:56,118 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:30:56,172 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 50 [2024-06-14 11:30:56,172 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 218 places, 386 transitions, 6023 flow. Second operand has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:30:56,172 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:30:56,172 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 50 [2024-06-14 11:30:56,173 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:30:59,080 INFO L124 PetriNetUnfolderBase]: 8883/13139 cut-off events. [2024-06-14 11:30:59,080 INFO L125 PetriNetUnfolderBase]: For 592164/592173 co-relation queries the response was YES. [2024-06-14 11:30:59,178 INFO L83 FinitePrefix]: Finished finitePrefix Result has 105669 conditions, 13139 events. 8883/13139 cut-off events. For 592164/592173 co-relation queries the response was YES. Maximal size of possible extension queue 601. Compared 81177 event pairs, 2641 based on Foata normal form. 48/13177 useless extension candidates. Maximal degree in co-relation 105558. Up to 12013 conditions per place. [2024-06-14 11:30:59,243 INFO L140 encePairwiseOnDemand]: 39/50 looper letters, 371 selfloop transitions, 50 changer transitions 0/429 dead transitions. [2024-06-14 11:30:59,244 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 225 places, 429 transitions, 7172 flow [2024-06-14 11:30:59,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:30:59,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:30:59,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 231 transitions. [2024-06-14 11:30:59,245 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5775 [2024-06-14 11:30:59,245 INFO L175 Difference]: Start difference. First operand has 218 places, 386 transitions, 6023 flow. Second operand 8 states and 231 transitions. [2024-06-14 11:30:59,245 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 225 places, 429 transitions, 7172 flow [2024-06-14 11:31:00,516 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 220 places, 429 transitions, 6957 flow, removed 36 selfloop flow, removed 5 redundant places. [2024-06-14 11:31:00,522 INFO L231 Difference]: Finished difference. Result has 221 places, 388 transitions, 5999 flow [2024-06-14 11:31:00,522 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=5812, PETRI_DIFFERENCE_MINUEND_PLACES=213, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=386, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=336, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5999, PETRI_PLACES=221, PETRI_TRANSITIONS=388} [2024-06-14 11:31:00,522 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 168 predicate places. [2024-06-14 11:31:00,522 INFO L495 AbstractCegarLoop]: Abstraction has has 221 places, 388 transitions, 5999 flow [2024-06-14 11:31:00,523 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:31:00,523 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:31:00,523 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:31:00,523 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-14 11:31:00,523 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 11:31:00,524 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:31:00,524 INFO L85 PathProgramCache]: Analyzing trace with hash 1455533000, now seen corresponding path program 1 times [2024-06-14 11:31:00,524 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:31:00,524 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1894399485] [2024-06-14 11:31:00,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:31:00,524 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:31:00,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:31:00,675 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:31:00,675 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:31:00,675 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1894399485] [2024-06-14 11:31:00,675 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1894399485] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:31:00,675 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:31:00,675 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 11:31:00,676 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [596897118] [2024-06-14 11:31:00,676 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:31:00,676 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 11:31:00,676 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:31:00,677 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 11:31:00,677 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-14 11:31:00,757 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 50 [2024-06-14 11:31:00,757 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 221 places, 388 transitions, 5999 flow. Second operand has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:31:00,757 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:31:00,757 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 50 [2024-06-14 11:31:00,757 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:31:03,171 INFO L124 PetriNetUnfolderBase]: 8967/13260 cut-off events. [2024-06-14 11:31:03,172 INFO L125 PetriNetUnfolderBase]: For 592069/592078 co-relation queries the response was YES. [2024-06-14 11:31:03,254 INFO L83 FinitePrefix]: Finished finitePrefix Result has 104712 conditions, 13260 events. 