./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/mix025_pso.opt_rmo.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/mix025_pso.opt_rmo.opt.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 76401ed0 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/mix025_pso.opt_rmo.opt.i ./goblint.2024-05-21_14-57-05.files/protection/mix025_pso.opt_rmo.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-76401ed-m [2024-06-20 16:04:20,899 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-20 16:04:20,935 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-20 16:04:20,938 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-20 16:04:20,938 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-20 16:04:20,957 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-20 16:04:20,957 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-20 16:04:20,958 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-20 16:04:20,958 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-20 16:04:20,959 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-20 16:04:20,959 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-20 16:04:20,959 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-20 16:04:20,960 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-20 16:04:20,960 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-20 16:04:20,961 INFO L153 SettingsManager]: * Use SBE=true [2024-06-20 16:04:20,961 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-20 16:04:20,961 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-20 16:04:20,962 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-20 16:04:20,962 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-20 16:04:20,962 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-20 16:04:20,963 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-20 16:04:20,966 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-20 16:04:20,966 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-20 16:04:20,966 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-20 16:04:20,966 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-20 16:04:20,966 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-20 16:04:20,966 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-20 16:04:20,967 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-20 16:04:20,967 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-20 16:04:20,967 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-20 16:04:20,967 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-20 16:04:20,967 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-20 16:04:20,968 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-20 16:04:20,968 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-20 16:04:20,968 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-20 16:04:20,968 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-20 16:04:20,968 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-20 16:04:20,969 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-20 16:04:20,969 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-20 16:04:20,969 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-20 16:04:20,969 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-20 16:04:20,972 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-20 16:04:20,972 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-20 16:04:20,972 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-20 16:04:21,204 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-20 16:04:21,218 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-20 16:04:21,220 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-20 16:04:21,221 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-20 16:04:21,222 INFO L274 PluginConnector]: CDTParser initialized [2024-06-20 16:04:21,222 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/mix025_pso.opt_rmo.opt.i [2024-06-20 16:04:22,126 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-20 16:04:22,373 INFO L384 CDTParser]: Found 1 translation units. [2024-06-20 16:04:22,374 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/mix025_pso.opt_rmo.opt.i [2024-06-20 16:04:22,387 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d95b96afb/ff4b6343a0f646378a42930bd339c980/FLAGce83cedea [2024-06-20 16:04:22,396 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d95b96afb/ff4b6343a0f646378a42930bd339c980 [2024-06-20 16:04:22,398 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-20 16:04:22,399 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-20 16:04:22,399 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-05-21_14-57-05.files/protection/mix025_pso.opt_rmo.opt.yml/witness.yml [2024-06-20 16:04:22,527 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-20 16:04:22,529 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-20 16:04:22,529 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-20 16:04:22,530 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-20 16:04:22,533 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-20 16:04:22,534 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.06 04:04:22" (1/2) ... [2024-06-20 16:04:22,534 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@214f8cbb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 04:04:22, skipping insertion in model container [2024-06-20 16:04:22,535 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.06 04:04:22" (1/2) ... [2024-06-20 16:04:22,536 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@51312b92 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 04:04:22, skipping insertion in model container [2024-06-20 16:04:22,536 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 20.06 04:04:22" (2/2) ... [2024-06-20 16:04:22,536 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@214f8cbb and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 04:04:22, skipping insertion in model container [2024-06-20 16:04:22,536 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 20.06 04:04:22" (2/2) ... [2024-06-20 16:04:22,536 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-20 16:04:22,602 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-20 16:04:22,603 INFO L97 edCorrectnessWitness]: Location invariant before [L839-L839] ((((((((((((((((((! multithreaded || (((0 <= y && y <= 2) && y <= 127) && ((y == 0 || y == 1) || y == 2))) && (! multithreaded || ((0 <= x$mem_tmp && x$mem_tmp <= 1) && (x$mem_tmp == 0 || x$mem_tmp == 1)))) && (! multithreaded || x$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || x$read_delayed_var == 0)) && (! multithreaded || (((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 2) && __unbuffered_p2_EAX <= 127) && ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2)))) && (! multithreaded || x$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 1) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)))) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1)))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || x$flush_delayed == (_Bool)0)) && (! multithreaded || ((0 <= z && z <= 1) && (z == 0 || z == 1)))) && (! multithreaded || ((0 <= x$w_buff1 && x$w_buff1 <= 1) && (x$w_buff1 == 0 || x$w_buff1 == 1)))) && (! multithreaded || ((0 <= __unbuffered_p2_EBX && __unbuffered_p2_EBX <= 1) && (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1)))) && (! multithreaded || x$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || x$read_delayed == (_Bool)0)) && (! multithreaded || x$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || ((0 <= x$w_buff0 && x$w_buff0 <= 1) && (x$w_buff0 == 0 || x$w_buff0 == 1))) [2024-06-20 16:04:22,603 INFO L97 edCorrectnessWitness]: Location invariant before [L837-L837] ((((((((((((((((((! multithreaded || (((0 <= y && y <= 2) && y <= 127) && ((y == 0 || y == 1) || y == 2))) && (! multithreaded || ((0 <= x$mem_tmp && x$mem_tmp <= 1) && (x$mem_tmp == 0 || x$mem_tmp == 1)))) && (! multithreaded || x$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || x$read_delayed_var == 0)) && (! multithreaded || (((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 2) && __unbuffered_p2_EAX <= 127) && ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2)))) && (! multithreaded || x$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 1) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)))) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1)))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || x$flush_delayed == (_Bool)0)) && (! multithreaded || ((0 <= z && z <= 1) && (z == 0 || z == 1)))) && (! multithreaded || ((0 <= x$w_buff1 && x$w_buff1 <= 1) && (x$w_buff1 == 0 || x$w_buff1 == 1)))) && (! multithreaded || ((0 <= __unbuffered_p2_EBX && __unbuffered_p2_EBX <= 1) && (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1)))) && (! multithreaded || x$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || x$read_delayed == (_Bool)0)) && (! multithreaded || x$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || ((0 <= x$w_buff0 && x$w_buff0 <= 1) && (x$w_buff0 == 0 || x$w_buff0 == 1))) [2024-06-20 16:04:22,603 INFO L97 edCorrectnessWitness]: Location invariant before [L840-L840] ((((((((((((((((((! multithreaded || (((0 <= y && y <= 2) && y <= 127) && ((y == 0 || y == 1) || y == 2))) && (! multithreaded || ((0 <= x$mem_tmp && x$mem_tmp <= 1) && (x$mem_tmp == 0 || x$mem_tmp == 1)))) && (! multithreaded || x$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || x$read_delayed_var == 0)) && (! multithreaded || (((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 2) && __unbuffered_p2_EAX <= 127) && ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2)))) && (! multithreaded || x$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 1) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)))) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1)))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || x$flush_delayed == (_Bool)0)) && (! multithreaded || ((0 <= z && z <= 1) && (z == 0 || z == 1)))) && (! multithreaded || ((0 <= x$w_buff1 && x$w_buff1 <= 1) && (x$w_buff1 == 0 || x$w_buff1 == 1)))) && (! multithreaded || ((0 <= __unbuffered_p2_EBX && __unbuffered_p2_EBX <= 1) && (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1)))) && (! multithreaded || x$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || x$read_delayed == (_Bool)0)) && (! multithreaded || x$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || ((0 <= x$w_buff0 && x$w_buff0 <= 1) && (x$w_buff0 == 0 || x$w_buff0 == 1))) [2024-06-20 16:04:22,604 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-20 16:04:22,604 INFO L106 edCorrectnessWitness]: ghost_update [L835-L835] multithreaded = 1; [2024-06-20 16:04:22,642 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-20 16:04:22,949 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-20 16:04:22,958 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-20 16:04:23,075 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-20 16:04:23,105 INFO L206 MainTranslator]: Completed translation [2024-06-20 16:04:23,105 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 04:04:23 WrapperNode [2024-06-20 16:04:23,106 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-20 16:04:23,106 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-20 16:04:23,107 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-20 16:04:23,107 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-20 16:04:23,112 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 20.06 04:04:23" (1/1) ... [2024-06-20 16:04:23,128 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 20.06 04:04:23" (1/1) ... [2024-06-20 16:04:23,152 INFO L138 Inliner]: procedures = 175, calls = 45, calls flagged for inlining = 6, calls inlined = 7, statements flattened = 126 [2024-06-20 16:04:23,153 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-20 16:04:23,154 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-20 16:04:23,154 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-20 16:04:23,154 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-20 16:04:23,162 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 04:04:23" (1/1) ... [2024-06-20 16:04:23,163 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 04:04:23" (1/1) ... [2024-06-20 16:04:23,166 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 04:04:23" (1/1) ... [2024-06-20 16:04:23,179 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]. [2024-06-20 16:04:23,180 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 04:04:23" (1/1) ... [2024-06-20 16:04:23,180 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 04:04:23" (1/1) ... [2024-06-20 16:04:23,187 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 04:04:23" (1/1) ... [2024-06-20 16:04:23,188 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 04:04:23" (1/1) ... [2024-06-20 16:04:23,190 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 04:04:23" (1/1) ... [2024-06-20 16:04:23,191 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 04:04:23" (1/1) ... [2024-06-20 16:04:23,194 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-20 16:04:23,195 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-20 16:04:23,195 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-20 16:04:23,195 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-20 16:04:23,195 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 04:04:23" (1/1) ... [2024-06-20 16:04:23,199 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-20 16:04:23,205 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-20 16:04:23,237 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) [2024-06-20 16:04:23,255 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 [2024-06-20 16:04:23,312 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-20 16:04:23,313 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-20 16:04:23,313 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-20 16:04:23,313 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-20 16:04:23,313 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-20 16:04:23,313 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-20 16:04:23,313 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-20 16:04:23,314 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-20 16:04:23,314 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-20 16:04:23,314 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-20 16:04:23,314 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-20 16:04:23,315 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-20 16:04:23,316 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-20 16:04:23,442 INFO L244 CfgBuilder]: Building ICFG [2024-06-20 16:04:23,444 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-20 16:04:23,780 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-20 16:04:23,781 INFO L293 CfgBuilder]: Performing block encoding [2024-06-20 16:04:23,920 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-20 16:04:23,921 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-20 16:04:23,922 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.06 04:04:23 BoogieIcfgContainer [2024-06-20 16:04:23,922 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-20 16:04:23,924 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-20 16:04:23,924 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-20 16:04:23,927 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-20 16:04:23,927 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.06 04:04:22" (1/4) ... [2024-06-20 16:04:23,928 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@504a7fe3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.06 04:04:23, skipping insertion in model container [2024-06-20 16:04:23,928 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 20.06 04:04:22" (2/4) ... [2024-06-20 16:04:23,928 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@504a7fe3 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 20.06 04:04:23, skipping insertion in model container [2024-06-20 16:04:23,928 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 04:04:23" (3/4) ... [2024-06-20 16:04:23,929 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@504a7fe3 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 20.06 04:04:23, skipping insertion in model container [2024-06-20 16:04:23,929 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.06 04:04:23" (4/4) ... [2024-06-20 16:04:23,930 INFO L112 eAbstractionObserver]: Analyzing ICFG mix025_pso.opt_rmo.opt.i [2024-06-20 16:04:23,942 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-20 16:04:23,942 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2024-06-20 16:04:23,943 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-20 16:04:23,982 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-20 16:04:24,009 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 51 places, 41 transitions, 94 flow [2024-06-20 16:04:24,035 INFO L124 PetriNetUnfolderBase]: 0/38 cut-off events. [2024-06-20 16:04:24,036 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-20 16:04:24,037 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 59 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. [2024-06-20 16:04:24,065 INFO L82 GeneralOperation]: Start removeDead. Operand has 51 places, 41 transitions, 94 flow [2024-06-20 16:04:24,069 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 42 places, 32 transitions, 73 flow [2024-06-20 16:04:24,078 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-20 16:04:24,083 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;@15f7c4c4, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-20 16:04:24,083 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2024-06-20 16:04:24,088 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-20 16:04:24,089 INFO L124 PetriNetUnfolderBase]: 0/5 cut-off events. [2024-06-20 16:04:24,089 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-20 16:04:24,089 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:04:24,089 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-06-20 16:04:24,090 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)] === [2024-06-20 16:04:24,093 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:04:24,094 INFO L85 PathProgramCache]: Analyzing trace with hash 362366708, now seen corresponding path program 1 times [2024-06-20 16:04:24,102 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:04:24,102 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1398100051] [2024-06-20 16:04:24,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:04:24,103 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:04:24,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:04:25,030 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:04:25,030 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:04:25,031 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1398100051] [2024-06-20 16:04:25,031 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1398100051] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:04:25,031 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:04:25,032 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-20 16:04:25,033 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1267152075] [2024-06-20 16:04:25,034 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:04:25,044 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-20 16:04:25,047 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:04:25,071 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-20 16:04:25,071 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-20 16:04:25,101 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-20 16:04:25,103 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 32 transitions, 73 flow. Second operand has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:04:25,103 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:04:25,103 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-20 16:04:25,104 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:04:25,432 INFO L124 PetriNetUnfolderBase]: 1152/1852 cut-off events. [2024-06-20 16:04:25,432 INFO L125 PetriNetUnfolderBase]: For 34/34 co-relation queries the response was YES. [2024-06-20 16:04:25,438 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3669 conditions, 1852 events. 