./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/safe007_pso.oepc_pso.opt_tso.oepc_tso.opt-thin001_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/safe007_pso.oepc_pso.opt_tso.oepc_tso.opt-thin001_pso.oepc_pso.opt_tso.oepc_tso.opt.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version bcb38a6f 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/safe007_pso.oepc_pso.opt_tso.oepc_tso.opt-thin001_pso.oepc_pso.opt_tso.oepc_tso.opt.i ./goblint.2024-05-21_14-57-05.files/protection/safe007_pso.oepc_pso.opt_tso.oepc_tso.opt-thin001_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-bcb38a6-m [2024-06-03 18:37:03,771 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-03 18:37:03,806 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-03 18:37:03,809 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-03 18:37:03,809 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-03 18:37:03,823 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-03 18:37:03,824 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-03 18:37:03,824 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-03 18:37:03,825 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-03 18:37:03,825 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-03 18:37:03,825 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-03 18:37:03,825 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-03 18:37:03,826 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-03 18:37:03,826 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-03 18:37:03,826 INFO L153 SettingsManager]: * Use SBE=true [2024-06-03 18:37:03,827 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-03 18:37:03,827 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-03 18:37:03,827 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-03 18:37:03,827 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-03 18:37:03,828 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-03 18:37:03,828 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-03 18:37:03,829 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-03 18:37:03,829 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-03 18:37:03,829 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-03 18:37:03,829 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-03 18:37:03,830 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-03 18:37:03,830 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-03 18:37:03,830 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-03 18:37:03,830 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-03 18:37:03,830 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-03 18:37:03,831 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-03 18:37:03,831 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-03 18:37:03,831 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-03 18:37:03,831 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-03 18:37:03,832 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-03 18:37:03,832 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-03 18:37:03,832 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-03 18:37:03,832 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-03 18:37:03,833 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-03 18:37:03,833 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-03 18:37:03,833 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-03 18:37:03,835 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-03 18:37:03,835 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-03 18:37:03,835 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-03 18:37:04,052 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-03 18:37:04,075 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-03 18:37:04,077 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-03 18:37:04,078 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-03 18:37:04,078 INFO L274 PluginConnector]: CDTParser initialized [2024-06-03 18:37:04,079 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/safe007_pso.oepc_pso.opt_tso.oepc_tso.opt-thin001_pso.oepc_pso.opt_tso.oepc_tso.opt.i [2024-06-03 18:37:05,085 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-03 18:37:05,287 INFO L384 CDTParser]: Found 1 translation units. [2024-06-03 18:37:05,287 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe007_pso.oepc_pso.opt_tso.oepc_tso.opt-thin001_pso.oepc_pso.opt_tso.oepc_tso.opt.i [2024-06-03 18:37:05,307 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b17c89dac/27eb6d212b724515a49f360b337f8401/FLAG9ffcde44e [2024-06-03 18:37:05,317 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b17c89dac/27eb6d212b724515a49f360b337f8401 [2024-06-03 18:37:05,319 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-03 18:37:05,320 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-03 18:37:05,321 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-05-21_14-57-05.files/protection/safe007_pso.oepc_pso.opt_tso.oepc_tso.opt-thin001_pso.oepc_pso.opt_tso.oepc_tso.opt.yml/witness.yml [2024-06-03 18:37:05,455 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-03 18:37:05,456 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-03 18:37:05,457 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-03 18:37:05,458 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-03 18:37:05,475 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-03 18:37:05,475 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.06 06:37:05" (1/2) ... [2024-06-03 18:37:05,476 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@48a16f45 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 06:37:05, skipping insertion in model container [2024-06-03 18:37:05,477 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.06 06:37:05" (1/2) ... [2024-06-03 18:37:05,478 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@58f788d5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 06:37:05, skipping insertion in model container [2024-06-03 18:37:05,478 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 03.06 06:37:05" (2/2) ... [2024-06-03 18:37:05,478 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@48a16f45 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 06:37:05, skipping insertion in model container [2024-06-03 18:37:05,479 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 03.06 06:37:05" (2/2) ... [2024-06-03 18:37:05,479 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-03 18:37:05,518 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-03 18:37:05,520 INFO L97 edCorrectnessWitness]: Location invariant before [L785-L785] ((((((! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1))) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1)))) && (! multithreaded || ((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 1) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || ((0 <= z && z <= 1) && (z == 0 || z == 1)))) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || ((0 <= __unbuffered_p1_EAX && __unbuffered_p1_EAX <= 1) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1))) [2024-06-03 18:37:05,520 INFO L97 edCorrectnessWitness]: Location invariant before [L786-L786] ((((((! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1))) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1)))) && (! multithreaded || ((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 1) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || ((0 <= z && z <= 1) && (z == 0 || z == 1)))) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || ((0 <= __unbuffered_p1_EAX && __unbuffered_p1_EAX <= 1) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1))) [2024-06-03 18:37:05,520 INFO L97 edCorrectnessWitness]: Location invariant before [L783-L783] ((((((! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1))) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1)))) && (! multithreaded || ((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 1) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || ((0 <= z && z <= 1) && (z == 0 || z == 1)))) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || ((0 <= __unbuffered_p1_EAX && __unbuffered_p1_EAX <= 1) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1))) [2024-06-03 18:37:05,520 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-03 18:37:05,520 INFO L106 edCorrectnessWitness]: ghost_update [L781-L781] multithreaded = 1; [2024-06-03 18:37:05,556 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-03 18:37:05,803 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-03 18:37:05,812 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-03 18:37:05,876 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-03 18:37:05,909 INFO L206 MainTranslator]: Completed translation [2024-06-03 18:37:05,910 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 06:37:05 WrapperNode [2024-06-03 18:37:05,910 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-03 18:37:05,912 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-03 18:37:05,912 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-03 18:37:05,913 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-03 18:37:05,918 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 03.06 06:37:05" (1/1) ... [2024-06-03 18:37:05,944 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 03.06 06:37:05" (1/1) ... [2024-06-03 18:37:05,971 INFO L138 Inliner]: procedures = 175, calls = 42, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 67 [2024-06-03 18:37:05,972 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-03 18:37:05,973 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-03 18:37:05,973 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-03 18:37:05,973 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-03 18:37:05,982 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 06:37:05" (1/1) ... [2024-06-03 18:37:05,982 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 06:37:05" (1/1) ... [2024-06-03 18:37:05,986 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 06:37:05" (1/1) ... [2024-06-03 18:37:06,006 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]. [2024-06-03 18:37:06,006 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 06:37:05" (1/1) ... [2024-06-03 18:37:06,007 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 06:37:05" (1/1) ... [2024-06-03 18:37:06,024 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 06:37:05" (1/1) ... [2024-06-03 18:37:06,026 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 06:37:05" (1/1) ... [2024-06-03 18:37:06,027 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 06:37:05" (1/1) ... [2024-06-03 18:37:06,030 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 06:37:05" (1/1) ... [2024-06-03 18:37:06,033 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-03 18:37:06,036 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-03 18:37:06,037 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-03 18:37:06,037 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-03 18:37:06,038 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 06:37:05" (1/1) ... [2024-06-03 18:37:06,042 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-03 18:37:06,047 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-03 18:37:06,060 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) [2024-06-03 18:37:06,074 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 [2024-06-03 18:37:06,093 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-03 18:37:06,093 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-03 18:37:06,093 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-03 18:37:06,093 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-03 18:37:06,094 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-03 18:37:06,094 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-03 18:37:06,094 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-03 18:37:06,094 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-03 18:37:06,094 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-03 18:37:06,094 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-03 18:37:06,094 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-03 18:37:06,095 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-03 18:37:06,096 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-03 18:37:06,192 INFO L244 CfgBuilder]: Building ICFG [2024-06-03 18:37:06,193 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-03 18:37:06,347 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-03 18:37:06,347 INFO L293 CfgBuilder]: Performing block encoding [2024-06-03 18:37:06,402 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-03 18:37:06,402 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-03 18:37:06,403 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.06 06:37:06 BoogieIcfgContainer [2024-06-03 18:37:06,403 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-03 18:37:06,404 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-03 18:37:06,404 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-03 18:37:06,407 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-03 18:37:06,407 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.06 06:37:05" (1/4) ... [2024-06-03 18:37:06,408 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6b4c2a2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.06 06:37:06, skipping insertion in model container [2024-06-03 18:37:06,408 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 03.06 06:37:05" (2/4) ... [2024-06-03 18:37:06,408 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6b4c2a2 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 03.06 06:37:06, skipping insertion in model container [2024-06-03 18:37:06,408 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 06:37:05" (3/4) ... [2024-06-03 18:37:06,409 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6b4c2a2 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 03.06 06:37:06, skipping insertion in model container [2024-06-03 18:37:06,409 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.06 06:37:06" (4/4) ... [2024-06-03 18:37:06,410 INFO L112 eAbstractionObserver]: Analyzing ICFG safe007_pso.oepc_pso.opt_tso.oepc_tso.opt-thin001_pso.oepc_pso.opt_tso.oepc_tso.opt.i [2024-06-03 18:37:06,423 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-03 18:37:06,423 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2024-06-03 18:37:06,423 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-03 18:37:06,458 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-03 18:37:06,485 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 51 places, 41 transitions, 94 flow [2024-06-03 18:37:06,517 INFO L124 PetriNetUnfolderBase]: 0/38 cut-off events. [2024-06-03 18:37:06,518 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-03 18:37:06,520 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48 conditions, 38 events. 0/38 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 61 event pairs, 0 based on Foata normal form. 0/35 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2024-06-03 18:37:06,520 INFO L82 GeneralOperation]: Start removeDead. Operand has 51 places, 41 transitions, 94 flow [2024-06-03 18:37:06,524 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 42 places, 32 transitions, 73 flow [2024-06-03 18:37:06,538 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-03 18:37:06,544 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;@5940612d, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-03 18:37:06,545 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2024-06-03 18:37:06,551 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-03 18:37:06,551 INFO L124 PetriNetUnfolderBase]: 0/6 cut-off events. [2024-06-03 18:37:06,551 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-03 18:37:06,551 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:37:06,552 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-06-03 18:37:06,552 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 18:37:06,556 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:37:06,556 INFO L85 PathProgramCache]: Analyzing trace with hash -1786995326, now seen corresponding path program 1 times [2024-06-03 18:37:06,564 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:37:06,564 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2016799261] [2024-06-03 18:37:06,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:37:06,565 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:37:06,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:37:07,008 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:37:07,009 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:37:07,009 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2016799261] [2024-06-03 18:37:07,009 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2016799261] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:37:07,009 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:37:07,010 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-03 18:37:07,011 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1497729845] [2024-06-03 18:37:07,011 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:37:07,017 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-03 18:37:07,022 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:37:07,042 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-03 18:37:07,042 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-03 18:37:07,068 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 41 [2024-06-03 18:37:07,070 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 32 transitions, 73 flow. Second operand has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:37:07,070 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:37:07,070 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 41 [2024-06-03 18:37:07,071 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:37:07,242 INFO L124 PetriNetUnfolderBase]: 471/808 cut-off events. [2024-06-03 18:37:07,243 INFO L125 PetriNetUnfolderBase]: For 18/18 co-relation queries the response was YES. [2024-06-03 18:37:07,250 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1598 conditions, 808 events. 471/808 cut-off events. For 18/18 co-relation queries the response was YES. Maximal size of possible extension queue 54. Compared 3897 event pairs, 288 based on Foata normal form. 1/788 useless extension candidates. Maximal degree in co-relation 1583. Up to 733 conditions per place. [2024-06-03 18:37:07,255 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 29 selfloop transitions, 4 changer transitions 0/42 dead transitions. [2024-06-03 18:37:07,255 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 42 transitions, 165 flow [2024-06-03 18:37:07,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-03 18:37:07,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-03 18:37:07,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 84 transitions. [2024-06-03 18:37:07,265 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6829268292682927 [2024-06-03 18:37:07,266 INFO L175 Difference]: Start difference. First operand has 42 places, 32 transitions, 73 flow. Second operand 3 states and 84 transitions. [2024-06-03 18:37:07,267 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 42 transitions, 165 flow [2024-06-03 18:37:07,269 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 42 transitions, 160 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-03 18:37:07,273 INFO L231 Difference]: Finished difference. Result has 42 places, 35 transitions, 100 flow [2024-06-03 18:37:07,274 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=70, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=100, PETRI_PLACES=42, PETRI_TRANSITIONS=35} [2024-06-03 18:37:07,277 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 0 predicate places. [2024-06-03 18:37:07,277 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 35 transitions, 100 flow [2024-06-03 18:37:07,277 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:37:07,278 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:37:07,278 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:37:07,278 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-03 18:37:07,278 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 18:37:07,279 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:37:07,279 INFO L85 PathProgramCache]: Analyzing trace with hash -257083245, now seen corresponding path program 1 times [2024-06-03 18:37:07,279 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:37:07,279 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [291416421] [2024-06-03 18:37:07,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:37:07,280 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:37:07,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:37:07,533 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:37:07,533 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:37:07,533 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [291416421] [2024-06-03 18:37:07,534 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [291416421] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:37:07,534 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:37:07,534 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-03 18:37:07,534 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1764530407] [2024-06-03 18:37:07,534 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:37:07,536 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-03 18:37:07,536 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:37:07,537 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-03 18:37:07,537 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-03 18:37:07,569 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-03 18:37:07,570 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 35 transitions, 100 flow. Second operand has 5 states, 5 states have (on average 15.6) internal successors, (78), 5 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) [2024-06-03 18:37:07,571 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:37:07,571 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-03 18:37:07,571 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:37:07,732 INFO L124 PetriNetUnfolderBase]: 754/1257 cut-off events. [2024-06-03 18:37:07,733 INFO L125 PetriNetUnfolderBase]: For 195/205 co-relation queries the response was YES. [2024-06-03 18:37:07,735 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2861 conditions, 1257 events. 754/1257 cut-off events. For 195/205 co-relation queries the response was YES. Maximal size of possible extension queue 75. Compared 6122 event pairs, 318 based on Foata normal form. 6/1260 useless extension candidates. Maximal degree in co-relation 2846. Up to 1124 conditions per place. [2024-06-03 18:37:07,739 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 42 selfloop transitions, 7 changer transitions 0/56 dead transitions. [2024-06-03 18:37:07,740 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 56 transitions, 256 flow [2024-06-03 18:37:07,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-03 18:37:07,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-03 18:37:07,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 105 transitions. [2024-06-03 18:37:07,742 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6402439024390244 [2024-06-03 18:37:07,742 INFO L175 Difference]: Start difference. First operand has 42 places, 35 transitions, 100 flow. Second operand 4 states and 105 transitions. [2024-06-03 18:37:07,743 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 56 transitions, 256 flow [2024-06-03 18:37:07,743 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 56 transitions, 250 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-03 18:37:07,744 INFO L231 Difference]: Finished difference. Result has 46 places, 41 transitions, 152 flow [2024-06-03 18:37:07,744 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=96, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=152, PETRI_PLACES=46, PETRI_TRANSITIONS=41} [2024-06-03 18:37:07,745 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 4 predicate places. [2024-06-03 18:37:07,745 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 41 transitions, 152 flow [2024-06-03 18:37:07,745 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.6) internal successors, (78), 5 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) [2024-06-03 18:37:07,745 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:37:07,745 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:37:07,745 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-03 18:37:07,745 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 18:37:07,746 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:37:07,746 INFO L85 PathProgramCache]: Analyzing trace with hash 995354032, now seen corresponding path program 1 times [2024-06-03 18:37:07,746 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:37:07,746 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1231235398] [2024-06-03 18:37:07,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:37:07,746 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:37:07,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:37:07,940 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:37:07,941 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:37:07,941 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1231235398] [2024-06-03 18:37:07,941 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1231235398] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:37:07,941 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:37:07,941 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-03 18:37:07,942 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [190667322] [2024-06-03 18:37:07,942 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:37:07,942 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-03 18:37:07,943 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:37:07,943 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-03 18:37:07,944 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-03 18:37:07,996 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-03 18:37:07,997 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 41 transitions, 152 flow. Second operand has 6 states, 6 states have (on average 15.5) internal successors, (93), 6 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:37:07,998 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:37:07,998 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-03 18:37:07,998 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:37:08,164 INFO L124 PetriNetUnfolderBase]: 745/1242 cut-off events. [2024-06-03 18:37:08,165 INFO L125 PetriNetUnfolderBase]: For 591/633 co-relation queries the response was YES. [2024-06-03 18:37:08,167 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3175 conditions, 1242 events. 745/1242 cut-off events. For 591/633 co-relation queries the response was YES. Maximal size of possible extension queue 74. Compared 6050 event pairs, 218 based on Foata normal form. 19/1258 useless extension candidates. Maximal degree in co-relation 3157. Up to 1079 conditions per place. [2024-06-03 18:37:08,171 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 46 selfloop transitions, 9 changer transitions 0/62 dead transitions. [2024-06-03 18:37:08,171 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 62 transitions, 316 flow [2024-06-03 18:37:08,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-03 18:37:08,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-03 18:37:08,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 125 transitions. [2024-06-03 18:37:08,175 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6097560975609756 [2024-06-03 18:37:08,176 INFO L175 Difference]: Start difference. First operand has 46 places, 41 transitions, 152 flow. Second operand 5 states and 125 transitions. [2024-06-03 18:37:08,176 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 62 transitions, 316 flow [2024-06-03 18:37:08,178 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 62 transitions, 314 flow, removed 1 selfloop flow, removed 0 redundant places. [2024-06-03 18:37:08,179 INFO L231 Difference]: Finished difference. Result has 50 places, 42 transitions, 183 flow [2024-06-03 18:37:08,179 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=144, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=183, PETRI_PLACES=50, PETRI_TRANSITIONS=42} [2024-06-03 18:37:08,180 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 8 predicate places. [2024-06-03 18:37:08,180 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 42 transitions, 183 flow [2024-06-03 18:37:08,180 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.5) internal successors, (93), 6 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:37:08,180 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:37:08,181 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:37:08,181 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-03 18:37:08,181 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 18:37:08,181 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:37:08,181 INFO L85 PathProgramCache]: Analyzing trace with hash 1465943599, now seen corresponding path program 1 times [2024-06-03 18:37:08,182 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:37:08,182 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [385014552] [2024-06-03 18:37:08,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:37:08,182 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:37:08,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:37:08,356 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:37:08,357 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:37:08,357 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [385014552] [2024-06-03 18:37:08,357 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [385014552] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:37:08,357 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:37:08,357 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-03 18:37:08,357 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1548000872] [2024-06-03 18:37:08,358 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:37:08,358 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-03 18:37:08,358 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:37:08,359 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-03 18:37:08,359 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-03 18:37:08,389 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-03 18:37:08,389 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 42 transitions, 183 flow. Second operand has 5 states, 5 states have (on average 16.2) internal successors, (81), 5 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:37:08,389 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:37:08,390 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-03 18:37:08,390 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:37:08,504 INFO L124 PetriNetUnfolderBase]: 697/1163 cut-off events. [2024-06-03 18:37:08,504 INFO L125 PetriNetUnfolderBase]: For 1029/1029 co-relation queries the response was YES. [2024-06-03 18:37:08,507 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3248 conditions, 1163 events. 697/1163 cut-off events. For 1029/1029 co-relation queries the response was YES. Maximal size of possible extension queue 71. Compared 5805 event pairs, 308 based on Foata normal form. 2/1164 useless extension candidates. Maximal degree in co-relation 3227. Up to 1047 conditions per place. [2024-06-03 18:37:08,511 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 46 selfloop transitions, 8 changer transitions 0/61 dead transitions. [2024-06-03 18:37:08,512 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 61 transitions, 356 flow [2024-06-03 18:37:08,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-03 18:37:08,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-03 18:37:08,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 100 transitions. [2024-06-03 18:37:08,514 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6097560975609756 [2024-06-03 18:37:08,514 INFO L175 Difference]: Start difference. First operand has 50 places, 42 transitions, 183 flow. Second operand 4 states and 100 transitions. [2024-06-03 18:37:08,514 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 61 transitions, 356 flow [2024-06-03 18:37:08,518 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 61 transitions, 331 flow, removed 3 selfloop flow, removed 3 redundant places. [2024-06-03 18:37:08,519 INFO L231 Difference]: Finished difference. Result has 52 places, 49 transitions, 231 flow [2024-06-03 18:37:08,520 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=162, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=231, PETRI_PLACES=52, PETRI_TRANSITIONS=49} [2024-06-03 18:37:08,521 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 10 predicate places. [2024-06-03 18:37:08,521 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 49 transitions, 231 flow [2024-06-03 18:37:08,521 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.2) internal successors, (81), 5 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:37:08,521 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:37:08,521 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:37:08,522 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-03 18:37:08,522 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 18:37:08,522 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:37:08,522 INFO L85 PathProgramCache]: Analyzing trace with hash 609729492, now seen corresponding path program 1 times [2024-06-03 18:37:08,523 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:37:08,523 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1189688715] [2024-06-03 18:37:08,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:37:08,523 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:37:08,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:37:08,711 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:37:08,711 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:37:08,711 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1189688715] [2024-06-03 18:37:08,712 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1189688715] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:37:08,712 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:37:08,712 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-03 18:37:08,713 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [680605507] [2024-06-03 18:37:08,713 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:37:08,713 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-03 18:37:08,713 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:37:08,714 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-03 18:37:08,714 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-03 18:37:08,750 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-03 18:37:08,751 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 49 transitions, 231 flow. Second operand has 6 states, 6 states have (on average 16.0) internal successors, (96), 6 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) [2024-06-03 18:37:08,751 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:37:08,751 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-03 18:37:08,752 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:37:08,893 INFO L124 PetriNetUnfolderBase]: 826/1388 cut-off events. [2024-06-03 18:37:08,894 INFO L125 PetriNetUnfolderBase]: For 1903/1945 co-relation queries the response was YES. [2024-06-03 18:37:08,897 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4182 conditions, 1388 events. 826/1388 cut-off events. For 1903/1945 co-relation queries the response was YES. Maximal size of possible extension queue 80. Compared 6978 event pairs, 293 based on Foata normal form. 16/1385 useless extension candidates. Maximal degree in co-relation 4159. Up to 1177 conditions per place. [2024-06-03 18:37:08,902 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 49 selfloop transitions, 18 changer transitions 0/76 dead transitions. [2024-06-03 18:37:08,902 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 76 transitions, 465 flow [2024-06-03 18:37:08,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-03 18:37:08,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-03 18:37:08,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 128 transitions. [2024-06-03 18:37:08,904 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.624390243902439 [2024-06-03 18:37:08,904 INFO L175 Difference]: Start difference. First operand has 52 places, 49 transitions, 231 flow. Second operand 5 states and 128 transitions. [2024-06-03 18:37:08,904 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 76 transitions, 465 flow [2024-06-03 18:37:08,907 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 76 transitions, 463 flow, removed 1 selfloop flow, removed 0 redundant places. [2024-06-03 18:37:08,910 INFO L231 Difference]: Finished difference. Result has 57 places, 55 transitions, 311 flow [2024-06-03 18:37:08,910 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=229, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=311, PETRI_PLACES=57, PETRI_TRANSITIONS=55} [2024-06-03 18:37:08,912 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 15 predicate places. [2024-06-03 18:37:08,912 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 55 transitions, 311 flow [2024-06-03 18:37:08,912 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.0) internal successors, (96), 6 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) [2024-06-03 18:37:08,916 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:37:08,916 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:37:08,916 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-03 18:37:08,916 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 18:37:08,917 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:37:08,917 INFO L85 PathProgramCache]: Analyzing trace with hash 631097172, now seen corresponding path program 2 times [2024-06-03 18:37:08,917 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:37:08,917 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2086125329] [2024-06-03 18:37:08,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:37:08,918 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:37:08,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:37:09,074 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:37:09,075 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:37:09,075 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2086125329] [2024-06-03 18:37:09,075 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2086125329] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:37:09,075 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:37:09,075 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-03 18:37:09,076 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [164904334] [2024-06-03 18:37:09,076 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:37:09,076 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-03 18:37:09,076 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:37:09,077 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-03 18:37:09,077 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-03 18:37:09,107 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-03 18:37:09,107 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 55 transitions, 311 flow. Second operand has 6 states, 6 states have (on average 16.0) internal successors, (96), 6 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) [2024-06-03 18:37:09,107 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:37:09,107 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-03 18:37:09,107 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:37:09,265 INFO L124 PetriNetUnfolderBase]: 821/1381 cut-off events. [2024-06-03 18:37:09,265 INFO L125 PetriNetUnfolderBase]: For 3010/3058 co-relation queries the response was YES. [2024-06-03 18:37:09,267 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4573 conditions, 1381 events. 821/1381 cut-off events. For 3010/3058 co-relation queries the response was YES. Maximal size of possible extension queue 80. Compared 6942 event pairs, 293 based on Foata normal form. 18/1381 useless extension candidates. Maximal degree in co-relation 4547. Up to 1181 conditions per place. [2024-06-03 18:37:09,274 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 46 selfloop transitions, 15 changer transitions 0/70 dead transitions. [2024-06-03 18:37:09,275 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 70 transitions, 471 flow [2024-06-03 18:37:09,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-03 18:37:09,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-03 18:37:09,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 105 transitions. [2024-06-03 18:37:09,276 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6402439024390244 [2024-06-03 18:37:09,276 INFO L175 Difference]: Start difference. First operand has 57 places, 55 transitions, 311 flow. Second operand 4 states and 105 transitions. [2024-06-03 18:37:09,276 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 70 transitions, 471 flow [2024-06-03 18:37:09,280 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 70 transitions, 446 flow, removed 8 selfloop flow, removed 1 redundant places. [2024-06-03 18:37:09,282 INFO L231 Difference]: Finished difference. Result has 60 places, 55 transitions, 330 flow [2024-06-03 18:37:09,282 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=286, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=330, PETRI_PLACES=60, PETRI_TRANSITIONS=55} [2024-06-03 18:37:09,284 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 18 predicate places. [2024-06-03 18:37:09,284 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 55 transitions, 330 flow [2024-06-03 18:37:09,285 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.0) internal successors, (96), 6 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) [2024-06-03 18:37:09,285 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:37:09,285 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:37:09,285 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-03 18:37:09,285 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 18:37:09,286 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:37:09,286 INFO L85 PathProgramCache]: Analyzing trace with hash -1033237428, now seen corresponding path program 1 times [2024-06-03 18:37:09,286 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:37:09,288 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1582828491] [2024-06-03 18:37:09,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:37:09,288 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:37:09,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:37:09,460 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:37:09,461 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:37:09,461 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1582828491] [2024-06-03 18:37:09,463 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1582828491] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:37:09,463 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:37:09,463 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-03 18:37:09,464 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [410099527] [2024-06-03 18:37:09,464 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:37:09,464 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-03 18:37:09,464 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:37:09,464 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-03 18:37:09,465 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-03 18:37:09,491 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-03 18:37:09,492 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 55 transitions, 330 flow. Second operand has 6 states, 6 states have (on average 16.0) internal successors, (96), 6 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) [2024-06-03 18:37:09,492 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:37:09,492 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-03 18:37:09,492 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:37:09,622 INFO L124 PetriNetUnfolderBase]: 697/1171 cut-off events. [2024-06-03 18:37:09,622 INFO L125 PetriNetUnfolderBase]: For 3078/3080 co-relation queries the response was YES. [2024-06-03 18:37:09,624 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4055 conditions, 1171 events. 697/1171 cut-off events. For 3078/3080 co-relation queries the response was YES. Maximal size of possible extension queue 70. Compared 5863 event pairs, 278 based on Foata normal form. 6/1176 useless extension candidates. Maximal degree in co-relation 4027. Up to 1029 conditions per place. [2024-06-03 18:37:09,629 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 57 selfloop transitions, 10 changer transitions 0/74 dead transitions. [2024-06-03 18:37:09,630 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 74 transitions, 519 flow [2024-06-03 18:37:09,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-03 18:37:09,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-03 18:37:09,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 121 transitions. [2024-06-03 18:37:09,631 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5902439024390244 [2024-06-03 18:37:09,631 INFO L175 Difference]: Start difference. First operand has 60 places, 55 transitions, 330 flow. Second operand 5 states and 121 transitions. [2024-06-03 18:37:09,631 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 74 transitions, 519 flow [2024-06-03 18:37:09,634 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 74 transitions, 489 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-03 18:37:09,636 INFO L231 Difference]: Finished difference. Result has 62 places, 57 transitions, 341 flow [2024-06-03 18:37:09,636 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=300, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=341, PETRI_PLACES=62, PETRI_TRANSITIONS=57} [2024-06-03 18:37:09,637 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 20 predicate places. [2024-06-03 18:37:09,637 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 57 transitions, 341 flow [2024-06-03 18:37:09,637 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.0) internal successors, (96), 6 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) [2024-06-03 18:37:09,637 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:37:09,637 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:37:09,637 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-03 18:37:09,637 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 18:37:09,638 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:37:09,638 INFO L85 PathProgramCache]: Analyzing trace with hash -508420352, now seen corresponding path program 1 times [2024-06-03 18:37:09,638 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:37:09,638 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [265424441] [2024-06-03 18:37:09,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:37:09,639 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:37:09,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:37:09,788 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:37:09,789 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:37:09,789 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [265424441] [2024-06-03 18:37:09,789 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [265424441] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:37:09,789 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:37:09,789 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 18:37:09,789 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1054325471] [2024-06-03 18:37:09,790 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:37:09,790 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 18:37:09,790 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:37:09,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 18:37:09,791 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-03 18:37:09,820 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 18:37:09,820 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 57 transitions, 341 flow. Second operand has 7 states, 7 states have (on average 14.857142857142858) internal successors, (104), 7 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:37:09,821 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:37:09,821 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 18:37:09,821 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:37:09,952 INFO L124 PetriNetUnfolderBase]: 888/1472 cut-off events. [2024-06-03 18:37:09,953 INFO L125 PetriNetUnfolderBase]: For 4343/4347 co-relation queries the response was YES. [2024-06-03 18:37:09,955 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5178 conditions, 1472 events. 888/1472 cut-off events. For 4343/4347 co-relation queries the response was YES. Maximal size of possible extension queue 78. Compared 7234 event pairs, 323 based on Foata normal form. 6/1476 useless extension candidates. Maximal degree in co-relation 5149. Up to 1228 conditions per place. [2024-06-03 18:37:09,961 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 71 selfloop transitions, 19 changer transitions 0/96 dead transitions. [2024-06-03 18:37:09,961 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 96 transitions, 695 flow [2024-06-03 18:37:09,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 18:37:09,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 18:37:09,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 146 transitions. [2024-06-03 18:37:09,964 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5934959349593496 [2024-06-03 18:37:09,964 INFO L175 Difference]: Start difference. First operand has 62 places, 57 transitions, 341 flow. Second operand 6 states and 146 transitions. [2024-06-03 18:37:09,964 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 96 transitions, 695 flow [2024-06-03 18:37:09,968 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 96 transitions, 672 flow, removed 3 selfloop flow, removed 3 redundant places. [2024-06-03 18:37:09,969 INFO L231 Difference]: Finished difference. Result has 67 places, 69 transitions, 467 flow [2024-06-03 18:37:09,970 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=318, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=467, PETRI_PLACES=67, PETRI_TRANSITIONS=69} [2024-06-03 18:37:09,970 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 25 predicate places. [2024-06-03 18:37:09,970 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 69 transitions, 467 flow [2024-06-03 18:37:09,970 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.857142857142858) internal successors, (104), 7 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:37:09,970 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:37:09,971 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:37:09,971 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-03 18:37:09,971 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 18:37:09,971 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:37:09,971 INFO L85 PathProgramCache]: Analyzing trace with hash -1910817844, now seen corresponding path program 2 times [2024-06-03 18:37:09,971 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:37:09,972 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1018255720] [2024-06-03 18:37:09,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:37:09,972 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:37:09,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:37:10,112 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:37:10,113 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:37:10,113 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1018255720] [2024-06-03 18:37:10,113 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1018255720] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:37:10,113 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:37:10,113 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 18:37:10,113 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [508523808] [2024-06-03 18:37:10,113 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:37:10,114 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 18:37:10,114 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:37:10,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 18:37:10,114 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-03 18:37:10,145 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 18:37:10,145 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 69 transitions, 467 flow. Second operand has 7 states, 7 states have (on average 14.857142857142858) internal successors, (104), 7 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:37:10,145 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:37:10,145 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 18:37:10,145 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:37:10,308 INFO L124 PetriNetUnfolderBase]: 899/1495 cut-off events. [2024-06-03 18:37:10,308 INFO L125 PetriNetUnfolderBase]: For 5633/5643 co-relation queries the response was YES. [2024-06-03 18:37:10,311 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5645 conditions, 1495 events. 899/1495 cut-off events. For 5633/5643 co-relation queries the response was YES. Maximal size of possible extension queue 78. Compared 7443 event pairs, 310 based on Foata normal form. 12/1507 useless extension candidates. Maximal degree in co-relation 5613. Up to 1258 conditions per place. [2024-06-03 18:37:10,317 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 80 selfloop transitions, 19 changer transitions 0/105 dead transitions. [2024-06-03 18:37:10,317 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 105 transitions, 815 flow [2024-06-03 18:37:10,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 18:37:10,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 18:37:10,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 165 transitions. [2024-06-03 18:37:10,318 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5749128919860628 [2024-06-03 18:37:10,319 INFO L175 Difference]: Start difference. First operand has 67 places, 69 transitions, 467 flow. Second operand 7 states and 165 transitions. [2024-06-03 18:37:10,319 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 105 transitions, 815 flow [2024-06-03 18:37:10,324 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 105 transitions, 779 flow, removed 11 selfloop flow, removed 2 redundant places. [2024-06-03 18:37:10,326 INFO L231 Difference]: Finished difference. Result has 73 places, 74 transitions, 525 flow [2024-06-03 18:37:10,326 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=435, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=525, PETRI_PLACES=73, PETRI_TRANSITIONS=74} [2024-06-03 18:37:10,326 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 31 predicate places. [2024-06-03 18:37:10,326 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 74 transitions, 525 flow [2024-06-03 18:37:10,327 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.857142857142858) internal successors, (104), 7 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:37:10,327 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:37:10,327 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:37:10,327 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-03 18:37:10,327 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 18:37:10,327 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:37:10,328 INFO L85 PathProgramCache]: Analyzing trace with hash -1910823424, now seen corresponding path program 3 times [2024-06-03 18:37:10,328 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:37:10,328 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [812546508] [2024-06-03 18:37:10,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:37:10,328 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:37:10,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:37:10,462 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:37:10,463 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:37:10,463 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [812546508] [2024-06-03 18:37:10,463 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [812546508] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:37:10,463 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:37:10,463 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 18:37:10,463 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1274923025] [2024-06-03 18:37:10,463 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:37:10,464 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 18:37:10,464 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:37:10,464 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 18:37:10,464 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-03 18:37:10,501 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 18:37:10,501 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 74 transitions, 525 flow. Second operand has 7 states, 7 states have (on average 14.857142857142858) internal successors, (104), 7 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:37:10,501 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:37:10,502 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 18:37:10,502 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:37:10,662 INFO L124 PetriNetUnfolderBase]: 894/1486 cut-off events. [2024-06-03 18:37:10,662 INFO L125 PetriNetUnfolderBase]: For 6653/6659 co-relation queries the response was YES. [2024-06-03 18:37:10,665 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5746 conditions, 1486 events. 894/1486 cut-off events. For 6653/6659 co-relation queries the response was YES. Maximal size of possible extension queue 78. Compared 7329 event pairs, 323 based on Foata normal form. 8/1492 useless extension candidates. Maximal degree in co-relation 5712. Up to 1253 conditions per place. [2024-06-03 18:37:10,675 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 70 selfloop transitions, 18 changer transitions 0/94 dead transitions. [2024-06-03 18:37:10,675 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 94 transitions, 754 flow [2024-06-03 18:37:10,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-03 18:37:10,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-03 18:37:10,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 124 transitions. [2024-06-03 18:37:10,676 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6048780487804878 [2024-06-03 18:37:10,676 INFO L175 Difference]: Start difference. First operand has 73 places, 74 transitions, 525 flow. Second operand 5 states and 124 transitions. [2024-06-03 18:37:10,676 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 94 transitions, 754 flow [2024-06-03 18:37:10,684 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 94 transitions, 700 flow, removed 9 selfloop flow, removed 4 redundant places. [2024-06-03 18:37:10,685 INFO L231 Difference]: Finished difference. Result has 74 places, 74 transitions, 515 flow [2024-06-03 18:37:10,686 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=471, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=515, PETRI_PLACES=74, PETRI_TRANSITIONS=74} [2024-06-03 18:37:10,686 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 32 predicate places. [2024-06-03 18:37:10,688 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 74 transitions, 515 flow [2024-06-03 18:37:10,688 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.857142857142858) internal successors, (104), 7 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:37:10,688 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:37:10,688 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:37:10,688 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-03 18:37:10,689 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 18:37:10,689 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:37:10,689 INFO L85 PathProgramCache]: Analyzing trace with hash 1619345834, now seen corresponding path program 1 times [2024-06-03 18:37:10,689 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:37:10,689 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1678578227] [2024-06-03 18:37:10,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:37:10,690 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:37:10,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:37:10,839 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:37:10,840 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:37:10,840 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1678578227] [2024-06-03 18:37:10,840 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1678578227] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:37:10,840 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:37:10,840 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-03 18:37:10,840 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [379336322] [2024-06-03 18:37:10,840 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:37:10,841 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-03 18:37:10,841 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:37:10,841 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-03 18:37:10,842 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-03 18:37:10,862 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-03 18:37:10,862 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 74 transitions, 515 flow. Second operand has 5 states, 5 states have (on average 16.8) internal successors, (84), 5 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:37:10,863 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:37:10,863 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-03 18:37:10,863 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:37:11,004 INFO L124 PetriNetUnfolderBase]: 832/1382 cut-off events. [2024-06-03 18:37:11,004 INFO L125 PetriNetUnfolderBase]: For 7418/7420 co-relation queries the response was YES. [2024-06-03 18:37:11,007 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5520 conditions, 1382 events. 832/1382 cut-off events. For 7418/7420 co-relation queries the response was YES. Maximal size of possible extension queue 78. Compared 6843 event pairs, 278 based on Foata normal form. 3/1372 useless extension candidates. Maximal degree in co-relation 5485. Up to 1228 conditions per place. [2024-06-03 18:37:11,016 INFO L140 encePairwiseOnDemand]: 35/41 looper letters, 71 selfloop transitions, 9 changer transitions 0/91 dead transitions. [2024-06-03 18:37:11,016 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 91 transitions, 745 flow [2024-06-03 18:37:11,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-03 18:37:11,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-03 18:37:11,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 96 transitions. [2024-06-03 18:37:11,018 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5853658536585366 [2024-06-03 18:37:11,018 INFO L175 Difference]: Start difference. First operand has 74 places, 74 transitions, 515 flow. Second operand 4 states and 96 transitions. [2024-06-03 18:37:11,018 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 91 transitions, 745 flow [2024-06-03 18:37:11,024 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 91 transitions, 707 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-06-03 18:37:11,028 INFO L231 Difference]: Finished difference. Result has 75 places, 82 transitions, 567 flow [2024-06-03 18:37:11,028 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=479, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=567, PETRI_PLACES=75, PETRI_TRANSITIONS=82} [2024-06-03 18:37:11,029 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 33 predicate places. [2024-06-03 18:37:11,029 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 82 transitions, 567 flow [2024-06-03 18:37:11,029 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.8) internal successors, (84), 5 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:37:11,029 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:37:11,029 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:37:11,030 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-03 18:37:11,030 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 18:37:11,030 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:37:11,030 INFO L85 PathProgramCache]: Analyzing trace with hash 1734872291, now seen corresponding path program 1 times [2024-06-03 18:37:11,030 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:37:11,030 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [815722538] [2024-06-03 18:37:11,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:37:11,031 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:37:11,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:37:11,191 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:37:11,192 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:37:11,192 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [815722538] [2024-06-03 18:37:11,192 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [815722538] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:37:11,192 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:37:11,192 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 18:37:11,192 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1526513105] [2024-06-03 18:37:11,192 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:37:11,193 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 18:37:11,193 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:37:11,193 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 18:37:11,193 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-03 18:37:11,235 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-03 18:37:11,236 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 82 transitions, 567 flow. Second operand has 7 states, 7 states have (on average 15.857142857142858) internal successors, (111), 7 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) [2024-06-03 18:37:11,237 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:37:11,237 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-03 18:37:11,237 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:37:11,408 INFO L124 PetriNetUnfolderBase]: 854/1424 cut-off events. [2024-06-03 18:37:11,409 INFO L125 PetriNetUnfolderBase]: For 9336/9348 co-relation queries the response was YES. [2024-06-03 18:37:11,412 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6024 conditions, 1424 events. 854/1424 cut-off events. For 9336/9348 co-relation queries the response was YES. Maximal size of possible extension queue 80. Compared 7196 event pairs, 180 based on Foata normal form. 14/1390 useless extension candidates. Maximal degree in co-relation 5987. Up to 1100 conditions per place. [2024-06-03 18:37:11,416 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 65 selfloop transitions, 32 changer transitions 0/112 dead transitions. [2024-06-03 18:37:11,416 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 112 transitions, 903 flow [2024-06-03 18:37:11,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 18:37:11,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 18:37:11,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 150 transitions. [2024-06-03 18:37:11,418 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6097560975609756 [2024-06-03 18:37:11,418 INFO L175 Difference]: Start difference. First operand has 75 places, 82 transitions, 567 flow. Second operand 6 states and 150 transitions. [2024-06-03 18:37:11,418 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 112 transitions, 903 flow [2024-06-03 18:37:11,425 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 112 transitions, 899 flow, removed 2 selfloop flow, removed 0 redundant places. [2024-06-03 18:37:11,427 INFO L231 Difference]: Finished difference. Result has 81 places, 86 transitions, 674 flow [2024-06-03 18:37:11,427 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=563, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=674, PETRI_PLACES=81, PETRI_TRANSITIONS=86} [2024-06-03 18:37:11,428 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 39 predicate places. [2024-06-03 18:37:11,428 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 86 transitions, 674 flow [2024-06-03 18:37:11,428 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.857142857142858) internal successors, (111), 7 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) [2024-06-03 18:37:11,428 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:37:11,428 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:37:11,428 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-03 18:37:11,429 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 18:37:11,429 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:37:11,429 INFO L85 PathProgramCache]: Analyzing trace with hash 1834507795, now seen corresponding path program 2 times [2024-06-03 18:37:11,429 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:37:11,429 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2129815553] [2024-06-03 18:37:11,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:37:11,430 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:37:11,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:37:11,588 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:37:11,588 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:37:11,589 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2129815553] [2024-06-03 18:37:11,589 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2129815553] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:37:11,589 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:37:11,589 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 18:37:11,589 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [870124590] [2024-06-03 18:37:11,589 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:37:11,590 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 18:37:11,590 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:37:11,590 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 18:37:11,590 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-03 18:37:11,622 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-03 18:37:11,622 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 86 transitions, 674 flow. Second operand has 7 states, 7 states have (on average 15.857142857142858) internal successors, (111), 7 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) [2024-06-03 18:37:11,623 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:37:11,623 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-03 18:37:11,623 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:37:11,808 INFO L124 PetriNetUnfolderBase]: 871/1451 cut-off events. [2024-06-03 18:37:11,809 INFO L125 PetriNetUnfolderBase]: For 11627/11646 co-relation queries the response was YES. [2024-06-03 18:37:11,813 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6503 conditions, 1451 events. 871/1451 cut-off events. For 11627/11646 co-relation queries the response was YES. Maximal size of possible extension queue 81. Compared 7326 event pairs, 252 based on Foata normal form. 12/1411 useless extension candidates. Maximal degree in co-relation 6463. Up to 1198 conditions per place. [2024-06-03 18:37:11,819 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 66 selfloop transitions, 30 changer transitions 0/111 dead transitions. [2024-06-03 18:37:11,819 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 111 transitions, 946 flow [2024-06-03 18:37:11,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 18:37:11,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 18:37:11,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 147 transitions. [2024-06-03 18:37:11,820 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5975609756097561 [2024-06-03 18:37:11,821 INFO L175 Difference]: Start difference. First operand has 81 places, 86 transitions, 674 flow. Second operand 6 states and 147 transitions. [2024-06-03 18:37:11,821 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 111 transitions, 946 flow [2024-06-03 18:37:11,834 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 111 transitions, 894 flow, removed 11 selfloop flow, removed 2 redundant places. [2024-06-03 18:37:11,836 INFO L231 Difference]: Finished difference. Result has 85 places, 88 transitions, 716 flow [2024-06-03 18:37:11,836 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=626, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=716, PETRI_PLACES=85, PETRI_TRANSITIONS=88} [2024-06-03 18:37:11,837 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 43 predicate places. [2024-06-03 18:37:11,837 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 88 transitions, 716 flow [2024-06-03 18:37:11,837 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.857142857142858) internal successors, (111), 7 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) [2024-06-03 18:37:11,838 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:37:11,838 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:37:11,838 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-03 18:37:11,838 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 18:37:11,838 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:37:11,838 INFO L85 PathProgramCache]: Analyzing trace with hash 894011795, now seen corresponding path program 3 times [2024-06-03 18:37:11,839 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:37:11,839 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1275212972] [2024-06-03 18:37:11,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:37:11,839 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:37:11,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:37:12,005 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:37:12,006 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:37:12,006 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1275212972] [2024-06-03 18:37:12,006 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1275212972] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:37:12,006 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:37:12,006 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 18:37:12,006 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1640843151] [2024-06-03 18:37:12,006 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:37:12,007 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 18:37:12,007 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:37:12,007 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 18:37:12,007 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-03 18:37:12,046 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-03 18:37:12,047 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 88 transitions, 716 flow. Second operand has 7 states, 7 states have (on average 15.857142857142858) internal successors, (111), 7 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) [2024-06-03 18:37:12,047 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:37:12,047 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-03 18:37:12,047 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:37:12,223 INFO L124 PetriNetUnfolderBase]: 859/1435 cut-off events. [2024-06-03 18:37:12,223 INFO L125 PetriNetUnfolderBase]: For 12686/12705 co-relation queries the response was YES. [2024-06-03 18:37:12,226 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6519 conditions, 1435 events. 859/1435 cut-off events. For 12686/12705 co-relation queries the response was YES. Maximal size of possible extension queue 80. Compared 7256 event pairs, 175 based on Foata normal form. 19/1405 useless extension candidates. Maximal degree in co-relation 6477. Up to 1161 conditions per place. [2024-06-03 18:37:12,232 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 65 selfloop transitions, 27 changer transitions 0/107 dead transitions. [2024-06-03 18:37:12,232 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 107 transitions, 948 flow [2024-06-03 18:37:12,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-03 18:37:12,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-03 18:37:12,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 127 transitions. [2024-06-03 18:37:12,233 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6195121951219512 [2024-06-03 18:37:12,233 INFO L175 Difference]: Start difference. First operand has 85 places, 88 transitions, 716 flow. Second operand 5 states and 127 transitions. [2024-06-03 18:37:12,233 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 107 transitions, 948 flow [2024-06-03 18:37:12,244 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 107 transitions, 874 flow, removed 9 selfloop flow, removed 4 redundant places. [2024-06-03 18:37:12,261 INFO L231 Difference]: Finished difference. Result has 86 places, 88 transitions, 708 flow [2024-06-03 18:37:12,261 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=642, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=708, PETRI_PLACES=86, PETRI_TRANSITIONS=88} [2024-06-03 18:37:12,262 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 44 predicate places. [2024-06-03 18:37:12,262 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 88 transitions, 708 flow [2024-06-03 18:37:12,262 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.857142857142858) internal successors, (111), 7 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) [2024-06-03 18:37:12,263 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:37:12,263 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:37:12,263 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-03 18:37:12,263 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 18:37:12,263 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:37:12,263 INFO L85 PathProgramCache]: Analyzing trace with hash 946601761, now seen corresponding path program 1 times [2024-06-03 18:37:12,264 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:37:12,264 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1871424076] [2024-06-03 18:37:12,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:37:12,264 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:37:12,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:37:12,415 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:37:12,415 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:37:12,415 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1871424076] [2024-06-03 18:37:12,416 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1871424076] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:37:12,416 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:37:12,416 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 18:37:12,416 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [611442586] [2024-06-03 18:37:12,416 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:37:12,416 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 18:37:12,417 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:37:12,417 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 18:37:12,417 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-03 18:37:12,452 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 18:37:12,453 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 88 transitions, 708 flow. Second operand has 8 states, 8 states have (on average 14.75) internal successors, (118), 8 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:37:12,453 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:37:12,453 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 18:37:12,453 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:37:12,668 INFO L124 PetriNetUnfolderBase]: 1027/1715 cut-off events. [2024-06-03 18:37:12,669 INFO L125 PetriNetUnfolderBase]: For 14612/14618 co-relation queries the response was YES. [2024-06-03 18:37:12,673 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7480 conditions, 1715 events. 1027/1715 cut-off events. For 14612/14618 co-relation queries the response was YES. Maximal size of possible extension queue 100. Compared 8924 event pairs, 225 based on Foata normal form. 18/1732 useless extension candidates. Maximal degree in co-relation 7437. Up to 1134 conditions per place. [2024-06-03 18:37:12,679 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 102 selfloop transitions, 26 changer transitions 0/134 dead transitions. [2024-06-03 18:37:12,679 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 134 transitions, 1180 flow [2024-06-03 18:37:12,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 18:37:12,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 18:37:12,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 171 transitions. [2024-06-03 18:37:12,680 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5958188153310104 [2024-06-03 18:37:12,680 INFO L175 Difference]: Start difference. First operand has 86 places, 88 transitions, 708 flow. Second operand 7 states and 171 transitions. [2024-06-03 18:37:12,680 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 134 transitions, 1180 flow [2024-06-03 18:37:12,695 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 134 transitions, 1111 flow, removed 3 selfloop flow, removed 4 redundant places. [2024-06-03 18:37:12,697 INFO L231 Difference]: Finished difference. Result has 91 places, 93 transitions, 755 flow [2024-06-03 18:37:12,697 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=646, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=755, PETRI_PLACES=91, PETRI_TRANSITIONS=93} [2024-06-03 18:37:12,698 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 49 predicate places. [2024-06-03 18:37:12,698 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 93 transitions, 755 flow [2024-06-03 18:37:12,698 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.75) internal successors, (118), 8 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:37:12,698 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:37:12,698 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:37:12,698 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-03 18:37:12,699 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 18:37:12,699 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:37:12,699 INFO L85 PathProgramCache]: Analyzing trace with hash 1035167521, now seen corresponding path program 2 times [2024-06-03 18:37:12,699 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:37:12,699 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1376647715] [2024-06-03 18:37:12,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:37:12,700 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:37:12,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:37:12,844 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:37:12,845 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:37:12,846 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1376647715] [2024-06-03 18:37:12,848 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1376647715] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:37:12,848 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:37:12,848 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 18:37:12,848 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [713622815] [2024-06-03 18:37:12,848 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:37:12,849 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 18:37:12,849 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:37:12,849 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 18:37:12,850 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-03 18:37:12,889 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 18:37:12,889 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 93 transitions, 755 flow. Second operand has 8 states, 8 states have (on average 14.75) internal successors, (118), 8 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:37:12,889 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:37:12,889 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 18:37:12,889 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:37:13,107 INFO L124 PetriNetUnfolderBase]: 1154/1928 cut-off events. [2024-06-03 18:37:13,107 INFO L125 PetriNetUnfolderBase]: For 18386/18392 co-relation queries the response was YES. [2024-06-03 18:37:13,112 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8654 conditions, 1928 events. 1154/1928 cut-off events. For 18386/18392 co-relation queries the response was YES. Maximal size of possible extension queue 121. Compared 10339 event pairs, 334 based on Foata normal form. 18/1945 useless extension candidates. Maximal degree in co-relation 8608. Up to 1458 conditions per place. [2024-06-03 18:37:13,118 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 103 selfloop transitions, 25 changer transitions 0/134 dead transitions. [2024-06-03 18:37:13,119 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 134 transitions, 1204 flow [2024-06-03 18:37:13,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 18:37:13,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 18:37:13,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 171 transitions. [2024-06-03 18:37:13,120 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5958188153310104 [2024-06-03 18:37:13,120 INFO L175 Difference]: Start difference. First operand has 91 places, 93 transitions, 755 flow. Second operand 7 states and 171 transitions. [2024-06-03 18:37:13,120 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 134 transitions, 1204 flow [2024-06-03 18:37:13,140 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 134 transitions, 1174 flow, removed 3 selfloop flow, removed 2 redundant places. [2024-06-03 18:37:13,141 INFO L231 Difference]: Finished difference. Result has 97 places, 96 transitions, 813 flow [2024-06-03 18:37:13,142 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=725, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=93, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=813, PETRI_PLACES=97, PETRI_TRANSITIONS=96} [2024-06-03 18:37:13,142 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 55 predicate places. [2024-06-03 18:37:13,142 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 96 transitions, 813 flow [2024-06-03 18:37:13,142 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.75) internal successors, (118), 8 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:37:13,142 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:37:13,143 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:37:13,143 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-03 18:37:13,143 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 18:37:13,143 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:37:13,143 INFO L85 PathProgramCache]: Analyzing trace with hash 1035171241, now seen corresponding path program 3 times [2024-06-03 18:37:13,143 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:37:13,144 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [7918250] [2024-06-03 18:37:13,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:37:13,144 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:37:13,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:37:13,294 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:37:13,294 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:37:13,294 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [7918250] [2024-06-03 18:37:13,295 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [7918250] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:37:13,295 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:37:13,295 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 18:37:13,295 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [166412915] [2024-06-03 18:37:13,295 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:37:13,296 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 18:37:13,296 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:37:13,296 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 18:37:13,296 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-03 18:37:13,366 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 18:37:13,366 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 96 transitions, 813 flow. Second operand has 8 states, 8 states have (on average 14.75) internal successors, (118), 8 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:37:13,366 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:37:13,367 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 18:37:13,367 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:37:13,577 INFO L124 PetriNetUnfolderBase]: 1126/1884 cut-off events. [2024-06-03 18:37:13,578 INFO L125 PetriNetUnfolderBase]: For 19358/19364 co-relation queries the response was YES. [2024-06-03 18:37:13,583 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8588 conditions, 1884 events. 1126/1884 cut-off events. For 19358/19364 co-relation queries the response was YES. Maximal size of possible extension queue 117. Compared 9979 event pairs, 335 based on Foata normal form. 22/1905 useless extension candidates. Maximal degree in co-relation 8539. Up to 1537 conditions per place. [2024-06-03 18:37:13,588 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 100 selfloop transitions, 24 changer transitions 0/130 dead transitions. [2024-06-03 18:37:13,589 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 103 places, 130 transitions, 1171 flow [2024-06-03 18:37:13,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 18:37:13,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 18:37:13,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 166 transitions. [2024-06-03 18:37:13,590 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.578397212543554 [2024-06-03 18:37:13,590 INFO L175 Difference]: Start difference. First operand has 97 places, 96 transitions, 813 flow. Second operand 7 states and 166 transitions. [2024-06-03 18:37:13,590 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 103 places, 130 transitions, 1171 flow [2024-06-03 18:37:13,613 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 130 transitions, 1139 flow, removed 3 selfloop flow, removed 3 redundant places. [2024-06-03 18:37:13,615 INFO L231 Difference]: Finished difference. Result has 101 places, 97 transitions, 850 flow [2024-06-03 18:37:13,615 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=783, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=96, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=850, PETRI_PLACES=101, PETRI_TRANSITIONS=97} [2024-06-03 18:37:13,615 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 59 predicate places. [2024-06-03 18:37:13,616 INFO L495 AbstractCegarLoop]: Abstraction has has 101 places, 97 transitions, 850 flow [2024-06-03 18:37:13,616 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.75) internal successors, (118), 8 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:37:13,616 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:37:13,616 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:37:13,616 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-03 18:37:13,616 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 18:37:13,616 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:37:13,617 INFO L85 PathProgramCache]: Analyzing trace with hash 1944710463, now seen corresponding path program 4 times [2024-06-03 18:37:13,617 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:37:13,617 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [990741221] [2024-06-03 18:37:13,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:37:13,617 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:37:13,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:37:13,760 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:37:13,760 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:37:13,760 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [990741221] [2024-06-03 18:37:13,760 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [990741221] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:37:13,760 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:37:13,760 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 18:37:13,760 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [887294515] [2024-06-03 18:37:13,761 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:37:13,761 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 18:37:13,762 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:37:13,763 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 18:37:13,763 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-03 18:37:13,794 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 18:37:13,795 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 97 transitions, 850 flow. Second operand has 8 states, 8 states have (on average 14.75) internal successors, (118), 8 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:37:13,795 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:37:13,795 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 18:37:13,795 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:37:14,019 INFO L124 PetriNetUnfolderBase]: 1184/1992 cut-off events. [2024-06-03 18:37:14,019 INFO L125 PetriNetUnfolderBase]: For 21575/21581 co-relation queries the response was YES. [2024-06-03 18:37:14,024 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9149 conditions, 1992 events. 1184/1992 cut-off events. For 21575/21581 co-relation queries the response was YES. Maximal size of possible extension queue 129. Compared 10834 event pairs, 352 based on Foata normal form. 22/2013 useless extension candidates. Maximal degree in co-relation 9098. Up to 1653 conditions per place. [2024-06-03 18:37:14,031 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 102 selfloop transitions, 19 changer transitions 0/127 dead transitions. [2024-06-03 18:37:14,031 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 127 transitions, 1191 flow [2024-06-03 18:37:14,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 18:37:14,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 18:37:14,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 146 transitions. [2024-06-03 18:37:14,032 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5934959349593496 [2024-06-03 18:37:14,032 INFO L175 Difference]: Start difference. First operand has 101 places, 97 transitions, 850 flow. Second operand 6 states and 146 transitions. [2024-06-03 18:37:14,032 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 127 transitions, 1191 flow [2024-06-03 18:37:14,055 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 127 transitions, 1146 flow, removed 0 selfloop flow, removed 5 redundant places. [2024-06-03 18:37:14,057 INFO L231 Difference]: Finished difference. Result has 102 places, 98 transitions, 863 flow [2024-06-03 18:37:14,057 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=805, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=97, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=863, PETRI_PLACES=102, PETRI_TRANSITIONS=98} [2024-06-03 18:37:14,057 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 60 predicate places. [2024-06-03 18:37:14,057 INFO L495 AbstractCegarLoop]: Abstraction has has 102 places, 98 transitions, 863 flow [2024-06-03 18:37:14,057 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.75) internal successors, (118), 8 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:37:14,058 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:37:14,058 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:37:14,058 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-03 18:37:14,058 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 18:37:14,059 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:37:14,059 INFO L85 PathProgramCache]: Analyzing trace with hash 1944562593, now seen corresponding path program 5 times [2024-06-03 18:37:14,059 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:37:14,059 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1940165408] [2024-06-03 18:37:14,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:37:14,059 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:37:14,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:37:14,222 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:37:14,222 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:37:14,223 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1940165408] [2024-06-03 18:37:14,223 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1940165408] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:37:14,223 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:37:14,223 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 18:37:14,223 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2082958688] [2024-06-03 18:37:14,223 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:37:14,224 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 18:37:14,224 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:37:14,225 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 18:37:14,225 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-03 18:37:14,275 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 18:37:14,276 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 98 transitions, 863 flow. Second operand has 8 states, 8 states have (on average 14.75) internal successors, (118), 8 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:37:14,276 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:37:14,276 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 18:37:14,276 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:37:14,543 INFO L124 PetriNetUnfolderBase]: 1225/2063 cut-off events. [2024-06-03 18:37:14,543 INFO L125 PetriNetUnfolderBase]: For 23542/23548 co-relation queries the response was YES. [2024-06-03 18:37:14,549 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9551 conditions, 2063 events. 1225/2063 cut-off events. For 23542/23548 co-relation queries the response was YES. Maximal size of possible extension queue 138. Compared 11306 event pairs, 267 based on Foata normal form. 18/2080 useless extension candidates. Maximal degree in co-relation 9499. Up to 1479 conditions per place. [2024-06-03 18:37:14,556 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 106 selfloop transitions, 22 changer transitions 0/134 dead transitions. [2024-06-03 18:37:14,556 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 134 transitions, 1309 flow [2024-06-03 18:37:14,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 18:37:14,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 18:37:14,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 151 transitions. [2024-06-03 18:37:14,558 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6138211382113821 [2024-06-03 18:37:14,558 INFO L175 Difference]: Start difference. First operand has 102 places, 98 transitions, 863 flow. Second operand 6 states and 151 transitions. [2024-06-03 18:37:14,558 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 134 transitions, 1309 flow [2024-06-03 18:37:14,582 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 134 transitions, 1270 flow, removed 2 selfloop flow, removed 4 redundant places. [2024-06-03 18:37:14,584 INFO L231 Difference]: Finished difference. Result has 105 places, 100 transitions, 904 flow [2024-06-03 18:37:14,584 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=824, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=98, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=904, PETRI_PLACES=105, PETRI_TRANSITIONS=100} [2024-06-03 18:37:14,584 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 63 predicate places. [2024-06-03 18:37:14,584 INFO L495 AbstractCegarLoop]: Abstraction has has 105 places, 100 transitions, 904 flow [2024-06-03 18:37:14,585 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.75) internal successors, (118), 8 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:37:14,585 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:37:14,585 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:37:14,585 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-03 18:37:14,585 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 18:37:14,585 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:37:14,585 INFO L85 PathProgramCache]: Analyzing trace with hash 1950072843, now seen corresponding path program 6 times [2024-06-03 18:37:14,586 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:37:14,586 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1544045946] [2024-06-03 18:37:14,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:37:14,586 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:37:14,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:37:14,734 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:37:14,734 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:37:14,734 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1544045946] [2024-06-03 18:37:14,734 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1544045946] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:37:14,734 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:37:14,735 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 18:37:14,735 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1755034035] [2024-06-03 18:37:14,735 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:37:14,735 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 18:37:14,735 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:37:14,735 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 18:37:14,736 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-03 18:37:14,775 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 18:37:14,776 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 100 transitions, 904 flow. Second operand has 8 states, 8 states have (on average 14.75) internal successors, (118), 8 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:37:14,776 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:37:14,776 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 18:37:14,776 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:37:15,033 INFO L124 PetriNetUnfolderBase]: 1197/2020 cut-off events. [2024-06-03 18:37:15,034 INFO L125 PetriNetUnfolderBase]: For 24081/24089 co-relation queries the response was YES. [2024-06-03 18:37:15,040 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9323 conditions, 2020 events. 1197/2020 cut-off events. For 24081/24089 co-relation queries the response was YES. Maximal size of possible extension queue 134. Compared 11045 event pairs, 338 based on Foata normal form. 24/2044 useless extension candidates. Maximal degree in co-relation 9269. Up to 1680 conditions per place. [2024-06-03 18:37:15,047 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 111 selfloop transitions, 21 changer transitions 0/138 dead transitions. [2024-06-03 18:37:15,047 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 138 transitions, 1292 flow [2024-06-03 18:37:15,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 18:37:15,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 18:37:15,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 185 transitions. [2024-06-03 18:37:15,048 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5640243902439024 [2024-06-03 18:37:15,048 INFO L175 Difference]: Start difference. First operand has 105 places, 100 transitions, 904 flow. Second operand 8 states and 185 transitions. [2024-06-03 18:37:15,048 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 138 transitions, 1292 flow [2024-06-03 18:37:15,076 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 138 transitions, 1210 flow, removed 7 selfloop flow, removed 5 redundant places. [2024-06-03 18:37:15,078 INFO L231 Difference]: Finished difference. Result has 108 places, 101 transitions, 889 flow [2024-06-03 18:37:15,078 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=828, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=100, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=889, PETRI_PLACES=108, PETRI_TRANSITIONS=101} [2024-06-03 18:37:15,078 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 66 predicate places. [2024-06-03 18:37:15,079 INFO L495 AbstractCegarLoop]: Abstraction has has 108 places, 101 transitions, 889 flow [2024-06-03 18:37:15,079 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.75) internal successors, (118), 8 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:37:15,079 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:37:15,079 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:37:15,079 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-03 18:37:15,079 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 18:37:15,080 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:37:15,080 INFO L85 PathProgramCache]: Analyzing trace with hash 1950288045, now seen corresponding path program 1 times [2024-06-03 18:37:15,080 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:37:15,080 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [173280860] [2024-06-03 18:37:15,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:37:15,080 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:37:15,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:37:15,217 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:37:15,218 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:37:15,218 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [173280860] [2024-06-03 18:37:15,218 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [173280860] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:37:15,218 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:37:15,218 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 18:37:15,218 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2100399584] [2024-06-03 18:37:15,218 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:37:15,219 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 18:37:15,219 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:37:15,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 18:37:15,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-03 18:37:15,268 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 18:37:15,269 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 101 transitions, 889 flow. Second operand has 8 states, 8 states have (on average 14.75) internal successors, (118), 8 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:37:15,269 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:37:15,269 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 18:37:15,269 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:37:15,498 INFO L124 PetriNetUnfolderBase]: 1177/1988 cut-off events. [2024-06-03 18:37:15,498 INFO L125 PetriNetUnfolderBase]: For 22684/22692 co-relation queries the response was YES. [2024-06-03 18:37:15,504 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8890 conditions, 1988 events. 1177/1988 cut-off events. For 22684/22692 co-relation queries the response was YES. Maximal size of possible extension queue 132. Compared 10796 event pairs, 285 based on Foata normal form. 20/2008 useless extension candidates. Maximal degree in co-relation 8836. Up to 1441 conditions per place. [2024-06-03 18:37:15,511 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 110 selfloop transitions, 25 changer transitions 0/141 dead transitions. [2024-06-03 18:37:15,511 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 114 places, 141 transitions, 1243 flow [2024-06-03 18:37:15,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 18:37:15,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 18:37:15,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 187 transitions. [2024-06-03 18:37:15,512 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5701219512195121 [2024-06-03 18:37:15,512 INFO L175 Difference]: Start difference. First operand has 108 places, 101 transitions, 889 flow. Second operand 8 states and 187 transitions. [2024-06-03 18:37:15,512 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 114 places, 141 transitions, 1243 flow [2024-06-03 18:37:15,536 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 141 transitions, 1202 flow, removed 1 selfloop flow, removed 6 redundant places. [2024-06-03 18:37:15,538 INFO L231 Difference]: Finished difference. Result has 109 places, 100 transitions, 862 flow [2024-06-03 18:37:15,538 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=808, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=100, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=862, PETRI_PLACES=109, PETRI_TRANSITIONS=100} [2024-06-03 18:37:15,538 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 67 predicate places. [2024-06-03 18:37:15,539 INFO L495 AbstractCegarLoop]: Abstraction has has 109 places, 100 transitions, 862 flow [2024-06-03 18:37:15,539 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.75) internal successors, (118), 8 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:37:15,539 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:37:15,539 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:37:15,539 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-03 18:37:15,539 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 18:37:15,540 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:37:15,540 INFO L85 PathProgramCache]: Analyzing trace with hash 1198249931, now seen corresponding path program 1 times [2024-06-03 18:37:15,540 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:37:15,540 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [573168655] [2024-06-03 18:37:15,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:37:15,540 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:37:15,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:37:15,663 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:37:15,663 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:37:15,664 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [573168655] [2024-06-03 18:37:15,664 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [573168655] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:37:15,664 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:37:15,664 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-03 18:37:15,664 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [847718239] [2024-06-03 18:37:15,664 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:37:15,665 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-03 18:37:15,665 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:37:15,665 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-03 18:37:15,665 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-03 18:37:15,713 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-03 18:37:15,713 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 100 transitions, 862 flow. Second operand has 6 states, 6 states have (on average 16.5) internal successors, (99), 6 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:37:15,713 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:37:15,714 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-03 18:37:15,714 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:37:15,891 INFO L124 PetriNetUnfolderBase]: 1127/1918 cut-off events. [2024-06-03 18:37:15,892 INFO L125 PetriNetUnfolderBase]: For 22664/22667 co-relation queries the response was YES. [2024-06-03 18:37:15,898 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8746 conditions, 1918 events. 1127/1918 cut-off events. For 22664/22667 co-relation queries the response was YES. Maximal size of possible extension queue 131. Compared 10569 event pairs, 308 based on Foata normal form. 5/1908 useless extension candidates. Maximal degree in co-relation 8691. Up to 1703 conditions per place. [2024-06-03 18:37:15,904 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 80 selfloop transitions, 19 changer transitions 0/111 dead transitions. [2024-06-03 18:37:15,905 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 111 transitions, 1102 flow [2024-06-03 18:37:15,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-03 18:37:15,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-03 18:37:15,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 97 transitions. [2024-06-03 18:37:15,906 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5914634146341463 [2024-06-03 18:37:15,906 INFO L175 Difference]: Start difference. First operand has 109 places, 100 transitions, 862 flow. Second operand 4 states and 97 transitions. [2024-06-03 18:37:15,906 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 111 transitions, 1102 flow [2024-06-03 18:37:15,934 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 111 transitions, 1032 flow, removed 2 selfloop flow, removed 7 redundant places. [2024-06-03 18:37:15,935 INFO L231 Difference]: Finished difference. Result has 106 places, 103 transitions, 870 flow [2024-06-03 18:37:15,936 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=792, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=100, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=870, PETRI_PLACES=106, PETRI_TRANSITIONS=103} [2024-06-03 18:37:15,936 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 64 predicate places. [2024-06-03 18:37:15,936 INFO L495 AbstractCegarLoop]: Abstraction has has 106 places, 103 transitions, 870 flow [2024-06-03 18:37:15,936 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.5) internal successors, (99), 6 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:37:15,936 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:37:15,937 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:37:15,937 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-03 18:37:15,937 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 18:37:15,937 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:37:15,937 INFO L85 PathProgramCache]: Analyzing trace with hash -1551885911, now seen corresponding path program 2 times [2024-06-03 18:37:15,938 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:37:15,938 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1406928914] [2024-06-03 18:37:15,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:37:15,938 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:37:15,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:37:16,059 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:37:16,059 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:37:16,059 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1406928914] [2024-06-03 18:37:16,059 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1406928914] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:37:16,059 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:37:16,060 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-03 18:37:16,060 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [198276568] [2024-06-03 18:37:16,060 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:37:16,065 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-03 18:37:16,065 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:37:16,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-03 18:37:16,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-03 18:37:16,101 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-03 18:37:16,101 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 103 transitions, 870 flow. Second operand has 6 states, 6 states have (on average 16.5) internal successors, (99), 6 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:37:16,101 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:37:16,101 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-03 18:37:16,101 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:37:16,283 INFO L124 PetriNetUnfolderBase]: 1121/1910 cut-off events. [2024-06-03 18:37:16,283 INFO L125 PetriNetUnfolderBase]: For 23506/23509 co-relation queries the response was YES. [2024-06-03 18:37:16,289 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8697 conditions, 1910 events. 1121/1910 cut-off events. For 23506/23509 co-relation queries the response was YES. Maximal size of possible extension queue 130. Compared 10515 event pairs, 308 based on Foata normal form. 5/1900 useless extension candidates. Maximal degree in co-relation 8642. Up to 1690 conditions per place. [2024-06-03 18:37:16,296 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 81 selfloop transitions, 22 changer transitions 0/115 dead transitions. [2024-06-03 18:37:16,296 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 115 transitions, 1126 flow [2024-06-03 18:37:16,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-03 18:37:16,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-03 18:37:16,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 115 transitions. [2024-06-03 18:37:16,297 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5609756097560976 [2024-06-03 18:37:16,297 INFO L175 Difference]: Start difference. First operand has 106 places, 103 transitions, 870 flow. Second operand 5 states and 115 transitions. [2024-06-03 18:37:16,297 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 115 transitions, 1126 flow [2024-06-03 18:37:16,328 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 115 transitions, 1076 flow, removed 11 selfloop flow, removed 2 redundant places. [2024-06-03 18:37:16,329 INFO L231 Difference]: Finished difference. Result has 109 places, 106 transitions, 904 flow [2024-06-03 18:37:16,330 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=824, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=103, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=904, PETRI_PLACES=109, PETRI_TRANSITIONS=106} [2024-06-03 18:37:16,330 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 67 predicate places. [2024-06-03 18:37:16,330 INFO L495 AbstractCegarLoop]: Abstraction has has 109 places, 106 transitions, 904 flow [2024-06-03 18:37:16,330 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.5) internal successors, (99), 6 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:37:16,330 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:37:16,330 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:37:16,331 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-03 18:37:16,331 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 18:37:16,331 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:37:16,331 INFO L85 PathProgramCache]: Analyzing trace with hash -476668975, now seen corresponding path program 1 times [2024-06-03 18:37:16,331 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:37:16,331 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1306446350] [2024-06-03 18:37:16,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:37:16,332 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:37:16,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:37:16,444 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:37:16,445 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:37:16,445 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1306446350] [2024-06-03 18:37:16,445 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1306446350] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:37:16,445 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:37:16,445 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-03 18:37:16,445 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [731695173] [2024-06-03 18:37:16,445 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:37:16,446 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-03 18:37:16,446 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:37:16,446 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-03 18:37:16,446 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-03 18:37:16,476 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-03 18:37:16,477 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 106 transitions, 904 flow. Second operand has 6 states, 6 states have (on average 16.5) internal successors, (99), 6 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:37:16,477 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:37:16,477 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-03 18:37:16,477 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:37:16,646 INFO L124 PetriNetUnfolderBase]: 1109/1924 cut-off events. [2024-06-03 18:37:16,647 INFO L125 PetriNetUnfolderBase]: For 23992/23994 co-relation queries the response was YES. [2024-06-03 18:37:16,652 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8834 conditions, 1924 events. 1109/1924 cut-off events. For 23992/23994 co-relation queries the response was YES. Maximal size of possible extension queue 130. Compared 10752 event pairs, 306 based on Foata normal form. 4/1927 useless extension candidates. Maximal degree in co-relation 8778. Up to 1700 conditions per place. [2024-06-03 18:37:16,659 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 94 selfloop transitions, 22 changer transitions 0/125 dead transitions. [2024-06-03 18:37:16,659 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 125 transitions, 1272 flow [2024-06-03 18:37:16,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-03 18:37:16,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-03 18:37:16,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 119 transitions. [2024-06-03 18:37:16,660 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5804878048780487 [2024-06-03 18:37:16,660 INFO L175 Difference]: Start difference. First operand has 109 places, 106 transitions, 904 flow. Second operand 5 states and 119 transitions. [2024-06-03 18:37:16,660 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 125 transitions, 1272 flow [2024-06-03 18:37:16,691 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 125 transitions, 1214 flow, removed 9 selfloop flow, removed 3 redundant places. [2024-06-03 18:37:16,693 INFO L231 Difference]: Finished difference. Result has 111 places, 112 transitions, 962 flow [2024-06-03 18:37:16,693 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=846, PETRI_DIFFERENCE_MINUEND_PLACES=106, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=106, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=962, PETRI_PLACES=111, PETRI_TRANSITIONS=112} [2024-06-03 18:37:16,694 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 69 predicate places. [2024-06-03 18:37:16,694 INFO L495 AbstractCegarLoop]: Abstraction has has 111 places, 112 transitions, 962 flow [2024-06-03 18:37:16,694 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.5) internal successors, (99), 6 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:37:16,694 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:37:16,694 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:37:16,694 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-03 18:37:16,694 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 18:37:16,695 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:37:16,695 INFO L85 PathProgramCache]: Analyzing trace with hash -57282415, now seen corresponding path program 2 times [2024-06-03 18:37:16,695 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:37:16,695 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [192651815] [2024-06-03 18:37:16,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:37:16,695 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:37:16,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:37:16,813 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:37:16,813 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:37:16,814 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [192651815] [2024-06-03 18:37:16,814 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [192651815] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:37:16,814 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:37:16,814 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-03 18:37:16,814 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1577163356] [2024-06-03 18:37:16,814 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:37:16,814 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-03 18:37:16,814 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:37:16,815 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-03 18:37:16,815 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-03 18:37:16,848 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-03 18:37:16,848 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 112 transitions, 962 flow. Second operand has 6 states, 6 states have (on average 16.5) internal successors, (99), 6 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:37:16,848 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:37:16,848 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-03 18:37:16,849 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:37:17,041 INFO L124 PetriNetUnfolderBase]: 1104/1917 cut-off events. [2024-06-03 18:37:17,041 INFO L125 PetriNetUnfolderBase]: For 25924/25926 co-relation queries the response was YES. [2024-06-03 18:37:17,048 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9035 conditions, 1917 events. 1104/1917 cut-off events. For 25924/25926 co-relation queries the response was YES. Maximal size of possible extension queue 129. Compared 10731 event pairs, 306 based on Foata normal form. 4/1920 useless extension candidates. Maximal degree in co-relation 8978. Up to 1701 conditions per place. [2024-06-03 18:37:17,054 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 95 selfloop transitions, 19 changer transitions 0/123 dead transitions. [2024-06-03 18:37:17,055 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 114 places, 123 transitions, 1218 flow [2024-06-03 18:37:17,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-03 18:37:17,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-03 18:37:17,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 100 transitions. [2024-06-03 18:37:17,055 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6097560975609756 [2024-06-03 18:37:17,056 INFO L175 Difference]: Start difference. First operand has 111 places, 112 transitions, 962 flow. Second operand 4 states and 100 transitions. [2024-06-03 18:37:17,056 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 114 places, 123 transitions, 1218 flow [2024-06-03 18:37:17,089 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 123 transitions, 1163 flow, removed 21 selfloop flow, removed 1 redundant places. [2024-06-03 18:37:17,090 INFO L231 Difference]: Finished difference. Result has 114 places, 112 transitions, 957 flow [2024-06-03 18:37:17,091 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=907, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=112, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=957, PETRI_PLACES=114, PETRI_TRANSITIONS=112} [2024-06-03 18:37:17,091 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 72 predicate places. [2024-06-03 18:37:17,091 INFO L495 AbstractCegarLoop]: Abstraction has has 114 places, 112 transitions, 957 flow [2024-06-03 18:37:17,091 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.5) internal successors, (99), 6 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:37:17,091 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:37:17,091 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:37:17,092 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-03 18:37:17,092 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 18:37:17,092 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:37:17,092 INFO L85 PathProgramCache]: Analyzing trace with hash -1551871031, now seen corresponding path program 1 times [2024-06-03 18:37:17,092 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:37:17,092 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1029705765] [2024-06-03 18:37:17,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:37:17,093 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:37:17,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:37:17,219 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:37:17,219 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:37:17,219 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1029705765] [2024-06-03 18:37:17,219 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1029705765] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:37:17,219 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:37:17,219 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-03 18:37:17,219 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1344302950] [2024-06-03 18:37:17,219 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:37:17,220 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-03 18:37:17,220 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:37:17,220 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-03 18:37:17,220 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-03 18:37:17,246 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-03 18:37:17,247 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 112 transitions, 957 flow. Second operand has 6 states, 6 states have (on average 16.5) internal successors, (99), 6 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:37:17,247 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:37:17,247 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-03 18:37:17,247 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:37:17,446 INFO L124 PetriNetUnfolderBase]: 1111/1912 cut-off events. [2024-06-03 18:37:17,446 INFO L125 PetriNetUnfolderBase]: For 27477/27482 co-relation queries the response was YES. [2024-06-03 18:37:17,452 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8993 conditions, 1912 events. 1111/1912 cut-off events. For 27477/27482 co-relation queries the response was YES. Maximal size of possible extension queue 127. Compared 10628 event pairs, 292 based on Foata normal form. 7/1906 useless extension candidates. Maximal degree in co-relation 8934. Up to 1704 conditions per place. [2024-06-03 18:37:17,458 INFO L140 encePairwiseOnDemand]: 35/41 looper letters, 102 selfloop transitions, 11 changer transitions 0/125 dead transitions. [2024-06-03 18:37:17,459 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 125 transitions, 1228 flow [2024-06-03 18:37:17,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-03 18:37:17,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-03 18:37:17,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 113 transitions. [2024-06-03 18:37:17,460 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.551219512195122 [2024-06-03 18:37:17,460 INFO L175 Difference]: Start difference. First operand has 114 places, 112 transitions, 957 flow. Second operand 5 states and 113 transitions. [2024-06-03 18:37:17,461 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 125 transitions, 1228 flow [2024-06-03 18:37:17,497 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 125 transitions, 1190 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-03 18:37:17,498 INFO L231 Difference]: Finished difference. Result has 116 places, 114 transitions, 966 flow [2024-06-03 18:37:17,499 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=919, PETRI_DIFFERENCE_MINUEND_PLACES=111, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=112, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=101, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=966, PETRI_PLACES=116, PETRI_TRANSITIONS=114} [2024-06-03 18:37:17,499 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 74 predicate places. [2024-06-03 18:37:17,499 INFO L495 AbstractCegarLoop]: Abstraction has has 116 places, 114 transitions, 966 flow [2024-06-03 18:37:17,499 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.5) internal successors, (99), 6 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:37:17,499 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:37:17,500 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:37:17,500 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-03 18:37:17,500 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 18:37:17,500 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:37:17,500 INFO L85 PathProgramCache]: Analyzing trace with hash -1658312787, now seen corresponding path program 1 times [2024-06-03 18:37:17,500 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:37:17,500 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1671146296] [2024-06-03 18:37:17,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:37:17,501 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:37:17,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:37:17,618 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:37:17,618 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:37:17,618 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1671146296] [2024-06-03 18:37:17,618 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1671146296] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:37:17,618 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:37:17,618 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 18:37:17,618 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1455009936] [2024-06-03 18:37:17,619 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:37:17,619 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 18:37:17,619 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:37:17,619 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 18:37:17,619 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-03 18:37:17,646 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 18:37:17,647 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 114 transitions, 966 flow. Second operand has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:37:17,647 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:37:17,647 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 18:37:17,647 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:37:17,883 INFO L124 PetriNetUnfolderBase]: 1193/2032 cut-off events. [2024-06-03 18:37:17,883 INFO L125 PetriNetUnfolderBase]: For 28946/28952 co-relation queries the response was YES. [2024-06-03 18:37:17,889 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9648 conditions, 2032 events. 1193/2032 cut-off events. For 28946/28952 co-relation queries the response was YES. Maximal size of possible extension queue 129. Compared 11221 event pairs, 308 based on Foata normal form. 7/2039 useless extension candidates. Maximal degree in co-relation 9588. Up to 1807 conditions per place. [2024-06-03 18:37:17,896 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 118 selfloop transitions, 26 changer transitions 0/150 dead transitions. [2024-06-03 18:37:17,897 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 150 transitions, 1479 flow [2024-06-03 18:37:17,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 18:37:17,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 18:37:17,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 170 transitions. [2024-06-03 18:37:17,898 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5182926829268293 [2024-06-03 18:37:17,898 INFO L175 Difference]: Start difference. First operand has 116 places, 114 transitions, 966 flow. Second operand 8 states and 170 transitions. [2024-06-03 18:37:17,898 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 150 transitions, 1479 flow [2024-06-03 18:37:17,935 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 150 transitions, 1443 flow, removed 6 selfloop flow, removed 3 redundant places. [2024-06-03 18:37:17,937 INFO L231 Difference]: Finished difference. Result has 123 places, 129 transitions, 1138 flow [2024-06-03 18:37:17,937 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=935, PETRI_DIFFERENCE_MINUEND_PLACES=113, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=114, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=95, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1138, PETRI_PLACES=123, PETRI_TRANSITIONS=129} [2024-06-03 18:37:17,937 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 81 predicate places. [2024-06-03 18:37:17,937 INFO L495 AbstractCegarLoop]: Abstraction has has 123 places, 129 transitions, 1138 flow [2024-06-03 18:37:17,938 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:37:17,938 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:37:17,938 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:37:17,938 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-03 18:37:17,938 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 18:37:17,938 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:37:17,939 INFO L85 PathProgramCache]: Analyzing trace with hash -163893285, now seen corresponding path program 2 times [2024-06-03 18:37:17,939 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:37:17,939 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [876788574] [2024-06-03 18:37:17,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:37:17,939 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:37:17,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:37:18,055 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:37:18,055 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:37:18,055 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [876788574] [2024-06-03 18:37:18,055 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [876788574] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:37:18,056 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:37:18,056 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 18:37:18,056 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [499332800] [2024-06-03 18:37:18,056 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:37:18,056 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 18:37:18,056 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:37:18,057 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 18:37:18,057 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-03 18:37:18,082 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 18:37:18,082 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 129 transitions, 1138 flow. Second operand has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:37:18,082 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:37:18,082 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 18:37:18,082 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:37:18,283 INFO L124 PetriNetUnfolderBase]: 1198/2038 cut-off events. [2024-06-03 18:37:18,284 INFO L125 PetriNetUnfolderBase]: For 31774/31774 co-relation queries the response was YES. [2024-06-03 18:37:18,289 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10018 conditions, 2038 events. 