8967/13260 cut-off events. For 592069/592078 co-relation queries the response was YES. Maximal size of possible extension queue 609. Compared 81889 event pairs, 2483 based on Foata normal form. 42/13292 useless extension candidates. Maximal degree in co-relation 104601. Up to 11602 conditions per place. [2024-06-14 11:31:03,312 INFO L140 encePairwiseOnDemand]: 39/50 looper letters, 372 selfloop transitions, 57 changer transitions 0/437 dead transitions. [2024-06-14 11:31:03,313 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 228 places, 437 transitions, 7214 flow [2024-06-14 11:31:03,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 11:31:03,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 11:31:03,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 235 transitions. [2024-06-14 11:31:03,314 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5875 [2024-06-14 11:31:03,314 INFO L175 Difference]: Start difference. First operand has 221 places, 388 transitions, 5999 flow. Second operand 8 states and 235 transitions. [2024-06-14 11:31:03,314 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 228 places, 437 transitions, 7214 flow [2024-06-14 11:31:04,729 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 222 places, 437 transitions, 7069 flow, removed 25 selfloop flow, removed 6 redundant places. [2024-06-14 11:31:04,735 INFO L231 Difference]: Finished difference. Result has 223 places, 390 transitions, 6051 flow [2024-06-14 11:31:04,736 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=5854, PETRI_DIFFERENCE_MINUEND_PLACES=215, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=388, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=331, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6051, PETRI_PLACES=223, PETRI_TRANSITIONS=390} [2024-06-14 11:31:04,736 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 170 predicate places. [2024-06-14 11:31:04,736 INFO L495 AbstractCegarLoop]: Abstraction has has 223 places, 390 transitions, 6051 flow [2024-06-14 11:31:04,737 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.285714285714285) internal successors, (128), 7 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:31:04,737 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:31:04,737 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:31:04,737 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-14 11:31:04,737 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 11:31:04,738 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:31:04,738 INFO L85 PathProgramCache]: Analyzing trace with hash 190261995, now seen corresponding path program 2 times [2024-06-14 11:31:04,738 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:31:04,738 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1791679349] [2024-06-14 11:31:04,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:31:04,738 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:31:04,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:31:04,839 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:31:04,839 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:31:04,839 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1791679349] [2024-06-14 11:31:04,839 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1791679349] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:31:04,840 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:31:04,840 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-14 11:31:04,840 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [978287297] [2024-06-14 11:31:04,840 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:31:04,840 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-14 11:31:04,840 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:31:04,841 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-14 11:31:04,841 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-14 11:31:04,876 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 50 [2024-06-14 11:31:04,877 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 223 places, 390 transitions, 6051 flow. Second operand has 5 states, 5 states have (on average 19.4) internal successors, (97), 5 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:31:04,877 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:31:04,877 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 50 [2024-06-14 11:31:04,877 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:31:07,078 INFO L124 PetriNetUnfolderBase]: 8963/13260 cut-off events. [2024-06-14 11:31:07,078 INFO L125 PetriNetUnfolderBase]: For 582467/582467 co-relation queries the response was YES. [2024-06-14 11:31:07,321 INFO L83 FinitePrefix]: Finished finitePrefix Result has 105272 conditions, 13260 events. 8963/13260 cut-off events. For 582467/582467 co-relation queries the response was YES. Maximal size of possible extension queue 610. Compared 81967 event pairs, 2695 based on Foata normal form. 1/13254 useless extension candidates. Maximal degree in co-relation 105160. Up to 12432 conditions per place. [2024-06-14 11:31:07,398 INFO L140 encePairwiseOnDemand]: 42/50 looper letters, 374 selfloop transitions, 20 changer transitions 0/402 dead transitions. [2024-06-14 11:31:07,398 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 227 places, 402 transitions, 6869 flow [2024-06-14 11:31:07,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 11:31:07,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 11:31:07,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 137 transitions. [2024-06-14 11:31:07,399 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.548 [2024-06-14 11:31:07,399 INFO L175 Difference]: Start difference. First operand has 223 places, 390 transitions, 6051 flow. Second operand 5 states and 137 transitions. [2024-06-14 11:31:07,399 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 227 places, 402 transitions, 6869 flow [2024-06-14 11:31:08,497 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 221 places, 402 transitions, 6696 flow, removed 31 selfloop flow, removed 6 redundant places. [2024-06-14 11:31:08,502 INFO L231 Difference]: Finished difference. Result has 222 places, 390 transitions, 5925 flow [2024-06-14 11:31:08,503 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=5878, PETRI_DIFFERENCE_MINUEND_PLACES=217, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=390, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=370, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=5925, PETRI_PLACES=222, PETRI_TRANSITIONS=390} [2024-06-14 11:31:08,503 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 169 predicate places. [2024-06-14 11:31:08,503 INFO L495 AbstractCegarLoop]: Abstraction has has 222 places, 390 transitions, 5925 flow [2024-06-14 11:31:08,503 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 19.4) internal successors, (97), 5 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:31:08,503 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:31:08,503 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:31:08,503 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-14 