1152/1852 cut-off events. For 34/34 co-relation queries the response was YES. Maximal size of possible extension queue 87. Compared 9237 event pairs, 785 based on Foata normal form. 1/1778 useless extension candidates. Maximal degree in co-relation 3657. Up to 1732 conditions per place. [2024-06-20 16:04:25,446 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 31 selfloop transitions, 4 changer transitions 0/42 dead transitions. [2024-06-20 16:04:25,446 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 42 transitions, 169 flow [2024-06-20 16:04:25,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-20 16:04:25,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-20 16:04:25,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 77 transitions. [2024-06-20 16:04:25,456 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6260162601626016 [2024-06-20 16:04:25,457 INFO L175 Difference]: Start difference. First operand has 42 places, 32 transitions, 73 flow. Second operand 3 states and 77 transitions. [2024-06-20 16:04:25,458 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 42 transitions, 169 flow [2024-06-20 16:04:25,460 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 42 transitions, 164 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-20 16:04:25,462 INFO L231 Difference]: Finished difference. Result has 42 places, 35 transitions, 100 flow [2024-06-20 16:04:25,464 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} [2024-06-20 16:04:25,466 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 0 predicate places. [2024-06-20 16:04:25,467 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 35 transitions, 100 flow [2024-06-20 16:04:25,467 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:04:25,467 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:04:25,467 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:04:25,467 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-20 16:04:25,468 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)] === [2024-06-20 16:04:25,468 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:04:25,469 INFO L85 PathProgramCache]: Analyzing trace with hash 342093779, now seen corresponding path program 1 times [2024-06-20 16:04:25,469 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:04:25,469 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2067270659] [2024-06-20 16:04:25,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:04:25,469 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:04:25,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:04:26,099 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:04:26,099 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:04:26,099 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2067270659] [2024-06-20 16:04:26,099 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2067270659] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:04:26,100 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:04:26,100 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-20 16:04:26,100 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [432744867] [2024-06-20 16:04:26,100 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:04:26,102 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-20 16:04:26,103 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:04:26,103 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-20 16:04:26,103 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-20 16:04:26,136 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 41 [2024-06-20 16:04:26,137 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 35 transitions, 100 flow. Second operand has 4 states, 4 states have (on average 13.25) internal successors, (53), 4 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:04:26,137 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:04:26,137 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 41 [2024-06-20 16:04:26,137 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:04:26,421 INFO L124 PetriNetUnfolderBase]: 1347/2081 cut-off events. [2024-06-20 16:04:26,421 INFO L125 PetriNetUnfolderBase]: For 396/396 co-relation queries the response was YES. [2024-06-20 16:04:26,425 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4722 conditions, 2081 events. 1347/2081 cut-off events. For 396/396 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 10036 event pairs, 649 based on Foata normal form. 6/2076 useless extension candidates. Maximal degree in co-relation 4710. Up to 1981 conditions per place. [2024-06-20 16:04:26,433 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 40 selfloop transitions, 7 changer transitions 0/53 dead transitions. [2024-06-20 16:04:26,433 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 53 transitions, 242 flow [2024-06-20 16:04:26,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-20 16:04:26,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-20 16:04:26,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 98 transitions. [2024-06-20 16:04:26,435 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5975609756097561 [2024-06-20 16:04:26,435 INFO L175 Difference]: Start difference. First operand has 42 places, 35 transitions, 100 flow. Second operand 4 states and 98 transitions. [2024-06-20 16:04:26,435 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 53 transitions, 242 flow [2024-06-20 16:04:26,436 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 53 transitions, 238 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-20 16:04:26,436 INFO L231 Difference]: Finished difference. Result has 45 places, 38 transitions, 136 flow [2024-06-20 16:04:26,437 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=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=136, PETRI_PLACES=45, PETRI_TRANSITIONS=38} [2024-06-20 16:04:26,437 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 3 predicate places. [2024-06-20 16:04:26,437 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 38 transitions, 136 flow [2024-06-20 16:04:26,438 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.25) internal successors, (53), 4 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:04:26,438 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:04:26,438 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:04:26,438 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-20 16:04:26,438 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)] === [2024-06-20 16:04:26,439 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:04:26,439 INFO L85 PathProgramCache]: Analyzing trace with hash -640371016, now seen corresponding path program 1 times [2024-06-20 16:04:26,439 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:04:26,439 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1718632312] [2024-06-20 16:04:26,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:04:26,439 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:04:26,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:04:27,330 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:04:27,331 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:04:27,331 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1718632312] [2024-06-20 16:04:27,331 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1718632312] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:04:27,331 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:04:27,331 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-20 16:04:27,332 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1252052482] [2024-06-20 16:04:27,332 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:04:27,332 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-20 16:04:27,332 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:04:27,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-20 16:04:27,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-06-20 16:04:27,392 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 41 [2024-06-20 16:04:27,393 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 38 transitions, 136 flow. Second operand has 6 states, 6 states have (on average 13.166666666666666) internal successors, (79), 6 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:04:27,393 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:04:27,393 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 41 [2024-06-20 16:04:27,394 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:04:27,768 INFO L124 PetriNetUnfolderBase]: 1338/2066 cut-off events. [2024-06-20 16:04:27,769 INFO L125 PetriNetUnfolderBase]: For 1107/1107 co-relation queries the response was YES. [2024-06-20 16:04:27,771 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5215 conditions, 2066 events. 1338/2066 cut-off events. For 1107/1107 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 9949 event pairs, 485 based on Foata normal form. 6/2061 useless extension candidates. Maximal degree in co-relation 5201. Up to 1936 conditions per place. [2024-06-20 16:04:27,779 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 50 selfloop transitions, 12 changer transitions 0/68 dead transitions. [2024-06-20 16:04:27,780 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 68 transitions, 348 flow [2024-06-20 16:04:27,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 16:04:27,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 16:04:27,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 137 transitions. [2024-06-20 16:04:27,784 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.556910569105691 [2024-06-20 16:04:27,784 INFO L175 Difference]: Start difference. First operand has 45 places, 38 transitions, 136 flow. Second operand 6 states and 137 transitions. [2024-06-20 16:04:27,785 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 68 transitions, 348 flow [2024-06-20 16:04:27,786 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 68 transitions, 328 flow, removed 4 selfloop flow, removed 2 redundant places. [2024-06-20 16:04:27,788 INFO L231 Difference]: Finished difference. Result has 49 places, 42 transitions, 179 flow [2024-06-20 16:04:27,788 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=116, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=179, PETRI_PLACES=49, PETRI_TRANSITIONS=42} [2024-06-20 16:04:27,789 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 7 predicate places. [2024-06-20 16:04:27,789 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 42 transitions, 179 flow [2024-06-20 16:04:27,789 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.166666666666666) internal successors, (79), 6 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:04:27,789 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:04:27,789 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:04:27,790 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-20 16:04:27,790 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)] === [2024-06-20 16:04:27,790 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:04:27,790 INFO L85 PathProgramCache]: Analyzing trace with hash -1396552970, now seen corresponding path program 1 times [2024-06-20 16:04:27,790 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:04:27,791 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1433058830] [2024-06-20 16:04:27,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:04:27,791 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:04:27,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:04:28,402 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:04:28,403 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:04:28,405 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1433058830] [2024-06-20 16:04:28,405 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1433058830] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:04:28,406 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:04:28,406 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-20 16:04:28,406 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1625041253] [2024-06-20 16:04:28,406 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:04:28,407 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-20 16:04:28,407 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:04:28,408 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-20 16:04:28,408 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-20 16:04:28,476 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 41 [2024-06-20 16:04:28,477 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 42 transitions, 179 flow. Second operand has 6 states, 6 states have (on average 12.5) internal successors, (75), 6 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:04:28,477 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:04:28,478 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 41 [2024-06-20 16:04:28,478 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:04:28,749 INFO L124 PetriNetUnfolderBase]: 1126/1832 cut-off events. [2024-06-20 16:04:28,749 INFO L125 PetriNetUnfolderBase]: For 1768/1768 co-relation queries the response was YES. [2024-06-20 16:04:28,752 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5000 conditions, 1832 events. 1126/1832 cut-off events. For 1768/1768 co-relation queries the response was YES. Maximal size of possible extension queue 88. Compared 9199 event pairs, 487 based on Foata normal form. 2/1803 useless extension candidates. Maximal degree in co-relation 4983. Up to 1683 conditions per place. [2024-06-20 16:04:28,758 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 42 selfloop transitions, 8 changer transitions 0/56 dead transitions. [2024-06-20 16:04:28,758 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 56 transitions, 321 flow [2024-06-20 16:04:28,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-20 16:04:28,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-20 16:04:28,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 99 transitions. [2024-06-20 16:04:28,760 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48292682926829267 [2024-06-20 16:04:28,760 INFO L175 Difference]: Start difference. First operand has 49 places, 42 transitions, 179 flow. Second operand 5 states and 99 transitions. [2024-06-20 16:04:28,760 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 56 transitions, 321 flow [2024-06-20 16:04:28,763 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 56 transitions, 294 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-06-20 16:04:28,765 INFO L231 Difference]: Finished difference. Result has 51 places, 45 transitions, 196 flow [2024-06-20 16:04:28,765 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=152, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=196, PETRI_PLACES=51, PETRI_TRANSITIONS=45} [2024-06-20 16:04:28,766 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 9 predicate places. [2024-06-20 16:04:28,766 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 45 transitions, 196 flow [2024-06-20 16:04:28,766 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.5) internal successors, (75), 6 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:04:28,766 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:04:28,767 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:04:28,767 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-20 16:04:28,767 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)] === [2024-06-20 16:04:28,767 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:04:28,767 INFO L85 PathProgramCache]: Analyzing trace with hash -317550184, now seen corresponding path program 1 times [2024-06-20 16:04:28,767 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:04:28,768 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [456874786] [2024-06-20 16:04:28,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:04:28,768 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:04:28,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:04:29,369 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:04:29,369 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:04:29,370 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [456874786] [2024-06-20 16:04:29,370 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [456874786] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:04:29,370 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:04:29,370 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 16:04:29,370 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [182574896] [2024-06-20 16:04:29,370 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:04:29,371 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 16:04:29,371 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:04:29,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 16:04:29,372 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-20 16:04:29,422 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 16:04:29,422 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 45 transitions, 196 flow. Second operand has 7 states, 7 states have (on average 11.428571428571429) internal successors, (80), 7 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:04:29,422 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:04:29,423 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 16:04:29,423 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:04:29,751 INFO L124 PetriNetUnfolderBase]: 1335/2073 cut-off events. [2024-06-20 16:04:29,751 INFO L125 PetriNetUnfolderBase]: For 3047/3047 co-relation queries the response was YES. [2024-06-20 16:04:29,755 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6181 conditions, 2073 events. 