1198/2038 cut-off events. For 31774/31774 co-relation queries the response was YES. Maximal size of possible extension queue 129. Compared 11224 event pairs, 317 based on Foata normal form. 1/2038 useless extension candidates. Maximal degree in co-relation 9955. Up to 1813 conditions per place. [2024-06-03 18:37:18,295 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 112 selfloop transitions, 26 changer transitions 0/144 dead transitions. [2024-06-03 18:37:18,296 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 127 places, 144 transitions, 1526 flow [2024-06-03 18:37:18,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-03 18:37:18,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-03 18:37:18,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 114 transitions. [2024-06-03 18:37:18,296 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5560975609756098 [2024-06-03 18:37:18,297 INFO L175 Difference]: Start difference. First operand has 123 places, 129 transitions, 1138 flow. Second operand 5 states and 114 transitions. [2024-06-03 18:37:18,297 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 127 places, 144 transitions, 1526 flow [2024-06-03 18:37:18,337 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 144 transitions, 1462 flow, removed 18 selfloop flow, removed 3 redundant places. [2024-06-03 18:37:18,339 INFO L231 Difference]: Finished difference. Result has 125 places, 132 transitions, 1158 flow [2024-06-03 18:37:18,339 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1080, PETRI_DIFFERENCE_MINUEND_PLACES=120, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=129, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=106, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1158, PETRI_PLACES=125, PETRI_TRANSITIONS=132} [2024-06-03 18:37:18,339 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 83 predicate places. [2024-06-03 18:37:18,340 INFO L495 AbstractCegarLoop]: Abstraction has has 125 places, 132 transitions, 1158 flow [2024-06-03 18:37:18,340 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:37:18,340 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:37:18,340 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:37:18,340 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-03 18:37:18,340 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 18:37:18,341 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:37:18,341 INFO L85 PathProgramCache]: Analyzing trace with hash -163904445, now seen corresponding path program 3 times [2024-06-03 18:37:18,341 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:37:18,341 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [931438249] [2024-06-03 18:37:18,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:37:18,341 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:37:18,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:37:18,456 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:37:18,456 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:37:18,456 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [931438249] [2024-06-03 18:37:18,457 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [931438249] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:37:18,457 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:37:18,457 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 18:37:18,457 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1534291940] [2024-06-03 18:37:18,457 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:37:18,457 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 18:37:18,457 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:37:18,458 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 18:37:18,458 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-03 18:37:18,492 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 18:37:18,492 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 132 transitions, 1158 flow. Second operand has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:37:18,493 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:37:18,493 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 18:37:18,493 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:37:18,725 INFO L124 PetriNetUnfolderBase]: 1195/2037 cut-off events. [2024-06-03 18:37:18,726 INFO L125 PetriNetUnfolderBase]: For 33315/33323 co-relation queries the response was YES. [2024-06-03 18:37:18,732 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10007 conditions, 2037 events. 1195/2037 cut-off events. For 33315/33323 co-relation queries the response was YES. Maximal size of possible extension queue 129. Compared 11264 event pairs, 308 based on Foata normal form. 9/2046 useless extension candidates. Maximal degree in co-relation 9943. Up to 1810 conditions per place. [2024-06-03 18:37:18,737 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 117 selfloop transitions, 28 changer transitions 0/151 dead transitions. [2024-06-03 18:37:18,737 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 131 places, 151 transitions, 1500 flow [2024-06-03 18:37:18,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 18:37:18,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 18:37:18,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 152 transitions. [2024-06-03 18:37:18,738 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5296167247386759 [2024-06-03 18:37:18,738 INFO L175 Difference]: Start difference. First operand has 125 places, 132 transitions, 1158 flow. Second operand 7 states and 152 transitions. [2024-06-03 18:37:18,738 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 131 places, 151 transitions, 1500 flow [2024-06-03 18:37:18,787 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 129 places, 151 transitions, 1451 flow, removed 8 selfloop flow, removed 2 redundant places. [2024-06-03 18:37:18,789 INFO L231 Difference]: Finished difference. Result has 130 places, 132 transitions, 1175 flow [2024-06-03 18:37:18,789 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1109, PETRI_DIFFERENCE_MINUEND_PLACES=123, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=132, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=104, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1175, PETRI_PLACES=130, PETRI_TRANSITIONS=132} [2024-06-03 18:37:18,790 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 88 predicate places. [2024-06-03 18:37:18,790 INFO L495 AbstractCegarLoop]: Abstraction has has 130 places, 132 transitions, 1175 flow [2024-06-03 18:37:18,790 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:37:18,790 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:37:18,790 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:37:18,790 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-03 18:37:18,790 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 18:37:18,791 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:37:18,791 INFO L85 PathProgramCache]: Analyzing trace with hash 1709081769, now seen corresponding path program 4 times [2024-06-03 18:37:18,791 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:37:18,791 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [854268618] [2024-06-03 18:37:18,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:37:18,791 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:37:18,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:37:18,911 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:37:18,911 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:37:18,911 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [854268618] [2024-06-03 18:37:18,911 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [854268618] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:37:18,911 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:37:18,911 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 18:37:18,912 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1611006479] [2024-06-03 18:37:18,912 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:37:18,912 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 18:37:18,912 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:37:18,912 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 18:37:18,912 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-03 18:37:18,947 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 18:37:18,948 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 130 places, 132 transitions, 1175 flow. Second operand has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:37:18,948 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:37:18,948 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 18:37:18,948 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:37:19,134 INFO L124 PetriNetUnfolderBase]: 1192/2017 cut-off events. [2024-06-03 18:37:19,134 INFO L125 PetriNetUnfolderBase]: For 35092/35092 co-relation queries the response was YES. [2024-06-03 18:37:19,141 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10043 conditions, 2017 events. 1192/2017 cut-off events. For 35092/35092 co-relation queries the response was YES. Maximal size of possible extension queue 129. Compared 11050 event pairs, 317 based on Foata normal form. 1/2017 useless extension candidates. Maximal degree in co-relation 9978. Up to 1800 conditions per place. [2024-06-03 18:37:19,146 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 113 selfloop transitions, 31 changer transitions 0/150 dead transitions. [2024-06-03 18:37:19,146 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 135 places, 150 transitions, 1535 flow [2024-06-03 18:37:19,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 18:37:19,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 18:37:19,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 130 transitions. [2024-06-03 18:37:19,147 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5284552845528455 [2024-06-03 18:37:19,147 INFO L175 Difference]: Start difference. First operand has 130 places, 132 transitions, 1175 flow. Second operand 6 states and 130 transitions. [2024-06-03 18:37:19,147 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 135 places, 150 transitions, 1535 flow [2024-06-03 18:37:19,197 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 150 transitions, 1466 flow, removed 1 selfloop flow, removed 7 redundant places. [2024-06-03 18:37:19,198 INFO L231 Difference]: Finished difference. Result has 130 places, 138 transitions, 1226 flow [2024-06-03 18:37:19,199 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1106, PETRI_DIFFERENCE_MINUEND_PLACES=123, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=132, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=102, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1226, PETRI_PLACES=130, PETRI_TRANSITIONS=138} [2024-06-03 18:37:19,199 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 88 predicate places. [2024-06-03 18:37:19,199 INFO L495 AbstractCegarLoop]: Abstraction has has 130 places, 138 transitions, 1226 flow [2024-06-03 18:37:19,199 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:37:19,199 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:37:19,200 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:37:19,200 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-03 18:37:19,200 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 18:37:19,200 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:37:19,200 INFO L85 PathProgramCache]: Analyzing trace with hash -1891835097, now seen corresponding path program 1 times [2024-06-03 18:37:19,200 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:37:19,200 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1077262928] [2024-06-03 18:37:19,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:37:19,201 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:37:19,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:37:19,319 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:37:19,320 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:37:19,320 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1077262928] [2024-06-03 18:37:19,320 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1077262928] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:37:19,320 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:37:19,320 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 18:37:19,320 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1622587084] [2024-06-03 18:37:19,320 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:37:19,320 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 18:37:19,321 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:37:19,321 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 18:37:19,321 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-03 18:37:19,362 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 18:37:19,362 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 130 places, 138 transitions, 1226 flow. Second operand has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:37:19,362 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:37:19,362 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 18:37:19,362 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:37:19,577 INFO L124 PetriNetUnfolderBase]: 1197/2028 cut-off events. [2024-06-03 18:37:19,577 INFO L125 PetriNetUnfolderBase]: For 34929/34931 co-relation queries the response was YES. [2024-06-03 18:37:19,585 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10271 conditions, 2028 events. 1197/2028 cut-off events. For 34929/34931 co-relation queries the response was YES. Maximal size of possible extension queue 129. Compared 11141 event pairs, 306 based on Foata normal form. 3/2031 useless extension candidates. Maximal degree in co-relation 10205. Up to 1823 conditions per place. [2024-06-03 18:37:19,591 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 141 selfloop transitions, 21 changer transitions 0/168 dead transitions. [2024-06-03 18:37:19,591 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 135 places, 168 transitions, 1756 flow [2024-06-03 18:37:19,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 18:37:19,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 18:37:19,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 134 transitions. [2024-06-03 18:37:19,592 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5447154471544715 [2024-06-03 18:37:19,592 INFO L175 Difference]: Start difference. First operand has 130 places, 138 transitions, 1226 flow. Second operand 6 states and 134 transitions. [2024-06-03 18:37:19,592 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 135 places, 168 transitions, 1756 flow [2024-06-03 18:37:19,650 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 133 places, 168 transitions, 1703 flow, removed 11 selfloop flow, removed 2 redundant places. [2024-06-03 18:37:19,652 INFO L231 Difference]: Finished difference. Result has 136 places, 150 transitions, 1344 flow [2024-06-03 18:37:19,652 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1175, PETRI_DIFFERENCE_MINUEND_PLACES=128, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=138, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=121, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1344, PETRI_PLACES=136, PETRI_TRANSITIONS=150} [2024-06-03 18:37:19,652 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 94 predicate places. [2024-06-03 18:37:19,652 INFO L495 AbstractCegarLoop]: Abstraction has has 136 places, 150 transitions, 1344 flow [2024-06-03 18:37:19,652 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:37:19,652 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:37:19,652 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:37:19,652 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-03 18:37:19,653 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 18:37:19,653 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:37:19,653 INFO L85 PathProgramCache]: Analyzing trace with hash -1775748045, now seen corresponding path program 2 times [2024-06-03 18:37:19,653 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:37:19,653 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2818102] [2024-06-03 18:37:19,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:37:19,653 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:37:19,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:37:19,794 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:37:19,795 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:37:19,795 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2818102] [2024-06-03 18:37:19,795 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2818102] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:37:19,795 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:37:19,795 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 18:37:19,795 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [579020434] [2024-06-03 18:37:19,795 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:37:19,796 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 18:37:19,796 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:37:19,796 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 18:37:19,796 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-03 18:37:19,825 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 18:37:19,825 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 136 places, 150 transitions, 1344 flow. Second operand has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:37:19,825 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:37:19,826 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 18:37:19,826 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:37:20,072 INFO L124 PetriNetUnfolderBase]: 1202/2037 cut-off events. [2024-06-03 18:37:20,072 INFO L125 PetriNetUnfolderBase]: For 37822/37826 co-relation queries the response was YES. [2024-06-03 18:37:20,080 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10699 conditions, 2037 events. 1202/2037 cut-off events. For 37822/37826 co-relation queries the response was YES. Maximal size of possible extension queue 130. Compared 11182 event pairs, 304 based on Foata normal form. 5/2042 useless extension candidates. Maximal degree in co-relation 10629. Up to 1835 conditions per place. [2024-06-03 18:37:20,086 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 145 selfloop transitions, 22 changer transitions 0/173 dead transitions. [2024-06-03 18:37:20,086 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 142 places, 173 transitions, 1836 flow [2024-06-03 18:37:20,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 18:37:20,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 18:37:20,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 150 transitions. [2024-06-03 18:37:20,087 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5226480836236934 [2024-06-03 18:37:20,087 INFO L175 Difference]: Start difference. First operand has 136 places, 150 transitions, 1344 flow. Second operand 7 states and 150 transitions. [2024-06-03 18:37:20,087 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 142 places, 173 transitions, 1836 flow [2024-06-03 18:37:20,139 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 140 places, 173 transitions, 1784 flow, removed 17 selfloop flow, removed 2 redundant places. [2024-06-03 18:37:20,140 INFO L231 Difference]: Finished difference. Result has 142 places, 155 transitions, 1398 flow [2024-06-03 18:37:20,141 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1298, PETRI_DIFFERENCE_MINUEND_PLACES=134, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=150, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=132, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1398, PETRI_PLACES=142, PETRI_TRANSITIONS=155} [2024-06-03 18:37:20,141 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 100 predicate places. [2024-06-03 18:37:20,141 INFO L495 AbstractCegarLoop]: Abstraction has has 142 places, 155 transitions, 1398 flow [2024-06-03 18:37:20,141 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:37:20,141 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:37:20,142 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:37:20,142 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-03 18:37:20,142 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 18:37:20,142 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:37:20,142 INFO L85 PathProgramCache]: Analyzing trace with hash -1775753625, now seen corresponding path program 3 times [2024-06-03 18:37:20,142 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:37:20,143 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2145384804] [2024-06-03 18:37:20,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:37:20,143 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:37:20,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:37:20,273 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:37:20,273 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:37:20,273 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2145384804] [2024-06-03 18:37:20,273 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2145384804] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:37:20,274 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:37:20,274 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 18:37:20,274 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [261528432] [2024-06-03 18:37:20,274 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:37:20,275 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 18:37:20,275 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:37:20,275 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 18:37:20,275 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-03 18:37:20,305 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 18:37:20,305 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 142 places, 155 transitions, 1398 flow. Second operand has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:37:20,305 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:37:20,305 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 18:37:20,305 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:37:20,539 INFO L124 PetriNetUnfolderBase]: 1199/2033 cut-off events. [2024-06-03 18:37:20,539 INFO L125 PetriNetUnfolderBase]: For 39693/39697 co-relation queries the response was YES. [2024-06-03 18:37:20,547 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10710 conditions, 2033 events. 1199/2033 cut-off events. For 39693/39697 co-relation queries the response was YES. Maximal size of possible extension queue 130. Compared 11155 event pairs, 306 based on Foata normal form. 5/2038 useless extension candidates. Maximal degree in co-relation 10638. Up to 1832 conditions per place. [2024-06-03 18:37:20,553 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 144 selfloop transitions, 20 changer transitions 0/170 dead transitions. [2024-06-03 18:37:20,553 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 146 places, 170 transitions, 1773 flow [2024-06-03 18:37:20,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-03 18:37:20,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-03 18:37:20,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 116 transitions. [2024-06-03 18:37:20,557 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5658536585365853 [2024-06-03 18:37:20,557 INFO L175 Difference]: Start difference. First operand has 142 places, 155 transitions, 1398 flow. Second operand 5 states and 116 transitions. [2024-06-03 18:37:20,557 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 146 places, 170 transitions, 1773 flow [2024-06-03 18:37:20,612 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 142 places, 170 transitions, 1701 flow, removed 15 selfloop flow, removed 4 redundant places. [2024-06-03 18:37:20,614 INFO L231 Difference]: Finished difference. Result has 143 places, 155 transitions, 1372 flow [2024-06-03 18:37:20,614 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1326, PETRI_DIFFERENCE_MINUEND_PLACES=138, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=155, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=135, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1372, PETRI_PLACES=143, PETRI_TRANSITIONS=155} [2024-06-03 18:37:20,614 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 101 predicate places. [2024-06-03 18:37:20,614 INFO L495 AbstractCegarLoop]: Abstraction has has 143 places, 155 transitions, 1372 flow [2024-06-03 18:37:20,614 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:37:20,615 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:37:20,615 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:37:20,615 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-03 18:37:20,615 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 18:37:20,615 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:37:20,615 INFO L85 PathProgramCache]: Analyzing trace with hash -1408165366, now seen corresponding path program 1 times [2024-06-03 18:37:20,615 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:37:20,615 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [688665656] [2024-06-03 18:37:20,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:37:20,615 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:37:20,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:37:20,767 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:37:20,767 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:37:20,767 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [688665656] [2024-06-03 18:37:20,767 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [688665656] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:37:20,768 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:37:20,768 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 18:37:20,768 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1782811096] [2024-06-03 18:37:20,768 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:37:20,768 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 18:37:20,768 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:37:20,769 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 18:37:20,769 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-03 18:37:20,812 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-03 18:37:20,812 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 143 places, 155 transitions, 1372 flow. Second operand has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:37:20,812 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:37:20,812 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-03 18:37:20,812 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:37:21,037 INFO L124 PetriNetUnfolderBase]: 1165/1986 cut-off events. [2024-06-03 18:37:21,037 INFO L125 PetriNetUnfolderBase]: For 43624/43629 co-relation queries the response was YES. [2024-06-03 18:37:21,045 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10551 conditions, 1986 events. 1165/1986 cut-off events. For 43624/43629 co-relation queries the response was YES. Maximal size of possible extension queue 132. Compared 11013 event pairs, 302 based on Foata normal form. 9/1980 useless extension candidates. Maximal degree in co-relation 10478. Up to 1713 conditions per place. [2024-06-03 18:37:21,052 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 121 selfloop transitions, 27 changer transitions 0/167 dead transitions. [2024-06-03 18:37:21,052 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 147 places, 167 transitions, 1720 flow [2024-06-03 18:37:21,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-03 18:37:21,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-03 18:37:21,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 116 transitions. [2024-06-03 18:37:21,054 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5658536585365853 [2024-06-03 18:37:21,054 INFO L175 Difference]: Start difference. First operand has 143 places, 155 transitions, 1372 flow. Second operand 5 states and 116 transitions. [2024-06-03 18:37:21,054 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 147 places, 167 transitions, 1720 flow [2024-06-03 18:37:21,150 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 143 places, 167 transitions, 1680 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-06-03 18:37:21,152 INFO L231 Difference]: Finished difference. Result has 144 places, 157 transitions, 1428 flow [2024-06-03 18:37:21,152 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1332, PETRI_DIFFERENCE_MINUEND_PLACES=139, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=155, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=128, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1428, PETRI_PLACES=144, PETRI_TRANSITIONS=157} [2024-06-03 18:37:21,153 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 102 predicate places. [2024-06-03 18:37:21,153 INFO L495 AbstractCegarLoop]: Abstraction has has 144 places, 157 transitions, 1428 flow [2024-06-03 18:37:21,153 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:37:21,153 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:37:21,153 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:37:21,153 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-03 18:37:21,154 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 18:37:21,154 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:37:21,154 INFO L85 PathProgramCache]: Analyzing trace with hash -1008668056, now seen corresponding path program 2 times [2024-06-03 18:37:21,154 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:37:21,154 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [632969806] [2024-06-03 18:37:21,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:37:21,154 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:37:21,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:37:21,326 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:37:21,326 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:37:21,326 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [632969806] [2024-06-03 18:37:21,327 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [632969806] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:37:21,327 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:37:21,327 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 18:37:21,327 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [371493109] [2024-06-03 18:37:21,327 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:37:21,327 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 18:37:21,327 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:37:21,328 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 18:37:21,328 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-03 18:37:21,367 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-03 18:37:21,367 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 144 places, 157 transitions, 1428 flow. Second operand has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:37:21,367 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:37:21,367 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-03 18:37:21,367 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:37:21,575 INFO L124 PetriNetUnfolderBase]: 1177/2006 cut-off events. [2024-06-03 18:37:21,575 INFO L125 PetriNetUnfolderBase]: For 46673/46678 co-relation queries the response was YES. [2024-06-03 18:37:21,583 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10882 conditions, 2006 events. 1177/2006 cut-off events. For 46673/46678 co-relation queries the response was YES. Maximal size of possible extension queue 135. Compared 11142 event pairs, 306 based on Foata normal form. 9/2000 useless extension candidates. Maximal degree in co-relation 10808. Up to 1739 conditions per place. [2024-06-03 18:37:21,588 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 121 selfloop transitions, 30 changer transitions 0/170 dead transitions. [2024-06-03 18:37:21,588 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 149 places, 170 transitions, 1788 flow [2024-06-03 18:37:21,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 18:37:21,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 18:37:21,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 133 transitions. [2024-06-03 18:37:21,589 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.540650406504065 [2024-06-03 18:37:21,589 INFO L175 Difference]: Start difference. First operand has 144 places, 157 transitions, 1428 flow. Second operand 6 states and 133 transitions. [2024-06-03 18:37:21,589 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 149 places, 170 transitions, 1788 flow [2024-06-03 18:37:21,701 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 146 places, 170 transitions, 1720 flow, removed 11 selfloop flow, removed 3 redundant places. [2024-06-03 18:37:21,703 INFO L231 Difference]: Finished difference. Result has 147 places, 159 transitions, 1462 flow [2024-06-03 18:37:21,703 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1360, PETRI_DIFFERENCE_MINUEND_PLACES=141, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=157, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=127, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1462, PETRI_PLACES=147, PETRI_TRANSITIONS=159} [2024-06-03 18:37:21,703 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 105 predicate places. [2024-06-03 18:37:21,703 INFO L495 AbstractCegarLoop]: Abstraction has has 147 places, 159 transitions, 1462 flow [2024-06-03 18:37:21,703 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:37:21,703 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:37:21,703 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:37:21,703 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-03 18:37:21,704 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 18:37:21,704 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:37:21,704 INFO L85 PathProgramCache]: Analyzing trace with hash -994383256, now seen corresponding path program 3 times [2024-06-03 18:37:21,704 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:37:21,704 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1067219528] [2024-06-03 18:37:21,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:37:21,704 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:37:21,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:37:21,823 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:37:21,823 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:37:21,823 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1067219528] [2024-06-03 18:37:21,824 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1067219528] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:37:21,824 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:37:21,824 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 18:37:21,824 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1165054175] [2024-06-03 18:37:21,824 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:37:21,824 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 18:37:21,824 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:37:21,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 18:37:21,825 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-03 18:37:21,868 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-03 18:37:21,868 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 147 places, 159 transitions, 1462 flow. Second operand has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:37:21,868 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:37:21,868 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-03 18:37:21,868 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:37:22,089 INFO L124 PetriNetUnfolderBase]: 1167/1992 cut-off events. [2024-06-03 18:37:22,089 INFO L125 PetriNetUnfolderBase]: For 47210/47215 co-relation queries the response was YES. [2024-06-03 18:37:22,097 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10777 conditions, 1992 events. 1167/1992 cut-off events. For 47210/47215 co-relation queries the response was YES. Maximal size of possible extension queue 135. Compared 11073 event pairs, 300 based on Foata normal form. 9/1986 useless extension candidates. Maximal degree in co-relation 10702. Up to 1687 conditions per place. [2024-06-03 18:37:22,104 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 120 selfloop transitions, 34 changer transitions 0/173 dead transitions. [2024-06-03 18:37:22,104 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 152 places, 173 transitions, 1834 flow [2024-06-03 18:37:22,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 18:37:22,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 18:37:22,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 134 transitions. [2024-06-03 18:37:22,135 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5447154471544715 [2024-06-03 18:37:22,135 INFO L175 Difference]: Start difference. First operand has 147 places, 159 transitions, 1462 flow. Second operand 6 states and 134 transitions. [2024-06-03 18:37:22,135 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 152 places, 173 transitions, 1834 flow [2024-06-03 18:37:22,207 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 148 places, 173 transitions, 1750 flow, removed 14 selfloop flow, removed 4 redundant places. [2024-06-03 18:37:22,209 INFO L231 Difference]: Finished difference. Result has 149 places, 161 transitions, 1491 flow [2024-06-03 18:37:22,210 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1378, PETRI_DIFFERENCE_MINUEND_PLACES=143, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=159, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=125, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1491, PETRI_PLACES=149, PETRI_TRANSITIONS=161} [2024-06-03 18:37:22,210 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 107 predicate places. [2024-06-03 18:37:22,210 INFO L495 AbstractCegarLoop]: Abstraction has has 149 places, 161 transitions, 1491 flow [2024-06-03 18:37:22,210 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:37:22,210 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:37:22,210 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:37:22,210 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-03 18:37:22,211 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 18:37:22,211 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:37:22,211 INFO L85 PathProgramCache]: Analyzing trace with hash 1923499314, now seen corresponding path program 1 times [2024-06-03 18:37:22,211 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:37:22,211 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1493466779] [2024-06-03 18:37:22,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:37:22,211 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:37:22,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:37:22,339 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:37:22,340 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:37:22,340 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1493466779] [2024-06-03 18:37:22,340 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1493466779] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:37:22,340 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:37:22,340 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 18:37:22,340 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1285498141] [2024-06-03 18:37:22,340 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:37:22,341 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 18:37:22,341 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:37:22,341 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 18:37:22,341 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-03 18:37:22,384 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-03 18:37:22,384 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 149 places, 161 transitions, 1491 flow. Second operand has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:37:22,384 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:37:22,384 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-03 18:37:22,384 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:37:22,637 INFO L124 PetriNetUnfolderBase]: 1178/2012 cut-off events. [2024-06-03 18:37:22,637 INFO L125 PetriNetUnfolderBase]: For 50400/50404 co-relation queries the response was YES. [2024-06-03 18:37:22,643 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11028 conditions, 2012 events. 1178/2012 cut-off events. For 50400/50404 co-relation queries the response was YES. Maximal size of possible extension queue 135. Compared 11192 event pairs, 261 based on Foata normal form. 8/2013 useless extension candidates. Maximal degree in co-relation 10952. Up to 1686 conditions per place. [2024-06-03 18:37:22,648 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 136 selfloop transitions, 32 changer transitions 0/184 dead transitions. [2024-06-03 18:37:22,649 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 154 places, 184 transitions, 2009 flow [2024-06-03 18:37:22,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 18:37:22,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 18:37:22,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 141 transitions. [2024-06-03 18:37:22,650 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.573170731707317 [2024-06-03 18:37:22,650 INFO L175 Difference]: Start difference. First operand has 149 places, 161 transitions, 1491 flow. Second operand 6 states and 141 transitions. [2024-06-03 18:37:22,650 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 154 places, 184 transitions, 2009 flow [2024-06-03 18:37:22,720 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 150 places, 184 transitions, 1912 flow, removed 16 selfloop flow, removed 4 redundant places. [2024-06-03 18:37:22,722 INFO L231 Difference]: Finished difference. Result has 151 places, 165 transitions, 1535 flow [2024-06-03 18:37:22,722 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1394, PETRI_DIFFERENCE_MINUEND_PLACES=145, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=161, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=131, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1535, PETRI_PLACES=151, PETRI_TRANSITIONS=165} [2024-06-03 18:37:22,722 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 109 predicate places. [2024-06-03 18:37:22,723 INFO L495 AbstractCegarLoop]: Abstraction has has 151 places, 165 transitions, 1535 flow [2024-06-03 18:37:22,723 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:37:22,723 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:37:22,723 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:37:22,723 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-03 18:37:22,723 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 18:37:22,724 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:37:22,724 INFO L85 PathProgramCache]: Analyzing trace with hash 1920820914, now seen corresponding path program 2 times [2024-06-03 18:37:22,724 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:37:22,724 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [100380418] [2024-06-03 18:37:22,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:37:22,724 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:37:22,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:37:22,861 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:37:22,861 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:37:22,861 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [100380418] [2024-06-03 18:37:22,861 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [100380418] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:37:22,861 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:37:22,861 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 18:37:22,862 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [847853533] [2024-06-03 18:37:22,862 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:37:22,863 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 18:37:22,863 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:37:22,863 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 18:37:22,863 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-03 18:37:22,907 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-03 18:37:22,907 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 151 places, 165 transitions, 1535 flow. Second operand has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:37:22,907 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:37:22,907 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-03 18:37:22,908 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:37:23,173 INFO L124 PetriNetUnfolderBase]: 1192/2034 cut-off events. [2024-06-03 18:37:23,174 INFO L125 PetriNetUnfolderBase]: For 53248/53252 co-relation queries the response was YES. [2024-06-03 18:37:23,181 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11232 conditions, 2034 events. 1192/2034 cut-off events. For 53248/53252 co-relation queries the response was YES. Maximal size of possible extension queue 138. Compared 11360 event pairs, 298 based on Foata normal form. 8/2035 useless extension candidates. Maximal degree in co-relation 11155. Up to 1768 conditions per place. [2024-06-03 18:37:23,186 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 135 selfloop transitions, 30 changer transitions 0/181 dead transitions. [2024-06-03 18:37:23,186 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 156 places, 181 transitions, 1937 flow [2024-06-03 18:37:23,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 18:37:23,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 18:37:23,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 136 transitions. [2024-06-03 18:37:23,187 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5528455284552846 [2024-06-03 18:37:23,187 INFO L175 Difference]: Start difference. First operand has 151 places, 165 transitions, 1535 flow. Second operand 6 states and 136 transitions. [2024-06-03 18:37:23,187 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 156 places, 181 transitions, 1937 flow [2024-06-03 18:37:23,272 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 154 places, 181 transitions, 1861 flow, removed 23 selfloop flow, removed 2 redundant places. [2024-06-03 18:37:23,274 INFO L231 Difference]: Finished difference. Result has 155 places, 167 transitions, 1567 flow [2024-06-03 18:37:23,274 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1467, PETRI_DIFFERENCE_MINUEND_PLACES=149, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=165, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=135, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1567, PETRI_PLACES=155, PETRI_TRANSITIONS=167} [2024-06-03 18:37:23,275 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 113 predicate places. [2024-06-03 18:37:23,275 INFO L495 AbstractCegarLoop]: Abstraction has has 155 places, 167 transitions, 1567 flow [2024-06-03 18:37:23,275 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:37:23,275 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:37:23,275 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:37:23,275 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-03 18:37:23,275 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 18:37:23,275 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:37:23,276 INFO L85 PathProgramCache]: Analyzing trace with hash 786208784, now seen corresponding path program 3 times [2024-06-03 18:37:23,276 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:37:23,276 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1461485030] [2024-06-03 18:37:23,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:37:23,276 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:37:23,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:37:23,414 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:37:23,414 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:37:23,414 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1461485030] [2024-06-03 18:37:23,415 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1461485030] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:37:23,415 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:37:23,415 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 18:37:23,415 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1224512895] [2024-06-03 18:37:23,415 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:37:23,416 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 18:37:23,418 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:37:23,418 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 18:37:23,418 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-03 18:37:23,479 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-03 18:37:23,480 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 155 places, 167 transitions, 1567 flow. Second operand has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:37:23,480 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:37:23,480 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-03 18:37:23,480 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:37:23,778 INFO L124 PetriNetUnfolderBase]: 1182/2020 cut-off events. [2024-06-03 18:37:23,778 INFO L125 PetriNetUnfolderBase]: For 53363/53367 co-relation queries the response was YES. [2024-06-03 18:37:23,787 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11046 conditions, 2020 events. 1182/2020 cut-off events. For 53363/53367 co-relation queries the response was YES. Maximal size of possible extension queue 138. Compared 11257 event pairs, 259 based on Foata normal form. 8/2021 useless extension candidates. Maximal degree in co-relation 10967. Up to 1726 conditions per place. [2024-06-03 18:37:23,793 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 140 selfloop transitions, 27 changer transitions 0/183 dead transitions. [2024-06-03 18:37:23,793 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 159 places, 183 transitions, 1941 flow [2024-06-03 18:37:23,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-03 18:37:23,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-03 18:37:23,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 122 transitions. [2024-06-03 18:37:23,794 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5951219512195122 [2024-06-03 18:37:23,794 INFO L175 Difference]: Start difference. First operand has 155 places, 167 transitions, 1567 flow. Second operand 5 states and 122 transitions. [2024-06-03 18:37:23,794 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 159 places, 183 transitions, 1941 flow [2024-06-03 18:37:23,878 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 155 places, 183 transitions, 1843 flow, removed 21 selfloop flow, removed 4 redundant places. [2024-06-03 18:37:23,880 INFO L231 Difference]: Finished difference. Result has 156 places, 167 transitions, 1533 flow [2024-06-03 18:37:23,880 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1469, PETRI_DIFFERENCE_MINUEND_PLACES=151, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=167, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=140, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1533, PETRI_PLACES=156, PETRI_TRANSITIONS=167} [2024-06-03 18:37:23,881 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 114 predicate places. [2024-06-03 18:37:23,881 INFO L495 AbstractCegarLoop]: Abstraction has has 156 places, 167 transitions, 1533 flow [2024-06-03 18:37:23,881 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:37:23,881 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:37:23,881 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:37:23,882 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-03 18:37:23,882 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 18:37:23,882 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:37:23,882 INFO L85 PathProgramCache]: Analyzing trace with hash 1011039204, now seen corresponding path program 1 times [2024-06-03 18:37:23,882 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:37:23,882 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [132393683] [2024-06-03 18:37:23,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:37:23,882 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:37:23,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:37:24,023 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:37:24,024 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:37:24,024 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [132393683] [2024-06-03 18:37:24,024 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [132393683] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:37:24,024 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:37:24,024 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 18:37:24,024 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1592542188] [2024-06-03 18:37:24,025 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:37:24,025 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 18:37:24,025 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:37:24,026 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 18:37:24,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-03 18:37:24,077 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 18:37:24,077 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 156 places, 167 transitions, 1533 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:37:24,077 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:37:24,077 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 18:37:24,077 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:37:24,380 INFO L124 PetriNetUnfolderBase]: 1317/2220 cut-off events. [2024-06-03 18:37:24,380 INFO L125 PetriNetUnfolderBase]: For 62654/62662 co-relation queries the response was YES. [2024-06-03 18:37:24,388 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12142 conditions, 2220 events. 1317/2220 cut-off events. For 62654/62662 co-relation queries the response was YES. Maximal size of possible extension queue 148. Compared 12406 event pairs, 246 based on Foata normal form. 14/2234 useless extension candidates. Maximal degree in co-relation 12062. Up to 1866 conditions per place. [2024-06-03 18:37:24,394 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 164 selfloop transitions, 35 changer transitions 0/205 dead transitions. [2024-06-03 18:37:24,394 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 164 places, 205 transitions, 2161 flow [2024-06-03 18:37:24,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 18:37:24,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 18:37:24,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 195 transitions. [2024-06-03 18:37:24,395 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5284552845528455 [2024-06-03 18:37:24,395 INFO L175 Difference]: Start difference. First operand has 156 places, 167 transitions, 1533 flow. Second operand 9 states and 195 transitions. [2024-06-03 18:37:24,395 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 164 places, 205 transitions, 2161 flow [2024-06-03 18:37:24,479 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 160 places, 205 transitions, 2099 flow, removed 2 selfloop flow, removed 4 redundant places. [2024-06-03 18:37:24,481 INFO L231 Difference]: Finished difference. Result has 163 places, 172 transitions, 1611 flow [2024-06-03 18:37:24,481 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1471, PETRI_DIFFERENCE_MINUEND_PLACES=152, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=167, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=134, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1611, PETRI_PLACES=163, PETRI_TRANSITIONS=172} [2024-06-03 18:37:24,482 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 121 predicate places. [2024-06-03 18:37:24,482 INFO L495 AbstractCegarLoop]: Abstraction has has 163 places, 172 transitions, 1611 flow [2024-06-03 18:37:24,482 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:37:24,482 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:37:24,483 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] [2024-06-03 18:37:24,483 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-03 18:37:24,483 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 18:37:24,483 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:37:24,483 INFO L85 PathProgramCache]: Analyzing trace with hash 1277062914, now seen corresponding path program 2 times [2024-06-03 18:37:24,483 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:37:24,484 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [939594948] [2024-06-03 18:37:24,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:37:24,484 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:37:24,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:37:24,631 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:37:24,631 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:37:24,631 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [939594948] [2024-06-03 18:37:24,631 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [939594948] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:37:24,632 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:37:24,632 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 18:37:24,632 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2017466514] [2024-06-03 18:37:24,632 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:37:24,632 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 18:37:24,632 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:37:24,633 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 18:37:24,633 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-03 18:37:24,668 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 18:37:24,669 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 163 places, 172 transitions, 1611 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:37:24,669 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:37:24,669 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 18:37:24,669 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:37:24,962 INFO L124 PetriNetUnfolderBase]: 1345/2268 cut-off events. [2024-06-03 18:37:24,962 INFO L125 PetriNetUnfolderBase]: For 67697/67705 co-relation queries the response was YES. [2024-06-03 18:37:24,972 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12576 conditions, 2268 events. 1345/2268 cut-off events. For 67697/67705 co-relation queries the response was YES. Maximal size of possible extension queue 154. Compared 12739 event pairs, 327 based on Foata normal form. 16/2284 useless extension candidates. Maximal degree in co-relation 12493. Up to 2010 conditions per place. [2024-06-03 18:37:24,979 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 162 selfloop transitions, 30 changer transitions 0/198 dead transitions. [2024-06-03 18:37:24,979 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 171 places, 198 transitions, 2090 flow [2024-06-03 18:37:24,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 18:37:24,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 18:37:24,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 188 transitions. [2024-06-03 18:37:24,980 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5094850948509485 [2024-06-03 18:37:24,980 INFO L175 Difference]: Start difference. First operand has 163 places, 172 transitions, 1611 flow. Second operand 9 states and 188 transitions. [2024-06-03 18:37:24,980 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 171 places, 198 transitions, 2090 flow [2024-06-03 18:37:25,113 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 167 places, 198 transitions, 2045 flow, removed 5 selfloop flow, removed 4 redundant places. [2024-06-03 18:37:25,116 INFO L231 Difference]: Finished difference. Result has 168 places, 173 transitions, 1644 flow [2024-06-03 18:37:25,116 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1568, PETRI_DIFFERENCE_MINUEND_PLACES=159, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=172, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=142, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1644, PETRI_PLACES=168, PETRI_TRANSITIONS=173} [2024-06-03 18:37:25,117 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 126 predicate places. [2024-06-03 18:37:25,117 INFO L495 AbstractCegarLoop]: Abstraction has has 168 places, 173 transitions, 1644 flow [2024-06-03 18:37:25,117 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:37:25,117 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:37:25,117 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:37:25,117 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-03 18:37:25,117 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 18:37:25,119 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:37:25,119 INFO L85 PathProgramCache]: Analyzing trace with hash 1276736484, now seen corresponding path program 3 times [2024-06-03 18:37:25,119 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:37:25,119 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [624614326] [2024-06-03 18:37:25,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:37:25,119 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:37:25,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:37:25,257 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:37:25,257 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:37:25,258 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [624614326] [2024-06-03 18:37:25,258 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [624614326] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:37:25,258 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:37:25,258 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 18:37:25,258 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1197450804] [2024-06-03 18:37:25,258 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:37:25,258 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 18:37:25,258 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:37:25,258 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 18:37:25,258 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-03 18:37:25,299 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 18:37:25,299 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 168 places, 173 transitions, 1644 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:37:25,299 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:37:25,299 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 18:37:25,299 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:37:25,602 INFO L124 PetriNetUnfolderBase]: 1373/2312 cut-off events. [2024-06-03 18:37:25,603 INFO L125 PetriNetUnfolderBase]: For 69678/69686 co-relation queries the response was YES. [2024-06-03 18:37:25,613 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12917 conditions, 2312 events. 1373/2312 cut-off events. For 69678/69686 co-relation queries the response was YES. Maximal size of possible extension queue 157. Compared 13028 event pairs, 325 based on Foata normal form. 14/2326 useless extension candidates. Maximal degree in co-relation 12832. Up to 2024 conditions per place. [2024-06-03 18:37:25,619 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 166 selfloop transitions, 33 changer transitions 0/205 dead transitions. [2024-06-03 18:37:25,620 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 177 places, 205 transitions, 2177 flow [2024-06-03 18:37:25,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 18:37:25,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 18:37:25,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 207 transitions. [2024-06-03 18:37:25,620 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5048780487804878 [2024-06-03 18:37:25,620 INFO L175 Difference]: Start difference. First operand has 168 places, 173 transitions, 1644 flow. Second operand 10 states and 207 transitions. [2024-06-03 18:37:25,620 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 177 places, 205 transitions, 2177 flow [2024-06-03 18:37:25,775 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 170 places, 205 transitions, 2118 flow, removed 1 selfloop flow, removed 7 redundant places. [2024-06-03 18:37:25,777 INFO L231 Difference]: Finished difference. Result has 172 places, 176 transitions, 1700 flow [2024-06-03 18:37:25,777 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1585, PETRI_DIFFERENCE_MINUEND_PLACES=161, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=173, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=140, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1700, PETRI_PLACES=172, PETRI_TRANSITIONS=176} [2024-06-03 18:37:25,778 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 130 predicate places. [2024-06-03 18:37:25,778 INFO L495 AbstractCegarLoop]: Abstraction has has 172 places, 176 transitions, 1700 flow [2024-06-03 18:37:25,778 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:37:25,778 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:37:25,778 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:37:25,778 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-03 18:37:25,778 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 18:37:25,779 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:37:25,779 INFO L85 PathProgramCache]: Analyzing trace with hash 1099577064, now seen corresponding path program 1 times [2024-06-03 18:37:25,779 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:37:25,779 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1632605118] [2024-06-03 18:37:25,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:37:25,779 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:37:25,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:37:25,893 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:37:25,893 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:37:25,893 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1632605118] [2024-06-03 18:37:25,894 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1632605118] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:37:25,894 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:37:25,894 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 18:37:25,894 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1972534772] [2024-06-03 18:37:25,894 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:37:25,894 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 18:37:25,894 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:37:25,895 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 18:37:25,895 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2024-06-03 18:37:25,925 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 18:37:25,925 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 172 places, 176 transitions, 1700 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:37:25,925 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:37:25,925 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 18:37:25,925 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:37:26,191 INFO L124 PetriNetUnfolderBase]: 1386/2341 cut-off events. [2024-06-03 18:37:26,191 INFO L125 PetriNetUnfolderBase]: For 70576/70584 co-relation queries the response was YES. [2024-06-03 18:37:26,201 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13240 conditions, 2341 events. 1386/2341 cut-off events. For 70576/70584 co-relation queries the response was YES. Maximal size of possible extension queue 160. Compared 13281 event pairs, 363 based on Foata normal form. 9/2349 useless extension candidates. Maximal degree in co-relation 13153. Up to 1969 conditions per place. [2024-06-03 18:37:26,208 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 150 selfloop transitions, 54 changer transitions 0/210 dead transitions. [2024-06-03 18:37:26,209 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 178 places, 210 transitions, 2444 flow [2024-06-03 18:37:26,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 18:37:26,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 18:37:26,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 165 transitions. [2024-06-03 18:37:26,223 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5749128919860628 [2024-06-03 18:37:26,223 INFO L175 Difference]: Start difference. First operand has 172 places, 176 transitions, 1700 flow. Second operand 7 states and 165 transitions. [2024-06-03 18:37:26,223 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 178 places, 210 transitions, 2444 flow [2024-06-03 18:37:26,409 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 171 places, 210 transitions, 2378 flow, removed 4 selfloop flow, removed 7 redundant places. [2024-06-03 18:37:26,411 INFO L231 Difference]: Finished difference. Result has 172 places, 185 transitions, 1868 flow [2024-06-03 18:37:26,411 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1634, PETRI_DIFFERENCE_MINUEND_PLACES=165, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=176, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=128, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1868, PETRI_PLACES=172, PETRI_TRANSITIONS=185} [2024-06-03 18:37:26,411 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 130 predicate places. [2024-06-03 18:37:26,412 INFO L495 AbstractCegarLoop]: Abstraction has has 172 places, 185 transitions, 1868 flow [2024-06-03 18:37:26,412 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:37:26,412 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:37:26,412 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] [2024-06-03 18:37:26,412 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-03 18:37:26,412 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 18:37:26,412 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:37:26,412 INFO L85 PathProgramCache]: Analyzing trace with hash 1099697034, now seen corresponding path program 2 times [2024-06-03 18:37:26,412 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:37:26,412 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [145445623] [2024-06-03 18:37:26,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:37:26,413 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:37:26,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:37:26,531 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:37:26,531 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:37:26,531 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [145445623] [2024-06-03 18:37:26,531 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [145445623] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:37:26,532 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:37:26,532 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 18:37:26,532 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1061636464] [2024-06-03 18:37:26,532 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:37:26,532 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 18:37:26,532 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:37:26,533 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 18:37:26,533 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-03 18:37:26,570 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 18:37:26,571 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 172 places, 185 transitions, 1868 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:37:26,571 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:37:26,571 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 18:37:26,571 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:37:26,843 INFO L124 PetriNetUnfolderBase]: 1396/2358 cut-off events. [2024-06-03 18:37:26,843 INFO L125 PetriNetUnfolderBase]: For 74951/74963 co-relation queries the response was YES. [2024-06-03 18:37:26,853 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13676 conditions, 2358 events. 1396/2358 cut-off events. For 74951/74963 co-relation queries the response was YES. Maximal size of possible extension queue 162. Compared 13411 event pairs, 351 based on Foata normal form. 13/2371 useless extension candidates. Maximal degree in co-relation 13588. Up to 2064 conditions per place. [2024-06-03 18:37:26,859 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 167 selfloop transitions, 38 changer transitions 0/211 dead transitions. [2024-06-03 18:37:26,859 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 178 places, 211 transitions, 2401 flow [2024-06-03 18:37:26,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 18:37:26,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 18:37:26,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 157 transitions. [2024-06-03 18:37:26,860 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5470383275261324 [2024-06-03 18:37:26,860 INFO L175 Difference]: Start difference. First operand has 172 places, 185 transitions, 1868 flow. Second operand 7 states and 157 transitions. [2024-06-03 18:37:26,860 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 178 places, 211 transitions, 2401 flow [2024-06-03 18:37:26,991 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 176 places, 211 transitions, 2296 flow, removed 36 selfloop flow, removed 2 redundant places. [2024-06-03 18:37:26,993 INFO L231 Difference]: Finished difference. Result has 177 places, 191 transitions, 1924 flow [2024-06-03 18:37:26,994 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1782, PETRI_DIFFERENCE_MINUEND_PLACES=170, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=185, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=150, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1924, PETRI_PLACES=177, PETRI_TRANSITIONS=191} [2024-06-03 18:37:26,994 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 135 predicate places. [2024-06-03 18:37:26,994 INFO L495 AbstractCegarLoop]: Abstraction has has 177 places, 191 transitions, 1924 flow [2024-06-03 18:37:26,994 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:37:26,994 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:37:26,994 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] [2024-06-03 18:37:26,994 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-03 18:37:26,994 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 18:37:26,995 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:37:26,995 INFO L85 PathProgramCache]: Analyzing trace with hash 1099697220, now seen corresponding path program 1 times [2024-06-03 18:37:26,995 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:37:26,995 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1009776463] [2024-06-03 18:37:26,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:37:26,995 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:37:26,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:37:27,130 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:37:27,130 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:37:27,130 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1009776463] [2024-06-03 18:37:27,130 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1009776463] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:37:27,130 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:37:27,130 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 18:37:27,130 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [580907616] [2024-06-03 18:37:27,130 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:37:27,131 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 18:37:27,131 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:37:27,131 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 18:37:27,131 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-03 18:37:27,170 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 18:37:27,170 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 177 places, 191 transitions, 1924 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:37:27,171 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:37:27,171 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 18:37:27,171 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:37:27,492 INFO L124 PetriNetUnfolderBase]: 1417/2391 cut-off events. [2024-06-03 18:37:27,492 INFO L125 PetriNetUnfolderBase]: For 80346/80358 co-relation queries the response was YES. [2024-06-03 18:37:27,502 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14095 conditions, 2391 events. 1417/2391 cut-off events. For 80346/80358 co-relation queries the response was YES. Maximal size of possible extension queue 166. Compared 13619 event pairs, 350 based on Foata normal form. 13/2404 useless extension candidates. Maximal degree in co-relation 14005. Up to 2052 conditions per place. [2024-06-03 18:37:27,509 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 156 selfloop transitions, 63 changer transitions 0/225 dead transitions. [2024-06-03 18:37:27,510 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 186 places, 225 transitions, 2728 flow [2024-06-03 18:37:27,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 18:37:27,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 18:37:27,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 213 transitions. [2024-06-03 18:37:27,511 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5195121951219512 [2024-06-03 18:37:27,511 INFO L175 Difference]: Start difference. First operand has 177 places, 191 transitions, 1924 flow. Second operand 10 states and 213 transitions. [2024-06-03 18:37:27,511 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 186 places, 225 transitions, 2728 flow [2024-06-03 18:37:27,652 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 182 places, 225 transitions, 2638 flow, removed 10 selfloop flow, removed 4 redundant places. [2024-06-03 18:37:27,655 INFO L231 Difference]: Finished difference. Result has 183 places, 200 transitions, 2110 flow [2024-06-03 18:37:27,655 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1834, PETRI_DIFFERENCE_MINUEND_PLACES=173, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=191, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=134, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2110, PETRI_PLACES=183, PETRI_TRANSITIONS=200} [2024-06-03 18:37:27,655 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 141 predicate places. [2024-06-03 18:37:27,655 INFO L495 AbstractCegarLoop]: Abstraction has has 183 places, 200 transitions, 2110 flow [2024-06-03 18:37:27,656 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:37:27,656 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:37:27,656 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] [2024-06-03 18:37:27,656 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-03 18:37:27,656 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 18:37:27,656 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:37:27,656 INFO L85 PathProgramCache]: Analyzing trace with hash 1277065890, now seen corresponding path program 2 times [2024-06-03 18:37:27,656 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:37:27,657 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1361342800] [2024-06-03 18:37:27,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:37:27,657 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:37:27,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:37:27,778 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:37:27,778 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:37:27,778 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1361342800] [2024-06-03 18:37:27,778 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1361342800] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:37:27,778 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:37:27,778 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 18:37:27,778 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [853403649] [2024-06-03 18:37:27,778 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:37:27,779 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 18:37:27,779 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:37:27,779 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 18:37:27,779 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-03 18:37:27,830 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 18:37:27,830 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 183 places, 200 transitions, 2110 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:37:27,831 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:37:27,831 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 18:37:27,831 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:37:28,137 INFO L124 PetriNetUnfolderBase]: 1448/2442 cut-off events. [2024-06-03 18:37:28,137 INFO L125 PetriNetUnfolderBase]: For 87044/87056 co-relation queries the response was YES. [2024-06-03 18:37:28,148 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14857 conditions, 2442 events. 1448/2442 cut-off events. For 87044/87056 co-relation queries the response was YES. Maximal size of possible extension queue 173. Compared 14003 event pairs, 350 based on Foata normal form. 13/2455 useless extension candidates. Maximal degree in co-relation 14766. Up to 2084 conditions per place. [2024-06-03 18:37:28,156 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 155 selfloop transitions, 75 changer transitions 0/236 dead transitions. [2024-06-03 18:37:28,156 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 191 places, 236 transitions, 3017 flow [2024-06-03 18:37:28,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 18:37:28,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 18:37:28,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 194 transitions. [2024-06-03 18:37:28,157 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5257452574525745 [2024-06-03 18:37:28,157 INFO L175 Difference]: Start difference. First operand has 183 places, 200 transitions, 2110 flow. Second operand 9 states and 194 transitions. [2024-06-03 18:37:28,157 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 191 places, 236 transitions, 3017 flow [2024-06-03 18:37:28,318 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 186 places, 236 transitions, 2842 flow, removed 56 selfloop flow, removed 5 redundant places. [2024-06-03 18:37:28,320 INFO L231 Difference]: Finished difference. Result has 187 places, 215 transitions, 2316 flow [2024-06-03 18:37:28,321 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1985, PETRI_DIFFERENCE_MINUEND_PLACES=178, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=200, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=140, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2316, PETRI_PLACES=187, PETRI_TRANSITIONS=215} [2024-06-03 18:37:28,321 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 145 predicate places. [2024-06-03 18:37:28,321 INFO L495 AbstractCegarLoop]: Abstraction has has 187 places, 215 transitions, 2316 flow [2024-06-03 18:37:28,321 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:37:28,321 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:37:28,321 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:37:28,321 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-03 18:37:28,321 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 18:37:28,321 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:37:28,322 INFO L85 PathProgramCache]: Analyzing trace with hash 1275639448, now seen corresponding path program 3 times [2024-06-03 18:37:28,322 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:37:28,322 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1402845194] [2024-06-03 18:37:28,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:37:28,322 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:37:28,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:37:28,451 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:37:28,452 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:37:28,452 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1402845194] [2024-06-03 18:37:28,452 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1402845194] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:37:28,452 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:37:28,452 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 18:37:28,452 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1964646542] [2024-06-03 18:37:28,452 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:37:28,452 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 18:37:28,453 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:37:28,453 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 18:37:28,453 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-03 18:37:28,495 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 18:37:28,496 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 187 places, 215 transitions, 2316 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:37:28,496 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:37:28,496 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 18:37:28,496 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:37:28,873 INFO L124 PetriNetUnfolderBase]: 1445/2436 cut-off events. [2024-06-03 18:37:28,873 INFO L125 PetriNetUnfolderBase]: For 89605/89617 co-relation queries the response was YES. [2024-06-03 18:37:28,885 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14893 conditions, 2436 events. 1445/2436 cut-off events. For 89605/89617 co-relation queries the response was YES. Maximal size of possible extension queue 173. Compared 13939 event pairs, 350 based on Foata normal form. 13/2449 useless extension candidates. Maximal degree in co-relation 14800. Up to 2081 conditions per place. [2024-06-03 18:37:28,893 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 156 selfloop transitions, 76 changer transitions 0/238 dead transitions. [2024-06-03 18:37:28,893 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 197 places, 238 transitions, 3010 flow [2024-06-03 18:37:28,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-03 18:37:28,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-03 18:37:28,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 228 transitions. [2024-06-03 18:37:28,894 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5055432372505543 [2024-06-03 18:37:28,894 INFO L175 Difference]: Start difference. First operand has 187 places, 215 transitions, 2316 flow. Second operand 11 states and 228 transitions. [2024-06-03 18:37:28,894 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 197 places, 238 transitions, 3010 flow [2024-06-03 18:37:29,129 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 194 places, 238 transitions, 2897 flow, removed 16 selfloop flow, removed 3 redundant places. [2024-06-03 18:37:29,132 INFO L231 Difference]: Finished difference. Result has 195 places, 215 transitions, 2361 flow [2024-06-03 18:37:29,132 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2203, PETRI_DIFFERENCE_MINUEND_PLACES=184, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=215, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=139, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2361, PETRI_PLACES=195, PETRI_TRANSITIONS=215} [2024-06-03 18:37:29,132 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 153 predicate places. [2024-06-03 18:37:29,132 INFO L495 AbstractCegarLoop]: Abstraction has has 195 places, 215 transitions, 2361 flow [2024-06-03 18:37:29,132 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:37:29,132 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:37:29,133 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:37:29,133 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-03 18:37:29,133 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 18:37:29,133 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:37:29,133 INFO L85 PathProgramCache]: Analyzing trace with hash -194331986, now seen corresponding path program 3 times [2024-06-03 18:37:29,133 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:37:29,135 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1325104397] [2024-06-03 18:37:29,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:37:29,135 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:37:29,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:37:29,266 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:37:29,266 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:37:29,266 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1325104397] [2024-06-03 18:37:29,267 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1325104397] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:37:29,267 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:37:29,267 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 18:37:29,267 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [187630835] [2024-06-03 18:37:29,267 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:37:29,267 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 18:37:29,267 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:37:29,268 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 18:37:29,268 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-03 18:37:29,307 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 18:37:29,307 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 195 places, 215 transitions, 2361 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:37:29,307 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:37:29,308 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 18:37:29,308 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:37:29,620 INFO L124 PetriNetUnfolderBase]: 1458/2458 cut-off events. [2024-06-03 18:37:29,620 INFO L125 PetriNetUnfolderBase]: For 94671/94683 co-relation queries the response was YES. [2024-06-03 18:37:29,632 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15153 conditions, 2458 events. 1458/2458 cut-off events. For 94671/94683 co-relation queries the response was YES. Maximal size of possible extension queue 175. Compared 14079 event pairs, 350 based on Foata normal form. 13/2471 useless extension candidates. Maximal degree in co-relation 15059. Up to 2141 conditions per place. [2024-06-03 18:37:29,640 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 184 selfloop transitions, 50 changer transitions 0/240 dead transitions. [2024-06-03 18:37:29,640 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 202 places, 240 transitions, 3035 flow [2024-06-03 18:37:29,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 18:37:29,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 18:37:29,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 172 transitions. [2024-06-03 18:37:29,641 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.524390243902439 [2024-06-03 18:37:29,641 INFO L175 Difference]: Start difference. First operand has 195 places, 215 transitions, 2361 flow. Second operand 8 states and 172 transitions. [2024-06-03 18:37:29,641 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 202 places, 240 transitions, 3035 flow [2024-06-03 18:37:29,844 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 194 places, 240 transitions, 2861 flow, removed 12 selfloop flow, removed 8 redundant places. [2024-06-03 18:37:29,847 INFO L231 Difference]: Finished difference. Result has 196 places, 221 transitions, 2383 flow [2024-06-03 18:37:29,847 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2187, PETRI_DIFFERENCE_MINUEND_PLACES=187, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=215, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=165, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2383, PETRI_PLACES=196, PETRI_TRANSITIONS=221} [2024-06-03 18:37:29,847 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 154 predicate places. [2024-06-03 18:37:29,847 INFO L495 AbstractCegarLoop]: Abstraction has has 196 places, 221 transitions, 2383 flow [2024-06-03 18:37:29,847 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:37:29,847 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:37:29,847 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] [2024-06-03 18:37:29,848 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-03 18:37:29,848 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 18:37:29,848 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:37:29,848 INFO L85 PathProgramCache]: Analyzing trace with hash 1412371866, now seen corresponding path program 4 times [2024-06-03 18:37:29,848 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:37:29,848 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [830955500] [2024-06-03 18:37:29,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:37:29,848 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:37:29,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:37:29,994 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:37:29,995 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:37:29,995 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [830955500] [2024-06-03 18:37:29,995 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [830955500] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:37:29,995 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:37:29,995 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 18:37:29,995 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [278777710] [2024-06-03 18:37:29,995 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:37:29,995 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 18:37:29,995 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:37:29,995 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 18:37:29,995 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-03 18:37:30,037 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 18:37:30,037 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 196 places, 221 transitions, 2383 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:37:30,037 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:37:30,038 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 18:37:30,038 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:37:30,388 INFO L124 PetriNetUnfolderBase]: 1486/2497 cut-off events. [2024-06-03 18:37:30,388 INFO L125 PetriNetUnfolderBase]: For 105906/105906 co-relation queries the response was YES. [2024-06-03 18:37:30,400 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15428 conditions, 2497 events. 1486/2497 cut-off events. For 105906/105906 co-relation queries the response was YES. Maximal size of possible extension queue 177. Compared 14306 event pairs, 342 based on Foata normal form. 8/2504 useless extension candidates. Maximal degree in co-relation 15332. Up to 2216 conditions per place. [2024-06-03 18:37:30,407 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 205 selfloop transitions, 27 changer transitions 0/238 dead transitions. [2024-06-03 18:37:30,407 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 201 places, 238 transitions, 2928 flow [2024-06-03 18:37:30,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 18:37:30,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 18:37:30,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 132 transitions. [2024-06-03 18:37:30,408 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5365853658536586 [2024-06-03 18:37:30,408 INFO L175 Difference]: Start difference. First operand has 196 places, 221 transitions, 2383 flow. Second operand 6 states and 132 transitions. [2024-06-03 18:37:30,408 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 201 places, 238 transitions, 2928 flow [2024-06-03 18:37:30,660 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 196 places, 238 transitions, 2806 flow, removed 17 selfloop flow, removed 5 redundant places. [2024-06-03 18:37:30,663 INFO L231 Difference]: Finished difference. Result has 197 places, 222 transitions, 2335 flow [2024-06-03 18:37:30,663 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2261, PETRI_DIFFERENCE_MINUEND_PLACES=191, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=221, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=194, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2335, PETRI_PLACES=197, PETRI_TRANSITIONS=222} [2024-06-03 18:37:30,663 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 155 predicate places. [2024-06-03 18:37:30,663 INFO L495 AbstractCegarLoop]: Abstraction has has 197 places, 222 transitions, 2335 flow [2024-06-03 18:37:30,663 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:37:30,663 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:37:30,663 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] [2024-06-03 18:37:30,664 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-03 18:37:30,664 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 18:37:30,664 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:37:30,664 INFO L85 PathProgramCache]: Analyzing trace with hash 1401647106, now seen corresponding path program 5 times [2024-06-03 18:37:30,664 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:37:30,664 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [305261048] [2024-06-03 18:37:30,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:37:30,664 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:37:30,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:37:30,794 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:37:30,795 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:37:30,795 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [305261048] [2024-06-03 18:37:30,795 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [305261048] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:37:30,795 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:37:30,795 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 18:37:30,795 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [765990853] [2024-06-03 18:37:30,795 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:37:30,795 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 18:37:30,795 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:37:30,795 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 18:37:30,796 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-03 18:37:30,829 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 18:37:30,830 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 197 places, 222 transitions, 2335 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:37:30,830 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:37:30,830 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 18:37:30,830 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:37:31,180 INFO L124 PetriNetUnfolderBase]: 1501/2529 cut-off events. [2024-06-03 18:37:31,180 INFO L125 PetriNetUnfolderBase]: For 107423/107431 co-relation queries the response was YES. [2024-06-03 18:37:31,192 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15516 conditions, 2529 events. 1501/2529 cut-off events. For 107423/107431 co-relation queries the response was YES. Maximal size of possible extension queue 180. Compared 14553 event pairs, 338 based on Foata normal form. 16/2545 useless extension candidates. Maximal degree in co-relation 15419. Up to 2209 conditions per place. [2024-06-03 18:37:31,201 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 211 selfloop transitions, 30 changer transitions 0/247 dead transitions. [2024-06-03 18:37:31,201 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 204 places, 247 transitions, 2920 flow [2024-06-03 18:37:31,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 18:37:31,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 18:37:31,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 171 transitions. [2024-06-03 18:37:31,202 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5213414634146342 [2024-06-03 18:37:31,202 INFO L175 Difference]: Start difference. First operand has 197 places, 222 transitions, 2335 flow. Second operand 8 states and 171 transitions. [2024-06-03 18:37:31,202 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 204 places, 247 transitions, 2920 flow [2024-06-03 18:37:31,491 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 200 places, 247 transitions, 2863 flow, removed 3 selfloop flow, removed 4 redundant places. [2024-06-03 18:37:31,494 INFO L231 Difference]: Finished difference. Result has 201 places, 223 transitions, 2363 flow [2024-06-03 18:37:31,494 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2278, PETRI_DIFFERENCE_MINUEND_PLACES=193, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=222, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=192, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2363, PETRI_PLACES=201, PETRI_TRANSITIONS=223} [2024-06-03 18:37:31,495 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 159 predicate places. [2024-06-03 18:37:31,495 INFO L495 AbstractCegarLoop]: Abstraction has has 201 places, 223 transitions, 2363 flow [2024-06-03 18:37:31,495 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:37:31,495 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:37:31,495 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] [2024-06-03 18:37:31,495 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-03 18:37:31,495 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 18:37:31,495 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:37:31,495 INFO L85 PathProgramCache]: Analyzing trace with hash 1401320676, now seen corresponding path program 6 times [2024-06-03 18:37:31,495 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:37:31,495 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2068489684] [2024-06-03 18:37:31,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:37:31,495 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:37:31,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:37:31,623 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:37:31,624 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:37:31,624 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2068489684] [2024-06-03 18:37:31,624 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2068489684] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:37:31,624 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:37:31,624 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 18:37:31,624 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1874815510] [2024-06-03 18:37:31,624 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:37:31,624 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 18:37:31,624 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:37:31,624 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 18:37:31,625 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-03 18:37:31,676 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 18:37:31,676 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 201 places, 223 transitions, 2363 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:37:31,676 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:37:31,676 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 18:37:31,676 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:37:32,094 INFO L124 PetriNetUnfolderBase]: 1488/2510 cut-off events. [2024-06-03 18:37:32,094 INFO L125 PetriNetUnfolderBase]: For 102625/102633 co-relation queries the response was YES. [2024-06-03 18:37:32,106 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15244 conditions, 2510 events. 1488/2510 cut-off events. For 102625/102633 co-relation queries the response was YES. Maximal size of possible extension queue 180. Compared 14420 event pairs, 246 based on Foata normal form. 14/2524 useless extension candidates. Maximal degree in co-relation 15146. Up to 2036 conditions per place. [2024-06-03 18:37:32,115 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 206 selfloop transitions, 41 changer transitions 0/253 dead transitions. [2024-06-03 18:37:32,115 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 208 places, 253 transitions, 2971 flow [2024-06-03 18:37:32,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 18:37:32,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 18:37:32,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 177 transitions. [2024-06-03 18:37:32,116 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5396341463414634 [2024-06-03 18:37:32,116 INFO L175 Difference]: Start difference. First operand has 201 places, 223 transitions, 2363 flow. Second operand 8 states and 177 transitions. [2024-06-03 18:37:32,116 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 208 places, 253 transitions, 2971 flow [2024-06-03 18:37:32,363 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 202 places, 253 transitions, 2903 flow, removed 7 selfloop flow, removed 6 redundant places. [2024-06-03 18:37:32,366 INFO L231 Difference]: Finished difference. Result has 203 places, 223 transitions, 2385 flow [2024-06-03 18:37:32,366 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2295, PETRI_DIFFERENCE_MINUEND_PLACES=195, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=223, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=182, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2385, PETRI_PLACES=203, PETRI_TRANSITIONS=223} [2024-06-03 18:37:32,367 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 161 predicate places. [2024-06-03 18:37:32,367 INFO L495 AbstractCegarLoop]: Abstraction has has 203 places, 223 transitions, 2385 flow [2024-06-03 18:37:32,367 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:37:32,367 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:37:32,367 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] [2024-06-03 18:37:32,367 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-03 18:37:32,367 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 18:37:32,367 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:37:32,367 INFO L85 PathProgramCache]: Analyzing trace with hash 378636038, now seen corresponding path program 4 times [2024-06-03 18:37:32,368 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:37:32,368 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1693620240] [2024-06-03 18:37:32,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:37:32,368 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:37:32,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:37:32,485 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:37:32,486 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:37:32,486 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1693620240] [2024-06-03 18:37:32,486 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1693620240] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:37:32,486 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:37:32,486 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 18:37:32,486 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1887716210] [2024-06-03 18:37:32,486 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:37:32,486 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 18:37:32,487 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:37:32,489 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 18:37:32,489 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-03 18:37:32,520 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 18:37:32,520 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 203 places, 223 transitions, 2385 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:37:32,520 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:37:32,521 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 18:37:32,521 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:37:32,818 INFO L124 PetriNetUnfolderBase]: 1501/2531 cut-off events. [2024-06-03 18:37:32,818 INFO L125 PetriNetUnfolderBase]: For 98758/98766 co-relation queries the response was YES. [2024-06-03 18:37:32,829 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15484 conditions, 2531 events. 1501/2531 cut-off events. For 98758/98766 co-relation queries the response was YES. Maximal size of possible extension queue 183. Compared 14606 event pairs, 364 based on Foata normal form. 9/2539 useless extension candidates. Maximal degree in co-relation 15385. Up to 2161 conditions per place. [2024-06-03 18:37:32,837 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 189 selfloop transitions, 55 changer transitions 0/250 dead transitions. [2024-06-03 18:37:32,837 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 208 places, 250 transitions, 3201 flow [2024-06-03 18:37:32,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 18:37:32,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 18:37:32,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 144 transitions. [2024-06-03 18:37:32,844 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5853658536585366 [2024-06-03 18:37:32,844 INFO L175 Difference]: Start difference. First operand has 203 places, 223 transitions, 2385 flow. Second operand 6 states and 144 transitions. [2024-06-03 18:37:32,844 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 208 places, 250 transitions, 3201 flow [2024-06-03 18:37:33,099 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 201 places, 250 transitions, 3105 flow, removed 9 selfloop flow, removed 7 redundant places. [2024-06-03 18:37:33,102 INFO L231 Difference]: Finished difference. Result has 202 places, 229 transitions, 2497 flow [2024-06-03 18:37:33,102 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2297, PETRI_DIFFERENCE_MINUEND_PLACES=196, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=223, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=174, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2497, PETRI_PLACES=202, PETRI_TRANSITIONS=229} [2024-06-03 18:37:33,103 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 160 predicate places. [2024-06-03 18:37:33,103 INFO L495 AbstractCegarLoop]: Abstraction has has 202 places, 229 transitions, 2497 flow [2024-06-03 18:37:33,103 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:37:33,103 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:37:33,103 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] [2024-06-03 18:37:33,103 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-03 18:37:33,103 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 18:37:33,103 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:37:33,103 INFO L85 PathProgramCache]: Analyzing trace with hash -853945054, now seen corresponding path program 4 times [2024-06-03 18:37:33,103 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:37:33,103 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1568599161] [2024-06-03 18:37:33,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:37:33,104 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:37:33,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:37:33,230 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:37:33,230 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:37:33,230 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1568599161] [2024-06-03 18:37:33,230 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1568599161] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:37:33,230 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:37:33,230 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 18:37:33,230 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [3743338] [2024-06-03 18:37:33,230 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:37:33,230 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 18:37:33,231 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:37:33,231 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 18:37:33,231 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-03 18:37:33,272 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 18:37:33,272 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 202 places, 229 transitions, 2497 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:37:33,272 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:37:33,272 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 18:37:33,272 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:37:33,627 INFO L124 PetriNetUnfolderBase]: 1498/2530 cut-off events. [2024-06-03 18:37:33,628 INFO L125 PetriNetUnfolderBase]: For 93917/93929 co-relation queries the response was YES. [2024-06-03 18:37:33,638 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15270 conditions, 2530 events. 1498/2530 cut-off events. For 93917/93929 co-relation queries the response was YES. Maximal size of possible extension queue 184. Compared 14677 event pairs, 352 based on Foata normal form. 13/2543 useless extension candidates. Maximal degree in co-relation 15171. Up to 2199 conditions per place. [2024-06-03 18:37:33,646 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 187 selfloop transitions, 54 changer transitions 0/247 dead transitions. [2024-06-03 18:37:33,647 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 208 places, 247 transitions, 3117 flow [2024-06-03 18:37:33,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 18:37:33,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 18:37:33,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 159 transitions. [2024-06-03 18:37:33,648 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.554006968641115 [2024-06-03 18:37:33,648 INFO L175 Difference]: Start difference. First operand has 202 places, 229 transitions, 2497 flow. Second operand 7 states and 159 transitions. [2024-06-03 18:37:33,648 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 208 places, 247 transitions, 3117 flow [2024-06-03 18:37:33,893 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 205 places, 247 transitions, 2947 flow, removed 34 selfloop flow, removed 3 redundant places. [2024-06-03 18:37:33,895 INFO L231 Difference]: Finished difference. Result has 206 places, 229 transitions, 2445 flow [2024-06-03 18:37:33,896 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2327, PETRI_DIFFERENCE_MINUEND_PLACES=199, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=229, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=175, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2445, PETRI_PLACES=206, PETRI_TRANSITIONS=229} [2024-06-03 18:37:33,896 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 164 predicate places. [2024-06-03 18:37:33,896 INFO L495 AbstractCegarLoop]: Abstraction has has 206 places, 229 transitions, 2445 flow [2024-06-03 18:37:33,896 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:37:33,896 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:37:33,896 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:37:33,897 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-03 18:37:33,897 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 18:37:33,897 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:37:33,897 INFO L85 PathProgramCache]: Analyzing trace with hash -853945240, now seen corresponding path program 5 times [2024-06-03 18:37:33,897 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:37:33,897 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1963913195] [2024-06-03 18:37:33,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:37:33,897 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:37:33,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:37:34,034 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:37:34,034 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:37:34,034 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1963913195] [2024-06-03 18:37:34,034 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1963913195] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:37:34,035 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:37:34,035 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 18:37:34,035 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1665002993] [2024-06-03 18:37:34,035 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:37:34,035 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 18:37:34,035 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:37:34,036 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 18:37:34,036 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-03 18:37:34,093 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 18:37:34,094 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 206 places, 229 transitions, 2445 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:37:34,094 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:37:34,094 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 18:37:34,094 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:37:34,415 INFO L124 PetriNetUnfolderBase]: 1495/2524 cut-off events. [2024-06-03 18:37:34,415 INFO L125 PetriNetUnfolderBase]: For 95992/96004 co-relation queries the response was YES. [2024-06-03 18:37:34,428 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15201 conditions, 2524 events. 1495/2524 cut-off events. For 95992/96004 co-relation queries the response was YES. Maximal size of possible extension queue 182. Compared 14574 event pairs, 352 based on Foata normal form. 13/2537 useless extension candidates. Maximal degree in co-relation 15101. Up to 2226 conditions per place. [2024-06-03 18:37:34,436 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 205 selfloop transitions, 34 changer transitions 0/245 dead transitions. [2024-06-03 18:37:34,436 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 211 places, 245 transitions, 2963 flow [2024-06-03 18:37:34,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 18:37:34,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 18:37:34,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 137 transitions. [2024-06-03 18:37:34,437 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.556910569105691 [2024-06-03 18:37:34,437 INFO L175 Difference]: Start difference. First operand has 206 places, 229 transitions, 2445 flow. Second operand 6 states and 137 transitions. [2024-06-03 18:37:34,437 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 211 places, 245 transitions, 2963 flow [2024-06-03 18:37:34,685 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 206 places, 245 transitions, 2860 flow, removed 6 selfloop flow, removed 5 redundant places. [2024-06-03 18:37:34,688 INFO L231 Difference]: Finished difference. Result has 207 places, 229 transitions, 2416 flow [2024-06-03 18:37:34,688 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2342, PETRI_DIFFERENCE_MINUEND_PLACES=201, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=229, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=195, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2416, PETRI_PLACES=207, PETRI_TRANSITIONS=229} [2024-06-03 18:37:34,688 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 165 predicate places. [2024-06-03 18:37:34,689 INFO L495 AbstractCegarLoop]: Abstraction has has 207 places, 229 transitions, 2416 flow [2024-06-03 18:37:34,689 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:37:34,689 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:37:34,689 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:37:34,689 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-06-03 18:37:34,689 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 18:37:34,689 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:37:34,689 INFO L85 PathProgramCache]: Analyzing trace with hash -848702830, now seen corresponding path program 6 times [2024-06-03 18:37:34,690 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:37:34,690 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [137062705] [2024-06-03 18:37:34,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:37:34,690 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:37:34,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:37:34,806 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:37:34,807 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:37:34,807 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [137062705] [2024-06-03 18:37:34,807 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [137062705] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:37:34,807 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:37:34,807 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 18:37:34,807 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1219861225] [2024-06-03 18:37:34,807 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:37:34,808 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 18:37:34,809 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:37:34,809 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 18:37:34,809 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-03 18:37:34,840 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 18:37:34,841 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 207 places, 229 transitions, 2416 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:37:34,841 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:37:34,841 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 18:37:34,841 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:37:35,236 INFO L124 PetriNetUnfolderBase]: 1500/2535 cut-off events. [2024-06-03 18:37:35,236 INFO L125 PetriNetUnfolderBase]: For 99756/99768 co-relation queries the response was YES. [2024-06-03 18:37:35,247 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15292 conditions, 2535 events. 1500/2535 cut-off events. For 99756/99768 co-relation queries the response was YES. Maximal size of possible extension queue 185. Compared 14684 event pairs, 352 based on Foata normal form. 13/2548 useless extension candidates. Maximal degree in co-relation 15191. Up to 2160 conditions per place. [2024-06-03 18:37:35,254 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 193 selfloop transitions, 62 changer transitions 0/261 dead transitions. [2024-06-03 18:37:35,255 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 214 places, 261 transitions, 3230 flow [2024-06-03 18:37:35,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 18:37:35,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 18:37:35,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 185 transitions. [2024-06-03 18:37:35,255 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5640243902439024 [2024-06-03 18:37:35,256 INFO L175 Difference]: Start difference. First operand has 207 places, 229 transitions, 2416 flow. Second operand 8 states and 185 transitions. [2024-06-03 18:37:35,256 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 214 places, 261 transitions, 3230 flow [2024-06-03 18:37:35,510 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 209 places, 261 transitions, 3154 flow, removed 0 selfloop flow, removed 5 redundant places. [2024-06-03 18:37:35,513 INFO L231 Difference]: Finished difference. Result has 210 places, 232 transitions, 2506 flow [2024-06-03 18:37:35,513 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2340, PETRI_DIFFERENCE_MINUEND_PLACES=202, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=229, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=170, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2506, PETRI_PLACES=210, PETRI_TRANSITIONS=232} [2024-06-03 18:37:35,513 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 168 predicate places. [2024-06-03 18:37:35,513 INFO L495 AbstractCegarLoop]: Abstraction has has 210 places, 232 transitions, 2506 flow [2024-06-03 18:37:35,513 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:37:35,513 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:37:35,514 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] [2024-06-03 18:37:35,514 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-06-03 18:37:35,514 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 18:37:35,514 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:37:35,514 INFO L85 PathProgramCache]: Analyzing trace with hash -848404300, now seen corresponding path program 7 times [2024-06-03 18:37:35,514 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:37:35,514 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1626207248] [2024-06-03 18:37:35,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:37:35,514 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:37:35,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:37:35,627 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:37:35,627 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:37:35,627 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1626207248] [2024-06-03 18:37:35,627 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1626207248] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:37:35,628 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:37:35,628 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 18:37:35,628 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [764574497] [2024-06-03 18:37:35,628 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:37:35,628 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 18:37:35,628 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:37:35,628 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 18:37:35,629 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-03 18:37:35,668 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 18:37:35,669 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 210 places, 232 transitions, 2506 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:37:35,669 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:37:35,669 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 18:37:35,669 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:37:36,015 INFO L124 PetriNetUnfolderBase]: 1505/2542 cut-off events. [2024-06-03 18:37:36,015 INFO L125 PetriNetUnfolderBase]: For 103644/103656 co-relation queries the response was YES. [2024-06-03 18:37:36,028 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15504 conditions, 2542 events. 1505/2542 cut-off events. For 103644/103656 co-relation queries the response was YES. Maximal size of possible extension queue 186. Compared 14740 event pairs, 352 based on Foata normal form. 13/2555 useless extension candidates. Maximal degree in co-relation 15402. Up to 2166 conditions per place. [2024-06-03 18:37:36,037 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 187 selfloop transitions, 68 changer transitions 0/261 dead transitions. [2024-06-03 18:37:36,037 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 218 places, 261 transitions, 3222 flow [2024-06-03 18:37:36,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 18:37:36,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 18:37:36,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 198 transitions. [2024-06-03 18:37:36,038 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5365853658536586 [2024-06-03 18:37:36,038 INFO L175 Difference]: Start difference. First operand has 210 places, 232 transitions, 2506 flow. Second operand 9 states and 198 transitions. [2024-06-03 18:37:36,038 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 218 places, 261 transitions, 3222 flow [2024-06-03 18:37:36,289 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 212 places, 261 transitions, 3034 flow, removed 20 selfloop flow, removed 6 redundant places. [2024-06-03 18:37:36,291 INFO L231 Difference]: Finished difference. Result has 213 places, 235 transitions, 2502 flow [2024-06-03 18:37:36,292 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2332, PETRI_DIFFERENCE_MINUEND_PLACES=204, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=232, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=167, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2502, PETRI_PLACES=213, PETRI_TRANSITIONS=235} [2024-06-03 18:37:36,292 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 171 predicate places. [2024-06-03 18:37:36,292 INFO L495 AbstractCegarLoop]: Abstraction has has 213 places, 235 transitions, 2502 flow [2024-06-03 18:37:36,292 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:37:36,292 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:37:36,293 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] [2024-06-03 18:37:36,293 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-06-03 18:37:36,293 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 18:37:36,293 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:37:36,293 INFO L85 PathProgramCache]: Analyzing trace with hash -848403928, now seen corresponding path program 1 times [2024-06-03 18:37:36,293 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:37:36,293 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1001748039] [2024-06-03 18:37:36,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:37:36,293 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:37:36,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:37:36,417 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:37:36,417 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:37:36,417 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1001748039] [2024-06-03 18:37:36,417 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1001748039] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:37:36,417 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:37:36,417 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 18:37:36,418 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [109762638] [2024-06-03 18:37:36,418 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:37:36,418 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 18:37:36,418 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:37:36,418 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 18:37:36,418 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-03 18:37:36,473 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 18:37:36,473 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 213 places, 235 transitions, 2502 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:37:36,473 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:37:36,473 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 18:37:36,473 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:37:36,855 INFO L124 PetriNetUnfolderBase]: 1518/2562 cut-off events. [2024-06-03 18:37:36,855 INFO L125 PetriNetUnfolderBase]: For 108506/108518 co-relation queries the response was YES. [2024-06-03 18:37:36,867 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15726 conditions, 2562 events. 1518/2562 cut-off events. For 108506/108518 co-relation queries the response was YES. Maximal size of possible extension queue 190. Compared 14862 event pairs, 351 based on Foata normal form. 13/2575 useless extension candidates. Maximal degree in co-relation 15623. Up to 2224 conditions per place. [2024-06-03 18:37:36,876 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 198 selfloop transitions, 53 changer transitions 0/257 dead transitions. [2024-06-03 18:37:36,876 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 220 places, 257 transitions, 3240 flow [2024-06-03 18:37:36,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 18:37:36,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 18:37:36,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 173 transitions. [2024-06-03 18:37:36,877 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5274390243902439 [2024-06-03 18:37:36,877 INFO L175 Difference]: Start difference. First operand has 213 places, 235 transitions, 2502 flow. Second operand 8 states and 173 transitions. [2024-06-03 18:37:36,877 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 220 places, 257 transitions, 3240 flow [2024-06-03 18:37:37,202 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 214 places, 257 transitions, 3112 flow, removed 8 selfloop flow, removed 6 redundant places. [2024-06-03 18:37:37,205 INFO L231 Difference]: Finished difference. Result has 215 places, 241 transitions, 2592 flow [2024-06-03 18:37:37,205 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2374, PETRI_DIFFERENCE_MINUEND_PLACES=207, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=235, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=185, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2592, PETRI_PLACES=215, PETRI_TRANSITIONS=241} [2024-06-03 18:37:37,206 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 173 predicate places. [2024-06-03 18:37:37,206 INFO L495 AbstractCegarLoop]: Abstraction has has 215 places, 241 transitions, 2592 flow [2024-06-03 18:37:37,206 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:37:37,206 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:37:37,206 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:37:37,206 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-06-03 18:37:37,206 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 18:37:37,206 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:37:37,207 INFO L85 PathProgramCache]: Analyzing trace with hash 500378792, now seen corresponding path program 2 times [2024-06-03 18:37:37,207 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:37:37,207 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [241971609] [2024-06-03 18:37:37,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:37:37,207 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:37:37,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:37:37,343 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:37:37,344 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:37:37,344 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [241971609] [2024-06-03 18:37:37,344 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [241971609] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:37:37,344 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:37:37,344 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 18:37:37,344 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1308412960] [2024-06-03 18:37:37,345 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:37:37,345 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 18:37:37,345 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:37:37,345 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 18:37:37,345 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-03 18:37:37,404 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 18:37:37,405 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 215 places, 241 transitions, 2592 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:37:37,405 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:37:37,405 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 18:37:37,405 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:37:37,783 INFO L124 PetriNetUnfolderBase]: 1547/2607 cut-off events. [2024-06-03 18:37:37,783 INFO L125 PetriNetUnfolderBase]: For 115029/115041 co-relation queries the response was YES. [2024-06-03 18:37:37,796 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16371 conditions, 2607 events. 1547/2607 cut-off events. For 115029/115041 co-relation queries the response was YES. Maximal size of possible extension queue 195. Compared 15136 event pairs, 351 based on Foata normal form. 13/2620 useless extension candidates. Maximal degree in co-relation 16267. Up to 2285 conditions per place. [2024-06-03 18:37:37,805 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 215 selfloop transitions, 46 changer transitions 0/267 dead transitions. [2024-06-03 18:37:37,805 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 220 places, 267 transitions, 3444 flow [2024-06-03 18:37:37,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 18:37:37,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 18:37:37,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 138 transitions. [2024-06-03 18:37:37,806 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5609756097560976 [2024-06-03 18:37:37,806 INFO L175 Difference]: Start difference. First operand has 215 places, 241 transitions, 2592 flow. Second operand 6 states and 138 transitions. [2024-06-03 18:37:37,806 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 220 places, 267 transitions, 3444 flow [2024-06-03 18:37:38,091 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 215 places, 267 transitions, 3301 flow, removed 42 selfloop flow, removed 5 redundant places. [2024-06-03 18:37:38,094 INFO L231 Difference]: Finished difference. Result has 217 places, 253 transitions, 2786 flow [2024-06-03 18:37:38,094 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2486, PETRI_DIFFERENCE_MINUEND_PLACES=210, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=241, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=198, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2786, PETRI_PLACES=217, PETRI_TRANSITIONS=253} [2024-06-03 18:37:38,095 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 175 predicate places. [2024-06-03 18:37:38,095 INFO L495 AbstractCegarLoop]: Abstraction has has 217 places, 253 transitions, 2786 flow [2024-06-03 18:37:38,095 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:37:38,095 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:37:38,095 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] [2024-06-03 18:37:38,095 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-06-03 18:37:38,095 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 18:37:38,095 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:37:38,095 INFO L85 PathProgramCache]: Analyzing trace with hash 500373026, now seen corresponding path program 5 times [2024-06-03 18:37:38,095 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:37:38,096 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1127639092] [2024-06-03 18:37:38,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:37:38,096 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:37:38,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:37:38,234 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:37:38,234 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:37:38,234 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1127639092] [2024-06-03 18:37:38,234 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1127639092] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:37:38,234 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:37:38,234 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 18:37:38,234 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1725516187] [2024-06-03 18:37:38,234 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:37:38,234 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 18:37:38,234 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:37:38,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 18:37:38,235 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-03 18:37:38,291 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 18:37:38,291 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 217 places, 253 transitions, 2786 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:37:38,291 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:37:38,291 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 18:37:38,291 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:37:38,623 INFO L124 PetriNetUnfolderBase]: 1552/2616 cut-off events. [2024-06-03 18:37:38,623 INFO L125 PetriNetUnfolderBase]: For 115238/115252 co-relation queries the response was YES. [2024-06-03 18:37:38,636 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16507 conditions, 2616 events. 