11:31:08,503 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 11:31:08,504 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:31:08,504 INFO L85 PathProgramCache]: Analyzing trace with hash -1154788759, now seen corresponding path program 1 times [2024-06-14 11:31:08,504 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:31:08,504 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1985265881] [2024-06-14 11:31:08,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:31:08,504 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:31:08,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:31:08,625 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:31:08,625 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:31:08,625 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1985265881] [2024-06-14 11:31:08,625 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1985265881] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:31:08,626 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:31:08,626 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-14 11:31:08,626 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [316595032] [2024-06-14 11:31:08,626 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:31:08,626 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-14 11:31:08,627 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:31:08,627 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-14 11:31:08,627 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-06-14 11:31:08,685 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 50 [2024-06-14 11:31:08,686 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 222 places, 390 transitions, 5925 flow. Second operand has 5 states, 5 states have (on average 21.4) internal successors, (107), 5 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:31:08,686 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:31:08,686 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 50 [2024-06-14 11:31:08,686 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:31:10,858 INFO L124 PetriNetUnfolderBase]: 8535/12755 cut-off events. [2024-06-14 11:31:10,858 INFO L125 PetriNetUnfolderBase]: For 600373/600381 co-relation queries the response was YES. [2024-06-14 11:31:10,955 INFO L83 FinitePrefix]: Finished finitePrefix Result has 101278 conditions, 12755 events. 8535/12755 cut-off events. For 600373/600381 co-relation queries the response was YES. Maximal size of possible extension queue 611. Compared 80401 event pairs, 2593 based on Foata normal form. 15/12618 useless extension candidates. Maximal degree in co-relation 101165. Up to 11285 conditions per place. [2024-06-14 11:31:11,233 INFO L140 encePairwiseOnDemand]: 42/50 looper letters, 323 selfloop transitions, 23 changer transitions 0/409 dead transitions. [2024-06-14 11:31:11,233 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 226 places, 409 transitions, 6743 flow [2024-06-14 11:31:11,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 11:31:11,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 11:31:11,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 149 transitions. [2024-06-14 11:31:11,236 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.596 [2024-06-14 11:31:11,236 INFO L175 Difference]: Start difference. First operand has 222 places, 390 transitions, 5925 flow. Second operand 5 states and 149 transitions. [2024-06-14 11:31:11,236 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 226 places, 409 transitions, 6743 flow [2024-06-14 11:31:12,532 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 225 places, 409 transitions, 6714 flow, removed 6 selfloop flow, removed 1 redundant places. [2024-06-14 11:31:12,537 INFO L231 Difference]: Finished difference. Result has 226 places, 393 transitions, 6020 flow [2024-06-14 11:31:12,537 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=5896, PETRI_DIFFERENCE_MINUEND_PLACES=221, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=390, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=367, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=6020, PETRI_PLACES=226, PETRI_TRANSITIONS=393} [2024-06-14 11:31:12,538 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 173 predicate places. [2024-06-14 11:31:12,538 INFO L495 AbstractCegarLoop]: Abstraction has has 226 places, 393 transitions, 6020 flow [2024-06-14 11:31:12,538 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 21.4) internal successors, (107), 5 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:31:12,538 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:31:12,538 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:31:12,539 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-14 11:31:12,539 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 11:31:12,539 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:31:12,539 INFO L85 PathProgramCache]: Analyzing trace with hash 28493204, now seen corresponding path program 1 times [2024-06-14 11:31:12,539 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:31:12,539 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1290326868] [2024-06-14 11:31:12,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:31:12,539 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:31:12,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:31:12,702 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:31:12,702 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:31:12,703 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1290326868] [2024-06-14 11:31:12,703 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1290326868] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:31:12,703 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:31:12,703 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:31:12,703 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [803485178] [2024-06-14 11:31:12,703 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:31:12,704 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:31:12,704 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:31:12,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:31:12,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:31:12,751 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 50 [2024-06-14 11:31:12,751 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 226 places, 393 transitions, 6020 flow. Second operand has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:31:12,751 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:31:12,751 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 50 [2024-06-14 11:31:12,752 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:31:15,269 INFO L124 PetriNetUnfolderBase]: 9105/13466 cut-off events. [2024-06-14 11:31:15,269 INFO L125 PetriNetUnfolderBase]: For 614833/614845 co-relation queries the response was YES. [2024-06-14 11:31:15,357 INFO L83 FinitePrefix]: Finished finitePrefix Result has 107398 conditions, 13466 events. 