1335/2073 cut-off events. For 3047/3047 co-relation queries the response was YES. Maximal size of possible extension queue 98. Compared 10000 event pairs, 569 based on Foata normal form. 3/2075 useless extension candidates. Maximal degree in co-relation 6162. Up to 1955 conditions per place. [2024-06-20 16:04:29,763 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 51 selfloop transitions, 17 changer transitions 0/73 dead transitions. [2024-06-20 16:04:29,763 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 73 transitions, 440 flow [2024-06-20 16:04:29,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 16:04:29,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 16:04:29,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 118 transitions. [2024-06-20 16:04:29,764 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4796747967479675 [2024-06-20 16:04:29,764 INFO L175 Difference]: Start difference. First operand has 51 places, 45 transitions, 196 flow. Second operand 6 states and 118 transitions. [2024-06-20 16:04:29,764 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 73 transitions, 440 flow [2024-06-20 16:04:29,768 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 73 transitions, 420 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-06-20 16:04:29,771 INFO L231 Difference]: Finished difference. Result has 56 places, 56 transitions, 297 flow [2024-06-20 16:04:29,771 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=176, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=297, PETRI_PLACES=56, PETRI_TRANSITIONS=56} [2024-06-20 16:04:29,773 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 14 predicate places. [2024-06-20 16:04:29,773 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 56 transitions, 297 flow [2024-06-20 16:04:29,774 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.428571428571429) internal successors, (80), 7 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:04:29,780 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:04:29,780 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:04:29,780 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-20 16:04:29,780 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)] === [2024-06-20 16:04:29,780 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:04:29,781 INFO L85 PathProgramCache]: Analyzing trace with hash -203461313, now seen corresponding path program 1 times [2024-06-20 16:04:29,781 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:04:29,781 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [347773194] [2024-06-20 16:04:29,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:04:29,781 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:04:29,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:04:30,371 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:04:30,371 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:04:30,371 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [347773194] [2024-06-20 16:04:30,372 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [347773194] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:04:30,372 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:04:30,372 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 16:04:30,372 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [40661004] [2024-06-20 16:04:30,372 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:04:30,372 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 16:04:30,373 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:04:30,373 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 16:04:30,373 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-20 16:04:30,432 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 16:04:30,432 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 56 transitions, 297 flow. Second operand has 7 states, 7 states have (on average 11.428571428571429) internal successors, (80), 7 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:04:30,432 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:04:30,432 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 16:04:30,433 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:04:30,830 INFO L124 PetriNetUnfolderBase]: 1409/2191 cut-off events. [2024-06-20 16:04:30,830 INFO L125 PetriNetUnfolderBase]: For 5223/5233 co-relation queries the response was YES. [2024-06-20 16:04:30,834 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7379 conditions, 2191 events. 1409/2191 cut-off events. For 5223/5233 co-relation queries the response was YES. Maximal size of possible extension queue 104. Compared 10578 event pairs, 568 based on Foata normal form. 4/2183 useless extension candidates. Maximal degree in co-relation 7357. Up to 2047 conditions per place. [2024-06-20 16:04:30,843 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 59 selfloop transitions, 11 changer transitions 0/78 dead transitions. [2024-06-20 16:04:30,843 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 78 transitions, 509 flow [2024-06-20 16:04:30,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 16:04:30,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 16:04:30,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 116 transitions. [2024-06-20 16:04:30,844 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4715447154471545 [2024-06-20 16:04:30,845 INFO L175 Difference]: Start difference. First operand has 56 places, 56 transitions, 297 flow. Second operand 6 states and 116 transitions. [2024-06-20 16:04:30,845 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 78 transitions, 509 flow [2024-06-20 16:04:30,848 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 78 transitions, 495 flow, removed 6 selfloop flow, removed 1 redundant places. [2024-06-20 16:04:30,849 INFO L231 Difference]: Finished difference. Result has 61 places, 59 transitions, 341 flow [2024-06-20 16:04:30,849 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=283, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=341, PETRI_PLACES=61, PETRI_TRANSITIONS=59} [2024-06-20 16:04:30,850 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 19 predicate places. [2024-06-20 16:04:30,850 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 59 transitions, 341 flow [2024-06-20 16:04:30,850 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.428571428571429) internal successors, (80), 7 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:04:30,850 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:04:30,850 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:04:30,850 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-20 16:04:30,851 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)] === [2024-06-20 16:04:30,851 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:04:30,851 INFO L85 PathProgramCache]: Analyzing trace with hash -1254128261, now seen corresponding path program 2 times [2024-06-20 16:04:30,851 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:04:30,851 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1222198872] [2024-06-20 16:04:30,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:04:30,852 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:04:30,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:04:31,421 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:04:31,422 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:04:31,422 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1222198872] [2024-06-20 16:04:31,422 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1222198872] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:04:31,422 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:04:31,422 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 16:04:31,422 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [278164719] [2024-06-20 16:04:31,423 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:04:31,423 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 16:04:31,423 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:04:31,423 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 16:04:31,424 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-20 16:04:31,483 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 16:04:31,484 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 59 transitions, 341 flow. Second operand has 7 states, 7 states have (on average 11.428571428571429) internal successors, (80), 7 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:04:31,484 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:04:31,484 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 16:04:31,484 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:04:31,822 INFO L124 PetriNetUnfolderBase]: 1415/2207 cut-off events. [2024-06-20 16:04:31,822 INFO L125 PetriNetUnfolderBase]: For 7055/7071 co-relation queries the response was YES. [2024-06-20 16:04:31,826 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7960 conditions, 2207 events. 1415/2207 cut-off events. For 7055/7071 co-relation queries the response was YES. Maximal size of possible extension queue 104. Compared 10724 event pairs, 575 based on Foata normal form. 8/2203 useless extension candidates. Maximal degree in co-relation 7935. Up to 2029 conditions per place. [2024-06-20 16:04:31,843 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 55 selfloop transitions, 16 changer transitions 0/79 dead transitions. [2024-06-20 16:04:31,843 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 79 transitions, 557 flow [2024-06-20 16:04:31,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 16:04:31,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 16:04:31,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 116 transitions. [2024-06-20 16:04:31,844 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4715447154471545 [2024-06-20 16:04:31,844 INFO L175 Difference]: Start difference. First operand has 61 places, 59 transitions, 341 flow. Second operand 6 states and 116 transitions. [2024-06-20 16:04:31,844 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 79 transitions, 557 flow [2024-06-20 16:04:31,848 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 79 transitions, 523 flow, removed 8 selfloop flow, removed 4 redundant places. [2024-06-20 16:04:31,850 INFO L231 Difference]: Finished difference. Result has 63 places, 62 transitions, 381 flow [2024-06-20 16:04:31,850 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=307, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=381, PETRI_PLACES=63, PETRI_TRANSITIONS=62} [2024-06-20 16:04:31,851 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 21 predicate places. [2024-06-20 16:04:31,851 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 62 transitions, 381 flow [2024-06-20 16:04:31,851 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.428571428571429) internal successors, (80), 7 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:04:31,851 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:04:31,852 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:04:31,852 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-20 16:04:31,852 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)] === [2024-06-20 16:04:31,852 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:04:31,852 INFO L85 PathProgramCache]: Analyzing trace with hash -1254120325, now seen corresponding path program 1 times [2024-06-20 16:04:31,852 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:04:31,853 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [963250172] [2024-06-20 16:04:31,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:04:31,853 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:04:31,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:04:32,688 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:04:32,688 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:04:32,689 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [963250172] [2024-06-20 16:04:32,689 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [963250172] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:04:32,689 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:04:32,689 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 16:04:32,689 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [276879863] [2024-06-20 16:04:32,689 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:04:32,690 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 16:04:32,690 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:04:32,690 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 16:04:32,690 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-20 16:04:32,777 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 16:04:32,777 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 62 transitions, 381 flow. Second operand has 8 states, 8 states have (on average 11.375) internal successors, (91), 8 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:04:32,777 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:04:32,777 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 16:04:32,777 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:04:33,165 INFO L124 PetriNetUnfolderBase]: 1365/2148 cut-off events. [2024-06-20 16:04:33,166 INFO L125 PetriNetUnfolderBase]: For 8574/8574 co-relation queries the response was YES. [2024-06-20 16:04:33,169 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8202 conditions, 2148 events. 1365/2148 cut-off events. For 8574/8574 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 10486 event pairs, 533 based on Foata normal form. 3/2150 useless extension candidates. Maximal degree in co-relation 8176. Up to 1986 conditions per place. [2024-06-20 16:04:33,176 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 61 selfloop transitions, 21 changer transitions 0/87 dead transitions. [2024-06-20 16:04:33,177 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 87 transitions, 655 flow [2024-06-20 16:04:33,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 16:04:33,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 16:04:33,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 136 transitions. [2024-06-20 16:04:33,178 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4738675958188153 [2024-06-20 16:04:33,179 INFO L175 Difference]: Start difference. First operand has 63 places, 62 transitions, 381 flow. Second operand 7 states and 136 transitions. [2024-06-20 16:04:33,180 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 87 transitions, 655 flow [2024-06-20 16:04:33,188 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 87 transitions, 605 flow, removed 11 selfloop flow, removed 4 redundant places. [2024-06-20 16:04:33,189 INFO L231 Difference]: Finished difference. Result has 66 places, 66 transitions, 420 flow [2024-06-20 16:04:33,189 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=331, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=420, PETRI_PLACES=66, PETRI_TRANSITIONS=66} [2024-06-20 16:04:33,191 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 24 predicate places. [2024-06-20 16:04:33,191 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 66 transitions, 420 flow [2024-06-20 16:04:33,191 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.375) internal successors, (91), 8 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:04:33,191 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:04:33,191 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:04:33,191 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-20 16:04:33,192 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)] === [2024-06-20 16:04:33,192 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:04:33,192 INFO L85 PathProgramCache]: Analyzing trace with hash 461921059, now seen corresponding path program 1 times [2024-06-20 16:04:33,192 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:04:33,192 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [326613973] [2024-06-20 16:04:33,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:04:33,193 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:04:33,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:04:34,117 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:04:34,118 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:04:34,118 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [326613973] [2024-06-20 16:04:34,118 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [326613973] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:04:34,118 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:04:34,118 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 16:04:34,118 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1657424010] [2024-06-20 16:04:34,118 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:04:34,119 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 16:04:34,119 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:04:34,120 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 16:04:34,120 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-20 16:04:34,195 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 16:04:34,195 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 66 transitions, 420 flow. Second operand has 8 states, 8 states have (on average 11.375) internal successors, (91), 8 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:04:34,195 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:04:34,195 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 16:04:34,195 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:04:34,679 INFO L124 PetriNetUnfolderBase]: 1445/2233 cut-off events. [2024-06-20 16:04:34,680 INFO L125 PetriNetUnfolderBase]: For 11854/11873 co-relation queries the response was YES. [2024-06-20 16:04:34,684 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9186 conditions, 2233 events. 1445/2233 cut-off events. For 11854/11873 co-relation queries the response was YES. Maximal size of possible extension queue 103. Compared 10717 event pairs, 571 based on Foata normal form. 3/2229 useless extension candidates. Maximal degree in co-relation 9159. Up to 2071 conditions per place. [2024-06-20 16:04:34,691 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 71 selfloop transitions, 14 changer transitions 0/94 dead transitions. [2024-06-20 16:04:34,691 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 94 transitions, 690 flow [2024-06-20 16:04:34,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 16:04:34,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 16:04:34,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 135 transitions. [2024-06-20 16:04:34,692 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47038327526132406 [2024-06-20 16:04:34,692 INFO L175 Difference]: Start difference. First operand has 66 places, 66 transitions, 420 flow. Second operand 7 states and 135 transitions. [2024-06-20 16:04:34,692 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 94 transitions, 690 flow [2024-06-20 16:04:34,697 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 94 transitions, 631 flow, removed 11 selfloop flow, removed 5 redundant places. [2024-06-20 16:04:34,698 INFO L231 Difference]: Finished difference. Result has 68 places, 69 transitions, 439 flow [2024-06-20 16:04:34,698 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=361, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=439, PETRI_PLACES=68, PETRI_TRANSITIONS=69} [2024-06-20 16:04:34,699 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 26 predicate places. [2024-06-20 16:04:34,699 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 69 transitions, 439 flow [2024-06-20 16:04:34,699 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.375) internal successors, (91), 8 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:04:34,699 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:04:34,699 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:04:34,699 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-20 16:04:34,699 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)] === [2024-06-20 16:04:34,700 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:04:34,700 INFO L85 PathProgramCache]: Analyzing trace with hash -2012332651, now seen corresponding path program 1 times [2024-06-20 16:04:34,700 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:04:34,700 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [472189977] [2024-06-20 16:04:34,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:04:34,701 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:04:34,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:04:35,325 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:04:35,325 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:04:35,325 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [472189977] [2024-06-20 16:04:35,325 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [472189977] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:04:35,325 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:04:35,326 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 16:04:35,326 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2059072033] [2024-06-20 16:04:35,326 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:04:35,326 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 16:04:35,326 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:04:35,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 16:04:35,327 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-20 16:04:35,394 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-20 16:04:35,395 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 69 transitions, 439 flow. Second operand has 8 states, 8 states have (on average 10.375) internal successors, (83), 8 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:04:35,395 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:04:35,395 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-20 16:04:35,395 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:04:35,813 INFO L124 PetriNetUnfolderBase]: 1635/2454 cut-off events. [2024-06-20 16:04:35,813 INFO L125 PetriNetUnfolderBase]: For 15031/15031 co-relation queries the response was YES. [2024-06-20 16:04:35,818 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10603 conditions, 2454 events. 