1552/2616 cut-off events. For 115238/115252 co-relation queries the response was YES. Maximal size of possible extension queue 197. Compared 15198 event pairs, 351 based on Foata normal form. 15/2631 useless extension candidates. Maximal degree in co-relation 16401. Up to 2274 conditions per place. [2024-06-03 18:37:38,644 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 210 selfloop transitions, 57 changer transitions 0/273 dead transitions. [2024-06-03 18:37:38,645 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 222 places, 273 transitions, 3512 flow [2024-06-03 18:37:38,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 18:37:38,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 18:37:38,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 141 transitions. [2024-06-03 18:37:38,645 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.573170731707317 [2024-06-03 18:37:38,645 INFO L175 Difference]: Start difference. First operand has 217 places, 253 transitions, 2786 flow. Second operand 6 states and 141 transitions. [2024-06-03 18:37:38,645 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 222 places, 273 transitions, 3512 flow [2024-06-03 18:37:38,922 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 219 places, 273 transitions, 3451 flow, removed 15 selfloop flow, removed 3 redundant places. [2024-06-03 18:37:38,925 INFO L231 Difference]: Finished difference. Result has 220 places, 256 transitions, 2905 flow [2024-06-03 18:37:38,926 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2727, PETRI_DIFFERENCE_MINUEND_PLACES=214, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=253, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=199, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2905, PETRI_PLACES=220, PETRI_TRANSITIONS=256} [2024-06-03 18:37:38,926 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 178 predicate places. [2024-06-03 18:37:38,926 INFO L495 AbstractCegarLoop]: Abstraction has has 220 places, 256 transitions, 2905 flow [2024-06-03 18:37:38,926 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:37:38,926 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:37:38,926 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] [2024-06-03 18:37:38,926 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2024-06-03 18:37:38,926 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 18:37:38,926 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:37:38,926 INFO L85 PathProgramCache]: Analyzing trace with hash 500372840, now seen corresponding path program 8 times [2024-06-03 18:37:38,927 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:37:38,927 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [546495119] [2024-06-03 18:37:38,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:37:38,927 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:37:38,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:37:39,070 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:37:39,070 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:37:39,070 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [546495119] [2024-06-03 18:37:39,071 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [546495119] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:37:39,071 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:37:39,071 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 18:37:39,071 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [123534195] [2024-06-03 18:37:39,071 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:37:39,071 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 18:37:39,071 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:37:39,071 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 18:37:39,072 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-03 18:37:39,131 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 18:37:39,131 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 220 places, 256 transitions, 2905 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:37:39,131 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:37:39,131 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 18:37:39,131 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:37:39,493 INFO L124 PetriNetUnfolderBase]: 1549/2612 cut-off events. [2024-06-03 18:37:39,494 INFO L125 PetriNetUnfolderBase]: For 114104/114118 co-relation queries the response was YES. [2024-06-03 18:37:39,508 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16563 conditions, 2612 events. 1549/2612 cut-off events. For 114104/114118 co-relation queries the response was YES. Maximal size of possible extension queue 197. Compared 15151 event pairs, 351 based on Foata normal form. 15/2627 useless extension candidates. Maximal degree in co-relation 16456. Up to 2234 conditions per place. [2024-06-03 18:37:39,518 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 217 selfloop transitions, 60 changer transitions 0/283 dead transitions. [2024-06-03 18:37:39,518 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 226 places, 283 transitions, 3631 flow [2024-06-03 18:37:39,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 18:37:39,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 18:37:39,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 167 transitions. [2024-06-03 18:37:39,519 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5818815331010453 [2024-06-03 18:37:39,519 INFO L175 Difference]: Start difference. First operand has 220 places, 256 transitions, 2905 flow. Second operand 7 states and 167 transitions. [2024-06-03 18:37:39,519 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 226 places, 283 transitions, 3631 flow [2024-06-03 18:37:39,885 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 221 places, 283 transitions, 3501 flow, removed 22 selfloop flow, removed 5 redundant places. [2024-06-03 18:37:39,888 INFO L231 Difference]: Finished difference. Result has 222 places, 256 transitions, 2913 flow [2024-06-03 18:37:39,889 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2779, PETRI_DIFFERENCE_MINUEND_PLACES=215, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=256, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=196, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2913, PETRI_PLACES=222, PETRI_TRANSITIONS=256} [2024-06-03 18:37:39,889 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 180 predicate places. [2024-06-03 18:37:39,889 INFO L495 AbstractCegarLoop]: Abstraction has has 222 places, 256 transitions, 2913 flow [2024-06-03 18:37:39,889 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:37:39,889 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:37:39,889 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] [2024-06-03 18:37:39,889 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2024-06-03 18:37:39,889 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 18:37:39,890 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:37:39,890 INFO L85 PathProgramCache]: Analyzing trace with hash 500378420, now seen corresponding path program 9 times [2024-06-03 18:37:39,890 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:37:39,890 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [270960354] [2024-06-03 18:37:39,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:37:39,890 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:37:39,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:37:40,038 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:37:40,039 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:37:40,039 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [270960354] [2024-06-03 18:37:40,039 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [270960354] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:37:40,039 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:37:40,039 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 18:37:40,039 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [503683603] [2024-06-03 18:37:40,039 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:37:40,039 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 18:37:40,039 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:37:40,039 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 18:37:40,039 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-03 18:37:40,083 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 18:37:40,084 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 222 places, 256 transitions, 2913 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:37:40,084 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:37:40,084 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 18:37:40,084 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:37:40,449 INFO L124 PetriNetUnfolderBase]: 1546/2608 cut-off events. [2024-06-03 18:37:40,449 INFO L125 PetriNetUnfolderBase]: For 109335/109349 co-relation queries the response was YES. [2024-06-03 18:37:40,463 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16440 conditions, 2608 events. 1546/2608 cut-off events. For 109335/109349 co-relation queries the response was YES. Maximal size of possible extension queue 197. Compared 15161 event pairs, 351 based on Foata normal form. 15/2623 useless extension candidates. Maximal degree in co-relation 16334. Up to 2231 conditions per place. [2024-06-03 18:37:40,472 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 212 selfloop transitions, 60 changer transitions 0/278 dead transitions. [2024-06-03 18:37:40,472 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 227 places, 278 transitions, 3513 flow [2024-06-03 18:37:40,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 18:37:40,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 18:37:40,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 146 transitions. [2024-06-03 18:37:40,473 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5934959349593496 [2024-06-03 18:37:40,473 INFO L175 Difference]: Start difference. First operand has 222 places, 256 transitions, 2913 flow. Second operand 6 states and 146 transitions. [2024-06-03 18:37:40,473 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 227 places, 278 transitions, 3513 flow [2024-06-03 18:37:40,769 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 218 places, 278 transitions, 3343 flow, removed 8 selfloop flow, removed 9 redundant places. [2024-06-03 18:37:40,772 INFO L231 Difference]: Finished difference. Result has 219 places, 256 transitions, 2875 flow [2024-06-03 18:37:40,772 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2743, PETRI_DIFFERENCE_MINUEND_PLACES=213, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=256, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=196, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2875, PETRI_PLACES=219, PETRI_TRANSITIONS=256} [2024-06-03 18:37:40,772 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 177 predicate places. [2024-06-03 18:37:40,773 INFO L495 AbstractCegarLoop]: Abstraction has has 219 places, 256 transitions, 2875 flow [2024-06-03 18:37:40,773 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:37:40,773 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:37:40,773 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] [2024-06-03 18:37:40,773 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2024-06-03 18:37:40,773 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 18:37:40,773 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:37:40,773 INFO L85 PathProgramCache]: Analyzing trace with hash 500384372, now seen corresponding path program 3 times [2024-06-03 18:37:40,773 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:37:40,773 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1783653334] [2024-06-03 18:37:40,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:37:40,774 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:37:40,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:37:40,900 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:37:40,901 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:37:40,901 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1783653334] [2024-06-03 18:37:40,901 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1783653334] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:37:40,901 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:37:40,901 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 18:37:40,901 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1536002199] [2024-06-03 18:37:40,901 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:37:40,901 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 18:37:40,901 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:37:40,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 18:37:40,901 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-03 18:37:40,948 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 18:37:40,949 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 219 places, 256 transitions, 2875 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:37:40,949 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:37:40,949 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 18:37:40,949 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:37:41,321 INFO L124 PetriNetUnfolderBase]: 1543/2604 cut-off events. [2024-06-03 18:37:41,321 INFO L125 PetriNetUnfolderBase]: For 104319/104333 co-relation queries the response was YES. [2024-06-03 18:37:41,333 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16247 conditions, 2604 events. 1543/2604 cut-off events. For 104319/104333 co-relation queries the response was YES. Maximal size of possible extension queue 197. Compared 15127 event pairs, 351 based on Foata normal form. 15/2619 useless extension candidates. Maximal degree in co-relation 16142. Up to 2281 conditions per place. [2024-06-03 18:37:41,341 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 218 selfloop transitions, 46 changer transitions 0/270 dead transitions. [2024-06-03 18:37:41,341 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 225 places, 270 transitions, 3437 flow [2024-06-03 18:37:41,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 18:37:41,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 18:37:41,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 154 transitions. [2024-06-03 18:37:41,342 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5365853658536586 [2024-06-03 18:37:41,342 INFO L175 Difference]: Start difference. First operand has 219 places, 256 transitions, 2875 flow. Second operand 7 states and 154 transitions. [2024-06-03 18:37:41,342 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 225 places, 270 transitions, 3437 flow [2024-06-03 18:37:41,586 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 219 places, 270 transitions, 3290 flow, removed 11 selfloop flow, removed 6 redundant places. [2024-06-03 18:37:41,589 INFO L231 Difference]: Finished difference. Result has 220 places, 256 transitions, 2830 flow [2024-06-03 18:37:41,590 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2728, PETRI_DIFFERENCE_MINUEND_PLACES=213, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=256, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=210, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2830, PETRI_PLACES=220, PETRI_TRANSITIONS=256} [2024-06-03 18:37:41,590 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 178 predicate places. [2024-06-03 18:37:41,590 INFO L495 AbstractCegarLoop]: Abstraction has has 220 places, 256 transitions, 2830 flow [2024-06-03 18:37:41,590 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:37:41,590 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:37:41,590 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] [2024-06-03 18:37:41,590 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2024-06-03 18:37:41,590 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 18:37:41,591 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:37:41,591 INFO L85 PathProgramCache]: Analyzing trace with hash 500384186, now seen corresponding path program 6 times [2024-06-03 18:37:41,591 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:37:41,591 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [181977188] [2024-06-03 18:37:41,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:37:41,591 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:37:41,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:37:41,706 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:37:41,706 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:37:41,706 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [181977188] [2024-06-03 18:37:41,706 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [181977188] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:37:41,707 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:37:41,707 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 18:37:41,707 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1809034532] [2024-06-03 18:37:41,707 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:37:41,707 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 18:37:41,707 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:37:41,707 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 18:37:41,708 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-03 18:37:41,748 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 18:37:41,748 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 220 places, 256 transitions, 2830 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:37:41,748 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:37:41,748 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 18:37:41,749 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:37:42,085 INFO L124 PetriNetUnfolderBase]: 1540/2600 cut-off events. [2024-06-03 18:37:42,085 INFO L125 PetriNetUnfolderBase]: For 102651/102665 co-relation queries the response was YES. [2024-06-03 18:37:42,099 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16096 conditions, 2600 events. 1540/2600 cut-off events. For 102651/102665 co-relation queries the response was YES. Maximal size of possible extension queue 197. Compared 15106 event pairs, 351 based on Foata normal form. 15/2615 useless extension candidates. Maximal degree in co-relation 15991. Up to 2259 conditions per place. [2024-06-03 18:37:42,108 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 210 selfloop transitions, 57 changer transitions 0/273 dead transitions. [2024-06-03 18:37:42,108 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 226 places, 273 transitions, 3406 flow [2024-06-03 18:37:42,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 18:37:42,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 18:37:42,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 157 transitions. [2024-06-03 18:37:42,109 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5470383275261324 [2024-06-03 18:37:42,109 INFO L175 Difference]: Start difference. First operand has 220 places, 256 transitions, 2830 flow. Second operand 7 states and 157 transitions. [2024-06-03 18:37:42,109 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 226 places, 273 transitions, 3406 flow [2024-06-03 18:37:42,390 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 220 places, 273 transitions, 3280 flow, removed 15 selfloop flow, removed 6 redundant places. [2024-06-03 18:37:42,393 INFO L231 Difference]: Finished difference. Result has 221 places, 256 transitions, 2828 flow [2024-06-03 18:37:42,393 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2704, PETRI_DIFFERENCE_MINUEND_PLACES=214, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=256, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=199, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2828, PETRI_PLACES=221, PETRI_TRANSITIONS=256} [2024-06-03 18:37:42,393 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 179 predicate places. [2024-06-03 18:37:42,393 INFO L495 AbstractCegarLoop]: Abstraction has has 221 places, 256 transitions, 2828 flow [2024-06-03 18:37:42,394 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:37:42,394 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:37:42,394 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] [2024-06-03 18:37:42,394 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2024-06-03 18:37:42,394 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 18:37:42,394 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:37:42,394 INFO L85 PathProgramCache]: Analyzing trace with hash 1401650082, now seen corresponding path program 7 times [2024-06-03 18:37:42,395 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:37:42,395 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [787171696] [2024-06-03 18:37:42,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:37:42,395 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:37:42,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:37:42,515 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:37:42,515 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:37:42,515 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [787171696] [2024-06-03 18:37:42,516 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [787171696] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:37:42,516 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:37:42,516 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 18:37:42,516 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [998094811] [2024-06-03 18:37:42,516 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:37:42,517 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 18:37:42,517 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:37:42,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 18:37:42,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-03 18:37:42,557 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 18:37:42,558 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 221 places, 256 transitions, 2828 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:37:42,558 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:37:42,558 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 18:37:42,558 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:37:42,897 INFO L124 PetriNetUnfolderBase]: 1553/2620 cut-off events. [2024-06-03 18:37:42,898 INFO L125 PetriNetUnfolderBase]: For 104108/104122 co-relation queries the response was YES. [2024-06-03 18:37:42,912 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16260 conditions, 2620 events. 1553/2620 cut-off events. For 104108/104122 co-relation queries the response was YES. Maximal size of possible extension queue 200. Compared 15216 event pairs, 351 based on Foata normal form. 15/2635 useless extension candidates. Maximal degree in co-relation 16155. Up to 2239 conditions per place. [2024-06-03 18:37:42,922 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 194 selfloop transitions, 82 changer transitions 0/282 dead transitions. [2024-06-03 18:37:42,923 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 228 places, 282 transitions, 3706 flow [2024-06-03 18:37:42,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 18:37:42,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 18:37:42,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 176 transitions. [2024-06-03 18:37:42,924 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5365853658536586 [2024-06-03 18:37:42,924 INFO L175 Difference]: Start difference. First operand has 221 places, 256 transitions, 2828 flow. Second operand 8 states and 176 transitions. [2024-06-03 18:37:42,924 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 228 places, 282 transitions, 3706 flow [2024-06-03 18:37:43,269 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 220 places, 282 transitions, 3538 flow, removed 3 selfloop flow, removed 8 redundant places. [2024-06-03 18:37:43,272 INFO L231 Difference]: Finished difference. Result has 221 places, 262 transitions, 2916 flow [2024-06-03 18:37:43,273 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2664, PETRI_DIFFERENCE_MINUEND_PLACES=213, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=256, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=180, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2916, PETRI_PLACES=221, PETRI_TRANSITIONS=262} [2024-06-03 18:37:43,273 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 179 predicate places. [2024-06-03 18:37:43,273 INFO L495 AbstractCegarLoop]: Abstraction has has 221 places, 262 transitions, 2916 flow [2024-06-03 18:37:43,273 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:37:43,273 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:37:43,274 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] [2024-06-03 18:37:43,274 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2024-06-03 18:37:43,274 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 18:37:43,274 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:37:43,274 INFO L85 PathProgramCache]: Analyzing trace with hash 1401412932, now seen corresponding path program 8 times [2024-06-03 18:37:43,274 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:37:43,274 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1186461854] [2024-06-03 18:37:43,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:37:43,275 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:37:43,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:37:43,394 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:37:43,394 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:37:43,394 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1186461854] [2024-06-03 18:37:43,394 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1186461854] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:37:43,394 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:37:43,394 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 18:37:43,394 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1285887716] [2024-06-03 18:37:43,394 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:37:43,395 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 18:37:43,395 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:37:43,395 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 18:37:43,395 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-03 18:37:43,438 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 18:37:43,438 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 221 places, 262 transitions, 2916 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:37:43,438 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:37:43,438 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 18:37:43,438 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:37:43,781 INFO L124 PetriNetUnfolderBase]: 1550/2616 cut-off events. [2024-06-03 18:37:43,782 INFO L125 PetriNetUnfolderBase]: For 102730/102744 co-relation queries the response was YES. [2024-06-03 18:37:43,795 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16220 conditions, 2616 events. 1550/2616 cut-off events. For 102730/102744 co-relation queries the response was YES. Maximal size of possible extension queue 200. Compared 15238 event pairs, 351 based on Foata normal form. 15/2631 useless extension candidates. Maximal degree in co-relation 16115. Up to 2236 conditions per place. [2024-06-03 18:37:43,804 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 193 selfloop transitions, 86 changer transitions 0/285 dead transitions. [2024-06-03 18:37:43,805 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 229 places, 285 transitions, 3630 flow [2024-06-03 18:37:43,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 18:37:43,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 18:37:43,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 195 transitions. [2024-06-03 18:37:43,805 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5284552845528455 [2024-06-03 18:37:43,805 INFO L175 Difference]: Start difference. First operand has 221 places, 262 transitions, 2916 flow. Second operand 9 states and 195 transitions. [2024-06-03 18:37:43,806 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 229 places, 285 transitions, 3630 flow [2024-06-03 18:37:44,094 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 224 places, 285 transitions, 3456 flow, removed 26 selfloop flow, removed 5 redundant places. [2024-06-03 18:37:44,098 INFO L231 Difference]: Finished difference. Result has 225 places, 262 transitions, 2930 flow [2024-06-03 18:37:44,098 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2744, PETRI_DIFFERENCE_MINUEND_PLACES=216, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=262, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=86, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=176, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2930, PETRI_PLACES=225, PETRI_TRANSITIONS=262} [2024-06-03 18:37:44,098 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 183 predicate places. [2024-06-03 18:37:44,098 INFO L495 AbstractCegarLoop]: Abstraction has has 225 places, 262 transitions, 2930 flow [2024-06-03 18:37:44,099 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:37:44,099 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:37:44,099 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:37:44,099 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2024-06-03 18:37:44,099 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 18:37:44,099 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:37:44,099 INFO L85 PathProgramCache]: Analyzing trace with hash 1412374842, now seen corresponding path program 9 times [2024-06-03 18:37:44,099 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:37:44,099 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2043406934] [2024-06-03 18:37:44,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:37:44,100 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:37:44,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:37:44,221 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:37:44,221 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:37:44,221 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2043406934] [2024-06-03 18:37:44,221 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2043406934] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:37:44,221 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:37:44,221 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 18:37:44,222 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [859016096] [2024-06-03 18:37:44,222 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:37:44,222 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 18:37:44,222 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:37:44,222 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 18:37:44,222 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-03 18:37:44,250 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 18:37:44,250 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 225 places, 262 transitions, 2930 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:37:44,250 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:37:44,250 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 18:37:44,250 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:37:44,571 INFO L124 PetriNetUnfolderBase]: 1547/2610 cut-off events. [2024-06-03 18:37:44,571 INFO L125 PetriNetUnfolderBase]: For 101625/101631 co-relation queries the response was YES. [2024-06-03 18:37:44,585 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16139 conditions, 2610 events. 1547/2610 cut-off events. For 101625/101631 co-relation queries the response was YES. Maximal size of possible extension queue 200. Compared 15195 event pairs, 373 based on Foata normal form. 7/2616 useless extension candidates. Maximal degree in co-relation 16034. Up to 2233 conditions per place. [2024-06-03 18:37:44,593 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 189 selfloop transitions, 77 changer transitions 0/272 dead transitions. [2024-06-03 18:37:44,593 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 230 places, 272 transitions, 3486 flow [2024-06-03 18:37:44,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 18:37:44,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 18:37:44,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 133 transitions. [2024-06-03 18:37:44,594 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.540650406504065 [2024-06-03 18:37:44,594 INFO L175 Difference]: Start difference. First operand has 225 places, 262 transitions, 2930 flow. Second operand 6 states and 133 transitions. [2024-06-03 18:37:44,594 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 230 places, 272 transitions, 3486 flow [2024-06-03 18:37:44,903 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 221 places, 272 transitions, 3274 flow, removed 14 selfloop flow, removed 9 redundant places. [2024-06-03 18:37:44,906 INFO L231 Difference]: Finished difference. Result has 222 places, 262 transitions, 2878 flow [2024-06-03 18:37:44,906 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2718, PETRI_DIFFERENCE_MINUEND_PLACES=216, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=262, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=77, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=185, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2878, PETRI_PLACES=222, PETRI_TRANSITIONS=262} [2024-06-03 18:37:44,906 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 180 predicate places. [2024-06-03 18:37:44,906 INFO L495 AbstractCegarLoop]: Abstraction has has 222 places, 262 transitions, 2878 flow [2024-06-03 18:37:44,907 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:37:44,907 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:37:44,907 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:37:44,907 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2024-06-03 18:37:44,907 INFO L420 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 18:37:44,907 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:37:44,907 INFO L85 PathProgramCache]: Analyzing trace with hash 1401412746, now seen corresponding path program 10 times [2024-06-03 18:37:44,907 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:37:44,907 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1978292770] [2024-06-03 18:37:44,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:37:44,907 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:37:44,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:37:45,032 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:37:45,032 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:37:45,032 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1978292770] [2024-06-03 18:37:45,032 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1978292770] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:37:45,032 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:37:45,033 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 18:37:45,033 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1968687136] [2024-06-03 18:37:45,033 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:37:45,033 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 18:37:45,033 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:37:45,033 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 18:37:45,033 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-03 18:37:45,065 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 18:37:45,066 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 222 places, 262 transitions, 2878 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:37:45,066 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:37:45,066 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 18:37:45,066 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:37:45,439 INFO L124 PetriNetUnfolderBase]: 1544/2608 cut-off events. [2024-06-03 18:37:45,439 INFO L125 PetriNetUnfolderBase]: For 96488/96502 co-relation queries the response was YES. [2024-06-03 18:37:45,452 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15933 conditions, 2608 events. 1544/2608 cut-off events. For 96488/96502 co-relation queries the response was YES. Maximal size of possible extension queue 200. Compared 15166 event pairs, 351 based on Foata normal form. 15/2623 useless extension candidates. Maximal degree in co-relation 15829. Up to 2193 conditions per place. [2024-06-03 18:37:45,461 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 203 selfloop transitions, 83 changer transitions 0/292 dead transitions. [2024-06-03 18:37:45,461 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 229 places, 292 transitions, 3526 flow [2024-06-03 18:37:45,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 18:37:45,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 18:37:45,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 187 transitions. [2024-06-03 18:37:45,462 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5701219512195121 [2024-06-03 18:37:45,462 INFO L175 Difference]: Start difference. First operand has 222 places, 262 transitions, 2878 flow. Second operand 8 states and 187 transitions. [2024-06-03 18:37:45,462 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 229 places, 292 transitions, 3526 flow [2024-06-03 18:37:45,728 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 223 places, 292 transitions, 3342 flow, removed 6 selfloop flow, removed 6 redundant places. [2024-06-03 18:37:45,731 INFO L231 Difference]: Finished difference. Result has 224 places, 262 transitions, 2878 flow [2024-06-03 18:37:45,732 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2694, PETRI_DIFFERENCE_MINUEND_PLACES=216, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=262, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=83, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=179, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2878, PETRI_PLACES=224, PETRI_TRANSITIONS=262} [2024-06-03 18:37:45,732 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 182 predicate places. [2024-06-03 18:37:45,732 INFO L495 AbstractCegarLoop]: Abstraction has has 224 places, 262 transitions, 2878 flow [2024-06-03 18:37:45,732 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:37:45,732 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:37:45,732 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] [2024-06-03 18:37:45,732 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2024-06-03 18:37:45,732 INFO L420 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 18:37:45,732 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:37:45,732 INFO L85 PathProgramCache]: Analyzing trace with hash 1412771580, now seen corresponding path program 1 times [2024-06-03 18:37:45,733 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:37:45,733 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1765321397] [2024-06-03 18:37:45,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:37:45,733 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:37:45,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:37:45,878 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:37:45,878 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:37:45,878 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1765321397] [2024-06-03 18:37:45,879 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1765321397] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:37:45,879 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:37:45,879 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 18:37:45,879 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1995831009] [2024-06-03 18:37:45,879 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:37:45,880 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 18:37:45,880 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:37:45,880 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 18:37:45,880 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-03 18:37:45,928 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 18:37:45,928 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 224 places, 262 transitions, 2878 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:37:45,928 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:37:45,928 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 18:37:45,928 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:37:46,292 INFO L124 PetriNetUnfolderBase]: 1564/2635 cut-off events. [2024-06-03 18:37:46,292 INFO L125 PetriNetUnfolderBase]: For 106505/106505 co-relation queries the response was YES. [2024-06-03 18:37:46,306 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16206 conditions, 2635 events. 1564/2635 cut-off events. For 106505/106505 co-relation queries the response was YES. Maximal size of possible extension queue 202. Compared 15272 event pairs, 335 based on Foata normal form. 6/2640 useless extension candidates. Maximal degree in co-relation 16101. Up to 2234 conditions per place. [2024-06-03 18:37:46,316 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 247 selfloop transitions, 32 changer transitions 0/285 dead transitions. [2024-06-03 18:37:46,316 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 229 places, 285 transitions, 3558 flow [2024-06-03 18:37:46,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 18:37:46,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 18:37:46,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 135 transitions. [2024-06-03 18:37:46,317 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5487804878048781 [2024-06-03 18:37:46,317 INFO L175 Difference]: Start difference. First operand has 224 places, 262 transitions, 2878 flow. Second operand 6 states and 135 transitions. [2024-06-03 18:37:46,317 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 229 places, 285 transitions, 3558 flow [2024-06-03 18:37:46,588 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 221 places, 285 transitions, 3382 flow, removed 3 selfloop flow, removed 8 redundant places. [2024-06-03 18:37:46,591 INFO L231 Difference]: Finished difference. Result has 223 places, 266 transitions, 2822 flow [2024-06-03 18:37:46,591 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2702, PETRI_DIFFERENCE_MINUEND_PLACES=216, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=262, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=231, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2822, PETRI_PLACES=223, PETRI_TRANSITIONS=266} [2024-06-03 18:37:46,591 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 181 predicate places. [2024-06-03 18:37:46,592 INFO L495 AbstractCegarLoop]: Abstraction has has 223 places, 266 transitions, 2822 flow [2024-06-03 18:37:46,592 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:37:46,592 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:37:46,592 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] [2024-06-03 18:37:46,592 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2024-06-03 18:37:46,592 INFO L420 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 18:37:46,592 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:37:46,593 INFO L85 PathProgramCache]: Analyzing trace with hash -1204337510, now seen corresponding path program 7 times [2024-06-03 18:37:46,593 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:37:46,593 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [200384187] [2024-06-03 18:37:46,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:37:46,593 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:37:46,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:37:46,719 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:37:46,720 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:37:46,720 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [200384187] [2024-06-03 18:37:46,720 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [200384187] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:37:46,720 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:37:46,720 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 18:37:46,720 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1677378148] [2024-06-03 18:37:46,720 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:37:46,720 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 18:37:46,720 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:37:46,720 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 18:37:46,720 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-03 18:37:46,758 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 18:37:46,759 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 223 places, 266 transitions, 2822 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:37:46,759 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:37:46,759 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 18:37:46,759 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:37:47,078 INFO L124 PetriNetUnfolderBase]: 1579/2664 cut-off events. [2024-06-03 18:37:47,078 INFO L125 PetriNetUnfolderBase]: For 99316/99316 co-relation queries the response was YES. [2024-06-03 18:37:47,092 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16107 conditions, 2664 events. 1579/2664 cut-off events. For 99316/99316 co-relation queries the response was YES. Maximal size of possible extension queue 205. Compared 15528 event pairs, 348 based on Foata normal form. 8/2671 useless extension candidates. Maximal degree in co-relation 16001. Up to 2353 conditions per place. [2024-06-03 18:37:47,101 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 246 selfloop transitions, 32 changer transitions 0/284 dead transitions. [2024-06-03 18:37:47,101 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 229 places, 284 transitions, 3462 flow [2024-06-03 18:37:47,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 18:37:47,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 18:37:47,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 149 transitions. [2024-06-03 18:37:47,102 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.519163763066202 [2024-06-03 18:37:47,102 INFO L175 Difference]: Start difference. First operand has 223 places, 266 transitions, 2822 flow. Second operand 7 states and 149 transitions. [2024-06-03 18:37:47,102 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 229 places, 284 transitions, 3462 flow [2024-06-03 18:37:47,369 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 227 places, 284 transitions, 3423 flow, removed 5 selfloop flow, removed 2 redundant places. [2024-06-03 18:37:47,372 INFO L231 Difference]: Finished difference. Result has 228 places, 267 transitions, 2866 flow [2024-06-03 18:37:47,372 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2783, PETRI_DIFFERENCE_MINUEND_PLACES=221, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=266, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=234, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2866, PETRI_PLACES=228, PETRI_TRANSITIONS=267} [2024-06-03 18:37:47,373 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 186 predicate places. [2024-06-03 18:37:47,373 INFO L495 AbstractCegarLoop]: Abstraction has has 228 places, 267 transitions, 2866 flow [2024-06-03 18:37:47,373 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:37:47,373 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:37:47,373 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:37:47,373 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2024-06-03 18:37:47,373 INFO L420 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 18:37:47,374 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:37:47,374 INFO L85 PathProgramCache]: Analyzing trace with hash 1846809604, now seen corresponding path program 4 times [2024-06-03 18:37:47,374 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:37:47,374 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1665061871] [2024-06-03 18:37:47,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:37:47,374 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:37:47,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:37:47,505 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:37:47,506 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:37:47,506 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1665061871] [2024-06-03 18:37:47,506 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1665061871] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:37:47,506 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:37:47,506 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 18:37:47,506 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1812564078] [2024-06-03 18:37:47,506 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:37:47,506 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 18:37:47,507 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:37:47,507 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 18:37:47,507 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2024-06-03 18:37:47,551 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 18:37:47,551 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 228 places, 267 transitions, 2866 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:37:47,551 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:37:47,551 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 18:37:47,552 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:37:47,932 INFO L124 PetriNetUnfolderBase]: 1584/2676 cut-off events. [2024-06-03 18:37:47,933 INFO L125 PetriNetUnfolderBase]: For 94798/94812 co-relation queries the response was YES. [2024-06-03 18:37:47,947 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16325 conditions, 2676 events. 1584/2676 cut-off events. For 94798/94812 co-relation queries the response was YES. Maximal size of possible extension queue 206. Compared 15659 event pairs, 366 based on Foata normal form. 15/2691 useless extension candidates. Maximal degree in co-relation 16217. Up to 2296 conditions per place. [2024-06-03 18:37:47,956 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 217 selfloop transitions, 65 changer transitions 0/288 dead transitions. [2024-06-03 18:37:47,956 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 234 places, 288 transitions, 3672 flow [2024-06-03 18:37:47,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 18:37:47,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 18:37:47,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 155 transitions. [2024-06-03 18:37:47,957 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5400696864111498 [2024-06-03 18:37:47,957 INFO L175 Difference]: Start difference. First operand has 228 places, 267 transitions, 2866 flow. Second operand 7 states and 155 transitions. [2024-06-03 18:37:47,957 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 234 places, 288 transitions, 3672 flow [2024-06-03 18:37:48,142 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 229 places, 288 transitions, 3603 flow, removed 4 selfloop flow, removed 5 redundant places. [2024-06-03 18:37:48,145 INFO L231 Difference]: Finished difference. Result has 230 places, 273 transitions, 3047 flow [2024-06-03 18:37:48,145 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2797, PETRI_DIFFERENCE_MINUEND_PLACES=223, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=267, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=205, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3047, PETRI_PLACES=230, PETRI_TRANSITIONS=273} [2024-06-03 18:37:48,145 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 188 predicate places. [2024-06-03 18:37:48,145 INFO L495 AbstractCegarLoop]: Abstraction has has 230 places, 273 transitions, 3047 flow [2024-06-03 18:37:48,146 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:37:48,146 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:37:48,146 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] [2024-06-03 18:37:48,146 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2024-06-03 18:37:48,146 INFO L420 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 18:37:48,146 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:37:48,146 INFO L85 PathProgramCache]: Analyzing trace with hash -1397607000, now seen corresponding path program 5 times [2024-06-03 18:37:48,146 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:37:48,146 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [201968778] [2024-06-03 18:37:48,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:37:48,146 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:37:48,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:37:48,267 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:37:48,268 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:37:48,268 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [201968778] [2024-06-03 18:37:48,268 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [201968778] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:37:48,268 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:37:48,268 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 18:37:48,268 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2034534937] [2024-06-03 18:37:48,268 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:37:48,268 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 18:37:48,268 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:37:48,269 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 18:37:48,269 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-03 18:37:48,314 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 18:37:48,315 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 230 places, 273 transitions, 3047 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:37:48,315 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:37:48,315 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 18:37:48,315 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:37:48,702 INFO L124 PetriNetUnfolderBase]: 1581/2672 cut-off events. [2024-06-03 18:37:48,702 INFO L125 PetriNetUnfolderBase]: For 98317/98331 co-relation queries the response was YES. [2024-06-03 18:37:48,716 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16529 conditions, 2672 events. 1581/2672 cut-off events. For 98317/98331 co-relation queries the response was YES. Maximal size of possible extension queue 206. Compared 15615 event pairs, 360 based on Foata normal form. 15/2687 useless extension candidates. Maximal degree in co-relation 16420. Up to 2356 conditions per place. [2024-06-03 18:37:48,725 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 250 selfloop transitions, 33 changer transitions 0/289 dead transitions. [2024-06-03 18:37:48,725 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 235 places, 289 transitions, 3653 flow [2024-06-03 18:37:48,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 18:37:48,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 18:37:48,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 137 transitions. [2024-06-03 18:37:48,726 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.556910569105691 [2024-06-03 18:37:48,726 INFO L175 Difference]: Start difference. First operand has 230 places, 273 transitions, 3047 flow. Second operand 6 states and 137 transitions. [2024-06-03 18:37:48,726 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 235 places, 289 transitions, 3653 flow [2024-06-03 18:37:48,973 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 232 places, 289 transitions, 3533 flow, removed 41 selfloop flow, removed 3 redundant places. [2024-06-03 18:37:48,976 INFO L231 Difference]: Finished difference. Result has 233 places, 273 transitions, 2999 flow [2024-06-03 18:37:48,977 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2927, PETRI_DIFFERENCE_MINUEND_PLACES=227, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=273, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=240, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2999, PETRI_PLACES=233, PETRI_TRANSITIONS=273} [2024-06-03 18:37:48,977 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 191 predicate places. [2024-06-03 18:37:48,977 INFO L495 AbstractCegarLoop]: Abstraction has has 233 places, 273 transitions, 2999 flow [2024-06-03 18:37:48,977 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:37:48,977 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:37:48,977 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] [2024-06-03 18:37:48,977 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2024-06-03 18:37:48,978 INFO L420 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 18:37:48,978 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:37:48,978 INFO L85 PathProgramCache]: Analyzing trace with hash -1397191290, now seen corresponding path program 6 times [2024-06-03 18:37:48,978 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:37:48,978 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [670490626] [2024-06-03 18:37:48,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:37:48,978 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:37:48,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:37:49,086 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:37:49,086 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:37:49,086 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [670490626] [2024-06-03 18:37:49,086 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [670490626] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:37:49,086 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:37:49,086 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 18:37:49,086 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [456914020] [2024-06-03 18:37:49,087 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:37:49,087 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 18:37:49,087 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:37:49,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 18:37:49,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-03 18:37:49,140 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 18:37:49,140 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 233 places, 273 transitions, 2999 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:37:49,140 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:37:49,141 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 18:37:49,141 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:37:49,545 INFO L124 PetriNetUnfolderBase]: 1586/2681 cut-off events. [2024-06-03 18:37:49,545 INFO L125 PetriNetUnfolderBase]: For 100314/100326 co-relation queries the response was YES. [2024-06-03 18:37:49,557 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16476 conditions, 2681 events. 1586/2681 cut-off events. For 100314/100326 co-relation queries the response was YES. Maximal size of possible extension queue 208. Compared 15707 event pairs, 366 based on Foata normal form. 13/2694 useless extension candidates. Maximal degree in co-relation 16365. Up to 2318 conditions per place. [2024-06-03 18:37:49,566 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 226 selfloop transitions, 58 changer transitions 0/290 dead transitions. [2024-06-03 18:37:49,566 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 238 places, 290 transitions, 3759 flow [2024-06-03 18:37:49,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 18:37:49,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 18:37:49,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 137 transitions. [2024-06-03 18:37:49,566 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.556910569105691 [2024-06-03 18:37:49,566 INFO L175 Difference]: Start difference. First operand has 233 places, 273 transitions, 2999 flow. Second operand 6 states and 137 transitions. [2024-06-03 18:37:49,566 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 238 places, 290 transitions, 3759 flow [2024-06-03 18:37:49,885 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 231 places, 290 transitions, 3579 flow, removed 14 selfloop flow, removed 7 redundant places. [2024-06-03 18:37:49,888 INFO L231 Difference]: Finished difference. Result has 232 places, 276 transitions, 2997 flow [2024-06-03 18:37:49,889 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2819, PETRI_DIFFERENCE_MINUEND_PLACES=226, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=273, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=218, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2997, PETRI_PLACES=232, PETRI_TRANSITIONS=276} [2024-06-03 18:37:49,891 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 190 predicate places. [2024-06-03 18:37:49,892 INFO L495 AbstractCegarLoop]: Abstraction has has 232 places, 276 transitions, 2997 flow [2024-06-03 18:37:49,892 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:37:49,892 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:37:49,892 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:37:49,892 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2024-06-03 18:37:49,892 INFO L420 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 18:37:49,892 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:37:49,892 INFO L85 PathProgramCache]: Analyzing trace with hash -1392066060, now seen corresponding path program 7 times [2024-06-03 18:37:49,892 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:37:49,892 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1679957695] [2024-06-03 18:37:49,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:37:49,893 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:37:49,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:37:50,016 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:37:50,020 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:37:50,020 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1679957695] [2024-06-03 18:37:50,020 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1679957695] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:37:50,020 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:37:50,020 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 18:37:50,020 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1975418915] [2024-06-03 18:37:50,020 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:37:50,020 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 18:37:50,021 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:37:50,021 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 18:37:50,021 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-03 18:37:50,079 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 18:37:50,079 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 232 places, 276 transitions, 2997 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:37:50,079 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:37:50,079 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 18:37:50,079 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:37:50,441 INFO L124 PetriNetUnfolderBase]: 1591/2688 cut-off events. [2024-06-03 18:37:50,442 INFO L125 PetriNetUnfolderBase]: For 103766/103778 co-relation queries the response was YES. [2024-06-03 18:37:50,456 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16477 conditions, 2688 events. 1591/2688 cut-off events. For 103766/103778 co-relation queries the response was YES. Maximal size of possible extension queue 209. Compared 15724 event pairs, 360 based on Foata normal form. 13/2701 useless extension candidates. Maximal degree in co-relation 16367. Up to 2324 conditions per place. [2024-06-03 18:37:50,465 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 222 selfloop transitions, 68 changer transitions 0/296 dead transitions. [2024-06-03 18:37:50,465 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 240 places, 296 transitions, 3783 flow [2024-06-03 18:37:50,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 18:37:50,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 18:37:50,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 189 transitions. [2024-06-03 18:37:50,466 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5121951219512195 [2024-06-03 18:37:50,466 INFO L175 Difference]: Start difference. First operand has 232 places, 276 transitions, 2997 flow. Second operand 9 states and 189 transitions. [2024-06-03 18:37:50,466 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 240 places, 296 transitions, 3783 flow [2024-06-03 18:37:50,754 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 236 places, 296 transitions, 3613 flow, removed 22 selfloop flow, removed 4 redundant places. [2024-06-03 18:37:50,758 INFO L231 Difference]: Finished difference. Result has 237 places, 279 transitions, 3031 flow [2024-06-03 18:37:50,758 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2833, PETRI_DIFFERENCE_MINUEND_PLACES=228, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=276, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=211, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3031, PETRI_PLACES=237, PETRI_TRANSITIONS=279} [2024-06-03 18:37:50,758 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 195 predicate places. [2024-06-03 18:37:50,758 INFO L495 AbstractCegarLoop]: Abstraction has has 237 places, 279 transitions, 3031 flow [2024-06-03 18:37:50,758 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:37:50,759 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:37:50,759 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] [2024-06-03 18:37:50,759 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2024-06-03 18:37:50,759 INFO L420 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 18:37:50,759 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:37:50,759 INFO L85 PathProgramCache]: Analyzing trace with hash -1391828910, now seen corresponding path program 8 times [2024-06-03 18:37:50,759 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:37:50,759 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1641526160] [2024-06-03 18:37:50,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:37:50,760 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:37:50,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:37:50,877 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:37:50,877 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:37:50,877 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1641526160] [2024-06-03 18:37:50,877 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1641526160] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:37:50,877 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:37:50,877 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 18:37:50,877 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1504251080] [2024-06-03 18:37:50,877 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:37:50,877 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 18:37:50,877 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:37:50,878 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 18:37:50,878 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-03 18:37:50,912 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 18:37:50,913 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 237 places, 279 transitions, 3031 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:37:50,913 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:37:50,913 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 18:37:50,914 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:37:51,282 INFO L124 PetriNetUnfolderBase]: 1588/2684 cut-off events. [2024-06-03 18:37:51,282 INFO L125 PetriNetUnfolderBase]: For 105619/105631 co-relation queries the response was YES. [2024-06-03 18:37:51,296 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16434 conditions, 2684 events. 1588/2684 cut-off events. For 105619/105631 co-relation queries the response was YES. Maximal size of possible extension queue 209. Compared 15700 event pairs, 360 based on Foata normal form. 13/2697 useless extension candidates. Maximal degree in co-relation 16323. Up to 2321 conditions per place. [2024-06-03 18:37:51,305 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 223 selfloop transitions, 65 changer transitions 0/294 dead transitions. [2024-06-03 18:37:51,305 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 244 places, 294 transitions, 3643 flow [2024-06-03 18:37:51,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 18:37:51,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 18:37:51,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 171 transitions. [2024-06-03 18:37:51,306 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5213414634146342 [2024-06-03 18:37:51,306 INFO L175 Difference]: Start difference. First operand has 237 places, 279 transitions, 3031 flow. Second operand 8 states and 171 transitions. [2024-06-03 18:37:51,306 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 244 places, 294 transitions, 3643 flow [2024-06-03 18:37:51,582 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 237 places, 294 transitions, 3384 flow, removed 44 selfloop flow, removed 7 redundant places. [2024-06-03 18:37:51,586 INFO L231 Difference]: Finished difference. Result has 238 places, 279 transitions, 2908 flow [2024-06-03 18:37:51,586 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2772, PETRI_DIFFERENCE_MINUEND_PLACES=230, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=279, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=214, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2908, PETRI_PLACES=238, PETRI_TRANSITIONS=279} [2024-06-03 18:37:51,586 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 196 predicate places. [2024-06-03 18:37:51,586 INFO L495 AbstractCegarLoop]: Abstraction has has 238 places, 279 transitions, 2908 flow [2024-06-03 18:37:51,587 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:37:51,587 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:37:51,587 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:37:51,587 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2024-06-03 18:37:51,587 INFO L420 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 18:37:51,587 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:37:51,587 INFO L85 PathProgramCache]: Analyzing trace with hash -1392066246, now seen corresponding path program 10 times [2024-06-03 18:37:51,587 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:37:51,587 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [623886848] [2024-06-03 18:37:51,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:37:51,587 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:37:51,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:37:51,703 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:37:51,703 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:37:51,703 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [623886848] [2024-06-03 18:37:51,704 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [623886848] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:37:51,704 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:37:51,704 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 18:37:51,704 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [291301228] [2024-06-03 18:37:51,704 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:37:51,704 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 18:37:51,704 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:37:51,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 18:37:51,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-03 18:37:51,751 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 18:37:51,751 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 238 places, 279 transitions, 2908 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:37:51,752 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:37:51,752 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 18:37:51,752 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:37:52,129 INFO L124 PetriNetUnfolderBase]: 1593/2691 cut-off events. [2024-06-03 18:37:52,129 INFO L125 PetriNetUnfolderBase]: For 108994/109006 co-relation queries the response was YES. [2024-06-03 18:37:52,142 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16364 conditions, 2691 events. 1593/2691 cut-off events. For 108994/109006 co-relation queries the response was YES. Maximal size of possible extension queue 211. Compared 15737 event pairs, 360 based on Foata normal form. 13/2704 useless extension candidates. Maximal degree in co-relation 16253. Up to 2328 conditions per place. [2024-06-03 18:37:52,150 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 226 selfloop transitions, 68 changer transitions 0/300 dead transitions. [2024-06-03 18:37:52,150 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 245 places, 300 transitions, 3594 flow [2024-06-03 18:37:52,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 18:37:52,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 18:37:52,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 175 transitions. [2024-06-03 18:37:52,151 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5335365853658537 [2024-06-03 18:37:52,151 INFO L175 Difference]: Start difference. First operand has 238 places, 279 transitions, 2908 flow. Second operand 8 states and 175 transitions. [2024-06-03 18:37:52,151 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 245 places, 300 transitions, 3594 flow [2024-06-03 18:37:52,445 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 237 places, 300 transitions, 3426 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-06-03 18:37:52,448 INFO L231 Difference]: Finished difference. Result has 238 places, 282 transitions, 2946 flow [2024-06-03 18:37:52,448 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2740, PETRI_DIFFERENCE_MINUEND_PLACES=230, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=279, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=211, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2946, PETRI_PLACES=238, PETRI_TRANSITIONS=282} [2024-06-03 18:37:52,449 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 196 predicate places. [2024-06-03 18:37:52,449 INFO L495 AbstractCegarLoop]: Abstraction has has 238 places, 282 transitions, 2946 flow [2024-06-03 18:37:52,449 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:37:52,449 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:37:52,449 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] [2024-06-03 18:37:52,449 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2024-06-03 18:37:52,449 INFO L420 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 18:37:52,449 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:37:52,449 INFO L85 PathProgramCache]: Analyzing trace with hash -1204334534, now seen corresponding path program 11 times [2024-06-03 18:37:52,449 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:37:52,449 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2114853336] [2024-06-03 18:37:52,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:37:52,449 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:37:52,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:37:52,565 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:37:52,565 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:37:52,566 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2114853336] [2024-06-03 18:37:52,566 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2114853336] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:37:52,566 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:37:52,566 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 18:37:52,566 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1613614616] [2024-06-03 18:37:52,566 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:37:52,566 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 18:37:52,566 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:37:52,566 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 18:37:52,566 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2024-06-03 18:37:52,594 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 18:37:52,594 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 238 places, 282 transitions, 2946 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:37:52,594 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:37:52,594 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 18:37:52,594 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:37:52,921 INFO L124 PetriNetUnfolderBase]: 1590/2685 cut-off events. [2024-06-03 18:37:52,922 INFO L125 PetriNetUnfolderBase]: For 111512/111516 co-relation queries the response was YES. [2024-06-03 18:37:52,936 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16546 conditions, 2685 events. 1590/2685 cut-off events. For 111512/111516 co-relation queries the response was YES. Maximal size of possible extension queue 211. Compared 15692 event pairs, 382 based on Foata normal form. 5/2689 useless extension candidates. Maximal degree in co-relation 16434. Up to 2285 conditions per place. [2024-06-03 18:37:52,944 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 202 selfloop transitions, 88 changer transitions 0/296 dead transitions. [2024-06-03 18:37:52,945 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 244 places, 296 transitions, 3612 flow [2024-06-03 18:37:52,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 18:37:52,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 18:37:52,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 151 transitions. [2024-06-03 18:37:52,945 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5261324041811847 [2024-06-03 18:37:52,945 INFO L175 Difference]: Start difference. First operand has 238 places, 282 transitions, 2946 flow. Second operand 7 states and 151 transitions. [2024-06-03 18:37:52,946 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 244 places, 296 transitions, 3612 flow [2024-06-03 18:37:53,219 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 238 places, 296 transitions, 3430 flow, removed 27 selfloop flow, removed 6 redundant places. [2024-06-03 18:37:53,222 INFO L231 Difference]: Finished difference. Result has 239 places, 285 transitions, 3012 flow [2024-06-03 18:37:53,222 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2768, PETRI_DIFFERENCE_MINUEND_PLACES=232, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=282, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=85, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=194, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3012, PETRI_PLACES=239, PETRI_TRANSITIONS=285} [2024-06-03 18:37:53,222 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 197 predicate places. [2024-06-03 18:37:53,223 INFO L495 AbstractCegarLoop]: Abstraction has has 239 places, 285 transitions, 3012 flow [2024-06-03 18:37:53,223 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:37:53,223 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:37:53,223 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] [2024-06-03 18:37:53,223 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2024-06-03 18:37:53,223 INFO L420 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 18:37:53,223 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:37:53,223 INFO L85 PathProgramCache]: Analyzing trace with hash -1203937796, now seen corresponding path program 2 times [2024-06-03 18:37:53,223 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:37:53,223 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1059933605] [2024-06-03 18:37:53,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:37:53,223 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:37:53,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:37:53,347 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:37:53,347 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:37:53,347 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1059933605] [2024-06-03 18:37:53,347 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1059933605] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:37:53,347 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:37:53,347 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 18:37:53,347 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1675581076] [2024-06-03 18:37:53,347 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:37:53,347 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 18:37:53,347 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:37:53,348 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 18:37:53,348 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-03 18:37:53,391 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 18:37:53,392 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 239 places, 285 transitions, 3012 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:37:53,392 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:37:53,392 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 18:37:53,392 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:37:53,729 INFO L124 PetriNetUnfolderBase]: 1610/2718 cut-off events. [2024-06-03 18:37:53,729 INFO L125 PetriNetUnfolderBase]: For 119028/119028 co-relation queries the response was YES. [2024-06-03 18:37:53,743 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16736 conditions, 2718 events. 1610/2718 cut-off events. For 119028/119028 co-relation queries the response was YES. Maximal size of possible extension queue 213. Compared 15933 event pairs, 348 based on Foata normal form. 6/2723 useless extension candidates. Maximal degree in co-relation 16623. Up to 2371 conditions per place. [2024-06-03 18:37:53,752 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 268 selfloop transitions, 34 changer transitions 0/308 dead transitions. [2024-06-03 18:37:53,752 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 245 places, 308 transitions, 3746 flow [2024-06-03 18:37:53,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 18:37:53,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 18:37:53,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 152 transitions. [2024-06-03 18:37:53,753 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5296167247386759 [2024-06-03 18:37:53,753 INFO L175 Difference]: Start difference. First operand has 239 places, 285 transitions, 3012 flow. Second operand 7 states and 152 transitions. [2024-06-03 18:37:53,753 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 245 places, 308 transitions, 3746 flow [2024-06-03 18:37:54,041 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 240 places, 308 transitions, 3524 flow, removed 25 selfloop flow, removed 5 redundant places. [2024-06-03 18:37:54,044 INFO L231 Difference]: Finished difference. Result has 242 places, 288 transitions, 2904 flow [2024-06-03 18:37:54,044 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2790, PETRI_DIFFERENCE_MINUEND_PLACES=234, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=285, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=252, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2904, PETRI_PLACES=242, PETRI_TRANSITIONS=288} [2024-06-03 18:37:54,045 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 200 predicate places. [2024-06-03 18:37:54,045 INFO L495 AbstractCegarLoop]: Abstraction has has 242 places, 288 transitions, 2904 flow [2024-06-03 18:37:54,045 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:37:54,045 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:37:54,045 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] [2024-06-03 18:37:54,045 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2024-06-03 18:37:54,045 INFO L420 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 18:37:54,045 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:37:54,045 INFO L85 PathProgramCache]: Analyzing trace with hash -761108996, now seen corresponding path program 3 times [2024-06-03 18:37:54,045 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:37:54,045 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1366673731] [2024-06-03 18:37:54,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:37:54,045 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:37:54,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:37:54,160 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:37:54,161 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:37:54,161 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1366673731] [2024-06-03 18:37:54,161 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1366673731] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:37:54,161 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:37:54,161 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 18:37:54,161 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1590470345] [2024-06-03 18:37:54,161 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:37:54,161 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 18:37:54,162 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:37:54,162 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 18:37:54,162 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-03 18:37:54,223 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 18:37:54,223 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 242 places, 288 transitions, 2904 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:37:54,223 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:37:54,223 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 18:37:54,224 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:37:54,573 INFO L124 PetriNetUnfolderBase]: 1597/2699 cut-off events. [2024-06-03 18:37:54,573 INFO L125 PetriNetUnfolderBase]: For 113401/113401 co-relation queries the response was YES. [2024-06-03 18:37:54,587 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16304 conditions, 2699 events. 1597/2699 cut-off events. For 113401/113401 co-relation queries the response was YES. Maximal size of possible extension queue 213. Compared 15760 event pairs, 339 based on Foata normal form. 6/2704 useless extension candidates. Maximal degree in co-relation 16189. Up to 2188 conditions per place. [2024-06-03 18:37:54,595 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 264 selfloop transitions, 41 changer transitions 0/311 dead transitions. [2024-06-03 18:37:54,596 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 248 places, 311 transitions, 3634 flow [2024-06-03 18:37:54,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 18:37:54,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 18:37:54,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 152 transitions. [2024-06-03 18:37:54,596 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5296167247386759 [2024-06-03 18:37:54,596 INFO L175 Difference]: Start difference. First operand has 242 places, 288 transitions, 2904 flow. Second operand 7 states and 152 transitions. [2024-06-03 18:37:54,596 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 248 places, 311 transitions, 3634 flow [2024-06-03 18:37:54,882 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 244 places, 311 transitions, 3552 flow, removed 11 selfloop flow, removed 4 redundant places. [2024-06-03 18:37:54,885 INFO L231 Difference]: Finished difference. Result has 246 places, 290 transitions, 2933 flow [2024-06-03 18:37:54,885 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2824, PETRI_DIFFERENCE_MINUEND_PLACES=238, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=288, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=248, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2933, PETRI_PLACES=246, PETRI_TRANSITIONS=290} [2024-06-03 18:37:54,885 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 204 predicate places. [2024-06-03 18:37:54,886 INFO L495 AbstractCegarLoop]: Abstraction has has 246 places, 290 transitions, 2933 flow [2024-06-03 18:37:54,886 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:37:54,886 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:37:54,886 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] [2024-06-03 18:37:54,886 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2024-06-03 18:37:54,886 INFO L420 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 18:37:54,886 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:37:54,886 INFO L85 PathProgramCache]: Analyzing trace with hash -1371040888, now seen corresponding path program 1 times [2024-06-03 18:37:54,887 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:37:54,887 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1245469498] [2024-06-03 18:37:54,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:37:54,887 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:37:54,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:37:55,003 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:37:55,004 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:37:55,004 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1245469498] [2024-06-03 18:37:55,004 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1245469498] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:37:55,004 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:37:55,004 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 18:37:55,004 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [492523848] [2024-06-03 18:37:55,004 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:37:55,004 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 18:37:55,004 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:37:55,004 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 18:37:55,004 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-03 18:37:55,051 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 18:37:55,051 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 246 places, 290 transitions, 2933 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:37:55,051 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:37:55,051 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 18:37:55,051 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:37:55,405 INFO L124 PetriNetUnfolderBase]: 1650/2788 cut-off events. [2024-06-03 18:37:55,406 INFO L125 PetriNetUnfolderBase]: For 126647/126651 co-relation queries the response was YES. [2024-06-03 18:37:55,422 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17061 conditions, 2788 events. 1650/2788 cut-off events. For 126647/126651 co-relation queries the response was YES. Maximal size of possible extension queue 216. Compared 16403 event pairs, 346 based on Foata normal form. 10/2798 useless extension candidates. Maximal degree in co-relation 16944. Up to 2385 conditions per place. [2024-06-03 18:37:55,432 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 292 selfloop transitions, 28 changer transitions 0/326 dead transitions. [2024-06-03 18:37:55,432 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 252 places, 326 transitions, 3857 flow [2024-06-03 18:37:55,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 18:37:55,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 18:37:55,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 159 transitions. [2024-06-03 18:37:55,433 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.554006968641115 [2024-06-03 18:37:55,433 INFO L175 Difference]: Start difference. First operand has 246 places, 290 transitions, 2933 flow. Second operand 7 states and 159 transitions. [2024-06-03 18:37:55,433 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 252 places, 326 transitions, 3857 flow [2024-06-03 18:37:55,741 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 246 places, 326 transitions, 3706 flow, removed 11 selfloop flow, removed 6 redundant places. [2024-06-03 18:37:55,744 INFO L231 Difference]: Finished difference. Result has 249 places, 295 transitions, 2901 flow [2024-06-03 18:37:55,745 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2790, PETRI_DIFFERENCE_MINUEND_PLACES=240, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=290, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=264, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2901, PETRI_PLACES=249, PETRI_TRANSITIONS=295} [2024-06-03 18:37:55,745 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 207 predicate places. [2024-06-03 18:37:55,745 INFO L495 AbstractCegarLoop]: Abstraction has has 249 places, 295 transitions, 2901 flow [2024-06-03 18:37:55,745 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:37:55,745 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:37:55,745 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] [2024-06-03 18:37:55,745 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2024-06-03 18:37:55,745 INFO L420 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 18:37:55,745 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:37:55,745 INFO L85 PathProgramCache]: Analyzing trace with hash -497252890, now seen corresponding path program 2 times [2024-06-03 18:37:55,746 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:37:55,746 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1021365235] [2024-06-03 18:37:55,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:37:55,746 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:37:55,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:37:55,871 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:37:55,871 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:37:55,871 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1021365235] [2024-06-03 18:37:55,871 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1021365235] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:37:55,871 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:37:55,871 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 18:37:55,871 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1883446685] [2024-06-03 18:37:55,871 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:37:55,871 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 18:37:55,872 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:37:55,872 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 18:37:55,872 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-03 18:37:55,916 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 18:37:55,927 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 249 places, 295 transitions, 2901 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:37:55,927 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:37:55,927 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 18:37:55,927 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:37:56,295 INFO L124 PetriNetUnfolderBase]: 1678/2836 cut-off events. [2024-06-03 18:37:56,295 INFO L125 PetriNetUnfolderBase]: For 134002/134006 co-relation queries the response was YES. [2024-06-03 18:37:56,311 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17072 conditions, 2836 events. 1678/2836 cut-off events. For 134002/134006 co-relation queries the response was YES. Maximal size of possible extension queue 222. Compared 16785 event pairs, 360 based on Foata normal form. 12/2848 useless extension candidates. Maximal degree in co-relation 16954. Up to 2525 conditions per place. [2024-06-03 18:37:56,321 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 285 selfloop transitions, 26 changer transitions 0/317 dead transitions. [2024-06-03 18:37:56,321 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 255 places, 317 transitions, 3619 flow [2024-06-03 18:37:56,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 18:37:56,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 18:37:56,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 152 transitions. [2024-06-03 18:37:56,322 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5296167247386759 [2024-06-03 18:37:56,322 INFO L175 Difference]: Start difference. First operand has 249 places, 295 transitions, 2901 flow. Second operand 7 states and 152 transitions. [2024-06-03 18:37:56,322 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 255 places, 317 transitions, 3619 flow [2024-06-03 18:37:56,701 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 253 places, 317 transitions, 3587 flow, removed 3 selfloop flow, removed 2 redundant places. [2024-06-03 18:37:56,704 INFO L231 Difference]: Finished difference. Result has 254 places, 296 transitions, 2937 flow [2024-06-03 18:37:56,704 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2869, PETRI_DIFFERENCE_MINUEND_PLACES=247, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=295, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=269, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2937, PETRI_PLACES=254, PETRI_TRANSITIONS=296} [2024-06-03 18:37:56,704 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 212 predicate places. [2024-06-03 18:37:56,704 INFO L495 AbstractCegarLoop]: Abstraction has has 254 places, 296 transitions, 2937 flow [2024-06-03 18:37:56,705 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:37:56,705 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:37:56,705 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] [2024-06-03 18:37:56,705 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2024-06-03 18:37:56,705 INFO L420 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 18:37:56,705 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:37:56,705 INFO L85 PathProgramCache]: Analyzing trace with hash -497400760, now seen corresponding path program 3 times [2024-06-03 18:37:56,705 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:37:56,705 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1146552196] [2024-06-03 18:37:56,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:37:56,705 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:37:56,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:37:56,836 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:37:56,837 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:37:56,837 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1146552196] [2024-06-03 18:37:56,837 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1146552196] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:37:56,837 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:37:56,837 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 18:37:56,837 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1363807441] [2024-06-03 18:37:56,837 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:37:56,837 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 18:37:56,837 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:37:56,837 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 18:37:56,837 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-03 18:37:56,870 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 18:37:56,870 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 254 places, 296 transitions, 2937 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:37:56,870 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:37:56,870 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 18:37:56,870 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:37:57,238 INFO L124 PetriNetUnfolderBase]: 1698/2868 cut-off events. [2024-06-03 18:37:57,239 INFO L125 PetriNetUnfolderBase]: For 135209/135213 co-relation queries the response was YES. [2024-06-03 18:37:57,255 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17414 conditions, 2868 events. 1698/2868 cut-off events. For 135209/135213 co-relation queries the response was YES. Maximal size of possible extension queue 224. Compared 17004 event pairs, 358 based on Foata normal form. 10/2878 useless extension candidates. Maximal degree in co-relation 17294. Up to 2527 conditions per place. [2024-06-03 18:37:57,265 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 289 selfloop transitions, 28 changer transitions 0/323 dead transitions. [2024-06-03 18:37:57,265 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 260 places, 323 transitions, 3707 flow [2024-06-03 18:37:57,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 18:37:57,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 18:37:57,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 155 transitions. [2024-06-03 18:37:57,265 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5400696864111498 [2024-06-03 18:37:57,265 INFO L175 Difference]: Start difference. First operand has 254 places, 296 transitions, 2937 flow. Second operand 7 states and 155 transitions. [2024-06-03 18:37:57,265 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 260 places, 323 transitions, 3707 flow [2024-06-03 18:37:57,591 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 255 places, 323 transitions, 3656 flow, removed 1 selfloop flow, removed 5 redundant places. [2024-06-03 18:37:57,595 INFO L231 Difference]: Finished difference. Result has 257 places, 299 transitions, 2983 flow [2024-06-03 18:37:57,595 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2886, PETRI_DIFFERENCE_MINUEND_PLACES=249, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=296, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=269, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2983, PETRI_PLACES=257, PETRI_TRANSITIONS=299} [2024-06-03 18:37:57,595 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 215 predicate places. [2024-06-03 18:37:57,595 INFO L495 AbstractCegarLoop]: Abstraction has has 257 places, 299 transitions, 2983 flow [2024-06-03 18:37:57,595 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:37:57,595 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:37:57,595 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] [2024-06-03 18:37:57,595 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2024-06-03 18:37:57,595 INFO L420 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 18:37:57,596 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:37:57,596 INFO L85 PathProgramCache]: Analyzing trace with hash -1397182362, now seen corresponding path program 4 times [2024-06-03 18:37:57,596 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:37:57,596 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [516757307] [2024-06-03 18:37:57,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:37:57,596 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:37:57,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:37:57,725 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:37:57,725 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:37:57,725 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [516757307] [2024-06-03 18:37:57,725 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [516757307] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:37:57,725 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:37:57,725 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 18:37:57,725 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [943053377] [2024-06-03 18:37:57,725 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:37:57,725 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 18:37:57,726 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:37:57,726 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 18:37:57,726 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-03 18:37:57,768 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 18:37:57,768 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 257 places, 299 transitions, 2983 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:37:57,768 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:37:57,768 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 18:37:57,768 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:37:58,162 INFO L124 PetriNetUnfolderBase]: 1726/2916 cut-off events. [2024-06-03 18:37:58,162 INFO L125 PetriNetUnfolderBase]: For 143408/143412 co-relation queries the response was YES. [2024-06-03 18:37:58,179 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17809 conditions, 2916 events. 1726/2916 cut-off events. For 143408/143412 co-relation queries the response was YES. Maximal size of possible extension queue 230. Compared 17388 event pairs, 370 based on Foata normal form. 12/2928 useless extension candidates. Maximal degree in co-relation 17687. Up to 2607 conditions per place. [2024-06-03 18:37:58,189 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 293 selfloop transitions, 21 changer transitions 0/320 dead transitions. [2024-06-03 18:37:58,189 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 262 places, 320 transitions, 3709 flow [2024-06-03 18:37:58,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 18:37:58,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 18:37:58,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 135 transitions. [2024-06-03 18:37:58,189 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5487804878048781 [2024-06-03 18:37:58,189 INFO L175 Difference]: Start difference. First operand has 257 places, 299 transitions, 2983 flow. Second operand 6 states and 135 transitions. [2024-06-03 18:37:58,189 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 262 places, 320 transitions, 3709 flow [2024-06-03 18:37:58,571 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 259 places, 320 transitions, 3675 flow, removed 3 selfloop flow, removed 3 redundant places. [2024-06-03 18:37:58,574 INFO L231 Difference]: Finished difference. Result has 260 places, 300 transitions, 3011 flow [2024-06-03 18:37:58,575 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2949, PETRI_DIFFERENCE_MINUEND_PLACES=254, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=299, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=278, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3011, PETRI_PLACES=260, PETRI_TRANSITIONS=300} [2024-06-03 18:37:58,575 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 218 predicate places. [2024-06-03 18:37:58,575 INFO L495 AbstractCegarLoop]: Abstraction has has 260 places, 300 transitions, 3011 flow [2024-06-03 18:37:58,575 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:37:58,575 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:37:58,575 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] [2024-06-03 18:37:58,575 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2024-06-03 18:37:58,575 INFO L420 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 18:37:58,576 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:37:58,576 INFO L85 PathProgramCache]: Analyzing trace with hash -1397330232, now seen corresponding path program 5 times [2024-06-03 18:37:58,576 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:37:58,576 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [632701087] [2024-06-03 18:37:58,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:37:58,576 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:37:58,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:37:58,701 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:37:58,702 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:37:58,702 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [632701087] [2024-06-03 18:37:58,702 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [632701087] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:37:58,702 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:37:58,702 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 18:37:58,702 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [525579597] [2024-06-03 18:37:58,702 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:37:58,702 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 18:37:58,702 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:37:58,702 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 18:37:58,702 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-03 18:37:58,740 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 18:37:58,740 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 260 places, 300 transitions, 3011 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:37:58,740 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:37:58,740 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 18:37:58,740 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:37:59,209 INFO L124 PetriNetUnfolderBase]: 1746/2948 cut-off events. [2024-06-03 18:37:59,209 INFO L125 PetriNetUnfolderBase]: For 144610/144614 co-relation queries the response was YES. [2024-06-03 18:37:59,225 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18151 conditions, 2948 events. 1746/2948 cut-off events. For 144610/144614 co-relation queries the response was YES. Maximal size of possible extension queue 232. Compared 17546 event pairs, 360 based on Foata normal form. 10/2958 useless extension candidates. Maximal degree in co-relation 18027. Up to 2541 conditions per place. [2024-06-03 18:37:59,233 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 299 selfloop transitions, 24 changer transitions 0/329 dead transitions. [2024-06-03 18:37:59,233 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 265 places, 329 transitions, 3916 flow [2024-06-03 18:37:59,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 18:37:59,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 18:37:59,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 142 transitions. [2024-06-03 18:37:59,234 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5772357723577236 [2024-06-03 18:37:59,234 INFO L175 Difference]: Start difference. First operand has 260 places, 300 transitions, 3011 flow. Second operand 6 states and 142 transitions. [2024-06-03 18:37:59,234 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 265 places, 329 transitions, 3916 flow [2024-06-03 18:37:59,628 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 261 places, 329 transitions, 3871 flow, removed 3 selfloop flow, removed 4 redundant places. [2024-06-03 18:37:59,632 INFO L231 Difference]: Finished difference. Result has 263 places, 302 transitions, 3050 flow [2024-06-03 18:37:59,632 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2966, PETRI_DIFFERENCE_MINUEND_PLACES=256, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=300, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=277, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3050, PETRI_PLACES=263, PETRI_TRANSITIONS=302} [2024-06-03 18:37:59,632 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 221 predicate places. [2024-06-03 18:37:59,632 INFO L495 AbstractCegarLoop]: Abstraction has has 263 places, 302 transitions, 3050 flow [2024-06-03 18:37:59,632 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:37:59,632 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:37:59,633 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] [2024-06-03 18:37:59,633 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2024-06-03 18:37:59,633 INFO L420 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 18:37:59,633 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:37:59,633 INFO L85 PathProgramCache]: Analyzing trace with hash -1391819982, now seen corresponding path program 6 times [2024-06-03 18:37:59,633 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:37:59,633 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1264996625] [2024-06-03 18:37:59,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:37:59,634 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:37:59,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:37:59,762 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:37:59,763 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:37:59,763 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1264996625] [2024-06-03 18:37:59,763 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1264996625] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:37:59,763 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:37:59,763 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 18:37:59,763 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1016249379] [2024-06-03 18:37:59,763 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:37:59,763 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 18:37:59,763 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:37:59,763 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 18:37:59,763 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-03 18:37:59,793 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 18:37:59,794 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 263 places, 302 transitions, 3050 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:37:59,794 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:37:59,794 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 18:37:59,794 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:38:00,221 INFO L124 PetriNetUnfolderBase]: 1728/2922 cut-off events. [2024-06-03 18:38:00,222 INFO L125 PetriNetUnfolderBase]: For 137879/137883 co-relation queries the response was YES. [2024-06-03 18:38:00,239 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17660 conditions, 2922 events. 1728/2922 cut-off events. For 137879/137883 co-relation queries the response was YES. Maximal size of possible extension queue 232. Compared 17424 event pairs, 364 based on Foata normal form. 12/2934 useless extension candidates. Maximal degree in co-relation 17534. Up to 2613 conditions per place. [2024-06-03 18:38:00,249 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 296 selfloop transitions, 23 changer transitions 0/325 dead transitions. [2024-06-03 18:38:00,249 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 270 places, 325 transitions, 3795 flow [2024-06-03 18:38:00,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 18:38:00,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 18:38:00,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 168 transitions. [2024-06-03 18:38:00,249 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5121951219512195 [2024-06-03 18:38:00,250 INFO L175 Difference]: Start difference. First operand has 263 places, 302 transitions, 3050 flow. Second operand 8 states and 168 transitions. [2024-06-03 18:38:00,250 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 270 places, 325 transitions, 3795 flow [2024-06-03 18:38:00,585 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 265 places, 325 transitions, 3701 flow, removed 10 selfloop flow, removed 5 redundant places. [2024-06-03 18:38:00,588 INFO L231 Difference]: Finished difference. Result has 266 places, 303 transitions, 3027 flow [2024-06-03 18:38:00,589 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2964, PETRI_DIFFERENCE_MINUEND_PLACES=258, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=302, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=279, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3027, PETRI_PLACES=266, PETRI_TRANSITIONS=303} [2024-06-03 18:38:00,589 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 224 predicate places. [2024-06-03 18:38:00,589 INFO L495 AbstractCegarLoop]: Abstraction has has 266 places, 303 transitions, 3027 flow [2024-06-03 18:38:00,589 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:38:00,589 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:38:00,589 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] [2024-06-03 18:38:00,589 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2024-06-03 18:38:00,589 INFO L420 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 18:38:00,590 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:38:00,590 INFO L85 PathProgramCache]: Analyzing trace with hash -1391604780, now seen corresponding path program 1 times [2024-06-03 18:38:00,590 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:38:00,590 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1682194732] [2024-06-03 18:38:00,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:38:00,590 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:38:00,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:38:00,724 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:38:00,724 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:38:00,724 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1682194732] [2024-06-03 18:38:00,724 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1682194732] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:38:00,724 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:38:00,725 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 18:38:00,725 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [124089573] [2024-06-03 18:38:00,725 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:38:00,725 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 18:38:00,725 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:38:00,725 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 18:38:00,725 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-03 18:38:00,776 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 18:38:00,776 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 266 places, 303 transitions, 3027 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:38:00,776 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:38:00,776 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 18:38:00,776 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:38:01,203 INFO L124 PetriNetUnfolderBase]: 1715/2895 cut-off events. [2024-06-03 18:38:01,203 INFO L125 PetriNetUnfolderBase]: For 124882/124886 co-relation queries the response was YES. [2024-06-03 18:38:01,222 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17022 conditions, 2895 events. 1715/2895 cut-off events. For 124882/124886 co-relation queries the response was YES. Maximal size of possible extension queue 232. Compared 17145 event pairs, 341 based on Foata normal form. 10/2905 useless extension candidates. Maximal degree in co-relation 16896. Up to 2522 conditions per place. [2024-06-03 18:38:01,231 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 295 selfloop transitions, 28 changer transitions 0/329 dead transitions. [2024-06-03 18:38:01,232 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 273 places, 329 transitions, 3788 flow [2024-06-03 18:38:01,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 18:38:01,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 18:38:01,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 171 transitions. [2024-06-03 18:38:01,232 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5213414634146342 [2024-06-03 18:38:01,232 INFO L175 Difference]: Start difference. First operand has 266 places, 303 transitions, 3027 flow. Second operand 8 states and 171 transitions. [2024-06-03 18:38:01,232 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 273 places, 329 transitions, 3788 flow [2024-06-03 18:38:01,730 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 267 places, 329 transitions, 3743 flow, removed 1 selfloop flow, removed 6 redundant places. [2024-06-03 18:38:01,733 INFO L231 Difference]: Finished difference. Result has 268 places, 303 transitions, 3042 flow [2024-06-03 18:38:01,733 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2982, PETRI_DIFFERENCE_MINUEND_PLACES=260, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=303, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=275, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3042, PETRI_PLACES=268, PETRI_TRANSITIONS=303} [2024-06-03 18:38:01,733 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 226 predicate places. [2024-06-03 18:38:01,734 INFO L495 AbstractCegarLoop]: Abstraction has has 268 places, 303 transitions, 3042 flow [2024-06-03 18:38:01,734 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:38:01,734 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:38:01,734 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:38:01,734 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2024-06-03 18:38:01,734 INFO L420 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 18:38:01,734 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:38:01,735 INFO L85 PathProgramCache]: Analyzing trace with hash -737770862, now seen corresponding path program 1 times [2024-06-03 18:38:01,735 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:38:01,735 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [580909950] [2024-06-03 18:38:01,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:38:01,735 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:38:01,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:38:01,865 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:38:01,865 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:38:01,865 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [580909950] [2024-06-03 18:38:01,865 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [580909950] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:38:01,865 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:38:01,865 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 18:38:01,865 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1160023914] [2024-06-03 18:38:01,865 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:38:01,866 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 18:38:01,866 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:38:01,867 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 18:38:01,867 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2024-06-03 18:38:01,918 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 18:38:01,918 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 268 places, 303 transitions, 3042 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:38:01,919 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:38:01,919 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 18:38:01,919 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:38:02,361 INFO L124 PetriNetUnfolderBase]: 1736/2932 cut-off events. [2024-06-03 18:38:02,361 INFO L125 PetriNetUnfolderBase]: For 123262/123270 co-relation queries the response was YES. [2024-06-03 18:38:02,380 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17484 conditions, 2932 events. 1736/2932 cut-off events. For 123262/123270 co-relation queries the response was YES. Maximal size of possible extension queue 237. Compared 17479 event pairs, 397 based on Foata normal form. 9/2940 useless extension candidates. Maximal degree in co-relation 17357. Up to 2352 conditions per place. [2024-06-03 18:38:02,389 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 177 selfloop transitions, 159 changer transitions 0/342 dead transitions. [2024-06-03 18:38:02,389 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 279 places, 342 transitions, 4192 flow [2024-06-03 18:38:02,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-03 18:38:02,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-03 18:38:02,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 255 transitions. [2024-06-03 18:38:02,390 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5182926829268293 [2024-06-03 18:38:02,390 INFO L175 Difference]: Start difference. First operand has 268 places, 303 transitions, 3042 flow. Second operand 12 states and 255 transitions. [2024-06-03 18:38:02,390 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 279 places, 342 transitions, 4192 flow [2024-06-03 18:38:02,816 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 272 places, 342 transitions, 4114 flow, removed 2 selfloop flow, removed 7 redundant places. [2024-06-03 18:38:02,820 INFO L231 Difference]: Finished difference. Result has 273 places, 312 transitions, 3444 flow [2024-06-03 18:38:02,820 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2964, PETRI_DIFFERENCE_MINUEND_PLACES=261, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=303, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=153, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=150, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=3444, PETRI_PLACES=273, PETRI_TRANSITIONS=312} [2024-06-03 18:38:02,820 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 231 predicate places. [2024-06-03 18:38:02,820 INFO L495 AbstractCegarLoop]: Abstraction has has 273 places, 312 transitions, 3444 flow [2024-06-03 18:38:02,820 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:38:02,820 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:38:02,820 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:38:02,820 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2024-06-03 18:38:02,821 INFO L420 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 18:38:02,821 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:38:02,821 INFO L85 PathProgramCache]: Analyzing trace with hash -269123494, now seen corresponding path program 2 times [2024-06-03 18:38:02,821 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:38:02,821 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [792120968] [2024-06-03 18:38:02,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:38:02,821 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:38:02,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:38:02,953 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:38:02,953 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:38:02,953 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [792120968] [2024-06-03 18:38:02,953 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [792120968] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:38:02,953 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:38:02,953 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 18:38:02,954 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [140161137] [2024-06-03 18:38:02,954 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:38:02,954 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 18:38:02,954 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:38:02,954 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 18:38:02,954 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-03 18:38:02,994 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 18:38:02,994 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 273 places, 312 transitions, 3444 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:38:02,995 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:38:02,995 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 18:38:02,995 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:38:03,507 INFO L124 PetriNetUnfolderBase]: 1749/2955 cut-off events. [2024-06-03 18:38:03,507 INFO L125 PetriNetUnfolderBase]: For 131598/131610 co-relation queries the response was YES. [2024-06-03 18:38:03,526 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18179 conditions, 2955 events. 1749/2955 cut-off events. For 131598/131610 co-relation queries the response was YES. Maximal size of possible extension queue 241. Compared 17634 event pairs, 380 based on Foata normal form. 13/2968 useless extension candidates. Maximal degree in co-relation 18052. Up to 2542 conditions per place. [2024-06-03 18:38:03,535 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 243 selfloop transitions, 96 changer transitions 0/345 dead transitions. [2024-06-03 18:38:03,535 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 285 places, 345 transitions, 4428 flow [2024-06-03 18:38:03,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-03 18:38:03,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-03 18:38:03,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 263 transitions. [2024-06-03 18:38:03,536 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49343339587242024 [2024-06-03 18:38:03,536 INFO L175 Difference]: Start difference. First operand has 273 places, 312 transitions, 3444 flow. Second operand 13 states and 263 transitions. [2024-06-03 18:38:03,536 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 285 places, 345 transitions, 4428 flow [2024-06-03 18:38:03,994 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 278 places, 345 transitions, 4107 flow, removed 77 selfloop flow, removed 7 redundant places. [2024-06-03 18:38:03,997 INFO L231 Difference]: Finished difference. Result has 279 places, 318 transitions, 3441 flow [2024-06-03 18:38:03,998 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3181, PETRI_DIFFERENCE_MINUEND_PLACES=266, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=312, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=93, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=219, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=3441, PETRI_PLACES=279, PETRI_TRANSITIONS=318} [2024-06-03 18:38:03,998 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 237 predicate places. [2024-06-03 18:38:03,998 INFO L495 AbstractCegarLoop]: Abstraction has has 279 places, 318 transitions, 3441 flow [2024-06-03 18:38:03,998 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:38:03,998 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:38:03,998 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:38:03,998 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2024-06-03 18:38:03,998 INFO L420 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 18:38:03,998 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:38:03,998 INFO L85 PathProgramCache]: Analyzing trace with hash -269129074, now seen corresponding path program 3 times [2024-06-03 18:38:03,999 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:38:03,999 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [401661152] [2024-06-03 18:38:03,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:38:03,999 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:38:04,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:38:04,141 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:38:04,141 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:38:04,141 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [401661152] [2024-06-03 18:38:04,141 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [401661152] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:38:04,141 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:38:04,141 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 18:38:04,142 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [374789202] [2024-06-03 18:38:04,142 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:38:04,142 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 18:38:04,142 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:38:04,142 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 18:38:04,142 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-03 18:38:04,191 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 18:38:04,191 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 279 places, 318 transitions, 3441 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:38:04,191 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:38:04,191 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 18:38:04,191 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:38:04,735 INFO L124 PetriNetUnfolderBase]: 1746/2951 cut-off events. [2024-06-03 18:38:04,735 INFO L125 PetriNetUnfolderBase]: For 128625/128637 co-relation queries the response was YES. [2024-06-03 18:38:04,755 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18043 conditions, 2951 events. 1746/2951 cut-off events. For 128625/128637 co-relation queries the response was YES. Maximal size of possible extension queue 241. Compared 17654 event pairs, 380 based on Foata normal form. 13/2964 useless extension candidates. Maximal degree in co-relation 17914. Up to 2539 conditions per place. [2024-06-03 18:38:04,766 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 241 selfloop transitions, 96 changer transitions 0/343 dead transitions. [2024-06-03 18:38:04,766 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 290 places, 343 transitions, 4175 flow [2024-06-03 18:38:04,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-03 18:38:04,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-03 18:38:04,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 246 transitions. [2024-06-03 18:38:04,767 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-06-03 18:38:04,767 INFO L175 Difference]: Start difference. First operand has 279 places, 318 transitions, 3441 flow. Second operand 12 states and 246 transitions. [2024-06-03 18:38:04,767 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 290 places, 343 transitions, 4175 flow [2024-06-03 18:38:05,296 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 281 places, 343 transitions, 4028 flow, removed 16 selfloop flow, removed 9 redundant places. [2024-06-03 18:38:05,300 INFO L231 Difference]: Finished difference. Result has 282 places, 318 transitions, 3492 flow [2024-06-03 18:38:05,300 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3294, PETRI_DIFFERENCE_MINUEND_PLACES=270, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=318, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=96, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=222, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=3492, PETRI_PLACES=282, PETRI_TRANSITIONS=318} [2024-06-03 18:38:05,300 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 240 predicate places. [2024-06-03 18:38:05,300 INFO L495 AbstractCegarLoop]: Abstraction has has 282 places, 318 transitions, 3492 flow [2024-06-03 18:38:05,301 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:38:05,301 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:38:05,301 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:38:05,301 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2024-06-03 18:38:05,301 INFO L420 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 18:38:05,301 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:38:05,301 INFO L85 PathProgramCache]: Analyzing trace with hash 934337980, now seen corresponding path program 4 times [2024-06-03 18:38:05,301 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:38:05,301 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [760871910] [2024-06-03 18:38:05,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:38:05,301 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:38:05,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:38:05,431 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:38:05,432 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:38:05,432 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [760871910] [2024-06-03 18:38:05,432 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [760871910] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:38:05,432 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:38:05,432 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 18:38:05,432 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [629843592] [2024-06-03 18:38:05,432 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:38:05,432 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 18:38:05,432 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:38:05,432 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 18:38:05,432 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-03 18:38:05,481 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 18:38:05,482 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 282 places, 318 transitions, 3492 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:38:05,482 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:38:05,482 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 18:38:05,482 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:38:05,957 INFO L124 PetriNetUnfolderBase]: 1767/2986 cut-off events. [2024-06-03 18:38:05,958 INFO L125 PetriNetUnfolderBase]: For 136502/136514 co-relation queries the response was YES. [2024-06-03 18:38:05,977 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18547 conditions, 2986 events. 1767/2986 cut-off events. For 136502/136514 co-relation queries the response was YES. Maximal size of possible extension queue 245. Compared 17825 event pairs, 380 based on Foata normal form. 13/2999 useless extension candidates. Maximal degree in co-relation 18416. Up to 2547 conditions per place. [2024-06-03 18:38:05,987 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 236 selfloop transitions, 108 changer transitions 0/350 dead transitions. [2024-06-03 18:38:05,987 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 293 places, 350 transitions, 4470 flow [2024-06-03 18:38:05,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-03 18:38:05,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-03 18:38:05,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 244 transitions. [2024-06-03 18:38:05,988 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4959349593495935 [2024-06-03 18:38:05,988 INFO L175 Difference]: Start difference. First operand has 282 places, 318 transitions, 3492 flow. Second operand 12 states and 244 transitions. [2024-06-03 18:38:05,988 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 293 places, 350 transitions, 4470 flow [2024-06-03 18:38:06,530 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 282 places, 350 transitions, 4278 flow, removed 0 selfloop flow, removed 11 redundant places. [2024-06-03 18:38:06,534 INFO L231 Difference]: Finished difference. Result has 284 places, 327 transitions, 3656 flow [2024-06-03 18:38:06,534 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3300, PETRI_DIFFERENCE_MINUEND_PLACES=271, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=318, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=102, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=213, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=3656, PETRI_PLACES=284, PETRI_TRANSITIONS=327} [2024-06-03 18:38:06,535 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 242 predicate places. [2024-06-03 18:38:06,535 INFO L495 AbstractCegarLoop]: Abstraction has has 284 places, 327 transitions, 3656 flow [2024-06-03 18:38:06,535 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:38:06,535 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:38:06,535 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:38:06,535 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2024-06-03 18:38:06,535 INFO L420 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 18:38:06,535 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:38:06,536 INFO L85 PathProgramCache]: Analyzing trace with hash 926986330, now seen corresponding path program 5 times [2024-06-03 18:38:06,536 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:38:06,536 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [432493369] [2024-06-03 18:38:06,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:38:06,536 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:38:06,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:38:06,662 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:38:06,662 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:38:06,662 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [432493369] [2024-06-03 18:38:06,662 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [432493369] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:38:06,662 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:38:06,662 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 18:38:06,662 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [572951387] [2024-06-03 18:38:06,663 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:38:06,663 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 18:38:06,663 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:38:06,663 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 18:38:06,663 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-03 18:38:06,706 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 18:38:06,706 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 284 places, 327 transitions, 3656 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:38:06,706 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:38:06,706 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 18:38:06,706 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:38:07,253 INFO L124 PetriNetUnfolderBase]: 1772/2995 cut-off events. [2024-06-03 18:38:07,253 INFO L125 PetriNetUnfolderBase]: For 140449/140461 co-relation queries the response was YES. [2024-06-03 18:38:07,274 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18741 conditions, 2995 events. 