9105/13466 cut-off events. For 614833/614845 co-relation queries the response was YES. Maximal size of possible extension queue 621. Compared 83491 event pairs, 2682 based on Foata normal form. 9/13462 useless extension candidates. Maximal degree in co-relation 107283. Up to 12175 conditions per place. [2024-06-14 11:31:15,421 INFO L140 encePairwiseOnDemand]: 37/50 looper letters, 298 selfloop transitions, 143 changer transitions 0/449 dead transitions. [2024-06-14 11:31:15,421 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 232 places, 449 transitions, 7577 flow [2024-06-14 11:31:15,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:31:15,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:31:15,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 215 transitions. [2024-06-14 11:31:15,422 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6142857142857143 [2024-06-14 11:31:15,422 INFO L175 Difference]: Start difference. First operand has 226 places, 393 transitions, 6020 flow. Second operand 7 states and 215 transitions. [2024-06-14 11:31:15,422 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 232 places, 449 transitions, 7577 flow [2024-06-14 11:31:16,800 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 231 places, 449 transitions, 7519 flow, removed 21 selfloop flow, removed 1 redundant places. [2024-06-14 11:31:16,806 INFO L231 Difference]: Finished difference. Result has 233 places, 416 transitions, 6734 flow [2024-06-14 11:31:16,806 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=5962, PETRI_DIFFERENCE_MINUEND_PLACES=225, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=393, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=124, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=254, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6734, PETRI_PLACES=233, PETRI_TRANSITIONS=416} [2024-06-14 11:31:16,806 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 180 predicate places. [2024-06-14 11:31:16,806 INFO L495 AbstractCegarLoop]: Abstraction has has 233 places, 416 transitions, 6734 flow [2024-06-14 11:31:16,806 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:31:16,806 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:31:16,807 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:31:16,807 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-14 11:31:16,807 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 11:31:16,807 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:31:16,807 INFO L85 PathProgramCache]: Analyzing trace with hash 346918146, now seen corresponding path program 1 times [2024-06-14 11:31:16,807 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:31:16,807 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1670949547] [2024-06-14 11:31:16,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:31:16,807 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:31:16,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:31:17,112 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:31:17,113 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:31:17,113 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1670949547] [2024-06-14 11:31:17,113 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1670949547] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:31:17,113 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:31:17,113 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:31:17,113 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [254626522] [2024-06-14 11:31:17,114 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:31:17,114 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:31:17,115 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:31:17,115 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:31:17,116 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:31:17,220 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 50 [2024-06-14 11:31:17,221 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 233 places, 416 transitions, 6734 flow. Second operand has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:31:17,221 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:31:17,221 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 50 [2024-06-14 11:31:17,221 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:31:20,118 INFO L124 PetriNetUnfolderBase]: 10104/14952 cut-off events. [2024-06-14 11:31:20,118 INFO L125 PetriNetUnfolderBase]: For 795547/795559 co-relation queries the response was YES. [2024-06-14 11:31:20,223 INFO L83 FinitePrefix]: Finished finitePrefix Result has 125090 conditions, 14952 events. 