1635/2454 cut-off events. For 15031/15031 co-relation queries the response was YES. Maximal size of possible extension queue 110. Compared 11455 event pairs, 592 based on Foata normal form. 6/2459 useless extension candidates. Maximal degree in co-relation 10575. Up to 2319 conditions per place. [2024-06-20 16:04:35,827 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 81 selfloop transitions, 22 changer transitions 0/107 dead transitions. [2024-06-20 16:04:35,827 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 107 transitions, 861 flow [2024-06-20 16:04:35,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 16:04:35,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 16:04:35,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 136 transitions. [2024-06-20 16:04:35,829 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4738675958188153 [2024-06-20 16:04:35,829 INFO L175 Difference]: Start difference. First operand has 68 places, 69 transitions, 439 flow. Second operand 7 states and 136 transitions. [2024-06-20 16:04:35,829 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 107 transitions, 861 flow [2024-06-20 16:04:35,835 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 107 transitions, 807 flow, removed 15 selfloop flow, removed 5 redundant places. [2024-06-20 16:04:35,837 INFO L231 Difference]: Finished difference. Result has 72 places, 80 transitions, 561 flow [2024-06-20 16:04:35,838 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=385, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=561, PETRI_PLACES=72, PETRI_TRANSITIONS=80} [2024-06-20 16:04:35,838 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 30 predicate places. [2024-06-20 16:04:35,840 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 80 transitions, 561 flow [2024-06-20 16:04:35,841 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.375) internal successors, (83), 8 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:04:35,841 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:04:35,841 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:04:35,841 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-20 16:04:35,841 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:04:35,842 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:04:35,842 INFO L85 PathProgramCache]: Analyzing trace with hash -223032521, now seen corresponding path program 2 times [2024-06-20 16:04:35,842 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:04:35,842 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [513995471] [2024-06-20 16:04:35,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:04:35,843 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:04:35,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:04:36,482 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:04:36,482 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:04:36,482 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [513995471] [2024-06-20 16:04:36,483 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [513995471] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:04:36,483 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:04:36,483 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 16:04:36,483 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [346805382] [2024-06-20 16:04:36,483 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:04:36,483 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 16:04:36,484 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:04:36,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 16:04:36,484 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-20 16:04:36,540 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-20 16:04:36,540 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 80 transitions, 561 flow. Second operand has 8 states, 8 states have (on average 10.375) internal successors, (83), 8 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:04:36,540 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:04:36,541 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-20 16:04:36,541 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:04:36,954 INFO L124 PetriNetUnfolderBase]: 1719/2583 cut-off events. [2024-06-20 16:04:36,954 INFO L125 PetriNetUnfolderBase]: For 20639/20643 co-relation queries the response was YES. [2024-06-20 16:04:36,961 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12344 conditions, 2583 events. 1719/2583 cut-off events. For 20639/20643 co-relation queries the response was YES. Maximal size of possible extension queue 117. Compared 12188 event pairs, 597 based on Foata normal form. 10/2592 useless extension candidates. Maximal degree in co-relation 12313. Up to 2285 conditions per place. [2024-06-20 16:04:36,971 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 72 selfloop transitions, 42 changer transitions 0/118 dead transitions. [2024-06-20 16:04:36,971 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 118 transitions, 1079 flow [2024-06-20 16:04:36,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 16:04:36,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 16:04:36,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 138 transitions. [2024-06-20 16:04:36,973 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4808362369337979 [2024-06-20 16:04:36,973 INFO L175 Difference]: Start difference. First operand has 72 places, 80 transitions, 561 flow. Second operand 7 states and 138 transitions. [2024-06-20 16:04:36,973 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 118 transitions, 1079 flow [2024-06-20 16:04:36,985 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 118 transitions, 1021 flow, removed 25 selfloop flow, removed 2 redundant places. [2024-06-20 16:04:36,987 INFO L231 Difference]: Finished difference. Result has 78 places, 92 transitions, 772 flow [2024-06-20 16:04:36,987 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=509, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=772, PETRI_PLACES=78, PETRI_TRANSITIONS=92} [2024-06-20 16:04:36,988 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 36 predicate places. [2024-06-20 16:04:36,988 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 92 transitions, 772 flow [2024-06-20 16:04:36,988 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.375) internal successors, (83), 8 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:04:36,988 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:04:36,988 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:04:36,989 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-20 16:04:36,989 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)] === [2024-06-20 16:04:36,989 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:04:36,989 INFO L85 PathProgramCache]: Analyzing trace with hash -1204227751, now seen corresponding path program 3 times [2024-06-20 16:04:36,989 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:04:36,989 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1468246216] [2024-06-20 16:04:36,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:04:36,990 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:04:36,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:04:37,638 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:04:37,638 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:04:37,638 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1468246216] [2024-06-20 16:04:37,638 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1468246216] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:04:37,638 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:04:37,638 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 16:04:37,638 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2049115480] [2024-06-20 16:04:37,638 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:04:37,639 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 16:04:37,639 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:04:37,639 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 16:04:37,639 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-20 16:04:37,711 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-20 16:04:37,711 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 92 transitions, 772 flow. Second operand has 8 states, 8 states have (on average 10.375) internal successors, (83), 8 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:04:37,712 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:04:37,712 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-20 16:04:37,712 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:04:38,106 INFO L124 PetriNetUnfolderBase]: 1707/2570 cut-off events. [2024-06-20 16:04:38,106 INFO L125 PetriNetUnfolderBase]: For 24258/24262 co-relation queries the response was YES. [2024-06-20 16:04:38,112 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13020 conditions, 2570 events. 1707/2570 cut-off events. For 24258/24262 co-relation queries the response was YES. Maximal size of possible extension queue 115. Compared 12159 event pairs, 607 based on Foata normal form. 10/2579 useless extension candidates. Maximal degree in co-relation 12986. Up to 2279 conditions per place. [2024-06-20 16:04:38,122 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 76 selfloop transitions, 37 changer transitions 0/117 dead transitions. [2024-06-20 16:04:38,123 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 117 transitions, 1130 flow [2024-06-20 16:04:38,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 16:04:38,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 16:04:38,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 137 transitions. [2024-06-20 16:04:38,124 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47735191637630664 [2024-06-20 16:04:38,124 INFO L175 Difference]: Start difference. First operand has 78 places, 92 transitions, 772 flow. Second operand 7 states and 137 transitions. [2024-06-20 16:04:38,124 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 117 transitions, 1130 flow [2024-06-20 16:04:38,142 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 117 transitions, 1043 flow, removed 38 selfloop flow, removed 2 redundant places. [2024-06-20 16:04:38,144 INFO L231 Difference]: Finished difference. Result has 83 places, 92 transitions, 769 flow [2024-06-20 16:04:38,144 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=685, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=92, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=769, PETRI_PLACES=83, PETRI_TRANSITIONS=92} [2024-06-20 16:04:38,145 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 41 predicate places. [2024-06-20 16:04:38,145 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 92 transitions, 769 flow [2024-06-20 16:04:38,145 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.375) internal successors, (83), 8 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:04:38,145 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:04:38,145 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:04:38,145 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-20 16:04:38,146 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)] === [2024-06-20 16:04:38,146 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:04:38,146 INFO L85 PathProgramCache]: Analyzing trace with hash -223023593, now seen corresponding path program 1 times [2024-06-20 16:04:38,146 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:04:38,146 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1400399768] [2024-06-20 16:04:38,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:04:38,147 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:04:38,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:04:38,997 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:04:38,998 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:04:38,998 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1400399768] [2024-06-20 16:04:38,998 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1400399768] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:04:38,998 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:04:38,998 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:04:38,998 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1801134803] [2024-06-20 16:04:38,998 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:04:38,999 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:04:38,999 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:04:38,999 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:04:38,999 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:04:39,099 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 16:04:39,100 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 92 transitions, 769 flow. Second operand has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:04:39,100 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:04:39,100 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 16:04:39,100 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:04:39,529 INFO L124 PetriNetUnfolderBase]: 1503/2363 cut-off events. [2024-06-20 16:04:39,529 INFO L125 PetriNetUnfolderBase]: For 21035/21035 co-relation queries the response was YES. [2024-06-20 16:04:39,534 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11533 conditions, 2363 events. 1503/2363 cut-off events. For 21035/21035 co-relation queries the response was YES. Maximal size of possible extension queue 109. Compared 11617 event pairs, 506 based on Foata normal form. 6/2368 useless extension candidates. Maximal degree in co-relation 11497. Up to 2157 conditions per place. [2024-06-20 16:04:39,542 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 92 selfloop transitions, 24 changer transitions 0/121 dead transitions. [2024-06-20 16:04:39,542 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 121 transitions, 1155 flow [2024-06-20 16:04:39,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:04:39,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:04:39,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 154 transitions. [2024-06-20 16:04:39,543 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4695121951219512 [2024-06-20 16:04:39,543 INFO L175 Difference]: Start difference. First operand has 83 places, 92 transitions, 769 flow. Second operand 8 states and 154 transitions. [2024-06-20 16:04:39,544 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 121 transitions, 1155 flow [2024-06-20 16:04:39,559 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 121 transitions, 1022 flow, removed 14 selfloop flow, removed 8 redundant places. [2024-06-20 16:04:39,561 INFO L231 Difference]: Finished difference. Result has 83 places, 95 transitions, 740 flow [2024-06-20 16:04:39,561 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=636, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=92, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=740, PETRI_PLACES=83, PETRI_TRANSITIONS=95} [2024-06-20 16:04:39,561 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 41 predicate places. [2024-06-20 16:04:39,561 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 95 transitions, 740 flow [2024-06-20 16:04:39,562 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:04:39,562 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:04:39,562 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:04:39,562 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-20 16:04:39,562 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:04:39,562 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:04:39,563 INFO L85 PathProgramCache]: Analyzing trace with hash 368949640, now seen corresponding path program 1 times [2024-06-20 16:04:39,563 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:04:39,563 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1271186512] [2024-06-20 16:04:39,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:04:39,563 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:04:39,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:04:40,156 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:04:40,157 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:04:40,157 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1271186512] [2024-06-20 16:04:40,157 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1271186512] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:04:40,157 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:04:40,157 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 16:04:40,157 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [754460353] [2024-06-20 16:04:40,157 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:04:40,158 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 16:04:40,158 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:04:40,158 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 16:04:40,158 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-20 16:04:40,228 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 16:04:40,228 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 95 transitions, 740 flow. Second operand has 7 states, 7 states have (on average 11.714285714285714) internal successors, (82), 7 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:04:40,228 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:04:40,228 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 16:04:40,228 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:04:40,587 INFO L124 PetriNetUnfolderBase]: 1500/2358 cut-off events. [2024-06-20 16:04:40,587 INFO L125 PetriNetUnfolderBase]: For 22613/22613 co-relation queries the response was YES. [2024-06-20 16:04:40,592 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11518 conditions, 2358 events. 