1772/2995 cut-off events. For 140449/140461 co-relation queries the response was YES. Maximal size of possible extension queue 247. Compared 17945 event pairs, 380 based on Foata normal form. 13/3008 useless extension candidates. Maximal degree in co-relation 18608. Up to 2553 conditions per place. [2024-06-03 18:38:07,284 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 241 selfloop transitions, 110 changer transitions 0/357 dead transitions. [2024-06-03 18:38:07,284 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 298 places, 357 transitions, 4731 flow [2024-06-03 18:38:07,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-06-03 18:38:07,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2024-06-03 18:38:07,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 298 transitions. [2024-06-03 18:38:07,285 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4845528455284553 [2024-06-03 18:38:07,285 INFO L175 Difference]: Start difference. First operand has 284 places, 327 transitions, 3656 flow. Second operand 15 states and 298 transitions. [2024-06-03 18:38:07,285 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 298 places, 357 transitions, 4731 flow [2024-06-03 18:38:07,957 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 290 places, 357 transitions, 4578 flow, removed 18 selfloop flow, removed 8 redundant places. [2024-06-03 18:38:07,961 INFO L231 Difference]: Finished difference. Result has 291 places, 330 transitions, 3772 flow [2024-06-03 18:38:07,962 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3503, PETRI_DIFFERENCE_MINUEND_PLACES=276, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=327, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=107, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=220, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=3772, PETRI_PLACES=291, PETRI_TRANSITIONS=330} [2024-06-03 18:38:07,962 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 249 predicate places. [2024-06-03 18:38:07,962 INFO L495 AbstractCegarLoop]: Abstraction has has 291 places, 330 transitions, 3772 flow [2024-06-03 18:38:07,962 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:38:07,962 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:38:07,962 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:38:07,962 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2024-06-03 18:38:07,962 INFO L420 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 18:38:07,963 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:38:07,963 INFO L85 PathProgramCache]: Analyzing trace with hash 926980750, now seen corresponding path program 6 times [2024-06-03 18:38:07,963 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:38:07,963 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1227213892] [2024-06-03 18:38:07,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:38:07,963 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:38:07,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:38:08,091 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:38:08,092 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:38:08,092 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1227213892] [2024-06-03 18:38:08,092 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1227213892] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:38:08,092 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:38:08,092 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 18:38:08,092 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1986151081] [2024-06-03 18:38:08,092 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:38:08,092 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 18:38:08,092 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:38:08,092 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 18:38:08,092 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-03 18:38:08,137 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 18:38:08,138 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 291 places, 330 transitions, 3772 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:38:08,138 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:38:08,138 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 18:38:08,138 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:38:08,611 INFO L124 PetriNetUnfolderBase]: 1769/2991 cut-off events. [2024-06-03 18:38:08,611 INFO L125 PetriNetUnfolderBase]: For 141822/141834 co-relation queries the response was YES. [2024-06-03 18:38:08,631 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18862 conditions, 2991 events. 1769/2991 cut-off events. For 141822/141834 co-relation queries the response was YES. Maximal size of possible extension queue 247. Compared 17948 event pairs, 380 based on Foata normal form. 13/3004 useless extension candidates. Maximal degree in co-relation 18727. Up to 2550 conditions per place. [2024-06-03 18:38:08,640 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 238 selfloop transitions, 110 changer transitions 0/354 dead transitions. [2024-06-03 18:38:08,640 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 303 places, 354 transitions, 4660 flow [2024-06-03 18:38:08,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-03 18:38:08,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-03 18:38:08,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 263 transitions. [2024-06-03 18:38:08,641 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49343339587242024 [2024-06-03 18:38:08,641 INFO L175 Difference]: Start difference. First operand has 291 places, 330 transitions, 3772 flow. Second operand 13 states and 263 transitions. [2024-06-03 18:38:08,641 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 303 places, 354 transitions, 4660 flow [2024-06-03 18:38:09,239 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 291 places, 354 transitions, 4352 flow, removed 22 selfloop flow, removed 12 redundant places. [2024-06-03 18:38:09,243 INFO L231 Difference]: Finished difference. Result has 292 places, 330 transitions, 3690 flow [2024-06-03 18:38:09,243 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3464, PETRI_DIFFERENCE_MINUEND_PLACES=279, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=330, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=110, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=220, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=3690, PETRI_PLACES=292, PETRI_TRANSITIONS=330} [2024-06-03 18:38:09,243 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 250 predicate places. [2024-06-03 18:38:09,243 INFO L495 AbstractCegarLoop]: Abstraction has has 292 places, 330 transitions, 3690 flow [2024-06-03 18:38:09,243 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:38:09,243 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:38:09,243 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:38:09,243 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2024-06-03 18:38:09,244 INFO L420 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 18:38:09,244 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:38:09,244 INFO L85 PathProgramCache]: Analyzing trace with hash -706216494, now seen corresponding path program 7 times [2024-06-03 18:38:09,244 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:38:09,244 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1478515538] [2024-06-03 18:38:09,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:38:09,244 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:38:09,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:38:09,371 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:38:09,371 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:38:09,371 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1478515538] [2024-06-03 18:38:09,371 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1478515538] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:38:09,371 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:38:09,371 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 18:38:09,371 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1410019693] [2024-06-03 18:38:09,371 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:38:09,371 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 18:38:09,372 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:38:09,372 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 18:38:09,372 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2024-06-03 18:38:09,412 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 18:38:09,413 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 292 places, 330 transitions, 3690 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:38:09,413 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:38:09,413 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 18:38:09,413 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:38:09,868 INFO L124 PetriNetUnfolderBase]: 1782/3012 cut-off events. [2024-06-03 18:38:09,868 INFO L125 PetriNetUnfolderBase]: For 148104/148112 co-relation queries the response was YES. [2024-06-03 18:38:09,889 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18928 conditions, 3012 events. 1782/3012 cut-off events. For 148104/148112 co-relation queries the response was YES. Maximal size of possible extension queue 249. Compared 18049 event pairs, 397 based on Foata normal form. 9/3020 useless extension candidates. Maximal degree in co-relation 18793. Up to 2491 conditions per place. [2024-06-03 18:38:09,899 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 237 selfloop transitions, 116 changer transitions 0/359 dead transitions. [2024-06-03 18:38:09,899 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 299 places, 359 transitions, 4812 flow [2024-06-03 18:38:09,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 18:38:09,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 18:38:09,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 183 transitions. [2024-06-03 18:38:09,899 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5579268292682927 [2024-06-03 18:38:09,899 INFO L175 Difference]: Start difference. First operand has 292 places, 330 transitions, 3690 flow. Second operand 8 states and 183 transitions. [2024-06-03 18:38:09,900 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 299 places, 359 transitions, 4812 flow [2024-06-03 18:38:10,501 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 287 places, 359 transitions, 4592 flow, removed 0 selfloop flow, removed 12 redundant places. [2024-06-03 18:38:10,505 INFO L231 Difference]: Finished difference. Result has 288 places, 336 transitions, 3792 flow [2024-06-03 18:38:10,505 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3470, PETRI_DIFFERENCE_MINUEND_PLACES=280, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=330, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=110, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=220, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3792, PETRI_PLACES=288, PETRI_TRANSITIONS=336} [2024-06-03 18:38:10,505 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 246 predicate places. [2024-06-03 18:38:10,505 INFO L495 AbstractCegarLoop]: Abstraction has has 288 places, 336 transitions, 3792 flow [2024-06-03 18:38:10,506 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:38:10,506 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:38:10,506 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:38:10,506 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2024-06-03 18:38:10,506 INFO L420 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 18:38:10,506 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:38:10,506 INFO L85 PathProgramCache]: Analyzing trace with hash -539982714, now seen corresponding path program 8 times [2024-06-03 18:38:10,506 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:38:10,506 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [990922443] [2024-06-03 18:38:10,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:38:10,506 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:38:10,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:38:10,636 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:38:10,636 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:38:10,636 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [990922443] [2024-06-03 18:38:10,636 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [990922443] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:38:10,636 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:38:10,636 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 18:38:10,637 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [904651454] [2024-06-03 18:38:10,637 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:38:10,637 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 18:38:10,637 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:38:10,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 18:38:10,637 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2024-06-03 18:38:10,680 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 18:38:10,681 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 288 places, 336 transitions, 3792 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:38:10,681 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:38:10,681 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 18:38:10,681 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:38:11,185 INFO L124 PetriNetUnfolderBase]: 1787/3022 cut-off events. [2024-06-03 18:38:11,185 INFO L125 PetriNetUnfolderBase]: For 152371/152383 co-relation queries the response was YES. [2024-06-03 18:38:11,206 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19085 conditions, 3022 events. 1787/3022 cut-off events. For 152371/152383 co-relation queries the response was YES. Maximal size of possible extension queue 250. Compared 18165 event pairs, 380 based on Foata normal form. 13/3035 useless extension candidates. Maximal degree in co-relation 18949. Up to 2497 conditions per place. [2024-06-03 18:38:11,215 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 240 selfloop transitions, 125 changer transitions 0/371 dead transitions. [2024-06-03 18:38:11,216 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 298 places, 371 transitions, 4928 flow [2024-06-03 18:38:11,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-03 18:38:11,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-03 18:38:11,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 242 transitions. [2024-06-03 18:38:11,216 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5365853658536586 [2024-06-03 18:38:11,216 INFO L175 Difference]: Start difference. First operand has 288 places, 336 transitions, 3792 flow. Second operand 11 states and 242 transitions. [2024-06-03 18:38:11,216 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 298 places, 371 transitions, 4928 flow [2024-06-03 18:38:11,823 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 294 places, 371 transitions, 4722 flow, removed 25 selfloop flow, removed 4 redundant places. [2024-06-03 18:38:11,827 INFO L231 Difference]: Finished difference. Result has 295 places, 339 transitions, 3890 flow [2024-06-03 18:38:11,827 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3595, PETRI_DIFFERENCE_MINUEND_PLACES=284, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=336, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=122, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=214, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3890, PETRI_PLACES=295, PETRI_TRANSITIONS=339} [2024-06-03 18:38:11,827 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 253 predicate places. [2024-06-03 18:38:11,828 INFO L495 AbstractCegarLoop]: Abstraction has has 295 places, 339 transitions, 3890 flow [2024-06-03 18:38:11,828 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:38:11,828 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:38:11,828 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:38:11,828 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2024-06-03 18:38:11,828 INFO L420 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 18:38:11,828 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:38:11,828 INFO L85 PathProgramCache]: Analyzing trace with hash -702497424, now seen corresponding path program 9 times [2024-06-03 18:38:11,828 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:38:11,828 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1562270521] [2024-06-03 18:38:11,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:38:11,829 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:38:11,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:38:11,965 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:38:11,965 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:38:11,966 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1562270521] [2024-06-03 18:38:11,966 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1562270521] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:38:11,966 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:38:11,966 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 18:38:11,966 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [874074235] [2024-06-03 18:38:11,966 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:38:11,966 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 18:38:11,966 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:38:11,966 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 18:38:11,966 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-03 18:38:12,015 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 18:38:12,015 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 295 places, 339 transitions, 3890 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:38:12,016 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:38:12,016 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 18:38:12,016 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:38:12,512 INFO L124 PetriNetUnfolderBase]: 1792/3031 cut-off events. [2024-06-03 18:38:12,512 INFO L125 PetriNetUnfolderBase]: For 156798/156810 co-relation queries the response was YES. [2024-06-03 18:38:12,533 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19226 conditions, 3031 events. 1792/3031 cut-off events. For 156798/156810 co-relation queries the response was YES. Maximal size of possible extension queue 251. Compared 18239 event pairs, 380 based on Foata normal form. 13/3044 useless extension candidates. Maximal degree in co-relation 19089. Up to 2638 conditions per place. [2024-06-03 18:38:12,543 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 291 selfloop transitions, 64 changer transitions 0/361 dead transitions. [2024-06-03 18:38:12,543 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 302 places, 361 transitions, 4837 flow [2024-06-03 18:38:12,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 18:38:12,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 18:38:12,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 177 transitions. [2024-06-03 18:38:12,544 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5396341463414634 [2024-06-03 18:38:12,544 INFO L175 Difference]: Start difference. First operand has 295 places, 339 transitions, 3890 flow. Second operand 8 states and 177 transitions. [2024-06-03 18:38:12,544 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 302 places, 361 transitions, 4837 flow [2024-06-03 18:38:13,221 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 293 places, 361 transitions, 4513 flow, removed 16 selfloop flow, removed 9 redundant places. [2024-06-03 18:38:13,225 INFO L231 Difference]: Finished difference. Result has 294 places, 342 transitions, 3749 flow [2024-06-03 18:38:13,225 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3572, PETRI_DIFFERENCE_MINUEND_PLACES=286, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=339, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=278, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3749, PETRI_PLACES=294, PETRI_TRANSITIONS=342} [2024-06-03 18:38:13,225 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 252 predicate places. [2024-06-03 18:38:13,225 INFO L495 AbstractCegarLoop]: Abstraction has has 294 places, 342 transitions, 3749 flow [2024-06-03 18:38:13,226 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:38:13,226 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:38:13,226 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:38:13,226 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2024-06-03 18:38:13,226 INFO L420 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 18:38:13,226 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:38:13,226 INFO L85 PathProgramCache]: Analyzing trace with hash -530728284, now seen corresponding path program 10 times [2024-06-03 18:38:13,226 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:38:13,226 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1695920788] [2024-06-03 18:38:13,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:38:13,226 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:38:13,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:38:13,353 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:38:13,354 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:38:13,354 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1695920788] [2024-06-03 18:38:13,354 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1695920788] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:38:13,354 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:38:13,354 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 18:38:13,354 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1172041841] [2024-06-03 18:38:13,354 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:38:13,354 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 18:38:13,354 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:38:13,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 18:38:13,354 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2024-06-03 18:38:13,423 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 18:38:13,423 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 294 places, 342 transitions, 3749 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:38:13,423 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:38:13,423 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 18:38:13,423 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:38:13,941 INFO L124 PetriNetUnfolderBase]: 1805/3053 cut-off events. [2024-06-03 18:38:13,941 INFO L125 PetriNetUnfolderBase]: For 162332/162344 co-relation queries the response was YES. [2024-06-03 18:38:13,962 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19239 conditions, 3053 events. 1805/3053 cut-off events. For 162332/162344 co-relation queries the response was YES. Maximal size of possible extension queue 253. Compared 18398 event pairs, 380 based on Foata normal form. 13/3066 useless extension candidates. Maximal degree in co-relation 19101. Up to 2518 conditions per place. [2024-06-03 18:38:13,972 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 235 selfloop transitions, 138 changer transitions 0/379 dead transitions. [2024-06-03 18:38:13,972 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 306 places, 379 transitions, 4919 flow [2024-06-03 18:38:13,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-03 18:38:13,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-03 18:38:13,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 275 transitions. [2024-06-03 18:38:13,981 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5159474671669794 [2024-06-03 18:38:13,981 INFO L175 Difference]: Start difference. First operand has 294 places, 342 transitions, 3749 flow. Second operand 13 states and 275 transitions. [2024-06-03 18:38:13,981 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 306 places, 379 transitions, 4919 flow [2024-06-03 18:38:14,749 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 300 places, 379 transitions, 4767 flow, removed 8 selfloop flow, removed 6 redundant places. [2024-06-03 18:38:14,753 INFO L231 Difference]: Finished difference. Result has 301 places, 348 transitions, 3941 flow [2024-06-03 18:38:14,753 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3597, PETRI_DIFFERENCE_MINUEND_PLACES=288, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=342, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=132, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=210, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=3941, PETRI_PLACES=301, PETRI_TRANSITIONS=348} [2024-06-03 18:38:14,753 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 259 predicate places. [2024-06-03 18:38:14,753 INFO L495 AbstractCegarLoop]: Abstraction has has 301 places, 348 transitions, 3941 flow [2024-06-03 18:38:14,753 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:38:14,753 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:38:14,753 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:38:14,753 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2024-06-03 18:38:14,753 INFO L420 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 18:38:14,754 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:38:14,754 INFO L85 PathProgramCache]: Analyzing trace with hash -702491844, now seen corresponding path program 11 times [2024-06-03 18:38:14,754 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:38:14,754 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [145457516] [2024-06-03 18:38:14,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:38:14,754 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:38:14,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:38:14,891 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:38:14,891 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:38:14,891 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [145457516] [2024-06-03 18:38:14,892 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [145457516] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:38:14,892 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:38:14,892 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 18:38:14,892 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [767244551] [2024-06-03 18:38:14,892 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:38:14,892 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 18:38:14,892 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:38:14,892 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 18:38:14,892 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-03 18:38:14,934 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 18:38:14,935 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 301 places, 348 transitions, 3941 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:38:14,935 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:38:14,935 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 18:38:14,935 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:38:15,425 INFO L124 PetriNetUnfolderBase]: 1802/3049 cut-off events. [2024-06-03 18:38:15,425 INFO L125 PetriNetUnfolderBase]: For 164069/164081 co-relation queries the response was YES. [2024-06-03 18:38:15,447 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19367 conditions, 3049 events. 1802/3049 cut-off events. For 164069/164081 co-relation queries the response was YES. Maximal size of possible extension queue 253. Compared 18325 event pairs, 380 based on Foata normal form. 13/3062 useless extension candidates. Maximal degree in co-relation 19228. Up to 2653 conditions per place. [2024-06-03 18:38:15,457 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 296 selfloop transitions, 66 changer transitions 0/368 dead transitions. [2024-06-03 18:38:15,457 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 310 places, 368 transitions, 4713 flow [2024-06-03 18:38:15,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 18:38:15,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 18:38:15,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 209 transitions. [2024-06-03 18:38:15,457 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5097560975609756 [2024-06-03 18:38:15,457 INFO L175 Difference]: Start difference. First operand has 301 places, 348 transitions, 3941 flow. Second operand 10 states and 209 transitions. [2024-06-03 18:38:15,457 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 310 places, 368 transitions, 4713 flow [2024-06-03 18:38:16,133 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 301 places, 368 transitions, 4454 flow, removed 16 selfloop flow, removed 9 redundant places. [2024-06-03 18:38:16,137 INFO L231 Difference]: Finished difference. Result has 302 places, 348 transitions, 3820 flow [2024-06-03 18:38:16,137 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3682, PETRI_DIFFERENCE_MINUEND_PLACES=292, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=348, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=282, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3820, PETRI_PLACES=302, PETRI_TRANSITIONS=348} [2024-06-03 18:38:16,138 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 260 predicate places. [2024-06-03 18:38:16,138 INFO L495 AbstractCegarLoop]: Abstraction has has 302 places, 348 transitions, 3820 flow [2024-06-03 18:38:16,138 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:38:16,138 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:38:16,138 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:38:16,138 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2024-06-03 18:38:16,138 INFO L420 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 18:38:16,138 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:38:16,138 INFO L85 PathProgramCache]: Analyzing trace with hash -530717124, now seen corresponding path program 12 times [2024-06-03 18:38:16,138 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:38:16,139 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1711615209] [2024-06-03 18:38:16,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:38:16,139 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:38:16,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:38:16,266 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:38:16,266 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:38:16,266 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1711615209] [2024-06-03 18:38:16,266 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1711615209] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:38:16,266 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:38:16,266 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 18:38:16,266 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [30455585] [2024-06-03 18:38:16,266 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:38:16,266 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 18:38:16,266 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:38:16,267 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 18:38:16,267 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2024-06-03 18:38:16,321 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 18:38:16,321 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 302 places, 348 transitions, 3820 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:38:16,321 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:38:16,321 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 18:38:16,321 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:38:16,830 INFO L124 PetriNetUnfolderBase]: 1799/3045 cut-off events. [2024-06-03 18:38:16,830 INFO L125 PetriNetUnfolderBase]: For 165002/165014 co-relation queries the response was YES. [2024-06-03 18:38:16,851 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19165 conditions, 3045 events. 1799/3045 cut-off events. For 165002/165014 co-relation queries the response was YES. Maximal size of possible extension queue 253. Compared 18348 event pairs, 380 based on Foata normal form. 13/3058 useless extension candidates. Maximal degree in co-relation 19025. Up to 2512 conditions per place. [2024-06-03 18:38:16,861 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 232 selfloop transitions, 140 changer transitions 0/378 dead transitions. [2024-06-03 18:38:16,861 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 314 places, 378 transitions, 4784 flow [2024-06-03 18:38:16,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-03 18:38:16,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-03 18:38:16,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 272 transitions. [2024-06-03 18:38:16,862 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5103189493433395 [2024-06-03 18:38:16,862 INFO L175 Difference]: Start difference. First operand has 302 places, 348 transitions, 3820 flow. Second operand 13 states and 272 transitions. [2024-06-03 18:38:16,862 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 314 places, 378 transitions, 4784 flow [2024-06-03 18:38:17,569 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 304 places, 378 transitions, 4608 flow, removed 8 selfloop flow, removed 10 redundant places. [2024-06-03 18:38:17,574 INFO L231 Difference]: Finished difference. Result has 305 places, 348 transitions, 3930 flow [2024-06-03 18:38:17,574 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3644, PETRI_DIFFERENCE_MINUEND_PLACES=292, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=348, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=140, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=208, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=3930, PETRI_PLACES=305, PETRI_TRANSITIONS=348} [2024-06-03 18:38:17,574 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 263 predicate places. [2024-06-03 18:38:17,574 INFO L495 AbstractCegarLoop]: Abstraction has has 305 places, 348 transitions, 3930 flow [2024-06-03 18:38:17,574 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:38:17,574 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:38:17,574 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:38:17,574 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2024-06-03 18:38:17,574 INFO L420 AbstractCegarLoop]: === Iteration 98 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 18:38:17,575 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:38:17,575 INFO L85 PathProgramCache]: Analyzing trace with hash -1668125764, now seen corresponding path program 13 times [2024-06-03 18:38:17,575 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:38:17,575 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [427662619] [2024-06-03 18:38:17,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:38:17,575 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:38:17,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:38:17,708 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:38:17,708 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:38:17,708 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [427662619] [2024-06-03 18:38:17,708 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [427662619] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:38:17,708 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:38:17,708 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 18:38:17,708 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1668284347] [2024-06-03 18:38:17,708 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:38:17,709 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 18:38:17,709 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:38:17,709 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 18:38:17,709 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-03 18:38:17,751 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 18:38:17,751 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 305 places, 348 transitions, 3930 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:38:17,751 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:38:17,751 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 18:38:17,751 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:38:18,258 INFO L124 PetriNetUnfolderBase]: 1844/3123 cut-off events. [2024-06-03 18:38:18,258 INFO L125 PetriNetUnfolderBase]: For 178589/178601 co-relation queries the response was YES. [2024-06-03 18:38:18,279 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20024 conditions, 3123 events. 1844/3123 cut-off events. For 178589/178601 co-relation queries the response was YES. Maximal size of possible extension queue 259. Compared 18896 event pairs, 380 based on Foata normal form. 13/3136 useless extension candidates. Maximal degree in co-relation 19883. Up to 2631 conditions per place. [2024-06-03 18:38:18,288 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 274 selfloop transitions, 109 changer transitions 0/389 dead transitions. [2024-06-03 18:38:18,288 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 312 places, 389 transitions, 5297 flow [2024-06-03 18:38:18,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 18:38:18,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 18:38:18,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 184 transitions. [2024-06-03 18:38:18,289 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5609756097560976 [2024-06-03 18:38:18,289 INFO L175 Difference]: Start difference. First operand has 305 places, 348 transitions, 3930 flow. Second operand 8 states and 184 transitions. [2024-06-03 18:38:18,289 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 312 places, 389 transitions, 5297 flow [2024-06-03 18:38:19,103 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 300 places, 389 transitions, 4979 flow, removed 0 selfloop flow, removed 12 redundant places. [2024-06-03 18:38:19,107 INFO L231 Difference]: Finished difference. Result has 302 places, 366 transitions, 4149 flow [2024-06-03 18:38:19,107 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3646, PETRI_DIFFERENCE_MINUEND_PLACES=293, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=348, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=94, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=248, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4149, PETRI_PLACES=302, PETRI_TRANSITIONS=366} [2024-06-03 18:38:19,107 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 260 predicate places. [2024-06-03 18:38:19,107 INFO L495 AbstractCegarLoop]: Abstraction has has 302 places, 366 transitions, 4149 flow [2024-06-03 18:38:19,107 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:38:19,107 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:38:19,107 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:38:19,108 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97 [2024-06-03 18:38:19,108 INFO L420 AbstractCegarLoop]: === Iteration 99 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 18:38:19,108 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:38:19,108 INFO L85 PathProgramCache]: Analyzing trace with hash -1668136924, now seen corresponding path program 14 times [2024-06-03 18:38:19,108 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:38:19,108 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1390006825] [2024-06-03 18:38:19,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:38:19,108 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:38:19,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:38:19,243 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:38:19,243 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:38:19,243 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1390006825] [2024-06-03 18:38:19,243 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1390006825] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:38:19,243 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:38:19,243 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 18:38:19,243 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1203482401] [2024-06-03 18:38:19,243 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:38:19,243 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 18:38:19,244 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:38:19,244 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 18:38:19,244 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-03 18:38:19,290 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 18:38:19,290 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 302 places, 366 transitions, 4149 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:38:19,290 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:38:19,290 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 18:38:19,290 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:38:19,806 INFO L124 PetriNetUnfolderBase]: 1841/3119 cut-off events. [2024-06-03 18:38:19,806 INFO L125 PetriNetUnfolderBase]: For 180081/180093 co-relation queries the response was YES. [2024-06-03 18:38:19,828 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20012 conditions, 3119 events. 1841/3119 cut-off events. For 180081/180093 co-relation queries the response was YES. Maximal size of possible extension queue 259. Compared 18899 event pairs, 380 based on Foata normal form. 13/3132 useless extension candidates. Maximal degree in co-relation 19869. Up to 2628 conditions per place. [2024-06-03 18:38:19,839 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 278 selfloop transitions, 108 changer transitions 0/392 dead transitions. [2024-06-03 18:38:19,839 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 309 places, 392 transitions, 5289 flow [2024-06-03 18:38:19,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 18:38:19,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 18:38:19,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 187 transitions. [2024-06-03 18:38:19,839 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5701219512195121 [2024-06-03 18:38:19,839 INFO L175 Difference]: Start difference. First operand has 302 places, 366 transitions, 4149 flow. Second operand 8 states and 187 transitions. [2024-06-03 18:38:19,840 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 309 places, 392 transitions, 5289 flow [2024-06-03 18:38:20,715 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 306 places, 392 transitions, 5210 flow, removed 8 selfloop flow, removed 3 redundant places. [2024-06-03 18:38:20,719 INFO L231 Difference]: Finished difference. Result has 307 places, 366 transitions, 4292 flow [2024-06-03 18:38:20,719 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4070, PETRI_DIFFERENCE_MINUEND_PLACES=299, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=366, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=108, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=258, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4292, PETRI_PLACES=307, PETRI_TRANSITIONS=366} [2024-06-03 18:38:20,720 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 265 predicate places. [2024-06-03 18:38:20,720 INFO L495 AbstractCegarLoop]: Abstraction has has 307 places, 366 transitions, 4292 flow [2024-06-03 18:38:20,720 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:38:20,720 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:38:20,720 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:38:20,720 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98 [2024-06-03 18:38:20,720 INFO L420 AbstractCegarLoop]: === Iteration 100 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 18:38:20,720 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:38:20,720 INFO L85 PathProgramCache]: Analyzing trace with hash -1667958364, now seen corresponding path program 15 times [2024-06-03 18:38:20,721 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:38:20,721 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1319536508] [2024-06-03 18:38:20,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:38:20,721 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:38:20,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:38:20,861 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:38:20,861 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:38:20,861 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1319536508] [2024-06-03 18:38:20,861 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1319536508] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:38:20,861 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:38:20,861 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 18:38:20,861 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1949288906] [2024-06-03 18:38:20,861 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:38:20,861 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 18:38:20,861 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:38:20,861 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 18:38:20,862 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-03 18:38:20,917 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 18:38:20,917 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 307 places, 366 transitions, 4292 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:38:20,917 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:38:20,917 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 18:38:20,917 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:38:21,505 INFO L124 PetriNetUnfolderBase]: 1846/3128 cut-off events. [2024-06-03 18:38:21,505 INFO L125 PetriNetUnfolderBase]: For 184955/184967 co-relation queries the response was YES. [2024-06-03 18:38:21,524 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20372 conditions, 3128 events. 1846/3128 cut-off events. For 184955/184967 co-relation queries the response was YES. Maximal size of possible extension queue 260. Compared 18935 event pairs, 380 based on Foata normal form. 13/3141 useless extension candidates. Maximal degree in co-relation 20227. Up to 2634 conditions per place. [2024-06-03 18:38:21,532 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 272 selfloop transitions, 117 changer transitions 0/395 dead transitions. [2024-06-03 18:38:21,532 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 317 places, 395 transitions, 5495 flow [2024-06-03 18:38:21,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-03 18:38:21,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-03 18:38:21,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 235 transitions. [2024-06-03 18:38:21,533 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5210643015521065 [2024-06-03 18:38:21,533 INFO L175 Difference]: Start difference. First operand has 307 places, 366 transitions, 4292 flow. Second operand 11 states and 235 transitions. [2024-06-03 18:38:21,533 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 317 places, 395 transitions, 5495 flow [2024-06-03 18:38:22,439 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 312 places, 395 transitions, 5277 flow, removed 8 selfloop flow, removed 5 redundant places. [2024-06-03 18:38:22,444 INFO L231 Difference]: Finished difference. Result has 313 places, 369 transitions, 4369 flow [2024-06-03 18:38:22,444 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4080, PETRI_DIFFERENCE_MINUEND_PLACES=302, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=366, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=114, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=252, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=4369, PETRI_PLACES=313, PETRI_TRANSITIONS=369} [2024-06-03 18:38:22,444 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 271 predicate places. [2024-06-03 18:38:22,445 INFO L495 AbstractCegarLoop]: Abstraction has has 313 places, 369 transitions, 4369 flow [2024-06-03 18:38:22,445 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:38:22,445 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:38:22,445 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:38:22,445 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99 [2024-06-03 18:38:22,445 INFO L420 AbstractCegarLoop]: === Iteration 101 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 18:38:22,445 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:38:22,445 INFO L85 PathProgramCache]: Analyzing trace with hash -1667952784, now seen corresponding path program 16 times [2024-06-03 18:38:22,446 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:38:22,446 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [719008562] [2024-06-03 18:38:22,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:38:22,446 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:38:22,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:38:22,584 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:38:22,584 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:38:22,584 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [719008562] [2024-06-03 18:38:22,584 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [719008562] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:38:22,584 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:38:22,584 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 18:38:22,584 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [649810973] [2024-06-03 18:38:22,585 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:38:22,585 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 18:38:22,585 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:38:22,585 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 18:38:22,585 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-03 18:38:22,663 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 18:38:22,663 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 313 places, 369 transitions, 4369 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:38:22,663 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:38:22,663 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 18:38:22,663 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:38:23,181 INFO L124 PetriNetUnfolderBase]: 1843/3124 cut-off events. [2024-06-03 18:38:23,181 INFO L125 PetriNetUnfolderBase]: For 186216/186228 co-relation queries the response was YES. [2024-06-03 18:38:23,205 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20335 conditions, 3124 events. 1843/3124 cut-off events. For 186216/186228 co-relation queries the response was YES. Maximal size of possible extension queue 260. Compared 18915 event pairs, 380 based on Foata normal form. 13/3137 useless extension candidates. Maximal degree in co-relation 20189. Up to 2631 conditions per place. [2024-06-03 18:38:23,215 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 272 selfloop transitions, 116 changer transitions 0/394 dead transitions. [2024-06-03 18:38:23,215 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 322 places, 394 transitions, 5517 flow [2024-06-03 18:38:23,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 18:38:23,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 18:38:23,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 219 transitions. [2024-06-03 18:38:23,216 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5341463414634147 [2024-06-03 18:38:23,216 INFO L175 Difference]: Start difference. First operand has 313 places, 369 transitions, 4369 flow. Second operand 10 states and 219 transitions. [2024-06-03 18:38:23,216 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 322 places, 394 transitions, 5517 flow [2024-06-03 18:38:24,213 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 316 places, 394 transitions, 5324 flow, removed 19 selfloop flow, removed 6 redundant places. [2024-06-03 18:38:24,218 INFO L231 Difference]: Finished difference. Result has 317 places, 369 transitions, 4414 flow [2024-06-03 18:38:24,218 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4176, PETRI_DIFFERENCE_MINUEND_PLACES=307, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=369, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=116, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=253, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4414, PETRI_PLACES=317, PETRI_TRANSITIONS=369} [2024-06-03 18:38:24,219 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 275 predicate places. [2024-06-03 18:38:24,219 INFO L495 AbstractCegarLoop]: Abstraction has has 317 places, 369 transitions, 4414 flow [2024-06-03 18:38:24,219 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:38:24,219 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:38:24,219 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:38:24,219 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100 [2024-06-03 18:38:24,219 INFO L420 AbstractCegarLoop]: === Iteration 102 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 18:38:24,220 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:38:24,220 INFO L85 PathProgramCache]: Analyzing trace with hash -1668304324, now seen corresponding path program 17 times [2024-06-03 18:38:24,220 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:38:24,220 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2018068255] [2024-06-03 18:38:24,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:38:24,220 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:38:24,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:38:24,355 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:38:24,355 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:38:24,355 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2018068255] [2024-06-03 18:38:24,355 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2018068255] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:38:24,355 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:38:24,355 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 18:38:24,355 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1801037784] [2024-06-03 18:38:24,355 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:38:24,355 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 18:38:24,356 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:38:24,356 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 18:38:24,356 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-03 18:38:24,419 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 18:38:24,419 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 317 places, 369 transitions, 4414 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:38:24,419 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:38:24,419 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 18:38:24,419 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:38:24,934 INFO L124 PetriNetUnfolderBase]: 1840/3120 cut-off events. [2024-06-03 18:38:24,934 INFO L125 PetriNetUnfolderBase]: For 187791/187803 co-relation queries the response was YES. [2024-06-03 18:38:24,958 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20294 conditions, 3120 events. 1840/3120 cut-off events. For 187791/187803 co-relation queries the response was YES. Maximal size of possible extension queue 260. Compared 18890 event pairs, 380 based on Foata normal form. 13/3133 useless extension candidates. Maximal degree in co-relation 20147. Up to 2628 conditions per place. [2024-06-03 18:38:24,967 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 273 selfloop transitions, 117 changer transitions 0/396 dead transitions. [2024-06-03 18:38:24,968 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 326 places, 396 transitions, 5418 flow [2024-06-03 18:38:24,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 18:38:24,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 18:38:24,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 220 transitions. [2024-06-03 18:38:24,970 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5365853658536586 [2024-06-03 18:38:24,970 INFO L175 Difference]: Start difference. First operand has 317 places, 369 transitions, 4414 flow. Second operand 10 states and 220 transitions. [2024-06-03 18:38:24,970 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 326 places, 396 transitions, 5418 flow [2024-06-03 18:38:25,869 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 317 places, 396 transitions, 5133 flow, removed 8 selfloop flow, removed 9 redundant places. [2024-06-03 18:38:25,873 INFO L231 Difference]: Finished difference. Result has 318 places, 369 transitions, 4373 flow [2024-06-03 18:38:25,874 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4129, PETRI_DIFFERENCE_MINUEND_PLACES=308, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=369, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=117, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=252, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4373, PETRI_PLACES=318, PETRI_TRANSITIONS=369} [2024-06-03 18:38:25,874 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 276 predicate places. [2024-06-03 18:38:25,874 INFO L495 AbstractCegarLoop]: Abstraction has has 318 places, 369 transitions, 4373 flow [2024-06-03 18:38:25,874 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:38:25,874 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:38:25,874 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:38:25,874 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101 [2024-06-03 18:38:25,874 INFO L420 AbstractCegarLoop]: === Iteration 103 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 18:38:25,875 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:38:25,875 INFO L85 PathProgramCache]: Analyzing trace with hash -1668309904, now seen corresponding path program 18 times [2024-06-03 18:38:25,875 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:38:25,875 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [678186043] [2024-06-03 18:38:25,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:38:25,875 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:38:25,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:38:26,014 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:38:26,015 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:38:26,015 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [678186043] [2024-06-03 18:38:26,015 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [678186043] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:38:26,015 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:38:26,015 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 18:38:26,015 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1583445857] [2024-06-03 18:38:26,015 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:38:26,015 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 18:38:26,015 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:38:26,015 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 18:38:26,015 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-03 18:38:26,063 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 18:38:26,064 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 318 places, 369 transitions, 4373 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:38:26,064 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:38:26,064 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 18:38:26,064 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:38:26,581 INFO L124 PetriNetUnfolderBase]: 1837/3116 cut-off events. [2024-06-03 18:38:26,581 INFO L125 PetriNetUnfolderBase]: For 188371/188383 co-relation queries the response was YES. [2024-06-03 18:38:26,604 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20217 conditions, 3116 events. 1837/3116 cut-off events. For 188371/188383 co-relation queries the response was YES. Maximal size of possible extension queue 260. Compared 18852 event pairs, 380 based on Foata normal form. 13/3129 useless extension candidates. Maximal degree in co-relation 20069. Up to 2625 conditions per place. [2024-06-03 18:38:26,614 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 279 selfloop transitions, 112 changer transitions 0/397 dead transitions. [2024-06-03 18:38:26,615 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 326 places, 397 transitions, 5225 flow [2024-06-03 18:38:26,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 18:38:26,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 18:38:26,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 206 transitions. [2024-06-03 18:38:26,615 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5582655826558266 [2024-06-03 18:38:26,615 INFO L175 Difference]: Start difference. First operand has 318 places, 369 transitions, 4373 flow. Second operand 9 states and 206 transitions. [2024-06-03 18:38:26,615 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 326 places, 397 transitions, 5225 flow [2024-06-03 18:38:27,594 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 315 places, 397 transitions, 4913 flow, removed 9 selfloop flow, removed 11 redundant places. [2024-06-03 18:38:27,598 INFO L231 Difference]: Finished difference. Result has 316 places, 369 transitions, 4295 flow [2024-06-03 18:38:27,598 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4061, PETRI_DIFFERENCE_MINUEND_PLACES=307, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=369, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=112, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=257, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4295, PETRI_PLACES=316, PETRI_TRANSITIONS=369} [2024-06-03 18:38:27,598 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 274 predicate places. [2024-06-03 18:38:27,598 INFO L495 AbstractCegarLoop]: Abstraction has has 316 places, 369 transitions, 4295 flow [2024-06-03 18:38:27,599 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:38:27,599 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:38:27,599 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:38:27,599 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102 [2024-06-03 18:38:27,599 INFO L420 AbstractCegarLoop]: === Iteration 104 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 18:38:27,599 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:38:27,599 INFO L85 PathProgramCache]: Analyzing trace with hash 501480636, now seen corresponding path program 19 times [2024-06-03 18:38:27,599 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:38:27,599 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [912111156] [2024-06-03 18:38:27,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:38:27,600 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:38:27,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:38:27,726 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:38:27,727 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:38:27,727 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [912111156] [2024-06-03 18:38:27,727 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [912111156] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:38:27,727 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:38:27,727 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 18:38:27,727 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [53501672] [2024-06-03 18:38:27,727 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:38:27,727 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 18:38:27,727 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:38:27,727 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 18:38:27,727 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2024-06-03 18:38:27,773 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 18:38:27,773 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 316 places, 369 transitions, 4295 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:38:27,773 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:38:27,773 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 18:38:27,773 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:38:28,318 INFO L124 PetriNetUnfolderBase]: 1850/3138 cut-off events. [2024-06-03 18:38:28,318 INFO L125 PetriNetUnfolderBase]: For 191426/191438 co-relation queries the response was YES. [2024-06-03 18:38:28,342 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20359 conditions, 3138 events. 1850/3138 cut-off events. For 191426/191438 co-relation queries the response was YES. Maximal size of possible extension queue 262. Compared 19031 event pairs, 380 based on Foata normal form. 13/3151 useless extension candidates. Maximal degree in co-relation 20211. Up to 2561 conditions per place. [2024-06-03 18:38:28,352 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 221 selfloop transitions, 178 changer transitions 0/405 dead transitions. [2024-06-03 18:38:28,352 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 327 places, 405 transitions, 5553 flow [2024-06-03 18:38:28,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-03 18:38:28,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-03 18:38:28,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 255 transitions. [2024-06-03 18:38:28,353 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5182926829268293 [2024-06-03 18:38:28,353 INFO L175 Difference]: Start difference. First operand has 316 places, 369 transitions, 4295 flow. Second operand 12 states and 255 transitions. [2024-06-03 18:38:28,353 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 327 places, 405 transitions, 5553 flow [2024-06-03 18:38:29,297 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 317 places, 405 transitions, 5287 flow, removed 3 selfloop flow, removed 10 redundant places. [2024-06-03 18:38:29,301 INFO L231 Difference]: Finished difference. Result has 318 places, 375 transitions, 4467 flow [2024-06-03 18:38:29,301 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4033, PETRI_DIFFERENCE_MINUEND_PLACES=306, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=369, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=172, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=197, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=4467, PETRI_PLACES=318, PETRI_TRANSITIONS=375} [2024-06-03 18:38:29,302 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 276 predicate places. [2024-06-03 18:38:29,302 INFO L495 AbstractCegarLoop]: Abstraction has has 318 places, 375 transitions, 4467 flow [2024-06-03 18:38:29,302 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:38:29,302 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:38:29,302 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:38:29,302 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103 [2024-06-03 18:38:29,302 INFO L420 AbstractCegarLoop]: === Iteration 105 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 18:38:29,302 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:38:29,302 INFO L85 PathProgramCache]: Analyzing trace with hash 494123406, now seen corresponding path program 20 times [2024-06-03 18:38:29,302 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:38:29,302 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [407202536] [2024-06-03 18:38:29,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:38:29,303 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:38:29,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:38:29,451 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:38:29,451 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:38:29,451 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [407202536] [2024-06-03 18:38:29,451 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [407202536] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:38:29,451 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:38:29,451 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 18:38:29,451 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [254777053] [2024-06-03 18:38:29,451 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:38:29,451 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 18:38:29,452 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:38:29,452 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 18:38:29,452 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2024-06-03 18:38:29,501 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 18:38:29,502 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 318 places, 375 transitions, 4467 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:38:29,502 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:38:29,502 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 18:38:29,502 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:38:30,113 INFO L124 PetriNetUnfolderBase]: 1855/3147 cut-off events. [2024-06-03 18:38:30,114 INFO L125 PetriNetUnfolderBase]: For 191483/191495 co-relation queries the response was YES. [2024-06-03 18:38:30,139 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20545 conditions, 3147 events. 1855/3147 cut-off events. For 191483/191495 co-relation queries the response was YES. Maximal size of possible extension queue 263. Compared 19128 event pairs, 380 based on Foata normal form. 13/3160 useless extension candidates. Maximal degree in co-relation 20397. Up to 2567 conditions per place. [2024-06-03 18:38:30,152 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 225 selfloop transitions, 182 changer transitions 0/413 dead transitions. [2024-06-03 18:38:30,152 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 329 places, 413 transitions, 5567 flow [2024-06-03 18:38:30,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-03 18:38:30,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-03 18:38:30,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 262 transitions. [2024-06-03 18:38:30,153 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.532520325203252 [2024-06-03 18:38:30,153 INFO L175 Difference]: Start difference. First operand has 318 places, 375 transitions, 4467 flow. Second operand 12 states and 262 transitions. [2024-06-03 18:38:30,153 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 329 places, 413 transitions, 5567 flow [2024-06-03 18:38:31,248 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 320 places, 413 transitions, 5285 flow, removed 10 selfloop flow, removed 9 redundant places. [2024-06-03 18:38:31,252 INFO L231 Difference]: Finished difference. Result has 321 places, 378 transitions, 4605 flow [2024-06-03 18:38:31,252 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4190, PETRI_DIFFERENCE_MINUEND_PLACES=309, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=375, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=179, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=196, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=4605, PETRI_PLACES=321, PETRI_TRANSITIONS=378} [2024-06-03 18:38:31,252 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 279 predicate places. [2024-06-03 18:38:31,252 INFO L495 AbstractCegarLoop]: Abstraction has has 321 places, 378 transitions, 4605 flow [2024-06-03 18:38:31,252 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:38:31,252 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:38:31,252 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:38:31,253 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104 [2024-06-03 18:38:31,253 INFO L420 AbstractCegarLoop]: === Iteration 106 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 18:38:31,253 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:38:31,253 INFO L85 PathProgramCache]: Analyzing trace with hash 833948196, now seen corresponding path program 21 times [2024-06-03 18:38:31,253 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:38:31,253 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2101890418] [2024-06-03 18:38:31,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:38:31,253 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:38:31,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:38:31,381 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:38:31,381 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:38:31,381 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2101890418] [2024-06-03 18:38:31,381 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2101890418] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:38:31,381 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:38:31,381 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 18:38:31,381 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2146443207] [2024-06-03 18:38:31,381 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:38:31,381 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 18:38:31,381 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:38:31,381 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 18:38:31,381 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2024-06-03 18:38:31,428 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 18:38:31,428 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 321 places, 378 transitions, 4605 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:38:31,428 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:38:31,428 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 18:38:31,428 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:38:31,926 INFO L124 PetriNetUnfolderBase]: 1852/3141 cut-off events. [2024-06-03 18:38:31,927 INFO L125 PetriNetUnfolderBase]: For 188938/188942 co-relation queries the response was YES. [2024-06-03 18:38:31,950 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20500 conditions, 3141 events. 1852/3141 cut-off events. For 188938/188942 co-relation queries the response was YES. Maximal size of possible extension queue 263. Compared 19080 event pairs, 402 based on Foata normal form. 5/3145 useless extension candidates. Maximal degree in co-relation 20352. Up to 2564 conditions per place. [2024-06-03 18:38:31,960 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 214 selfloop transitions, 176 changer transitions 0/396 dead transitions. [2024-06-03 18:38:31,960 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 330 places, 396 transitions, 5587 flow [2024-06-03 18:38:31,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 18:38:31,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 18:38:31,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 210 transitions. [2024-06-03 18:38:31,961 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5121951219512195 [2024-06-03 18:38:31,961 INFO L175 Difference]: Start difference. First operand has 321 places, 378 transitions, 4605 flow. Second operand 10 states and 210 transitions. [2024-06-03 18:38:31,961 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 330 places, 396 transitions, 5587 flow [2024-06-03 18:38:33,041 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 319 places, 396 transitions, 5227 flow, removed 20 selfloop flow, removed 11 redundant places. [2024-06-03 18:38:33,045 INFO L231 Difference]: Finished difference. Result has 320 places, 378 transitions, 4607 flow [2024-06-03 18:38:33,045 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4249, PETRI_DIFFERENCE_MINUEND_PLACES=310, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=378, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=176, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=202, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4607, PETRI_PLACES=320, PETRI_TRANSITIONS=378} [2024-06-03 18:38:33,045 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 278 predicate places. [2024-06-03 18:38:33,046 INFO L495 AbstractCegarLoop]: Abstraction has has 320 places, 378 transitions, 4607 flow [2024-06-03 18:38:33,046 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:38:33,046 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:38:33,046 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:38:33,046 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105 [2024-06-03 18:38:33,046 INFO L420 AbstractCegarLoop]: === Iteration 107 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 18:38:33,046 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:38:33,047 INFO L85 PathProgramCache]: Analyzing trace with hash 494128986, now seen corresponding path program 22 times [2024-06-03 18:38:33,047 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:38:33,047 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1419158651] [2024-06-03 18:38:33,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:38:33,047 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:38:33,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:38:33,179 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:38:33,180 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:38:33,180 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1419158651] [2024-06-03 18:38:33,180 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1419158651] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:38:33,180 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:38:33,180 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 18:38:33,180 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [966842857] [2024-06-03 18:38:33,180 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:38:33,180 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 18:38:33,180 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:38:33,180 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 18:38:33,181 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2024-06-03 18:38:33,217 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 18:38:33,218 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 320 places, 378 transitions, 4607 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:38:33,218 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:38:33,218 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 18:38:33,218 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:38:33,818 INFO L124 PetriNetUnfolderBase]: 1849/3139 cut-off events. [2024-06-03 18:38:33,818 INFO L125 PetriNetUnfolderBase]: For 181317/181329 co-relation queries the response was YES. [2024-06-03 18:38:33,842 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20308 conditions, 3139 events. 1849/3139 cut-off events. For 181317/181329 co-relation queries the response was YES. Maximal size of possible extension queue 263. Compared 19062 event pairs, 380 based on Foata normal form. 13/3152 useless extension candidates. Maximal degree in co-relation 20161. Up to 2561 conditions per place. [2024-06-03 18:38:33,852 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 226 selfloop transitions, 182 changer transitions 0/414 dead transitions. [2024-06-03 18:38:33,852 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 333 places, 414 transitions, 5511 flow [2024-06-03 18:38:33,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-06-03 18:38:33,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-06-03 18:38:33,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 295 transitions. [2024-06-03 18:38:33,853 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5139372822299652 [2024-06-03 18:38:33,853 INFO L175 Difference]: Start difference. First operand has 320 places, 378 transitions, 4607 flow. Second operand 14 states and 295 transitions. [2024-06-03 18:38:33,853 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 333 places, 414 transitions, 5511 flow [2024-06-03 18:38:34,883 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 324 places, 414 transitions, 5089 flow, removed 11 selfloop flow, removed 9 redundant places. [2024-06-03 18:38:34,887 INFO L231 Difference]: Finished difference. Result has 325 places, 378 transitions, 4563 flow [2024-06-03 18:38:34,887 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4185, PETRI_DIFFERENCE_MINUEND_PLACES=311, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=378, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=182, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=196, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=4563, PETRI_PLACES=325, PETRI_TRANSITIONS=378} [2024-06-03 18:38:34,887 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 283 predicate places. [2024-06-03 18:38:34,887 INFO L495 AbstractCegarLoop]: Abstraction has has 325 places, 378 transitions, 4563 flow [2024-06-03 18:38:34,888 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:38:34,888 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:38:34,888 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:38:34,888 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106 [2024-06-03 18:38:34,888 INFO L420 AbstractCegarLoop]: === Iteration 108 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 18:38:34,888 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:38:34,888 INFO L85 PathProgramCache]: Analyzing trace with hash 1764753694, now seen corresponding path program 23 times [2024-06-03 18:38:34,889 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:38:34,889 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [254466302] [2024-06-03 18:38:34,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:38:34,889 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:38:34,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:38:34,998 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:38:34,998 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:38:34,999 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [254466302] [2024-06-03 18:38:34,999 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [254466302] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:38:34,999 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:38:34,999 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 18:38:34,999 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [813527840] [2024-06-03 18:38:34,999 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:38:34,999 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 18:38:34,999 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:38:35,000 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 18:38:35,000 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2024-06-03 18:38:35,038 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 18:38:35,038 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 325 places, 378 transitions, 4563 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:38:35,038 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:38:35,038 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 18:38:35,038 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:38:35,538 INFO L124 PetriNetUnfolderBase]: 1862/3161 cut-off events. [2024-06-03 18:38:35,539 INFO L125 PetriNetUnfolderBase]: For 188822/188834 co-relation queries the response was YES. [2024-06-03 18:38:35,563 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20596 conditions, 3161 events. 1862/3161 cut-off events. For 188822/188834 co-relation queries the response was YES. Maximal size of possible extension queue 265. Compared 19214 event pairs, 386 based on Foata normal form. 13/3174 useless extension candidates. Maximal degree in co-relation 20448. Up to 2549 conditions per place. [2024-06-03 18:38:35,573 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 229 selfloop transitions, 178 changer transitions 0/413 dead transitions. [2024-06-03 18:38:35,573 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 336 places, 413 transitions, 5719 flow [2024-06-03 18:38:35,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-03 18:38:35,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-03 18:38:35,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 254 transitions. [2024-06-03 18:38:35,574 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.516260162601626 [2024-06-03 18:38:35,574 INFO L175 Difference]: Start difference. First operand has 325 places, 378 transitions, 4563 flow. Second operand 12 states and 254 transitions. [2024-06-03 18:38:35,574 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 336 places, 413 transitions, 5719 flow [2024-06-03 18:38:36,635 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 319 places, 413 transitions, 5231 flow, removed 4 selfloop flow, removed 17 redundant places. [2024-06-03 18:38:36,639 INFO L231 Difference]: Finished difference. Result has 320 places, 384 transitions, 4559 flow [2024-06-03 18:38:36,639 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4079, PETRI_DIFFERENCE_MINUEND_PLACES=308, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=378, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=175, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=203, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=4559, PETRI_PLACES=320, PETRI_TRANSITIONS=384} [2024-06-03 18:38:36,640 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 278 predicate places. [2024-06-03 18:38:36,640 INFO L495 AbstractCegarLoop]: Abstraction has has 320 places, 384 transitions, 4559 flow [2024-06-03 18:38:36,640 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:38:36,640 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:38:36,640 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:38:36,640 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107 [2024-06-03 18:38:36,640 INFO L420 AbstractCegarLoop]: === Iteration 109 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 18:38:36,640 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:38:36,640 INFO L85 PathProgramCache]: Analyzing trace with hash -376154332, now seen corresponding path program 24 times [2024-06-03 18:38:36,641 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:38:36,641 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [875985281] [2024-06-03 18:38:36,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:38:36,641 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:38:36,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:38:36,777 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:38:36,778 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:38:36,778 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [875985281] [2024-06-03 18:38:36,778 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [875985281] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:38:36,778 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:38:36,778 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 18:38:36,778 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2014165093] [2024-06-03 18:38:36,778 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:38:36,778 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 18:38:36,778 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:38:36,779 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 18:38:36,779 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-03 18:38:36,833 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 18:38:36,834 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 320 places, 384 transitions, 4559 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:38:36,834 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:38:36,834 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 18:38:36,834 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:38:37,387 INFO L124 PetriNetUnfolderBase]: 1867/3170 cut-off events. [2024-06-03 18:38:37,387 INFO L125 PetriNetUnfolderBase]: For 186828/186840 co-relation queries the response was YES. [2024-06-03 18:38:37,411 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20835 conditions, 3170 events. 1867/3170 cut-off events. For 186828/186840 co-relation queries the response was YES. Maximal size of possible extension queue 266. Compared 19290 event pairs, 380 based on Foata normal form. 13/3183 useless extension candidates. Maximal degree in co-relation 20688. Up to 2703 conditions per place. [2024-06-03 18:38:37,421 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 337 selfloop transitions, 74 changer transitions 0/417 dead transitions. [2024-06-03 18:38:37,421 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 329 places, 417 transitions, 5659 flow [2024-06-03 18:38:37,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 18:38:37,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 18:38:37,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 219 transitions. [2024-06-03 18:38:37,422 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5341463414634147 [2024-06-03 18:38:37,422 INFO L175 Difference]: Start difference. First operand has 320 places, 384 transitions, 4559 flow. Second operand 10 states and 219 transitions. [2024-06-03 18:38:37,422 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 329 places, 417 transitions, 5659 flow [2024-06-03 18:38:38,434 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 321 places, 417 transitions, 5432 flow, removed 35 selfloop flow, removed 8 redundant places. [2024-06-03 18:38:38,438 INFO L231 Difference]: Finished difference. Result has 322 places, 387 transitions, 4532 flow [2024-06-03 18:38:38,439 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4332, PETRI_DIFFERENCE_MINUEND_PLACES=312, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=384, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=313, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4532, PETRI_PLACES=322, PETRI_TRANSITIONS=387} [2024-06-03 18:38:38,439 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 280 predicate places. [2024-06-03 18:38:38,439 INFO L495 AbstractCegarLoop]: Abstraction has has 322 places, 387 transitions, 4532 flow [2024-06-03 18:38:38,439 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:38:38,439 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:38:38,439 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:38:38,439 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108 [2024-06-03 18:38:38,439 INFO L420 AbstractCegarLoop]: === Iteration 110 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 18:38:38,439 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:38:38,439 INFO L85 PathProgramCache]: Analyzing trace with hash -1804231104, now seen corresponding path program 25 times [2024-06-03 18:38:38,439 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:38:38,440 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [973080265] [2024-06-03 18:38:38,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:38:38,440 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:38:38,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:38:38,576 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:38:38,576 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:38:38,576 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [973080265] [2024-06-03 18:38:38,576 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [973080265] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:38:38,576 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:38:38,576 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 18:38:38,576 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [37506745] [2024-06-03 18:38:38,576 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:38:38,576 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 18:38:38,576 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:38:38,577 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 18:38:38,577 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-03 18:38:38,621 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 18:38:38,621 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 322 places, 387 transitions, 4532 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:38:38,621 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:38:38,621 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 18:38:38,621 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:38:39,188 INFO L124 PetriNetUnfolderBase]: 1864/3166 cut-off events. [2024-06-03 18:38:39,188 INFO L125 PetriNetUnfolderBase]: For 187357/187369 co-relation queries the response was YES. [2024-06-03 18:38:39,210 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20849 conditions, 3166 events. 1864/3166 cut-off events. For 187357/187369 co-relation queries the response was YES. Maximal size of possible extension queue 266. Compared 19238 event pairs, 380 based on Foata normal form. 13/3179 useless extension candidates. Maximal degree in co-relation 20700. Up to 2700 conditions per place. [2024-06-03 18:38:39,220 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 333 selfloop transitions, 72 changer transitions 0/411 dead transitions. [2024-06-03 18:38:39,220 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 329 places, 411 transitions, 5402 flow [2024-06-03 18:38:39,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 18:38:39,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 18:38:39,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 182 transitions. [2024-06-03 18:38:39,221 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5548780487804879 [2024-06-03 18:38:39,221 INFO L175 Difference]: Start difference. First operand has 322 places, 387 transitions, 4532 flow. Second operand 8 states and 182 transitions. [2024-06-03 18:38:39,221 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 329 places, 411 transitions, 5402 flow [2024-06-03 18:38:40,145 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 318 places, 411 transitions, 4901 flow, removed 28 selfloop flow, removed 11 redundant places. [2024-06-03 18:38:40,150 INFO L231 Difference]: Finished difference. Result has 319 places, 387 transitions, 4181 flow [2024-06-03 18:38:40,150 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4031, PETRI_DIFFERENCE_MINUEND_PLACES=311, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=387, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=315, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4181, PETRI_PLACES=319, PETRI_TRANSITIONS=387} [2024-06-03 18:38:40,150 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 277 predicate places. [2024-06-03 18:38:40,150 INFO L495 AbstractCegarLoop]: Abstraction has has 319 places, 387 transitions, 4181 flow [2024-06-03 18:38:40,150 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:38:40,150 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:38:40,150 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:38:40,150 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109 [2024-06-03 18:38:40,150 INFO L420 AbstractCegarLoop]: === Iteration 111 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 18:38:40,150 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:38:40,151 INFO L85 PathProgramCache]: Analyzing trace with hash -363256162, now seen corresponding path program 26 times [2024-06-03 18:38:40,151 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:38:40,151 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1790616480] [2024-06-03 18:38:40,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:38:40,151 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:38:40,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:38:40,277 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:38:40,277 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:38:40,277 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1790616480] [2024-06-03 18:38:40,277 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1790616480] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:38:40,277 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:38:40,277 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 18:38:40,277 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1385078853] [2024-06-03 18:38:40,277 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:38:40,278 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 18:38:40,278 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:38:40,278 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 18:38:40,278 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2024-06-03 18:38:40,337 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 18:38:40,338 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 319 places, 387 transitions, 4181 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:38:40,338 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:38:40,338 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 18:38:40,338 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:38:40,845 INFO L124 PetriNetUnfolderBase]: 1869/3175 cut-off events. [2024-06-03 18:38:40,845 INFO L125 PetriNetUnfolderBase]: For 190541/190553 co-relation queries the response was YES. [2024-06-03 18:38:40,868 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20501 conditions, 3175 events. 1869/3175 cut-off events. For 190541/190553 co-relation queries the response was YES. Maximal size of possible extension queue 267. Compared 19330 event pairs, 386 based on Foata normal form. 13/3188 useless extension candidates. Maximal degree in co-relation 20353. Up to 2603 conditions per place. [2024-06-03 18:38:40,878 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 261 selfloop transitions, 145 changer transitions 0/412 dead transitions. [2024-06-03 18:38:40,878 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 326 places, 412 transitions, 5251 flow [2024-06-03 18:38:40,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 18:38:40,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 18:38:40,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 182 transitions. [2024-06-03 18:38:40,879 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5548780487804879 [2024-06-03 18:38:40,879 INFO L175 Difference]: Start difference. First operand has 319 places, 387 transitions, 4181 flow. Second operand 8 states and 182 transitions. [2024-06-03 18:38:40,879 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 326 places, 412 transitions, 5251 flow [2024-06-03 18:38:41,866 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 319 places, 412 transitions, 5107 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-06-03 18:38:41,870 INFO L231 Difference]: Finished difference. Result has 320 places, 390 transitions, 4375 flow [2024-06-03 18:38:41,870 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4037, PETRI_DIFFERENCE_MINUEND_PLACES=312, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=387, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=142, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=245, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4375, PETRI_PLACES=320, PETRI_TRANSITIONS=390} [2024-06-03 18:38:41,871 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 278 predicate places. [2024-06-03 18:38:41,871 INFO L495 AbstractCegarLoop]: Abstraction has has 320 places, 390 transitions, 4375 flow [2024-06-03 18:38:41,871 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:38:41,871 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:38:41,871 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:38:41,871 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110 [2024-06-03 18:38:41,871 INFO L420 AbstractCegarLoop]: === Iteration 112 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 18:38:41,871 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:38:41,871 INFO L85 PathProgramCache]: Analyzing trace with hash -1798493934, now seen corresponding path program 27 times [2024-06-03 18:38:41,871 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:38:41,871 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1276572560] [2024-06-03 18:38:41,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:38:41,872 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:38:41,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:38:41,996 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:38:41,996 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:38:41,996 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1276572560] [2024-06-03 18:38:41,996 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1276572560] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:38:41,996 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:38:41,996 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 18:38:41,997 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [591614382] [2024-06-03 18:38:41,997 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:38:41,997 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 18:38:41,997 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:38:41,997 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 18:38:41,997 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2024-06-03 18:38:42,038 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 18:38:42,038 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 320 places, 390 transitions, 4375 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:38:42,038 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:38:42,038 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 18:38:42,038 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:38:42,557 INFO L124 PetriNetUnfolderBase]: 1874/3184 cut-off events. [2024-06-03 18:38:42,557 INFO L125 PetriNetUnfolderBase]: For 195313/195325 co-relation queries the response was YES. [2024-06-03 18:38:42,582 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20762 conditions, 3184 events. 1874/3184 cut-off events. For 195313/195325 co-relation queries the response was YES. Maximal size of possible extension queue 268. Compared 19406 event pairs, 380 based on Foata normal form. 13/3197 useless extension candidates. Maximal degree in co-relation 20613. Up to 2609 conditions per place. [2024-06-03 18:38:42,594 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 256 selfloop transitions, 156 changer transitions 0/418 dead transitions. [2024-06-03 18:38:42,594 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 330 places, 418 transitions, 5471 flow [2024-06-03 18:38:42,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-03 18:38:42,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-03 18:38:42,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 235 transitions. [2024-06-03 18:38:42,595 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5210643015521065 [2024-06-03 18:38:42,595 INFO L175 Difference]: Start difference. First operand has 320 places, 390 transitions, 4375 flow. Second operand 11 states and 235 transitions. [2024-06-03 18:38:42,595 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 330 places, 418 transitions, 5471 flow [2024-06-03 18:38:43,456 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 325 places, 418 transitions, 5222 flow, removed 15 selfloop flow, removed 5 redundant places. [2024-06-03 18:38:43,460 INFO L231 Difference]: Finished difference. Result has 326 places, 393 transitions, 4492 flow [2024-06-03 18:38:43,460 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4129, PETRI_DIFFERENCE_MINUEND_PLACES=315, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=390, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=153, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=237, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=4492, PETRI_PLACES=326, PETRI_TRANSITIONS=393} [2024-06-03 18:38:43,461 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 284 predicate places. [2024-06-03 18:38:43,461 INFO L495 AbstractCegarLoop]: Abstraction has has 326 places, 393 transitions, 4492 flow [2024-06-03 18:38:43,461 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:38:43,461 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:38:43,461 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:38:43,461 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111 [2024-06-03 18:38:43,461 INFO L420 AbstractCegarLoop]: === Iteration 113 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 18:38:43,461 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:38:43,462 INFO L85 PathProgramCache]: Analyzing trace with hash -1798701324, now seen corresponding path program 28 times [2024-06-03 18:38:43,462 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:38:43,462 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [50541920] [2024-06-03 18:38:43,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:38:43,462 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:38:43,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:38:43,599 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:38:43,599 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:38:43,599 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [50541920] [2024-06-03 18:38:43,599 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [50541920] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:38:43,599 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:38:43,600 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 18:38:43,600 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1675792309] [2024-06-03 18:38:43,600 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:38:43,600 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 18:38:43,600 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:38:43,600 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 18:38:43,600 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2024-06-03 18:38:43,658 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 18:38:43,658 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 326 places, 393 transitions, 4492 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:38:43,658 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:38:43,658 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 18:38:43,658 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:38:44,216 INFO L124 PetriNetUnfolderBase]: 1879/3193 cut-off events. [2024-06-03 18:38:44,216 INFO L125 PetriNetUnfolderBase]: For 200276/200288 co-relation queries the response was YES. [2024-06-03 18:38:44,241 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20904 conditions, 3193 events. 1879/3193 cut-off events. For 200276/200288 co-relation queries the response was YES. Maximal size of possible extension queue 269. Compared 19494 event pairs, 380 based on Foata normal form. 13/3206 useless extension candidates. Maximal degree in co-relation 20754. Up to 2615 conditions per place. [2024-06-03 18:38:44,252 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 253 selfloop transitions, 164 changer transitions 0/423 dead transitions. [2024-06-03 18:38:44,253 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 338 places, 423 transitions, 5607 flow [2024-06-03 18:38:44,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-03 18:38:44,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-03 18:38:44,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 269 transitions. [2024-06-03 18:38:44,253 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5046904315196998 [2024-06-03 18:38:44,253 INFO L175 Difference]: Start difference. First operand has 326 places, 393 transitions, 4492 flow. Second operand 13 states and 269 transitions. [2024-06-03 18:38:44,253 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 338 places, 423 transitions, 5607 flow [2024-06-03 18:38:45,304 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 329 places, 423 transitions, 5203 flow, removed 23 selfloop flow, removed 9 redundant places. [2024-06-03 18:38:45,308 INFO L231 Difference]: Finished difference. Result has 330 places, 396 transitions, 4473 flow [2024-06-03 18:38:45,308 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4102, PETRI_DIFFERENCE_MINUEND_PLACES=317, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=393, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=161, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=232, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=4473, PETRI_PLACES=330, PETRI_TRANSITIONS=396} [2024-06-03 18:38:45,308 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 288 predicate places. [2024-06-03 18:38:45,308 INFO L495 AbstractCegarLoop]: Abstraction has has 330 places, 396 transitions, 4473 flow [2024-06-03 18:38:45,308 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:38:45,308 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:38:45,309 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:38:45,309 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112 [2024-06-03 18:38:45,309 INFO L420 AbstractCegarLoop]: === Iteration 114 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 18:38:45,309 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:38:45,309 INFO L85 PathProgramCache]: Analyzing trace with hash -204374032, now seen corresponding path program 29 times [2024-06-03 18:38:45,309 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:38:45,309 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1343861812] [2024-06-03 18:38:45,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:38:45,309 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:38:45,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:38:45,433 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:38:45,433 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:38:45,433 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1343861812] [2024-06-03 18:38:45,433 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1343861812] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:38:45,433 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:38:45,433 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 18:38:45,433 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [494323869] [2024-06-03 18:38:45,434 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:38:45,434 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 18:38:45,434 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:38:45,434 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 18:38:45,434 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2024-06-03 18:38:45,471 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 18:38:45,472 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 330 places, 396 transitions, 4473 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:38:45,472 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:38:45,472 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 18:38:45,472 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:38:46,013 INFO L124 PetriNetUnfolderBase]: 1876/3189 cut-off events. [2024-06-03 18:38:46,013 INFO L125 PetriNetUnfolderBase]: For 200322/200334 co-relation queries the response was YES. [2024-06-03 18:38:46,037 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20793 conditions, 3189 events. 1876/3189 cut-off events. For 200322/200334 co-relation queries the response was YES. Maximal size of possible extension queue 269. Compared 19482 event pairs, 380 based on Foata normal form. 13/3202 useless extension candidates. Maximal degree in co-relation 20642. Up to 2612 conditions per place. [2024-06-03 18:38:46,048 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 254 selfloop transitions, 162 changer transitions 0/422 dead transitions. [2024-06-03 18:38:46,048 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 342 places, 422 transitions, 5367 flow [2024-06-03 18:38:46,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-03 18:38:46,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-03 18:38:46,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 270 transitions. [2024-06-03 18:38:46,048 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5065666041275797 [2024-06-03 18:38:46,048 INFO L175 Difference]: Start difference. First operand has 330 places, 396 transitions, 4473 flow. Second operand 13 states and 270 transitions. [2024-06-03 18:38:46,049 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 342 places, 422 transitions, 5367 flow [2024-06-03 18:38:47,024 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 331 places, 422 transitions, 4935 flow, removed 22 selfloop flow, removed 11 redundant places. [2024-06-03 18:38:47,028 INFO L231 Difference]: Finished difference. Result has 332 places, 396 transitions, 4371 flow [2024-06-03 18:38:47,028 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4041, PETRI_DIFFERENCE_MINUEND_PLACES=319, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=396, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=162, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=234, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=4371, PETRI_PLACES=332, PETRI_TRANSITIONS=396} [2024-06-03 18:38:47,028 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 290 predicate places. [2024-06-03 18:38:47,029 INFO L495 AbstractCegarLoop]: Abstraction has has 332 places, 396 transitions, 4371 flow [2024-06-03 18:38:47,029 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:38:47,029 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:38:47,029 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:38:47,029 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113 [2024-06-03 18:38:47,029 INFO L420 AbstractCegarLoop]: === Iteration 115 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 18:38:47,029 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:38:47,029 INFO L85 PathProgramCache]: Analyzing trace with hash 1320336164, now seen corresponding path program 30 times [2024-06-03 18:38:47,030 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:38:47,030 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [764585872] [2024-06-03 18:38:47,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:38:47,030 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:38:47,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:38:47,153 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:38:47,153 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:38:47,153 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [764585872] [2024-06-03 18:38:47,153 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [764585872] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:38:47,153 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:38:47,154 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 18:38:47,154 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [428332955] [2024-06-03 18:38:47,154 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:38:47,154 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 18:38:47,154 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:38:47,154 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 18:38:47,154 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2024-06-03 18:38:47,198 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 18:38:47,198 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 332 places, 396 transitions, 4371 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:38:47,198 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:38:47,198 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 18:38:47,198 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:38:47,707 INFO L124 PetriNetUnfolderBase]: 1873/3183 cut-off events. [2024-06-03 18:38:47,707 INFO L125 PetriNetUnfolderBase]: For 200838/200842 co-relation queries the response was YES. [2024-06-03 18:38:47,731 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20645 conditions, 3183 events. 1873/3183 cut-off events. For 200838/200842 co-relation queries the response was YES. Maximal size of possible extension queue 269. Compared 19469 event pairs, 402 based on Foata normal form. 5/3187 useless extension candidates. Maximal degree in co-relation 20493. Up to 2521 conditions per place. [2024-06-03 18:38:47,742 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 186 selfloop transitions, 226 changer transitions 0/418 dead transitions. [2024-06-03 18:38:47,742 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 343 places, 418 transitions, 5301 flow [2024-06-03 18:38:47,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-03 18:38:47,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-03 18:38:47,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 244 transitions. [2024-06-03 18:38:47,743 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4959349593495935 [2024-06-03 18:38:47,743 INFO L175 Difference]: Start difference. First operand has 332 places, 396 transitions, 4371 flow. Second operand 12 states and 244 transitions. [2024-06-03 18:38:47,743 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 343 places, 418 transitions, 5301 flow [2024-06-03 18:38:48,875 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 330 places, 418 transitions, 4937 flow, removed 0 selfloop flow, removed 13 redundant places. [2024-06-03 18:38:48,879 INFO L231 Difference]: Finished difference. Result has 331 places, 399 transitions, 4533 flow [2024-06-03 18:38:48,879 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4007, PETRI_DIFFERENCE_MINUEND_PLACES=319, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=396, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=223, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=170, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=4533, PETRI_PLACES=331, PETRI_TRANSITIONS=399} [2024-06-03 18:38:48,879 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 289 predicate places. [2024-06-03 18:38:48,879 INFO L495 AbstractCegarLoop]: Abstraction has has 331 places, 399 transitions, 4533 flow [2024-06-03 18:38:48,879 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:38:48,880 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:38:48,880 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:38:48,880 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable114 [2024-06-03 18:38:48,880 INFO L420 AbstractCegarLoop]: === Iteration 116 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 18:38:48,880 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:38:48,880 INFO L85 PathProgramCache]: Analyzing trace with hash 1448194569, now seen corresponding path program 1 times [2024-06-03 18:38:48,880 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:38:48,880 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2065959711] [2024-06-03 18:38:48,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:38:48,880 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:38:48,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:38:49,010 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:38:49,010 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:38:49,010 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2065959711] [2024-06-03 18:38:49,010 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2065959711] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:38:49,010 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:38:49,010 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 18:38:49,010 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [423432990] [2024-06-03 18:38:49,010 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:38:49,011 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 18:38:49,011 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:38:49,011 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 18:38:49,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-06-03 18:38:49,054 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 18:38:49,055 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 331 places, 399 transitions, 4533 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:38:49,055 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:38:49,055 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 18:38:49,055 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:38:49,583 INFO L124 PetriNetUnfolderBase]: 1959/3316 cut-off events. [2024-06-03 18:38:49,583 INFO L125 PetriNetUnfolderBase]: For 272566/272574 co-relation queries the response was YES. [2024-06-03 18:38:49,609 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22955 conditions, 3316 events. 1959/3316 cut-off events. For 272566/272574 co-relation queries the response was YES. Maximal size of possible extension queue 274. Compared 20165 event pairs, 314 based on Foata normal form. 14/3323 useless extension candidates. Maximal degree in co-relation 22802. Up to 1909 conditions per place. [2024-06-03 18:38:49,620 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 335 selfloop transitions, 101 changer transitions 0/442 dead transitions. [2024-06-03 18:38:49,620 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 338 places, 442 transitions, 5973 flow [2024-06-03 18:38:49,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 18:38:49,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 18:38:49,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 192 transitions. [2024-06-03 18:38:49,621 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5853658536585366 [2024-06-03 18:38:49,621 INFO L175 Difference]: Start difference. First operand has 331 places, 399 transitions, 4533 flow. Second operand 8 states and 192 transitions. [2024-06-03 18:38:49,621 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 338 places, 442 transitions, 5973 flow [2024-06-03 18:38:50,988 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 328 places, 442 transitions, 5469 flow, removed 28 selfloop flow, removed 10 redundant places. [2024-06-03 18:38:50,992 INFO L231 Difference]: Finished difference. Result has 329 places, 402 transitions, 4291 flow [2024-06-03 18:38:50,992 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4029, PETRI_DIFFERENCE_MINUEND_PLACES=321, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=399, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=99, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=300, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4291, PETRI_PLACES=329, PETRI_TRANSITIONS=402} [2024-06-03 18:38:50,992 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 287 predicate places. [2024-06-03 18:38:50,992 INFO L495 AbstractCegarLoop]: Abstraction has has 329 places, 402 transitions, 4291 flow [2024-06-03 18:38:50,992 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:38:50,992 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:38:50,993 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:38:50,993 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115 [2024-06-03 18:38:50,993 INFO L420 AbstractCegarLoop]: === Iteration 117 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 18:38:50,993 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:38:50,993 INFO L85 PathProgramCache]: Analyzing trace with hash 768729067, now seen corresponding path program 2 times [2024-06-03 18:38:50,993 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:38:50,993 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1506056364] [2024-06-03 18:38:50,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:38:50,993 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:38:50,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:38:51,131 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:38:51,132 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:38:51,132 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1506056364] [2024-06-03 18:38:51,132 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1506056364] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:38:51,132 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:38:51,132 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 18:38:51,132 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1519575407] [2024-06-03 18:38:51,132 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:38:51,133 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 18:38:51,133 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:38:51,133 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 18:38:51,133 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-03 18:38:51,193 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 18:38:51,193 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 329 places, 402 transitions, 4291 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:38:51,193 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:38:51,193 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 18:38:51,193 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:38:51,744 INFO L124 PetriNetUnfolderBase]: 1987/3371 cut-off events. [2024-06-03 18:38:51,744 INFO L125 PetriNetUnfolderBase]: For 276263/276275 co-relation queries the response was YES. [2024-06-03 18:38:51,770 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23112 conditions, 3371 events. 1987/3371 cut-off events. For 276263/276275 co-relation queries the response was YES. Maximal size of possible extension queue 278. Compared 20626 event pairs, 292 based on Foata normal form. 18/3389 useless extension candidates. Maximal degree in co-relation 22958. Up to 2774 conditions per place. [2024-06-03 18:38:51,781 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 372 selfloop transitions, 57 changer transitions 0/435 dead transitions. [2024-06-03 18:38:51,782 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 336 places, 435 transitions, 5275 flow [2024-06-03 18:38:51,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 18:38:51,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 18:38:51,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 180 transitions. [2024-06-03 18:38:51,782 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5487804878048781 [2024-06-03 18:38:51,782 INFO L175 Difference]: Start difference. First operand has 329 places, 402 transitions, 4291 flow. Second operand 8 states and 180 transitions. [2024-06-03 18:38:51,782 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 336 places, 435 transitions, 5275 flow [2024-06-03 18:38:53,073 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 333 places, 435 transitions, 5146 flow, removed 13 selfloop flow, removed 3 redundant places. [2024-06-03 18:38:53,079 INFO L231 Difference]: Finished difference. Result has 334 places, 405 transitions, 4318 flow [2024-06-03 18:38:53,079 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4170, PETRI_DIFFERENCE_MINUEND_PLACES=326, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=402, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=347, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4318, PETRI_PLACES=334, PETRI_TRANSITIONS=405} [2024-06-03 18:38:53,079 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 292 predicate places. [2024-06-03 18:38:53,079 INFO L495 AbstractCegarLoop]: Abstraction has has 334 places, 405 transitions, 4318 flow [2024-06-03 18:38:53,079 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:38:53,079 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:38:53,080 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:38:53,080 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116 [2024-06-03 18:38:53,080 INFO L420 AbstractCegarLoop]: === Iteration 118 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 18:38:53,080 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:38:53,080 INFO L85 PathProgramCache]: Analyzing trace with hash 768729253, now seen corresponding path program 1 times [2024-06-03 18:38:53,080 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:38:53,080 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [308546244] [2024-06-03 18:38:53,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:38:53,081 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:38:53,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:38:53,210 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:38:53,211 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:38:53,211 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [308546244] [2024-06-03 18:38:53,211 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [308546244] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:38:53,211 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:38:53,211 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 18:38:53,211 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1618691074] [2024-06-03 18:38:53,211 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:38:53,211 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 18:38:53,211 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:38:53,211 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 18:38:53,211 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-03 18:38:53,253 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 18:38:53,253 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 334 places, 405 transitions, 4318 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:38:53,253 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:38:53,253 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 18:38:53,253 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:38:53,888 INFO L124 PetriNetUnfolderBase]: 2099/3555 cut-off events. [2024-06-03 18:38:53,888 INFO L125 PetriNetUnfolderBase]: For 346230/346242 co-relation queries the response was YES. [2024-06-03 18:38:53,914 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25914 conditions, 3555 events. 2099/3555 cut-off events. For 346230/346242 co-relation queries the response was YES. Maximal size of possible extension queue 291. Compared 22026 event pairs, 337 based on Foata normal form. 18/3573 useless extension candidates. Maximal degree in co-relation 25758. Up to 2502 conditions per place. [2024-06-03 18:38:53,925 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 340 selfloop transitions, 102 changer transitions 0/448 dead transitions. [2024-06-03 18:38:53,925 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 343 places, 448 transitions, 5828 flow [2024-06-03 18:38:53,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 18:38:53,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 18:38:53,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 225 transitions. [2024-06-03 18:38:53,927 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5487804878048781 [2024-06-03 18:38:53,927 INFO L175 Difference]: Start difference. First operand has 334 places, 405 transitions, 4318 flow. Second operand 10 states and 225 transitions. [2024-06-03 18:38:53,927 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 343 places, 448 transitions, 5828 flow [2024-06-03 18:38:55,399 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 338 places, 448 transitions, 5710 flow, removed 4 selfloop flow, removed 5 redundant places. [2024-06-03 18:38:55,403 INFO L231 Difference]: Finished difference. Result has 339 places, 408 transitions, 4482 flow [2024-06-03 18:38:55,404 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4200, PETRI_DIFFERENCE_MINUEND_PLACES=329, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=405, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=100, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=305, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4482, PETRI_PLACES=339, PETRI_TRANSITIONS=408} [2024-06-03 18:38:55,404 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 297 predicate places. [2024-06-03 18:38:55,404 INFO L495 AbstractCegarLoop]: Abstraction has has 339 places, 408 transitions, 4482 flow [2024-06-03 18:38:55,404 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:38:55,404 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:38:55,404 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:38:55,405 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117 [2024-06-03 18:38:55,405 INFO L420 AbstractCegarLoop]: === Iteration 119 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 18:38:55,405 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:38:55,405 INFO L85 PathProgramCache]: Analyzing trace with hash 945860587, now seen corresponding path program 3 times [2024-06-03 18:38:55,405 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:38:55,405 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [390623284] [2024-06-03 18:38:55,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:38:55,405 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:38:55,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:38:55,542 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:38:55,542 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:38:55,542 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [390623284] [2024-06-03 18:38:55,542 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [390623284] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:38:55,542 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:38:55,542 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 18:38:55,542 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [431948346] [2024-06-03 18:38:55,542 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:38:55,542 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 18:38:55,542 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:38:55,543 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 18:38:55,543 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-03 18:38:55,614 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 18:38:55,614 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 339 places, 408 transitions, 4482 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:38:55,614 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:38:55,614 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 18:38:55,614 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:38:56,229 INFO L124 PetriNetUnfolderBase]: 2176/3682 cut-off events. [2024-06-03 18:38:56,229 INFO L125 PetriNetUnfolderBase]: For 379702/379714 co-relation queries the response was YES. [2024-06-03 18:38:56,259 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27381 conditions, 3682 events. 2176/3682 cut-off events. For 379702/379714 co-relation queries the response was YES. Maximal size of possible extension queue 300. Compared 22994 event pairs, 318 based on Foata normal form. 18/3700 useless extension candidates. Maximal degree in co-relation 27224. Up to 2988 conditions per place. [2024-06-03 18:38:56,272 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 377 selfloop transitions, 65 changer transitions 0/448 dead transitions. [2024-06-03 18:38:56,272 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 347 places, 448 transitions, 5738 flow [2024-06-03 18:38:56,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 18:38:56,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 18:38:56,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 196 transitions. [2024-06-03 18:38:56,273 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5311653116531165 [2024-06-03 18:38:56,273 INFO L175 Difference]: Start difference. First operand has 339 places, 408 transitions, 4482 flow. Second operand 9 states and 196 transitions. [2024-06-03 18:38:56,273 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 347 places, 448 transitions, 5738 flow [2024-06-03 18:38:57,496 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 342 places, 448 transitions, 5626 flow, removed 6 selfloop flow, removed 5 redundant places. [2024-06-03 18:38:57,500 INFO L231 Difference]: Finished difference. Result has 344 places, 416 transitions, 4597 flow [2024-06-03 18:38:57,500 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4370, PETRI_DIFFERENCE_MINUEND_PLACES=334, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=408, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=349, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4597, PETRI_PLACES=344, PETRI_TRANSITIONS=416} [2024-06-03 18:38:57,500 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 302 predicate places. [2024-06-03 18:38:57,501 INFO L495 AbstractCegarLoop]: Abstraction has has 344 places, 416 transitions, 4597 flow [2024-06-03 18:38:57,501 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:38:57,501 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:38:57,501 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:38:57,501 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118 [2024-06-03 18:38:57,501 INFO L420 AbstractCegarLoop]: === Iteration 120 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 18:38:57,501 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:38:57,501 INFO L85 PathProgramCache]: Analyzing trace with hash 945860773, now seen corresponding path program 2 times [2024-06-03 18:38:57,501 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:38:57,501 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1170463654] [2024-06-03 18:38:57,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:38:57,501 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:38:57,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:38:57,631 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:38:57,631 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:38:57,631 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1170463654] [2024-06-03 18:38:57,631 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1170463654] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:38:57,631 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:38:57,631 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 18:38:57,631 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [711965700] [2024-06-03 18:38:57,632 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:38:57,632 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 18:38:57,632 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:38:57,632 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 18:38:57,632 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-03 18:38:57,674 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 18:38:57,674 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 344 places, 416 transitions, 4597 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:38:57,674 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:38:57,674 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 18:38:57,674 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:38:58,413 INFO L124 PetriNetUnfolderBase]: 2262/3820 cut-off events. [2024-06-03 18:38:58,413 INFO L125 PetriNetUnfolderBase]: For 438436/438448 co-relation queries the response was YES. [2024-06-03 18:38:58,439 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29802 conditions, 3820 events. 