10104/14952 cut-off events. For 795547/795559 co-relation queries the response was YES. Maximal size of possible extension queue 707. Compared 94133 event pairs, 2410 based on Foata normal form. 54/14993 useless extension candidates. Maximal degree in co-relation 124972. Up to 12166 conditions per place. [2024-06-14 11:31:20,307 INFO L140 encePairwiseOnDemand]: 39/50 looper letters, 412 selfloop transitions, 63 changer transitions 0/483 dead transitions. [2024-06-14 11:31:20,307 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 239 places, 483 transitions, 8612 flow [2024-06-14 11:31:20,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 11:31:20,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 11:31:20,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 225 transitions. [2024-06-14 11:31:20,308 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6428571428571429 [2024-06-14 11:31:20,308 INFO L175 Difference]: Start difference. First operand has 233 places, 416 transitions, 6734 flow. Second operand 7 states and 225 transitions. [2024-06-14 11:31:20,308 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 239 places, 483 transitions, 8612 flow [2024-06-14 11:31:22,353 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 236 places, 483 transitions, 8354 flow, removed 66 selfloop flow, removed 3 redundant places. [2024-06-14 11:31:22,361 INFO L231 Difference]: Finished difference. Result has 239 places, 427 transitions, 6911 flow [2024-06-14 11:31:22,362 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=6476, PETRI_DIFFERENCE_MINUEND_PLACES=230, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=416, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=358, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6911, PETRI_PLACES=239, PETRI_TRANSITIONS=427} [2024-06-14 11:31:22,362 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 186 predicate places. [2024-06-14 11:31:22,362 INFO L495 AbstractCegarLoop]: Abstraction has has 239 places, 427 transitions, 6911 flow [2024-06-14 11:31:22,363 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:31:22,363 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:31:22,363 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:31:22,363 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-14 11:31:22,363 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 11:31:22,364 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:31:22,364 INFO L85 PathProgramCache]: Analyzing trace with hash 413886496, now seen corresponding path program 2 times [2024-06-14 11:31:22,364 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:31:22,364 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [244395132] [2024-06-14 11:31:22,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:31:22,364 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:31:22,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:31:22,500 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:31:22,500 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:31:22,501 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [244395132] [2024-06-14 11:31:22,501 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [244395132] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:31:22,501 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:31:22,501 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:31:22,501 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1491640559] [2024-06-14 11:31:22,501 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:31:22,501 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:31:22,501 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:31:22,501 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:31:22,502 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:31:22,578 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 50 [2024-06-14 11:31:22,578 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 239 places, 427 transitions, 6911 flow. Second operand has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:31:22,578 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:31:22,579 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 50 [2024-06-14 11:31:22,579 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:31:25,304 INFO L124 PetriNetUnfolderBase]: 10292/15240 cut-off events. [2024-06-14 11:31:25,305 INFO L125 PetriNetUnfolderBase]: For 837886/837898 co-relation queries the response was YES. [2024-06-14 11:31:25,418 INFO L83 FinitePrefix]: Finished finitePrefix Result has 129366 conditions, 15240 events. 10292/15240 cut-off events. For 837886/837898 co-relation queries the response was YES. Maximal size of possible extension queue 723. Compared 96379 event pairs, 2453 based on Foata normal form. 54/15281 useless extension candidates. Maximal degree in co-relation 129244. Up to 12256 conditions per place. [2024-06-14 11:31:25,817 INFO L140 encePairwiseOnDemand]: 40/50 looper letters, 397 selfloop transitions, 67 changer transitions 0/472 dead transitions. [2024-06-14 11:31:25,817 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 244 places, 472 transitions, 8317 flow [2024-06-14 11:31:25,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 11:31:25,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 11:31:25,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 192 transitions. [2024-06-14 11:31:25,818 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.64 [2024-06-14 11:31:25,818 INFO L175 Difference]: Start difference. First operand has 239 places, 427 transitions, 6911 flow. Second operand 6 states and 192 transitions. [2024-06-14 11:31:25,818 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 244 places, 472 transitions, 8317 flow [2024-06-14 11:31:27,511 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 242 places, 472 transitions, 8153 flow, removed 56 selfloop flow, removed 2 redundant places. [2024-06-14 11:31:27,517 INFO L231 Difference]: Finished difference. Result has 244 places, 431 transitions, 7086 flow [2024-06-14 11:31:27,517 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=6749, PETRI_DIFFERENCE_MINUEND_PLACES=237, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=427, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=362, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=7086, PETRI_PLACES=244, PETRI_TRANSITIONS=431} [2024-06-14 11:31:27,517 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 191 predicate places. [2024-06-14 11:31:27,517 INFO L495 AbstractCegarLoop]: Abstraction has has 244 places, 431 transitions, 7086 flow [2024-06-14 11:31:27,518 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:31:27,518 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:31:27,518 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:31:27,518 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-14 11:31:27,518 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 11:31:27,518 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:31:27,518 INFO L85 PathProgramCache]: Analyzing trace with hash 1777911878, now seen corresponding path program 2 times [2024-06-14 11:31:27,518 