1500/2358 cut-off events. For 22613/22613 co-relation queries the response was YES. Maximal size of possible extension queue 109. Compared 11584 event pairs, 525 based on Foata normal form. 1/2358 useless extension candidates. Maximal degree in co-relation 11484. Up to 2226 conditions per place. [2024-06-20 16:04:40,600 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 89 selfloop transitions, 10 changer transitions 0/104 dead transitions. [2024-06-20 16:04:40,600 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 104 transitions, 972 flow [2024-06-20 16:04:40,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 16:04:40,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 16:04:40,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 102 transitions. [2024-06-20 16:04:40,601 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4146341463414634 [2024-06-20 16:04:40,601 INFO L175 Difference]: Start difference. First operand has 83 places, 95 transitions, 740 flow. Second operand 6 states and 102 transitions. [2024-06-20 16:04:40,602 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 104 transitions, 972 flow [2024-06-20 16:04:40,614 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 104 transitions, 884 flow, removed 21 selfloop flow, removed 6 redundant places. [2024-06-20 16:04:40,616 INFO L231 Difference]: Finished difference. Result has 84 places, 97 transitions, 699 flow [2024-06-20 16:04:40,616 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=654, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=95, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=699, PETRI_PLACES=84, PETRI_TRANSITIONS=97} [2024-06-20 16:04:40,616 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 42 predicate places. [2024-06-20 16:04:40,616 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 97 transitions, 699 flow [2024-06-20 16:04:40,617 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.714285714285714) internal successors, (82), 7 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:04:40,617 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:04:40,617 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:04:40,617 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-20 16:04:40,617 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)] === [2024-06-20 16:04:40,617 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:04:40,617 INFO L85 PathProgramCache]: Analyzing trace with hash 2042048099, now seen corresponding path program 1 times [2024-06-20 16:04:40,618 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:04:40,618 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [205242150] [2024-06-20 16:04:40,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:04:40,618 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:04:40,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:04:41,422 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:04:41,422 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:04:41,422 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [205242150] [2024-06-20 16:04:41,422 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [205242150] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:04:41,422 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:04:41,422 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:04:41,422 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [475951903] [2024-06-20 16:04:41,422 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:04:41,423 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:04:41,423 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:04:41,423 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:04:41,423 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:04:41,516 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-20 16:04:41,527 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 97 transitions, 699 flow. Second operand has 9 states, 9 states have (on average 10.333333333333334) internal successors, (93), 9 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) [2024-06-20 16:04:41,527 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:04:41,527 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-20 16:04:41,527 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:04:42,039 INFO L124 PetriNetUnfolderBase]: 1709/2572 cut-off events. [2024-06-20 16:04:42,039 INFO L125 PetriNetUnfolderBase]: For 28976/28976 co-relation queries the response was YES. [2024-06-20 16:04:42,045 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12795 conditions, 2572 events. 1709/2572 cut-off events. For 28976/28976 co-relation queries the response was YES. Maximal size of possible extension queue 116. Compared 12151 event pairs, 591 based on Foata normal form. 3/2574 useless extension candidates. Maximal degree in co-relation 12759. Up to 2450 conditions per place. [2024-06-20 16:04:42,053 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 107 selfloop transitions, 28 changer transitions 0/139 dead transitions. [2024-06-20 16:04:42,053 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 139 transitions, 1263 flow [2024-06-20 16:04:42,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:04:42,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:04:42,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 154 transitions. [2024-06-20 16:04:42,054 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4695121951219512 [2024-06-20 16:04:42,055 INFO L175 Difference]: Start difference. First operand has 84 places, 97 transitions, 699 flow. Second operand 8 states and 154 transitions. [2024-06-20 16:04:42,055 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 139 transitions, 1263 flow [2024-06-20 16:04:42,071 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 139 transitions, 1238 flow, removed 2 selfloop flow, removed 4 redundant places. [2024-06-20 16:04:42,076 INFO L231 Difference]: Finished difference. Result has 90 places, 108 transitions, 896 flow [2024-06-20 16:04:42,077 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=674, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=97, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=896, PETRI_PLACES=90, PETRI_TRANSITIONS=108} [2024-06-20 16:04:42,078 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 48 predicate places. [2024-06-20 16:04:42,078 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 108 transitions, 896 flow [2024-06-20 16:04:42,078 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.333333333333334) internal successors, (93), 9 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) [2024-06-20 16:04:42,078 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:04:42,078 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:04:42,078 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-20 16:04:42,078 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)] === [2024-06-20 16:04:42,079 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:04:42,079 INFO L85 PathProgramCache]: Analyzing trace with hash -251448502, now seen corresponding path program 1 times [2024-06-20 16:04:42,079 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:04:42,079 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1158009339] [2024-06-20 16:04:42,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:04:42,079 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:04:42,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:04:42,906 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:04:42,907 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:04:42,907 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1158009339] [2024-06-20 16:04:42,907 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1158009339] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:04:42,907 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:04:42,907 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:04:42,907 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1095949444] [2024-06-20 16:04:42,907 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:04:42,907 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:04:42,907 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:04:42,908 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:04:42,908 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:04:42,976 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-20 16:04:42,976 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 108 transitions, 896 flow. Second operand has 9 states, 9 states have (on average 10.333333333333334) internal successors, (93), 9 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) [2024-06-20 16:04:42,976 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:04:42,976 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-20 16:04:42,976 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:04:43,489 INFO L124 PetriNetUnfolderBase]: 1745/2626 cut-off events. [2024-06-20 16:04:43,489 INFO L125 PetriNetUnfolderBase]: For 35126/35126 co-relation queries the response was YES. [2024-06-20 16:04:43,494 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13940 conditions, 2626 events. 1745/2626 cut-off events. For 35126/35126 co-relation queries the response was YES. Maximal size of possible extension queue 119. Compared 12366 event pairs, 563 based on Foata normal form. 6/2631 useless extension candidates. Maximal degree in co-relation 13902. Up to 2454 conditions per place. [2024-06-20 16:04:43,502 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 110 selfloop transitions, 28 changer transitions 0/142 dead transitions. [2024-06-20 16:04:43,502 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 142 transitions, 1372 flow [2024-06-20 16:04:43,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:04:43,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:04:43,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 153 transitions. [2024-06-20 16:04:43,504 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46646341463414637 [2024-06-20 16:04:43,505 INFO L175 Difference]: Start difference. First operand has 90 places, 108 transitions, 896 flow. Second operand 8 states and 153 transitions. [2024-06-20 16:04:43,505 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 142 transitions, 1372 flow [2024-06-20 16:04:43,527 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 142 transitions, 1287 flow, removed 34 selfloop flow, removed 3 redundant places. [2024-06-20 16:04:43,529 INFO L231 Difference]: Finished difference. Result has 95 places, 113 transitions, 949 flow [2024-06-20 16:04:43,529 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=811, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=108, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=949, PETRI_PLACES=95, PETRI_TRANSITIONS=113} [2024-06-20 16:04:43,530 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 53 predicate places. [2024-06-20 16:04:43,530 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 113 transitions, 949 flow [2024-06-20 16:04:43,530 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.333333333333334) internal successors, (93), 9 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) [2024-06-20 16:04:43,530 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:04:43,530 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:04:43,530 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-20 16:04:43,531 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)] === [2024-06-20 16:04:43,531 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:04:43,531 INFO L85 PathProgramCache]: Analyzing trace with hash -1652862348, now seen corresponding path program 2 times [2024-06-20 16:04:43,531 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:04:43,531 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [822268602] [2024-06-20 16:04:43,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:04:43,531 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:04:43,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:04:44,300 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:04:44,301 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:04:44,301 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [822268602] [2024-06-20 16:04:44,301 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [822268602] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:04:44,301 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:04:44,301 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:04:44,301 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1113763626] [2024-06-20 16:04:44,301 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:04:44,301 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:04:44,302 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:04:44,302 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:04:44,302 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:04:44,379 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-20 16:04:44,379 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 113 transitions, 949 flow. Second operand has 9 states, 9 states have (on average 10.333333333333334) internal successors, (93), 9 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) [2024-06-20 16:04:44,379 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:04:44,380 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-20 16:04:44,380 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:04:44,827 INFO L124 PetriNetUnfolderBase]: 1771/2671 cut-off events. [2024-06-20 16:04:44,827 INFO L125 PetriNetUnfolderBase]: For 39674/39678 co-relation queries the response was YES. [2024-06-20 16:04:44,834 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14942 conditions, 2671 events. 1771/2671 cut-off events. For 39674/39678 co-relation queries the response was YES. Maximal size of possible extension queue 125. Compared 12798 event pairs, 548 based on Foata normal form. 7/2677 useless extension candidates. Maximal degree in co-relation 14902. Up to 2415 conditions per place. [2024-06-20 16:04:44,842 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 116 selfloop transitions, 52 changer transitions 0/172 dead transitions. [2024-06-20 16:04:44,843 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 172 transitions, 1807 flow [2024-06-20 16:04:44,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:04:44,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:04:44,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 153 transitions. [2024-06-20 16:04:44,845 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46646341463414637 [2024-06-20 16:04:44,845 INFO L175 Difference]: Start difference. First operand has 95 places, 113 transitions, 949 flow. Second operand 8 states and 153 transitions. [2024-06-20 16:04:44,845 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 172 transitions, 1807 flow [2024-06-20 16:04:44,874 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 172 transitions, 1651 flow, removed 45 selfloop flow, removed 6 redundant places. [2024-06-20 16:04:44,876 INFO L231 Difference]: Finished difference. Result has 100 places, 143 transitions, 1330 flow [2024-06-20 16:04:44,877 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=847, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=113, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1330, PETRI_PLACES=100, PETRI_TRANSITIONS=143} [2024-06-20 16:04:44,877 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 58 predicate places. [2024-06-20 16:04:44,877 INFO L495 AbstractCegarLoop]: Abstraction has has 100 places, 143 transitions, 1330 flow [2024-06-20 16:04:44,878 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.333333333333334) internal successors, (93), 9 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) [2024-06-20 16:04:44,878 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:04:44,878 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:04:44,878 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-20 16:04:44,878 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)] === [2024-06-20 16:04:44,878 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:04:44,879 INFO L85 PathProgramCache]: Analyzing trace with hash 1675927228, now seen corresponding path program 3 times [2024-06-20 16:04:44,879 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:04:44,879 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2072799987] [2024-06-20 16:04:44,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:04:44,879 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:04:44,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:04:45,753 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:04:45,754 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:04:45,754 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2072799987] [2024-06-20 16:04:45,754 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2072799987] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:04:45,754 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:04:45,754 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:04:45,754 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1883769912] [2024-06-20 16:04:45,755 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:04:45,755 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:04:45,756 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:04:45,756 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:04:45,756 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:04:45,809 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-20 16:04:45,809 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 143 transitions, 1330 flow. Second operand has 9 states, 9 states have (on average 10.333333333333334) internal successors, (93), 9 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) [2024-06-20 16:04:45,810 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:04:45,810 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-20 16:04:45,810 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:04:46,247 INFO L124 PetriNetUnfolderBase]: 1807/2713 cut-off events. [2024-06-20 16:04:46,247 INFO L125 PetriNetUnfolderBase]: For 44971/44973 co-relation queries the response was YES. [2024-06-20 16:04:46,254 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16138 conditions, 2713 events. 