2262/3820 cut-off events. For 438436/438448 co-relation queries the response was YES. Maximal size of possible extension queue 308. Compared 23912 event pairs, 360 based on Foata normal form. 18/3838 useless extension candidates. Maximal degree in co-relation 29642. Up to 2645 conditions per place. [2024-06-03 18:38:58,451 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 349 selfloop transitions, 103 changer transitions 0/458 dead transitions. [2024-06-03 18:38:58,451 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 353 places, 458 transitions, 6317 flow [2024-06-03 18:38:58,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 18:38:58,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 18:38:58,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 224 transitions. [2024-06-03 18:38:58,452 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5463414634146342 [2024-06-03 18:38:58,452 INFO L175 Difference]: Start difference. First operand has 344 places, 416 transitions, 4597 flow. Second operand 10 states and 224 transitions. [2024-06-03 18:38:58,452 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 353 places, 458 transitions, 6317 flow [2024-06-03 18:39:00,087 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 349 places, 458 transitions, 6199 flow, removed 16 selfloop flow, removed 4 redundant places. [2024-06-03 18:39:00,091 INFO L231 Difference]: Finished difference. Result has 350 places, 419 transitions, 4767 flow [2024-06-03 18:39:00,091 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4479, PETRI_DIFFERENCE_MINUEND_PLACES=340, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=416, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=100, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=316, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4767, PETRI_PLACES=350, PETRI_TRANSITIONS=419} [2024-06-03 18:39:00,092 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 308 predicate places. [2024-06-03 18:39:00,092 INFO L495 AbstractCegarLoop]: Abstraction has has 350 places, 419 transitions, 4767 flow [2024-06-03 18:39:00,092 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:39:00,092 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:39:00,092 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:39:00,092 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119 [2024-06-03 18:39:00,092 INFO L420 AbstractCegarLoop]: === Iteration 121 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 18:39:00,092 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:39:00,092 INFO L85 PathProgramCache]: Analyzing trace with hash 946097923, now seen corresponding path program 3 times [2024-06-03 18:39:00,092 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:39:00,092 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1383769129] [2024-06-03 18:39:00,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:39:00,093 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:39:00,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:39:00,232 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:39:00,233 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:39:00,233 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1383769129] [2024-06-03 18:39:00,233 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1383769129] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:39:00,233 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:39:00,233 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 18:39:00,233 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1892210089] [2024-06-03 18:39:00,233 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:39:00,233 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 18:39:00,233 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:39:00,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 18:39:00,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-03 18:39:00,306 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 18:39:00,307 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 350 places, 419 transitions, 4767 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:39:00,307 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:39:00,307 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 18:39:00,307 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:39:00,994 INFO L124 PetriNetUnfolderBase]: 2249/3801 cut-off events. [2024-06-03 18:39:00,995 INFO L125 PetriNetUnfolderBase]: For 423965/423977 co-relation queries the response was YES. [2024-06-03 18:39:01,025 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29290 conditions, 3801 events. 2249/3801 cut-off events. For 423965/423977 co-relation queries the response was YES. Maximal size of possible extension queue 308. Compared 23736 event pairs, 360 based on Foata normal form. 18/3819 useless extension candidates. Maximal degree in co-relation 29130. Up to 2639 conditions per place. [2024-06-03 18:39:01,038 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 343 selfloop transitions, 106 changer transitions 0/455 dead transitions. [2024-06-03 18:39:01,038 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 359 places, 455 transitions, 6199 flow [2024-06-03 18:39:01,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 18:39:01,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 18:39:01,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 221 transitions. [2024-06-03 18:39:01,039 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5390243902439025 [2024-06-03 18:39:01,039 INFO L175 Difference]: Start difference. First operand has 350 places, 419 transitions, 4767 flow. Second operand 10 states and 221 transitions. [2024-06-03 18:39:01,039 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 359 places, 455 transitions, 6199 flow [2024-06-03 18:39:02,592 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 354 places, 455 transitions, 6033 flow, removed 12 selfloop flow, removed 5 redundant places. [2024-06-03 18:39:02,597 INFO L231 Difference]: Finished difference. Result has 355 places, 419 transitions, 4817 flow [2024-06-03 18:39:02,597 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4601, PETRI_DIFFERENCE_MINUEND_PLACES=345, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=419, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=106, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=313, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4817, PETRI_PLACES=355, PETRI_TRANSITIONS=419} [2024-06-03 18:39:02,597 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 313 predicate places. [2024-06-03 18:39:02,597 INFO L495 AbstractCegarLoop]: Abstraction has has 355 places, 419 transitions, 4817 flow [2024-06-03 18:39:02,597 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:39:02,597 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:39:02,597 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:39:02,598 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120 [2024-06-03 18:39:02,598 INFO L420 AbstractCegarLoop]: === Iteration 122 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 18:39:02,598 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:39:02,598 INFO L85 PathProgramCache]: Analyzing trace with hash 123061607, now seen corresponding path program 4 times [2024-06-03 18:39:02,598 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:39:02,598 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1379934235] [2024-06-03 18:39:02,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:39:02,598 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:39:02,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:39:02,733 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:39:02,733 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:39:02,733 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1379934235] [2024-06-03 18:39:02,733 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1379934235] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:39:02,733 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:39:02,733 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 18:39:02,733 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [911465776] [2024-06-03 18:39:02,733 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:39:02,733 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 18:39:02,733 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:39:02,733 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 18:39:02,734 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-03 18:39:02,786 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 18:39:02,786 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 355 places, 419 transitions, 4817 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:39:02,786 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:39:02,786 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 18:39:02,786 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:39:03,491 INFO L124 PetriNetUnfolderBase]: 2323/3912 cut-off events. [2024-06-03 18:39:03,491 INFO L125 PetriNetUnfolderBase]: For 478066/478074 co-relation queries the response was YES. [2024-06-03 18:39:03,516 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30892 conditions, 3912 events. 2323/3912 cut-off events. For 478066/478074 co-relation queries the response was YES. Maximal size of possible extension queue 319. Compared 24590 event pairs, 553 based on Foata normal form. 16/3925 useless extension candidates. Maximal degree in co-relation 30731. Up to 3162 conditions per place. [2024-06-03 18:39:03,528 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 356 selfloop transitions, 95 changer transitions 0/457 dead transitions. [2024-06-03 18:39:03,529 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 362 places, 457 transitions, 6109 flow [2024-06-03 18:39:03,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 18:39:03,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 18:39:03,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 189 transitions. [2024-06-03 18:39:03,529 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5762195121951219 [2024-06-03 18:39:03,529 INFO L175 Difference]: Start difference. First operand has 355 places, 419 transitions, 4817 flow. Second operand 8 states and 189 transitions. [2024-06-03 18:39:03,529 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 362 places, 457 transitions, 6109 flow [2024-06-03 18:39:05,189 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 354 places, 457 transitions, 5899 flow, removed 2 selfloop flow, removed 8 redundant places. [2024-06-03 18:39:05,193 INFO L231 Difference]: Finished difference. Result has 355 places, 421 transitions, 4843 flow [2024-06-03 18:39:05,193 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4607, PETRI_DIFFERENCE_MINUEND_PLACES=347, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=419, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=94, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=325, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4843, PETRI_PLACES=355, PETRI_TRANSITIONS=421} [2024-06-03 18:39:05,193 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 313 predicate places. [2024-06-03 18:39:05,193 INFO L495 AbstractCegarLoop]: Abstraction has has 355 places, 421 transitions, 4843 flow [2024-06-03 18:39:05,194 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:39:05,194 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:39:05,194 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:39:05,194 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121 [2024-06-03 18:39:05,194 INFO L420 AbstractCegarLoop]: === Iteration 123 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 18:39:05,194 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:39:05,194 INFO L85 PathProgramCache]: Analyzing trace with hash 131632487, now seen corresponding path program 5 times [2024-06-03 18:39:05,194 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:39:05,194 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [636057016] [2024-06-03 18:39:05,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:39:05,194 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:39:05,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:39:05,327 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:39:05,327 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:39:05,327 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [636057016] [2024-06-03 18:39:05,327 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [636057016] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:39:05,327 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:39:05,328 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 18:39:05,328 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [334028066] [2024-06-03 18:39:05,328 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:39:05,328 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 18:39:05,328 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:39:05,328 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 18:39:05,328 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2024-06-03 18:39:05,371 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 18:39:05,371 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 355 places, 421 transitions, 4843 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:39:05,371 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:39:05,371 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 18:39:05,371 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:39:06,014 INFO L124 PetriNetUnfolderBase]: 2351/3958 cut-off events. [2024-06-03 18:39:06,015 INFO L125 PetriNetUnfolderBase]: For 487745/487753 co-relation queries the response was YES. [2024-06-03 18:39:06,047 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31252 conditions, 3958 events. 2351/3958 cut-off events. For 487745/487753 co-relation queries the response was YES. Maximal size of possible extension queue 323. Compared 24919 event pairs, 575 based on Foata normal form. 16/3973 useless extension candidates. Maximal degree in co-relation 31090. Up to 3372 conditions per place. [2024-06-03 18:39:06,061 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 350 selfloop transitions, 94 changer transitions 0/450 dead transitions. [2024-06-03 18:39:06,061 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 362 places, 450 transitions, 5861 flow [2024-06-03 18:39:06,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 18:39:06,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 18:39:06,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 182 transitions. [2024-06-03 18:39:06,062 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5548780487804879 [2024-06-03 18:39:06,062 INFO L175 Difference]: Start difference. First operand has 355 places, 421 transitions, 4843 flow. Second operand 8 states and 182 transitions. [2024-06-03 18:39:06,062 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 362 places, 450 transitions, 5861 flow [2024-06-03 18:39:07,955 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 358 places, 450 transitions, 5737 flow, removed 8 selfloop flow, removed 4 redundant places. [2024-06-03 18:39:07,959 INFO L231 Difference]: Finished difference. Result has 359 places, 422 transitions, 4936 flow [2024-06-03 18:39:07,959 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4723, PETRI_DIFFERENCE_MINUEND_PLACES=351, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=421, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=93, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=327, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4936, PETRI_PLACES=359, PETRI_TRANSITIONS=422} [2024-06-03 18:39:07,960 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 317 predicate places. [2024-06-03 18:39:07,960 INFO L495 AbstractCegarLoop]: Abstraction has has 359 places, 422 transitions, 4936 flow [2024-06-03 18:39:07,960 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:39:07,960 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:39:07,960 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:39:07,960 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122 [2024-06-03 18:39:07,960 INFO L420 AbstractCegarLoop]: === Iteration 124 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 18:39:07,960 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:39:07,960 INFO L85 PathProgramCache]: Analyzing trace with hash 1793947023, now seen corresponding path program 6 times [2024-06-03 18:39:07,960 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:39:07,960 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1536255230] [2024-06-03 18:39:07,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:39:07,960 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:39:07,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:39:08,107 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:39:08,107 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:39:08,107 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1536255230] [2024-06-03 18:39:08,107 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1536255230] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:39:08,107 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:39:08,107 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 18:39:08,107 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1730481083] [2024-06-03 18:39:08,108 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:39:08,108 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 18:39:08,108 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:39:08,108 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 18:39:08,108 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-06-03 18:39:08,152 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 18:39:08,152 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 359 places, 422 transitions, 4936 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:39:08,153 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:39:08,153 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 18:39:08,153 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:39:08,922 INFO L124 PetriNetUnfolderBase]: 2437/4094 cut-off events. [2024-06-03 18:39:08,922 INFO L125 PetriNetUnfolderBase]: For 544207/544215 co-relation queries the response was YES. [2024-06-03 18:39:08,951 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33429 conditions, 4094 events. 2437/4094 cut-off events. For 544207/544215 co-relation queries the response was YES. Maximal size of possible extension queue 329. Compared 25871 event pairs, 562 based on Foata normal form. 14/4101 useless extension candidates. Maximal degree in co-relation 33265. Up to 3101 conditions per place. [2024-06-03 18:39:08,965 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 358 selfloop transitions, 100 changer transitions 0/464 dead transitions. [2024-06-03 18:39:08,965 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 366 places, 464 transitions, 6456 flow [2024-06-03 18:39:08,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 18:39:08,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 18:39:08,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 192 transitions. [2024-06-03 18:39:08,966 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5853658536585366 [2024-06-03 18:39:08,966 INFO L175 Difference]: Start difference. First operand has 359 places, 422 transitions, 4936 flow. Second operand 8 states and 192 transitions. [2024-06-03 18:39:08,966 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 366 places, 464 transitions, 6456 flow [2024-06-03 18:39:11,031 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 360 places, 464 transitions, 6267 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-06-03 18:39:11,035 INFO L231 Difference]: Finished difference. Result has 362 places, 425 transitions, 5021 flow [2024-06-03 18:39:11,035 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4747, PETRI_DIFFERENCE_MINUEND_PLACES=353, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=422, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=98, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=323, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5021, PETRI_PLACES=362, PETRI_TRANSITIONS=425} [2024-06-03 18:39:11,036 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 320 predicate places. [2024-06-03 18:39:11,036 INFO L495 AbstractCegarLoop]: Abstraction has has 362 places, 425 transitions, 5021 flow [2024-06-03 18:39:11,036 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:39:11,036 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:39:11,036 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:39:11,036 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123 [2024-06-03 18:39:11,036 INFO L420 AbstractCegarLoop]: === Iteration 125 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 18:39:11,036 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:39:11,036 INFO L85 PathProgramCache]: Analyzing trace with hash -18921493, now seen corresponding path program 7 times [2024-06-03 18:39:11,036 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:39:11,036 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [842184761] [2024-06-03 18:39:11,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:39:11,037 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:39:11,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:39:11,194 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:39:11,194 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:39:11,194 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [842184761] [2024-06-03 18:39:11,195 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [842184761] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:39:11,195 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:39:11,195 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 18:39:11,195 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [688919563] [2024-06-03 18:39:11,195 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:39:11,195 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 18:39:11,195 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:39:11,195 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 18:39:11,195 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-03 18:39:11,254 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 18:39:11,254 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 362 places, 425 transitions, 5021 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:39:11,254 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:39:11,254 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 18:39:11,254 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:39:11,953 INFO L124 PetriNetUnfolderBase]: 2424/4071 cut-off events. [2024-06-03 18:39:11,953 INFO L125 PetriNetUnfolderBase]: For 528592/528604 co-relation queries the response was YES. [2024-06-03 18:39:11,989 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33044 conditions, 4071 events. 2424/4071 cut-off events. For 528592/528604 co-relation queries the response was YES. Maximal size of possible extension queue 329. Compared 25704 event pairs, 572 based on Foata normal form. 18/4078 useless extension candidates. Maximal degree in co-relation 32878. Up to 3576 conditions per place. [2024-06-03 18:39:12,004 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 401 selfloop transitions, 47 changer transitions 0/454 dead transitions. [2024-06-03 18:39:12,004 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 369 places, 454 transitions, 6005 flow [2024-06-03 18:39:12,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 18:39:12,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 18:39:12,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 179 transitions. [2024-06-03 18:39:12,005 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5457317073170732 [2024-06-03 18:39:12,005 INFO L175 Difference]: Start difference. First operand has 362 places, 425 transitions, 5021 flow. Second operand 8 states and 179 transitions. [2024-06-03 18:39:12,005 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 369 places, 454 transitions, 6005 flow [2024-06-03 18:39:13,847 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 364 places, 454 transitions, 5792 flow, removed 11 selfloop flow, removed 5 redundant places. [2024-06-03 18:39:13,851 INFO L231 Difference]: Finished difference. Result has 365 places, 425 transitions, 4906 flow [2024-06-03 18:39:13,851 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4808, PETRI_DIFFERENCE_MINUEND_PLACES=357, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=425, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=378, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4906, PETRI_PLACES=365, PETRI_TRANSITIONS=425} [2024-06-03 18:39:13,852 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 323 predicate places. [2024-06-03 18:39:13,852 INFO L495 AbstractCegarLoop]: Abstraction has has 365 places, 425 transitions, 4906 flow [2024-06-03 18:39:13,852 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:39:13,852 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:39:13,852 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:39:13,852 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable124 [2024-06-03 18:39:13,852 INFO L420 AbstractCegarLoop]: === Iteration 126 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 18:39:13,852 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:39:13,852 INFO L85 PathProgramCache]: Analyzing trace with hash -18921307, now seen corresponding path program 4 times [2024-06-03 18:39:13,852 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:39:13,853 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1404381445] [2024-06-03 18:39:13,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:39:13,853 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:39:13,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:39:13,983 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:39:13,984 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:39:13,984 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1404381445] [2024-06-03 18:39:13,984 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1404381445] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:39:13,984 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:39:13,984 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 18:39:13,984 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [86029593] [2024-06-03 18:39:13,984 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:39:13,984 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 18:39:13,984 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:39:13,984 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 18:39:13,984 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-03 18:39:14,057 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 18:39:14,058 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 365 places, 425 transitions, 4906 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:39:14,058 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:39:14,058 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 18:39:14,058 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:39:14,858 INFO L124 PetriNetUnfolderBase]: 2490/4179 cut-off events. [2024-06-03 18:39:14,858 INFO L125 PetriNetUnfolderBase]: For 574266/574278 co-relation queries the response was YES. [2024-06-03 18:39:14,892 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34413 conditions, 4179 events. 2490/4179 cut-off events. For 574266/574278 co-relation queries the response was YES. Maximal size of possible extension queue 334. Compared 26511 event pairs, 592 based on Foata normal form. 18/4188 useless extension candidates. Maximal degree in co-relation 34246. Up to 3552 conditions per place. [2024-06-03 18:39:14,907 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 364 selfloop transitions, 93 changer transitions 0/463 dead transitions. [2024-06-03 18:39:14,907 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 375 places, 463 transitions, 6213 flow [2024-06-03 18:39:14,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-03 18:39:14,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-03 18:39:14,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 237 transitions. [2024-06-03 18:39:14,908 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5254988913525499 [2024-06-03 18:39:14,908 INFO L175 Difference]: Start difference. First operand has 365 places, 425 transitions, 4906 flow. Second operand 11 states and 237 transitions. [2024-06-03 18:39:14,908 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 375 places, 463 transitions, 6213 flow [2024-06-03 18:39:16,956 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 370 places, 463 transitions, 6117 flow, removed 3 selfloop flow, removed 5 redundant places. [2024-06-03 18:39:16,960 INFO L231 Difference]: Finished difference. Result has 372 places, 427 transitions, 5075 flow [2024-06-03 18:39:16,960 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4810, PETRI_DIFFERENCE_MINUEND_PLACES=360, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=425, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=91, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=332, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=5075, PETRI_PLACES=372, PETRI_TRANSITIONS=427} [2024-06-03 18:39:16,961 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 330 predicate places. [2024-06-03 18:39:16,961 INFO L495 AbstractCegarLoop]: Abstraction has has 372 places, 427 transitions, 5075 flow [2024-06-03 18:39:16,961 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:39:16,961 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:39:16,961 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:39:16,961 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable125 [2024-06-03 18:39:16,961 INFO L420 AbstractCegarLoop]: === Iteration 127 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 18:39:16,961 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:39:16,961 INFO L85 PathProgramCache]: Analyzing trace with hash 246923657, now seen corresponding path program 8 times [2024-06-03 18:39:16,961 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:39:16,961 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [999630364] [2024-06-03 18:39:16,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:39:16,962 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:39:16,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:39:17,105 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:39:17,105 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:39:17,105 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [999630364] [2024-06-03 18:39:17,106 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [999630364] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:39:17,106 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:39:17,106 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 18:39:17,106 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2036660904] [2024-06-03 18:39:17,106 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:39:17,106 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 18:39:17,106 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:39:17,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 18:39:17,106 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-03 18:39:17,156 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 18:39:17,156 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 372 places, 427 transitions, 5075 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:39:17,156 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:39:17,156 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 18:39:17,156 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:39:17,913 INFO L124 PetriNetUnfolderBase]: 2518/4232 cut-off events. [2024-06-03 18:39:17,914 INFO L125 PetriNetUnfolderBase]: For 597707/597719 co-relation queries the response was YES. [2024-06-03 18:39:17,952 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35028 conditions, 4232 events. 2518/4232 cut-off events. For 597707/597719 co-relation queries the response was YES. Maximal size of possible extension queue 338. Compared 26943 event pairs, 613 based on Foata normal form. 20/4252 useless extension candidates. Maximal degree in co-relation 34859. Up to 3747 conditions per place. [2024-06-03 18:39:17,968 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 402 selfloop transitions, 45 changer transitions 0/453 dead transitions. [2024-06-03 18:39:17,968 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 379 places, 453 transitions, 6089 flow [2024-06-03 18:39:17,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 18:39:17,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 18:39:17,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 176 transitions. [2024-06-03 18:39:17,969 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5365853658536586 [2024-06-03 18:39:17,969 INFO L175 Difference]: Start difference. First operand has 372 places, 427 transitions, 5075 flow. Second operand 8 states and 176 transitions. [2024-06-03 18:39:17,969 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 379 places, 453 transitions, 6089 flow [2024-06-03 18:39:20,176 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 371 places, 453 transitions, 5917 flow, removed 4 selfloop flow, removed 8 redundant places. [2024-06-03 18:39:20,180 INFO L231 Difference]: Finished difference. Result has 372 places, 428 transitions, 5020 flow [2024-06-03 18:39:20,181 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4903, PETRI_DIFFERENCE_MINUEND_PLACES=364, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=427, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=382, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5020, PETRI_PLACES=372, PETRI_TRANSITIONS=428} [2024-06-03 18:39:20,181 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 330 predicate places. [2024-06-03 18:39:20,181 INFO L495 AbstractCegarLoop]: Abstraction has has 372 places, 428 transitions, 5020 flow [2024-06-03 18:39:20,181 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:39:20,181 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:39:20,181 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:39:20,181 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126 [2024-06-03 18:39:20,181 INFO L420 AbstractCegarLoop]: === Iteration 128 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 18:39:20,181 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:39:20,182 INFO L85 PathProgramCache]: Analyzing trace with hash 247102403, now seen corresponding path program 5 times [2024-06-03 18:39:20,182 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:39:20,182 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [356583903] [2024-06-03 18:39:20,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:39:20,184 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:39:20,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:39:20,322 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:39:20,322 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:39:20,323 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [356583903] [2024-06-03 18:39:20,323 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [356583903] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:39:20,323 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:39:20,323 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 18:39:20,324 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1492377118] [2024-06-03 18:39:20,324 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:39:20,324 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 18:39:20,324 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:39:20,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 18:39:20,325 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2024-06-03 18:39:20,365 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 18:39:20,365 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 372 places, 428 transitions, 5020 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:39:20,365 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:39:20,365 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 18:39:20,365 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:39:21,171 INFO L124 PetriNetUnfolderBase]: 2546/4276 cut-off events. [2024-06-03 18:39:21,172 INFO L125 PetriNetUnfolderBase]: For 609318/609330 co-relation queries the response was YES. [2024-06-03 18:39:21,210 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35426 conditions, 4276 events. 2546/4276 cut-off events. For 609318/609330 co-relation queries the response was YES. Maximal size of possible extension queue 342. Compared 27234 event pairs, 617 based on Foata normal form. 20/4296 useless extension candidates. Maximal degree in co-relation 35256. Up to 3742 conditions per place. [2024-06-03 18:39:21,226 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 363 selfloop transitions, 88 changer transitions 0/457 dead transitions. [2024-06-03 18:39:21,226 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 382 places, 457 transitions, 6061 flow [2024-06-03 18:39:21,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-03 18:39:21,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-03 18:39:21,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 230 transitions. [2024-06-03 18:39:21,227 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5099778270509978 [2024-06-03 18:39:21,227 INFO L175 Difference]: Start difference. First operand has 372 places, 428 transitions, 5020 flow. Second operand 11 states and 230 transitions. [2024-06-03 18:39:21,228 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 382 places, 457 transitions, 6061 flow [2024-06-03 18:39:23,416 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 376 places, 457 transitions, 5968 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-06-03 18:39:23,421 INFO L231 Difference]: Finished difference. Result has 377 places, 429 transitions, 5139 flow [2024-06-03 18:39:23,421 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4927, PETRI_DIFFERENCE_MINUEND_PLACES=366, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=428, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=87, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=340, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=5139, PETRI_PLACES=377, PETRI_TRANSITIONS=429} [2024-06-03 18:39:23,421 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 335 predicate places. [2024-06-03 18:39:23,422 INFO L495 AbstractCegarLoop]: Abstraction has has 377 places, 429 transitions, 5139 flow [2024-06-03 18:39:23,422 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:39:23,422 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:39:23,422 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:39:23,422 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127 [2024-06-03 18:39:23,422 INFO L420 AbstractCegarLoop]: === Iteration 129 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 18:39:23,422 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:39:23,422 INFO L85 PathProgramCache]: Analyzing trace with hash -11512183, now seen corresponding path program 9 times [2024-06-03 18:39:23,423 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:39:23,423 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1910700011] [2024-06-03 18:39:23,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:39:23,423 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:39:23,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:39:23,584 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:39:23,584 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:39:23,584 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1910700011] [2024-06-03 18:39:23,584 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1910700011] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:39:23,584 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:39:23,584 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 18:39:23,584 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2101297935] [2024-06-03 18:39:23,585 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:39:23,585 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 18:39:23,585 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:39:23,585 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 18:39:23,585 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-03 18:39:23,636 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 18:39:23,637 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 377 places, 429 transitions, 5139 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:39:23,637 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:39:23,637 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 18:39:23,637 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:39:24,462 INFO L124 PetriNetUnfolderBase]: 2574/4326 cut-off events. [2024-06-03 18:39:24,463 INFO L125 PetriNetUnfolderBase]: For 613175/613187 co-relation queries the response was YES. [2024-06-03 18:39:24,503 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35899 conditions, 4326 events. 2574/4326 cut-off events. For 613175/613187 co-relation queries the response was YES. Maximal size of possible extension queue 346. Compared 27624 event pairs, 617 based on Foata normal form. 18/4342 useless extension candidates. Maximal degree in co-relation 35728. Up to 3805 conditions per place. [2024-06-03 18:39:24,520 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 407 selfloop transitions, 48 changer transitions 0/461 dead transitions. [2024-06-03 18:39:24,520 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 385 places, 461 transitions, 6218 flow [2024-06-03 18:39:24,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 18:39:24,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 18:39:24,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 195 transitions. [2024-06-03 18:39:24,521 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5284552845528455 [2024-06-03 18:39:24,521 INFO L175 Difference]: Start difference. First operand has 377 places, 429 transitions, 5139 flow. Second operand 9 states and 195 transitions. [2024-06-03 18:39:24,521 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 385 places, 461 transitions, 6218 flow [2024-06-03 18:39:26,985 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 376 places, 461 transitions, 6035 flow, removed 5 selfloop flow, removed 9 redundant places. [2024-06-03 18:39:26,989 INFO L231 Difference]: Finished difference. Result has 378 places, 432 transitions, 5111 flow [2024-06-03 18:39:26,990 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4956, PETRI_DIFFERENCE_MINUEND_PLACES=368, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=429, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=381, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5111, PETRI_PLACES=378, PETRI_TRANSITIONS=432} [2024-06-03 18:39:26,990 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 336 predicate places. [2024-06-03 18:39:26,990 INFO L495 AbstractCegarLoop]: Abstraction has has 378 places, 432 transitions, 5111 flow [2024-06-03 18:39:26,990 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:39:26,990 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:39:26,990 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:39:26,990 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable128 [2024-06-03 18:39:26,991 INFO L420 AbstractCegarLoop]: === Iteration 130 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 18:39:26,991 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:39:26,991 INFO L85 PathProgramCache]: Analyzing trace with hash 246775973, now seen corresponding path program 6 times [2024-06-03 18:39:26,991 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:39:26,991 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [892485066] [2024-06-03 18:39:26,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:39:26,991 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:39:26,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:39:27,123 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:39:27,123 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:39:27,123 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [892485066] [2024-06-03 18:39:27,123 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [892485066] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:39:27,123 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:39:27,123 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 18:39:27,124 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [866009259] [2024-06-03 18:39:27,124 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:39:27,124 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 18:39:27,124 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:39:27,124 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 18:39:27,124 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-03 18:39:27,182 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 18:39:27,183 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 378 places, 432 transitions, 5111 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:39:27,183 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:39:27,183 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 18:39:27,183 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:39:28,003 INFO L124 PetriNetUnfolderBase]: 2594/4358 cut-off events. [2024-06-03 18:39:28,003 INFO L125 PetriNetUnfolderBase]: For 624888/624900 co-relation queries the response was YES. [2024-06-03 18:39:28,043 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36209 conditions, 4358 events. 2594/4358 cut-off events. For 624888/624900 co-relation queries the response was YES. Maximal size of possible extension queue 349. Compared 27868 event pairs, 621 based on Foata normal form. 18/4374 useless extension candidates. Maximal degree in co-relation 36036. Up to 3788 conditions per place. [2024-06-03 18:39:28,060 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 368 selfloop transitions, 91 changer transitions 0/465 dead transitions. [2024-06-03 18:39:28,061 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 389 places, 465 transitions, 6200 flow [2024-06-03 18:39:28,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-03 18:39:28,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-03 18:39:28,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 249 transitions. [2024-06-03 18:39:28,061 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5060975609756098 [2024-06-03 18:39:28,061 INFO L175 Difference]: Start difference. First operand has 378 places, 432 transitions, 5111 flow. Second operand 12 states and 249 transitions. [2024-06-03 18:39:28,061 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 389 places, 465 transitions, 6200 flow [2024-06-03 18:39:30,473 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 383 places, 465 transitions, 6102 flow, removed 5 selfloop flow, removed 6 redundant places. [2024-06-03 18:39:30,478 INFO L231 Difference]: Finished difference. Result has 384 places, 433 transitions, 5232 flow [2024-06-03 18:39:30,478 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5013, PETRI_DIFFERENCE_MINUEND_PLACES=372, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=432, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=90, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=341, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=5232, PETRI_PLACES=384, PETRI_TRANSITIONS=433} [2024-06-03 18:39:30,478 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 342 predicate places. [2024-06-03 18:39:30,478 INFO L495 AbstractCegarLoop]: Abstraction has has 384 places, 433 transitions, 5232 flow [2024-06-03 18:39:30,479 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:39:30,479 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:39:30,479 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:39:30,479 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable129 [2024-06-03 18:39:30,479 INFO L420 AbstractCegarLoop]: === Iteration 131 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 18:39:30,479 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:39:30,479 INFO L85 PathProgramCache]: Analyzing trace with hash -1103154527, now seen corresponding path program 7 times [2024-06-03 18:39:30,479 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:39:30,479 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1671624514] [2024-06-03 18:39:30,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:39:30,479 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:39:30,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:39:30,603 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:39:30,603 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:39:30,603 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1671624514] [2024-06-03 18:39:30,603 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1671624514] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:39:30,603 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:39:30,603 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 18:39:30,603 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1247427685] [2024-06-03 18:39:30,603 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:39:30,603 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 18:39:30,603 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:39:30,603 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 18:39:30,603 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-03 18:39:30,654 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 18:39:30,654 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 384 places, 433 transitions, 5232 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:39:30,654 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:39:30,654 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 18:39:30,654 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:39:31,560 INFO L124 PetriNetUnfolderBase]: 2714/4548 cut-off events. [2024-06-03 18:39:31,561 INFO L125 PetriNetUnfolderBase]: For 731907/731919 co-relation queries the response was YES. [2024-06-03 18:39:31,596 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39608 conditions, 4548 events. 2714/4548 cut-off events. For 731907/731919 co-relation queries the response was YES. Maximal size of possible extension queue 363. Compared 29256 event pairs, 655 based on Foata normal form. 20/4568 useless extension candidates. Maximal degree in co-relation 39434. Up to 3822 conditions per place. [2024-06-03 18:39:31,612 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 371 selfloop transitions, 88 changer transitions 0/465 dead transitions. [2024-06-03 18:39:31,612 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 393 places, 465 transitions, 6595 flow [2024-06-03 18:39:31,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 18:39:31,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 18:39:31,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 215 transitions. [2024-06-03 18:39:31,612 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.524390243902439 [2024-06-03 18:39:31,612 INFO L175 Difference]: Start difference. First operand has 384 places, 433 transitions, 5232 flow. Second operand 10 states and 215 transitions. [2024-06-03 18:39:31,612 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 393 places, 465 transitions, 6595 flow [2024-06-03 18:39:34,639 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 384 places, 465 transitions, 6407 flow, removed 7 selfloop flow, removed 9 redundant places. [2024-06-03 18:39:34,644 INFO L231 Difference]: Finished difference. Result has 386 places, 436 transitions, 5333 flow [2024-06-03 18:39:34,644 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5044, PETRI_DIFFERENCE_MINUEND_PLACES=375, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=433, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=85, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=345, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5333, PETRI_PLACES=386, PETRI_TRANSITIONS=436} [2024-06-03 18:39:34,644 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 344 predicate places. [2024-06-03 18:39:34,644 INFO L495 AbstractCegarLoop]: Abstraction has has 386 places, 436 transitions, 5333 flow [2024-06-03 18:39:34,644 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:39:34,644 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:39:34,644 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:39:34,644 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130 [2024-06-03 18:39:34,644 INFO L420 AbstractCegarLoop]: === Iteration 132 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 18:39:34,645 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:39:34,645 INFO L85 PathProgramCache]: Analyzing trace with hash -1100297567, now seen corresponding path program 8 times [2024-06-03 18:39:34,645 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:39:34,645 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1991724977] [2024-06-03 18:39:34,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:39:34,645 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:39:34,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:39:34,781 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:39:34,782 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:39:34,782 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1991724977] [2024-06-03 18:39:34,782 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1991724977] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:39:34,782 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:39:34,782 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 18:39:34,782 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [551695064] [2024-06-03 18:39:34,782 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:39:34,782 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 18:39:34,782 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:39:34,782 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 18:39:34,782 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2024-06-03 18:39:34,827 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 18:39:34,827 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 386 places, 436 transitions, 5333 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:39:34,827 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:39:34,827 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 18:39:34,827 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:39:35,668 INFO L124 PetriNetUnfolderBase]: 2742/4592 cut-off events. [2024-06-03 18:39:35,668 INFO L125 PetriNetUnfolderBase]: For 749999/750011 co-relation queries the response was YES. [2024-06-03 18:39:35,710 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40329 conditions, 4592 events. 2742/4592 cut-off events. For 749999/750011 co-relation queries the response was YES. Maximal size of possible extension queue 367. Compared 29671 event pairs, 675 based on Foata normal form. 20/4612 useless extension candidates. Maximal degree in co-relation 40153. Up to 4046 conditions per place. [2024-06-03 18:39:35,728 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 370 selfloop transitions, 85 changer transitions 0/461 dead transitions. [2024-06-03 18:39:35,728 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 395 places, 461 transitions, 6379 flow [2024-06-03 18:39:35,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 18:39:35,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 18:39:35,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 211 transitions. [2024-06-03 18:39:35,728 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5146341463414634 [2024-06-03 18:39:35,728 INFO L175 Difference]: Start difference. First operand has 386 places, 436 transitions, 5333 flow. Second operand 10 states and 211 transitions. [2024-06-03 18:39:35,728 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 395 places, 461 transitions, 6379 flow [2024-06-03 18:39:38,492 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 388 places, 461 transitions, 6202 flow, removed 8 selfloop flow, removed 7 redundant places. [2024-06-03 18:39:38,497 INFO L231 Difference]: Finished difference. Result has 389 places, 437 transitions, 5369 flow [2024-06-03 18:39:38,497 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5159, PETRI_DIFFERENCE_MINUEND_PLACES=379, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=436, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=84, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=351, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5369, PETRI_PLACES=389, PETRI_TRANSITIONS=437} [2024-06-03 18:39:38,497 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 347 predicate places. [2024-06-03 18:39:38,498 INFO L495 AbstractCegarLoop]: Abstraction has has 389 places, 437 transitions, 5369 flow [2024-06-03 18:39:38,498 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:39:38,498 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:39:38,498 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:39:38,498 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131 [2024-06-03 18:39:38,498 INFO L420 AbstractCegarLoop]: === Iteration 133 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 18:39:38,498 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:39:38,498 INFO L85 PathProgramCache]: Analyzing trace with hash -2069416019, now seen corresponding path program 10 times [2024-06-03 18:39:38,499 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:39:38,499 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [109796634] [2024-06-03 18:39:38,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:39:38,499 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:39:38,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:39:38,647 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:39:38,647 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:39:38,647 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [109796634] [2024-06-03 18:39:38,647 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [109796634] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:39:38,647 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:39:38,647 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 18:39:38,647 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [320653831] [2024-06-03 18:39:38,647 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:39:38,647 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 18:39:38,647 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:39:38,648 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 18:39:38,648 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-03 18:39:38,691 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 18:39:38,692 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 389 places, 437 transitions, 5369 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:39:38,692 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:39:38,692 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 18:39:38,692 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:39:39,544 INFO L124 PetriNetUnfolderBase]: 2770/4636 cut-off events. [2024-06-03 18:39:39,544 INFO L125 PetriNetUnfolderBase]: For 764773/764785 co-relation queries the response was YES. [2024-06-03 18:39:39,586 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40624 conditions, 4636 events. 2770/4636 cut-off events. For 764773/764785 co-relation queries the response was YES. Maximal size of possible extension queue 370. Compared 30017 event pairs, 679 based on Foata normal form. 20/4656 useless extension candidates. Maximal degree in co-relation 40447. Up to 4133 conditions per place. [2024-06-03 18:39:39,603 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 404 selfloop transitions, 51 changer transitions 0/461 dead transitions. [2024-06-03 18:39:39,603 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 397 places, 461 transitions, 6395 flow [2024-06-03 18:39:39,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 18:39:39,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 18:39:39,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 190 transitions. [2024-06-03 18:39:39,604 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5149051490514905 [2024-06-03 18:39:39,604 INFO L175 Difference]: Start difference. First operand has 389 places, 437 transitions, 5369 flow. Second operand 9 states and 190 transitions. [2024-06-03 18:39:39,604 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 397 places, 461 transitions, 6395 flow [2024-06-03 18:39:42,489 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 389 places, 461 transitions, 6216 flow, removed 6 selfloop flow, removed 8 redundant places. [2024-06-03 18:39:42,494 INFO L231 Difference]: Finished difference. Result has 390 places, 438 transitions, 5321 flow [2024-06-03 18:39:42,494 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5190, PETRI_DIFFERENCE_MINUEND_PLACES=381, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=437, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=386, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5321, PETRI_PLACES=390, PETRI_TRANSITIONS=438} [2024-06-03 18:39:42,494 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 348 predicate places. [2024-06-03 18:39:42,494 INFO L495 AbstractCegarLoop]: Abstraction has has 390 places, 438 transitions, 5321 flow [2024-06-03 18:39:42,494 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:39:42,494 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:39:42,494 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:39:42,494 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132 [2024-06-03 18:39:42,494 INFO L420 AbstractCegarLoop]: === Iteration 134 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 18:39:42,495 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:39:42,495 INFO L85 PathProgramCache]: Analyzing trace with hash -1328525333, now seen corresponding path program 11 times [2024-06-03 18:39:42,495 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:39:42,495 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [967299527] [2024-06-03 18:39:42,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:39:42,495 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:39:42,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:39:42,634 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:39:42,635 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:39:42,635 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [967299527] [2024-06-03 18:39:42,635 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [967299527] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:39:42,635 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:39:42,635 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 18:39:42,635 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1811943094] [2024-06-03 18:39:42,635 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:39:42,635 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 18:39:42,635 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:39:42,635 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 18:39:42,635 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-03 18:39:42,686 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 18:39:42,686 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 390 places, 438 transitions, 5321 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:39:42,687 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:39:42,687 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 18:39:42,687 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:39:43,691 INFO L124 PetriNetUnfolderBase]: 2798/4682 cut-off events. [2024-06-03 18:39:43,691 INFO L125 PetriNetUnfolderBase]: For 767991/768003 co-relation queries the response was YES. [2024-06-03 18:39:43,726 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40927 conditions, 4682 events. 2798/4682 cut-off events. For 767991/768003 co-relation queries the response was YES. Maximal size of possible extension queue 373. Compared 30340 event pairs, 677 based on Foata normal form. 18/4698 useless extension candidates. Maximal degree in co-relation 40749. Up to 4147 conditions per place. [2024-06-03 18:39:43,741 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 408 selfloop transitions, 54 changer transitions 0/468 dead transitions. [2024-06-03 18:39:43,742 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 399 places, 468 transitions, 6414 flow [2024-06-03 18:39:43,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 18:39:43,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 18:39:43,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 209 transitions. [2024-06-03 18:39:43,742 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5097560975609756 [2024-06-03 18:39:43,742 INFO L175 Difference]: Start difference. First operand has 390 places, 438 transitions, 5321 flow. Second operand 10 states and 209 transitions. [2024-06-03 18:39:43,742 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 399 places, 468 transitions, 6414 flow [2024-06-03 18:39:46,535 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 392 places, 468 transitions, 6307 flow, removed 4 selfloop flow, removed 7 redundant places. [2024-06-03 18:39:46,540 INFO L231 Difference]: Finished difference. Result has 394 places, 441 transitions, 5387 flow [2024-06-03 18:39:46,540 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5214, PETRI_DIFFERENCE_MINUEND_PLACES=383, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=438, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=384, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5387, PETRI_PLACES=394, PETRI_TRANSITIONS=441} [2024-06-03 18:39:46,540 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 352 predicate places. [2024-06-03 18:39:46,541 INFO L495 AbstractCegarLoop]: Abstraction has has 394 places, 441 transitions, 5387 flow [2024-06-03 18:39:46,541 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:39:46,541 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:39:46,541 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:39:46,541 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable133 [2024-06-03 18:39:46,541 INFO L420 AbstractCegarLoop]: === Iteration 135 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 18:39:46,541 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:39:46,541 INFO L85 PathProgramCache]: Analyzing trace with hash -523489759, now seen corresponding path program 9 times [2024-06-03 18:39:46,541 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:39:46,541 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1981905956] [2024-06-03 18:39:46,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:39:46,541 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:39:46,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:39:46,687 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:39:46,687 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:39:46,687 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1981905956] [2024-06-03 18:39:46,687 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1981905956] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:39:46,687 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:39:46,687 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 18:39:46,687 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [607482482] [2024-06-03 18:39:46,687 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:39:46,687 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 18:39:46,687 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:39:46,688 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 18:39:46,688 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-03 18:39:46,747 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 18:39:46,747 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 394 places, 441 transitions, 5387 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:39:46,747 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:39:46,747 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 18:39:46,747 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:39:47,670 INFO L124 PetriNetUnfolderBase]: 2933/4891 cut-off events. [2024-06-03 18:39:47,670 INFO L125 PetriNetUnfolderBase]: For 883904/883916 co-relation queries the response was YES. [2024-06-03 18:39:47,717 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44623 conditions, 4891 events. 2933/4891 cut-off events. For 883904/883916 co-relation queries the response was YES. Maximal size of possible extension queue 387. Compared 31818 event pairs, 677 based on Foata normal form. 18/4903 useless extension candidates. Maximal degree in co-relation 44443. Up to 3912 conditions per place. [2024-06-03 18:39:47,738 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 373 selfloop transitions, 103 changer transitions 0/482 dead transitions. [2024-06-03 18:39:47,738 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 404 places, 482 transitions, 7085 flow [2024-06-03 18:39:47,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-03 18:39:47,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-03 18:39:47,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 235 transitions. [2024-06-03 18:39:47,739 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5210643015521065 [2024-06-03 18:39:47,739 INFO L175 Difference]: Start difference. First operand has 394 places, 441 transitions, 5387 flow. Second operand 11 states and 235 transitions. [2024-06-03 18:39:47,739 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 404 places, 482 transitions, 7085 flow [2024-06-03 18:39:51,079 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 397 places, 482 transitions, 6969 flow, removed 8 selfloop flow, removed 7 redundant places. [2024-06-03 18:39:51,084 INFO L231 Difference]: Finished difference. Result has 400 places, 449 transitions, 5697 flow [2024-06-03 18:39:51,084 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5271, PETRI_DIFFERENCE_MINUEND_PLACES=387, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=441, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=96, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=339, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=5697, PETRI_PLACES=400, PETRI_TRANSITIONS=449} [2024-06-03 18:39:51,085 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 358 predicate places. [2024-06-03 18:39:51,085 INFO L495 AbstractCegarLoop]: Abstraction has has 400 places, 449 transitions, 5697 flow [2024-06-03 18:39:51,085 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:39:51,085 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:39:51,085 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:39:51,085 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable134 [2024-06-03 18:39:51,085 INFO L420 AbstractCegarLoop]: === Iteration 136 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 18:39:51,085 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:39:51,085 INFO L85 PathProgramCache]: Analyzing trace with hash -523727095, now seen corresponding path program 12 times [2024-06-03 18:39:51,085 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:39:51,085 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [379096009] [2024-06-03 18:39:51,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:39:51,085 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:39:51,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:39:51,221 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:39:51,221 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:39:51,221 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [379096009] [2024-06-03 18:39:51,221 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [379096009] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:39:51,221 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:39:51,221 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 18:39:51,221 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [568917935] [2024-06-03 18:39:51,221 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:39:51,221 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 18:39:51,221 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:39:51,222 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 18:39:51,222 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-03 18:39:51,271 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 18:39:51,271 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 400 places, 449 transitions, 5697 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:39:51,271 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:39:51,271 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 18:39:51,271 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:39:52,195 INFO L124 PetriNetUnfolderBase]: 2999/4997 cut-off events. [2024-06-03 18:39:52,195 INFO L125 PetriNetUnfolderBase]: For 952916/952928 co-relation queries the response was YES. [2024-06-03 18:39:52,243 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46820 conditions, 4997 events. 2999/4997 cut-off events. For 952916/952928 co-relation queries the response was YES. Maximal size of possible extension queue 391. Compared 32670 event pairs, 738 based on Foata normal form. 18/5005 useless extension candidates. Maximal degree in co-relation 46637. Up to 4298 conditions per place. [2024-06-03 18:39:52,262 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 411 selfloop transitions, 62 changer transitions 0/479 dead transitions. [2024-06-03 18:39:52,262 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 408 places, 479 transitions, 7017 flow [2024-06-03 18:39:52,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 18:39:52,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 18:39:52,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 194 transitions. [2024-06-03 18:39:52,263 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5257452574525745 [2024-06-03 18:39:52,263 INFO L175 Difference]: Start difference. First operand has 400 places, 449 transitions, 5697 flow. Second operand 9 states and 194 transitions. [2024-06-03 18:39:52,263 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 408 places, 479 transitions, 7017 flow [2024-06-03 18:39:55,913 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 402 places, 479 transitions, 6880 flow, removed 17 selfloop flow, removed 6 redundant places. [2024-06-03 18:39:55,919 INFO L231 Difference]: Finished difference. Result has 404 places, 451 transitions, 5752 flow [2024-06-03 18:39:55,919 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5560, PETRI_DIFFERENCE_MINUEND_PLACES=394, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=449, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=387, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5752, PETRI_PLACES=404, PETRI_TRANSITIONS=451} [2024-06-03 18:39:55,919 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 362 predicate places. [2024-06-03 18:39:55,919 INFO L495 AbstractCegarLoop]: Abstraction has has 404 places, 451 transitions, 5752 flow [2024-06-03 18:39:55,919 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:39:55,919 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:39:55,920 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:39:55,920 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable135 [2024-06-03 18:39:55,920 INFO L420 AbstractCegarLoop]: === Iteration 137 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 18:39:55,920 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:39:55,920 INFO L85 PathProgramCache]: Analyzing trace with hash -1328525147, now seen corresponding path program 10 times [2024-06-03 18:39:55,920 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:39:55,920 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1329310745] [2024-06-03 18:39:55,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:39:55,921 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:39:55,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:39:56,064 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:39:56,064 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:39:56,064 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1329310745] [2024-06-03 18:39:56,064 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1329310745] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:39:56,064 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:39:56,064 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 18:39:56,064 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [759036688] [2024-06-03 18:39:56,064 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:39:56,065 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 18:39:56,065 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:39:56,065 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 18:39:56,065 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-03 18:39:56,118 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 18:39:56,128 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 404 places, 451 transitions, 5752 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:39:56,128 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:39:56,128 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 18:39:56,128 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:39:57,152 INFO L124 PetriNetUnfolderBase]: 2986/4990 cut-off events. [2024-06-03 18:39:57,152 INFO L125 PetriNetUnfolderBase]: For 930692/930704 co-relation queries the response was YES. [2024-06-03 18:39:57,199 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46315 conditions, 4990 events. 2986/4990 cut-off events. For 930692/930704 co-relation queries the response was YES. Maximal size of possible extension queue 392. Compared 32775 event pairs, 743 based on Foata normal form. 18/5006 useless extension candidates. Maximal degree in co-relation 46129. Up to 4346 conditions per place. [2024-06-03 18:39:57,219 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 385 selfloop transitions, 90 changer transitions 0/481 dead transitions. [2024-06-03 18:39:57,219 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 415 places, 481 transitions, 7050 flow [2024-06-03 18:39:57,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-03 18:39:57,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-03 18:39:57,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 248 transitions. [2024-06-03 18:39:57,219 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5040650406504065 [2024-06-03 18:39:57,219 INFO L175 Difference]: Start difference. First operand has 404 places, 451 transitions, 5752 flow. Second operand 12 states and 248 transitions. [2024-06-03 18:39:57,220 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 415 places, 481 transitions, 7050 flow [2024-06-03 18:40:01,787 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 410 places, 481 transitions, 6939 flow, removed 6 selfloop flow, removed 5 redundant places. [2024-06-03 18:40:01,792 INFO L231 Difference]: Finished difference. Result has 411 places, 451 transitions, 5825 flow [2024-06-03 18:40:01,792 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5641, PETRI_DIFFERENCE_MINUEND_PLACES=399, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=451, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=90, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=361, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=5825, PETRI_PLACES=411, PETRI_TRANSITIONS=451} [2024-06-03 18:40:01,792 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 369 predicate places. [2024-06-03 18:40:01,792 INFO L495 AbstractCegarLoop]: Abstraction has has 411 places, 451 transitions, 5825 flow [2024-06-03 18:40:01,792 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:40:01,793 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:40:01,793 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:40:01,793 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable136 [2024-06-03 18:40:01,793 INFO L420 AbstractCegarLoop]: === Iteration 138 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 18:40:01,793 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:40:01,793 INFO L85 PathProgramCache]: Analyzing trace with hash -521843659, now seen corresponding path program 11 times [2024-06-03 18:40:01,793 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:40:01,793 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [238097992] [2024-06-03 18:40:01,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:40:01,793 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:40:01,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:40:01,932 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:40:01,932 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:40:01,932 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [238097992] [2024-06-03 18:40:01,932 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [238097992] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:40:01,932 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:40:01,932 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 18:40:01,932 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1326334849] [2024-06-03 18:40:01,933 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:40:01,933 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 18:40:01,933 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:40:01,933 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 18:40:01,933 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2024-06-03 18:40:01,988 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 18:40:01,988 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 411 places, 451 transitions, 5825 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:40:01,988 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:40:01,988 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 18:40:01,988 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:40:03,070 INFO L124 PetriNetUnfolderBase]: 2968/4962 cut-off events. [2024-06-03 18:40:03,070 INFO L125 PetriNetUnfolderBase]: For 912915/912927 co-relation queries the response was YES. [2024-06-03 18:40:03,109 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45318 conditions, 4962 events. 2968/4962 cut-off events. For 912915/912927 co-relation queries the response was YES. Maximal size of possible extension queue 392. Compared 32561 event pairs, 741 based on Foata normal form. 20/4982 useless extension candidates. Maximal degree in co-relation 45131. Up to 4400 conditions per place. [2024-06-03 18:40:03,127 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 385 selfloop transitions, 86 changer transitions 0/477 dead transitions. [2024-06-03 18:40:03,127 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 422 places, 477 transitions, 6871 flow [2024-06-03 18:40:03,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-03 18:40:03,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-03 18:40:03,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 245 transitions. [2024-06-03 18:40:03,128 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49796747967479676 [2024-06-03 18:40:03,128 INFO L175 Difference]: Start difference. First operand has 411 places, 451 transitions, 5825 flow. Second operand 12 states and 245 transitions. [2024-06-03 18:40:03,129 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 422 places, 477 transitions, 6871 flow [2024-06-03 18:40:07,391 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 413 places, 477 transitions, 6678 flow, removed 12 selfloop flow, removed 9 redundant places. [2024-06-03 18:40:07,396 INFO L231 Difference]: Finished difference. Result has 414 places, 451 transitions, 5809 flow [2024-06-03 18:40:07,396 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5632, PETRI_DIFFERENCE_MINUEND_PLACES=402, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=451, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=86, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=365, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=5809, PETRI_PLACES=414, PETRI_TRANSITIONS=451} [2024-06-03 18:40:07,396 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 372 predicate places. [2024-06-03 18:40:07,397 INFO L495 AbstractCegarLoop]: Abstraction has has 414 places, 451 transitions, 5809 flow [2024-06-03 18:40:07,397 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:40:07,397 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:40:07,397 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:40:07,397 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137 [2024-06-03 18:40:07,397 INFO L420 AbstractCegarLoop]: === Iteration 139 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 18:40:07,397 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:40:07,397 INFO L85 PathProgramCache]: Analyzing trace with hash -523726909, now seen corresponding path program 12 times [2024-06-03 18:40:07,398 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:40:07,398 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [890992653] [2024-06-03 18:40:07,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:40:07,398 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:40:07,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:40:07,540 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:40:07,541 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:40:07,541 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [890992653] [2024-06-03 18:40:07,541 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [890992653] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:40:07,541 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:40:07,541 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 18:40:07,541 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [363934729] [2024-06-03 18:40:07,541 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:40:07,541 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 18:40:07,541 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:40:07,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 18:40:07,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-03 18:40:07,583 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 18:40:07,583 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 414 places, 451 transitions, 5809 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:40:07,583 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:40:07,583 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 18:40:07,583 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:40:08,535 INFO L124 PetriNetUnfolderBase]: 2955/4937 cut-off events. [2024-06-03 18:40:08,535 INFO L125 PetriNetUnfolderBase]: For 879624/879636 co-relation queries the response was YES. [2024-06-03 18:40:08,583 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44487 conditions, 4937 events. 2955/4937 cut-off events. For 879624/879636 co-relation queries the response was YES. Maximal size of possible extension queue 391. Compared 32303 event pairs, 690 based on Foata normal form. 18/4947 useless extension candidates. Maximal degree in co-relation 44299. Up to 3994 conditions per place. [2024-06-03 18:40:08,602 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 377 selfloop transitions, 101 changer transitions 0/484 dead transitions. [2024-06-03 18:40:08,602 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 424 places, 484 transitions, 7167 flow [2024-06-03 18:40:08,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-03 18:40:08,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-03 18:40:08,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 235 transitions. [2024-06-03 18:40:08,603 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5210643015521065 [2024-06-03 18:40:08,603 INFO L175 Difference]: Start difference. First operand has 414 places, 451 transitions, 5809 flow. Second operand 11 states and 235 transitions. [2024-06-03 18:40:08,603 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 424 places, 484 transitions, 7167 flow [2024-06-03 18:40:13,166 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 414 places, 484 transitions, 6996 flow, removed 1 selfloop flow, removed 10 redundant places. [2024-06-03 18:40:13,171 INFO L231 Difference]: Finished difference. Result has 415 places, 451 transitions, 5844 flow [2024-06-03 18:40:13,171 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5638, PETRI_DIFFERENCE_MINUEND_PLACES=404, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=451, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=101, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=350, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=5844, PETRI_PLACES=415, PETRI_TRANSITIONS=451} [2024-06-03 18:40:13,171 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 373 predicate places. [2024-06-03 18:40:13,171 INFO L495 AbstractCegarLoop]: Abstraction has has 415 places, 451 transitions, 5844 flow [2024-06-03 18:40:13,171 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:40:13,171 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:40:13,172 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:40:13,172 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable138 [2024-06-03 18:40:13,172 INFO L420 AbstractCegarLoop]: === Iteration 140 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 18:40:13,172 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:40:13,172 INFO L85 PathProgramCache]: Analyzing trace with hash -426455355, now seen corresponding path program 13 times [2024-06-03 18:40:13,172 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:40:13,172 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [843703082] [2024-06-03 18:40:13,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:40:13,172 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:40:13,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:40:13,306 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:40:13,306 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:40:13,306 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [843703082] [2024-06-03 18:40:13,306 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [843703082] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:40:13,306 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:40:13,306 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 18:40:13,306 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1508248885] [2024-06-03 18:40:13,306 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:40:13,306 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 18:40:13,306 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:40:13,306 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 18:40:13,307 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-03 18:40:13,393 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 18:40:13,393 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 415 places, 451 transitions, 5844 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:40:13,393 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:40:13,393 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 18:40:13,393 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:40:14,380 INFO L124 PetriNetUnfolderBase]: 3062/5111 cut-off events. [2024-06-03 18:40:14,380 INFO L125 PetriNetUnfolderBase]: For 998019/998027 co-relation queries the response was YES. [2024-06-03 18:40:14,430 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47561 conditions, 5111 events. 3062/5111 cut-off events. For 998019/998027 co-relation queries the response was YES. Maximal size of possible extension queue 405. Compared 33651 event pairs, 776 based on Foata normal form. 16/5126 useless extension candidates. Maximal degree in co-relation 47372. Up to 4312 conditions per place. [2024-06-03 18:40:14,451 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 406 selfloop transitions, 74 changer transitions 0/486 dead transitions. [2024-06-03 18:40:14,451 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 421 places, 486 transitions, 7250 flow [2024-06-03 18:40:14,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 18:40:14,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 18:40:14,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 168 transitions. [2024-06-03 18:40:14,451 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5853658536585366 [2024-06-03 18:40:14,451 INFO L175 Difference]: Start difference. First operand has 415 places, 451 transitions, 5844 flow. Second operand 7 states and 168 transitions. [2024-06-03 18:40:14,451 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 421 places, 486 transitions, 7250 flow [2024-06-03 18:40:19,098 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 413 places, 486 transitions, 7067 flow, removed 5 selfloop flow, removed 8 redundant places. [2024-06-03 18:40:19,103 INFO L231 Difference]: Finished difference. Result has 415 places, 454 transitions, 5898 flow [2024-06-03 18:40:19,103 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5661, PETRI_DIFFERENCE_MINUEND_PLACES=407, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=451, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=378, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5898, PETRI_PLACES=415, PETRI_TRANSITIONS=454} [2024-06-03 18:40:19,103 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 373 predicate places. [2024-06-03 18:40:19,103 INFO L495 AbstractCegarLoop]: Abstraction has has 415 places, 454 transitions, 5898 flow [2024-06-03 18:40:19,103 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:40:19,103 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:40:19,103 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:40:19,103 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable139 [2024-06-03 18:40:19,108 INFO L420 AbstractCegarLoop]: === Iteration 141 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 18:40:19,108 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:40:19,108 INFO L85 PathProgramCache]: Analyzing trace with hash -564744495, now seen corresponding path program 14 times [2024-06-03 18:40:19,108 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:40:19,108 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [407797222] [2024-06-03 18:40:19,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:40:19,108 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:40:19,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:40:19,245 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:40:19,245 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:40:19,245 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [407797222] [2024-06-03 18:40:19,245 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [407797222] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:40:19,245 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:40:19,245 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 18:40:19,246 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [953823873] [2024-06-03 18:40:19,246 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:40:19,246 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 18:40:19,246 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:40:19,246 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 18:40:19,246 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-03 18:40:19,289 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 18:40:19,290 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 415 places, 454 transitions, 5898 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:40:19,290 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:40:19,290 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 18:40:19,290 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:40:20,266 INFO L124 PetriNetUnfolderBase]: 3090/5151 cut-off events. [2024-06-03 18:40:20,266 INFO L125 PetriNetUnfolderBase]: For 1016131/1016139 co-relation queries the response was YES. [2024-06-03 18:40:20,316 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48049 conditions, 5151 events. 3090/5151 cut-off events. For 1016131/1016139 co-relation queries the response was YES. Maximal size of possible extension queue 409. Compared 33894 event pairs, 794 based on Foata normal form. 16/5166 useless extension candidates. Maximal degree in co-relation 47858. Up to 4564 conditions per place. [2024-06-03 18:40:20,337 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 401 selfloop transitions, 72 changer transitions 0/479 dead transitions. [2024-06-03 18:40:20,337 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 421 places, 479 transitions, 6969 flow [2024-06-03 18:40:20,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 18:40:20,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 18:40:20,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 161 transitions. [2024-06-03 18:40:20,338 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5609756097560976 [2024-06-03 18:40:20,338 INFO L175 Difference]: Start difference. First operand has 415 places, 454 transitions, 5898 flow. Second operand 7 states and 161 transitions. [2024-06-03 18:40:20,338 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 421 places, 479 transitions, 6969 flow [2024-06-03 18:40:25,008 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 418 places, 479 transitions, 6859 flow, removed 14 selfloop flow, removed 3 redundant places. [2024-06-03 18:40:25,013 INFO L231 Difference]: Finished difference. Result has 419 places, 455 transitions, 5966 flow [2024-06-03 18:40:25,013 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5794, PETRI_DIFFERENCE_MINUEND_PLACES=412, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=454, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=382, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5966, PETRI_PLACES=419, PETRI_TRANSITIONS=455} [2024-06-03 18:40:25,014 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 377 predicate places. [2024-06-03 18:40:25,014 INFO L495 AbstractCegarLoop]: Abstraction has has 419 places, 455 transitions, 5966 flow [2024-06-03 18:40:25,014 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:40:25,014 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:40:25,014 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:40:25,014 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140 [2024-06-03 18:40:25,014 INFO L420 AbstractCegarLoop]: === Iteration 142 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 18:40:25,014 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:40:25,014 INFO L85 PathProgramCache]: Analyzing trace with hash -568558425, now seen corresponding path program 15 times [2024-06-03 18:40:25,014 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:40:25,014 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [148322527] [2024-06-03 18:40:25,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:40:25,014 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:40:25,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:40:25,147 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:40:25,147 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:40:25,147 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [148322527] [2024-06-03 18:40:25,147 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [148322527] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:40:25,147 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:40:25,147 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 18:40:25,147 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [348159900] [2024-06-03 18:40:25,147 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:40:25,148 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 18:40:25,148 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:40:25,148 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 18:40:25,148 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-03 18:40:25,201 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 18:40:25,201 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 419 places, 455 transitions, 5966 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:40:25,201 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:40:25,201 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 18:40:25,201 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:40:26,293 INFO L124 PetriNetUnfolderBase]: 3143/5242 cut-off events. [2024-06-03 18:40:26,294 INFO L125 PetriNetUnfolderBase]: For 1057623/1057631 co-relation queries the response was YES. [2024-06-03 18:40:26,342 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49442 conditions, 5242 events. 3143/5242 cut-off events. For 1057623/1057631 co-relation queries the response was YES. Maximal size of possible extension queue 415. Compared 34687 event pairs, 597 based on Foata normal form. 14/5255 useless extension candidates. Maximal degree in co-relation 49249. Up to 3931 conditions per place. [2024-06-03 18:40:26,363 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 395 selfloop transitions, 91 changer transitions 0/492 dead transitions. [2024-06-03 18:40:26,363 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 425 places, 492 transitions, 7596 flow [2024-06-03 18:40:26,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 18:40:26,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 18:40:26,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 171 transitions. [2024-06-03 18:40:26,364 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5958188153310104 [2024-06-03 18:40:26,364 INFO L175 Difference]: Start difference. First operand has 419 places, 455 transitions, 5966 flow. Second operand 7 states and 171 transitions. [2024-06-03 18:40:26,364 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 425 places, 492 transitions, 7596 flow [2024-06-03 18:40:31,849 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 420 places, 492 transitions, 7449 flow, removed 3 selfloop flow, removed 5 redundant places. [2024-06-03 18:40:31,854 INFO L231 Difference]: Finished difference. Result has 421 places, 457 transitions, 6057 flow [2024-06-03 18:40:31,854 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5819, PETRI_DIFFERENCE_MINUEND_PLACES=414, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=455, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=89, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=366, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6057, PETRI_PLACES=421, PETRI_TRANSITIONS=457} [2024-06-03 18:40:31,854 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 379 predicate places. [2024-06-03 18:40:31,854 INFO L495 AbstractCegarLoop]: Abstraction has has 421 places, 457 transitions, 6057 flow [2024-06-03 18:40:31,854 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:40:31,855 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:40:31,855 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:40:31,855 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141 [2024-06-03 18:40:31,855 INFO L420 AbstractCegarLoop]: === Iteration 143 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 18:40:31,855 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:40:31,855 INFO L85 PathProgramCache]: Analyzing trace with hash 431824529, now seen corresponding path program 16 times [2024-06-03 18:40:31,855 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:40:31,855 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2112701274] [2024-06-03 18:40:31,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:40:31,855 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:40:31,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:40:31,989 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:40:31,989 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:40:31,989 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2112701274] [2024-06-03 18:40:31,990 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2112701274] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:40:31,990 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:40:31,990 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 18:40:31,990 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1059276076] [2024-06-03 18:40:31,990 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:40:31,990 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 18:40:31,990 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:40:31,990 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 18:40:31,990 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-03 18:40:32,042 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 18:40:32,042 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 421 places, 457 transitions, 6057 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:40:32,042 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:40:32,042 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 18:40:32,042 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:40:33,209 INFO L124 PetriNetUnfolderBase]: 3171/5283 cut-off events. [2024-06-03 18:40:33,210 INFO L125 PetriNetUnfolderBase]: For 1092533/1092545 co-relation queries the response was YES. [2024-06-03 18:40:33,256 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50161 conditions, 5283 events. 3171/5283 cut-off events. For 1092533/1092545 co-relation queries the response was YES. Maximal size of possible extension queue 419. Compared 34884 event pairs, 792 based on Foata normal form. 20/5303 useless extension candidates. Maximal degree in co-relation 49967. Up to 4515 conditions per place. [2024-06-03 18:40:33,276 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 415 selfloop transitions, 77 changer transitions 0/498 dead transitions. [2024-06-03 18:40:33,277 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 429 places, 498 transitions, 7471 flow [2024-06-03 18:40:33,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 18:40:33,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 18:40:33,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 209 transitions. [2024-06-03 18:40:33,277 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5663956639566395 [2024-06-03 18:40:33,277 INFO L175 Difference]: Start difference. First operand has 421 places, 457 transitions, 6057 flow. Second operand 9 states and 209 transitions. [2024-06-03 18:40:33,277 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 429 places, 498 transitions, 7471 flow [2024-06-03 18:40:39,005 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 422 places, 498 transitions, 7127 flow, removed 22 selfloop flow, removed 7 redundant places. [2024-06-03 18:40:39,011 INFO L231 Difference]: Finished difference. Result has 423 places, 458 transitions, 5899 flow [2024-06-03 18:40:39,011 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5719, PETRI_DIFFERENCE_MINUEND_PLACES=414, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=457, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=381, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5899, PETRI_PLACES=423, PETRI_TRANSITIONS=458} [2024-06-03 18:40:39,011 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 381 predicate places. [2024-06-03 18:40:39,011 INFO L495 AbstractCegarLoop]: Abstraction has has 423 places, 458 transitions, 5899 flow [2024-06-03 18:40:39,011 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:40:39,011 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:40:39,011 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:40:39,011 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142 [2024-06-03 18:40:39,011 INFO L420 AbstractCegarLoop]: === Iteration 144 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 18:40:39,011 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:40:39,012 INFO L85 PathProgramCache]: Analyzing trace with hash -568438455, now seen corresponding path program 17 times [2024-06-03 18:40:39,012 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:40:39,012 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1375805244] [2024-06-03 18:40:39,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:40:39,012 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:40:39,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:40:39,163 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:40:39,163 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:40:39,163 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1375805244] [2024-06-03 18:40:39,163 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1375805244] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:40:39,163 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:40:39,164 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 18:40:39,164 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1366312410] [2024-06-03 18:40:39,164 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:40:39,164 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 18:40:39,164 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:40:39,164 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 18:40:39,164 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-03 18:40:39,216 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 18:40:39,216 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 423 places, 458 transitions, 5899 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:40:39,216 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:40:39,216 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 18:40:39,216 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:40:40,421 INFO L124 PetriNetUnfolderBase]: 3158/5268 cut-off events. [2024-06-03 18:40:40,421 INFO L125 PetriNetUnfolderBase]: For 1052391/1052403 co-relation queries the response was YES. [2024-06-03 18:40:40,463 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48537 conditions, 5268 events. 3158/5268 cut-off events. For 1052391/1052403 co-relation queries the response was YES. Maximal size of possible extension queue 418. Compared 34878 event pairs, 584 based on Foata normal form. 18/5286 useless extension candidates. Maximal degree in co-relation 48345. Up to 4688 conditions per place. [2024-06-03 18:40:40,481 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 431 selfloop transitions, 46 changer transitions 0/483 dead transitions. [2024-06-03 18:40:40,482 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 429 places, 483 transitions, 6931 flow [2024-06-03 18:40:40,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 18:40:40,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 18:40:40,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 160 transitions. [2024-06-03 18:40:40,482 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5574912891986062 [2024-06-03 18:40:40,482 INFO L175 Difference]: Start difference. First operand has 423 places, 458 transitions, 5899 flow. Second operand 7 states and 160 transitions. [2024-06-03 18:40:40,482 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 429 places, 483 transitions, 6931 flow [2024-06-03 18:40:45,721 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 421 places, 483 transitions, 6671 flow, removed 11 selfloop flow, removed 8 redundant places. [2024-06-03 18:40:45,726 INFO L231 Difference]: Finished difference. Result has 422 places, 458 transitions, 5735 flow [2024-06-03 18:40:45,726 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5639, PETRI_DIFFERENCE_MINUEND_PLACES=415, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=458, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=412, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5735, PETRI_PLACES=422, PETRI_TRANSITIONS=458} [2024-06-03 18:40:45,726 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 380 predicate places. [2024-06-03 18:40:45,727 INFO L495 AbstractCegarLoop]: Abstraction has has 422 places, 458 transitions, 5735 flow [2024-06-03 18:40:45,727 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:40:45,727 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:40:45,727 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:40:45,727 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143 [2024-06-03 18:40:45,727 INFO L420 AbstractCegarLoop]: === Iteration 145 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 18:40:45,727 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:40:45,727 INFO L85 PathProgramCache]: Analyzing trace with hash -568438269, now seen corresponding path program 13 times [2024-06-03 18:40:45,728 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:40:45,728 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [338365161] [2024-06-03 18:40:45,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:40:45,728 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:40:45,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:40:45,869 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:40:45,869 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:40:45,869 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [338365161] [2024-06-03 18:40:45,869 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [338365161] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:40:45,869 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:40:45,869 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 18:40:45,870 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [139273479] [2024-06-03 18:40:45,870 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:40:45,870 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 18:40:45,870 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:40:45,870 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 18:40:45,870 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-03 18:40:45,949 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 18:40:45,949 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 422 places, 458 transitions, 5735 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:40:45,949 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:40:45,949 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 18:40:45,949 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:40:47,056 INFO L124 PetriNetUnfolderBase]: 3145/5245 cut-off events. [2024-06-03 18:40:47,056 INFO L125 PetriNetUnfolderBase]: For 1028194/1028206 co-relation queries the response was YES. [2024-06-03 18:40:47,108 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47360 conditions, 5245 events. 3145/5245 cut-off events. For 1028194/1028206 co-relation queries the response was YES. Maximal size of possible extension queue 417. Compared 34711 event pairs, 568 based on Foata normal form. 18/5263 useless extension candidates. Maximal degree in co-relation 47168. Up to 4322 conditions per place. [2024-06-03 18:40:47,130 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 407 selfloop transitions, 75 changer transitions 0/488 dead transitions. [2024-06-03 18:40:47,130 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 429 places, 488 transitions, 7065 flow [2024-06-03 18:40:47,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 18:40:47,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 18:40:47,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 185 transitions. [2024-06-03 18:40:47,131 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5640243902439024 [2024-06-03 18:40:47,131 INFO L175 Difference]: Start difference. First operand has 422 places, 458 transitions, 5735 flow. Second operand 8 states and 185 transitions. [2024-06-03 18:40:47,131 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 429 places, 488 transitions, 7065 flow [2024-06-03 18:40:51,661 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 423 places, 488 transitions, 6953 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-06-03 18:40:51,666 INFO L231 Difference]: Finished difference. Result has 424 places, 458 transitions, 5779 flow [2024-06-03 18:40:51,667 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5623, PETRI_DIFFERENCE_MINUEND_PLACES=416, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=458, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=383, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5779, PETRI_PLACES=424, PETRI_TRANSITIONS=458} [2024-06-03 18:40:51,667 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 382 predicate places. [2024-06-03 18:40:51,667 INFO L495 AbstractCegarLoop]: Abstraction has has 424 places, 458 transitions, 5779 flow [2024-06-03 18:40:51,667 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:40:51,667 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:40:51,667 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:40:51,667 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable144 [2024-06-03 18:40:51,667 INFO L420 AbstractCegarLoop]: === Iteration 146 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 18:40:51,668 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:40:51,668 INFO L85 PathProgramCache]: Analyzing trace with hash 440395409, now seen corresponding path program 18 times [2024-06-03 18:40:51,668 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:40:51,668 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1635570823] [2024-06-03 18:40:51,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:40:51,668 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:40:51,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:40:51,815 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:40:51,815 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:40:51,815 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1635570823] [2024-06-03 18:40:51,815 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1635570823] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:40:51,815 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:40:51,815 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 18:40:51,815 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1694560811] [2024-06-03 18:40:51,815 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:40:51,816 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 18:40:51,816 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:40:51,816 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 18:40:51,816 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-03 18:40:51,861 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 18:40:51,861 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 424 places, 458 transitions, 5779 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:40:51,861 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:40:51,861 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 18:40:51,861 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:40:52,946 INFO L124 PetriNetUnfolderBase]: 3173/5289 cut-off events. [2024-06-03 18:40:52,946 INFO L125 PetriNetUnfolderBase]: For 1062009/1062021 co-relation queries the response was YES. [2024-06-03 18:40:52,999 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47925 conditions, 5289 events. 3173/5289 cut-off events. For 1062009/1062021 co-relation queries the response was YES. Maximal size of possible extension queue 423. Compared 34996 event pairs, 798 based on Foata normal form. 20/5309 useless extension candidates. Maximal degree in co-relation 47732. Up to 4697 conditions per place. [2024-06-03 18:40:53,021 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 408 selfloop transitions, 77 changer transitions 0/491 dead transitions. [2024-06-03 18:40:53,021 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 432 places, 491 transitions, 6883 flow [2024-06-03 18:40:53,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 18:40:53,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 18:40:53,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 202 transitions. [2024-06-03 18:40:53,021 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5474254742547425 [2024-06-03 18:40:53,021 INFO L175 Difference]: Start difference. First operand has 424 places, 458 transitions, 5779 flow. Second operand 9 states and 202 transitions. [2024-06-03 18:40:53,021 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 432 places, 491 transitions, 6883 flow [2024-06-03 18:40:57,855 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 423 places, 491 transitions, 6650 flow, removed 4 selfloop flow, removed 9 redundant places. [2024-06-03 18:40:57,860 INFO L231 Difference]: Finished difference. Result has 424 places, 459 transitions, 5723 flow [2024-06-03 18:40:57,861 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5546, PETRI_DIFFERENCE_MINUEND_PLACES=415, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=458, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=381, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5723, PETRI_PLACES=424, PETRI_TRANSITIONS=459} [2024-06-03 18:40:57,861 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 382 predicate places. [2024-06-03 18:40:57,861 INFO L495 AbstractCegarLoop]: Abstraction has has 424 places, 459 transitions, 5723 flow [2024-06-03 18:40:57,861 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:40:57,861 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:40:57,861 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:40:57,861 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable145 [2024-06-03 18:40:57,862 INFO L420 AbstractCegarLoop]: === Iteration 147 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 18:40:57,862 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:40:57,862 INFO L85 PathProgramCache]: Analyzing trace with hash -302414559, now seen corresponding path program 14 times [2024-06-03 18:40:57,862 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:40:57,862 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1432838311] [2024-06-03 18:40:57,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:40:57,862 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:40:57,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:40:58,007 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:40:58,007 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:40:58,007 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1432838311] [2024-06-03 18:40:58,007 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1432838311] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:40:58,007 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:40:58,007 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 18:40:58,007 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [963858308] [2024-06-03 18:40:58,007 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:40:58,007 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 18:40:58,007 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:40:58,008 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 18:40:58,008 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-03 18:40:58,053 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 18:40:58,053 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 424 places, 459 transitions, 5723 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:40:58,053 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:40:58,053 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 18:40:58,053 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:40:59,136 INFO L124 PetriNetUnfolderBase]: 3155/5267 cut-off events. [2024-06-03 18:40:59,136 INFO L125 PetriNetUnfolderBase]: For 1020669/1020681 co-relation queries the response was YES. [2024-06-03 18:40:59,189 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46577 conditions, 5267 events. 3155/5267 cut-off events. For 1020669/1020681 co-relation queries the response was YES. Maximal size of possible extension queue 423. Compared 34925 event pairs, 780 based on Foata normal form. 20/5287 useless extension candidates. Maximal degree in co-relation 46384. Up to 4701 conditions per place. [2024-06-03 18:40:59,211 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 416 selfloop transitions, 59 changer transitions 0/481 dead transitions. [2024-06-03 18:40:59,211 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 431 places, 481 transitions, 6769 flow [2024-06-03 18:40:59,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 18:40:59,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 18:40:59,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 178 transitions. [2024-06-03 18:40:59,211 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5426829268292683 [2024-06-03 18:40:59,211 INFO L175 Difference]: Start difference. First operand has 424 places, 459 transitions, 5723 flow. Second operand 8 states and 178 transitions. [2024-06-03 18:40:59,212 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 431 places, 481 transitions, 6769 flow [2024-06-03 18:41:04,188 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 424 places, 481 transitions, 6606 flow, removed 6 selfloop flow, removed 7 redundant places. [2024-06-03 18:41:04,192 INFO L231 Difference]: Finished difference. Result has 425 places, 459 transitions, 5686 flow [2024-06-03 18:41:04,193 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5560, PETRI_DIFFERENCE_MINUEND_PLACES=417, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=459, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=400, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5686, PETRI_PLACES=425, PETRI_TRANSITIONS=459} [2024-06-03 18:41:04,193 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 383 predicate places. [2024-06-03 18:41:04,193 INFO L495 AbstractCegarLoop]: Abstraction has has 425 places, 459 transitions, 5686 flow [2024-06-03 18:41:04,193 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:41:04,193 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:41:04,193 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:41:04,194 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable146 [2024-06-03 18:41:04,194 INFO L420 AbstractCegarLoop]: === Iteration 148 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 18:41:04,194 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:41:04,194 INFO L85 PathProgramCache]: Analyzing trace with hash -302593305, now seen corresponding path program 19 times [2024-06-03 18:41:04,194 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:41:04,194 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1808460930] [2024-06-03 18:41:04,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:41:04,194 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:41:04,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:41:04,352 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:41:04,352 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:41:04,352 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1808460930] [2024-06-03 18:41:04,352 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1808460930] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:41:04,352 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:41:04,353 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 18:41:04,353 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1842580061] [2024-06-03 18:41:04,353 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:41:04,353 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 18:41:04,353 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:41:04,353 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 18:41:04,353 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-03 18:41:04,400 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 18:41:04,401 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 425 places, 459 transitions, 5686 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:41:04,401 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:41:04,401 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 18:41:04,401 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:41:05,444 INFO L124 PetriNetUnfolderBase]: 3137/5237 cut-off events. [2024-06-03 18:41:05,444 INFO L125 PetriNetUnfolderBase]: For 981609/981621 co-relation queries the response was YES. [2024-06-03 18:41:05,497 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45493 conditions, 5237 events. 3137/5237 cut-off events. For 981609/981621 co-relation queries the response was YES. Maximal size of possible extension queue 423. Compared 34732 event pairs, 782 based on Foata normal form. 20/5257 useless extension candidates. Maximal degree in co-relation 45299. Up to 4738 conditions per place. [2024-06-03 18:41:05,518 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 439 selfloop transitions, 35 changer transitions 0/480 dead transitions. [2024-06-03 18:41:05,518 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 431 places, 480 transitions, 6724 flow [2024-06-03 18:41:05,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 18:41:05,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 18:41:05,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 156 transitions. [2024-06-03 18:41:05,519 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5435540069686411 [2024-06-03 18:41:05,519 INFO L175 Difference]: Start difference. First operand has 425 places, 459 transitions, 5686 flow. Second operand 7 states and 156 transitions. [2024-06-03 18:41:05,519 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 431 places, 480 transitions, 6724 flow [2024-06-03 18:41:10,225 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 424 places, 480 transitions, 6597 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-06-03 18:41:10,230 INFO L231 Difference]: Finished difference. Result has 425 places, 459 transitions, 5634 flow [2024-06-03 18:41:10,230 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5559, PETRI_DIFFERENCE_MINUEND_PLACES=418, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=459, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=424, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5634, PETRI_PLACES=425, PETRI_TRANSITIONS=459} [2024-06-03 18:41:10,231 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 383 predicate places. [2024-06-03 18:41:10,231 INFO L495 AbstractCegarLoop]: Abstraction has has 425 places, 459 transitions, 5634 flow [2024-06-03 18:41:10,231 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:41:10,231 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:41:10,231 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:41:10,231 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable147 [2024-06-03 18:41:10,231 INFO L420 AbstractCegarLoop]: === Iteration 149 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 18:41:10,232 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:41:10,232 INFO L85 PathProgramCache]: Analyzing trace with hash -302741175, now seen corresponding path program 20 times [2024-06-03 18:41:10,232 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:41:10,232 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1527164313] [2024-06-03 18:41:10,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:41:10,232 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:41:10,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:41:10,365 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:41:10,365 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:41:10,365 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1527164313] [2024-06-03 18:41:10,365 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1527164313] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:41:10,365 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:41:10,366 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 18:41:10,366 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [569371036] [2024-06-03 18:41:10,366 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:41:10,366 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 18:41:10,366 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:41:10,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 18:41:10,366 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-03 18:41:10,455 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 18:41:10,456 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 425 places, 459 transitions, 5634 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:41:10,456 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:41:10,456 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 18:41:10,456 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:41:11,519 INFO L124 PetriNetUnfolderBase]: 3124/5214 cut-off events. [2024-06-03 18:41:11,519 INFO L125 PetriNetUnfolderBase]: For 940929/940941 co-relation queries the response was YES. [2024-06-03 18:41:11,571 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44746 conditions, 5214 events. 3124/5214 cut-off events. For 940929/940941 co-relation queries the response was YES. Maximal size of possible extension queue 423. Compared 34548 event pairs, 763 based on Foata normal form. 18/5228 useless extension candidates. Maximal degree in co-relation 44551. Up to 4683 conditions per place. [2024-06-03 18:41:11,592 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 438 selfloop transitions, 40 changer transitions 0/484 dead transitions. [2024-06-03 18:41:11,592 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 432 places, 484 transitions, 6706 flow [2024-06-03 18:41:11,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 18:41:11,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 18:41:11,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 176 transitions. [2024-06-03 18:41:11,593 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5365853658536586 [2024-06-03 18:41:11,593 INFO L175 Difference]: Start difference. First operand has 425 places, 459 transitions, 5634 flow. Second operand 8 states and 176 transitions. [2024-06-03 18:41:11,593 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 432 places, 484 transitions, 6706 flow [2024-06-03 18:41:16,007 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 427 places, 484 transitions, 6633 flow, removed 3 selfloop flow, removed 5 redundant places. [2024-06-03 18:41:16,012 INFO L231 Difference]: Finished difference. Result has 428 places, 459 transitions, 5645 flow [2024-06-03 18:41:16,012 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5561, PETRI_DIFFERENCE_MINUEND_PLACES=420, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=459, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=419, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5645, PETRI_PLACES=428, PETRI_TRANSITIONS=459} [2024-06-03 18:41:16,013 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 386 predicate places. [2024-06-03 18:41:16,013 INFO L495 AbstractCegarLoop]: Abstraction has has 428 places, 459 transitions, 5645 flow [2024-06-03 18:41:16,013 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:41:16,013 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:41:16,013 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:41:16,013 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable148 [2024-06-03 18:41:16,013 INFO L420 AbstractCegarLoop]: === Iteration 150 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 18:41:16,013 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:41:16,013 INFO L85 PathProgramCache]: Analyzing trace with hash -302740989, now seen corresponding path program 15 times [2024-06-03 18:41:16,013 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:41:16,013 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [538428198] [2024-06-03 18:41:16,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:41:16,013 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:41:16,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:41:16,154 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:41:16,154 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:41:16,154 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [538428198] [2024-06-03 18:41:16,154 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [538428198] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:41:16,154 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:41:16,154 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 18:41:16,154 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2116803817] [2024-06-03 18:41:16,154 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:41:16,154 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 18:41:16,154 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:41:16,155 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 18:41:16,155 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-03 18:41:16,200 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 18:41:16,200 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 428 places, 459 transitions, 5645 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:41:16,200 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:41:16,200 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 18:41:16,200 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:41:17,289 INFO L124 PetriNetUnfolderBase]: 3111/5197 cut-off events. [2024-06-03 18:41:17,289 INFO L125 PetriNetUnfolderBase]: For 912166/912178 co-relation queries the response was YES. [2024-06-03 18:41:17,342 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44017 conditions, 5197 events. 3111/5197 cut-off events. For 912166/912178 co-relation queries the response was YES. Maximal size of possible extension queue 423. Compared 34451 event pairs, 730 based on Foata normal form. 18/5213 useless extension candidates. Maximal degree in co-relation 43821. Up to 4577 conditions per place. [2024-06-03 18:41:17,364 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 415 selfloop transitions, 63 changer transitions 0/484 dead transitions. [2024-06-03 18:41:17,364 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 435 places, 484 transitions, 6725 flow [2024-06-03 18:41:17,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 18:41:17,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 18:41:17,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 181 transitions. [2024-06-03 18:41:17,365 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.551829268292683 [2024-06-03 18:41:17,365 INFO L175 Difference]: Start difference. First operand has 428 places, 459 transitions, 5645 flow. Second operand 8 states and 181 transitions. [2024-06-03 18:41:17,365 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 435 places, 484 transitions, 6725 flow [2024-06-03 18:41:21,588 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 429 places, 484 transitions, 6623 flow, removed 6 selfloop flow, removed 6 redundant places. [2024-06-03 18:41:21,593 INFO L231 Difference]: Finished difference. Result has 430 places, 459 transitions, 5675 flow [2024-06-03 18:41:21,594 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5543, PETRI_DIFFERENCE_MINUEND_PLACES=422, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=459, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=396, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5675, PETRI_PLACES=430, PETRI_TRANSITIONS=459} [2024-06-03 18:41:21,594 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 388 predicate places. [2024-06-03 18:41:21,594 INFO L495 AbstractCegarLoop]: Abstraction has has 430 places, 459 transitions, 5675 flow [2024-06-03 18:41:21,594 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:41:21,594 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:41:21,594 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:41:21,594 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable149 [2024-06-03 18:41:21,594 INFO L420 AbstractCegarLoop]: === Iteration 151 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 18:41:21,595 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:41:21,595 INFO L85 PathProgramCache]: Analyzing trace with hash 727282739, now seen corresponding path program 21 times [2024-06-03 18:41:21,595 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:41:21,595 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1289421400] [2024-06-03 18:41:21,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:41:21,595 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:41:21,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:41:21,734 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:41:21,734 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:41:21,734 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1289421400] [2024-06-03 18:41:21,734 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1289421400] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:41:21,734 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:41:21,734 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 18:41:21,734 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1733563134] [2024-06-03 18:41:21,734 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:41:21,734 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 18:41:21,735 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:41:21,735 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 18:41:21,735 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-03 18:41:21,777 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 18:41:21,777 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 430 places, 459 transitions, 5675 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:41:21,777 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:41:21,777 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 18:41:21,777 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:41:22,927 INFO L124 PetriNetUnfolderBase]: 3139/5243 cut-off events. [2024-06-03 18:41:22,927 INFO L125 PetriNetUnfolderBase]: For 941759/941771 co-relation queries the response was YES. [2024-06-03 18:41:22,975 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44444 conditions, 5243 events. 