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:31:27,518 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1485203758] [2024-06-14 11:31:27,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:31:27,518 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:31:27,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:31:27,665 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:31:27,666 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:31:27,666 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1485203758] [2024-06-14 11:31:27,666 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1485203758] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:31:27,666 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:31:27,666 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:31:27,666 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1825464562] [2024-06-14 11:31:27,666 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:31:27,667 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:31:27,667 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:31:27,667 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:31:27,667 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:31:27,716 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 50 [2024-06-14 11:31:27,716 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 244 places, 431 transitions, 7086 flow. Second operand has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:31:27,716 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:31:27,716 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 50 [2024-06-14 11:31:27,716 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:31:30,885 INFO L124 PetriNetUnfolderBase]: 10396/15388 cut-off events. [2024-06-14 11:31:30,885 INFO L125 PetriNetUnfolderBase]: For 830338/830350 co-relation queries the response was YES. [2024-06-14 11:31:30,992 INFO L83 FinitePrefix]: Finished finitePrefix Result has 132365 conditions, 15388 events. 10396/15388 cut-off events. For 830338/830350 co-relation queries the response was YES. Maximal size of possible extension queue 731. Compared 97669 event pairs, 3058 based on Foata normal form. 9/15384 useless extension candidates. Maximal degree in co-relation 132240. Up to 13688 conditions per place. [2024-06-14 11:31:31,068 INFO L140 encePairwiseOnDemand]: 37/50 looper letters, 296 selfloop transitions, 194 changer transitions 0/498 dead transitions. [2024-06-14 11:31:31,068 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 254 places, 498 transitions, 9042 flow [2024-06-14 11:31:31,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 11:31:31,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 11:31:31,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 315 transitions. [2024-06-14 11:31:31,069 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5727272727272728 [2024-06-14 11:31:31,069 INFO L175 Difference]: Start difference. First operand has 244 places, 431 transitions, 7086 flow. Second operand 11 states and 315 transitions. [2024-06-14 11:31:31,069 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 254 places, 498 transitions, 9042 flow [2024-06-14 11:31:33,367 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 251 places, 498 transitions, 8853 flow, removed 52 selfloop flow, removed 3 redundant places. [2024-06-14 11:31:33,374 INFO L231 Difference]: Finished difference. Result has 254 places, 446 transitions, 7709 flow [2024-06-14 11:31:33,374 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=6913, PETRI_DIFFERENCE_MINUEND_PLACES=241, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=431, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=183, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=245, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=7709, PETRI_PLACES=254, PETRI_TRANSITIONS=446} [2024-06-14 11:31:33,374 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 201 predicate places. [2024-06-14 11:31:33,374 INFO L495 AbstractCegarLoop]: Abstraction has has 254 places, 446 transitions, 7709 flow [2024-06-14 11:31:33,375 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:31:33,375 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:31:33,375 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:31:33,375 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-14 11:31:33,375 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 11:31:33,376 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:31:33,376 INFO L85 PathProgramCache]: Analyzing trace with hash 1870058964, now seen corresponding path program 3 times [2024-06-14 11:31:33,376 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:31:33,376 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [736281317] [2024-06-14 11:31:33,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:31:33,376 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:31:33,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:31:33,492 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:31:33,492 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:31:33,492 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [736281317] [2024-06-14 11:31:33,493 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [736281317] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:31:33,493 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:31:33,493 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:31:33,493 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [765734463] [2024-06-14 11:31:33,493 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:31:33,493 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:31:33,493 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:31:33,494 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:31:33,494 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:31:33,538 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 50 [2024-06-14 11:31:33,538 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 254 places, 446 transitions, 7709 flow. Second operand has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:31:33,538 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:31:33,538 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 50 [2024-06-14 11:31:33,539 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:31:36,721 INFO L124 PetriNetUnfolderBase]: 10478/15515 cut-off events. [2024-06-14 11:31:36,721 INFO L125 PetriNetUnfolderBase]: For 846473/846485 co-relation queries the response was YES. [2024-06-14 11:31:36,840 INFO L83 FinitePrefix]: Finished finitePrefix Result has 135433 conditions, 15515 events. 