1807/2713 cut-off events. For 44971/44973 co-relation queries the response was YES. Maximal size of possible extension queue 125. Compared 12874 event pairs, 556 based on Foata normal form. 8/2720 useless extension candidates. Maximal degree in co-relation 16094. Up to 2401 conditions per place. [2024-06-20 16:04:46,264 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 106 selfloop transitions, 67 changer transitions 0/177 dead transitions. [2024-06-20 16:04:46,264 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 177 transitions, 1957 flow [2024-06-20 16:04:46,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:04:46,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:04:46,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 154 transitions. [2024-06-20 16:04:46,265 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4695121951219512 [2024-06-20 16:04:46,265 INFO L175 Difference]: Start difference. First operand has 100 places, 143 transitions, 1330 flow. Second operand 8 states and 154 transitions. [2024-06-20 16:04:46,265 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 177 transitions, 1957 flow [2024-06-20 16:04:46,301 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 177 transitions, 1868 flow, removed 39 selfloop flow, removed 2 redundant places. [2024-06-20 16:04:46,303 INFO L231 Difference]: Finished difference. Result has 106 places, 151 transitions, 1549 flow [2024-06-20 16:04:46,303 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1255, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=143, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1549, PETRI_PLACES=106, PETRI_TRANSITIONS=151} [2024-06-20 16:04:46,303 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 64 predicate places. [2024-06-20 16:04:46,303 INFO L495 AbstractCegarLoop]: Abstraction has has 106 places, 151 transitions, 1549 flow [2024-06-20 16:04:46,304 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.333333333333334) internal successors, (93), 9 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) [2024-06-20 16:04:46,304 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:04:46,304 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:04:46,304 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-20 16:04:46,304 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)] === [2024-06-20 16:04:46,304 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:04:46,304 INFO L85 PathProgramCache]: Analyzing trace with hash -1660480908, now seen corresponding path program 4 times [2024-06-20 16:04:46,305 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:04:46,305 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [638359385] [2024-06-20 16:04:46,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:04:46,305 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:04:46,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:04:47,151 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:04:47,151 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:04:47,151 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [638359385] [2024-06-20 16:04:47,151 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [638359385] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:04:47,152 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:04:47,152 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:04:47,152 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1204262939] [2024-06-20 16:04:47,152 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:04:47,152 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:04:47,152 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:04:47,153 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:04:47,153 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:04:47,215 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-20 16:04:47,215 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 151 transitions, 1549 flow. Second operand has 9 states, 9 states have (on average 10.333333333333334) internal successors, (93), 9 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) [2024-06-20 16:04:47,215 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:04:47,215 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-20 16:04:47,216 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:04:47,727 INFO L124 PetriNetUnfolderBase]: 1819/2741 cut-off events. [2024-06-20 16:04:47,727 INFO L125 PetriNetUnfolderBase]: For 50078/50080 co-relation queries the response was YES. [2024-06-20 16:04:47,735 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16992 conditions, 2741 events. 1819/2741 cut-off events. For 50078/50080 co-relation queries the response was YES. Maximal size of possible extension queue 126. Compared 13095 event pairs, 556 based on Foata normal form. 8/2748 useless extension candidates. Maximal degree in co-relation 16946. Up to 2419 conditions per place. [2024-06-20 16:04:47,744 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 122 selfloop transitions, 58 changer transitions 0/184 dead transitions. [2024-06-20 16:04:47,744 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 184 transitions, 2180 flow [2024-06-20 16:04:47,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:04:47,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:04:47,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 155 transitions. [2024-06-20 16:04:47,746 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4725609756097561 [2024-06-20 16:04:47,746 INFO L175 Difference]: Start difference. First operand has 106 places, 151 transitions, 1549 flow. Second operand 8 states and 155 transitions. [2024-06-20 16:04:47,746 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 184 transitions, 2180 flow [2024-06-20 16:04:47,788 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 184 transitions, 1936 flow, removed 60 selfloop flow, removed 6 redundant places. [2024-06-20 16:04:47,790 INFO L231 Difference]: Finished difference. Result has 108 places, 155 transitions, 1523 flow [2024-06-20 16:04:47,790 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1305, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=151, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1523, PETRI_PLACES=108, PETRI_TRANSITIONS=155} [2024-06-20 16:04:47,791 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 66 predicate places. [2024-06-20 16:04:47,791 INFO L495 AbstractCegarLoop]: Abstraction has has 108 places, 155 transitions, 1523 flow [2024-06-20 16:04:47,791 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.333333333333334) internal successors, (93), 9 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) [2024-06-20 16:04:47,791 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:04:47,791 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:04:47,791 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-20 16:04:47,791 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:04:47,792 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:04:47,792 INFO L85 PathProgramCache]: Analyzing trace with hash -1447461146, now seen corresponding path program 1 times [2024-06-20 16:04:47,792 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:04:47,792 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1237491245] [2024-06-20 16:04:47,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:04:47,792 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:04:47,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:04:48,386 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:04:48,386 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:04:48,386 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1237491245] [2024-06-20 16:04:48,387 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1237491245] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:04:48,387 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:04:48,387 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 16:04:48,387 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [911220537] [2024-06-20 16:04:48,387 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:04:48,387 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 16:04:48,387 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:04:48,388 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 16:04:48,388 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-20 16:04:48,453 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 16:04:48,453 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 155 transitions, 1523 flow. Second operand has 7 states, 7 states have (on average 11.857142857142858) internal successors, (83), 7 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:04:48,453 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:04:48,453 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 16:04:48,453 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:04:48,916 INFO L124 PetriNetUnfolderBase]: 1606/2515 cut-off events. [2024-06-20 16:04:48,916 INFO L125 PetriNetUnfolderBase]: For 44412/44412 co-relation queries the response was YES. [2024-06-20 16:04:48,923 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15613 conditions, 2515 events. 1606/2515 cut-off events. For 44412/44412 co-relation queries the response was YES. Maximal size of possible extension queue 120. Compared 12365 event pairs, 467 based on Foata normal form. 2/2516 useless extension candidates. Maximal degree in co-relation 15566. Up to 2374 conditions per place. [2024-06-20 16:04:48,930 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 149 selfloop transitions, 13 changer transitions 0/167 dead transitions. [2024-06-20 16:04:48,930 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 114 places, 167 transitions, 1897 flow [2024-06-20 16:04:48,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 16:04:48,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 16:04:48,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 117 transitions. [2024-06-20 16:04:48,931 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4076655052264808 [2024-06-20 16:04:48,931 INFO L175 Difference]: Start difference. First operand has 108 places, 155 transitions, 1523 flow. Second operand 7 states and 117 transitions. [2024-06-20 16:04:48,931 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 114 places, 167 transitions, 1897 flow [2024-06-20 16:04:48,986 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 167 transitions, 1703 flow, removed 44 selfloop flow, removed 6 redundant places. [2024-06-20 16:04:48,988 INFO L231 Difference]: Finished difference. Result has 109 places, 158 transitions, 1395 flow [2024-06-20 16:04:48,988 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1329, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=155, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=142, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1395, PETRI_PLACES=109, PETRI_TRANSITIONS=158} [2024-06-20 16:04:48,988 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 67 predicate places. [2024-06-20 16:04:48,988 INFO L495 AbstractCegarLoop]: Abstraction has has 109 places, 158 transitions, 1395 flow [2024-06-20 16:04:48,989 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.857142857142858) internal successors, (83), 7 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:04:48,989 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:04:48,989 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:04:48,989 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-20 16:04:48,989 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)] === [2024-06-20 16:04:48,998 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:04:48,998 INFO L85 PathProgramCache]: Analyzing trace with hash 1521668514, now seen corresponding path program 1 times [2024-06-20 16:04:48,998 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:04:48,999 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [817132214] [2024-06-20 16:04:48,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:04:48,999 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:04:49,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:04:49,852 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:04:49,853 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:04:49,853 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [817132214] [2024-06-20 16:04:49,853 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [817132214] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:04:49,853 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:04:49,853 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:04:49,853 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [520076095] [2024-06-20 16:04:49,853 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:04:49,853 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:04:49,853 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:04:49,854 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:04:49,854 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:04:49,948 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 16:04:49,948 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 158 transitions, 1395 flow. Second operand has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:04:49,948 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:04:49,948 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 16:04:49,948 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:04:50,479 INFO L124 PetriNetUnfolderBase]: 1749/2671 cut-off events. [2024-06-20 16:04:50,480 INFO L125 PetriNetUnfolderBase]: For 55629/55631 co-relation queries the response was YES. [2024-06-20 16:04:50,487 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17049 conditions, 2671 events. 1749/2671 cut-off events. For 55629/55631 co-relation queries the response was YES. Maximal size of possible extension queue 125. Compared 13049 event pairs, 350 based on Foata normal form. 6/2676 useless extension candidates. Maximal degree in co-relation 17001. Up to 2385 conditions per place. [2024-06-20 16:04:50,494 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 143 selfloop transitions, 16 changer transitions 0/190 dead transitions. [2024-06-20 16:04:50,494 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 116 places, 190 transitions, 1843 flow [2024-06-20 16:04:50,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:04:50,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:04:50,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 152 transitions. [2024-06-20 16:04:50,496 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4634146341463415 [2024-06-20 16:04:50,496 INFO L175 Difference]: Start difference. First operand has 109 places, 158 transitions, 1395 flow. Second operand 8 states and 152 transitions. [2024-06-20 16:04:50,496 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 116 places, 190 transitions, 1843 flow [2024-06-20 16:04:50,532 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 190 transitions, 1799 flow, removed 11 selfloop flow, removed 5 redundant places. [2024-06-20 16:04:50,534 INFO L231 Difference]: Finished difference. Result has 112 places, 160 transitions, 1444 flow [2024-06-20 16:04:50,534 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1351, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=158, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=142, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1444, PETRI_PLACES=112, PETRI_TRANSITIONS=160} [2024-06-20 16:04:50,534 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 70 predicate places. [2024-06-20 16:04:50,534 INFO L495 AbstractCegarLoop]: Abstraction has has 112 places, 160 transitions, 1444 flow [2024-06-20 16:04:50,535 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:04:50,535 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:04:50,535 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:04:50,535 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-20 16:04:50,535 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:04:50,535 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:04:50,536 INFO L85 PathProgramCache]: Analyzing trace with hash -1231845064, now seen corresponding path program 2 times [2024-06-20 16:04:50,536 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:04:50,536 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1987667299] [2024-06-20 16:04:50,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:04:50,536 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:04:50,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:04:51,373 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:04:51,373 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:04:51,373 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1987667299] [2024-06-20 16:04:51,373 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1987667299] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:04:51,373 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:04:51,373 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:04:51,373 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1077018403] [2024-06-20 16:04:51,373 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:04:51,373 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:04:51,374 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:04:51,374 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:04:51,374 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:04:51,448 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 16:04:51,448 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 112 places, 160 transitions, 1444 flow. Second operand has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:04:51,448 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:04:51,448 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 16:04:51,448 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:04:51,980 INFO L124 PetriNetUnfolderBase]: 1766/2698 cut-off events. [2024-06-20 16:04:51,980 INFO L125 PetriNetUnfolderBase]: For 61153/61155 co-relation queries the response was YES. [2024-06-20 16:04:51,988 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17581 conditions, 2698 events. 