3139/5243 cut-off events. For 941759/941771 co-relation queries the response was YES. Maximal size of possible extension queue 427. Compared 34874 event pairs, 772 based on Foata normal form. 20/5263 useless extension candidates. Maximal degree in co-relation 44247. Up to 4651 conditions per place. [2024-06-03 18:41:22,994 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 403 selfloop transitions, 81 changer transitions 0/490 dead transitions. [2024-06-03 18:41:22,995 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 439 places, 490 transitions, 6773 flow [2024-06-03 18:41:22,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 18:41:22,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 18:41:22,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 216 transitions. [2024-06-03 18:41:22,995 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.526829268292683 [2024-06-03 18:41:22,995 INFO L175 Difference]: Start difference. First operand has 430 places, 459 transitions, 5675 flow. Second operand 10 states and 216 transitions. [2024-06-03 18:41:22,996 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 439 places, 490 transitions, 6773 flow [2024-06-03 18:41:27,353 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 431 places, 490 transitions, 6598 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-06-03 18:41:27,358 INFO L231 Difference]: Finished difference. Result has 432 places, 460 transitions, 5687 flow [2024-06-03 18:41:27,359 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5500, PETRI_DIFFERENCE_MINUEND_PLACES=422, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=459, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=80, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=378, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5687, PETRI_PLACES=432, PETRI_TRANSITIONS=460} [2024-06-03 18:41:27,359 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 390 predicate places. [2024-06-03 18:41:27,359 INFO L495 AbstractCegarLoop]: Abstraction has has 432 places, 460 transitions, 5687 flow [2024-06-03 18:41:27,359 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:41:27,359 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:41:27,359 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:41:27,359 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable150 [2024-06-03 18:41:27,359 INFO L420 AbstractCegarLoop]: === Iteration 152 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 18:41:27,359 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:41:27,359 INFO L85 PathProgramCache]: Analyzing trace with hash -172646733, now seen corresponding path program 22 times [2024-06-03 18:41:27,359 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:41:27,359 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [56134279] [2024-06-03 18:41:27,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:41:27,360 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:41:27,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:41:27,519 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:41:27,520 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:41:27,520 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [56134279] [2024-06-03 18:41:27,520 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [56134279] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:41:27,520 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:41:27,520 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 18:41:27,520 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [172898468] [2024-06-03 18:41:27,520 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:41:27,520 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 18:41:27,520 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:41:27,520 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 18:41:27,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-03 18:41:27,571 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 18:41:27,571 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 432 places, 460 transitions, 5687 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:41:27,571 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:41:27,571 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 18:41:27,571 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:41:28,788 INFO L124 PetriNetUnfolderBase]: 3121/5221 cut-off events. [2024-06-03 18:41:28,788 INFO L125 PetriNetUnfolderBase]: For 896104/896116 co-relation queries the response was YES. [2024-06-03 18:41:28,831 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43434 conditions, 5221 events. 3121/5221 cut-off events. For 896104/896116 co-relation queries the response was YES. Maximal size of possible extension queue 426. Compared 34714 event pairs, 754 based on Foata normal form. 20/5241 useless extension candidates. Maximal degree in co-relation 43236. Up to 4540 conditions per place. [2024-06-03 18:41:28,849 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 416 selfloop transitions, 68 changer transitions 0/490 dead transitions. [2024-06-03 18:41:28,849 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 438 places, 490 transitions, 6769 flow [2024-06-03 18:41:28,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 18:41:28,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 18:41:28,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 169 transitions. [2024-06-03 18:41:28,850 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5888501742160279 [2024-06-03 18:41:28,850 INFO L175 Difference]: Start difference. First operand has 432 places, 460 transitions, 5687 flow. Second operand 7 states and 169 transitions. [2024-06-03 18:41:28,850 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 438 places, 490 transitions, 6769 flow [2024-06-03 18:41:33,718 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 430 places, 490 transitions, 6600 flow, removed 5 selfloop flow, removed 8 redundant places. [2024-06-03 18:41:33,723 INFO L231 Difference]: Finished difference. Result has 431 places, 460 transitions, 5666 flow [2024-06-03 18:41:33,724 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5518, PETRI_DIFFERENCE_MINUEND_PLACES=424, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=460, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=392, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5666, PETRI_PLACES=431, PETRI_TRANSITIONS=460} [2024-06-03 18:41:33,724 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 389 predicate places. [2024-06-03 18:41:33,724 INFO L495 AbstractCegarLoop]: Abstraction has has 431 places, 460 transitions, 5666 flow [2024-06-03 18:41:33,724 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:41:33,724 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:41:33,724 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:41:33,724 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151 [2024-06-03 18:41:33,724 INFO L420 AbstractCegarLoop]: === Iteration 153 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 18:41:33,724 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:41:33,724 INFO L85 PathProgramCache]: Analyzing trace with hash -177830367, now seen corresponding path program 16 times [2024-06-03 18:41:33,724 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:41:33,724 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1353670119] [2024-06-03 18:41:33,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:41:33,725 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:41:33,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:41:33,868 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:41:33,868 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:41:33,868 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1353670119] [2024-06-03 18:41:33,868 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1353670119] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:41:33,868 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:41:33,868 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 18:41:33,868 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [593727859] [2024-06-03 18:41:33,868 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:41:33,868 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 18:41:33,868 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:41:33,869 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 18:41:33,869 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-03 18:41:33,911 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 18:41:33,911 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 431 places, 460 transitions, 5666 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:41:33,911 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:41:33,911 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 18:41:33,912 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:41:34,994 INFO L124 PetriNetUnfolderBase]: 3149/5265 cut-off events. [2024-06-03 18:41:34,994 INFO L125 PetriNetUnfolderBase]: For 911191/911203 co-relation queries the response was YES. [2024-06-03 18:41:35,051 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43885 conditions, 5265 events. 3149/5265 cut-off events. For 911191/911203 co-relation queries the response was YES. Maximal size of possible extension queue 430. Compared 35061 event pairs, 746 based on Foata normal form. 20/5285 useless extension candidates. Maximal degree in co-relation 43686. Up to 4635 conditions per place. [2024-06-03 18:41:35,073 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 415 selfloop transitions, 61 changer transitions 0/482 dead transitions. [2024-06-03 18:41:35,073 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 437 places, 482 transitions, 6743 flow [2024-06-03 18:41:35,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 18:41:35,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 18:41:35,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 160 transitions. [2024-06-03 18:41:35,074 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5574912891986062 [2024-06-03 18:41:35,074 INFO L175 Difference]: Start difference. First operand has 431 places, 460 transitions, 5666 flow. Second operand 7 states and 160 transitions. [2024-06-03 18:41:35,074 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 437 places, 482 transitions, 6743 flow [2024-06-03 18:41:39,960 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 430 places, 482 transitions, 6590 flow, removed 3 selfloop flow, removed 7 redundant places. [2024-06-03 18:41:39,964 INFO L231 Difference]: Finished difference. Result has 431 places, 461 transitions, 5682 flow [2024-06-03 18:41:39,965 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5513, PETRI_DIFFERENCE_MINUEND_PLACES=424, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=460, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=399, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5682, PETRI_PLACES=431, PETRI_TRANSITIONS=461} [2024-06-03 18:41:39,965 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 389 predicate places. [2024-06-03 18:41:39,965 INFO L495 AbstractCegarLoop]: Abstraction has has 431 places, 461 transitions, 5682 flow [2024-06-03 18:41:39,965 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:41:39,965 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:41:39,965 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:41:39,965 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152 [2024-06-03 18:41:39,965 INFO L420 AbstractCegarLoop]: === Iteration 154 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 18:41:39,965 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:41:39,966 INFO L85 PathProgramCache]: Analyzing trace with hash -167105607, now seen corresponding path program 17 times [2024-06-03 18:41:39,966 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:41:39,966 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [401467503] [2024-06-03 18:41:39,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:41:39,966 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:41:39,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:41:40,108 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:41:40,108 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:41:40,108 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [401467503] [2024-06-03 18:41:40,108 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [401467503] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:41:40,108 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:41:40,108 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 18:41:40,108 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1693156661] [2024-06-03 18:41:40,108 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:41:40,108 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 18:41:40,109 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:41:40,109 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 18:41:40,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-03 18:41:40,150 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 18:41:40,151 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 431 places, 461 transitions, 5682 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:41:40,151 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:41:40,151 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 18:41:40,151 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:41:41,246 INFO L124 PetriNetUnfolderBase]: 3164/5290 cut-off events. [2024-06-03 18:41:41,246 INFO L125 PetriNetUnfolderBase]: For 896389/896401 co-relation queries the response was YES. [2024-06-03 18:41:41,301 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43874 conditions, 5290 events. 3164/5290 cut-off events. For 896389/896401 co-relation queries the response was YES. Maximal size of possible extension queue 433. Compared 35250 event pairs, 761 based on Foata normal form. 20/5310 useless extension candidates. Maximal degree in co-relation 43675. Up to 4724 conditions per place. [2024-06-03 18:41:41,323 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 419 selfloop transitions, 59 changer transitions 0/484 dead transitions. [2024-06-03 18:41:41,323 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 438 places, 484 transitions, 6767 flow [2024-06-03 18:41:41,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 18:41:41,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 18:41:41,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 177 transitions. [2024-06-03 18:41:41,324 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5396341463414634 [2024-06-03 18:41:41,324 INFO L175 Difference]: Start difference. First operand has 431 places, 461 transitions, 5682 flow. Second operand 8 states and 177 transitions. [2024-06-03 18:41:41,324 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 438 places, 484 transitions, 6767 flow [2024-06-03 18:41:45,639 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 431 places, 484 transitions, 6629 flow, removed 8 selfloop flow, removed 7 redundant places. [2024-06-03 18:41:45,658 INFO L231 Difference]: Finished difference. Result has 432 places, 462 transitions, 5705 flow [2024-06-03 18:41:45,659 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5544, PETRI_DIFFERENCE_MINUEND_PLACES=424, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=461, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=402, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5705, PETRI_PLACES=432, PETRI_TRANSITIONS=462} [2024-06-03 18:41:45,659 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 390 predicate places. [2024-06-03 18:41:45,659 INFO L495 AbstractCegarLoop]: Abstraction has has 432 places, 462 transitions, 5705 flow [2024-06-03 18:41:45,659 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:41:45,659 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:41:45,659 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:41:45,660 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable153 [2024-06-03 18:41:45,660 INFO L420 AbstractCegarLoop]: === Iteration 155 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 18:41:45,660 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:41:45,660 INFO L85 PathProgramCache]: Analyzing trace with hash -178009113, now seen corresponding path program 23 times [2024-06-03 18:41:45,660 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:41:45,660 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [206944899] [2024-06-03 18:41:45,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:41:45,660 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:41:45,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:41:45,809 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:41:45,809 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:41:45,809 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [206944899] [2024-06-03 18:41:45,809 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [206944899] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:41:45,809 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:41:45,809 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 18:41:45,809 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1723113109] [2024-06-03 18:41:45,809 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:41:45,809 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 18:41:45,809 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:41:45,809 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 18:41:45,809 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-03 18:41:45,861 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 18:41:45,861 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 432 places, 462 transitions, 5705 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:41:45,861 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:41:45,861 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 18:41:45,861 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:41:46,942 INFO L124 PetriNetUnfolderBase]: 3146/5264 cut-off events. [2024-06-03 18:41:46,942 INFO L125 PetriNetUnfolderBase]: For 822241/822253 co-relation queries the response was YES. [2024-06-03 18:41:46,996 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42503 conditions, 5264 events. 3146/5264 cut-off events. For 822241/822253 co-relation queries the response was YES. Maximal size of possible extension queue 433. Compared 35136 event pairs, 753 based on Foata normal form. 20/5284 useless extension candidates. Maximal degree in co-relation 42305. Up to 4565 conditions per place. [2024-06-03 18:41:47,017 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 421 selfloop transitions, 69 changer transitions 0/496 dead transitions. [2024-06-03 18:41:47,017 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 439 places, 496 transitions, 6809 flow [2024-06-03 18:41:47,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 18:41:47,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 18:41:47,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 189 transitions. [2024-06-03 18:41:47,018 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5762195121951219 [2024-06-03 18:41:47,018 INFO L175 Difference]: Start difference. First operand has 432 places, 462 transitions, 5705 flow. Second operand 8 states and 189 transitions. [2024-06-03 18:41:47,018 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 439 places, 496 transitions, 6809 flow [2024-06-03 18:41:50,913 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 432 places, 496 transitions, 6672 flow, removed 11 selfloop flow, removed 7 redundant places. [2024-06-03 18:41:50,918 INFO L231 Difference]: Finished difference. Result has 433 places, 462 transitions, 5717 flow [2024-06-03 18:41:50,918 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5568, PETRI_DIFFERENCE_MINUEND_PLACES=425, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=462, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=393, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5717, PETRI_PLACES=433, PETRI_TRANSITIONS=462} [2024-06-03 18:41:50,918 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 391 predicate places. [2024-06-03 18:41:50,918 INFO L495 AbstractCegarLoop]: Abstraction has has 433 places, 462 transitions, 5717 flow [2024-06-03 18:41:50,919 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:41:50,919 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:41:50,919 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:41:50,919 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable154 [2024-06-03 18:41:50,919 INFO L420 AbstractCegarLoop]: === Iteration 156 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 18:41:50,919 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:41:50,919 INFO L85 PathProgramCache]: Analyzing trace with hash -178156797, now seen corresponding path program 18 times [2024-06-03 18:41:50,919 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:41:50,919 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [872088977] [2024-06-03 18:41:50,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:41:50,920 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:41:50,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:41:51,063 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:41:51,063 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:41:51,063 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [872088977] [2024-06-03 18:41:51,063 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [872088977] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:41:51,063 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:41:51,063 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 18:41:51,063 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1434408726] [2024-06-03 18:41:51,063 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:41:51,063 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 18:41:51,063 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:41:51,063 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 18:41:51,064 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-03 18:41:51,113 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 18:41:51,114 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 433 places, 462 transitions, 5717 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:41:51,114 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:41:51,114 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 18:41:51,114 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:41:52,163 INFO L124 PetriNetUnfolderBase]: 3133/5245 cut-off events. [2024-06-03 18:41:52,168 INFO L125 PetriNetUnfolderBase]: For 762076/762088 co-relation queries the response was YES. [2024-06-03 18:41:52,221 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41562 conditions, 5245 events. 3133/5245 cut-off events. For 762076/762088 co-relation queries the response was YES. Maximal size of possible extension queue 433. Compared 34959 event pairs, 515 based on Foata normal form. 18/5263 useless extension candidates. Maximal degree in co-relation 41364. Up to 4319 conditions per place. [2024-06-03 18:41:52,243 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 404 selfloop transitions, 79 changer transitions 0/489 dead transitions. [2024-06-03 18:41:52,243 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 439 places, 489 transitions, 6813 flow [2024-06-03 18:41:52,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 18:41:52,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 18:41:52,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 166 transitions. [2024-06-03 18:41:52,244 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.578397212543554 [2024-06-03 18:41:52,244 INFO L175 Difference]: Start difference. First operand has 433 places, 462 transitions, 5717 flow. Second operand 7 states and 166 transitions. [2024-06-03 18:41:52,244 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 439 places, 489 transitions, 6813 flow [2024-06-03 18:41:56,665 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 430 places, 489 transitions, 6652 flow, removed 7 selfloop flow, removed 9 redundant places. [2024-06-03 18:41:56,670 INFO L231 Difference]: Finished difference. Result has 431 places, 462 transitions, 5728 flow [2024-06-03 18:41:56,670 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5556, PETRI_DIFFERENCE_MINUEND_PLACES=424, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=462, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=79, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=383, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5728, PETRI_PLACES=431, PETRI_TRANSITIONS=462} [2024-06-03 18:41:56,670 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 389 predicate places. [2024-06-03 18:41:56,670 INFO L495 AbstractCegarLoop]: Abstraction has has 431 places, 462 transitions, 5728 flow [2024-06-03 18:41:56,671 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:41:56,671 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:41:56,671 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:41:56,671 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable155 [2024-06-03 18:41:56,671 INFO L420 AbstractCegarLoop]: === Iteration 157 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 18:41:56,671 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:41:56,671 INFO L85 PathProgramCache]: Analyzing trace with hash -178156983, now seen corresponding path program 24 times [2024-06-03 18:41:56,671 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:41:56,671 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2114821561] [2024-06-03 18:41:56,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:41:56,672 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:41:56,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:41:56,817 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:41:56,818 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:41:56,818 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2114821561] [2024-06-03 18:41:56,818 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2114821561] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:41:56,818 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:41:56,818 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 18:41:56,818 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2115022894] [2024-06-03 18:41:56,818 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:41:56,818 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 18:41:56,818 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:41:56,818 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 18:41:56,818 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-03 18:41:56,867 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 18:41:56,867 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 431 places, 462 transitions, 5728 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:41:56,868 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:41:56,868 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 18:41:56,868 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:41:58,006 INFO L124 PetriNetUnfolderBase]: 3120/5230 cut-off events. [2024-06-03 18:41:58,006 INFO L125 PetriNetUnfolderBase]: For 707523/707535 co-relation queries the response was YES. [2024-06-03 18:41:58,053 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40746 conditions, 5230 events. 3120/5230 cut-off events. For 707523/707535 co-relation queries the response was YES. Maximal size of possible extension queue 434. Compared 34971 event pairs, 512 based on Foata normal form. 18/5248 useless extension candidates. Maximal degree in co-relation 40549. Up to 4200 conditions per place. [2024-06-03 18:41:58,072 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 407 selfloop transitions, 86 changer transitions 0/499 dead transitions. [2024-06-03 18:41:58,073 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 438 places, 499 transitions, 6862 flow [2024-06-03 18:41:58,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 18:41:58,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 18:41:58,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 192 transitions. [2024-06-03 18:41:58,073 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5853658536585366 [2024-06-03 18:41:58,073 INFO L175 Difference]: Start difference. First operand has 431 places, 462 transitions, 5728 flow. Second operand 8 states and 192 transitions. [2024-06-03 18:41:58,073 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 438 places, 499 transitions, 6862 flow [2024-06-03 18:42:01,977 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 430 places, 499 transitions, 6680 flow, removed 11 selfloop flow, removed 8 redundant places. [2024-06-03 18:42:01,982 INFO L231 Difference]: Finished difference. Result has 431 places, 462 transitions, 5726 flow [2024-06-03 18:42:01,983 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5546, PETRI_DIFFERENCE_MINUEND_PLACES=423, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=462, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=86, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=376, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5726, PETRI_PLACES=431, PETRI_TRANSITIONS=462} [2024-06-03 18:42:01,983 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 389 predicate places. [2024-06-03 18:42:01,983 INFO L495 AbstractCegarLoop]: Abstraction has has 431 places, 462 transitions, 5726 flow [2024-06-03 18:42:01,983 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:42:01,983 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:42:01,983 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:42:01,984 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable156 [2024-06-03 18:42:01,984 INFO L420 AbstractCegarLoop]: === Iteration 158 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 18:42:01,984 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:42:01,984 INFO L85 PathProgramCache]: Analyzing trace with hash -1862053239, now seen corresponding path program 25 times [2024-06-03 18:42:01,984 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:42:01,984 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [687178908] [2024-06-03 18:42:01,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:42:01,984 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:42:01,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:42:02,116 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:42:02,116 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:42:02,117 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [687178908] [2024-06-03 18:42:02,117 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [687178908] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:42:02,117 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:42:02,117 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 18:42:02,117 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [719343403] [2024-06-03 18:42:02,117 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:42:02,117 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 18:42:02,117 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:42:02,118 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 18:42:02,118 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-03 18:42:02,172 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 18:42:02,172 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 431 places, 462 transitions, 5726 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:42:02,172 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:42:02,172 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 18:42:02,172 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:42:03,203 INFO L124 PetriNetUnfolderBase]: 3102/5200 cut-off events. [2024-06-03 18:42:03,203 INFO L125 PetriNetUnfolderBase]: For 643568/643580 co-relation queries the response was YES. [2024-06-03 18:42:03,253 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39327 conditions, 5200 events. 3102/5200 cut-off events. For 643568/643580 co-relation queries the response was YES. Maximal size of possible extension queue 434. Compared 34753 event pairs, 729 based on Foata normal form. 20/5220 useless extension candidates. Maximal degree in co-relation 39132. Up to 4433 conditions per place. [2024-06-03 18:42:03,273 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 401 selfloop transitions, 93 changer transitions 0/500 dead transitions. [2024-06-03 18:42:03,273 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 439 places, 500 transitions, 6848 flow [2024-06-03 18:42:03,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 18:42:03,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 18:42:03,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 210 transitions. [2024-06-03 18:42:03,274 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5691056910569106 [2024-06-03 18:42:03,274 INFO L175 Difference]: Start difference. First operand has 431 places, 462 transitions, 5726 flow. Second operand 9 states and 210 transitions. [2024-06-03 18:42:03,274 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 439 places, 500 transitions, 6848 flow [2024-06-03 18:42:06,788 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 430 places, 500 transitions, 6660 flow, removed 5 selfloop flow, removed 9 redundant places. [2024-06-03 18:42:06,793 INFO L231 Difference]: Finished difference. Result has 431 places, 462 transitions, 5738 flow [2024-06-03 18:42:06,793 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5538, PETRI_DIFFERENCE_MINUEND_PLACES=422, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=462, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=93, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=369, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5738, PETRI_PLACES=431, PETRI_TRANSITIONS=462} [2024-06-03 18:42:06,793 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 389 predicate places. [2024-06-03 18:42:06,793 INFO L495 AbstractCegarLoop]: Abstraction has has 431 places, 462 transitions, 5738 flow [2024-06-03 18:42:06,794 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:42:06,794 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:42:06,794 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:42:06,794 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable157 [2024-06-03 18:42:06,794 INFO L420 AbstractCegarLoop]: === Iteration 159 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 18:42:06,794 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:42:06,794 INFO L85 PathProgramCache]: Analyzing trace with hash -1636830303, now seen corresponding path program 19 times [2024-06-03 18:42:06,794 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:42:06,794 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [132715285] [2024-06-03 18:42:06,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:42:06,794 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:42:06,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:42:06,927 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:42:06,927 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:42:06,927 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [132715285] [2024-06-03 18:42:06,927 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [132715285] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:42:06,927 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:42:06,928 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 18:42:06,928 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1838198072] [2024-06-03 18:42:06,928 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:42:06,928 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 18:42:06,928 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:42:06,928 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 18:42:06,928 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-03 18:42:06,970 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 18:42:06,970 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 431 places, 462 transitions, 5738 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:42:06,970 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:42:06,970 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 18:42:06,970 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:42:07,971 INFO L124 PetriNetUnfolderBase]: 3176/5318 cut-off events. [2024-06-03 18:42:07,972 INFO L125 PetriNetUnfolderBase]: For 690374/690386 co-relation queries the response was YES. [2024-06-03 18:42:08,022 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41192 conditions, 5318 events. 3176/5318 cut-off events. For 690374/690386 co-relation queries the response was YES. Maximal size of possible extension queue 443. Compared 35529 event pairs, 741 based on Foata normal form. 20/5338 useless extension candidates. Maximal degree in co-relation 40998. Up to 4410 conditions per place. [2024-06-03 18:42:08,041 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 396 selfloop transitions, 90 changer transitions 0/492 dead transitions. [2024-06-03 18:42:08,041 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 439 places, 492 transitions, 7164 flow [2024-06-03 18:42:08,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 18:42:08,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 18:42:08,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 197 transitions. [2024-06-03 18:42:08,042 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5338753387533876 [2024-06-03 18:42:08,042 INFO L175 Difference]: Start difference. First operand has 431 places, 462 transitions, 5738 flow. Second operand 9 states and 197 transitions. [2024-06-03 18:42:08,042 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 439 places, 492 transitions, 7164 flow [2024-06-03 18:42:11,830 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 430 places, 492 transitions, 6958 flow, removed 7 selfloop flow, removed 9 redundant places. [2024-06-03 18:42:11,835 INFO L231 Difference]: Finished difference. Result has 432 places, 464 transitions, 5820 flow [2024-06-03 18:42:11,835 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5538, PETRI_DIFFERENCE_MINUEND_PLACES=422, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=462, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=372, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5820, PETRI_PLACES=432, PETRI_TRANSITIONS=464} [2024-06-03 18:42:11,835 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 390 predicate places. [2024-06-03 18:42:11,836 INFO L495 AbstractCegarLoop]: Abstraction has has 432 places, 464 transitions, 5820 flow [2024-06-03 18:42:11,836 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:42:11,836 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:42:11,836 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:42:11,836 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable158 [2024-06-03 18:42:11,836 INFO L420 AbstractCegarLoop]: === Iteration 160 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 18:42:11,836 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:42:11,836 INFO L85 PathProgramCache]: Analyzing trace with hash -1633973343, now seen corresponding path program 20 times [2024-06-03 18:42:11,836 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:42:11,836 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [721375989] [2024-06-03 18:42:11,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:42:11,836 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:42:11,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:42:11,979 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:42:11,979 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:42:11,980 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [721375989] [2024-06-03 18:42:11,980 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [721375989] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:42:11,980 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:42:11,980 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 18:42:11,980 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1463858331] [2024-06-03 18:42:11,980 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:42:11,980 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 18:42:11,980 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:42:11,980 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 18:42:11,980 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2024-06-03 18:42:12,025 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 18:42:12,025 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 432 places, 464 transitions, 5820 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:42:12,025 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:42:12,025 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 18:42:12,025 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:42:13,056 INFO L124 PetriNetUnfolderBase]: 3204/5362 cut-off events. [2024-06-03 18:42:13,056 INFO L125 PetriNetUnfolderBase]: For 673938/673950 co-relation queries the response was YES. [2024-06-03 18:42:13,110 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41713 conditions, 5362 events. 3204/5362 cut-off events. For 673938/673950 co-relation queries the response was YES. Maximal size of possible extension queue 446. Compared 35964 event pairs, 777 based on Foata normal form. 20/5382 useless extension candidates. Maximal degree in co-relation 41518. Up to 4756 conditions per place. [2024-06-03 18:42:13,132 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 398 selfloop transitions, 84 changer transitions 0/488 dead transitions. [2024-06-03 18:42:13,132 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 440 places, 488 transitions, 6920 flow [2024-06-03 18:42:13,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 18:42:13,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 18:42:13,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 193 transitions. [2024-06-03 18:42:13,132 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5230352303523035 [2024-06-03 18:42:13,132 INFO L175 Difference]: Start difference. First operand has 432 places, 464 transitions, 5820 flow. Second operand 9 states and 193 transitions. [2024-06-03 18:42:13,133 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 440 places, 488 transitions, 6920 flow [2024-06-03 18:42:16,509 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 434 places, 488 transitions, 6745 flow, removed 12 selfloop flow, removed 6 redundant places. [2024-06-03 18:42:16,514 INFO L231 Difference]: Finished difference. Result has 435 places, 465 transitions, 5861 flow [2024-06-03 18:42:16,514 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5650, PETRI_DIFFERENCE_MINUEND_PLACES=426, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=464, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=83, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=380, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5861, PETRI_PLACES=435, PETRI_TRANSITIONS=465} [2024-06-03 18:42:16,514 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 393 predicate places. [2024-06-03 18:42:16,514 INFO L495 AbstractCegarLoop]: Abstraction has has 435 places, 465 transitions, 5861 flow [2024-06-03 18:42:16,514 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:42:16,514 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:42:16,514 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:42:16,514 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable159 [2024-06-03 18:42:16,514 INFO L420 AbstractCegarLoop]: === Iteration 161 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 18:42:16,515 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:42:16,515 INFO L85 PathProgramCache]: Analyzing trace with hash -1861874493, now seen corresponding path program 21 times [2024-06-03 18:42:16,515 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:42:16,515 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [870246667] [2024-06-03 18:42:16,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:42:16,515 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:42:16,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:42:16,656 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:42:16,657 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:42:16,657 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [870246667] [2024-06-03 18:42:16,657 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [870246667] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:42:16,657 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:42:16,657 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 18:42:16,657 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [514330404] [2024-06-03 18:42:16,657 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:42:16,657 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 18:42:16,657 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:42:16,658 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 18:42:16,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2024-06-03 18:42:16,708 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 18:42:16,708 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 435 places, 465 transitions, 5861 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:42:16,708 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:42:16,708 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 18:42:16,708 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:42:17,827 INFO L124 PetriNetUnfolderBase]: 3186/5336 cut-off events. [2024-06-03 18:42:17,827 INFO L125 PetriNetUnfolderBase]: For 617958/617970 co-relation queries the response was YES. [2024-06-03 18:42:17,873 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40330 conditions, 5336 events. 3186/5336 cut-off events. For 617958/617970 co-relation queries the response was YES. Maximal size of possible extension queue 447. Compared 35763 event pairs, 769 based on Foata normal form. 20/5356 useless extension candidates. Maximal degree in co-relation 40134. Up to 4698 conditions per place. [2024-06-03 18:42:17,892 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 397 selfloop transitions, 89 changer transitions 0/492 dead transitions. [2024-06-03 18:42:17,892 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 444 places, 492 transitions, 6941 flow [2024-06-03 18:42:17,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 18:42:17,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 18:42:17,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 213 transitions. [2024-06-03 18:42:17,893 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5195121951219512 [2024-06-03 18:42:17,893 INFO L175 Difference]: Start difference. First operand has 435 places, 465 transitions, 5861 flow. Second operand 10 states and 213 transitions. [2024-06-03 18:42:17,893 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 444 places, 492 transitions, 6941 flow [2024-06-03 18:42:21,032 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 435 places, 492 transitions, 6748 flow, removed 13 selfloop flow, removed 9 redundant places. [2024-06-03 18:42:21,037 INFO L231 Difference]: Finished difference. Result has 436 places, 465 transitions, 5857 flow [2024-06-03 18:42:21,038 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5668, PETRI_DIFFERENCE_MINUEND_PLACES=426, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=465, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=89, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=376, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5857, PETRI_PLACES=436, PETRI_TRANSITIONS=465} [2024-06-03 18:42:21,038 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 394 predicate places. [2024-06-03 18:42:21,038 INFO L495 AbstractCegarLoop]: Abstraction has has 436 places, 465 transitions, 5857 flow [2024-06-03 18:42:21,038 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:42:21,038 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:42:21,038 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:42:21,038 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable160 [2024-06-03 18:42:21,038 INFO L420 AbstractCegarLoop]: === Iteration 162 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 18:42:21,038 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:42:21,039 INFO L85 PathProgramCache]: Analyzing trace with hash 1792546063, now seen corresponding path program 26 times [2024-06-03 18:42:21,039 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:42:21,039 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1975258786] [2024-06-03 18:42:21,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:42:21,039 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:42:21,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:42:21,176 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:42:21,176 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:42:21,176 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1975258786] [2024-06-03 18:42:21,176 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1975258786] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:42:21,176 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:42:21,176 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 18:42:21,176 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1114938080] [2024-06-03 18:42:21,176 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:42:21,176 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 18:42:21,176 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:42:21,176 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 18:42:21,176 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-03 18:42:21,223 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 18:42:21,223 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 436 places, 465 transitions, 5857 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:42:21,223 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:42:21,223 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 18:42:21,223 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:42:22,345 INFO L124 PetriNetUnfolderBase]: 3173/5309 cut-off events. [2024-06-03 18:42:22,345 INFO L125 PetriNetUnfolderBase]: For 564358/564370 co-relation queries the response was YES. [2024-06-03 18:42:22,399 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39374 conditions, 5309 events. 3173/5309 cut-off events. For 564358/564370 co-relation queries the response was YES. Maximal size of possible extension queue 446. Compared 35653 event pairs, 697 based on Foata normal form. 18/5323 useless extension candidates. Maximal degree in co-relation 39179. Up to 4369 conditions per place. [2024-06-03 18:42:22,421 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 399 selfloop transitions, 105 changer transitions 0/510 dead transitions. [2024-06-03 18:42:22,421 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 445 places, 510 transitions, 7033 flow [2024-06-03 18:42:22,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 18:42:22,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 18:42:22,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 233 transitions. [2024-06-03 18:42:22,422 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5682926829268292 [2024-06-03 18:42:22,422 INFO L175 Difference]: Start difference. First operand has 436 places, 465 transitions, 5857 flow. Second operand 10 states and 233 transitions. [2024-06-03 18:42:22,422 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 445 places, 510 transitions, 7033 flow [2024-06-03 18:42:25,361 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 435 places, 510 transitions, 6824 flow, removed 5 selfloop flow, removed 10 redundant places. [2024-06-03 18:42:25,366 INFO L231 Difference]: Finished difference. Result has 436 places, 465 transitions, 5868 flow [2024-06-03 18:42:25,366 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5648, PETRI_DIFFERENCE_MINUEND_PLACES=426, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=465, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=105, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=360, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5868, PETRI_PLACES=436, PETRI_TRANSITIONS=465} [2024-06-03 18:42:25,367 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 394 predicate places. [2024-06-03 18:42:25,367 INFO L495 AbstractCegarLoop]: Abstraction has has 436 places, 465 transitions, 5868 flow [2024-06-03 18:42:25,367 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:42:25,367 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:42:25,367 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:42:25,367 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable161 [2024-06-03 18:42:25,367 INFO L420 AbstractCegarLoop]: === Iteration 163 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 18:42:25,368 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:42:25,368 INFO L85 PathProgramCache]: Analyzing trace with hash 82586425, now seen corresponding path program 22 times [2024-06-03 18:42:25,368 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:42:25,368 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1637043148] [2024-06-03 18:42:25,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:42:25,368 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:42:25,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:42:25,508 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:42:25,508 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:42:25,508 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1637043148] [2024-06-03 18:42:25,508 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1637043148] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:42:25,508 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:42:25,508 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 18:42:25,508 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2064303581] [2024-06-03 18:42:25,508 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:42:25,508 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 18:42:25,508 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:42:25,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 18:42:25,509 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2024-06-03 18:42:25,561 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 18:42:25,562 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 436 places, 465 transitions, 5868 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:42:25,562 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:42:25,562 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 18:42:25,562 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:42:26,607 INFO L124 PetriNetUnfolderBase]: 3188/5340 cut-off events. [2024-06-03 18:42:26,607 INFO L125 PetriNetUnfolderBase]: For 563705/563709 co-relation queries the response was YES. [2024-06-03 18:42:26,662 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39483 conditions, 5340 events. 3188/5340 cut-off events. For 563705/563709 co-relation queries the response was YES. Maximal size of possible extension queue 448. Compared 35838 event pairs, 787 based on Foata normal form. 12/5351 useless extension candidates. Maximal degree in co-relation 39288. Up to 4768 conditions per place. [2024-06-03 18:42:26,683 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 397 selfloop transitions, 78 changer transitions 0/481 dead transitions. [2024-06-03 18:42:26,683 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 442 places, 481 transitions, 6931 flow [2024-06-03 18:42:26,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 18:42:26,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 18:42:26,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 152 transitions. [2024-06-03 18:42:26,684 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5296167247386759 [2024-06-03 18:42:26,684 INFO L175 Difference]: Start difference. First operand has 436 places, 465 transitions, 5868 flow. Second operand 7 states and 152 transitions. [2024-06-03 18:42:26,684 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 442 places, 481 transitions, 6931 flow [2024-06-03 18:42:29,515 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 431 places, 481 transitions, 6703 flow, removed 4 selfloop flow, removed 11 redundant places. [2024-06-03 18:42:29,521 INFO L231 Difference]: Finished difference. Result has 432 places, 466 transitions, 5838 flow [2024-06-03 18:42:29,521 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5640, PETRI_DIFFERENCE_MINUEND_PLACES=425, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=465, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=77, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=387, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5838, PETRI_PLACES=432, PETRI_TRANSITIONS=466} [2024-06-03 18:42:29,521 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 390 predicate places. [2024-06-03 18:42:29,521 INFO L495 AbstractCegarLoop]: Abstraction has has 432 places, 466 transitions, 5838 flow [2024-06-03 18:42:29,521 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:42:29,521 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:42:29,521 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:42:29,521 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable162 [2024-06-03 18:42:29,521 INFO L420 AbstractCegarLoop]: === Iteration 164 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 18:42:29,522 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:42:29,522 INFO L85 PathProgramCache]: Analyzing trace with hash -1948892733, now seen corresponding path program 23 times [2024-06-03 18:42:29,522 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:42:29,522 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [32814297] [2024-06-03 18:42:29,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:42:29,522 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:42:29,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:42:29,656 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:42:29,656 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:42:29,656 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [32814297] [2024-06-03 18:42:29,656 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [32814297] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:42:29,656 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:42:29,657 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 18:42:29,657 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1510502278] [2024-06-03 18:42:29,657 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:42:29,657 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 18:42:29,657 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:42:29,657 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 18:42:29,657 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-03 18:42:29,733 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 18:42:29,733 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 432 places, 466 transitions, 5838 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:42:29,733 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:42:29,734 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 18:42:29,734 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:42:30,805 INFO L124 PetriNetUnfolderBase]: 3175/5310 cut-off events. [2024-06-03 18:42:30,805 INFO L125 PetriNetUnfolderBase]: For 493897/493909 co-relation queries the response was YES. [2024-06-03 18:42:30,859 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38250 conditions, 5310 events. 3175/5310 cut-off events. For 493897/493909 co-relation queries the response was YES. Maximal size of possible extension queue 449. Compared 35548 event pairs, 721 based on Foata normal form. 18/5315 useless extension candidates. Maximal degree in co-relation 38056. Up to 4449 conditions per place. [2024-06-03 18:42:30,879 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 388 selfloop transitions, 105 changer transitions 0/499 dead transitions. [2024-06-03 18:42:30,879 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 441 places, 499 transitions, 6968 flow [2024-06-03 18:42:30,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 18:42:30,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 18:42:30,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 219 transitions. [2024-06-03 18:42:30,880 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5341463414634147 [2024-06-03 18:42:30,880 INFO L175 Difference]: Start difference. First operand has 432 places, 466 transitions, 5838 flow. Second operand 10 states and 219 transitions. [2024-06-03 18:42:30,880 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 441 places, 499 transitions, 6968 flow [2024-06-03 18:42:33,824 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 436 places, 499 transitions, 6789 flow, removed 13 selfloop flow, removed 5 redundant places. [2024-06-03 18:42:33,829 INFO L231 Difference]: Finished difference. Result has 437 places, 466 transitions, 5879 flow [2024-06-03 18:42:33,829 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5659, PETRI_DIFFERENCE_MINUEND_PLACES=427, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=466, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=105, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=361, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5879, PETRI_PLACES=437, PETRI_TRANSITIONS=466} [2024-06-03 18:42:33,829 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 395 predicate places. [2024-06-03 18:42:33,829 INFO L495 AbstractCegarLoop]: Abstraction has has 437 places, 466 transitions, 5879 flow [2024-06-03 18:42:33,830 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:42:33,830 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:42:33,830 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:42:33,830 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable163 [2024-06-03 18:42:33,830 INFO L420 AbstractCegarLoop]: === Iteration 165 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 18:42:33,830 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:42:33,830 INFO L85 PathProgramCache]: Analyzing trace with hash 79729465, now seen corresponding path program 24 times [2024-06-03 18:42:33,830 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:42:33,831 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [538348022] [2024-06-03 18:42:33,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:42:33,831 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:42:33,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:42:33,963 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:42:33,963 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:42:33,964 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [538348022] [2024-06-03 18:42:33,964 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [538348022] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:42:33,964 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:42:33,964 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 18:42:33,964 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1172071937] [2024-06-03 18:42:33,964 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:42:33,964 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 18:42:33,964 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:42:33,964 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 18:42:33,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-03 18:42:34,007 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 18:42:34,007 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 437 places, 466 transitions, 5879 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:42:34,007 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:42:34,007 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 18:42:34,007 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:42:35,152 INFO L124 PetriNetUnfolderBase]: 3190/5346 cut-off events. [2024-06-03 18:42:35,152 INFO L125 PetriNetUnfolderBase]: For 502829/502833 co-relation queries the response was YES. [2024-06-03 18:42:35,195 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38366 conditions, 5346 events. 3190/5346 cut-off events. For 502829/502833 co-relation queries the response was YES. Maximal size of possible extension queue 453. Compared 35922 event pairs, 777 based on Foata normal form. 12/5357 useless extension candidates. Maximal degree in co-relation 38171. Up to 4666 conditions per place. [2024-06-03 18:42:35,214 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 400 selfloop transitions, 80 changer transitions 0/486 dead transitions. [2024-06-03 18:42:35,214 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 443 places, 486 transitions, 7000 flow [2024-06-03 18:42:35,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 18:42:35,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 18:42:35,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 155 transitions. [2024-06-03 18:42:35,215 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5400696864111498 [2024-06-03 18:42:35,215 INFO L175 Difference]: Start difference. First operand has 437 places, 466 transitions, 5879 flow. Second operand 7 states and 155 transitions. [2024-06-03 18:42:35,215 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 443 places, 486 transitions, 7000 flow [2024-06-03 18:42:37,842 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 432 places, 486 transitions, 6751 flow, removed 8 selfloop flow, removed 11 redundant places. [2024-06-03 18:42:37,847 INFO L231 Difference]: Finished difference. Result has 433 places, 467 transitions, 5827 flow [2024-06-03 18:42:37,847 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5630, PETRI_DIFFERENCE_MINUEND_PLACES=426, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=466, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=79, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=386, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5827, PETRI_PLACES=433, PETRI_TRANSITIONS=467} [2024-06-03 18:42:37,847 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 391 predicate places. [2024-06-03 18:42:37,847 INFO L495 AbstractCegarLoop]: Abstraction has has 433 places, 467 transitions, 5827 flow [2024-06-03 18:42:37,848 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:42:37,848 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:42:37,848 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:42:37,848 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable164 [2024-06-03 18:42:37,848 INFO L420 AbstractCegarLoop]: === Iteration 166 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 18:42:37,848 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:42:37,848 INFO L85 PathProgramCache]: Analyzing trace with hash -1950529533, now seen corresponding path program 25 times [2024-06-03 18:42:37,848 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:42:37,848 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [188086382] [2024-06-03 18:42:37,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:42:37,848 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:42:37,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:42:37,981 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:42:37,981 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:42:37,981 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [188086382] [2024-06-03 18:42:37,981 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [188086382] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:42:37,981 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:42:37,981 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 18:42:37,981 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [608941805] [2024-06-03 18:42:37,982 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:42:37,982 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 18:42:37,982 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:42:37,982 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 18:42:37,982 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-03 18:42:38,051 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 18:42:38,051 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 433 places, 467 transitions, 5827 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:42:38,051 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:42:38,051 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 18:42:38,051 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:42:39,133 INFO L124 PetriNetUnfolderBase]: 3210/5384 cut-off events. [2024-06-03 18:42:39,133 INFO L125 PetriNetUnfolderBase]: For 473654/473666 co-relation queries the response was YES. [2024-06-03 18:42:39,189 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38206 conditions, 5384 events. 3210/5384 cut-off events. For 473654/473666 co-relation queries the response was YES. Maximal size of possible extension queue 457. Compared 36125 event pairs, 489 based on Foata normal form. 18/5402 useless extension candidates. Maximal degree in co-relation 38013. Up to 3690 conditions per place. [2024-06-03 18:42:39,211 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 358 selfloop transitions, 137 changer transitions 0/501 dead transitions. [2024-06-03 18:42:39,211 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 441 places, 501 transitions, 7240 flow [2024-06-03 18:42:39,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 18:42:39,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 18:42:39,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 202 transitions. [2024-06-03 18:42:39,212 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5474254742547425 [2024-06-03 18:42:39,212 INFO L175 Difference]: Start difference. First operand has 433 places, 467 transitions, 5827 flow. Second operand 9 states and 202 transitions. [2024-06-03 18:42:39,212 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 441 places, 501 transitions, 7240 flow [2024-06-03 18:42:41,652 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 435 places, 501 transitions, 7060 flow, removed 10 selfloop flow, removed 6 redundant places. [2024-06-03 18:42:41,657 INFO L231 Difference]: Finished difference. Result has 436 places, 468 transitions, 5964 flow [2024-06-03 18:42:41,657 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5649, PETRI_DIFFERENCE_MINUEND_PLACES=427, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=467, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=136, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=331, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5964, PETRI_PLACES=436, PETRI_TRANSITIONS=468} [2024-06-03 18:42:41,658 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 394 predicate places. [2024-06-03 18:42:41,658 INFO L495 AbstractCegarLoop]: Abstraction has has 436 places, 468 transitions, 5964 flow [2024-06-03 18:42:41,658 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:42:41,658 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:42:41,658 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:42:41,658 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable165 [2024-06-03 18:42:41,658 INFO L420 AbstractCegarLoop]: === Iteration 167 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 18:42:41,659 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:42:41,659 INFO L85 PathProgramCache]: Analyzing trace with hash -1950766869, now seen corresponding path program 27 times [2024-06-03 18:42:41,659 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:42:41,659 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1375366383] [2024-06-03 18:42:41,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:42:41,659 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:42:41,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:42:41,784 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:42:41,785 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:42:41,785 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1375366383] [2024-06-03 18:42:41,785 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1375366383] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:42:41,785 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:42:41,785 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 18:42:41,785 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [490008836] [2024-06-03 18:42:41,785 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:42:41,786 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 18:42:41,786 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:42:41,786 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 18:42:41,786 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-03 18:42:41,845 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 18:42:41,846 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 436 places, 468 transitions, 5964 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:42:41,846 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:42:41,846 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 18:42:41,846 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:42:42,927 INFO L124 PetriNetUnfolderBase]: 3197/5365 cut-off events. [2024-06-03 18:42:42,927 INFO L125 PetriNetUnfolderBase]: For 437465/437477 co-relation queries the response was YES. [2024-06-03 18:42:42,980 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37819 conditions, 5365 events. 3197/5365 cut-off events. For 437465/437477 co-relation queries the response was YES. Maximal size of possible extension queue 455. Compared 36065 event pairs, 460 based on Foata normal form. 18/5383 useless extension candidates. Maximal degree in co-relation 37626. Up to 3774 conditions per place. [2024-06-03 18:42:43,002 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 380 selfloop transitions, 124 changer transitions 0/510 dead transitions. [2024-06-03 18:42:43,002 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 444 places, 510 transitions, 7132 flow [2024-06-03 18:42:43,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 18:42:43,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 18:42:43,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 213 transitions. [2024-06-03 18:42:43,003 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5772357723577236 [2024-06-03 18:42:43,003 INFO L175 Difference]: Start difference. First operand has 436 places, 468 transitions, 5964 flow. Second operand 9 states and 213 transitions. [2024-06-03 18:42:43,003 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 444 places, 510 transitions, 7132 flow [2024-06-03 18:42:45,159 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 435 places, 510 transitions, 6853 flow, removed 16 selfloop flow, removed 9 redundant places. [2024-06-03 18:42:45,164 INFO L231 Difference]: Finished difference. Result has 436 places, 468 transitions, 5941 flow [2024-06-03 18:42:45,164 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5685, PETRI_DIFFERENCE_MINUEND_PLACES=427, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=468, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=124, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=344, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5941, PETRI_PLACES=436, PETRI_TRANSITIONS=468} [2024-06-03 18:42:45,165 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 394 predicate places. [2024-06-03 18:42:45,165 INFO L495 AbstractCegarLoop]: Abstraction has has 436 places, 468 transitions, 5941 flow [2024-06-03 18:42:45,165 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:42:45,165 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:42:45,165 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:42:45,165 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable166 [2024-06-03 18:42:45,165 INFO L420 AbstractCegarLoop]: === Iteration 168 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 18:42:45,165 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:42:45,165 INFO L85 PathProgramCache]: Analyzing trace with hash -1950766683, now seen corresponding path program 26 times [2024-06-03 18:42:45,165 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:42:45,165 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [404825657] [2024-06-03 18:42:45,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:42:45,165 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:42:45,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:42:45,298 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:42:45,298 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:42:45,298 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [404825657] [2024-06-03 18:42:45,298 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [404825657] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:42:45,298 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:42:45,298 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 18:42:45,298 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [680092443] [2024-06-03 18:42:45,298 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:42:45,298 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 18:42:45,298 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:42:45,298 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 18:42:45,298 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-03 18:42:45,346 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 18:42:45,346 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 436 places, 468 transitions, 5941 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:42:45,346 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:42:45,346 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 18:42:45,346 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:42:46,470 INFO L124 PetriNetUnfolderBase]: 3184/5346 cut-off events. [2024-06-03 18:42:46,470 INFO L125 PetriNetUnfolderBase]: For 390590/390602 co-relation queries the response was YES. [2024-06-03 18:42:46,520 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36728 conditions, 5346 events. 3184/5346 cut-off events. For 390590/390602 co-relation queries the response was YES. Maximal size of possible extension queue 457. Compared 35924 event pairs, 480 based on Foata normal form. 18/5364 useless extension candidates. Maximal degree in co-relation 36537. Up to 3665 conditions per place. [2024-06-03 18:42:46,540 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 364 selfloop transitions, 134 changer transitions 0/504 dead transitions. [2024-06-03 18:42:46,540 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 444 places, 504 transitions, 7131 flow [2024-06-03 18:42:46,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 18:42:46,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 18:42:46,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 206 transitions. [2024-06-03 18:42:46,541 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5582655826558266 [2024-06-03 18:42:46,541 INFO L175 Difference]: Start difference. First operand has 436 places, 468 transitions, 5941 flow. Second operand 9 states and 206 transitions. [2024-06-03 18:42:46,541 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 444 places, 504 transitions, 7131 flow [2024-06-03 18:42:49,105 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 434 places, 504 transitions, 6821 flow, removed 10 selfloop flow, removed 10 redundant places. [2024-06-03 18:42:49,110 INFO L231 Difference]: Finished difference. Result has 435 places, 468 transitions, 5909 flow [2024-06-03 18:42:49,110 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5631, PETRI_DIFFERENCE_MINUEND_PLACES=426, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=468, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=134, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=334, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5909, PETRI_PLACES=435, PETRI_TRANSITIONS=468} [2024-06-03 18:42:49,110 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 393 predicate places. [2024-06-03 18:42:49,110 INFO L495 AbstractCegarLoop]: Abstraction has has 435 places, 468 transitions, 5909 flow [2024-06-03 18:42:49,110 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:42:49,111 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:42:49,111 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:42:49,111 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable167 [2024-06-03 18:42:49,111 INFO L420 AbstractCegarLoop]: === Iteration 169 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 18:42:49,111 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:42:49,111 INFO L85 PathProgramCache]: Analyzing trace with hash 638633651, now seen corresponding path program 1 times [2024-06-03 18:42:49,111 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:42:49,111 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [745913776] [2024-06-03 18:42:49,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:42:49,111 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:42:49,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:42:49,247 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:42:49,247 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:42:49,247 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [745913776] [2024-06-03 18:42:49,247 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [745913776] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:42:49,247 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:42:49,247 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 18:42:49,247 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [328716072] [2024-06-03 18:42:49,247 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:42:49,248 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 18:42:49,248 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:42:49,248 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 18:42:49,248 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-03 18:42:49,309 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 18:42:49,309 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 435 places, 468 transitions, 5909 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:42:49,309 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:42:49,309 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 18:42:49,310 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:42:50,400 INFO L124 PetriNetUnfolderBase]: 3204/5382 cut-off events. [2024-06-03 18:42:50,400 INFO L125 PetriNetUnfolderBase]: For 386653/386665 co-relation queries the response was YES. [2024-06-03 18:42:50,453 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36949 conditions, 5382 events. 3204/5382 cut-off events. For 386653/386665 co-relation queries the response was YES. Maximal size of possible extension queue 456. Compared 36342 event pairs, 704 based on Foata normal form. 18/5400 useless extension candidates. Maximal degree in co-relation 36758. Up to 4077 conditions per place. [2024-06-03 18:42:50,475 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 410 selfloop transitions, 95 changer transitions 0/511 dead transitions. [2024-06-03 18:42:50,475 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 443 places, 511 transitions, 7345 flow [2024-06-03 18:42:50,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 18:42:50,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 18:42:50,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 211 transitions. [2024-06-03 18:42:50,475 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5718157181571816 [2024-06-03 18:42:50,476 INFO L175 Difference]: Start difference. First operand has 435 places, 468 transitions, 5909 flow. Second operand 9 states and 211 transitions. [2024-06-03 18:42:50,476 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 443 places, 511 transitions, 7345 flow [2024-06-03 18:42:52,746 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 432 places, 511 transitions, 7039 flow, removed 6 selfloop flow, removed 11 redundant places. [2024-06-03 18:42:52,751 INFO L231 Difference]: Finished difference. Result has 433 places, 469 transitions, 5823 flow [2024-06-03 18:42:52,751 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5609, PETRI_DIFFERENCE_MINUEND_PLACES=424, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=468, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=94, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=374, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5823, PETRI_PLACES=433, PETRI_TRANSITIONS=469} [2024-06-03 18:42:52,751 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 391 predicate places. [2024-06-03 18:42:52,751 INFO L495 AbstractCegarLoop]: Abstraction has has 433 places, 469 transitions, 5823 flow [2024-06-03 18:42:52,751 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:42:52,751 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:42:52,751 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:42:52,752 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable168 [2024-06-03 18:42:52,752 INFO L420 AbstractCegarLoop]: === Iteration 170 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 18:42:52,752 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:42:52,752 INFO L85 PathProgramCache]: Analyzing trace with hash 638932553, now seen corresponding path program 1 times [2024-06-03 18:42:52,752 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:42:52,752 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2131744380] [2024-06-03 18:42:52,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:42:52,752 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:42:52,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:42:52,882 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:42:52,882 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:42:52,882 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2131744380] [2024-06-03 18:42:52,882 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2131744380] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:42:52,882 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:42:52,882 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 18:42:52,882 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2140949322] [2024-06-03 18:42:52,882 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:42:52,882 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 18:42:52,882 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:42:52,882 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 18:42:52,883 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-03 18:42:52,929 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 18:42:52,929 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 433 places, 469 transitions, 5823 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:42:52,929 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:42:52,929 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 18:42:52,929 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:42:54,047 INFO L124 PetriNetUnfolderBase]: 3311/5559 cut-off events. [2024-06-03 18:42:54,047 INFO L125 PetriNetUnfolderBase]: For 421051/421063 co-relation queries the response was YES. [2024-06-03 18:42:54,102 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38397 conditions, 5559 events. 3311/5559 cut-off events. For 421051/421063 co-relation queries the response was YES. Maximal size of possible extension queue 469. Compared 37718 event pairs, 742 based on Foata normal form. 18/5577 useless extension candidates. Maximal degree in co-relation 38208. Up to 4675 conditions per place. [2024-06-03 18:42:54,124 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 420 selfloop transitions, 81 changer transitions 0/507 dead transitions. [2024-06-03 18:42:54,125 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 441 places, 507 transitions, 7288 flow [2024-06-03 18:42:54,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 18:42:54,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 18:42:54,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 199 transitions. [2024-06-03 18:42:54,125 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5392953929539296 [2024-06-03 18:42:54,125 INFO L175 Difference]: Start difference. First operand has 433 places, 469 transitions, 5823 flow. Second operand 9 states and 199 transitions. [2024-06-03 18:42:54,125 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 441 places, 507 transitions, 7288 flow [2024-06-03 18:42:56,735 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 434 places, 507 transitions, 6999 flow, removed 10 selfloop flow, removed 7 redundant places. [2024-06-03 18:42:56,741 INFO L231 Difference]: Finished difference. Result has 437 places, 477 transitions, 5862 flow [2024-06-03 18:42:56,741 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5544, PETRI_DIFFERENCE_MINUEND_PLACES=426, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=469, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=389, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5862, PETRI_PLACES=437, PETRI_TRANSITIONS=477} [2024-06-03 18:42:56,741 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 395 predicate places. [2024-06-03 18:42:56,741 INFO L495 AbstractCegarLoop]: Abstraction has has 437 places, 477 transitions, 5862 flow [2024-06-03 18:42:56,741 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:42:56,741 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:42:56,741 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:42:56,741 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable169 [2024-06-03 18:42:56,741 INFO L420 AbstractCegarLoop]: === Iteration 171 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 18:42:56,742 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:42:56,742 INFO L85 PathProgramCache]: Analyzing trace with hash 638932181, now seen corresponding path program 2 times [2024-06-03 18:42:56,742 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:42:56,742 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [499516408] [2024-06-03 18:42:56,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:42:56,742 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:42:56,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:42:56,876 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:42:56,877 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:42:56,877 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [499516408] [2024-06-03 18:42:56,877 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [499516408] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:42:56,877 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:42:56,877 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 18:42:56,877 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [141215393] [2024-06-03 18:42:56,877 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:42:56,877 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 18:42:56,877 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:42:56,877 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 18:42:56,877 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-03 18:42:56,947 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 18:42:56,948 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 437 places, 477 transitions, 5862 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:42:56,948 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:42:56,948 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 18:42:56,948 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:42:58,088 INFO L124 PetriNetUnfolderBase]: 3331/5595 cut-off events. [2024-06-03 18:42:58,088 INFO L125 PetriNetUnfolderBase]: For 428257/428269 co-relation queries the response was YES. [2024-06-03 18:42:58,142 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38135 conditions, 5595 events. 3331/5595 cut-off events. For 428257/428269 co-relation queries the response was YES. Maximal size of possible extension queue 470. Compared 37997 event pairs, 717 based on Foata normal form. 18/5613 useless extension candidates. Maximal degree in co-relation 37944. Up to 4203 conditions per place. [2024-06-03 18:42:58,163 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 412 selfloop transitions, 100 changer transitions 0/518 dead transitions. [2024-06-03 18:42:58,163 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 445 places, 518 transitions, 7315 flow [2024-06-03 18:42:58,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 18:42:58,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 18:42:58,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 210 transitions. [2024-06-03 18:42:58,164 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5691056910569106 [2024-06-03 18:42:58,164 INFO L175 Difference]: Start difference. First operand has 437 places, 477 transitions, 5862 flow. Second operand 9 states and 210 transitions. [2024-06-03 18:42:58,164 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 445 places, 518 transitions, 7315 flow [2024-06-03 18:43:00,364 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 439 places, 518 transitions, 7159 flow, removed 13 selfloop flow, removed 6 redundant places. [2024-06-03 18:43:00,369 INFO L231 Difference]: Finished difference. Result has 440 places, 478 transitions, 5926 flow [2024-06-03 18:43:00,369 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5708, PETRI_DIFFERENCE_MINUEND_PLACES=431, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=477, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=99, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=378, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5926, PETRI_PLACES=440, PETRI_TRANSITIONS=478} [2024-06-03 18:43:00,369 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 398 predicate places. [2024-06-03 18:43:00,370 INFO L495 AbstractCegarLoop]: Abstraction has has 440 places, 478 transitions, 5926 flow [2024-06-03 18:43:00,370 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:43:00,370 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:43:00,370 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:43:00,370 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable170 [2024-06-03 18:43:00,370 INFO L420 AbstractCegarLoop]: === Iteration 172 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 18:43:00,370 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:43:00,370 INFO L85 PathProgramCache]: Analyzing trace with hash 727497941, now seen corresponding path program 3 times [2024-06-03 18:43:00,370 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:43:00,370 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1398833513] [2024-06-03 18:43:00,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:43:00,370 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:43:00,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:43:00,522 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:43:00,522 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:43:00,522 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1398833513] [2024-06-03 18:43:00,522 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1398833513] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:43:00,522 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:43:00,522 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 18:43:00,523 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2005372458] [2024-06-03 18:43:00,523 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:43:00,523 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 18:43:00,523 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:43:00,523 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 18:43:00,523 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-03 18:43:00,585 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 18:43:00,586 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 440 places, 478 transitions, 5926 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:43:00,586 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:43:00,586 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 18:43:00,586 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:43:01,861 INFO L124 PetriNetUnfolderBase]: 3351/5625 cut-off events. [2024-06-03 18:43:01,861 INFO L125 PetriNetUnfolderBase]: For 429283/429295 co-relation queries the response was YES. [2024-06-03 18:43:01,905 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38442 conditions, 5625 events. 3351/5625 cut-off events. For 429283/429295 co-relation queries the response was YES. Maximal size of possible extension queue 472. Compared 38241 event pairs, 804 based on Foata normal form. 18/5641 useless extension candidates. Maximal degree in co-relation 38251. Up to 4891 conditions per place. [2024-06-03 18:43:01,923 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 418 selfloop transitions, 88 changer transitions 0/512 dead transitions. [2024-06-03 18:43:01,923 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 449 places, 512 transitions, 7093 flow [2024-06-03 18:43:01,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 18:43:01,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 18:43:01,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 219 transitions. [2024-06-03 18:43:01,924 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5341463414634147 [2024-06-03 18:43:01,924 INFO L175 Difference]: Start difference. First operand has 440 places, 478 transitions, 5926 flow. Second operand 10 states and 219 transitions. [2024-06-03 18:43:01,924 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 449 places, 512 transitions, 7093 flow [2024-06-03 18:43:04,605 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 443 places, 512 transitions, 6936 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-06-03 18:43:04,610 INFO L231 Difference]: Finished difference. Result has 444 places, 479 transitions, 5967 flow [2024-06-03 18:43:04,610 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5770, PETRI_DIFFERENCE_MINUEND_PLACES=434, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=478, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=87, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=390, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5967, PETRI_PLACES=444, PETRI_TRANSITIONS=479} [2024-06-03 18:43:04,610 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 402 predicate places. [2024-06-03 18:43:04,610 INFO L495 AbstractCegarLoop]: Abstraction has has 444 places, 479 transitions, 5967 flow [2024-06-03 18:43:04,610 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:43:04,610 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:43:04,611 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:43:04,611 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable171 [2024-06-03 18:43:04,611 INFO L420 AbstractCegarLoop]: === Iteration 173 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 18:43:04,611 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:43:04,611 INFO L85 PathProgramCache]: Analyzing trace with hash 727646183, now seen corresponding path program 2 times [2024-06-03 18:43:04,611 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:43:04,611 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [277638994] [2024-06-03 18:43:04,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:43:04,611 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:43:04,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:43:04,746 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:43:04,747 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:43:04,747 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [277638994] [2024-06-03 18:43:04,747 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [277638994] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:43:04,747 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:43:04,747 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 18:43:04,747 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1690486108] [2024-06-03 18:43:04,747 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:43:04,747 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 18:43:04,747 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:43:04,747 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 18:43:04,747 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2024-06-03 18:43:04,794 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 18:43:04,795 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 444 places, 479 transitions, 5967 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:43:04,795 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:43:04,795 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 18:43:04,795 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:43:05,926 INFO L124 PetriNetUnfolderBase]: 3379/5675 cut-off events. [2024-06-03 18:43:05,926 INFO L125 PetriNetUnfolderBase]: For 449554/449566 co-relation queries the response was YES. [2024-06-03 18:43:05,982 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38788 conditions, 5675 events. 3379/5675 cut-off events. For 449554/449566 co-relation queries the response was YES. Maximal size of possible extension queue 474. Compared 38712 event pairs, 818 based on Foata normal form. 20/5695 useless extension candidates. Maximal degree in co-relation 38596. Up to 5064 conditions per place. [2024-06-03 18:43:06,004 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 427 selfloop transitions, 67 changer transitions 0/500 dead transitions. [2024-06-03 18:43:06,004 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 452 places, 500 transitions, 7068 flow [2024-06-03 18:43:06,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 18:43:06,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 18:43:06,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 192 transitions. [2024-06-03 18:43:06,005 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5203252032520326 [2024-06-03 18:43:06,005 INFO L175 Difference]: Start difference. First operand has 444 places, 479 transitions, 5967 flow. Second operand 9 states and 192 transitions. [2024-06-03 18:43:06,005 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 452 places, 500 transitions, 7068 flow [2024-06-03 18:43:08,723 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 444 places, 500 transitions, 6891 flow, removed 2 selfloop flow, removed 8 redundant places. [2024-06-03 18:43:08,728 INFO L231 Difference]: Finished difference. Result has 445 places, 480 transitions, 5961 flow [2024-06-03 18:43:08,728 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5790, PETRI_DIFFERENCE_MINUEND_PLACES=436, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=479, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=412, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5961, PETRI_PLACES=445, PETRI_TRANSITIONS=480} [2024-06-03 18:43:08,728 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 403 predicate places. [2024-06-03 18:43:08,728 INFO L495 AbstractCegarLoop]: Abstraction has has 445 places, 480 transitions, 5961 flow [2024-06-03 18:43:08,728 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:43:08,728 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:43:08,729 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:43:08,729 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable172 [2024-06-03 18:43:08,729 INFO L420 AbstractCegarLoop]: === Iteration 174 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 18:43:08,729 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:43:08,729 INFO L85 PathProgramCache]: Analyzing trace with hash 640806503, now seen corresponding path program 3 times [2024-06-03 18:43:08,729 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:43:08,729 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1816144019] [2024-06-03 18:43:08,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:43:08,729 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:43:08,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:43:08,866 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:43:08,866 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:43:08,866 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1816144019] [2024-06-03 18:43:08,866 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1816144019] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:43:08,866 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:43:08,866 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 18:43:08,866 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1768599740] [2024-06-03 18:43:08,866 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:43:08,866 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 18:43:08,866 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:43:08,866 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 18:43:08,867 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-03 18:43:08,933 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 18:43:08,933 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 445 places, 480 transitions, 5961 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:43:08,933 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:43:08,933 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 18:43:08,933 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:43:10,071 INFO L124 PetriNetUnfolderBase]: 3399/5705 cut-off events. [2024-06-03 18:43:10,071 INFO L125 PetriNetUnfolderBase]: For 445312/445324 co-relation queries the response was YES. [2024-06-03 18:43:10,130 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39048 conditions, 5705 events. 3399/5705 cut-off events. For 445312/445324 co-relation queries the response was YES. Maximal size of possible extension queue 477. Compared 38917 event pairs, 806 based on Foata normal form. 18/5723 useless extension candidates. Maximal degree in co-relation 38855. Up to 5036 conditions per place. [2024-06-03 18:43:10,154 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 427 selfloop transitions, 73 changer transitions 0/506 dead transitions. [2024-06-03 18:43:10,154 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 454 places, 506 transitions, 7114 flow [2024-06-03 18:43:10,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 18:43:10,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 18:43:10,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 212 transitions. [2024-06-03 18:43:10,155 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5170731707317073 [2024-06-03 18:43:10,155 INFO L175 Difference]: Start difference. First operand has 445 places, 480 transitions, 5961 flow. Second operand 10 states and 212 transitions. [2024-06-03 18:43:10,155 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 454 places, 506 transitions, 7114 flow [2024-06-03 18:43:13,006 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 447 places, 506 transitions, 6974 flow, removed 6 selfloop flow, removed 7 redundant places. [2024-06-03 18:43:13,011 INFO L231 Difference]: Finished difference. Result has 449 places, 482 transitions, 6026 flow [2024-06-03 18:43:13,011 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5821, PETRI_DIFFERENCE_MINUEND_PLACES=438, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=480, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=407, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6026, PETRI_PLACES=449, PETRI_TRANSITIONS=482} [2024-06-03 18:43:13,011 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 407 predicate places. [2024-06-03 18:43:13,012 INFO L495 AbstractCegarLoop]: Abstraction has has 449 places, 482 transitions, 6026 flow [2024-06-03 18:43:13,012 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:43:13,012 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:43:13,012 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:43:13,012 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable173 [2024-06-03 18:43:13,012 INFO L420 AbstractCegarLoop]: === Iteration 175 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 18:43:13,012 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:43:13,012 INFO L85 PathProgramCache]: Analyzing trace with hash -172283289, now seen corresponding path program 4 times [2024-06-03 18:43:13,012 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:43:13,012 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2068954261] [2024-06-03 18:43:13,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:43:13,012 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:43:13,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:43:13,169 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:43:13,170 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:43:13,170 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2068954261] [2024-06-03 18:43:13,170 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2068954261] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:43:13,170 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:43:13,170 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 18:43:13,170 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1465460008] [2024-06-03 18:43:13,170 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:43:13,170 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 18:43:13,170 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:43:13,170 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 18:43:13,170 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-03 18:43:13,230 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 18:43:13,231 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 449 places, 482 transitions, 6026 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:43:13,231 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:43:13,231 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 18:43:13,231 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:43:14,433 INFO L124 PetriNetUnfolderBase]: 3427/5751 cut-off events. [2024-06-03 18:43:14,433 INFO L125 PetriNetUnfolderBase]: For 467205/467217 co-relation queries the response was YES. [2024-06-03 18:43:14,485 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39568 conditions, 5751 events. 3427/5751 cut-off events. For 467205/467217 co-relation queries the response was YES. Maximal size of possible extension queue 481. Compared 39348 event pairs, 826 based on Foata normal form. 20/5771 useless extension candidates. Maximal degree in co-relation 39373. Up to 5171 conditions per place. [2024-06-03 18:43:14,505 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 447 selfloop transitions, 48 changer transitions 0/501 dead transitions. [2024-06-03 18:43:14,505 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 455 places, 501 transitions, 7129 flow [2024-06-03 18:43:14,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 18:43:14,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 18:43:14,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 157 transitions. [2024-06-03 18:43:14,506 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5470383275261324 [2024-06-03 18:43:14,506 INFO L175 Difference]: Start difference. First operand has 449 places, 482 transitions, 6026 flow. Second operand 7 states and 157 transitions. [2024-06-03 18:43:14,506 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 455 places, 501 transitions, 7129 flow [2024-06-03 18:43:17,325 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 447 places, 501 transitions, 6975 flow, removed 11 selfloop flow, removed 8 redundant places. [2024-06-03 18:43:17,330 INFO L231 Difference]: Finished difference. Result has 448 places, 483 transitions, 6009 flow [2024-06-03 18:43:17,330 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5872, PETRI_DIFFERENCE_MINUEND_PLACES=441, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=482, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=434, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6009, PETRI_PLACES=448, PETRI_TRANSITIONS=483} [2024-06-03 18:43:17,330 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 406 predicate places. [2024-06-03 18:43:17,330 INFO L495 AbstractCegarLoop]: Abstraction has has 448 places, 483 transitions, 6009 flow [2024-06-03 18:43:17,330 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:43:17,331 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:43:17,331 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:43:17,331 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable174 [2024-06-03 18:43:17,331 INFO L420 AbstractCegarLoop]: === Iteration 176 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 18:43:17,331 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:43:17,331 INFO L85 PathProgramCache]: Analyzing trace with hash -166920909, now seen corresponding path program 5 times [2024-06-03 18:43:17,331 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:43:17,331 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [389397785] [2024-06-03 18:43:17,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:43:17,332 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:43:17,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:43:17,477 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:43:17,477 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:43:17,477 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [389397785] [2024-06-03 18:43:17,477 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [389397785] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:43:17,477 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:43:17,477 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 18:43:17,477 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1842314929] [2024-06-03 18:43:17,477 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:43:17,478 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 18:43:17,478 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:43:17,478 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 18:43:17,478 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-03 18:43:17,528 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 18:43:17,529 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 448 places, 483 transitions, 6009 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:43:17,529 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:43:17,529 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 18:43:17,529 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:43:18,716 INFO L124 PetriNetUnfolderBase]: 3455/5799 cut-off events. [2024-06-03 18:43:18,716 INFO L125 PetriNetUnfolderBase]: For 468072/468084 co-relation queries the response was YES. [2024-06-03 18:43:18,773 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39869 conditions, 5799 events. 3455/5799 cut-off events. For 468072/468084 co-relation queries the response was YES. Maximal size of possible extension queue 485. Compared 39722 event pairs, 832 based on Foata normal form. 20/5819 useless extension candidates. Maximal degree in co-relation 39674. Up to 5215 conditions per place. [2024-06-03 18:43:18,796 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 449 selfloop transitions, 48 changer transitions 0/503 dead transitions. [2024-06-03 18:43:18,796 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 455 places, 503 transitions, 7120 flow [2024-06-03 18:43:18,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 18:43:18,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 18:43:18,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 174 transitions. [2024-06-03 18:43:18,797 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5304878048780488 [2024-06-03 18:43:18,797 INFO L175 Difference]: Start difference. First operand has 448 places, 483 transitions, 6009 flow. Second operand 8 states and 174 transitions. [2024-06-03 18:43:18,797 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 455 places, 503 transitions, 7120 flow [2024-06-03 18:43:21,874 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 450 places, 503 transitions, 7014 flow, removed 8 selfloop flow, removed 5 redundant places. [2024-06-03 18:43:21,879 INFO L231 Difference]: Finished difference. Result has 451 places, 484 transitions, 6042 flow [2024-06-03 18:43:21,879 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5903, PETRI_DIFFERENCE_MINUEND_PLACES=443, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=483, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=435, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6042, PETRI_PLACES=451, PETRI_TRANSITIONS=484} [2024-06-03 18:43:21,879 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 409 predicate places. [2024-06-03 18:43:21,879 INFO L495 AbstractCegarLoop]: Abstraction has has 451 places, 484 transitions, 6042 flow [2024-06-03 18:43:21,879 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:43:21,879 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:43:21,879 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:43:21,880 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable175 [2024-06-03 18:43:21,880 INFO L420 AbstractCegarLoop]: === Iteration 177 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 18:43:21,880 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:43:21,880 INFO L85 PathProgramCache]: Analyzing trace with hash -172431159, now seen corresponding path program 6 times [2024-06-03 18:43:21,880 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:43:21,880 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [851060956] [2024-06-03 18:43:21,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:43:21,880 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:43:21,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:43:22,030 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:43:22,030 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:43:22,030 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [851060956] [2024-06-03 18:43:22,030 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [851060956] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:43:22,030 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:43:22,030 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 18:43:22,031 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [898006463] [2024-06-03 18:43:22,031 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:43:22,031 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 18:43:22,031 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:43:22,031 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 18:43:22,031 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-03 18:43:22,086 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 18:43:22,086 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 451 places, 484 transitions, 6042 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:43:22,086 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:43:22,086 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 18:43:22,086 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:43:23,321 INFO L124 PetriNetUnfolderBase]: 3500/5870 cut-off events. [2024-06-03 18:43:23,321 INFO L125 PetriNetUnfolderBase]: For 463195/463207 co-relation queries the response was YES. [2024-06-03 18:43:23,382 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40386 conditions, 5870 events. 3500/5870 cut-off events. For 463195/463207 co-relation queries the response was YES. Maximal size of possible extension queue 489. Compared 40142 event pairs, 760 based on Foata normal form. 18/5888 useless extension candidates. Maximal degree in co-relation 40190. Up to 5126 conditions per place. [2024-06-03 18:43:23,406 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 450 selfloop transitions, 57 changer transitions 0/513 dead transitions. [2024-06-03 18:43:23,406 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 457 places, 513 transitions, 7256 flow [2024-06-03 18:43:23,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 18:43:23,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 18:43:23,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 163 transitions. [2024-06-03 18:43:23,407 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5679442508710801 [2024-06-03 18:43:23,407 INFO L175 Difference]: Start difference. First operand has 451 places, 484 transitions, 6042 flow. Second operand 7 states and 163 transitions. [2024-06-03 18:43:23,407 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 457 places, 513 transitions, 7256 flow [2024-06-03 18:43:25,974 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 451 places, 513 transitions, 7148 flow, removed 9 selfloop flow, removed 6 redundant places. [2024-06-03 18:43:25,985 INFO L231 Difference]: Finished difference. Result has 453 places, 489 transitions, 6169 flow [2024-06-03 18:43:25,986 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5934, PETRI_DIFFERENCE_MINUEND_PLACES=445, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=484, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=427, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6169, PETRI_PLACES=453, PETRI_TRANSITIONS=489} [2024-06-03 18:43:25,986 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 411 predicate places. [2024-06-03 18:43:25,986 INFO L495 AbstractCegarLoop]: Abstraction has has 453 places, 489 transitions, 6169 flow [2024-06-03 18:43:25,987 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:43:25,987 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:43:25,987 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:43:25,987 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable176 [2024-06-03 18:43:25,987 INFO L420 AbstractCegarLoop]: === Iteration 178 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 18:43:25,987 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:43:25,987 INFO L85 PathProgramCache]: Analyzing trace with hash -172431531, now seen corresponding path program 4 times [2024-06-03 18:43:25,987 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:43:25,987 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2129261086] [2024-06-03 18:43:25,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:43:25,988 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:43:25,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:43:26,137 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:43:26,137 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:43:26,138 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2129261086] [2024-06-03 18:43:26,138 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2129261086] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:43:26,138 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:43:26,138 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 18:43:26,138 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1891398463] [2024-06-03 18:43:26,138 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:43:26,138 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 18:43:26,138 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:43:26,138 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 18:43:26,138 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-03 18:43:26,199 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 18:43:26,199 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 453 places, 489 transitions, 6169 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:43:26,199 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:43:26,199 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 18:43:26,199 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:43:27,377 INFO L124 PetriNetUnfolderBase]: 3487/5853 cut-off events. [2024-06-03 18:43:27,378 INFO L125 PetriNetUnfolderBase]: For 430656/430668 co-relation queries the response was YES. [2024-06-03 18:43:27,437 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39802 conditions, 5853 events. 3487/5853 cut-off events. For 430656/430668 co-relation queries the response was YES. Maximal size of possible extension queue 489. Compared 40140 event pairs, 721 based on Foata normal form. 18/5871 useless extension candidates. Maximal degree in co-relation 39604. Up to 4754 conditions per place. [2024-06-03 18:43:27,460 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 434 selfloop transitions, 82 changer transitions 0/522 dead transitions. [2024-06-03 18:43:27,461 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 459 places, 522 transitions, 7343 flow [2024-06-03 18:43:27,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 18:43:27,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 18:43:27,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 172 transitions. [2024-06-03 18:43:27,461 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5993031358885017 [2024-06-03 18:43:27,461 INFO L175 Difference]: Start difference. First operand has 453 places, 489 transitions, 6169 flow. Second operand 7 states and 172 transitions. [2024-06-03 18:43:27,461 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 459 places, 522 transitions, 7343 flow [2024-06-03 18:43:30,093 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 454 places, 522 transitions, 7222 flow, removed 16 selfloop flow, removed 5 redundant places. [2024-06-03 18:43:30,099 INFO L231 Difference]: Finished difference. Result has 455 places, 489 transitions, 6222 flow [2024-06-03 18:43:30,099 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6048, PETRI_DIFFERENCE_MINUEND_PLACES=448, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=489, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=407, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6222, PETRI_PLACES=455, PETRI_TRANSITIONS=489} [2024-06-03 18:43:30,100 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 413 predicate places. [2024-06-03 18:43:30,100 INFO L495 AbstractCegarLoop]: Abstraction has has 455 places, 489 transitions, 6222 flow [2024-06-03 18:43:30,100 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:43:30,100 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:43:30,100 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:43:30,100 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable177 [2024-06-03 18:43:30,100 INFO L420 AbstractCegarLoop]: === Iteration 179 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 18:43:30,100 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:43:30,100 INFO L85 PathProgramCache]: Analyzing trace with hash -166705707, now seen corresponding path program 1 times [2024-06-03 18:43:30,100 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:43:30,100 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [441004780] [2024-06-03 18:43:30,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:43:30,100 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:43:30,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:43:30,242 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:43:30,243 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:43:30,243 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [441004780] [2024-06-03 18:43:30,243 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [441004780] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:43:30,243 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:43:30,243 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 18:43:30,243 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [411623733] [2024-06-03 18:43:30,243 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:43:30,243 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 18:43:30,243 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:43:30,243 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 18:43:30,243 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-03 18:43:30,293 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 18:43:30,293 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 455 places, 489 transitions, 6222 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:43:30,294 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:43:30,294 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 18:43:30,294 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:43:31,552 INFO L124 PetriNetUnfolderBase]: 3507/5887 cut-off events. [2024-06-03 18:43:31,552 INFO L125 PetriNetUnfolderBase]: For 431909/431921 co-relation queries the response was YES. [2024-06-03 18:43:31,607 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40032 conditions, 5887 events. 3507/5887 cut-off events. For 431909/431921 co-relation queries the response was YES. Maximal size of possible extension queue 490. Compared 40307 event pairs, 798 based on Foata normal form. 18/5905 useless extension candidates. Maximal degree in co-relation 39834. Up to 5155 conditions per place. [2024-06-03 18:43:31,629 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 448 selfloop transitions, 58 changer transitions 0/512 dead transitions. [2024-06-03 18:43:31,629 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 462 places, 512 transitions, 7368 flow [2024-06-03 18:43:31,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 18:43:31,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 18:43:31,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 177 transitions. [2024-06-03 18:43:31,630 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5396341463414634 [2024-06-03 18:43:31,630 INFO L175 Difference]: Start difference. First operand has 455 places, 489 transitions, 6222 flow. Second operand 8 states and 177 transitions. [2024-06-03 18:43:31,630 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 462 places, 512 transitions, 7368 flow [2024-06-03 18:43:34,683 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 454 places, 512 transitions, 7139 flow, removed 3 selfloop flow, removed 8 redundant places. [2024-06-03 18:43:34,688 INFO L231 Difference]: Finished difference. Result has 455 places, 490 transitions, 6143 flow [2024-06-03 18:43:34,688 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5993, PETRI_DIFFERENCE_MINUEND_PLACES=447, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=489, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=431, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6143, PETRI_PLACES=455, PETRI_TRANSITIONS=490} [2024-06-03 18:43:34,688 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 413 predicate places. [2024-06-03 18:43:34,688 INFO L495 AbstractCegarLoop]: Abstraction has has 455 places, 490 transitions, 6143 flow [2024-06-03 18:43:34,688 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:43:34,688 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:43:34,689 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:43:34,689 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable178 [2024-06-03 18:43:34,689 INFO L420 AbstractCegarLoop]: === Iteration 180 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 18:43:34,689 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:43:34,689 INFO L85 PathProgramCache]: Analyzing trace with hash -166705893, now seen corresponding path program 1 times [2024-06-03 18:43:34,689 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:43:34,689 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [452195936] [2024-06-03 18:43:34,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:43:34,689 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:43:34,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:43:34,842 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:43:34,842 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:43:34,842 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [452195936] [2024-06-03 18:43:34,842 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [452195936] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:43:34,842 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:43:34,843 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 18:43:34,843 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1642349670] [2024-06-03 18:43:34,843 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:43:34,843 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 18:43:34,843 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:43:34,843 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 18:43:34,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-03 18:43:34,908 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 18:43:34,908 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 455 places, 490 transitions, 6143 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:43:34,908 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:43:34,908 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 18:43:34,908 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:43:36,113 INFO L124 PetriNetUnfolderBase]: 3543/5943 cut-off events. [2024-06-03 18:43:36,113 INFO L125 PetriNetUnfolderBase]: For 424883/424895 co-relation queries the response was YES. [2024-06-03 18:43:36,174 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40129 conditions, 5943 events. 3543/5943 cut-off events. For 424883/424895 co-relation queries the response was YES. Maximal size of possible extension queue 495. Compared 40767 event pairs, 748 based on Foata normal form. 18/5961 useless extension candidates. Maximal degree in co-relation 39931. Up to 5137 conditions per place. [2024-06-03 18:43:36,361 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 442 selfloop transitions, 72 changer transitions 0/520 dead transitions. [2024-06-03 18:43:36,361 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 462 places, 520 transitions, 7359 flow [2024-06-03 18:43:36,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 18:43:36,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 18:43:36,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 180 transitions. [2024-06-03 18:43:36,361 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5487804878048781 [2024-06-03 18:43:36,361 INFO L175 Difference]: Start difference. First operand has 455 places, 490 transitions, 6143 flow. Second operand 8 states and 180 transitions. [2024-06-03 18:43:36,362 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 462 places, 520 transitions, 7359 flow [2024-06-03 18:43:38,827 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 455 places, 520 transitions, 7218 flow, removed 10 selfloop flow, removed 7 redundant places. [2024-06-03 18:43:38,833 INFO L231 Difference]: Finished difference. Result has 457 places, 495 transitions, 6255 flow [2024-06-03 18:43:38,833 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6009, PETRI_DIFFERENCE_MINUEND_PLACES=448, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=490, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=418, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6255, PETRI_PLACES=457, PETRI_TRANSITIONS=495} [2024-06-03 18:43:38,833 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 415 predicate places. [2024-06-03 18:43:38,833 INFO L495 AbstractCegarLoop]: Abstraction has has 457 places, 495 transitions, 6255 flow [2024-06-03 18:43:38,833 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:43:38,833 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:43:38,833 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:43:38,833 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable179 [2024-06-03 18:43:38,834 INFO L420 AbstractCegarLoop]: === Iteration 181 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 18:43:38,834 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:43:38,834 INFO L85 PathProgramCache]: Analyzing trace with hash 463974589, now seen corresponding path program 2 times [2024-06-03 18:43:38,834 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:43:38,834 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2074976558] [2024-06-03 18:43:38,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:43:38,834 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:43:38,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:43:38,979 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:43:38,979 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:43:38,979 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2074976558] [2024-06-03 18:43:38,979 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2074976558] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:43:38,979 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:43:38,979 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 18:43:38,979 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1852189915] [2024-06-03 18:43:38,979 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:43:38,979 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 18:43:38,979 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:43:38,980 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 18:43:38,980 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-03 18:43:39,068 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 18:43:39,068 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 457 places, 495 transitions, 6255 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:43:39,068 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:43:39,068 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 18:43:39,068 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:43:40,264 INFO L124 PetriNetUnfolderBase]: 3563/5975 cut-off events. [2024-06-03 18:43:40,264 INFO L125 PetriNetUnfolderBase]: For 425459/425471 co-relation queries the response was YES. [2024-06-03 18:43:40,324 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40517 conditions, 5975 events. 