10478/15515 cut-off events. For 846473/846485 co-relation queries the response was YES. Maximal size of possible extension queue 740. Compared 98629 event pairs, 3082 based on Foata normal form. 9/15511 useless extension candidates. Maximal degree in co-relation 135305. Up to 13769 conditions per place. [2024-06-14 11:31:36,935 INFO L140 encePairwiseOnDemand]: 37/50 looper letters, 286 selfloop transitions, 213 changer transitions 0/507 dead transitions. [2024-06-14 11:31:36,935 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 263 places, 507 transitions, 9823 flow [2024-06-14 11:31:36,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 11:31:36,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 11:31:36,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 292 transitions. [2024-06-14 11:31:36,936 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.584 [2024-06-14 11:31:36,936 INFO L175 Difference]: Start difference. First operand has 254 places, 446 transitions, 7709 flow. Second operand 10 states and 292 transitions. [2024-06-14 11:31:36,936 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 263 places, 507 transitions, 9823 flow [2024-06-14 11:31:39,195 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 257 places, 507 transitions, 9227 flow, removed 186 selfloop flow, removed 6 redundant places. [2024-06-14 11:31:39,201 INFO L231 Difference]: Finished difference. Result has 260 places, 461 transitions, 8077 flow [2024-06-14 11:31:39,201 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=7221, PETRI_DIFFERENCE_MINUEND_PLACES=248, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=446, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=198, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=246, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=8077, PETRI_PLACES=260, PETRI_TRANSITIONS=461} [2024-06-14 11:31:39,202 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 207 predicate places. [2024-06-14 11:31:39,202 INFO L495 AbstractCegarLoop]: Abstraction has has 260 places, 461 transitions, 8077 flow [2024-06-14 11:31:39,202 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:31:39,202 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 11:31:39,202 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 11:31:39,203 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-14 11:31:39,203 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 11:31:39,203 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 11:31:39,203 INFO L85 PathProgramCache]: Analyzing trace with hash 1778200178, now seen corresponding path program 4 times [2024-06-14 11:31:39,204 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 11:31:39,204 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [996509885] [2024-06-14 11:31:39,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 11:31:39,204 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 11:31:39,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 11:31:39,529 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 11:31:39,529 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 11:31:39,529 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [996509885] [2024-06-14 11:31:39,529 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [996509885] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 11:31:39,529 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 11:31:39,529 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 11:31:39,529 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1287641593] [2024-06-14 11:31:39,529 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 11:31:39,529 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 11:31:39,530 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 11:31:39,530 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 11:31:39,531 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-14 11:31:39,576 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 50 [2024-06-14 11:31:39,577 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 260 places, 461 transitions, 8077 flow. Second operand has 8 states, 8 states have (on average 18.125) internal successors, (145), 8 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 11:31:39,577 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 11:31:39,577 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 50 [2024-06-14 11:31:39,577 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 11:31:42,684 INFO L124 PetriNetUnfolderBase]: 10470/15505 cut-off events. [2024-06-14 11:31:42,684 INFO L125 PetriNetUnfolderBase]: For 860966/860978 co-relation queries the response was YES. [2024-06-14 11:31:42,796 INFO L83 FinitePrefix]: Finished finitePrefix Result has 133529 conditions, 15505 events. 10470/15505 cut-off events. For 860966/860978 co-relation queries the response was YES. Maximal size of possible extension queue 739. Compared 98603 event pairs, 3082 based on Foata normal form. 9/15501 useless extension candidates. Maximal degree in co-relation 133398. Up to 13763 conditions per place. [2024-06-14 11:31:42,871 INFO L140 encePairwiseOnDemand]: 37/50 looper letters, 299 selfloop transitions, 206 changer transitions 0/513 dead transitions. [2024-06-14 11:31:42,871 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 270 places, 513 transitions, 9719 flow [2024-06-14 11:31:42,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 11:31:42,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 11:31:42,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 318 transitions. [2024-06-14 11:31:42,872 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5781818181818181 [2024-06-14 11:31:42,872 INFO L175 Difference]: Start difference. First operand has 260 places, 461 transitions, 8077 flow. Second operand 11 states and 318 transitions. [2024-06-14 11:31:42,872 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 270 places, 513 transitions, 9719 flow