1766/2698 cut-off events. For 61153/61155 co-relation queries the response was YES. Maximal size of possible extension queue 126. Compared 13178 event pairs, 473 based on Foata normal form. 6/2703 useless extension candidates. Maximal degree in co-relation 17532. Up to 2438 conditions per place. [2024-06-20 16:04:51,996 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 143 selfloop transitions, 17 changer transitions 0/191 dead transitions. [2024-06-20 16:04:51,996 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 191 transitions, 1896 flow [2024-06-20 16:04:51,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:04:51,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:04:51,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 152 transitions. [2024-06-20 16:04:51,998 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4634146341463415 [2024-06-20 16:04:51,998 INFO L175 Difference]: Start difference. First operand has 112 places, 160 transitions, 1444 flow. Second operand 8 states and 152 transitions. [2024-06-20 16:04:51,998 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 191 transitions, 1896 flow [2024-06-20 16:04:52,042 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 191 transitions, 1821 flow, removed 23 selfloop flow, removed 6 redundant places. [2024-06-20 16:04:52,043 INFO L231 Difference]: Finished difference. Result has 114 places, 162 transitions, 1468 flow [2024-06-20 16:04:52,044 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1369, PETRI_DIFFERENCE_MINUEND_PLACES=106, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=160, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=143, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1468, PETRI_PLACES=114, PETRI_TRANSITIONS=162} [2024-06-20 16:04:52,044 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 72 predicate places. [2024-06-20 16:04:52,044 INFO L495 AbstractCegarLoop]: Abstraction has has 114 places, 162 transitions, 1468 flow [2024-06-20 16:04:52,044 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:04:52,044 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:04:52,044 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:04:52,044 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-20 16:04:52,044 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:04:52,045 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:04:52,045 INFO L85 PathProgramCache]: Analyzing trace with hash -1231840104, now seen corresponding path program 1 times [2024-06-20 16:04:52,045 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:04:52,045 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [610956673] [2024-06-20 16:04:52,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:04:52,045 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:04:52,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:04:53,081 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:04:53,081 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:04:53,081 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [610956673] [2024-06-20 16:04:53,082 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [610956673] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:04:53,082 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:04:53,082 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:04:53,082 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [283069641] [2024-06-20 16:04:53,082 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:04:53,083 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:04:53,083 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:04:53,083 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:04:53,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:04:53,179 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-20 16:04:53,179 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 162 transitions, 1468 flow. Second operand has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:04:53,179 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:04:53,179 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-20 16:04:53,179 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:04:53,716 INFO L124 PetriNetUnfolderBase]: 1862/2808 cut-off events. [2024-06-20 16:04:53,716 INFO L125 PetriNetUnfolderBase]: For 67344/67344 co-relation queries the response was YES. [2024-06-20 16:04:53,725 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18508 conditions, 2808 events. 1862/2808 cut-off events. For 67344/67344 co-relation queries the response was YES. Maximal size of possible extension queue 128. Compared 13454 event pairs, 480 based on Foata normal form. 3/2810 useless extension candidates. Maximal degree in co-relation 18458. Up to 2664 conditions per place. [2024-06-20 16:04:53,735 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 165 selfloop transitions, 32 changer transitions 0/201 dead transitions. [2024-06-20 16:04:53,735 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 122 places, 201 transitions, 2178 flow [2024-06-20 16:04:53,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:04:53,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:04:53,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 171 transitions. [2024-06-20 16:04:53,736 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4634146341463415 [2024-06-20 16:04:53,736 INFO L175 Difference]: Start difference. First operand has 114 places, 162 transitions, 1468 flow. Second operand 9 states and 171 transitions. [2024-06-20 16:04:53,736 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 122 places, 201 transitions, 2178 flow [2024-06-20 16:04:53,783 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 201 transitions, 2097 flow, removed 25 selfloop flow, removed 6 redundant places. [2024-06-20 16:04:53,789 INFO L231 Difference]: Finished difference. Result has 117 places, 166 transitions, 1560 flow [2024-06-20 16:04:53,789 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1387, PETRI_DIFFERENCE_MINUEND_PLACES=108, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=162, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=130, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1560, PETRI_PLACES=117, PETRI_TRANSITIONS=166} [2024-06-20 16:04:53,789 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 75 predicate places. [2024-06-20 16:04:53,789 INFO L495 AbstractCegarLoop]: Abstraction has has 117 places, 166 transitions, 1560 flow [2024-06-20 16:04:53,790 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:04:53,790 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:04:53,790 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:04:53,790 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-20 16:04:53,790 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:04:53,790 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:04:53,790 INFO L85 PathProgramCache]: Analyzing trace with hash -1116553894, now seen corresponding path program 3 times [2024-06-20 16:04:53,790 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:04:53,790 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [726899281] [2024-06-20 16:04:53,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:04:53,790 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:04:53,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:04:54,621 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:04:54,622 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:04:54,622 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [726899281] [2024-06-20 16:04:54,622 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [726899281] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:04:54,622 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:04:54,622 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:04:54,622 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [940354273] [2024-06-20 16:04:54,622 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:04:54,622 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:04:54,623 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:04:54,623 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:04:54,623 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:04:54,697 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 16:04:54,697 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 117 places, 166 transitions, 1560 flow. Second operand has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:04:54,697 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:04:54,697 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 16:04:54,698 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:04:55,270 INFO L124 PetriNetUnfolderBase]: 1801/2756 cut-off events. [2024-06-20 16:04:55,270 INFO L125 PetriNetUnfolderBase]: For 73864/73866 co-relation queries the response was YES. [2024-06-20 16:04:55,280 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18767 conditions, 2756 events. 1801/2756 cut-off events. For 73864/73866 co-relation queries the response was YES. Maximal size of possible extension queue 128. Compared 13558 event pairs, 449 based on Foata normal form. 6/2761 useless extension candidates. Maximal degree in co-relation 18716. Up to 2494 conditions per place. [2024-06-20 16:04:55,292 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 147 selfloop transitions, 17 changer transitions 0/196 dead transitions. [2024-06-20 16:04:55,292 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 124 places, 196 transitions, 2027 flow [2024-06-20 16:04:55,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:04:55,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:04:55,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 149 transitions. [2024-06-20 16:04:55,294 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45426829268292684 [2024-06-20 16:04:55,294 INFO L175 Difference]: Start difference. First operand has 117 places, 166 transitions, 1560 flow. Second operand 8 states and 149 transitions. [2024-06-20 16:04:55,294 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 124 places, 196 transitions, 2027 flow [2024-06-20 16:04:55,346 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 196 transitions, 1884 flow, removed 42 selfloop flow, removed 7 redundant places. [2024-06-20 16:04:55,349 INFO L231 Difference]: Finished difference. Result has 119 places, 170 transitions, 1539 flow [2024-06-20 16:04:55,350 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1417, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=166, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=150, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1539, PETRI_PLACES=119, PETRI_TRANSITIONS=170} [2024-06-20 16:04:55,350 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 77 predicate places. [2024-06-20 16:04:55,350 INFO L495 AbstractCegarLoop]: Abstraction has has 119 places, 170 transitions, 1539 flow [2024-06-20 16:04:55,350 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:04:55,350 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:04:55,351 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:04:55,351 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-20 16:04:55,351 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:04:55,351 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:04:55,351 INFO L85 PathProgramCache]: Analyzing trace with hash 1640001094, now seen corresponding path program 2 times [2024-06-20 16:04:55,351 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:04:55,351 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2126502361] [2024-06-20 16:04:55,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:04:55,352 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:04:55,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:04:56,389 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:04:56,390 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:04:56,390 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2126502361] [2024-06-20 16:04:56,390 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2126502361] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:04:56,390 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:04:56,390 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:04:56,390 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1611560699] [2024-06-20 16:04:56,390 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:04:56,390 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:04:56,391 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:04:56,391 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:04:56,391 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:04:56,466 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-20 16:04:56,467 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 170 transitions, 1539 flow. Second operand has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:04:56,467 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:04:56,467 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-20 16:04:56,467 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:04:57,176 INFO L124 PetriNetUnfolderBase]: 1915/2896 cut-off events. [2024-06-20 16:04:57,176 INFO L125 PetriNetUnfolderBase]: For 80706/80706 co-relation queries the response was YES. [2024-06-20 16:04:57,185 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19769 conditions, 2896 events. 1915/2896 cut-off events. For 80706/80706 co-relation queries the response was YES. Maximal size of possible extension queue 132. Compared 14031 event pairs, 477 based on Foata normal form. 3/2898 useless extension candidates. Maximal degree in co-relation 19716. Up to 2680 conditions per place. [2024-06-20 16:04:57,194 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 164 selfloop transitions, 47 changer transitions 0/215 dead transitions. [2024-06-20 16:04:57,195 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 215 transitions, 2293 flow [2024-06-20 16:04:57,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 16:04:57,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 16:04:57,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 187 transitions. [2024-06-20 16:04:57,196 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4560975609756098 [2024-06-20 16:04:57,196 INFO L175 Difference]: Start difference. First operand has 119 places, 170 transitions, 1539 flow. Second operand 10 states and 187 transitions. [2024-06-20 16:04:57,196 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 215 transitions, 2293 flow [2024-06-20 16:04:57,256 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 215 transitions, 2204 flow, removed 30 selfloop flow, removed 5 redundant places. [2024-06-20 16:04:57,258 INFO L231 Difference]: Finished difference. Result has 125 places, 179 transitions, 1712 flow [2024-06-20 16:04:57,258 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1450, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=170, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=127, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1712, PETRI_PLACES=125, PETRI_TRANSITIONS=179} [2024-06-20 16:04:57,258 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 83 predicate places. [2024-06-20 16:04:57,258 INFO L495 AbstractCegarLoop]: Abstraction has has 125 places, 179 transitions, 1712 flow [2024-06-20 16:04:57,258 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:04:57,259 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:04:57,259 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:04:57,259 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-20 16:04:57,259 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:04:57,259 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:04:57,259 INFO L85 PathProgramCache]: Analyzing trace with hash -1116369196, now seen corresponding path program 1 times [2024-06-20 16:04:57,259 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:04:57,259 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [125204971] [2024-06-20 16:04:57,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:04:57,259 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:04:57,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:04:58,162 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:04:58,163 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:04:58,163 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [125204971] [2024-06-20 16:04:58,163 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [125204971] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:04:58,163 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:04:58,163 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:04:58,163 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [154614315] [2024-06-20 16:04:58,163 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:04:58,163 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:04:58,163 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:04:58,164 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:04:58,164 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:04:58,266 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-20 16:04:58,266 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 179 transitions, 1712 flow. Second operand has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:04:58,266 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:04:58,266 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-20 16:04:58,267 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:04:58,885 INFO L124 PetriNetUnfolderBase]: 2067/3144 cut-off events. [2024-06-20 16:04:58,885 INFO L125 PetriNetUnfolderBase]: For 104913/104913 co-relation queries the response was YES. [2024-06-20 16:04:58,896 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22213 conditions, 3144 events. 2067/3144 cut-off events. For 104913/104913 co-relation queries the response was YES. Maximal size of possible extension queue 148. Compared 15722 event pairs, 489 based on Foata normal form. 36/3179 useless extension candidates. Maximal degree in co-relation 22158. Up to 2729 conditions per place. [2024-06-20 16:04:58,906 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 170 selfloop transitions, 45 changer transitions 0/219 dead transitions. [2024-06-20 16:04:58,906 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 133 places, 219 transitions, 2461 flow [2024-06-20 16:04:58,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:04:58,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:04:58,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 174 transitions. [2024-06-20 16:04:58,907 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4715447154471545 [2024-06-20 16:04:58,907 INFO L175 Difference]: Start difference. First operand has 125 places, 179 transitions, 1712 flow. Second operand 9 states and 174 transitions. [2024-06-20 16:04:58,908 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 133 places, 219 transitions, 2461 flow [2024-06-20 16:04:58,972 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 126 places, 219 transitions, 2274 flow, removed 50 selfloop flow, removed 7 redundant places. [2024-06-20 16:04:58,974 INFO L231 Difference]: Finished difference. Result has 127 places, 182 transitions, 1711 flow [2024-06-20 16:04:58,975 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1525, PETRI_DIFFERENCE_MINUEND_PLACES=118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=179, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=134, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1711, PETRI_PLACES=127, PETRI_TRANSITIONS=182} [2024-06-20 16:04:58,975 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 85 predicate places. [2024-06-20 16:04:58,975 INFO L495 AbstractCegarLoop]: Abstraction has has 127 places, 182 transitions, 1711 flow [2024-06-20 16:04:58,975 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:04:58,975 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:04:58,975 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:04:58,975 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-20 16:04:58,975 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)] === [2024-06-20 16:04:58,976 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:04:58,976 INFO L85 PathProgramCache]: Analyzing trace with hash 1857264615, now seen corresponding path program 1 times [2024-06-20 16:04:58,976 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:04:58,976 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1573364340] [2024-06-20 16:04:58,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:04:58,976 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:04:58,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:04:59,597 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:04:59,597 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:04:59,597 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1573364340] [2024-06-20 16:04:59,597 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1573364340] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:04:59,597 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:04:59,597 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 16:04:59,597 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2089581128] [2024-06-20 16:04:59,597 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:04:59,598 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 16:04:59,598 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:04:59,598 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 16:04:59,598 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-20 16:04:59,650 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-20 16:04:59,650 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 127 places, 182 transitions, 1711 flow. Second operand has 8 states, 8 states have (on average 10.625) internal successors, (85), 8 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:04:59,650 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:04:59,650 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-20 16:04:59,650 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:05:00,305 INFO L124 PetriNetUnfolderBase]: 2117/3222 cut-off events. [2024-06-20 16:05:00,306 INFO L125 PetriNetUnfolderBase]: For 101753/101753 co-relation queries the response was YES. [2024-06-20 16:05:00,317 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23100 conditions, 3222 events. 