3563/5975 cut-off events. For 425459/425471 co-relation queries the response was YES. Maximal size of possible extension queue 496. Compared 40971 event pairs, 804 based on Foata normal form. 18/5993 useless extension candidates. Maximal degree in co-relation 40318. Up to 5423 conditions per place. [2024-06-03 18:43:40,347 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 471 selfloop transitions, 35 changer transitions 0/512 dead transitions. [2024-06-03 18:43:40,347 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 463 places, 512 transitions, 7351 flow [2024-06-03 18:43:40,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 18:43:40,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 18:43:40,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 151 transitions. [2024-06-03 18:43:40,348 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5261324041811847 [2024-06-03 18:43:40,348 INFO L175 Difference]: Start difference. First operand has 457 places, 495 transitions, 6255 flow. Second operand 7 states and 151 transitions. [2024-06-03 18:43:40,348 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 463 places, 512 transitions, 7351 flow [2024-06-03 18:43:43,069 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 457 places, 512 transitions, 7218 flow, removed 10 selfloop flow, removed 6 redundant places. [2024-06-03 18:43:43,228 INFO L231 Difference]: Finished difference. Result has 458 places, 496 transitions, 6224 flow [2024-06-03 18:43:43,229 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6122, PETRI_DIFFERENCE_MINUEND_PLACES=451, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=495, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=460, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6224, PETRI_PLACES=458, PETRI_TRANSITIONS=496} [2024-06-03 18:43:43,229 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 416 predicate places. [2024-06-03 18:43:43,229 INFO L495 AbstractCegarLoop]: Abstraction has has 458 places, 496 transitions, 6224 flow [2024-06-03 18:43:43,229 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:43:43,229 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:43:43,229 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:43:43,229 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable180 [2024-06-03 18:43:43,229 INFO L420 AbstractCegarLoop]: === Iteration 182 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 18:43:43,229 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:43:43,229 INFO L85 PathProgramCache]: Analyzing trace with hash 463854619, now seen corresponding path program 3 times [2024-06-03 18:43:43,229 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:43:43,229 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [401482976] [2024-06-03 18:43:43,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:43:43,230 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:43:43,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:43:43,373 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:43:43,374 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:43:43,374 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [401482976] [2024-06-03 18:43:43,374 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [401482976] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:43:43,374 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:43:43,374 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 18:43:43,374 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1331870769] [2024-06-03 18:43:43,374 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:43:43,374 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 18:43:43,374 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:43:43,374 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 18:43:43,374 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-03 18:43:43,424 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 18:43:43,425 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 458 places, 496 transitions, 6224 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:43:43,425 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:43:43,425 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 18:43:43,425 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:43:44,644 INFO L124 PetriNetUnfolderBase]: 3583/6009 cut-off events. [2024-06-03 18:43:44,644 INFO L125 PetriNetUnfolderBase]: For 426092/426096 co-relation queries the response was YES. [2024-06-03 18:43:44,706 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40580 conditions, 6009 events. 3583/6009 cut-off events. For 426092/426096 co-relation queries the response was YES. Maximal size of possible extension queue 499. Compared 41161 event pairs, 831 based on Foata normal form. 10/6018 useless extension candidates. Maximal degree in co-relation 40381. Up to 4769 conditions per place. [2024-06-03 18:43:44,730 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 412 selfloop transitions, 100 changer transitions 0/518 dead transitions. [2024-06-03 18:43:44,730 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 464 places, 518 transitions, 7410 flow [2024-06-03 18:43:44,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 18:43:44,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 18:43:44,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 157 transitions. [2024-06-03 18:43:44,730 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5470383275261324 [2024-06-03 18:43:44,730 INFO L175 Difference]: Start difference. First operand has 458 places, 496 transitions, 6224 flow. Second operand 7 states and 157 transitions. [2024-06-03 18:43:44,731 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 464 places, 518 transitions, 7410 flow [2024-06-03 18:43:47,414 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 457 places, 518 transitions, 7236 flow, removed 14 selfloop flow, removed 7 redundant places. [2024-06-03 18:43:47,419 INFO L231 Difference]: Finished difference. Result has 458 places, 497 transitions, 6284 flow [2024-06-03 18:43:47,420 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6050, PETRI_DIFFERENCE_MINUEND_PLACES=451, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=496, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=99, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=396, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6284, PETRI_PLACES=458, PETRI_TRANSITIONS=497} [2024-06-03 18:43:47,420 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 416 predicate places. [2024-06-03 18:43:47,420 INFO L495 AbstractCegarLoop]: Abstraction has has 458 places, 497 transitions, 6284 flow [2024-06-03 18:43:47,420 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:43:47,420 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:43:47,420 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:43:47,420 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable181 [2024-06-03 18:43:47,420 INFO L420 AbstractCegarLoop]: === Iteration 183 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 18:43:47,420 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:43:47,420 INFO L85 PathProgramCache]: Analyzing trace with hash -2040804551, now seen corresponding path program 27 times [2024-06-03 18:43:47,421 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:43:47,421 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1322499058] [2024-06-03 18:43:47,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:43:47,421 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:43:47,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:43:47,552 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:43:47,552 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:43:47,552 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1322499058] [2024-06-03 18:43:47,552 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1322499058] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:43:47,552 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:43:47,552 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 18:43:47,552 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [489999777] [2024-06-03 18:43:47,553 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:43:47,553 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 18:43:47,553 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:43:47,553 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 18:43:47,553 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2024-06-03 18:43:47,596 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 18:43:47,596 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 458 places, 497 transitions, 6284 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:43:47,596 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:43:47,596 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 18:43:47,596 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:43:48,824 INFO L124 PetriNetUnfolderBase]: 3611/6055 cut-off events. [2024-06-03 18:43:48,824 INFO L125 PetriNetUnfolderBase]: For 448062/448074 co-relation queries the response was YES. [2024-06-03 18:43:48,885 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40977 conditions, 6055 events. 3611/6055 cut-off events. For 448062/448074 co-relation queries the response was YES. Maximal size of possible extension queue 502. Compared 41655 event pairs, 867 based on Foata normal form. 20/6075 useless extension candidates. Maximal degree in co-relation 40779. Up to 5431 conditions per place. [2024-06-03 18:43:48,908 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 445 selfloop transitions, 70 changer transitions 0/521 dead transitions. [2024-06-03 18:43:48,908 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 466 places, 521 transitions, 7442 flow [2024-06-03 18:43:48,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 18:43:48,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 18:43:48,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 195 transitions. [2024-06-03 18:43:48,909 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5284552845528455 [2024-06-03 18:43:48,909 INFO L175 Difference]: Start difference. First operand has 458 places, 497 transitions, 6284 flow. Second operand 9 states and 195 transitions. [2024-06-03 18:43:48,909 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 466 places, 521 transitions, 7442 flow [2024-06-03 18:43:51,334 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 461 places, 521 transitions, 7226 flow, removed 9 selfloop flow, removed 5 redundant places. [2024-06-03 18:43:51,339 INFO L231 Difference]: Finished difference. Result has 462 places, 498 transitions, 6248 flow [2024-06-03 18:43:51,339 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6068, PETRI_DIFFERENCE_MINUEND_PLACES=453, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=497, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=427, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6248, PETRI_PLACES=462, PETRI_TRANSITIONS=498} [2024-06-03 18:43:51,340 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 420 predicate places. [2024-06-03 18:43:51,340 INFO L495 AbstractCegarLoop]: Abstraction has has 462 places, 498 transitions, 6248 flow [2024-06-03 18:43:51,340 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:43:51,340 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:43:51,340 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:43:51,340 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable182 [2024-06-03 18:43:51,340 INFO L420 AbstractCegarLoop]: === Iteration 184 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 18:43:51,341 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:43:51,341 INFO L85 PathProgramCache]: Analyzing trace with hash -2019255751, now seen corresponding path program 28 times [2024-06-03 18:43:51,341 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:43:51,341 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1323359158] [2024-06-03 18:43:51,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:43:51,341 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:43:51,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:43:51,473 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:43:51,473 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:43:51,473 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1323359158] [2024-06-03 18:43:51,473 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1323359158] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:43:51,473 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:43:51,473 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 18:43:51,473 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1731436762] [2024-06-03 18:43:51,473 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:43:51,473 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 18:43:51,473 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:43:51,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 18:43:51,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2024-06-03 18:43:51,515 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 18:43:51,515 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 462 places, 498 transitions, 6248 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:43:51,515 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:43:51,515 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 18:43:51,515 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:43:52,803 INFO L124 PetriNetUnfolderBase]: 3639/6097 cut-off events. [2024-06-03 18:43:52,803 INFO L125 PetriNetUnfolderBase]: For 454985/454989 co-relation queries the response was YES. [2024-06-03 18:43:52,854 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41148 conditions, 6097 events. 3639/6097 cut-off events. For 454985/454989 co-relation queries the response was YES. Maximal size of possible extension queue 506. Compared 42077 event pairs, 895 based on Foata normal form. 12/6108 useless extension candidates. Maximal degree in co-relation 40949. Up to 5468 conditions per place. [2024-06-03 18:43:52,876 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 420 selfloop transitions, 89 changer transitions 0/515 dead transitions. [2024-06-03 18:43:52,876 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 469 places, 515 transitions, 7378 flow [2024-06-03 18:43:52,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 18:43:52,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 18:43:52,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 170 transitions. [2024-06-03 18:43:52,877 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5182926829268293 [2024-06-03 18:43:52,877 INFO L175 Difference]: Start difference. First operand has 462 places, 498 transitions, 6248 flow. Second operand 8 states and 170 transitions. [2024-06-03 18:43:52,877 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 469 places, 515 transitions, 7378 flow [2024-06-03 18:43:55,319 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 462 places, 515 transitions, 7228 flow, removed 8 selfloop flow, removed 7 redundant places. [2024-06-03 18:43:55,324 INFO L231 Difference]: Finished difference. Result has 463 places, 499 transitions, 6315 flow [2024-06-03 18:43:55,324 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6098, PETRI_DIFFERENCE_MINUEND_PLACES=455, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=498, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=409, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6315, PETRI_PLACES=463, PETRI_TRANSITIONS=499} [2024-06-03 18:43:55,324 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 421 predicate places. [2024-06-03 18:43:55,324 INFO L495 AbstractCegarLoop]: Abstraction has has 463 places, 499 transitions, 6315 flow [2024-06-03 18:43:55,325 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:43:55,325 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:43:55,325 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:43:55,325 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable183 [2024-06-03 18:43:55,325 INFO L420 AbstractCegarLoop]: === Iteration 185 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 18:43:55,325 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:43:55,325 INFO L85 PathProgramCache]: Analyzing trace with hash -2022112711, now seen corresponding path program 29 times [2024-06-03 18:43:55,325 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:43:55,325 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1438615991] [2024-06-03 18:43:55,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:43:55,326 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:43:55,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:43:55,453 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:43:55,453 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:43:55,453 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1438615991] [2024-06-03 18:43:55,453 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1438615991] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:43:55,453 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:43:55,453 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 18:43:55,453 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1560685206] [2024-06-03 18:43:55,453 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:43:55,453 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 18:43:55,453 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:43:55,454 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 18:43:55,454 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-03 18:43:55,501 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 18:43:55,501 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 463 places, 499 transitions, 6315 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:43:55,501 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:43:55,501 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 18:43:55,501 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:43:56,717 INFO L124 PetriNetUnfolderBase]: 3654/6122 cut-off events. [2024-06-03 18:43:56,717 INFO L125 PetriNetUnfolderBase]: For 448090/448094 co-relation queries the response was YES. [2024-06-03 18:43:56,779 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41135 conditions, 6122 events. 3654/6122 cut-off events. For 448090/448094 co-relation queries the response was YES. Maximal size of possible extension queue 509. Compared 42158 event pairs, 892 based on Foata normal form. 12/6133 useless extension candidates. Maximal degree in co-relation 40935. Up to 5385 conditions per place. [2024-06-03 18:43:56,802 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 423 selfloop transitions, 91 changer transitions 0/520 dead transitions. [2024-06-03 18:43:56,802 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 470 places, 520 transitions, 7509 flow [2024-06-03 18:43:56,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 18:43:56,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 18:43:56,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 173 transitions. [2024-06-03 18:43:56,803 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5274390243902439 [2024-06-03 18:43:56,803 INFO L175 Difference]: Start difference. First operand has 463 places, 499 transitions, 6315 flow. Second operand 8 states and 173 transitions. [2024-06-03 18:43:56,803 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 470 places, 520 transitions, 7509 flow [2024-06-03 18:43:59,709 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 464 places, 520 transitions, 7316 flow, removed 9 selfloop flow, removed 6 redundant places. [2024-06-03 18:43:59,714 INFO L231 Difference]: Finished difference. Result has 465 places, 500 transitions, 6344 flow [2024-06-03 18:43:59,715 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6122, PETRI_DIFFERENCE_MINUEND_PLACES=457, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=499, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=90, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=408, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6344, PETRI_PLACES=465, PETRI_TRANSITIONS=500} [2024-06-03 18:43:59,715 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 423 predicate places. [2024-06-03 18:43:59,715 INFO L495 AbstractCegarLoop]: Abstraction has has 465 places, 500 transitions, 6344 flow [2024-06-03 18:43:59,715 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:43:59,715 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:43:59,715 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:43:59,715 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable184 [2024-06-03 18:43:59,715 INFO L420 AbstractCegarLoop]: === Iteration 186 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 18:43:59,715 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:43:59,715 INFO L85 PathProgramCache]: Analyzing trace with hash -827762871, now seen corresponding path program 7 times [2024-06-03 18:43:59,715 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:43:59,715 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [329368165] [2024-06-03 18:43:59,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:43:59,716 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:43:59,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:43:59,849 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:43:59,850 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:43:59,850 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [329368165] [2024-06-03 18:43:59,850 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [329368165] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:43:59,850 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:43:59,850 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 18:43:59,850 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [741580227] [2024-06-03 18:43:59,850 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:43:59,850 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 18:43:59,851 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:43:59,851 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 18:43:59,851 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-03 18:43:59,908 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 18:43:59,908 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 465 places, 500 transitions, 6344 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:43:59,908 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:43:59,908 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 18:43:59,908 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:44:01,211 INFO L124 PetriNetUnfolderBase]: 3715/6225 cut-off events. [2024-06-03 18:44:01,211 INFO L125 PetriNetUnfolderBase]: For 482928/482940 co-relation queries the response was YES. [2024-06-03 18:44:01,275 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42558 conditions, 6225 events. 3715/6225 cut-off events. For 482928/482940 co-relation queries the response was YES. Maximal size of possible extension queue 514. Compared 42956 event pairs, 799 based on Foata normal form. 18/6243 useless extension candidates. Maximal degree in co-relation 42357. Up to 5469 conditions per place. [2024-06-03 18:44:01,300 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 472 selfloop transitions, 59 changer transitions 0/537 dead transitions. [2024-06-03 18:44:01,300 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 473 places, 537 transitions, 7839 flow [2024-06-03 18:44:01,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 18:44:01,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 18:44:01,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 196 transitions. [2024-06-03 18:44:01,301 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5311653116531165 [2024-06-03 18:44:01,301 INFO L175 Difference]: Start difference. First operand has 465 places, 500 transitions, 6344 flow. Second operand 9 states and 196 transitions. [2024-06-03 18:44:01,301 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 473 places, 537 transitions, 7839 flow [2024-06-03 18:44:04,157 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 467 places, 537 transitions, 7639 flow, removed 10 selfloop flow, removed 6 redundant places. [2024-06-03 18:44:04,163 INFO L231 Difference]: Finished difference. Result has 468 places, 505 transitions, 6347 flow [2024-06-03 18:44:04,163 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6144, PETRI_DIFFERENCE_MINUEND_PLACES=459, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=500, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=445, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6347, PETRI_PLACES=468, PETRI_TRANSITIONS=505} [2024-06-03 18:44:04,163 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 426 predicate places. [2024-06-03 18:44:04,163 INFO L495 AbstractCegarLoop]: Abstraction has has 468 places, 505 transitions, 6347 flow [2024-06-03 18:44:04,163 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:44:04,163 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:44:04,164 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:44:04,164 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable185 [2024-06-03 18:44:04,164 INFO L420 AbstractCegarLoop]: === Iteration 187 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 18:44:04,164 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:44:04,164 INFO L85 PathProgramCache]: Analyzing trace with hash -473499831, now seen corresponding path program 8 times [2024-06-03 18:44:04,164 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:44:04,164 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [332755717] [2024-06-03 18:44:04,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:44:04,165 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:44:04,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:44:04,323 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:44:04,323 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:44:04,323 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [332755717] [2024-06-03 18:44:04,323 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [332755717] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:44:04,323 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:44:04,323 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 18:44:04,323 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [278143375] [2024-06-03 18:44:04,323 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:44:04,324 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 18:44:04,324 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:44:04,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 18:44:04,324 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-03 18:44:04,387 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 18:44:04,387 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 468 places, 505 transitions, 6347 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:44:04,387 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:44:04,387 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 18:44:04,388 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:44:05,837 INFO L124 PetriNetUnfolderBase]: 3735/6263 cut-off events. [2024-06-03 18:44:05,837 INFO L125 PetriNetUnfolderBase]: For 490036/490048 co-relation queries the response was YES. [2024-06-03 18:44:05,904 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42779 conditions, 6263 events. 3735/6263 cut-off events. For 490036/490048 co-relation queries the response was YES. Maximal size of possible extension queue 515. Compared 43310 event pairs, 804 based on Foata normal form. 18/6281 useless extension candidates. Maximal degree in co-relation 42577. Up to 5546 conditions per place. [2024-06-03 18:44:05,929 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 465 selfloop transitions, 59 changer transitions 0/530 dead transitions. [2024-06-03 18:44:05,929 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 475 places, 530 transitions, 7503 flow [2024-06-03 18:44:05,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 18:44:05,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 18:44:05,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 174 transitions. [2024-06-03 18:44:05,930 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5304878048780488 [2024-06-03 18:44:05,930 INFO L175 Difference]: Start difference. First operand has 468 places, 505 transitions, 6347 flow. Second operand 8 states and 174 transitions. [2024-06-03 18:44:05,930 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 475 places, 530 transitions, 7503 flow [2024-06-03 18:44:09,070 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 470 places, 530 transitions, 7344 flow, removed 31 selfloop flow, removed 5 redundant places. [2024-06-03 18:44:09,075 INFO L231 Difference]: Finished difference. Result has 471 places, 506 transitions, 6342 flow [2024-06-03 18:44:09,075 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6194, PETRI_DIFFERENCE_MINUEND_PLACES=463, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=505, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=446, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6342, PETRI_PLACES=471, PETRI_TRANSITIONS=506} [2024-06-03 18:44:09,076 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 429 predicate places. [2024-06-03 18:44:09,076 INFO L495 AbstractCegarLoop]: Abstraction has has 471 places, 506 transitions, 6342 flow [2024-06-03 18:44:09,076 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:44:09,076 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:44:09,076 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:44:09,076 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable186 [2024-06-03 18:44:09,076 INFO L420 AbstractCegarLoop]: === Iteration 188 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 18:44:09,076 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:44:09,076 INFO L85 PathProgramCache]: Analyzing trace with hash -473084121, now seen corresponding path program 9 times [2024-06-03 18:44:09,076 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:44:09,076 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2040302028] [2024-06-03 18:44:09,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:44:09,077 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:44:09,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:44:09,201 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:44:09,201 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:44:09,201 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2040302028] [2024-06-03 18:44:09,201 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2040302028] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:44:09,201 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:44:09,201 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 18:44:09,201 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1335711904] [2024-06-03 18:44:09,201 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:44:09,201 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 18:44:09,201 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:44:09,201 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 18:44:09,202 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-06-03 18:44:09,268 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 18:44:09,268 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 471 places, 506 transitions, 6342 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:44:09,268 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:44:09,268 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 18:44:09,268 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:44:10,675 INFO L124 PetriNetUnfolderBase]: 3788/6346 cut-off events. [2024-06-03 18:44:10,676 INFO L125 PetriNetUnfolderBase]: For 540701/540713 co-relation queries the response was YES. [2024-06-03 18:44:10,731 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43880 conditions, 6346 events. 3788/6346 cut-off events. For 540701/540713 co-relation queries the response was YES. Maximal size of possible extension queue 521. Compared 43915 event pairs, 869 based on Foata normal form. 18/6364 useless extension candidates. Maximal degree in co-relation 43679. Up to 4951 conditions per place. [2024-06-03 18:44:10,754 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 435 selfloop transitions, 97 changer transitions 0/538 dead transitions. [2024-06-03 18:44:10,754 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 478 places, 538 transitions, 7858 flow [2024-06-03 18:44:10,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 18:44:10,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 18:44:10,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 182 transitions. [2024-06-03 18:44:10,755 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5548780487804879 [2024-06-03 18:44:10,755 INFO L175 Difference]: Start difference. First operand has 471 places, 506 transitions, 6342 flow. Second operand 8 states and 182 transitions. [2024-06-03 18:44:10,755 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 478 places, 538 transitions, 7858 flow [2024-06-03 18:44:14,031 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 469 places, 538 transitions, 7699 flow, removed 13 selfloop flow, removed 9 redundant places. [2024-06-03 18:44:14,036 INFO L231 Difference]: Finished difference. Result has 470 places, 508 transitions, 6449 flow [2024-06-03 18:44:14,036 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6189, PETRI_DIFFERENCE_MINUEND_PLACES=462, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=506, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=96, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=410, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6449, PETRI_PLACES=470, PETRI_TRANSITIONS=508} [2024-06-03 18:44:14,037 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 428 predicate places. [2024-06-03 18:44:14,037 INFO L495 AbstractCegarLoop]: Abstraction has has 470 places, 508 transitions, 6449 flow [2024-06-03 18:44:14,037 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:44:14,037 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:44:14,037 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:44:14,037 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable187 [2024-06-03 18:44:14,037 INFO L420 AbstractCegarLoop]: === Iteration 189 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 18:44:14,037 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:44:14,037 INFO L85 PathProgramCache]: Analyzing trace with hash -1118631611, now seen corresponding path program 10 times [2024-06-03 18:44:14,037 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:44:14,037 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1801107943] [2024-06-03 18:44:14,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:44:14,037 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:44:14,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:44:14,166 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:44:14,166 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:44:14,166 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1801107943] [2024-06-03 18:44:14,166 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1801107943] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:44:14,166 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:44:14,166 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 18:44:14,166 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [244916250] [2024-06-03 18:44:14,166 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:44:14,167 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 18:44:14,167 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:44:14,167 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 18:44:14,167 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-03 18:44:14,207 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 18:44:14,208 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 470 places, 508 transitions, 6449 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:44:14,208 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:44:14,208 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 18:44:14,208 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:44:15,511 INFO L124 PetriNetUnfolderBase]: 3862/6460 cut-off events. [2024-06-03 18:44:15,511 INFO L125 PetriNetUnfolderBase]: For 600572/600584 co-relation queries the response was YES. [2024-06-03 18:44:15,576 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45842 conditions, 6460 events. 3862/6460 cut-off events. For 600572/600584 co-relation queries the response was YES. Maximal size of possible extension queue 531. Compared 44856 event pairs, 966 based on Foata normal form. 20/6480 useless extension candidates. Maximal degree in co-relation 45643. Up to 5711 conditions per place. [2024-06-03 18:44:15,601 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 454 selfloop transitions, 74 changer transitions 0/534 dead transitions. [2024-06-03 18:44:15,601 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 477 places, 534 transitions, 7939 flow [2024-06-03 18:44:15,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 18:44:15,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 18:44:15,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 177 transitions. [2024-06-03 18:44:15,602 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5396341463414634 [2024-06-03 18:44:15,602 INFO L175 Difference]: Start difference. First operand has 470 places, 508 transitions, 6449 flow. Second operand 8 states and 177 transitions. [2024-06-03 18:44:15,602 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 477 places, 534 transitions, 7939 flow [2024-06-03 18:44:19,130 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 473 places, 534 transitions, 7820 flow, removed 14 selfloop flow, removed 4 redundant places. [2024-06-03 18:44:19,136 INFO L231 Difference]: Finished difference. Result has 474 places, 510 transitions, 6548 flow [2024-06-03 18:44:19,136 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6330, PETRI_DIFFERENCE_MINUEND_PLACES=466, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=508, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=73, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=435, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6548, PETRI_PLACES=474, PETRI_TRANSITIONS=510} [2024-06-03 18:44:19,136 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 432 predicate places. [2024-06-03 18:44:19,136 INFO L495 AbstractCegarLoop]: Abstraction has has 474 places, 510 transitions, 6548 flow [2024-06-03 18:44:19,136 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:44:19,136 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:44:19,136 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:44:19,136 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable188 [2024-06-03 18:44:19,136 INFO L420 AbstractCegarLoop]: === Iteration 190 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 18:44:19,137 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:44:19,137 INFO L85 PathProgramCache]: Analyzing trace with hash -1261150391, now seen corresponding path program 11 times [2024-06-03 18:44:19,137 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:44:19,137 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [925751998] [2024-06-03 18:44:19,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:44:19,137 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:44:19,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:44:19,274 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:44:19,274 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:44:19,274 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [925751998] [2024-06-03 18:44:19,274 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [925751998] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:44:19,274 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:44:19,274 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 18:44:19,274 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1677468910] [2024-06-03 18:44:19,274 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:44:19,274 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 18:44:19,274 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:44:19,275 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 18:44:19,275 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-03 18:44:19,330 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 18:44:19,330 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 474 places, 510 transitions, 6548 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:44:19,330 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:44:19,330 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 18:44:19,330 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:44:20,588 INFO L124 PetriNetUnfolderBase]: 3882/6490 cut-off events. [2024-06-03 18:44:20,588 INFO L125 PetriNetUnfolderBase]: For 595406/595418 co-relation queries the response was YES. [2024-06-03 18:44:20,650 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46216 conditions, 6490 events. 3882/6490 cut-off events. For 595406/595418 co-relation queries the response was YES. Maximal size of possible extension queue 532. Compared 45077 event pairs, 970 based on Foata normal form. 18/6504 useless extension candidates. Maximal degree in co-relation 46015. Up to 5914 conditions per place. [2024-06-03 18:44:20,672 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 484 selfloop transitions, 41 changer transitions 0/531 dead transitions. [2024-06-03 18:44:20,672 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 481 places, 531 transitions, 7694 flow [2024-06-03 18:44:20,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 18:44:20,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 18:44:20,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 170 transitions. [2024-06-03 18:44:20,672 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5182926829268293 [2024-06-03 18:44:20,672 INFO L175 Difference]: Start difference. First operand has 474 places, 510 transitions, 6548 flow. Second operand 8 states and 170 transitions. [2024-06-03 18:44:20,672 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 481 places, 531 transitions, 7694 flow [2024-06-03 18:44:24,201 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 477 places, 531 transitions, 7590 flow, removed 11 selfloop flow, removed 4 redundant places. [2024-06-03 18:44:24,207 INFO L231 Difference]: Finished difference. Result has 478 places, 511 transitions, 6560 flow [2024-06-03 18:44:24,207 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6444, PETRI_DIFFERENCE_MINUEND_PLACES=470, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=510, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=469, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6560, PETRI_PLACES=478, PETRI_TRANSITIONS=511} [2024-06-03 18:44:24,207 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 436 predicate places. [2024-06-03 18:44:24,207 INFO L495 AbstractCegarLoop]: Abstraction has has 478 places, 511 transitions, 6560 flow [2024-06-03 18:44:24,207 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:44:24,207 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:44:24,207 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:44:24,207 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable189 [2024-06-03 18:44:24,207 INFO L420 AbstractCegarLoop]: === Iteration 191 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 18:44:24,208 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:44:24,208 INFO L85 PathProgramCache]: Analyzing trace with hash -1127202491, now seen corresponding path program 12 times [2024-06-03 18:44:24,208 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:44:24,208 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [648163439] [2024-06-03 18:44:24,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:44:24,208 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:44:24,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:44:24,339 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:44:24,340 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:44:24,340 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [648163439] [2024-06-03 18:44:24,340 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [648163439] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:44:24,340 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:44:24,340 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 18:44:24,340 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [101189164] [2024-06-03 18:44:24,340 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:44:24,340 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 18:44:24,340 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:44:24,340 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 18:44:24,340 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2024-06-03 18:44:24,382 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 18:44:24,382 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 478 places, 511 transitions, 6560 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:44:24,382 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:44:24,382 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 18:44:24,382 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:44:25,669 INFO L124 PetriNetUnfolderBase]: 3864/6470 cut-off events. [2024-06-03 18:44:25,669 INFO L125 PetriNetUnfolderBase]: For 559896/559908 co-relation queries the response was YES. [2024-06-03 18:44:25,730 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45068 conditions, 6470 events. 3864/6470 cut-off events. For 559896/559908 co-relation queries the response was YES. Maximal size of possible extension queue 532. Compared 44967 event pairs, 980 based on Foata normal form. 20/6490 useless extension candidates. Maximal degree in co-relation 44865. Up to 5843 conditions per place. [2024-06-03 18:44:25,750 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 452 selfloop transitions, 72 changer transitions 0/530 dead transitions. [2024-06-03 18:44:25,751 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 485 places, 530 transitions, 7692 flow [2024-06-03 18:44:25,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 18:44:25,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 18:44:25,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 173 transitions. [2024-06-03 18:44:25,751 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5274390243902439 [2024-06-03 18:44:25,751 INFO L175 Difference]: Start difference. First operand has 478 places, 511 transitions, 6560 flow. Second operand 8 states and 173 transitions. [2024-06-03 18:44:25,751 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 485 places, 530 transitions, 7692 flow [2024-06-03 18:44:29,409 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 479 places, 530 transitions, 7574 flow, removed 14 selfloop flow, removed 6 redundant places. [2024-06-03 18:44:29,425 INFO L231 Difference]: Finished difference. Result has 480 places, 511 transitions, 6591 flow [2024-06-03 18:44:29,426 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6442, PETRI_DIFFERENCE_MINUEND_PLACES=472, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=511, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=439, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6591, PETRI_PLACES=480, PETRI_TRANSITIONS=511} [2024-06-03 18:44:29,426 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 438 predicate places. [2024-06-03 18:44:29,426 INFO L495 AbstractCegarLoop]: Abstraction has has 480 places, 511 transitions, 6591 flow [2024-06-03 18:44:29,426 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:44:29,426 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:44:29,426 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:44:29,428 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable190 [2024-06-03 18:44:29,428 INFO L420 AbstractCegarLoop]: === Iteration 192 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 18:44:29,428 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:44:29,428 INFO L85 PathProgramCache]: Analyzing trace with hash -1260734681, now seen corresponding path program 13 times [2024-06-03 18:44:29,429 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:44:29,429 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [539499857] [2024-06-03 18:44:29,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:44:29,431 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:44:29,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:44:29,556 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:44:29,556 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:44:29,556 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [539499857] [2024-06-03 18:44:29,557 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [539499857] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:44:29,557 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:44:29,558 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 18:44:29,558 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1265040694] [2024-06-03 18:44:29,558 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:44:29,559 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 18:44:29,559 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:44:29,561 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 18:44:29,561 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-06-03 18:44:29,605 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 18:44:29,605 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 480 places, 511 transitions, 6591 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:44:29,605 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:44:29,605 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 18:44:29,605 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:44:31,062 INFO L124 PetriNetUnfolderBase]: 3884/6504 cut-off events. [2024-06-03 18:44:31,062 INFO L125 PetriNetUnfolderBase]: For 553515/553527 co-relation queries the response was YES. [2024-06-03 18:44:31,113 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45305 conditions, 6504 events. 3884/6504 cut-off events. For 553515/553527 co-relation queries the response was YES. Maximal size of possible extension queue 537. Compared 45342 event pairs, 952 based on Foata normal form. 18/6522 useless extension candidates. Maximal degree in co-relation 45101. Up to 5643 conditions per place. [2024-06-03 18:44:31,133 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 451 selfloop transitions, 80 changer transitions 0/537 dead transitions. [2024-06-03 18:44:31,133 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 487 places, 537 transitions, 7827 flow [2024-06-03 18:44:31,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 18:44:31,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 18:44:31,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 178 transitions. [2024-06-03 18:44:31,134 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5426829268292683 [2024-06-03 18:44:31,134 INFO L175 Difference]: Start difference. First operand has 480 places, 511 transitions, 6591 flow. Second operand 8 states and 178 transitions. [2024-06-03 18:44:31,134 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 487 places, 537 transitions, 7827 flow [2024-06-03 18:44:34,655 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 480 places, 537 transitions, 7675 flow, removed 1 selfloop flow, removed 7 redundant places. [2024-06-03 18:44:34,661 INFO L231 Difference]: Finished difference. Result has 481 places, 512 transitions, 6639 flow [2024-06-03 18:44:34,661 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6439, PETRI_DIFFERENCE_MINUEND_PLACES=473, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=511, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=79, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=431, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6639, PETRI_PLACES=481, PETRI_TRANSITIONS=512} [2024-06-03 18:44:34,661 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 439 predicate places. [2024-06-03 18:44:34,661 INFO L495 AbstractCegarLoop]: Abstraction has has 481 places, 512 transitions, 6639 flow [2024-06-03 18:44:34,661 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:44:34,661 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:44:34,661 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:44:34,661 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable191 [2024-06-03 18:44:34,662 INFO L420 AbstractCegarLoop]: === Iteration 193 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 18:44:34,662 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:44:34,662 INFO L85 PathProgramCache]: Analyzing trace with hash 1224323529, now seen corresponding path program 14 times [2024-06-03 18:44:34,662 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:44:34,662 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [732346450] [2024-06-03 18:44:34,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:44:34,662 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:44:34,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:44:34,792 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:44:34,792 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:44:34,793 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [732346450] [2024-06-03 18:44:34,793 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [732346450] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:44:34,793 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:44:34,793 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 18:44:34,793 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1931722929] [2024-06-03 18:44:34,793 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:44:34,793 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 18:44:34,793 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:44:34,794 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 18:44:34,794 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-03 18:44:34,841 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 18:44:34,842 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 481 places, 512 transitions, 6639 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:44:34,842 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:44:34,842 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 18:44:34,842 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:44:36,196 INFO L124 PetriNetUnfolderBase]: 3904/6538 cut-off events. [2024-06-03 18:44:36,196 INFO L125 PetriNetUnfolderBase]: For 562164/562176 co-relation queries the response was YES. [2024-06-03 18:44:36,260 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45798 conditions, 6538 events. 3904/6538 cut-off events. For 562164/562176 co-relation queries the response was YES. Maximal size of possible extension queue 539. Compared 45534 event pairs, 978 based on Foata normal form. 18/6556 useless extension candidates. Maximal degree in co-relation 45593. Up to 5905 conditions per place. [2024-06-03 18:44:36,284 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 497 selfloop transitions, 39 changer transitions 0/542 dead transitions. [2024-06-03 18:44:36,284 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 488 places, 542 transitions, 8123 flow [2024-06-03 18:44:36,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 18:44:36,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 18:44:36,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 180 transitions. [2024-06-03 18:44:36,285 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5487804878048781 [2024-06-03 18:44:36,285 INFO L175 Difference]: Start difference. First operand has 481 places, 512 transitions, 6639 flow. Second operand 8 states and 180 transitions. [2024-06-03 18:44:36,285 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 488 places, 542 transitions, 8123 flow [2024-06-03 18:44:39,683 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 482 places, 542 transitions, 7941 flow, removed 12 selfloop flow, removed 6 redundant places. [2024-06-03 18:44:39,689 INFO L231 Difference]: Finished difference. Result has 483 places, 513 transitions, 6577 flow [2024-06-03 18:44:39,689 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6457, PETRI_DIFFERENCE_MINUEND_PLACES=475, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=512, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=474, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6577, PETRI_PLACES=483, PETRI_TRANSITIONS=513} [2024-06-03 18:44:39,689 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 441 predicate places. [2024-06-03 18:44:39,689 INFO L495 AbstractCegarLoop]: Abstraction has has 483 places, 513 transitions, 6577 flow [2024-06-03 18:44:39,690 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:44:39,690 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:44:39,690 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:44:39,690 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable192 [2024-06-03 18:44:39,690 INFO L420 AbstractCegarLoop]: === Iteration 194 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 18:44:39,690 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:44:39,690 INFO L85 PathProgramCache]: Analyzing trace with hash 1224471399, now seen corresponding path program 15 times [2024-06-03 18:44:39,690 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:44:39,691 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1588473566] [2024-06-03 18:44:39,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:44:39,691 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:44:39,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:44:39,823 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:44:39,824 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:44:39,824 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1588473566] [2024-06-03 18:44:39,824 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1588473566] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:44:39,824 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:44:39,824 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 18:44:39,824 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [166387302] [2024-06-03 18:44:39,824 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:44:39,824 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 18:44:39,825 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:44:39,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 18:44:39,825 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-03 18:44:39,882 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 18:44:39,882 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 483 places, 513 transitions, 6577 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:44:39,882 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:44:39,882 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 18:44:39,882 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:44:41,221 INFO L124 PetriNetUnfolderBase]: 3886/6512 cut-off events. [2024-06-03 18:44:41,222 INFO L125 PetriNetUnfolderBase]: For 524916/524928 co-relation queries the response was YES. [2024-06-03 18:44:41,285 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44388 conditions, 6512 events. 3886/6512 cut-off events. For 524916/524928 co-relation queries the response was YES. Maximal size of possible extension queue 539. Compared 45403 event pairs, 976 based on Foata normal form. 20/6532 useless extension candidates. Maximal degree in co-relation 44182. Up to 5945 conditions per place. [2024-06-03 18:44:41,307 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 494 selfloop transitions, 34 changer transitions 0/534 dead transitions. [2024-06-03 18:44:41,307 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 489 places, 534 transitions, 7723 flow [2024-06-03 18:44:41,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 18:44:41,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 18:44:41,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 156 transitions. [2024-06-03 18:44:41,307 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5435540069686411 [2024-06-03 18:44:41,307 INFO L175 Difference]: Start difference. First operand has 483 places, 513 transitions, 6577 flow. Second operand 7 states and 156 transitions. [2024-06-03 18:44:41,307 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 489 places, 534 transitions, 7723 flow [2024-06-03 18:44:44,793 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 482 places, 534 transitions, 7535 flow, removed 27 selfloop flow, removed 7 redundant places. [2024-06-03 18:44:44,799 INFO L231 Difference]: Finished difference. Result has 483 places, 513 transitions, 6462 flow [2024-06-03 18:44:44,799 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6389, PETRI_DIFFERENCE_MINUEND_PLACES=476, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=513, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=479, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6462, PETRI_PLACES=483, PETRI_TRANSITIONS=513} [2024-06-03 18:44:44,799 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 441 predicate places. [2024-06-03 18:44:44,799 INFO L495 AbstractCegarLoop]: Abstraction has has 483 places, 513 transitions, 6462 flow [2024-06-03 18:44:44,799 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:44:44,799 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:44:44,799 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:44:44,800 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable193 [2024-06-03 18:44:44,800 INFO L420 AbstractCegarLoop]: === Iteration 195 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 18:44:44,800 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:44:44,800 INFO L85 PathProgramCache]: Analyzing trace with hash 1490020809, now seen corresponding path program 16 times [2024-06-03 18:44:44,800 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:44:44,800 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1759935963] [2024-06-03 18:44:44,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:44:44,800 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:44:44,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:44:44,950 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:44:44,950 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:44:44,950 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1759935963] [2024-06-03 18:44:44,950 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1759935963] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:44:44,950 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:44:44,950 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 18:44:44,951 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2074863565] [2024-06-03 18:44:44,951 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:44:44,951 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 18:44:44,951 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:44:44,951 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 18:44:44,951 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-03 18:44:45,008 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 18:44:45,008 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 483 places, 513 transitions, 6462 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:44:45,008 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:44:45,008 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 18:44:45,008 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:44:46,343 INFO L124 PetriNetUnfolderBase]: 3873/6493 cut-off events. [2024-06-03 18:44:46,343 INFO L125 PetriNetUnfolderBase]: For 465495/465507 co-relation queries the response was YES. [2024-06-03 18:44:46,405 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43062 conditions, 6493 events. 3873/6493 cut-off events. For 465495/465507 co-relation queries the response was YES. Maximal size of possible extension queue 539. Compared 45249 event pairs, 867 based on Foata normal form. 18/6511 useless extension candidates. Maximal degree in co-relation 42856. Up to 5834 conditions per place. [2024-06-03 18:44:46,426 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 487 selfloop transitions, 45 changer transitions 0/538 dead transitions. [2024-06-03 18:44:46,426 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 489 places, 538 transitions, 7608 flow [2024-06-03 18:44:46,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 18:44:46,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 18:44:46,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 160 transitions. [2024-06-03 18:44:46,426 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5574912891986062 [2024-06-03 18:44:46,427 INFO L175 Difference]: Start difference. First operand has 483 places, 513 transitions, 6462 flow. Second operand 7 states and 160 transitions. [2024-06-03 18:44:46,427 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 489 places, 538 transitions, 7608 flow [2024-06-03 18:44:49,592 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 484 places, 538 transitions, 7525 flow, removed 9 selfloop flow, removed 5 redundant places. [2024-06-03 18:44:49,598 INFO L231 Difference]: Finished difference. Result has 485 places, 513 transitions, 6473 flow [2024-06-03 18:44:49,598 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6379, PETRI_DIFFERENCE_MINUEND_PLACES=478, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=513, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=468, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6473, PETRI_PLACES=485, PETRI_TRANSITIONS=513} [2024-06-03 18:44:49,598 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 443 predicate places. [2024-06-03 18:44:49,598 INFO L495 AbstractCegarLoop]: Abstraction has has 485 places, 513 transitions, 6473 flow [2024-06-03 18:44:49,598 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:44:49,598 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:44:49,598 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:44:49,598 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable194 [2024-06-03 18:44:49,598 INFO L420 AbstractCegarLoop]: === Iteration 196 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 18:44:49,598 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:44:49,598 INFO L85 PathProgramCache]: Analyzing trace with hash 1623968709, now seen corresponding path program 17 times [2024-06-03 18:44:49,598 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:44:49,599 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1063832135] [2024-06-03 18:44:49,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:44:49,599 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:44:49,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:44:49,733 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:44:49,733 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:44:49,733 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1063832135] [2024-06-03 18:44:49,733 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1063832135] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:44:49,733 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:44:49,733 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 18:44:49,733 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1650794683] [2024-06-03 18:44:49,733 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:44:49,733 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 18:44:49,733 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:44:49,733 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 18:44:49,733 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-03 18:44:49,771 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 18:44:49,771 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 485 places, 513 transitions, 6473 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:44:49,771 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:44:49,771 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 18:44:49,771 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:44:51,239 INFO L124 PetriNetUnfolderBase]: 3901/6537 cut-off events. [2024-06-03 18:44:51,240 INFO L125 PetriNetUnfolderBase]: For 489893/489905 co-relation queries the response was YES. [2024-06-03 18:44:51,294 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43520 conditions, 6537 events. 3901/6537 cut-off events. For 489893/489905 co-relation queries the response was YES. Maximal size of possible extension queue 544. Compared 45656 event pairs, 991 based on Foata normal form. 20/6557 useless extension candidates. Maximal degree in co-relation 43313. Up to 5925 conditions per place. [2024-06-03 18:44:51,315 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 464 selfloop transitions, 62 changer transitions 0/532 dead transitions. [2024-06-03 18:44:51,316 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 491 places, 532 transitions, 7643 flow [2024-06-03 18:44:51,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 18:44:51,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 18:44:51,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 155 transitions. [2024-06-03 18:44:51,316 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5400696864111498 [2024-06-03 18:44:51,316 INFO L175 Difference]: Start difference. First operand has 485 places, 513 transitions, 6473 flow. Second operand 7 states and 155 transitions. [2024-06-03 18:44:51,316 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 491 places, 532 transitions, 7643 flow [2024-06-03 18:44:54,511 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 483 places, 532 transitions, 7467 flow, removed 4 selfloop flow, removed 8 redundant places. [2024-06-03 18:44:54,517 INFO L231 Difference]: Finished difference. Result has 484 places, 514 transitions, 6464 flow [2024-06-03 18:44:54,517 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6299, PETRI_DIFFERENCE_MINUEND_PLACES=477, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=513, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=451, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6464, PETRI_PLACES=484, PETRI_TRANSITIONS=514} [2024-06-03 18:44:54,517 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 442 predicate places. [2024-06-03 18:44:54,517 INFO L495 AbstractCegarLoop]: Abstraction has has 484 places, 514 transitions, 6464 flow [2024-06-03 18:44:54,517 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:44:54,517 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:44:54,517 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:44:54,517 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable195 [2024-06-03 18:44:54,517 INFO L420 AbstractCegarLoop]: === Iteration 197 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 18:44:54,518 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:44:54,518 INFO L85 PathProgramCache]: Analyzing trace with hash 1632539589, now seen corresponding path program 18 times [2024-06-03 18:44:54,518 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:44:54,518 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [305018527] [2024-06-03 18:44:54,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:44:54,518 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:44:54,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:44:54,650 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:44:54,651 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:44:54,651 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [305018527] [2024-06-03 18:44:54,651 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [305018527] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:44:54,651 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:44:54,651 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 18:44:54,651 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1399737484] [2024-06-03 18:44:54,651 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:44:54,651 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 18:44:54,651 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:44:54,651 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 18:44:54,651 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-03 18:44:54,707 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 18:44:54,707 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 484 places, 514 transitions, 6464 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:44:54,707 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:44:54,707 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 18:44:54,707 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:44:56,079 INFO L124 PetriNetUnfolderBase]: 3929/6581 cut-off events. [2024-06-03 18:44:56,079 INFO L125 PetriNetUnfolderBase]: For 498897/498909 co-relation queries the response was YES. [2024-06-03 18:44:56,146 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43764 conditions, 6581 events. 3929/6581 cut-off events. For 498897/498909 co-relation queries the response was YES. Maximal size of possible extension queue 551. Compared 45959 event pairs, 979 based on Foata normal form. 20/6601 useless extension candidates. Maximal degree in co-relation 43557. Up to 5829 conditions per place. [2024-06-03 18:44:56,171 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 466 selfloop transitions, 65 changer transitions 0/537 dead transitions. [2024-06-03 18:44:56,171 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 490 places, 537 transitions, 7692 flow [2024-06-03 18:44:56,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 18:44:56,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 18:44:56,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 158 transitions. [2024-06-03 18:44:56,171 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5505226480836237 [2024-06-03 18:44:56,172 INFO L175 Difference]: Start difference. First operand has 484 places, 514 transitions, 6464 flow. Second operand 7 states and 158 transitions. [2024-06-03 18:44:56,172 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 490 places, 537 transitions, 7692 flow [2024-06-03 18:44:59,878 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 485 places, 537 transitions, 7551 flow, removed 10 selfloop flow, removed 5 redundant places. [2024-06-03 18:44:59,883 INFO L231 Difference]: Finished difference. Result has 486 places, 515 transitions, 6495 flow [2024-06-03 18:44:59,883 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6323, PETRI_DIFFERENCE_MINUEND_PLACES=479, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=514, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=449, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6495, PETRI_PLACES=486, PETRI_TRANSITIONS=515} [2024-06-03 18:44:59,883 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 444 predicate places. [2024-06-03 18:44:59,884 INFO L495 AbstractCegarLoop]: Abstraction has has 486 places, 515 transitions, 6495 flow [2024-06-03 18:44:59,884 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:44:59,884 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:44:59,884 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:44:59,884 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable196 [2024-06-03 18:44:59,884 INFO L420 AbstractCegarLoop]: === Iteration 198 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 18:44:59,884 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:44:59,884 INFO L85 PathProgramCache]: Analyzing trace with hash -2040619853, now seen corresponding path program 19 times [2024-06-03 18:44:59,884 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:44:59,884 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1272256742] [2024-06-03 18:44:59,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:44:59,884 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:44:59,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:45:00,020 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:45:00,020 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:45:00,020 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1272256742] [2024-06-03 18:45:00,020 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1272256742] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:45:00,020 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:45:00,020 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 18:45:00,021 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1475751680] [2024-06-03 18:45:00,021 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:45:00,021 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 18:45:00,021 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:45:00,021 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 18:45:00,021 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-03 18:45:00,078 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 18:45:00,078 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 486 places, 515 transitions, 6495 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:45:00,078 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:45:00,078 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 18:45:00,078 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:45:01,503 INFO L124 PetriNetUnfolderBase]: 3957/6625 cut-off events. [2024-06-03 18:45:01,503 INFO L125 PetriNetUnfolderBase]: For 507949/507961 co-relation queries the response was YES. [2024-06-03 18:45:01,572 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44213 conditions, 6625 events. 3957/6625 cut-off events. For 507949/507961 co-relation queries the response was YES. Maximal size of possible extension queue 556. Compared 46373 event pairs, 993 based on Foata normal form. 20/6645 useless extension candidates. Maximal degree in co-relation 44005. Up to 6013 conditions per place. [2024-06-03 18:45:01,599 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 462 selfloop transitions, 69 changer transitions 0/537 dead transitions. [2024-06-03 18:45:01,599 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 495 places, 537 transitions, 7683 flow [2024-06-03 18:45:01,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 18:45:01,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 18:45:01,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 207 transitions. [2024-06-03 18:45:01,599 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5048780487804878 [2024-06-03 18:45:01,600 INFO L175 Difference]: Start difference. First operand has 486 places, 515 transitions, 6495 flow. Second operand 10 states and 207 transitions. [2024-06-03 18:45:01,600 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 495 places, 537 transitions, 7683 flow [2024-06-03 18:45:05,193 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 490 places, 537 transitions, 7533 flow, removed 11 selfloop flow, removed 5 redundant places. [2024-06-03 18:45:05,198 INFO L231 Difference]: Finished difference. Result has 491 places, 516 transitions, 6528 flow [2024-06-03 18:45:05,199 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6345, PETRI_DIFFERENCE_MINUEND_PLACES=481, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=515, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=446, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6528, PETRI_PLACES=491, PETRI_TRANSITIONS=516} [2024-06-03 18:45:05,199 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 449 predicate places. [2024-06-03 18:45:05,199 INFO L495 AbstractCegarLoop]: Abstraction has has 491 places, 516 transitions, 6528 flow [2024-06-03 18:45:05,199 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:45:05,199 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:45:05,199 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:45:05,199 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable197 [2024-06-03 18:45:05,199 INFO L420 AbstractCegarLoop]: === Iteration 199 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 18:45:05,199 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:45:05,199 INFO L85 PathProgramCache]: Analyzing trace with hash -1173705275, now seen corresponding path program 20 times [2024-06-03 18:45:05,199 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:45:05,199 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [557717435] [2024-06-03 18:45:05,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:45:05,200 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:45:05,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:45:05,339 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:45:05,339 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:45:05,339 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [557717435] [2024-06-03 18:45:05,339 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [557717435] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:45:05,339 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:45:05,340 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 18:45:05,340 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1338729656] [2024-06-03 18:45:05,340 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:45:05,340 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 18:45:05,340 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:45:05,340 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 18:45:05,340 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-03 18:45:05,382 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 18:45:05,383 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 491 places, 516 transitions, 6528 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:45:05,383 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:45:05,383 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 18:45:05,383 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:45:06,853 INFO L124 PetriNetUnfolderBase]: 3985/6669 cut-off events. [2024-06-03 18:45:06,853 INFO L125 PetriNetUnfolderBase]: For 515527/515539 co-relation queries the response was YES. [2024-06-03 18:45:06,920 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44564 conditions, 6669 events. 3985/6669 cut-off events. For 515527/515539 co-relation queries the response was YES. Maximal size of possible extension queue 561. Compared 46743 event pairs, 1009 based on Foata normal form. 20/6689 useless extension candidates. Maximal degree in co-relation 44355. Up to 6057 conditions per place. [2024-06-03 18:45:06,944 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 465 selfloop transitions, 66 changer transitions 0/537 dead transitions. [2024-06-03 18:45:06,944 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 499 places, 537 transitions, 7716 flow [2024-06-03 18:45:06,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 18:45:06,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 18:45:06,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 190 transitions. [2024-06-03 18:45:06,945 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5149051490514905 [2024-06-03 18:45:06,945 INFO L175 Difference]: Start difference. First operand has 491 places, 516 transitions, 6528 flow. Second operand 9 states and 190 transitions. [2024-06-03 18:45:06,945 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 499 places, 537 transitions, 7716 flow [2024-06-03 18:45:10,280 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 491 places, 537 transitions, 7557 flow, removed 12 selfloop flow, removed 8 redundant places. [2024-06-03 18:45:10,286 INFO L231 Difference]: Finished difference. Result has 492 places, 517 transitions, 6548 flow [2024-06-03 18:45:10,286 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6369, PETRI_DIFFERENCE_MINUEND_PLACES=483, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=516, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=450, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6548, PETRI_PLACES=492, PETRI_TRANSITIONS=517} [2024-06-03 18:45:10,287 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 450 predicate places. [2024-06-03 18:45:10,287 INFO L495 AbstractCegarLoop]: Abstraction has has 492 places, 517 transitions, 6548 flow [2024-06-03 18:45:10,287 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:45:10,287 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:45:10,287 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:45:10,287 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable198 [2024-06-03 18:45:10,287 INFO L420 AbstractCegarLoop]: === Iteration 200 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 18:45:10,288 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:45:10,288 INFO L85 PathProgramCache]: Analyzing trace with hash -2034124733, now seen corresponding path program 21 times [2024-06-03 18:45:10,288 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:45:10,288 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [789465890] [2024-06-03 18:45:10,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:45:10,288 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:45:10,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:45:10,410 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:45:10,410 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:45:10,410 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [789465890] [2024-06-03 18:45:10,411 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [789465890] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:45:10,411 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:45:10,411 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 18:45:10,411 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [4672352] [2024-06-03 18:45:10,411 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:45:10,411 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 18:45:10,411 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:45:10,411 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 18:45:10,412 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-03 18:45:10,458 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 18:45:10,459 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 492 places, 517 transitions, 6548 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:45:10,459 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:45:10,459 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 18:45:10,459 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:45:11,999 INFO L124 PetriNetUnfolderBase]: 4000/6694 cut-off events. [2024-06-03 18:45:11,999 INFO L125 PetriNetUnfolderBase]: For 505807/505819 co-relation queries the response was YES. [2024-06-03 18:45:12,059 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44475 conditions, 6694 events. 4000/6694 cut-off events. For 505807/505819 co-relation queries the response was YES. Maximal size of possible extension queue 565. Compared 46966 event pairs, 1006 based on Foata normal form. 20/6714 useless extension candidates. Maximal degree in co-relation 44265. Up to 5942 conditions per place. [2024-06-03 18:45:12,083 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 467 selfloop transitions, 69 changer transitions 0/542 dead transitions. [2024-06-03 18:45:12,083 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 500 places, 542 transitions, 7796 flow [2024-06-03 18:45:12,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 18:45:12,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 18:45:12,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 193 transitions. [2024-06-03 18:45:12,084 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5230352303523035 [2024-06-03 18:45:12,084 INFO L175 Difference]: Start difference. First operand has 492 places, 517 transitions, 6548 flow. Second operand 9 states and 193 transitions. [2024-06-03 18:45:12,084 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 500 places, 542 transitions, 7796 flow [2024-06-03 18:45:15,564 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 493 places, 542 transitions, 7641 flow, removed 13 selfloop flow, removed 7 redundant places. [2024-06-03 18:45:15,570 INFO L231 Difference]: Finished difference. Result has 494 places, 518 transitions, 6579 flow [2024-06-03 18:45:15,570 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6393, PETRI_DIFFERENCE_MINUEND_PLACES=485, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=517, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=448, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6579, PETRI_PLACES=494, PETRI_TRANSITIONS=518} [2024-06-03 18:45:15,570 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 452 predicate places. [2024-06-03 18:45:15,571 INFO L495 AbstractCegarLoop]: Abstraction has has 494 places, 518 transitions, 6579 flow [2024-06-03 18:45:15,571 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:45:15,571 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:45:15,571 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:45:15,571 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable199 [2024-06-03 18:45:15,571 INFO L420 AbstractCegarLoop]: === Iteration 201 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 18:45:15,571 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:45:15,571 INFO L85 PathProgramCache]: Analyzing trace with hash 1490436519, now seen corresponding path program 22 times [2024-06-03 18:45:15,571 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:45:15,571 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1150949539] [2024-06-03 18:45:15,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:45:15,571 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:45:15,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:45:15,702 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:45:15,702 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:45:15,702 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1150949539] [2024-06-03 18:45:15,702 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1150949539] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:45:15,702 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:45:15,702 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 18:45:15,702 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [455630788] [2024-06-03 18:45:15,702 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:45:15,702 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 18:45:15,703 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:45:15,703 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 18:45:15,703 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-03 18:45:15,751 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 18:45:15,752 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 494 places, 518 transitions, 6579 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:45:15,752 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:45:15,752 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 18:45:15,752 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:45:17,160 INFO L124 PetriNetUnfolderBase]: 3987/6675 cut-off events. [2024-06-03 18:45:17,160 INFO L125 PetriNetUnfolderBase]: For 443755/443767 co-relation queries the response was YES. [2024-06-03 18:45:17,232 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43446 conditions, 6675 events. 3987/6675 cut-off events. For 443755/443767 co-relation queries the response was YES. Maximal size of possible extension queue 565. Compared 46804 event pairs, 912 based on Foata normal form. 18/6693 useless extension candidates. Maximal degree in co-relation 43235. Up to 5520 conditions per place. [2024-06-03 18:45:17,260 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 455 selfloop transitions, 84 changer transitions 0/545 dead transitions. [2024-06-03 18:45:17,260 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 500 places, 545 transitions, 7803 flow [2024-06-03 18:45:17,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 18:45:17,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 18:45:17,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 163 transitions. [2024-06-03 18:45:17,261 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5679442508710801 [2024-06-03 18:45:17,261 INFO L175 Difference]: Start difference. First operand has 494 places, 518 transitions, 6579 flow. Second operand 7 states and 163 transitions. [2024-06-03 18:45:17,261 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 500 places, 545 transitions, 7803 flow [2024-06-03 18:45:20,671 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 493 places, 545 transitions, 7629 flow, removed 19 selfloop flow, removed 7 redundant places. [2024-06-03 18:45:20,676 INFO L231 Difference]: Finished difference. Result has 494 places, 518 transitions, 6577 flow [2024-06-03 18:45:20,677 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6405, PETRI_DIFFERENCE_MINUEND_PLACES=487, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=518, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=84, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=434, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6577, PETRI_PLACES=494, PETRI_TRANSITIONS=518} [2024-06-03 18:45:20,677 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 452 predicate places. [2024-06-03 18:45:20,677 INFO L495 AbstractCegarLoop]: Abstraction has has 494 places, 518 transitions, 6577 flow [2024-06-03 18:45:20,677 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:45:20,677 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:45:20,677 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:45:20,678 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable200 [2024-06-03 18:45:20,678 INFO L420 AbstractCegarLoop]: === Iteration 202 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 18:45:20,678 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:45:20,678 INFO L85 PathProgramCache]: Analyzing trace with hash -2040404837, now seen corresponding path program 4 times [2024-06-03 18:45:20,678 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:45:20,678 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [638941394] [2024-06-03 18:45:20,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:45:20,678 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:45:20,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:45:20,810 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:45:20,810 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:45:20,810 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [638941394] [2024-06-03 18:45:20,810 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [638941394] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:45:20,810 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:45:20,810 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 18:45:20,810 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1089440499] [2024-06-03 18:45:20,810 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:45:20,811 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 18:45:20,811 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:45:20,811 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 18:45:20,811 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-03 18:45:20,865 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 18:45:20,865 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 494 places, 518 transitions, 6577 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:45:20,865 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:45:20,865 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 18:45:20,865 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:45:22,354 INFO L124 PetriNetUnfolderBase]: 4015/6721 cut-off events. [2024-06-03 18:45:22,354 INFO L125 PetriNetUnfolderBase]: For 448155/448167 co-relation queries the response was YES. [2024-06-03 18:45:22,428 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43747 conditions, 6721 events. 4015/6721 cut-off events. For 448155/448167 co-relation queries the response was YES. Maximal size of possible extension queue 569. Compared 47178 event pairs, 995 based on Foata normal form. 18/6739 useless extension candidates. Maximal degree in co-relation 43535. Up to 6015 conditions per place. [2024-06-03 18:45:22,454 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 466 selfloop transitions, 76 changer transitions 0/548 dead transitions. [2024-06-03 18:45:22,454 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 503 places, 548 transitions, 7835 flow [2024-06-03 18:45:22,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 18:45:22,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 18:45:22,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 215 transitions. [2024-06-03 18:45:22,455 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.524390243902439 [2024-06-03 18:45:22,455 INFO L175 Difference]: Start difference. First operand has 494 places, 518 transitions, 6577 flow. Second operand 10 states and 215 transitions. [2024-06-03 18:45:22,455 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 503 places, 548 transitions, 7835 flow [2024-06-03 18:45:25,796 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 494 places, 548 transitions, 7441 flow, removed 12 selfloop flow, removed 9 redundant places. [2024-06-03 18:45:25,802 INFO L231 Difference]: Finished difference. Result has 496 places, 521 transitions, 6405 flow [2024-06-03 18:45:25,802 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6183, PETRI_DIFFERENCE_MINUEND_PLACES=485, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=518, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=73, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=442, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6405, PETRI_PLACES=496, PETRI_TRANSITIONS=521} [2024-06-03 18:45:25,802 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 454 predicate places. [2024-06-03 18:45:25,802 INFO L495 AbstractCegarLoop]: Abstraction has has 496 places, 521 transitions, 6405 flow [2024-06-03 18:45:25,802 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:45:25,802 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:45:25,802 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:45:25,802 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable201 [2024-06-03 18:45:25,803 INFO L420 AbstractCegarLoop]: === Iteration 203 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 18:45:25,803 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:45:25,803 INFO L85 PathProgramCache]: Analyzing trace with hash -1612307981, now seen corresponding path program 2 times [2024-06-03 18:45:25,803 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:45:25,803 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [106568959] [2024-06-03 18:45:25,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:45:25,803 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:45:25,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:45:25,940 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:45:25,941 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:45:25,941 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [106568959] [2024-06-03 18:45:25,941 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [106568959] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:45:25,941 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:45:25,941 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 18:45:25,941 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [545897510] [2024-06-03 18:45:25,941 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:45:25,941 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 18:45:25,941 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:45:25,941 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 18:45:25,941 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-03 18:45:25,993 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 18:45:25,993 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 496 places, 521 transitions, 6405 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:45:25,993 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:45:25,993 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 18:45:25,993 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:45:27,468 INFO L124 PetriNetUnfolderBase]: 4035/6751 cut-off events. [2024-06-03 18:45:27,468 INFO L125 PetriNetUnfolderBase]: For 451771/451783 co-relation queries the response was YES. [2024-06-03 18:45:27,538 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43075 conditions, 6751 events. 4035/6751 cut-off events. For 451771/451783 co-relation queries the response was YES. Maximal size of possible extension queue 571. Compared 47352 event pairs, 1027 based on Foata normal form. 18/6769 useless extension candidates. Maximal degree in co-relation 42864. Up to 6027 conditions per place. [2024-06-03 18:45:27,564 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 463 selfloop transitions, 77 changer transitions 0/546 dead transitions. [2024-06-03 18:45:27,564 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 505 places, 546 transitions, 7623 flow [2024-06-03 18:45:27,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 18:45:27,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 18:45:27,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 210 transitions. [2024-06-03 18:45:27,573 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5121951219512195 [2024-06-03 18:45:27,573 INFO L175 Difference]: Start difference. First operand has 496 places, 521 transitions, 6405 flow. Second operand 10 states and 210 transitions. [2024-06-03 18:45:27,573 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 505 places, 546 transitions, 7623 flow [2024-06-03 18:45:31,152 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 497 places, 546 transitions, 7455 flow, removed 15 selfloop flow, removed 8 redundant places. [2024-06-03 18:45:31,158 INFO L231 Difference]: Finished difference. Result has 498 places, 522 transitions, 6424 flow [2024-06-03 18:45:31,158 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6237, PETRI_DIFFERENCE_MINUEND_PLACES=488, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=521, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=444, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6424, PETRI_PLACES=498, PETRI_TRANSITIONS=522} [2024-06-03 18:45:31,158 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 456 predicate places. [2024-06-03 18:45:31,158 INFO L495 AbstractCegarLoop]: Abstraction has has 498 places, 522 transitions, 6424 flow [2024-06-03 18:45:31,158 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:45:31,158 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:45:31,159 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:45:31,159 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable202 [2024-06-03 18:45:31,159 INFO L420 AbstractCegarLoop]: === Iteration 204 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 18:45:31,159 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:45:31,159 INFO L85 PathProgramCache]: Analyzing trace with hash -1597569341, now seen corresponding path program 3 times [2024-06-03 18:45:31,159 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:45:31,159 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1597169495] [2024-06-03 18:45:31,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:45:31,159 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:45:31,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:45:31,291 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:45:31,291 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:45:31,291 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1597169495] [2024-06-03 18:45:31,291 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1597169495] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:45:31,291 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:45:31,291 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 18:45:31,291 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [160456105] [2024-06-03 18:45:31,291 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:45:31,291 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 18:45:31,292 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:45:31,292 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 18:45:31,292 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-03 18:45:31,346 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 18:45:31,346 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 498 places, 522 transitions, 6424 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:45:31,346 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:45:31,346 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 18:45:31,346 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:45:32,886 INFO L124 PetriNetUnfolderBase]: 4055/6791 cut-off events. [2024-06-03 18:45:32,887 INFO L125 PetriNetUnfolderBase]: For 451867/451879 co-relation queries the response was YES. [2024-06-03 18:45:32,950 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43225 conditions, 6791 events. 4055/6791 cut-off events. For 451867/451879 co-relation queries the response was YES. Maximal size of possible extension queue 574. Compared 47746 event pairs, 951 based on Foata normal form. 18/6809 useless extension candidates. Maximal degree in co-relation 43014. Up to 5622 conditions per place. [2024-06-03 18:45:32,974 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 452 selfloop transitions, 92 changer transitions 0/550 dead transitions. [2024-06-03 18:45:32,974 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 506 places, 550 transitions, 7940 flow [2024-06-03 18:45:32,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 18:45:32,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 18:45:32,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 196 transitions. [2024-06-03 18:45:32,975 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5311653116531165 [2024-06-03 18:45:32,975 INFO L175 Difference]: Start difference. First operand has 498 places, 522 transitions, 6424 flow. Second operand 9 states and 196 transitions. [2024-06-03 18:45:32,975 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 506 places, 550 transitions, 7940 flow [2024-06-03 18:45:36,135 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 498 places, 550 transitions, 7771 flow, removed 9 selfloop flow, removed 8 redundant places. [2024-06-03 18:45:36,140 INFO L231 Difference]: Finished difference. Result has 499 places, 523 transitions, 6471 flow [2024-06-03 18:45:36,141 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6255, PETRI_DIFFERENCE_MINUEND_PLACES=490, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=522, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=91, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=431, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6471, PETRI_PLACES=499, PETRI_TRANSITIONS=523} [2024-06-03 18:45:36,141 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 457 predicate places. [2024-06-03 18:45:36,141 INFO L495 AbstractCegarLoop]: Abstraction has has 499 places, 523 transitions, 6471 flow [2024-06-03 18:45:36,141 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:45:36,141 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:45:36,141 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:45:36,141 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable203 [2024-06-03 18:45:36,141 INFO L420 AbstractCegarLoop]: === Iteration 205 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 18:45:36,141 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:45:36,141 INFO L85 PathProgramCache]: Analyzing trace with hash -1597575851, now seen corresponding path program 4 times [2024-06-03 18:45:36,141 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:45:36,141 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1135195277] [2024-06-03 18:45:36,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:45:36,141 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:45:36,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:45:36,273 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:45:36,273 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:45:36,273 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1135195277] [2024-06-03 18:45:36,273 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1135195277] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:45:36,273 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:45:36,273 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 18:45:36,273 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [642169996] [2024-06-03 18:45:36,273 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:45:36,273 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 18:45:36,273 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:45:36,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 18:45:36,273 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-03 18:45:36,320 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 18:45:36,320 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 499 places, 523 transitions, 6471 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:45:36,320 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:45:36,320 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 18:45:36,320 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:45:37,748 INFO L124 PetriNetUnfolderBase]: 4042/6772 cut-off events. [2024-06-03 18:45:37,748 INFO L125 PetriNetUnfolderBase]: For 404815/404827 co-relation queries the response was YES. [2024-06-03 18:45:37,820 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42404 conditions, 6772 events. 4042/6772 cut-off events. For 404815/404827 co-relation queries the response was YES. Maximal size of possible extension queue 574. Compared 47674 event pairs, 929 based on Foata normal form. 18/6790 useless extension candidates. Maximal degree in co-relation 42192. Up to 5616 conditions per place. [2024-06-03 18:45:37,846 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 453 selfloop transitions, 91 changer transitions 0/550 dead transitions. [2024-06-03 18:45:37,846 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 507 places, 550 transitions, 7717 flow [2024-06-03 18:45:37,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 18:45:37,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 18:45:37,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 197 transitions. [2024-06-03 18:45:37,847 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5338753387533876 [2024-06-03 18:45:37,847 INFO L175 Difference]: Start difference. First operand has 499 places, 523 transitions, 6471 flow. Second operand 9 states and 197 transitions. [2024-06-03 18:45:37,847 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 507 places, 550 transitions, 7717 flow [2024-06-03 18:45:40,931 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 500 places, 550 transitions, 7449 flow, removed 18 selfloop flow, removed 7 redundant places. [2024-06-03 18:45:40,936 INFO L231 Difference]: Finished difference. Result has 501 places, 523 transitions, 6389 flow [2024-06-03 18:45:40,937 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6203, PETRI_DIFFERENCE_MINUEND_PLACES=492, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=523, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=91, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=432, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6389, PETRI_PLACES=501, PETRI_TRANSITIONS=523} [2024-06-03 18:45:40,937 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 459 predicate places. [2024-06-03 18:45:40,937 INFO L495 AbstractCegarLoop]: Abstraction has has 501 places, 523 transitions, 6389 flow [2024-06-03 18:45:40,937 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:45:40,937 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:45:40,938 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:45:40,938 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable204 [2024-06-03 18:45:40,938 INFO L420 AbstractCegarLoop]: === Iteration 206 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 18:45:40,938 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:45:40,938 INFO L85 PathProgramCache]: Analyzing trace with hash -1597576037, now seen corresponding path program 5 times [2024-06-03 18:45:40,938 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:45:40,938 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1128675187] [2024-06-03 18:45:40,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:45:40,939 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:45:40,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:45:41,073 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:45:41,073 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:45:41,073 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1128675187] [2024-06-03 18:45:41,073 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1128675187] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:45:41,073 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:45:41,074 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 18:45:41,074 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [344291403] [2024-06-03 18:45:41,074 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:45:41,074 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 18:45:41,074 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:45:41,074 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 18:45:41,074 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-03 18:45:41,138 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 18:45:41,138 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 501 places, 523 transitions, 6389 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:45:41,138 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:45:41,138 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 18:45:41,138 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:45:42,603 INFO L124 PetriNetUnfolderBase]: 4070/6816 cut-off events. [2024-06-03 18:45:42,604 INFO L125 PetriNetUnfolderBase]: For 409691/409703 co-relation queries the response was YES. [2024-06-03 18:45:42,675 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42225 conditions, 6816 events. 4070/6816 cut-off events. For 409691/409703 co-relation queries the response was YES. Maximal size of possible extension queue 575. Compared 48030 event pairs, 897 based on Foata normal form. 18/6834 useless extension candidates. Maximal degree in co-relation 42013. Up to 5776 conditions per place. [2024-06-03 18:45:42,701 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 456 selfloop transitions, 91 changer transitions 0/553 dead transitions. [2024-06-03 18:45:42,701 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 509 places, 553 transitions, 7665 flow [2024-06-03 18:45:42,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 18:45:42,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 18:45:42,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 198 transitions. [2024-06-03 18:45:42,702 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5365853658536586 [2024-06-03 18:45:42,702 INFO L175 Difference]: Start difference. First operand has 501 places, 523 transitions, 6389 flow. Second operand 9 states and 198 transitions. [2024-06-03 18:45:42,702 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 509 places, 553 transitions, 7665 flow [2024-06-03 18:45:46,066 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 501 places, 553 transitions, 7464 flow, removed 3 selfloop flow, removed 8 redundant places. [2024-06-03 18:45:46,072 INFO L231 Difference]: Finished difference. Result has 503 places, 526 transitions, 6442 flow [2024-06-03 18:45:46,072 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6192, PETRI_DIFFERENCE_MINUEND_PLACES=493, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=523, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=432, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6442, PETRI_PLACES=503, PETRI_TRANSITIONS=526} [2024-06-03 18:45:46,072 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 461 predicate places. [2024-06-03 18:45:46,072 INFO L495 AbstractCegarLoop]: Abstraction has has 503 places, 526 transitions, 6442 flow [2024-06-03 18:45:46,073 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:45:46,073 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:45:46,073 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:45:46,073 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable205 [2024-06-03 18:45:46,073 INFO L420 AbstractCegarLoop]: === Iteration 207 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 18:45:46,073 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:45:46,073 INFO L85 PathProgramCache]: Analyzing trace with hash -1637987557, now seen corresponding path program 6 times [2024-06-03 18:45:46,073 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:45:46,073 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1290273308] [2024-06-03 18:45:46,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:45:46,073 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:45:46,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:45:46,205 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:45:46,205 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:45:46,205 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1290273308] [2024-06-03 18:45:46,205 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1290273308] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:45:46,205 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:45:46,205 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 18:45:46,205 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [408531319] [2024-06-03 18:45:46,205 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:45:46,206 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 18:45:46,206 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:45:46,206 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 18:45:46,206 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-06-03 18:45:46,255 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 18:45:46,256 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 503 places, 526 transitions, 6442 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:45:46,256 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:45:46,256 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 18:45:46,256 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:45:47,687 INFO L124 PetriNetUnfolderBase]: 4123/6903 cut-off events. [2024-06-03 18:45:47,688 INFO L125 PetriNetUnfolderBase]: For 468058/468062 co-relation queries the response was YES. [2024-06-03 18:45:47,762 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43875 conditions, 6903 events. 4123/6903 cut-off events. For 468058/468062 co-relation queries the response was YES. Maximal size of possible extension queue 585. Compared 48733 event pairs, 1056 based on Foata normal form. 10/6912 useless extension candidates. Maximal degree in co-relation 43661. Up to 5995 conditions per place. [2024-06-03 18:45:47,789 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 448 selfloop transitions, 97 changer transitions 0/551 dead transitions. [2024-06-03 18:45:47,790 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 510 places, 551 transitions, 8018 flow [2024-06-03 18:45:47,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 18:45:47,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 18:45:47,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 176 transitions. [2024-06-03 18:45:47,790 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5365853658536586 [2024-06-03 18:45:47,790 INFO L175 Difference]: Start difference. First operand has 503 places, 526 transitions, 6442 flow. Second operand 8 states and 176 transitions. [2024-06-03 18:45:47,790 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 510 places, 551 transitions, 8018 flow [2024-06-03 18:45:51,030 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 503 places, 551 transitions, 7810 flow, removed 17 selfloop flow, removed 7 redundant places. [2024-06-03 18:45:51,036 INFO L231 Difference]: Finished difference. Result has 504 places, 528 transitions, 6516 flow [2024-06-03 18:45:51,036 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6236, PETRI_DIFFERENCE_MINUEND_PLACES=496, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=526, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=96, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=430, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6516, PETRI_PLACES=504, PETRI_TRANSITIONS=528} [2024-06-03 18:45:51,037 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 462 predicate places. [2024-06-03 18:45:51,037 INFO L495 AbstractCegarLoop]: Abstraction has has 504 places, 528 transitions, 6516 flow [2024-06-03 18:45:51,037 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:45:51,037 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:45:51,037 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:45:51,037 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable206 [2024-06-03 18:45:51,037 INFO L420 AbstractCegarLoop]: === Iteration 208 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 18:45:51,037 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:45:51,037 INFO L85 PathProgramCache]: Analyzing trace with hash -1637867587, now seen corresponding path program 7 times [2024-06-03 18:45:51,037 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:45:51,037 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1757446024] [2024-06-03 18:45:51,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:45:51,038 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:45:51,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:45:51,177 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:45:51,177 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:45:51,177 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1757446024] [2024-06-03 18:45:51,177 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1757446024] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:45:51,177 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:45:51,177 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 18:45:51,178 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1075458413] [2024-06-03 18:45:51,178 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:45:51,178 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 18:45:51,178 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:45:51,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 18:45:51,178 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-03 18:45:51,243 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 18:45:51,243 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 504 places, 528 transitions, 6516 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:45:51,244 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:45:51,244 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 18:45:51,244 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:45:52,799 INFO L124 PetriNetUnfolderBase]: 4110/6882 cut-off events. [2024-06-03 18:45:52,799 INFO L125 PetriNetUnfolderBase]: For 412476/412488 co-relation queries the response was YES. [2024-06-03 18:45:52,866 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42657 conditions, 6882 events. 4110/6882 cut-off events. For 412476/412488 co-relation queries the response was YES. Maximal size of possible extension queue 585. Compared 48543 event pairs, 1050 based on Foata normal form. 18/6900 useless extension candidates. Maximal degree in co-relation 42443. Up to 6308 conditions per place. [2024-06-03 18:45:52,891 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 504 selfloop transitions, 35 changer transitions 0/545 dead transitions. [2024-06-03 18:45:52,892 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 511 places, 545 transitions, 7654 flow [2024-06-03 18:45:52,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 18:45:52,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 18:45:52,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 167 transitions. [2024-06-03 18:45:52,892 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5091463414634146 [2024-06-03 18:45:52,892 INFO L175 Difference]: Start difference. First operand has 504 places, 528 transitions, 6516 flow. Second operand 8 states and 167 transitions. [2024-06-03 18:45:52,892 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 511 places, 545 transitions, 7654 flow [2024-06-03 18:45:55,907 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 507 places, 545 transitions, 7482 flow, removed 29 selfloop flow, removed 4 redundant places. [2024-06-03 18:45:55,913 INFO L231 Difference]: Finished difference. Result has 508 places, 528 transitions, 6418 flow [2024-06-03 18:45:55,913 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6344, PETRI_DIFFERENCE_MINUEND_PLACES=500, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=528, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=493, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6418, PETRI_PLACES=508, PETRI_TRANSITIONS=528} [2024-06-03 18:45:55,913 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 466 predicate places. [2024-06-03 18:45:55,913 INFO L495 AbstractCegarLoop]: Abstraction has has 508 places, 528 transitions, 6418 flow [2024-06-03 18:45:55,913 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:45:55,913 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:45:55,913 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:45:55,913 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable207 [2024-06-03 18:45:55,914 INFO L420 AbstractCegarLoop]: === Iteration 209 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 18:45:55,914 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:45:55,914 INFO L85 PathProgramCache]: Analyzing trace with hash -1276511461, now seen corresponding path program 8 times [2024-06-03 18:45:55,914 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:45:55,914 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [701128444] [2024-06-03 18:45:55,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:45:55,914 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:45:55,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:45:56,051 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:45:56,051 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:45:56,051 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [701128444] [2024-06-03 18:45:56,051 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [701128444] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:45:56,051 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:45:56,051 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 18:45:56,051 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1217647428] [2024-06-03 18:45:56,051 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:45:56,051 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 18:45:56,051 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:45:56,051 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 18:45:56,052 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-03 18:45:56,105 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 18:45:56,106 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 508 places, 528 transitions, 6418 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:45:56,106 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:45:56,106 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 18:45:56,106 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:45:57,830 INFO L124 PetriNetUnfolderBase]: 4171/6987 cut-off events. [2024-06-03 18:45:57,830 INFO L125 PetriNetUnfolderBase]: For 472972/472984 co-relation queries the response was YES. [2024-06-03 18:45:57,889 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44158 conditions, 6987 events. 4171/6987 cut-off events. For 472972/472984 co-relation queries the response was YES. Maximal size of possible extension queue 591. Compared 49410 event pairs, 969 based on Foata normal form. 18/7005 useless extension candidates. Maximal degree in co-relation 43942. Up to 6246 conditions per place. [2024-06-03 18:45:57,912 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 496 selfloop transitions, 53 changer transitions 0/555 dead transitions. [2024-06-03 18:45:57,912 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 516 places, 555 transitions, 7978 flow [2024-06-03 18:45:57,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 18:45:57,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 18:45:57,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 187 transitions. [2024-06-03 18:45:57,913 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5067750677506775 [2024-06-03 18:45:57,913 INFO L175 Difference]: Start difference. First operand has 508 places, 528 transitions, 6418 flow. Second operand 9 states and 187 transitions. [2024-06-03 18:45:57,913 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 516 places, 555 transitions, 7978 flow [2024-06-03 18:46:01,692 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 508 places, 555 transitions, 7872 flow, removed 5 selfloop flow, removed 8 redundant places. [2024-06-03 18:46:01,710 INFO L231 Difference]: Finished difference. Result has 509 places, 532 transitions, 6522 flow [2024-06-03 18:46:01,711 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6312, PETRI_DIFFERENCE_MINUEND_PLACES=500, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=528, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=478, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6522, PETRI_PLACES=509, PETRI_TRANSITIONS=532} [2024-06-03 18:46:01,711 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 467 predicate places. [2024-06-03 18:46:01,711 INFO L495 AbstractCegarLoop]: Abstraction has has 509 places, 532 transitions, 6522 flow [2024-06-03 18:46:01,711 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:46:01,711 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:46:01,711 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:46:01,711 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable208 [2024-06-03 18:46:01,711 INFO L420 AbstractCegarLoop]: === Iteration 210 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 18:46:01,712 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:46:01,712 INFO L85 PathProgramCache]: Analyzing trace with hash -1281153091, now seen corresponding path program 9 times [2024-06-03 18:46:01,712 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:46:01,712 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [685366394] [2024-06-03 18:46:01,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:46:01,712 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:46:01,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:46:01,848 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:46:01,848 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:46:01,848 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [685366394] [2024-06-03 18:46:01,848 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [685366394] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:46:01,849 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:46:01,849 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 18:46:01,849 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [799665817] [2024-06-03 18:46:01,849 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:46:01,849 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 18:46:01,849 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:46:01,849 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 18:46:01,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-03 18:46:01,903 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 18:46:01,903 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 509 places, 532 transitions, 6522 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:46:01,903 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:46:01,904 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 18:46:01,904 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:46:03,426 INFO L124 PetriNetUnfolderBase]: 4158/6968 cut-off events. [2024-06-03 18:46:03,426 INFO L125 PetriNetUnfolderBase]: For 424109/424121 co-relation queries the response was YES. [2024-06-03 18:46:03,501 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43242 conditions, 6968 events. 4158/6968 cut-off events. For 424109/424121 co-relation queries the response was YES. Maximal size of possible extension queue 591. Compared 49320 event pairs, 967 based on Foata normal form. 18/6986 useless extension candidates. Maximal degree in co-relation 43026. Up to 6312 conditions per place. [2024-06-03 18:46:03,529 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 494 selfloop transitions, 50 changer transitions 0/550 dead transitions. [2024-06-03 18:46:03,529 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 516 places, 550 transitions, 7672 flow [2024-06-03 18:46:03,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 18:46:03,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 18:46:03,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 168 transitions. [2024-06-03 18:46:03,529 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5121951219512195 [2024-06-03 18:46:03,529 INFO L175 Difference]: Start difference. First operand has 509 places, 532 transitions, 6522 flow. Second operand 8 states and 168 transitions. [2024-06-03 18:46:03,529 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 516 places, 550 transitions, 7672 flow [2024-06-03 18:46:07,213 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 511 places, 550 transitions, 7544 flow, removed 35 selfloop flow, removed 5 redundant places. [2024-06-03 18:46:07,218 INFO L231 Difference]: Finished difference. Result has 512 places, 532 transitions, 6498 flow [2024-06-03 18:46:07,218 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6394, PETRI_DIFFERENCE_MINUEND_PLACES=504, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=532, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=482, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6498, PETRI_PLACES=512, PETRI_TRANSITIONS=532} [2024-06-03 18:46:07,219 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 470 predicate places. [2024-06-03 18:46:07,219 INFO L495 AbstractCegarLoop]: Abstraction has has 512 places, 532 transitions, 6498 flow [2024-06-03 18:46:07,219 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:46:07,219 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:46:07,219 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:46:07,219 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable209 [2024-06-03 18:46:07,219 INFO L420 AbstractCegarLoop]: === Iteration 211 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 18:46:07,219 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:46:07,220 INFO L85 PathProgramCache]: Analyzing trace with hash -1281273061, now seen corresponding path program 10 times [2024-06-03 18:46:07,220 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:46:07,220 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2116437928] [2024-06-03 18:46:07,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:46:07,220 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:46:07,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:46:07,343 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:46:07,343 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:46:07,343 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2116437928] [2024-06-03 18:46:07,343 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2116437928] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:46:07,343 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:46:07,343 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 18:46:07,343 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1965377617] [2024-06-03 18:46:07,343 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:46:07,344 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 18:46:07,344 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:46:07,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 18:46:07,344 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-06-03 18:46:07,385 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 18:46:07,386 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 512 places, 532 transitions, 6498 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:46:07,386 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:46:07,386 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 18:46:07,386 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:46:09,120 INFO L124 PetriNetUnfolderBase]: 4145/6947 cut-off events. [2024-06-03 18:46:09,120 INFO L125 PetriNetUnfolderBase]: For 364567/364571 co-relation queries the response was YES. [2024-06-03 18:46:09,183 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41991 conditions, 6947 events. 4145/6947 cut-off events. For 364567/364571 co-relation queries the response was YES. Maximal size of possible extension queue 589. Compared 49061 event pairs, 1025 based on Foata normal form. 10/6956 useless extension candidates. Maximal degree in co-relation 41775. Up to 5226 conditions per place. [2024-06-03 18:46:09,205 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 424 selfloop transitions, 125 changer transitions 0/555 dead transitions. [2024-06-03 18:46:09,206 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 519 places, 555 transitions, 7734 flow [2024-06-03 18:46:09,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 18:46:09,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 18:46:09,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 175 transitions. [2024-06-03 18:46:09,206 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5335365853658537 [2024-06-03 18:46:09,206 INFO L175 Difference]: Start difference. First operand has 512 places, 532 transitions, 6498 flow. Second operand 8 states and 175 transitions. [2024-06-03 18:46:09,206 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 519 places, 555 transitions, 7734 flow [2024-06-03 18:46:11,695 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 511 places, 555 transitions, 7608 flow, removed 2 selfloop flow, removed 8 redundant places. [2024-06-03 18:46:11,700 INFO L231 Difference]: Finished difference. Result has 512 places, 532 transitions, 6626 flow [2024-06-03 18:46:11,701 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6372, PETRI_DIFFERENCE_MINUEND_PLACES=504, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=532, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=125, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=407, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6626, PETRI_PLACES=512, PETRI_TRANSITIONS=532} [2024-06-03 18:46:11,701 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 470 predicate places. [2024-06-03 18:46:11,701 INFO L495 AbstractCegarLoop]: Abstraction has has 512 places, 532 transitions, 6626 flow [2024-06-03 18:46:11,701 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:46:11,701 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:46:11,701 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:46:11,701 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable210 [2024-06-03 18:46:11,701 INFO L420 AbstractCegarLoop]: === Iteration 212 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 18:46:11,701 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:46:11,701 INFO L85 PathProgramCache]: Analyzing trace with hash 1944359919, now seen corresponding path program 1 times [2024-06-03 18:46:11,702 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:46:11,702 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [191334480] [2024-06-03 18:46:11,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:46:11,702 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:46:11,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:46:11,836 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:46:11,836 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:46:11,836 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [191334480] [2024-06-03 18:46:11,837 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [191334480] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:46:11,837 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:46:11,837 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 18:46:11,837 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1426246361] [2024-06-03 18:46:11,837 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:46:11,837 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 18:46:11,837 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:46:11,837 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 18:46:11,837 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2024-06-03 18:46:11,898 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 18:46:11,898 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 512 places, 532 transitions, 6626 flow. Second operand has 10 states, 10 states have (on average 14.9) internal successors, (149), 10 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:46:11,898 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:46:11,898 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 18:46:11,898 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:46:13,929 INFO L124 PetriNetUnfolderBase]: 4434/7467 cut-off events. [2024-06-03 18:46:13,929 INFO L125 PetriNetUnfolderBase]: For 943774/943782 co-relation queries the response was YES. [2024-06-03 18:46:13,998 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51870 conditions, 7467 events. 4434/7467 cut-off events. For 943774/943782 co-relation queries the response was YES. Maximal size of possible extension queue 607. Compared 53228 event pairs, 1057 based on Foata normal form. 26/7492 useless extension candidates. Maximal degree in co-relation 51653. Up to 2793 conditions per place. [2024-06-03 18:46:14,022 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 332 selfloop transitions, 234 changer transitions 16/588 dead transitions. [2024-06-03 18:46:14,022 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 522 places, 588 transitions, 8690 flow [2024-06-03 18:46:14,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-03 18:46:14,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-03 18:46:14,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 258 transitions. [2024-06-03 18:46:14,023 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5720620842572062 [2024-06-03 18:46:14,023 INFO L175 Difference]: Start difference. First operand has 512 places, 532 transitions, 6626 flow. Second operand 11 states and 258 transitions. [2024-06-03 18:46:14,023 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 522 places, 588 transitions, 8690 flow [2024-06-03 18:46:19,689 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 513 places, 588 transitions, 8232 flow, removed 17 selfloop flow, removed 9 redundant places. [2024-06-03 18:46:19,695 INFO L231 Difference]: Finished difference. Result has 514 places, 529 transitions, 6610 flow [2024-06-03 18:46:19,695 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6168, PETRI_DIFFERENCE_MINUEND_PLACES=503, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=532, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=234, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=298, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=6610, PETRI_PLACES=514, PETRI_TRANSITIONS=529} [2024-06-03 18:46:19,695 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 472 predicate places. [2024-06-03 18:46:19,695 INFO L495 AbstractCegarLoop]: Abstraction has has 514 places, 529 transitions, 6610 flow [2024-06-03 18:46:19,696 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.9) internal successors, (149), 10 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:46:19,696 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:46:19,696 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:46:19,696 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable211 [2024-06-03 18:46:19,696 INFO L420 AbstractCegarLoop]: === Iteration 213 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 18:46:19,696 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:46:19,696 INFO L85 PathProgramCache]: Analyzing trace with hash -1939201459, now seen corresponding path program 2 times [2024-06-03 18:46:19,696 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:46:19,696 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1085006551] [2024-06-03 18:46:19,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:46:19,697 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:46:19,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:46:19,842 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:46:19,842 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:46:19,842 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1085006551] [2024-06-03 18:46:19,842 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1085006551] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:46:19,842 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:46:19,842 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 18:46:19,842 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1605524523] [2024-06-03 18:46:19,842 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:46:19,842 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 18:46:19,842 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:46:19,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 18:46:19,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-03 18:46:19,907 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 18:46:19,907 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 514 places, 529 transitions, 6610 flow. Second operand has 10 states, 10 states have (on average 14.9) internal successors, (149), 10 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:46:19,907 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:46:19,907 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 18:46:19,907 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:46:22,031 INFO L124 PetriNetUnfolderBase]: 4444/7486 cut-off events. [2024-06-03 18:46:22,032 INFO L125 PetriNetUnfolderBase]: For 1123600/1123612 co-relation queries the response was YES. [2024-06-03 18:46:22,101 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53598 conditions, 7486 events. 4444/7486 cut-off events. For 1123600/1123612 co-relation queries the response was YES. Maximal size of possible extension queue 603. Compared 53541 event pairs, 926 based on Foata normal form. 30/7516 useless extension candidates. Maximal degree in co-relation 53383. Up to 5422 conditions per place. [2024-06-03 18:46:22,126 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 435 selfloop transitions, 129 changer transitions 8/578 dead transitions. [2024-06-03 18:46:22,126 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 520 places, 578 transitions, 8330 flow [2024-06-03 18:46:22,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-03 18:46:22,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-03 18:46:22,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 247 transitions. [2024-06-03 18:46:22,127 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5476718403547672 [2024-06-03 18:46:22,127 INFO L175 Difference]: Start difference. First operand has 514 places, 529 transitions, 6610 flow. Second operand 11 states and 247 transitions. [2024-06-03 18:46:22,127 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 520 places, 578 transitions, 8330 flow [2024-06-03 18:46:29,227 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 511 places, 578 transitions, 7868 flow, removed 4 selfloop flow, removed 9 redundant places. [2024-06-03 18:46:29,232 INFO L231 Difference]: Finished difference. Result has 512 places, 527 transitions, 6397 flow [2024-06-03 18:46:29,232 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6152, PETRI_DIFFERENCE_MINUEND_PLACES=501, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=529, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=129, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=400, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=6397, PETRI_PLACES=512, PETRI_TRANSITIONS=527} [2024-06-03 18:46:29,233 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 470 predicate places. [2024-06-03 18:46:29,233 INFO L495 AbstractCegarLoop]: Abstraction has has 512 places, 527 transitions, 6397 flow [2024-06-03 18:46:29,233 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.9) internal successors, (149), 10 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:46:29,233 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:46:29,233 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:46:29,233 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable212 [2024-06-03 18:46:29,233 INFO L420 AbstractCegarLoop]: === Iteration 214 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 18:46:29,233 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:46:29,233 INFO L85 PathProgramCache]: Analyzing trace with hash -1939195879, now seen corresponding path program 3 times [2024-06-03 18:46:29,233 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:46:29,233 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [179993718] [2024-06-03 18:46:29,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:46:29,234 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:46:29,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:46:29,394 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:46:29,394 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:46:29,394 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [179993718] [2024-06-03 18:46:29,394 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [179993718] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:46:29,394 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:46:29,394 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 18:46:29,394 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1667789408] [2024-06-03 18:46:29,394 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:46:29,394 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 18:46:29,394 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:46:29,395 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 18:46:29,395 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-03 18:46:29,472 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 18:46:29,472 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 512 places, 527 transitions, 6397 flow. Second operand has 10 states, 10 states have (on average 14.9) internal successors, (149), 10 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:46:29,472 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:46:29,472 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 18:46:29,472 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:46:31,345 INFO L124 PetriNetUnfolderBase]: 4212/7078 cut-off events. [2024-06-03 18:46:31,346 INFO L125 PetriNetUnfolderBase]: For 701896/701908 co-relation queries the response was YES. [2024-06-03 18:46:31,416 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45640 conditions, 7078 events. 4212/7078 cut-off events. For 701896/701908 co-relation queries the response was YES. Maximal size of possible extension queue 589. Compared 50110 event pairs, 825 based on Foata normal form. 30/7108 useless extension candidates. Maximal degree in co-relation 45426. Up to 5217 conditions per place. [2024-06-03 18:46:31,444 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 420 selfloop transitions, 126 changer transitions 19/571 dead transitions. [2024-06-03 18:46:31,444 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 520 places, 571 transitions, 7777 flow [2024-06-03 18:46:31,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-03 18:46:31,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-03 18:46:31,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 241 transitions. [2024-06-03 18:46:31,445 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5343680709534369 [2024-06-03 18:46:31,445 INFO L175 Difference]: Start difference. First operand has 512 places, 527 transitions, 6397 flow. Second operand 11 states and 241 transitions. [2024-06-03 18:46:31,445 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 520 places, 571 transitions, 7777 flow [2024-06-03 18:46:35,393 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 510 places, 571 transitions, 7516 flow, removed 2 selfloop flow, removed 10 redundant places. [2024-06-03 18:46:35,398 INFO L231 Difference]: Finished difference. Result has 511 places, 523 transitions, 6341 flow [2024-06-03 18:46:35,398 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6136, PETRI_DIFFERENCE_MINUEND_PLACES=500, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=527, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=126, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=401, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=6341, PETRI_PLACES=511, PETRI_TRANSITIONS=523} [2024-06-03 18:46:35,398 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 469 predicate places. [2024-06-03 18:46:35,398 INFO L495 AbstractCegarLoop]: Abstraction has has 511 places, 523 transitions, 6341 flow [2024-06-03 18:46:35,398 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.9) internal successors, (149), 10 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:46:35,398 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:46:35,399 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:46:35,399 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable213 [2024-06-03 18:46:35,399 INFO L420 AbstractCegarLoop]: === Iteration 215 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 18:46:35,399 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:46:35,399 INFO L85 PathProgramCache]: Analyzing trace with hash 942512007, now seen corresponding path program 4 times [2024-06-03 18:46:35,399 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:46:35,399 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [844061155] [2024-06-03 18:46:35,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:46:35,399 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:46:35,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:46:35,579 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:46:35,579 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:46:35,579 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [844061155] [2024-06-03 18:46:35,579 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [844061155] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:46:35,579 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:46:35,579 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 18:46:35,579 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [43134311] [2024-06-03 18:46:35,580 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:46:35,580 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 18:46:35,580 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:46:35,580 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 18:46:35,580 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-03 18:46:35,641 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 18:46:35,642 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 511 places, 523 transitions, 6341 flow. Second operand has 10 states, 10 states have (on average 14.9) internal successors, (149), 10 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:46:35,642 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:46:35,642 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 18:46:35,642 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:46:37,582 INFO L124 PetriNetUnfolderBase]: 4333/7299 cut-off events. [2024-06-03 18:46:37,583 INFO L125 PetriNetUnfolderBase]: For 1020141/1020153 co-relation queries the response was YES. [2024-06-03 18:46:37,653 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51371 conditions, 7299 events. 4333/7299 cut-off events. For 1020141/1020153 co-relation queries the response was YES. Maximal size of possible extension queue 593. Compared 51969 event pairs, 933 based on Foata normal form. 30/7329 useless extension candidates. Maximal degree in co-relation 51158. Up to 5061 conditions per place. [2024-06-03 18:46:37,680 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 430 selfloop transitions, 125 changer transitions 13/574 dead transitions. [2024-06-03 18:46:37,680 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 516 places, 574 transitions, 8047 flow [2024-06-03 18:46:37,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-03 18:46:37,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-03 18:46:37,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 276 transitions. [2024-06-03 18:46:37,681 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5178236397748592 [2024-06-03 18:46:37,681 INFO L175 Difference]: Start difference. First operand has 511 places, 523 transitions, 6341 flow. Second operand 13 states and 276 transitions. [2024-06-03 18:46:37,681 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 516 places, 574 transitions, 8047 flow [2024-06-03 18:46:43,324 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 506 places, 574 transitions, 7768 flow, removed 3 selfloop flow, removed 10 redundant places. [2024-06-03 18:46:43,330 INFO L231 Difference]: Finished difference. Result has 507 places, 520 transitions, 6276 flow [2024-06-03 18:46:43,330 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6064, PETRI_DIFFERENCE_MINUEND_PLACES=494, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=523, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=125, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=398, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=6276, PETRI_PLACES=507, PETRI_TRANSITIONS=520} [2024-06-03 18:46:43,330 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 465 predicate places. [2024-06-03 18:46:43,330 INFO L495 AbstractCegarLoop]: Abstraction has has 507 places, 520 transitions, 6276 flow [2024-06-03 18:46:43,331 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.9) internal successors, (149), 10 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:46:43,331 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:46:43,331 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:46:43,331 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable214 [2024-06-03 18:46:43,331 INFO L420 AbstractCegarLoop]: === Iteration 216 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 18:46:43,331 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:46:43,331 INFO L85 PathProgramCache]: Analyzing trace with hash -743091635, now seen corresponding path program 5 times [2024-06-03 18:46:43,331 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:46:43,331 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1527456823] [2024-06-03 18:46:43,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:46:43,331 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:46:43,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:46:43,472 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:46:43,472 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:46:43,472 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1527456823] [2024-06-03 18:46:43,472 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1527456823] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:46:43,472 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:46:43,472 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 18:46:43,472 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1499605599] [2024-06-03 18:46:43,472 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:46:43,472 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 18:46:43,472 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:46:43,472 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 18:46:43,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-03 18:46:43,535 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 18:46:43,536 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 507 places, 520 transitions, 6276 flow. Second operand has 10 states, 10 states have (on average 14.9) internal successors, (149), 10 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:46:43,536 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:46:43,536 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 18:46:43,536 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:46:45,309 INFO L124 PetriNetUnfolderBase]: 4289/7227 cut-off events. [2024-06-03 18:46:45,310 INFO L125 PetriNetUnfolderBase]: For 1017787/1017799 co-relation queries the response was YES. [2024-06-03 18:46:45,381 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50838 conditions, 7227 events. 4289/7227 cut-off events. For 1017787/1017799 co-relation queries the response was YES. Maximal size of possible extension queue 584. Compared 51407 event pairs, 933 based on Foata normal form. 30/7257 useless extension candidates. Maximal degree in co-relation 50626. Up to 5061 conditions per place. [2024-06-03 18:46:45,527 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 439 selfloop transitions, 119 changer transitions 8/572 dead transitions. [2024-06-03 18:46:45,527 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 514 places, 572 transitions, 8274 flow [2024-06-03 18:46:45,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-03 18:46:45,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-03 18:46:45,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 264 transitions. [2024-06-03 18:46:45,528 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5365853658536586 [2024-06-03 18:46:45,528 INFO L175 Difference]: Start difference. First operand has 507 places, 520 transitions, 6276 flow. Second operand 12 states and 264 transitions. [2024-06-03 18:46:45,528 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 514 places, 572 transitions, 8274 flow [2024-06-03 18:46:51,675 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 504 places, 572 transitions, 8024 flow, removed 3 selfloop flow, removed 10 redundant places. [2024-06-03 18:46:51,681 INFO L231 Difference]: Finished difference. Result has 505 places, 518 transitions, 6254 flow [2024-06-03 18:46:51,681 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6030, PETRI_DIFFERENCE_MINUEND_PLACES=493, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=520, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=119, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=401, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=6254, PETRI_PLACES=505, PETRI_TRANSITIONS=518} [2024-06-03 18:46:51,681 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 463 predicate places. [2024-06-03 18:46:51,681 INFO L495 AbstractCegarLoop]: Abstraction has has 505 places, 518 transitions, 6254 flow [2024-06-03 18:46:51,681 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.9) internal successors, (149), 10 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:46:51,681 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:46:51,682 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:46:51,682 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable215 [2024-06-03 18:46:51,682 INFO L420 AbstractCegarLoop]: === Iteration 217 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 18:46:51,682 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:46:51,682 INFO L85 PathProgramCache]: Analyzing trace with hash -743086055, now seen corresponding path program 6 times [2024-06-03 18:46:51,682 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:46:51,682 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2025917959] [2024-06-03 18:46:51,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:46:51,682 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:46:51,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:46:51,824 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:46:51,825 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:46:51,825 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2025917959] [2024-06-03 18:46:51,825 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2025917959] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:46:51,825 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:46:51,825 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 18:46:51,825 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1570839945] [2024-06-03 18:46:51,825 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:46:51,825 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 18:46:51,825 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:46:51,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 18:46:51,825 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-03 18:46:51,914 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 18:46:51,914 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 505 places, 518 transitions, 6254 flow. Second operand has 10 states, 10 states have (on average 14.9) internal successors, (149), 10 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:46:51,914 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:46:51,914 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 18:46:51,914 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:46:53,818 INFO L124 PetriNetUnfolderBase]: 4184/7044 cut-off events. [2024-06-03 18:46:53,818 INFO L125 PetriNetUnfolderBase]: For 857251/857263 co-relation queries the response was YES. [2024-06-03 18:46:53,882 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47604 conditions, 7044 events. 4184/7044 cut-off events. For 857251/857263 co-relation queries the response was YES. Maximal size of possible extension queue 577. Compared 49841 event pairs, 965 based on Foata normal form. 30/7074 useless extension candidates. Maximal degree in co-relation 47392. Up to 5061 conditions per place. [2024-06-03 18:46:53,906 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 424 selfloop transitions, 115 changer transitions 20/565 dead transitions. [2024-06-03 18:46:53,906 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 514 places, 565 transitions, 7916 flow [2024-06-03 18:46:53,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-03 18:46:53,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-03 18:46:53,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 258 transitions. [2024-06-03 18:46:53,907 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.524390243902439 [2024-06-03 18:46:53,907 INFO L175 Difference]: Start difference. First operand has 505 places, 518 transitions, 6254 flow. Second operand 12 states and 258 transitions. [2024-06-03 18:46:53,907 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 514 places, 565 transitions, 7916 flow [2024-06-03 18:46:58,533 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 504 places, 565 transitions, 7675 flow, removed 4 selfloop flow, removed 10 redundant places. [2024-06-03 18:46:58,538 INFO L231 Difference]: Finished difference. Result has 505 places, 513 transitions, 6171 flow [2024-06-03 18:46:58,538 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6017, PETRI_DIFFERENCE_MINUEND_PLACES=493, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=518, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=115, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=403, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=6171, PETRI_PLACES=505, PETRI_TRANSITIONS=513} [2024-06-03 18:46:58,538 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 463 predicate places. [2024-06-03 18:46:58,538 INFO L495 AbstractCegarLoop]: Abstraction has has 505 places, 513 transitions, 6171 flow [2024-06-03 18:46:58,539 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.9) internal successors, (149), 10 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:46:58,539 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:46:58,539 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:46:58,539 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable216 [2024-06-03 18:46:58,539 INFO L420 AbstractCegarLoop]: === Iteration 218 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 18:46:58,539 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:46:58,539 INFO L85 PathProgramCache]: Analyzing trace with hash -480056239, now seen corresponding path program 7 times [2024-06-03 18:46:58,539 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:46:58,539 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1418344313] [2024-06-03 18:46:58,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:46:58,539 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:46:58,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:46:58,715 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:46:58,715 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:46:58,715 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1418344313] [2024-06-03 18:46:58,715 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1418344313] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:46:58,715 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:46:58,716 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 18:46:58,716 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1351904547] [2024-06-03 18:46:58,716 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:46:58,716 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 18:46:58,716 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:46:58,716 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 18:46:58,716 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-03 18:46:58,799 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 18:46:58,799 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 505 places, 513 transitions, 6171 flow. Second operand has 10 states, 10 states have (on average 14.9) internal successors, (149), 10 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:46:58,799 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:46:58,799 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 18:46:58,799 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:47:00,576 INFO L124 PetriNetUnfolderBase]: 4285/7206 cut-off events. [2024-06-03 18:47:00,577 INFO L125 PetriNetUnfolderBase]: For 1132355/1132363 co-relation queries the response was YES. [2024-06-03 18:47:00,643 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51934 conditions, 7206 events. 4285/7206 cut-off events. For 1132355/1132363 co-relation queries the response was YES. Maximal size of possible extension queue 584. Compared 51371 event pairs, 1238 based on Foata normal form. 32/7237 useless extension candidates. Maximal degree in co-relation 51723. Up to 5632 conditions per place. [2024-06-03 18:47:00,668 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 311 selfloop transitions, 223 changer transitions 19/559 dead transitions. [2024-06-03 18:47:00,668 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 510 places, 559 transitions, 7815 flow [2024-06-03 18:47:00,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-03 18:47:00,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-03 18:47:00,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 281 transitions. [2024-06-03 18:47:00,669 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5272045028142589 [2024-06-03 18:47:00,669 INFO L175 Difference]: Start difference. First operand has 505 places, 513 transitions, 6171 flow. Second operand 13 states and 281 transitions. [2024-06-03 18:47:00,669 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 510 places, 559 transitions, 7815 flow [2024-06-03 18:47:07,880 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 498 places, 559 transitions, 7467 flow, removed 5 selfloop flow, removed 12 redundant places. [2024-06-03 18:47:07,886 INFO L231 Difference]: Finished difference. Result has 499 places, 509 transitions, 6224 flow [2024-06-03 18:47:07,886 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5825, PETRI_DIFFERENCE_MINUEND_PLACES=486, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=513, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=223, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=290, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=6224, PETRI_PLACES=499, PETRI_TRANSITIONS=509} [2024-06-03 18:47:07,886 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 457 predicate places. [2024-06-03 18:47:07,887 INFO L495 AbstractCegarLoop]: Abstraction has has 499 places, 509 transitions, 6224 flow [2024-06-03 18:47:07,887 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.9) internal successors, (149), 10 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:47:07,887 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:47:07,887 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:47:07,887 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable217 [2024-06-03 18:47:07,887 INFO L420 AbstractCegarLoop]: === Iteration 219 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 18:47:07,887 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:47:07,887 INFO L85 PathProgramCache]: Analyzing trace with hash -214032529, now seen corresponding path program 8 times [2024-06-03 18:47:07,888 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:47:07,888 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1426357055] [2024-06-03 18:47:07,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:47:07,888 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:47:07,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:47:08,030 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:47:08,030 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:47:08,030 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1426357055] [2024-06-03 18:47:08,031 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1426357055] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:47:08,031 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:47:08,031 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 18:47:08,031 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1841297408] [2024-06-03 18:47:08,031 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:47:08,031 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 18:47:08,031 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:47:08,031 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 18:47:08,031 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2024-06-03 18:47:08,090 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 18:47:08,090 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 499 places, 509 transitions, 6224 flow. Second operand has 10 states, 10 states have (on average 14.9) internal successors, (149), 10 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:47:08,090 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:47:08,090 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 18:47:08,090 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:47:09,888 INFO L124 PetriNetUnfolderBase]: 4197/7066 cut-off events. [2024-06-03 18:47:09,888 INFO L125 PetriNetUnfolderBase]: For 1144569/1144577 co-relation queries the response was YES. [2024-06-03 18:47:09,949 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50921 conditions, 7066 events. 4197/7066 cut-off events. For 1144569/1144577 co-relation queries the response was YES. Maximal size of possible extension queue 579. Compared 50198 event pairs, 1276 based on Foata normal form. 34/7099 useless extension candidates. Maximal degree in co-relation 50712. Up to 6083 conditions per place. [2024-06-03 18:47:09,973 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 303 selfloop transitions, 220 changer transitions 12/541 dead transitions. [2024-06-03 18:47:09,973 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 507 places, 541 transitions, 7430 flow [2024-06-03 18:47:09,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-03 18:47:09,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-03 18:47:09,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 270 transitions. [2024-06-03 18:47:09,974 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5065666041275797 [2024-06-03 18:47:09,974 INFO L175 Difference]: Start difference. First operand has 499 places, 509 transitions, 6224 flow. Second operand 13 states and 270 transitions. [2024-06-03 18:47:09,974 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 507 places, 541 transitions, 7430 flow [2024-06-03 18:47:18,026 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 496 places, 541 transitions, 7018 flow, removed 2 selfloop flow, removed 11 redundant places. [2024-06-03 18:47:18,032 INFO L231 Difference]: Finished difference. Result has 497 places, 505 transitions, 6229 flow [2024-06-03 18:47:18,032 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5812, PETRI_DIFFERENCE_MINUEND_PLACES=484, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=509, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=220, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=289, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=6229, PETRI_PLACES=497, PETRI_TRANSITIONS=505} [2024-06-03 18:47:18,032 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 455 predicate places. [2024-06-03 18:47:18,032 INFO L495 AbstractCegarLoop]: Abstraction has has 497 places, 505 transitions, 6229 flow [2024-06-03 18:47:18,032 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.9) internal successors, (149), 10 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:47:18,032 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:47:18,033 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:47:18,033 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable218 [2024-06-03 18:47:18,033 INFO L420 AbstractCegarLoop]: === Iteration 220 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 18:47:18,033 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:47:18,033 INFO L85 PathProgramCache]: Analyzing trace with hash -590284113, now seen corresponding path program 9 times [2024-06-03 18:47:18,033 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:47:18,033 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [174781179] [2024-06-03 18:47:18,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:47:18,033 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:47:18,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:47:18,169 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:47:18,169 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:47:18,169 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [174781179] [2024-06-03 18:47:18,169 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [174781179] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:47:18,169 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:47:18,169 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 18:47:18,169 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1121658788] [2024-06-03 18:47:18,169 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:47:18,170 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 18:47:18,170 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:47:18,170 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 18:47:18,170 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-03 18:47:18,234 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 18:47:18,234 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 497 places, 505 transitions, 6229 flow. Second operand has 10 states, 10 states have (on average 14.9) internal successors, (149), 10 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:47:18,234 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:47:18,234 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 18:47:18,234 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:47:20,140 INFO L124 PetriNetUnfolderBase]: 4357/7358 cut-off events. [2024-06-03 18:47:20,140 INFO L125 PetriNetUnfolderBase]: For 1425122/1425130 co-relation queries the response was YES. [2024-06-03 18:47:20,208 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57776 conditions, 7358 events. 4357/7358 cut-off events. For 1425122/1425130 co-relation queries the response was YES. Maximal size of possible extension queue 582. Compared 52626 event pairs, 1249 based on Foata normal form. 26/7383 useless extension candidates. Maximal degree in co-relation 57568. Up to 4899 conditions per place. [2024-06-03 18:47:20,235 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 310 selfloop transitions, 223 changer transitions 16/555 dead transitions. [2024-06-03 18:47:20,235 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 505 places, 555 transitions, 8157 flow [2024-06-03 18:47:20,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-03 18:47:20,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-03 18:47:20,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 270 transitions. [2024-06-03 18:47:20,236 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5487804878048781 [2024-06-03 18:47:20,236 INFO L175 Difference]: Start difference. First operand has 497 places, 505 transitions, 6229 flow. Second operand 12 states and 270 transitions. [2024-06-03 18:47:20,236 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 505 places, 555 transitions, 8157 flow [2024-06-03 18:47:30,119 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 493 places, 555 transitions, 7705 flow, removed 6 selfloop flow, removed 12 redundant places. [2024-06-03 18:47:30,125 INFO L231 Difference]: Finished difference. Result has 494 places, 502 transitions, 6206 flow [2024-06-03 18:47:30,125 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5785, PETRI_DIFFERENCE_MINUEND_PLACES=482, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=505, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=223, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=282, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=6206, PETRI_PLACES=494, PETRI_TRANSITIONS=502} [2024-06-03 18:47:30,125 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 452 predicate places. [2024-06-03 18:47:30,125 INFO L495 AbstractCegarLoop]: Abstraction has has 494 places, 502 transitions, 6206 flow [2024-06-03 18:47:30,125 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.9) internal successors, (149), 10 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:47:30,125 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:47:30,125 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:47:30,125 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable219 [2024-06-03 18:47:30,125 INFO L420 AbstractCegarLoop]: === Iteration 221 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 18:47:30,126 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:47:30,126 INFO L85 PathProgramCache]: Analyzing trace with hash 153709259, now seen corresponding path program 10 times [2024-06-03 18:47:30,126 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:47:30,126 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1339450342] [2024-06-03 18:47:30,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:47:30,126 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:47:30,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:47:30,267 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:47:30,267 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:47:30,267 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1339450342] [2024-06-03 18:47:30,267 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1339450342] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:47:30,267 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:47:30,267 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 18:47:30,268 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [195450413] [2024-06-03 18:47:30,268 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:47:30,268 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 18:47:30,268 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:47:30,268 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 18:47:30,268 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2024-06-03 18:47:30,322 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 18:47:30,323 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 494 places, 502 transitions, 6206 flow. Second operand has 10 states, 10 states have (on average 14.9) internal successors, (149), 10 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:47:30,323 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:47:30,323 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 18:47:30,323 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:47:32,110 INFO L124 PetriNetUnfolderBase]: 4306/7265 cut-off events. [2024-06-03 18:47:32,111 INFO L125 PetriNetUnfolderBase]: For 1459687/1459695 co-relation queries the response was YES. [2024-06-03 18:47:32,175 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57526 conditions, 7265 events. 4306/7265 cut-off events. For 1459687/1459695 co-relation queries the response was YES. Maximal size of possible extension queue 575. Compared 52080 event pairs, 1360 based on Foata normal form. 32/7296 useless extension candidates. Maximal degree in co-relation 57319. Up to 6243 conditions per place. [2024-06-03 18:47:32,200 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 295 selfloop transitions, 216 changer transitions 21/538 dead transitions. [2024-06-03 18:47:32,200 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 502 places, 538 transitions, 7454 flow [2024-06-03 18:47:32,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-03 18:47:32,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-03 18:47:32,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 271 transitions. [2024-06-03 18:47:32,201 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5084427767354597 [2024-06-03 18:47:32,201 INFO L175 Difference]: Start difference. First operand has 494 places, 502 transitions, 6206 flow. Second operand 13 states and 271 transitions. [2024-06-03 18:47:32,201 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 502 places, 538 transitions, 7454 flow [2024-06-03 18:47:40,983 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 492 places, 538 transitions, 7018 flow, removed 2 selfloop flow, removed 10 redundant places. [2024-06-03 18:47:40,988 INFO L231 Difference]: Finished difference. Result has 493 places, 497 transitions, 6152 flow [2024-06-03 18:47:40,988 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5770, PETRI_DIFFERENCE_MINUEND_PLACES=480, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=502, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=216, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=286, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=6152, PETRI_PLACES=493, PETRI_TRANSITIONS=497} [2024-06-03 18:47:40,989 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 451 predicate places. [2024-06-03 18:47:40,989 INFO L495 AbstractCegarLoop]: Abstraction has has 493 places, 497 transitions, 6152 flow [2024-06-03 18:47:40,989 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.9) internal successors, (149), 10 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:47:40,989 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:47:40,989 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:47:40,989 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable220 [2024-06-03 18:47:40,989 INFO L420 AbstractCegarLoop]: === Iteration 222 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 18:47:40,989 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:47:40,989 INFO L85 PathProgramCache]: Analyzing trace with hash -586565043, now seen corresponding path program 11 times [2024-06-03 18:47:40,989 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:47:40,989 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1237372732] [2024-06-03 18:47:40,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:47:40,989 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:47:40,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:47:41,139 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:47:41,139 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:47:41,139 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1237372732] [2024-06-03 18:47:41,139 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1237372732] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:47:41,139 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:47:41,139 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 18:47:41,139 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1792819678] [2024-06-03 18:47:41,139 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:47:41,140 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 18:47:41,140 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:47:41,140 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 18:47:41,140 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-03 18:47:41,224 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 18:47:41,224 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 493 places, 497 transitions, 6152 flow. Second operand has 10 states, 10 states have (on average 14.9) internal successors, (149), 10 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:47:41,224 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:47:41,224 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 18:47:41,224 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:47:43,070 INFO L124 PetriNetUnfolderBase]: 4249/7155 cut-off events. [2024-06-03 18:47:43,070 INFO L125 PetriNetUnfolderBase]: For 1386795/1386807 co-relation queries the response was YES. [2024-06-03 18:47:43,132 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56797 conditions, 7155 events. 4249/7155 cut-off events. For 1386795/1386807 co-relation queries the response was YES. Maximal size of possible extension queue 566. Compared 50904 event pairs, 1216 based on Foata normal form. 30/7185 useless extension candidates. Maximal degree in co-relation 56591. Up to 5923 conditions per place. [2024-06-03 18:47:43,156 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 428 selfloop transitions, 98 changer transitions 8/540 dead transitions. [2024-06-03 18:47:43,156 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 498 places, 540 transitions, 7726 flow [2024-06-03 18:47:43,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-03 18:47:43,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-03 18:47:43,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 257 transitions. [2024-06-03 18:47:43,157 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5223577235772358 [2024-06-03 18:47:43,157 INFO L175 Difference]: Start difference. First operand has 493 places, 497 transitions, 6152 flow. Second operand 12 states and 257 transitions. [2024-06-03 18:47:43,157 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 498 places, 540 transitions, 7726 flow [2024-06-03 18:47:52,689 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 486 places, 540 transitions, 7278 flow, removed 8 selfloop flow, removed 12 redundant places. [2024-06-03 18:47:52,694 INFO L231 Difference]: Finished difference. Result has 487 places, 495 transitions, 5890 flow [2024-06-03 18:47:52,694 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5710, PETRI_DIFFERENCE_MINUEND_PLACES=475, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=497, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=98, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=399, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=5890, PETRI_PLACES=487, PETRI_TRANSITIONS=495} [2024-06-03 18:47:52,694 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 445 predicate places. [2024-06-03 18:47:52,694 INFO L495 AbstractCegarLoop]: Abstraction has has 487 places, 495 transitions, 5890 flow [2024-06-03 18:47:52,694 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.9) internal successors, (149), 10 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:47:52,694 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:47:52,694 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:47:52,694 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable221 [2024-06-03 18:47:52,694 INFO L420 AbstractCegarLoop]: === Iteration 223 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 18:47:52,695 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:47:52,695 INFO L85 PathProgramCache]: Analyzing trace with hash 256120541, now seen corresponding path program 12 times [2024-06-03 18:47:52,695 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:47:52,695 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [500091795] [2024-06-03 18:47:52,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:47:52,695 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:47:52,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:47:52,842 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:47:52,842 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:47:52,842 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [500091795] [2024-06-03 18:47:52,842 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [500091795] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:47:52,842 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:47:52,842 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 18:47:52,842 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2119547396] [2024-06-03 18:47:52,842 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:47:52,842 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 18:47:52,842 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:47:52,843 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 18:47:52,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-03 18:47:52,936 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 18:47:52,936 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 487 places, 495 transitions, 5890 flow. Second operand has 10 states, 10 states have (on average 14.9) internal successors, (149), 10 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:47:52,936 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:47:52,936 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 18:47:52,936 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:47:54,620 INFO L124 PetriNetUnfolderBase]: 4144/6968 cut-off events. [2024-06-03 18:47:54,620 INFO L125 PetriNetUnfolderBase]: For 1197055/1197067 co-relation queries the response was YES. [2024-06-03 18:47:54,682 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53229 conditions, 6968 events. 4144/6968 cut-off events. For 1197055/1197067 co-relation queries the response was YES. Maximal size of possible extension queue 559. Compared 49264 event pairs, 1204 based on Foata normal form. 30/6998 useless extension candidates. Maximal degree in co-relation 53025. Up to 5923 conditions per place. [2024-06-03 18:47:54,706 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 413 selfloop transitions, 95 changer transitions 19/533 dead transitions. [2024-06-03 18:47:54,706 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 496 places, 533 transitions, 7136 flow [2024-06-03 18:47:54,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-03 18:47:54,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-03 18:47:54,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 251 transitions. [2024-06-03 18:47:54,707 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5101626016260162 [2024-06-03 18:47:54,707 INFO L175 Difference]: Start difference. First operand has 487 places, 495 transitions, 5890 flow. Second operand 12 states and 251 transitions. [2024-06-03 18:47:54,707 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 496 places, 533 transitions, 7136 flow [2024-06-03 18:48:03,913 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 485 places, 533 transitions, 6937 flow, removed 2 selfloop flow, removed 11 redundant places. [2024-06-03 18:48:03,918 INFO L231 Difference]: Finished difference. Result has 486 places, 491 transitions, 5830 flow [2024-06-03 18:48:03,918 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5691, PETRI_DIFFERENCE_MINUEND_PLACES=474, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=495, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=95, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=400, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=5830, PETRI_PLACES=486, PETRI_TRANSITIONS=491} [2024-06-03 18:48:03,919 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 444 predicate places. [2024-06-03 18:48:03,919 INFO L495 AbstractCegarLoop]: Abstraction has has 486 places, 491 transitions, 5830 flow [2024-06-03 18:48:03,919 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.9) internal successors, (149), 10 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:48:03,919 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:48:03,919 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:48:03,919 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable222 [2024-06-03 18:48:03,919 INFO L420 AbstractCegarLoop]: === Iteration 224 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 18:48:03,919 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:48:03,919 INFO L85 PathProgramCache]: Analyzing trace with hash -934973555, now seen corresponding path program 13 times [2024-06-03 18:48:03,919 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:48:03,919 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1340817031] [2024-06-03 18:48:03,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:48:03,919 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:48:03,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:48:04,076 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:48:04,077 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:48:04,077 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1340817031] [2024-06-03 18:48:04,077 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1340817031] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:48:04,077 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:48:04,077 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 18:48:04,077 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [181868107] [2024-06-03 18:48:04,077 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:48:04,077 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 18:48:04,077 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:48:04,077 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 18:48:04,077 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-03 18:48:04,130 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 18:48:04,131 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 486 places, 491 transitions, 5830 flow. Second operand has 10 states, 10 states have (on average 14.9) internal successors, (149), 10 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:48:04,131 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:48:04,131 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 18:48:04,131 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:48:05,882 INFO L124 PetriNetUnfolderBase]: 4136/6952 cut-off events. [2024-06-03 18:48:05,882 INFO L125 PetriNetUnfolderBase]: For 1248911/1248923 co-relation queries the response was YES. [2024-06-03 18:48:05,942 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53063 conditions, 6952 events. 4136/6952 cut-off events. For 1248911/1248923 co-relation queries the response was YES. Maximal size of possible extension queue 560. Compared 49212 event pairs, 1294 based on Foata normal form. 38/6990 useless extension candidates. Maximal degree in co-relation 52860. Up to 6190 conditions per place. [2024-06-03 18:48:05,966 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 413 selfloop transitions, 89 changer transitions 12/520 dead transitions. [2024-06-03 18:48:05,966 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 491 places, 520 transitions, 6986 flow [2024-06-03 18:48:05,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-03 18:48:05,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-03 18:48:05,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 263 transitions. [2024-06-03 18:48:05,967 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49343339587242024 [2024-06-03 18:48:05,967 INFO L175 Difference]: Start difference. First operand has 486 places, 491 transitions, 5830 flow. Second operand 13 states and 263 transitions. [2024-06-03 18:48:05,967 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 491 places, 520 transitions, 6986 flow [2024-06-03 18:48:14,087 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 480 places, 520 transitions, 6765 flow, removed 2 selfloop flow, removed 11 redundant places. [2024-06-03 18:48:14,092 INFO L231 Difference]: Finished difference. Result has 481 places, 487 transitions, 5750 flow [2024-06-03 18:48:14,092 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5609, PETRI_DIFFERENCE_MINUEND_PLACES=468, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=491, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=89, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=402, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=5750, PETRI_PLACES=481, PETRI_TRANSITIONS=487} [2024-06-03 18:48:14,092 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 439 predicate places. [2024-06-03 18:48:14,092 INFO L495 AbstractCegarLoop]: Abstraction has has 481 places, 487 transitions, 5750 flow [2024-06-03 18:48:14,092 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.9) internal successors, (149), 10 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:48:14,092 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:48:14,093 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:48:14,093 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable223 [2024-06-03 18:48:14,093 INFO L420 AbstractCegarLoop]: === Iteration 225 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 18:48:14,093 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:48:14,093 INFO L85 PathProgramCache]: Analyzing trace with hash -939883955, now seen corresponding path program 14 times [2024-06-03 18:48:14,093 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:48:14,093 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1756108378] [2024-06-03 18:48:14,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:48:14,094 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:48:14,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:48:14,238 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:48:14,239 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:48:14,239 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1756108378] [2024-06-03 18:48:14,239 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1756108378] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:48:14,239 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:48:14,239 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 18:48:14,239 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1534345783] [2024-06-03 18:48:14,239 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:48:14,239 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 18:48:14,239 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:48:14,239 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 18:48:14,239 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-03 18:48:14,308 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 18:48:14,308 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 481 places, 487 transitions, 5750 flow. Second operand has 10 states, 10 states have (on average 14.9) internal successors, (149), 10 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:48:14,308 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:48:14,308 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 18:48:14,308 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:48:16,200 INFO L124 PetriNetUnfolderBase]: 4342/7318 cut-off events. [2024-06-03 18:48:16,200 INFO L125 PetriNetUnfolderBase]: For 1590165/1590177 co-relation queries the response was YES. [2024-06-03 18:48:16,266 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61108 conditions, 7318 events. 4342/7318 cut-off events. For 1590165/1590177 co-relation queries the response was YES. Maximal size of possible extension queue 580. Compared 52548 event pairs, 1349 based on Foata normal form. 30/7348 useless extension candidates. Maximal degree in co-relation 60906. Up to 6010 conditions per place. [2024-06-03 18:48:16,292 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 425 selfloop transitions, 91 changer transitions 8/530 dead transitions. [2024-06-03 18:48:16,292 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 491 places, 530 transitions, 7572 flow [2024-06-03 18:48:16,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-06-03 18:48:16,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-06-03 18:48:16,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 289 transitions. [2024-06-03 18:48:16,293 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5034843205574913 [2024-06-03 18:48:16,293 INFO L175 Difference]: Start difference. First operand has 481 places, 487 transitions, 5750 flow. Second operand 14 states and 289 transitions. [2024-06-03 18:48:16,293 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 491 places, 530 transitions, 7572 flow [2024-06-03 18:48:25,432 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 480 places, 530 transitions, 7388 flow, removed 3 selfloop flow, removed 11 redundant places. [2024-06-03 18:48:25,437 INFO L231 Difference]: Finished difference. Result has 481 places, 485 transitions, 5729 flow [2024-06-03 18:48:25,437 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5570, PETRI_DIFFERENCE_MINUEND_PLACES=467, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=487, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=91, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=396, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=5729, PETRI_PLACES=481, PETRI_TRANSITIONS=485} [2024-06-03 18:48:25,437 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 439 predicate places. [2024-06-03 18:48:25,437 INFO L495 AbstractCegarLoop]: Abstraction has has 481 places, 485 transitions, 5729 flow [2024-06-03 18:48:25,437 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.9) internal successors, (149), 10 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:48:25,437 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:48:25,437 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:48:25,437 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable224 [2024-06-03 18:48:25,437 INFO L420 AbstractCegarLoop]: === Iteration 226 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 18:48:25,438 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:48:25,438 INFO L85 PathProgramCache]: Analyzing trace with hash -935299985, now seen corresponding path program 15 times [2024-06-03 18:48:25,438 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:48:25,438 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [669456534] [2024-06-03 18:48:25,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:48:25,438 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:48:25,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:48:25,584 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:48:25,584 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:48:25,584 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [669456534] [2024-06-03 18:48:25,584 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [669456534] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:48:25,584 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:48:25,584 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 18:48:25,584 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [727726668] [2024-06-03 18:48:25,584 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:48:25,585 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 18:48:25,585 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:48:25,585 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 18:48:25,585 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-03 18:48:25,683 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 18:48:25,683 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 481 places, 485 transitions, 5729 flow. Second operand has 10 states, 10 states have (on average 14.9) internal successors, (149), 10 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:48:25,683 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:48:25,683 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 18:48:25,683 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:48:27,517 INFO L124 PetriNetUnfolderBase]: 4338/7304 cut-off events. [2024-06-03 18:48:27,517 INFO L125 PetriNetUnfolderBase]: For 1638495/1638507 co-relation queries the response was YES. [2024-06-03 18:48:27,584 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61170 conditions, 7304 events. 4338/7304 cut-off events. For 1638495/1638507 co-relation queries the response was YES. Maximal size of possible extension queue 579. Compared 52395 event pairs, 1409 based on Foata normal form. 36/7340 useless extension candidates. Maximal degree in co-relation 60968. Up to 6286 conditions per place. [2024-06-03 18:48:27,612 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 418 selfloop transitions, 86 changer transitions 11/521 dead transitions. [2024-06-03 18:48:27,612 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 491 places, 521 transitions, 7221 flow [2024-06-03 18:48:27,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-03 18:48:27,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-03 18:48:27,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 267 transitions. [2024-06-03 18:48:27,613 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.50093808630394 [2024-06-03 18:48:27,613 INFO L175 Difference]: Start difference. First operand has 481 places, 485 transitions, 5729 flow. Second operand 13 states and 267 transitions. [2024-06-03 18:48:27,613 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 491 places, 521 transitions, 7221 flow [2024-06-03 18:48:36,172 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 478 places, 521 transitions, 7035 flow, removed 3 selfloop flow, removed 13 redundant places. [2024-06-03 18:48:36,177 INFO L231 Difference]: Finished difference. Result has 479 places, 481 transitions, 5654 flow [2024-06-03 18:48:36,177 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5545, PETRI_DIFFERENCE_MINUEND_PLACES=466, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=485, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=86, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=399, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=5654, PETRI_PLACES=479, PETRI_TRANSITIONS=481} [2024-06-03 18:48:36,177 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 437 predicate places. [2024-06-03 18:48:36,177 INFO L495 AbstractCegarLoop]: Abstraction has has 479 places, 481 transitions, 5654 flow [2024-06-03 18:48:36,177 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.9) internal successors, (149), 10 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:48:36,177 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:48:36,178 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:48:36,178 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable225 [2024-06-03 18:48:36,178 INFO L420 AbstractCegarLoop]: === Iteration 227 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 18:48:36,178 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:48:36,178 INFO L85 PathProgramCache]: Analyzing trace with hash -939878375, now seen corresponding path program 16 times [2024-06-03 18:48:36,178 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:48:36,178 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2066276956] [2024-06-03 18:48:36,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:48:36,178 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:48:36,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:48:36,325 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:48:36,326 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:48:36,326 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2066276956] [2024-06-03 18:48:36,326 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2066276956] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:48:36,326 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:48:36,326 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 18:48:36,326 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2112430907] [2024-06-03 18:48:36,326 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:48:36,326 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 18:48:36,326 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:48:36,326 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 18:48:36,326 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-03 18:48:36,427 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 18:48:36,427 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 479 places, 481 transitions, 5654 flow. Second operand has 10 states, 10 states have (on average 14.9) internal successors, (149), 10 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:48:36,427 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:48:36,428 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 18:48:36,428 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:48:38,285 INFO L124 PetriNetUnfolderBase]: 4285/7209 cut-off events. [2024-06-03 18:48:38,285 INFO L125 PetriNetUnfolderBase]: For 1591667/1591679 co-relation queries the response was YES. [2024-06-03 18:48:38,349 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60537 conditions, 7209 events. 4285/7209 cut-off events. For 1591667/1591679 co-relation queries the response was YES. Maximal size of possible extension queue 569. Compared 51425 event pairs, 1399 based on Foata normal form. 30/7239 useless extension candidates. Maximal degree in co-relation 60336. Up to 6010 conditions per place. [2024-06-03 18:48:38,372 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 416 selfloop transitions, 85 changer transitions 13/520 dead transitions. [2024-06-03 18:48:38,372 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 489 places, 520 transitions, 7150 flow [2024-06-03 18:48:38,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-06-03 18:48:38,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-06-03 18:48:38,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 284 transitions. [2024-06-03 18:48:38,373 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49477351916376305 [2024-06-03 18:48:38,373 INFO L175 Difference]: Start difference. First operand has 479 places, 481 transitions, 5654 flow. Second operand 14 states and 284 transitions. [2024-06-03 18:48:38,373 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 489 places, 520 transitions, 7150 flow [2024-06-03 18:48:47,222 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 475 places, 520 transitions, 6964 flow, removed 6 selfloop flow, removed 14 redundant places. [2024-06-03 18:48:47,227 INFO L231 Difference]: Finished difference. Result has 476 places, 478 transitions, 5596 flow [2024-06-03 18:48:47,227 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5470, PETRI_DIFFERENCE_MINUEND_PLACES=462, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=481, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=85, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=396, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=5596, PETRI_PLACES=476, PETRI_TRANSITIONS=478} [2024-06-03 18:48:47,227 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 434 predicate places. [2024-06-03 18:48:47,227 INFO L495 AbstractCegarLoop]: Abstraction has has 476 places, 478 transitions, 5596 flow [2024-06-03 18:48:47,228 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.9) internal successors, (149), 10 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:48:47,228 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:48:47,228 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:48:47,228 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable226 [2024-06-03 18:48:47,228 INFO L420 AbstractCegarLoop]: === Iteration 228 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 18:48:47,228 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:48:47,228 INFO L85 PathProgramCache]: Analyzing trace with hash -929611175, now seen corresponding path program 17 times [2024-06-03 18:48:47,228 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:48:47,228 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1828058383] [2024-06-03 18:48:47,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:48:47,228 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:48:47,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:48:47,380 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:48:47,381 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:48:47,381 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1828058383] [2024-06-03 18:48:47,381 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1828058383] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:48:47,381 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:48:47,381 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 18:48:47,381 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [840901973] [2024-06-03 18:48:47,381 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:48:47,381 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 18:48:47,381 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:48:47,381 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 18:48:47,381 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-03 18:48:47,471 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 18:48:47,471 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 476 places, 478 transitions, 5596 flow. Second operand has 10 states, 10 states have (on average 14.9) internal successors, (149), 10 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:48:47,471 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:48:47,471 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 18:48:47,471 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:48:49,196 INFO L124 PetriNetUnfolderBase]: 4160/6996 cut-off events. [2024-06-03 18:48:49,196 INFO L125 PetriNetUnfolderBase]: For 1441630/1441642 co-relation queries the response was YES. [2024-06-03 18:48:49,255 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56049 conditions, 6996 events. 4160/6996 cut-off events. For 1441630/1441642 co-relation queries the response was YES. Maximal size of possible extension queue 554. Compared 49733 event pairs, 1358 based on Foata normal form. 38/7034 useless extension candidates. Maximal degree in co-relation 55850. Up to 6244 conditions per place. [2024-06-03 18:48:49,278 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 407 selfloop transitions, 81 changer transitions 12/506 dead transitions. [2024-06-03 18:48:49,279 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 483 places, 506 transitions, 6722 flow [2024-06-03 18:48:49,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-03 18:48:49,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-03 18:48:49,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 243 transitions. [2024-06-03 18:48:49,279 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49390243902439024 [2024-06-03 18:48:49,279 INFO L175 Difference]: Start difference. First operand has 476 places, 478 transitions, 5596 flow. Second operand 12 states and 243 transitions. [2024-06-03 18:48:49,279 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 483 places, 506 transitions, 6722 flow [2024-06-03 18:48:57,636 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 471 places, 506 transitions, 6551 flow, removed 3 selfloop flow, removed 12 redundant places. [2024-06-03 18:48:57,641 INFO L231 Difference]: Finished difference. Result has 472 places, 474 transitions, 5545 flow [2024-06-03 18:48:57,641 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5425, PETRI_DIFFERENCE_MINUEND_PLACES=460, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=478, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=81, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=397, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=5545, PETRI_PLACES=472, PETRI_TRANSITIONS=474} [2024-06-03 18:48:57,641 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 430 predicate places. [2024-06-03 18:48:57,641 INFO L495 AbstractCegarLoop]: Abstraction has has 472 places, 474 transitions, 5545 flow [2024-06-03 18:48:57,642 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.9) internal successors, (149), 10 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:48:57,642 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:48:57,642 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:48:57,642 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable227 [2024-06-03 18:48:57,642 INFO L420 AbstractCegarLoop]: === Iteration 229 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 18:48:57,642 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:48:57,642 INFO L85 PathProgramCache]: Analyzing trace with hash 243427207, now seen corresponding path program 18 times [2024-06-03 18:48:57,642 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:48:57,642 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [255677920] [2024-06-03 18:48:57,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:48:57,642 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:48:57,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:48:57,790 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:48:57,791 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:48:57,791 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [255677920] [2024-06-03 18:48:57,791 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [255677920] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:48:57,791 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:48:57,791 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 18:48:57,791 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1991116732] [2024-06-03 18:48:57,791 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:48:57,791 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 18:48:57,791 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:48:57,791 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 18:48:57,791 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-03 18:48:57,847 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 18:48:57,847 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 472 places, 474 transitions, 5545 flow. Second operand has 10 states, 10 states have (on average 14.9) internal successors, (149), 10 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:48:57,847 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:48:57,847 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 18:48:57,847 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:48:59,509 INFO L124 PetriNetUnfolderBase]: 4031/6787 cut-off events. [2024-06-03 18:48:59,509 INFO L125 PetriNetUnfolderBase]: For 1222962/1222974 co-relation queries the response was YES. [2024-06-03 18:48:59,568 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51778 conditions, 6787 events. 4031/6787 cut-off events. For 1222962/1222974 co-relation queries the response was YES. Maximal size of possible extension queue 542. Compared 47906 event pairs, 1234 based on Foata normal form. 36/6823 useless extension candidates. Maximal degree in co-relation 51580. Up to 6010 conditions per place. [2024-06-03 18:48:59,591 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 401 selfloop transitions, 76 changer transitions 23/506 dead transitions. [2024-06-03 18:48:59,591 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 479 places, 506 transitions, 6723 flow [2024-06-03 18:48:59,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-03 18:48:59,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-03 18:48:59,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 244 transitions. [2024-06-03 18:48:59,592 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4959349593495935 [2024-06-03 18:48:59,592 INFO L175 Difference]: Start difference. First operand has 472 places, 474 transitions, 5545 flow. Second operand 12 states and 244 transitions. [2024-06-03 18:48:59,592 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 479 places, 506 transitions, 6723 flow [2024-06-03 18:49:07,610 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 469 places, 506 transitions, 6559 flow, removed 1 selfloop flow, removed 10 redundant places. [2024-06-03 18:49:07,615 INFO L231 Difference]: Finished difference. Result has 470 places, 468 transitions, 5451 flow [2024-06-03 18:49:07,615 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5381, PETRI_DIFFERENCE_MINUEND_PLACES=458, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=474, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=398, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=5451, PETRI_PLACES=470, PETRI_TRANSITIONS=468} [2024-06-03 18:49:07,615 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 428 predicate places. [2024-06-03 18:49:07,615 INFO L495 AbstractCegarLoop]: Abstraction has has 470 places, 468 transitions, 5451 flow [2024-06-03 18:49:07,615 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.9) internal successors, (149), 10 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:49:07,615 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:49:07,616 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:49:07,616 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable228 [2024-06-03 18:49:07,616 INFO L420 AbstractCegarLoop]: === Iteration 230 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 18:49:07,616 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:49:07,616 INFO L85 PathProgramCache]: Analyzing trace with hash 1268887431, now seen corresponding path program 19 times [2024-06-03 18:49:07,616 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:49:07,616 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [215257862] [2024-06-03 18:49:07,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:49:07,616 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:49:07,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:49:07,762 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:49:07,762 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:49:07,762 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [215257862] [2024-06-03 18:49:07,762 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [215257862] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:49:07,762 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:49:07,763 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 18:49:07,763 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [477006065] [2024-06-03 18:49:07,763 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:49:07,763 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 18:49:07,763 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:49:07,763 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 18:49:07,763 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-03 18:49:07,829 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 18:49:07,829 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 470 places, 468 transitions, 5451 flow. Second operand has 10 states, 10 states have (on average 14.9) internal successors, (149), 10 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:49:07,829 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:49:07,829 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 18:49:07,829 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:49:09,567 INFO L124 PetriNetUnfolderBase]: 4120/6935 cut-off events. [2024-06-03 18:49:09,567 INFO L125 PetriNetUnfolderBase]: For 1441332/1441343 co-relation queries the response was YES. [2024-06-03 18:49:09,629 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55782 conditions, 6935 events. 4120/6935 cut-off events. For 1441332/1441343 co-relation queries the response was YES. Maximal size of possible extension queue 552. Compared 49216 event pairs, 1315 based on Foata normal form. 35/6970 useless extension candidates. Maximal degree in co-relation 55584. Up to 5935 conditions per place. [2024-06-03 18:49:09,654 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 393 selfloop transitions, 93 changer transitions 10/502 dead transitions. [2024-06-03 18:49:09,654 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 473 places, 502 transitions, 6899 flow [2024-06-03 18:49:09,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-06-03 18:49:09,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-06-03 18:49:09,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 282 transitions. [2024-06-03 18:49:09,655 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4912891986062718 [2024-06-03 18:49:09,655 INFO L175 Difference]: Start difference. First operand has 470 places, 468 transitions, 5451 flow. Second operand 14 states and 282 transitions. [2024-06-03 18:49:09,655 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 473 places, 502 transitions, 6899 flow [2024-06-03 18:49:18,806 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 463 places, 502 transitions, 6719 flow, removed 4 selfloop flow, removed 10 redundant places. [2024-06-03 18:49:18,811 INFO L231 Difference]: Finished difference. Result has 464 places, 465 transitions, 5411 flow [2024-06-03 18:49:18,812 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5273, PETRI_DIFFERENCE_MINUEND_PLACES=450, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=468, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=93, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=375, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=5411, PETRI_PLACES=464, PETRI_TRANSITIONS=465} [2024-06-03 18:49:18,812 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 422 predicate places. [2024-06-03 18:49:18,812 INFO L495 AbstractCegarLoop]: Abstraction has has 464 places, 465 transitions, 5411 flow [2024-06-03 18:49:18,812 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.9) internal successors, (149), 10 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:49:18,812 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:49:18,812 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:49:18,812 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable229 [2024-06-03 18:49:18,812 INFO L420 AbstractCegarLoop]: === Iteration 231 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 18:49:18,812 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:49:18,812 INFO L85 PathProgramCache]: Analyzing trace with hash -980149683, now seen corresponding path program 20 times [2024-06-03 18:49:18,812 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:49:18,812 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [848282506] [2024-06-03 18:49:18,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:49:18,813 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:49:18,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:49:18,957 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:49:18,958 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:49:18,958 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [848282506] [2024-06-03 18:49:18,958 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [848282506] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:49:18,958 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:49:18,958 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 18:49:18,958 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1124785856] [2024-06-03 18:49:18,958 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:49:18,958 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 18:49:18,958 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:49:18,958 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 18:49:18,958 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-03 18:49:19,040 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 18:49:19,041 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 464 places, 465 transitions, 5411 flow. Second operand has 10 states, 10 states have (on average 14.9) internal successors, (149), 10 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:49:19,041 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:49:19,041 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 18:49:19,041 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:49:20,944 INFO L124 PetriNetUnfolderBase]: 4550/7657 cut-off events. [2024-06-03 18:49:20,944 INFO L125 PetriNetUnfolderBase]: For 2216475/2216486 co-relation queries the response was YES. [2024-06-03 18:49:21,012 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72377 conditions, 7657 events. 4550/7657 cut-off events. For 2216475/2216486 co-relation queries the response was YES. Maximal size of possible extension queue 590. Compared 55284 event pairs, 1517 based on Foata normal form. 29/7686 useless extension candidates. Maximal degree in co-relation 72180. Up to 5317 conditions per place. [2024-06-03 18:49:21,039 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 398 selfloop transitions, 96 changer transitions 8/508 dead transitions. [2024-06-03 18:49:21,040 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 474 places, 508 transitions, 7231 flow [2024-06-03 18:49:21,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-03 18:49:21,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-03 18:49:21,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 275 transitions. [2024-06-03 18:49:21,041 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5159474671669794 [2024-06-03 18:49:21,041 INFO L175 Difference]: Start difference. First operand has 464 places, 465 transitions, 5411 flow. Second operand 13 states and 275 transitions. [2024-06-03 18:49:21,041 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 474 places, 508 transitions, 7231 flow [2024-06-03 18:49:30,802 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 462 places, 508 transitions, 7040 flow, removed 4 selfloop flow, removed 12 redundant places. [2024-06-03 18:49:30,807 INFO L231 Difference]: Finished difference. Result has 463 places, 463 transitions, 5396 flow [2024-06-03 18:49:30,807 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5224, PETRI_DIFFERENCE_MINUEND_PLACES=450, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=465, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=96, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=369, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=5396, PETRI_PLACES=463, PETRI_TRANSITIONS=463} [2024-06-03 18:49:30,807 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 421 predicate places. [2024-06-03 18:49:30,808 INFO L495 AbstractCegarLoop]: Abstraction has has 463 places, 463 transitions, 5396 flow [2024-06-03 18:49:30,808 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.9) internal successors, (149), 10 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:49:30,808 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:49:30,808 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:49:30,808 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable230 [2024-06-03 18:49:30,808 INFO L420 AbstractCegarLoop]: === Iteration 232 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 18:49:30,808 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:49:30,808 INFO L85 PathProgramCache]: Analyzing trace with hash 1770299277, now seen corresponding path program 21 times [2024-06-03 18:49:30,808 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:49:30,808 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1977345037] [2024-06-03 18:49:30,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:49:30,808 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:49:30,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:49:30,959 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:49:30,959 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:49:30,959 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1977345037] [2024-06-03 18:49:30,959 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1977345037] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:49:30,959 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:49:30,959 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 18:49:30,959 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1366561598] [2024-06-03 18:49:30,959 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:49:30,959 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 18:49:30,959 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:49:30,960 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 18:49:30,960 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-03 18:49:31,014 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 18:49:31,014 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 463 places, 463 transitions, 5396 flow. Second operand has 10 states, 10 states have (on average 14.9) internal successors, (149), 10 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:49:31,015 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:49:31,015 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 18:49:31,015 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:49:32,964 INFO L124 PetriNetUnfolderBase]: 4554/7677 cut-off events. [2024-06-03 18:49:32,964 INFO L125 PetriNetUnfolderBase]: For 2288001/2288012 co-relation queries the response was YES. [2024-06-03 18:49:33,034 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72609 conditions, 7677 events. 4554/7677 cut-off events. For 2288001/2288012 co-relation queries the response was YES. Maximal size of possible extension queue 598. Compared 55689 event pairs, 1685 based on Foata normal form. 37/7714 useless extension candidates. Maximal degree in co-relation 72412. Up to 6886 conditions per place. [2024-06-03 18:49:33,060 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 383 selfloop transitions, 89 changer transitions 12/490 dead transitions. [2024-06-03 18:49:33,060 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 474 places, 490 transitions, 6486 flow [2024-06-03 18:49:33,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-06-03 18:49:33,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-06-03 18:49:33,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 279 transitions. [2024-06-03 18:49:33,061 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48606271777003485 [2024-06-03 18:49:33,061 INFO L175 Difference]: Start difference. First operand has 463 places, 463 transitions, 5396 flow. Second operand 14 states and 279 transitions. [2024-06-03 18:49:33,061 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 474 places, 490 transitions, 6486 flow [2024-06-03 18:49:42,037 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 462 places, 490 transitions, 6293 flow, removed 2 selfloop flow, removed 12 redundant places. [2024-06-03 18:49:42,042 INFO L231 Difference]: Finished difference. Result has 463 places, 459 transitions, 5345 flow [2024-06-03 18:49:42,042 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5203, PETRI_DIFFERENCE_MINUEND_PLACES=449, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=463, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=89, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=374, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=5345, PETRI_PLACES=463, PETRI_TRANSITIONS=459} [2024-06-03 18:49:42,043 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 421 predicate places. [2024-06-03 18:49:42,043 INFO L495 AbstractCegarLoop]: Abstraction has has 463 places, 459 transitions, 5345 flow [2024-06-03 18:49:42,043 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.9) internal successors, (149), 10 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:49:42,043 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:49:42,043 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:49:42,043 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable231 [2024-06-03 18:49:42,043 INFO L420 AbstractCegarLoop]: === Iteration 233 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 18:49:42,043 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:49:42,043 INFO L85 PathProgramCache]: Analyzing trace with hash 1769972847, now seen corresponding path program 22 times [2024-06-03 18:49:42,043 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:49:42,043 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [789714659] [2024-06-03 18:49:42,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:49:42,043 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:49:42,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:49:42,189 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:49:42,189 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:49:42,189 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [789714659] [2024-06-03 18:49:42,189 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [789714659] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:49:42,189 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:49:42,190 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 18:49:42,190 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1691400329] [2024-06-03 18:49:42,190 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:49:42,190 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 18:49:42,190 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:49:42,190 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 18:49:42,190 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-03 18:49:42,285 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 18:49:42,285 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 463 places, 459 transitions, 5345 flow. Second operand has 10 states, 10 states have (on average 14.9) internal successors, (149), 10 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:49:42,285 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:49:42,285 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 18:49:42,286 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:49:44,074 INFO L124 PetriNetUnfolderBase]: 4298/7243 cut-off events. [2024-06-03 18:49:44,075 INFO L125 PetriNetUnfolderBase]: For 1851061/1851072 co-relation queries the response was YES. [2024-06-03 18:49:44,139 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63790 conditions, 7243 events. 4298/7243 cut-off events. For 1851061/1851072 co-relation queries the response was YES. Maximal size of possible extension queue 560. Compared 51815 event pairs, 1470 based on Foata normal form. 35/7278 useless extension candidates. Maximal degree in co-relation 63594. Up to 6025 conditions per place. [2024-06-03 18:49:44,165 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 390 selfloop transitions, 86 changer transitions 11/493 dead transitions. [2024-06-03 18:49:44,165 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 473 places, 493 transitions, 6775 flow [2024-06-03 18:49:44,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-06-03 18:49:44,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-06-03 18:49:44,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 283 transitions. [2024-06-03 18:49:44,166 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4930313588850174 [2024-06-03 18:49:44,166 INFO L175 Difference]: Start difference. First operand has 463 places, 459 transitions, 5345 flow. Second operand 14 states and 283 transitions. [2024-06-03 18:49:44,166 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 473 places, 493 transitions, 6775 flow [2024-06-03 18:49:52,241 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 461 places, 493 transitions, 6587 flow, removed 5 selfloop flow, removed 12 redundant places. [2024-06-03 18:49:52,246 INFO L231 Difference]: Finished difference. Result has 462 places, 455 transitions, 5270 flow [2024-06-03 18:49:52,246 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5159, PETRI_DIFFERENCE_MINUEND_PLACES=448, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=459, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=86, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=373, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=5270, PETRI_PLACES=462, PETRI_TRANSITIONS=455} [2024-06-03 18:49:52,246 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 420 predicate places. [2024-06-03 18:49:52,246 INFO L495 AbstractCegarLoop]: Abstraction has has 462 places, 455 transitions, 5270 flow [2024-06-03 18:49:52,246 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.9) internal successors, (149), 10 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:49:52,246 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:49:52,247 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:49:52,247 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable232 [2024-06-03 18:49:52,247 INFO L420 AbstractCegarLoop]: === Iteration 234 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 18:49:52,247 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:49:52,247 INFO L85 PathProgramCache]: Analyzing trace with hash 1002422929, now seen corresponding path program 23 times [2024-06-03 18:49:52,247 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:49:52,247 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [142537938] [2024-06-03 18:49:52,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:49:52,248 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:49:52,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:49:52,403 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:49:52,404 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:49:52,404 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [142537938] [2024-06-03 18:49:52,404 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [142537938] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:49:52,404 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:49:52,404 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 18:49:52,404 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1564038859] [2024-06-03 18:49:52,404 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:49:52,404 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 18:49:52,405 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:49:52,405 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 18:49:52,405 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-03 18:49:52,483 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 18:49:52,484 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 462 places, 455 transitions, 5270 flow. Second operand has 10 states, 10 states have (on average 14.9) internal successors, (149), 10 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:49:52,484 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:49:52,484 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 18:49:52,484 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:49:54,255 INFO L124 PetriNetUnfolderBase]: 4359/7348 cut-off events. [2024-06-03 18:49:54,255 INFO L125 PetriNetUnfolderBase]: For 1998291/1998302 co-relation queries the response was YES. [2024-06-03 18:49:54,322 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67262 conditions, 7348 events. 4359/7348 cut-off events. For 1998291/1998302 co-relation queries the response was YES. Maximal size of possible extension queue 563. Compared 52688 event pairs, 1468 based on Foata normal form. 29/7377 useless extension candidates. Maximal degree in co-relation 67066. Up to 5899 conditions per place. [2024-06-03 18:49:54,348 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 394 selfloop transitions, 88 changer transitions 8/496 dead transitions. [2024-06-03 18:49:54,348 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 473 places, 496 transitions, 7018 flow [2024-06-03 18:49:54,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-06-03 18:49:54,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2024-06-03 18:49:54,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 304 transitions. [2024-06-03 18:49:54,349 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4943089430894309 [2024-06-03 18:49:54,349 INFO L175 Difference]: Start difference. First operand has 462 places, 455 transitions, 5270 flow. Second operand 15 states and 304 transitions. [2024-06-03 18:49:54,349 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 473 places, 496 transitions, 7018 flow [2024-06-03 18:50:03,695 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 458 places, 496 transitions, 6832 flow, removed 7 selfloop flow, removed 15 redundant places. [2024-06-03 18:50:03,700 INFO L231 Difference]: Finished difference. Result has 459 places, 453 transitions, 5242 flow [2024-06-03 18:50:03,700 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5088, PETRI_DIFFERENCE_MINUEND_PLACES=444, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=455, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=367, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=5242, PETRI_PLACES=459, PETRI_TRANSITIONS=453} [2024-06-03 18:50:03,700 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 417 predicate places. [2024-06-03 18:50:03,700 INFO L495 AbstractCegarLoop]: Abstraction has has 459 places, 453 transitions, 5242 flow [2024-06-03 18:50:03,700 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.9) internal successors, (149), 10 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:50:03,700 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:50:03,701 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:50:03,701 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable233 [2024-06-03 18:50:03,701 INFO L420 AbstractCegarLoop]: === Iteration 235 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 18:50:03,701 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:50:03,701 INFO L85 PathProgramCache]: Analyzing trace with hash 250662715, now seen corresponding path program 24 times [2024-06-03 18:50:03,701 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:50:03,701 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1292796434] [2024-06-03 18:50:03,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:50:03,701 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:50:03,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:50:03,856 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:50:03,856 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:50:03,856 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1292796434] [2024-06-03 18:50:03,856 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1292796434] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:50:03,856 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:50:03,856 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 18:50:03,856 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [692129200] [2024-06-03 18:50:03,856 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:50:03,857 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 18:50:03,857 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:50:03,857 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 18:50:03,857 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-03 18:50:03,921 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 18:50:03,922 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 459 places, 453 transitions, 5242 flow. Second operand has 10 states, 10 states have (on average 14.9) internal successors, (149), 10 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:50:03,922 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:50:03,922 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 18:50:03,922 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:50:05,657 INFO L124 PetriNetUnfolderBase]: 4236/7135 cut-off events. [2024-06-03 18:50:05,657 INFO L125 PetriNetUnfolderBase]: For 1852686/1852697 co-relation queries the response was YES. [2024-06-03 18:50:05,722 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62896 conditions, 7135 events. 4236/7135 cut-off events. For 1852686/1852697 co-relation queries the response was YES. Maximal size of possible extension queue 549. Compared 50955 event pairs, 1499 based on Foata normal form. 37/7172 useless extension candidates. Maximal degree in co-relation 62702. Up to 6386 conditions per place. [2024-06-03 18:50:05,747 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 378 selfloop transitions, 81 changer transitions 14/479 dead transitions. [2024-06-03 18:50:05,747 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 469 places, 479 transitions, 6308 flow [2024-06-03 18:50:05,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-03 18:50:05,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-03 18:50:05,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 258 transitions. [2024-06-03 18:50:05,747 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48405253283302063 [2024-06-03 18:50:05,748 INFO L175 Difference]: Start difference. First operand has 459 places, 453 transitions, 5242 flow. Second operand 13 states and 258 transitions. [2024-06-03 18:50:05,748 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 469 places, 479 transitions, 6308 flow [2024-06-03 18:50:13,559 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 455 places, 479 transitions, 6130 flow, removed 2 selfloop flow, removed 14 redundant places. [2024-06-03 18:50:13,564 INFO L231 Difference]: Finished difference. Result has 456 places, 448 transitions, 5176 flow [2024-06-03 18:50:13,564 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5064, PETRI_DIFFERENCE_MINUEND_PLACES=443, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=453, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=81, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=372, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=5176, PETRI_PLACES=456, PETRI_TRANSITIONS=448} [2024-06-03 18:50:13,564 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 414 predicate places. [2024-06-03 18:50:13,564 INFO L495 AbstractCegarLoop]: Abstraction has has 456 places, 448 transitions, 5176 flow [2024-06-03 18:50:13,564 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.9) internal successors, (149), 10 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:50:13,564 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:50:13,564 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:50:13,564 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable234 [2024-06-03 18:50:13,564 INFO L420 AbstractCegarLoop]: === Iteration 236 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 18:50:13,565 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:50:13,565 INFO L85 PathProgramCache]: Analyzing trace with hash 944336059, now seen corresponding path program 25 times [2024-06-03 18:50:13,565 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:50:13,565 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [432049183] [2024-06-03 18:50:13,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:50:13,565 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:50:13,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:50:13,708 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:50:13,708 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:50:13,708 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [432049183] [2024-06-03 18:50:13,708 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [432049183] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:50:13,708 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:50:13,708 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 18:50:13,708 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1351897319] [2024-06-03 18:50:13,708 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:50:13,708 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 18:50:13,708 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:50:13,708 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 18:50:13,708 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-03 18:50:13,793 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 18:50:13,794 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 456 places, 448 transitions, 5176 flow. Second operand has 10 states, 10 states have (on average 14.9) internal successors, (149), 10 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:50:13,794 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:50:13,794 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 18:50:13,794 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:50:15,570 INFO L124 PetriNetUnfolderBase]: 4327/7306 cut-off events. [2024-06-03 18:50:15,570 INFO L125 PetriNetUnfolderBase]: For 1994496/1994507 co-relation queries the response was YES. [2024-06-03 18:50:15,635 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66979 conditions, 7306 events. 4327/7306 cut-off events. For 1994496/1994507 co-relation queries the response was YES. Maximal size of possible extension queue 560. Compared 52460 event pairs, 1440 based on Foata normal form. 29/7335 useless extension candidates. Maximal degree in co-relation 66786. Up to 5317 conditions per place. [2024-06-03 18:50:15,661 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 389 selfloop transitions, 82 changer transitions 13/490 dead transitions. [2024-06-03 18:50:15,661 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 462 places, 490 transitions, 6936 flow [2024-06-03 18:50:15,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-03 18:50:15,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-03 18:50:15,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 273 transitions. [2024-06-03 18:50:15,662 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5121951219512195 [2024-06-03 18:50:15,662 INFO L175 Difference]: Start difference. First operand has 456 places, 448 transitions, 5176 flow. Second operand 13 states and 273 transitions. [2024-06-03 18:50:15,662 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 462 places, 490 transitions, 6936 flow [2024-06-03 18:50:23,791 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 452 places, 490 transitions, 6762 flow, removed 6 selfloop flow, removed 10 redundant places. [2024-06-03 18:50:23,796 INFO L231 Difference]: Finished difference. Result has 453 places, 445 transitions, 5128 flow [2024-06-03 18:50:23,796 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5006, PETRI_DIFFERENCE_MINUEND_PLACES=440, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=448, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=366, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=5128, PETRI_PLACES=453, PETRI_TRANSITIONS=445} [2024-06-03 18:50:23,796 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 411 predicate places. [2024-06-03 18:50:23,796 INFO L495 AbstractCegarLoop]: Abstraction has has 453 places, 445 transitions, 5128 flow [2024-06-03 18:50:23,796 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.9) internal successors, (149), 10 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:50:23,796 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:50:23,796 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:50:23,797 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable235 [2024-06-03 18:50:23,797 INFO L420 AbstractCegarLoop]: === Iteration 237 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 18:50:23,797 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:50:23,797 INFO L85 PathProgramCache]: Analyzing trace with hash 161949085, now seen corresponding path program 26 times [2024-06-03 18:50:23,797 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:50:23,797 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [334515692] [2024-06-03 18:50:23,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:50:23,797 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:50:23,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:50:23,940 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:50:23,940 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:50:23,940 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [334515692] [2024-06-03 18:50:23,940 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [334515692] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:50:23,940 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:50:23,940 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 18:50:23,940 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [152298825] [2024-06-03 18:50:23,940 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:50:23,940 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 18:50:23,940 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:50:23,941 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 18:50:23,941 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-03 18:50:24,006 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 18:50:24,006 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 453 places, 445 transitions, 5128 flow. Second operand has 10 states, 10 states have (on average 14.9) internal successors, (149), 10 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:50:24,006 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:50:24,006 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 18:50:24,006 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:50:26,072 INFO L124 PetriNetUnfolderBase]: 4481/7576 cut-off events. [2024-06-03 18:50:26,072 INFO L125 PetriNetUnfolderBase]: For 2339287/2339298 co-relation queries the response was YES. [2024-06-03 18:50:26,143 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72867 conditions, 7576 events. 4481/7576 cut-off events. For 2339287/2339298 co-relation queries the response was YES. Maximal size of possible extension queue 577. Compared 54936 event pairs, 1666 based on Foata normal form. 35/7611 useless extension candidates. Maximal degree in co-relation 72674. Up to 6015 conditions per place. [2024-06-03 18:50:26,172 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 381 selfloop transitions, 78 changer transitions 17/482 dead transitions. [2024-06-03 18:50:26,172 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 461 places, 482 transitions, 6586 flow [2024-06-03 18:50:26,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-03 18:50:26,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-03 18:50:26,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 267 transitions. [2024-06-03 18:50:26,173 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.50093808630394 [2024-06-03 18:50:26,173 INFO L175 Difference]: Start difference. First operand has 453 places, 445 transitions, 5128 flow. Second operand 13 states and 267 transitions. [2024-06-03 18:50:26,173 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 461 places, 482 transitions, 6586 flow [2024-06-03 18:50:35,115 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 451 places, 482 transitions, 6414 flow, removed 5 selfloop flow, removed 10 redundant places. [2024-06-03 18:50:35,120 INFO L231 Difference]: Finished difference. Result has 452 places, 440 transitions, 5009 flow [2024-06-03 18:50:35,120 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4958, PETRI_DIFFERENCE_MINUEND_PLACES=439, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=445, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=367, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=5009, PETRI_PLACES=452, PETRI_TRANSITIONS=440} [2024-06-03 18:50:35,120 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 410 predicate places. [2024-06-03 18:50:35,120 INFO L495 AbstractCegarLoop]: Abstraction has has 452 places, 440 transitions, 5009 flow [2024-06-03 18:50:35,120 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.9) internal successors, (149), 10 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:50:35,120 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:50:35,120 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:50:35,121 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable236 [2024-06-03 18:50:35,121 INFO L420 AbstractCegarLoop]: === Iteration 238 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 18:50:35,121 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:50:35,121 INFO L85 PathProgramCache]: Analyzing trace with hash 278302901, now seen corresponding path program 27 times [2024-06-03 18:50:35,121 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:50:35,121 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1349831819] [2024-06-03 18:50:35,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:50:35,121 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:50:35,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:50:35,269 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:50:35,269 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:50:35,269 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1349831819] [2024-06-03 18:50:35,269 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1349831819] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:50:35,269 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:50:35,269 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 18:50:35,269 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [525307383] [2024-06-03 18:50:35,269 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:50:35,269 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 18:50:35,269 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:50:35,269 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 18:50:35,269 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-03 18:50:35,336 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 18:50:35,336 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 452 places, 440 transitions, 5009 flow. Second operand has 10 states, 10 states have (on average 14.9) internal successors, (149), 10 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:50:35,336 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:50:35,336 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 18:50:35,336 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:50:37,032 INFO L124 PetriNetUnfolderBase]: 4187/7068 cut-off events. [2024-06-03 18:50:37,032 INFO L125 PetriNetUnfolderBase]: For 1946274/1946285 co-relation queries the response was YES. [2024-06-03 18:50:37,094 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63563 conditions, 7068 events. 4187/7068 cut-off events. For 1946274/1946285 co-relation queries the response was YES. Maximal size of possible extension queue 540. Compared 50494 event pairs, 1533 based on Foata normal form. 37/7105 useless extension candidates. Maximal degree in co-relation 63370. Up to 6328 conditions per place. [2024-06-03 18:50:37,117 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 374 selfloop transitions, 74 changer transitions 12/466 dead transitions. [2024-06-03 18:50:37,117 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 459 places, 466 transitions, 6049 flow [2024-06-03 18:50:37,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-03 18:50:37,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-03 18:50:37,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 259 transitions. [2024-06-03 18:50:37,118 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48592870544090055 [2024-06-03 18:50:37,118 INFO L175 Difference]: Start difference. First operand has 452 places, 440 transitions, 5009 flow. Second operand 13 states and 259 transitions. [2024-06-03 18:50:37,118 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 459 places, 466 transitions, 6049 flow [2024-06-03 18:50:45,174 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 447 places, 466 transitions, 5888 flow, removed 5 selfloop flow, removed 12 redundant places. [2024-06-03 18:50:45,178 INFO L231 Difference]: Finished difference. Result has 448 places, 436 transitions, 4954 flow [2024-06-03 18:50:45,178 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4848, PETRI_DIFFERENCE_MINUEND_PLACES=435, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=440, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=366, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=4954, PETRI_PLACES=448, PETRI_TRANSITIONS=436} [2024-06-03 18:50:45,178 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 406 predicate places. [2024-06-03 18:50:45,179 INFO L495 AbstractCegarLoop]: Abstraction has has 448 places, 436 transitions, 4954 flow [2024-06-03 18:50:45,179 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.9) internal successors, (149), 10 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:50:45,179 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:50:45,179 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:50:45,179 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable237 [2024-06-03 18:50:45,179 INFO L420 AbstractCegarLoop]: === Iteration 239 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 18:50:45,179 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:50:45,179 INFO L85 PathProgramCache]: Analyzing trace with hash 268035701, now seen corresponding path program 28 times [2024-06-03 18:50:45,179 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:50:45,179 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [819337051] [2024-06-03 18:50:45,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:50:45,179 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:50:45,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:50:45,322 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:50:45,322 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:50:45,322 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [819337051] [2024-06-03 18:50:45,322 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [819337051] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:50:45,322 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:50:45,322 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 18:50:45,322 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [358921775] [2024-06-03 18:50:45,322 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:50:45,322 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 18:50:45,323 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:50:45,323 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 18:50:45,323 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-03 18:50:45,399 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 18:50:45,399 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 448 places, 436 transitions, 4954 flow. Second operand has 10 states, 10 states have (on average 14.9) internal successors, (149), 10 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:50:45,399 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:50:45,399 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 18:50:45,399 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:50:47,068 INFO L124 PetriNetUnfolderBase]: 4071/6876 cut-off events. [2024-06-03 18:50:47,068 INFO L125 PetriNetUnfolderBase]: For 1730480/1730491 co-relation queries the response was YES. [2024-06-03 18:50:47,127 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60170 conditions, 6876 events. 4071/6876 cut-off events. For 1730480/1730491 co-relation queries the response was YES. Maximal size of possible extension queue 525. Compared 48873 event pairs, 1418 based on Foata normal form. 29/6905 useless extension candidates. Maximal degree in co-relation 59978. Up to 5917 conditions per place. [2024-06-03 18:50:47,149 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 380 selfloop transitions, 73 changer transitions 13/472 dead transitions. [2024-06-03 18:50:47,149 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 457 places, 472 transitions, 6346 flow [2024-06-03 18:50:47,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-06-03 18:50:47,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-06-03 18:50:47,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 281 transitions. [2024-06-03 18:50:47,150 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4895470383275261 [2024-06-03 18:50:47,150 INFO L175 Difference]: Start difference. First operand has 448 places, 436 transitions, 4954 flow. Second operand 14 states and 281 transitions. [2024-06-03 18:50:47,150 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 457 places, 472 transitions, 6346 flow [2024-06-03 18:50:53,325 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 445 places, 472 transitions, 6134 flow, removed 5 selfloop flow, removed 12 redundant places. [2024-06-03 18:50:53,330 INFO L231 Difference]: Finished difference. Result has 446 places, 433 transitions, 4846 flow [2024-06-03 18:50:53,330 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4744, PETRI_DIFFERENCE_MINUEND_PLACES=432, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=436, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=73, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=363, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=4846, PETRI_PLACES=446, PETRI_TRANSITIONS=433} [2024-06-03 18:50:53,330 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 404 predicate places. [2024-06-03 18:50:53,330 INFO L495 AbstractCegarLoop]: Abstraction has has 446 places, 433 transitions, 4846 flow [2024-06-03 18:50:53,331 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.9) internal successors, (149), 10 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:50:53,331 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:50:53,331 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:50:53,331 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable238 [2024-06-03 18:50:53,331 INFO L420 AbstractCegarLoop]: === Iteration 240 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 18:50:53,331 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:50:53,331 INFO L85 PathProgramCache]: Analyzing trace with hash 951687709, now seen corresponding path program 29 times [2024-06-03 18:50:53,331 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:50:53,331 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1354714058] [2024-06-03 18:50:53,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:50:53,331 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:50:53,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:50:53,472 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:50:53,472 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:50:53,472 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1354714058] [2024-06-03 18:50:53,472 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1354714058] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:50:53,472 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:50:53,472 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 18:50:53,472 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [332487816] [2024-06-03 18:50:53,472 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:50:53,472 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 18:50:53,472 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:50:53,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 18:50:53,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-03 18:50:53,539 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 18:50:53,539 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 446 places, 433 transitions, 4846 flow. Second operand has 10 states, 10 states have (on average 14.9) internal successors, (149), 10 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:50:53,539 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:50:53,539 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 18:50:53,539 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 18:50:55,104 INFO L124 PetriNetUnfolderBase]: 4078/6881 cut-off events. [2024-06-03 18:50:55,105 INFO L125 PetriNetUnfolderBase]: For 1779179/1779190 co-relation queries the response was YES. [2024-06-03 18:50:55,164 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60893 conditions, 6881 events. 4078/6881 cut-off events. For 1779179/1779190 co-relation queries the response was YES. Maximal size of possible extension queue 527. Compared 48787 event pairs, 1367 based on Foata normal form. 29/6910 useless extension candidates. Maximal degree in co-relation 60702. Up to 5317 conditions per place. [2024-06-03 18:50:55,189 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 381 selfloop transitions, 74 changer transitions 14/475 dead transitions. [2024-06-03 18:50:55,189 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 454 places, 475 transitions, 6576 flow [2024-06-03 18:50:55,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-03 18:50:55,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-03 18:50:55,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 272 transitions. [2024-06-03 18:50:55,189 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5103189493433395 [2024-06-03 18:50:55,189 INFO L175 Difference]: Start difference. First operand has 446 places, 433 transitions, 4846 flow. Second operand 13 states and 272 transitions. [2024-06-03 18:50:55,189 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 454 places, 475 transitions, 6576 flow [2024-06-03 18:51:01,793 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 442 places, 475 transitions, 6420 flow, removed 6 selfloop flow, removed 12 redundant places. [2024-06-03 18:51:01,798 INFO L231 Difference]: Finished difference. Result has 443 places, 429 transitions, 4768 flow [2024-06-03 18:51:01,798 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4694, PETRI_DIFFERENCE_MINUEND_PLACES=430, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=433, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=359, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=4768, PETRI_PLACES=443, PETRI_TRANSITIONS=429} [2024-06-03 18:51:01,798 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 401 predicate places. [2024-06-03 18:51:01,798 INFO L495 AbstractCegarLoop]: Abstraction has has 443 places, 429 transitions, 4768 flow [2024-06-03 18:51:01,798 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.9) internal successors, (149), 10 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:51:01,798 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 18:51:01,798 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 18:51:01,798 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable239 [2024-06-03 18:51:01,798 INFO L420 AbstractCegarLoop]: === Iteration 241 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 18:51:01,799 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 18:51:01,799 INFO L85 PathProgramCache]: Analyzing trace with hash 1775513787, now seen corresponding path program 30 times [2024-06-03 18:51:01,799 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 18:51:01,799 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [144525512] [2024-06-03 18:51:01,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 18:51:01,799 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 18:51:01,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 18:51:01,944 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 18:51:01,945 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 18:51:01,945 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [144525512] [2024-06-03 18:51:01,945 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [144525512] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 18:51:01,945 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 18:51:01,945 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 18:51:01,945 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [370645604] [2024-06-03 18:51:01,945 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 18:51:01,945 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 18:51:01,945 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 18:51:01,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 18:51:01,945 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-03 18:51:02,010 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 18:51:02,010 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 443 places, 429 transitions, 4768 flow. Second operand has 10 states, 10 states have (on average 14.9) internal successors, (149), 10 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 18:51:02,010 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 18:51:02,010 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 18:51:02,010 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand Killed by 15