2117/3222 cut-off events. For 101753/101753 co-relation queries the response was YES. Maximal size of possible extension queue 142. Compared 16003 event pairs, 496 based on Foata normal form. 2/3223 useless extension candidates. Maximal degree in co-relation 23044. Up to 3078 conditions per place. [2024-06-20 16:05:00,331 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 180 selfloop transitions, 33 changer transitions 0/217 dead transitions. [2024-06-20 16:05:00,331 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 133 places, 217 transitions, 2512 flow [2024-06-20 16:05:00,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 16:05:00,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 16:05:00,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 124 transitions. [2024-06-20 16:05:00,332 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43205574912891986 [2024-06-20 16:05:00,332 INFO L175 Difference]: Start difference. First operand has 127 places, 182 transitions, 1711 flow. Second operand 7 states and 124 transitions. [2024-06-20 16:05:00,332 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 133 places, 217 transitions, 2512 flow [2024-06-20 16:05:00,422 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 126 places, 217 transitions, 2388 flow, removed 12 selfloop flow, removed 7 redundant places. [2024-06-20 16:05:00,424 INFO L231 Difference]: Finished difference. Result has 129 places, 199 transitions, 1877 flow [2024-06-20 16:05:00,424 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1605, PETRI_DIFFERENCE_MINUEND_PLACES=120, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=182, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=163, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1877, PETRI_PLACES=129, PETRI_TRANSITIONS=199} [2024-06-20 16:05:00,425 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 87 predicate places. [2024-06-20 16:05:00,425 INFO L495 AbstractCegarLoop]: Abstraction has has 129 places, 199 transitions, 1877 flow [2024-06-20 16:05:00,425 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.625) internal successors, (85), 8 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:05:00,425 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:05:00,425 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:05:00,425 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-20 16:05:00,425 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:05:00,425 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:05:00,426 INFO L85 PathProgramCache]: Analyzing trace with hash 186051486, now seen corresponding path program 4 times [2024-06-20 16:05:00,426 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:05:00,426 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [466246534] [2024-06-20 16:05:00,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:05:00,426 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:05:00,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:05:01,274 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:05:01,274 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:05:01,275 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [466246534] [2024-06-20 16:05:01,275 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [466246534] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:05:01,275 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:05:01,275 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:05:01,275 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1489427636] [2024-06-20 16:05:01,275 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:05:01,275 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:05:01,276 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:05:01,276 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:05:01,276 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:05:01,419 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 16:05:01,419 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 129 places, 199 transitions, 1877 flow. Second operand has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:05:01,419 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:05:01,420 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 16:05:01,420 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:05:02,050 INFO L124 PetriNetUnfolderBase]: 2016/3120 cut-off events. [2024-06-20 16:05:02,051 INFO L125 PetriNetUnfolderBase]: For 100397/100407 co-relation queries the response was YES. [2024-06-20 16:05:02,061 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22012 conditions, 3120 events. 2016/3120 cut-off events. For 100397/100407 co-relation queries the response was YES. Maximal size of possible extension queue 145. Compared 15967 event pairs, 459 based on Foata normal form. 14/3133 useless extension candidates. Maximal degree in co-relation 21953. Up to 2765 conditions per place. [2024-06-20 16:05:02,072 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 163 selfloop transitions, 25 changer transitions 0/227 dead transitions. [2024-06-20 16:05:02,072 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 136 places, 227 transitions, 2399 flow [2024-06-20 16:05:02,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:05:02,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:05:02,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 149 transitions. [2024-06-20 16:05:02,073 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45426829268292684 [2024-06-20 16:05:02,073 INFO L175 Difference]: Start difference. First operand has 129 places, 199 transitions, 1877 flow. Second operand 8 states and 149 transitions. [2024-06-20 16:05:02,073 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 136 places, 227 transitions, 2399 flow [2024-06-20 16:05:02,162 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 134 places, 227 transitions, 2343 flow, removed 14 selfloop flow, removed 2 redundant places. [2024-06-20 16:05:02,164 INFO L231 Difference]: Finished difference. Result has 136 places, 203 transitions, 1969 flow [2024-06-20 16:05:02,164 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1821, PETRI_DIFFERENCE_MINUEND_PLACES=127, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=199, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=175, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1969, PETRI_PLACES=136, PETRI_TRANSITIONS=203} [2024-06-20 16:05:02,165 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 94 predicate places. [2024-06-20 16:05:02,165 INFO L495 AbstractCegarLoop]: Abstraction has has 136 places, 203 transitions, 1969 flow [2024-06-20 16:05:02,165 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:05:02,165 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:05:02,165 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:05:02,165 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-20 16:05:02,165 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:05:02,166 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:05:02,166 INFO L85 PathProgramCache]: Analyzing trace with hash 300875582, now seen corresponding path program 2 times [2024-06-20 16:05:02,166 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:05:02,166 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2023032594] [2024-06-20 16:05:02,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:05:02,166 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:05:02,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:05:03,006 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:05:03,006 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:05:03,006 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2023032594] [2024-06-20 16:05:03,006 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2023032594] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:05:03,007 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:05:03,007 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:05:03,007 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1757695083] [2024-06-20 16:05:03,007 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:05:03,007 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:05:03,007 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:05:03,007 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:05:03,007 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:05:03,106 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-20 16:05:03,106 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 136 places, 203 transitions, 1969 flow. Second operand has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:05:03,106 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:05:03,106 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-20 16:05:03,106 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:05:03,786 INFO L124 PetriNetUnfolderBase]: 2261/3463 cut-off events. [2024-06-20 16:05:03,786 INFO L125 PetriNetUnfolderBase]: For 130282/130290 co-relation queries the response was YES. [2024-06-20 16:05:03,798 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25008 conditions, 3463 events. 2261/3463 cut-off events. For 130282/130290 co-relation queries the response was YES. Maximal size of possible extension queue 161. Compared 17733 event pairs, 498 based on Foata normal form. 44/3506 useless extension candidates. Maximal degree in co-relation 24946. Up to 2797 conditions per place. [2024-06-20 16:05:03,812 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 138 selfloop transitions, 103 changer transitions 0/245 dead transitions. [2024-06-20 16:05:03,812 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 145 places, 245 transitions, 2795 flow [2024-06-20 16:05:03,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 16:05:03,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 16:05:03,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 194 transitions. [2024-06-20 16:05:03,813 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47317073170731705 [2024-06-20 16:05:03,813 INFO L175 Difference]: Start difference. First operand has 136 places, 203 transitions, 1969 flow. Second operand 10 states and 194 transitions. [2024-06-20 16:05:03,813 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 145 places, 245 transitions, 2795 flow [2024-06-20 16:05:03,921 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 140 places, 245 transitions, 2680 flow, removed 35 selfloop flow, removed 5 redundant places. [2024-06-20 16:05:03,924 INFO L231 Difference]: Finished difference. Result has 141 places, 206 transitions, 2164 flow [2024-06-20 16:05:03,924 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1854, PETRI_DIFFERENCE_MINUEND_PLACES=131, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=203, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=100, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2164, PETRI_PLACES=141, PETRI_TRANSITIONS=206} [2024-06-20 16:05:03,924 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 99 predicate places. [2024-06-20 16:05:03,925 INFO L495 AbstractCegarLoop]: Abstraction has has 141 places, 206 transitions, 2164 flow [2024-06-20 16:05:03,925 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:05:03,925 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:05:03,925 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:05:03,925 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-20 16:05:03,925 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:05:03,925 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:05:03,926 INFO L85 PathProgramCache]: Analyzing trace with hash 71186724, now seen corresponding path program 3 times [2024-06-20 16:05:03,926 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:05:03,926 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [918144731] [2024-06-20 16:05:03,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:05:03,926 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:05:03,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:05:04,814 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:05:04,814 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:05:04,814 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [918144731] [2024-06-20 16:05:04,814 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [918144731] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:05:04,814 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:05:04,814 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:05:04,814 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [7128070] [2024-06-20 16:05:04,815 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:05:04,815 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:05:04,815 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:05:04,815 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:05:04,815 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:05:04,916 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-20 16:05:04,916 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 141 places, 206 transitions, 2164 flow. Second operand has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:05:04,916 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:05:04,917 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-20 16:05:04,917 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:05:05,568 INFO L124 PetriNetUnfolderBase]: 2287/3503 cut-off events. [2024-06-20 16:05:05,568 INFO L125 PetriNetUnfolderBase]: For 127301/127305 co-relation queries the response was YES. [2024-06-20 16:05:05,581 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26205 conditions, 3503 events. 2287/3503 cut-off events. For 127301/127305 co-relation queries the response was YES. Maximal size of possible extension queue 164. Compared 18048 event pairs, 496 based on Foata normal form. 3/3504 useless extension candidates. Maximal degree in co-relation 26142. Up to 2897 conditions per place. [2024-06-20 16:05:05,592 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 106 selfloop transitions, 134 changer transitions 0/244 dead transitions. [2024-06-20 16:05:05,592 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 149 places, 244 transitions, 3184 flow [2024-06-20 16:05:05,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:05:05,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:05:05,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 174 transitions. [2024-06-20 16:05:05,593 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4715447154471545 [2024-06-20 16:05:05,593 INFO L175 Difference]: Start difference. First operand has 141 places, 206 transitions, 2164 flow. Second operand 9 states and 174 transitions. [2024-06-20 16:05:05,594 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 149 places, 244 transitions, 3184 flow [2024-06-20 16:05:05,723 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 141 places, 244 transitions, 2954 flow, removed 16 selfloop flow, removed 8 redundant places. [2024-06-20 16:05:05,726 INFO L231 Difference]: Finished difference. Result has 142 places, 214 transitions, 2459 flow [2024-06-20 16:05:05,726 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1934, PETRI_DIFFERENCE_MINUEND_PLACES=133, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=206, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=130, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2459, PETRI_PLACES=142, PETRI_TRANSITIONS=214} [2024-06-20 16:05:05,727 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 100 predicate places. [2024-06-20 16:05:05,727 INFO L495 AbstractCegarLoop]: Abstraction has has 142 places, 214 transitions, 2459 flow [2024-06-20 16:05:05,727 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:05:05,727 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:05:05,727 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:05:05,727 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-20 16:05:05,727 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:05:05,727 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:05:05,727 INFO L85 PathProgramCache]: Analyzing trace with hash 64699974, now seen corresponding path program 4 times [2024-06-20 16:05:05,727 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:05:05,727 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1675094320] [2024-06-20 16:05:05,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:05:05,728 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:05:05,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:05:06,650 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:05:06,650 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:05:06,650 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1675094320] [2024-06-20 16:05:06,650 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1675094320] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:05:06,650 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:05:06,651 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:05:06,651 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1518500843] [2024-06-20 16:05:06,651 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:05:06,651 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:05:06,651 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:05:06,651 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:05:06,651 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:05:06,753 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-20 16:05:06,753 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 142 places, 214 transitions, 2459 flow. Second operand has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:05:06,753 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:05:06,753 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-20 16:05:06,754 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:05:07,490 INFO L124 PetriNetUnfolderBase]: 2305/3537 cut-off events. [2024-06-20 16:05:07,490 INFO L125 PetriNetUnfolderBase]: For 131820/131824 co-relation queries the response was YES. [2024-06-20 16:05:07,503 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26838 conditions, 3537 events. 2305/3537 cut-off events. For 131820/131824 co-relation queries the response was YES. Maximal size of possible extension queue 166. Compared 18331 event pairs, 504 based on Foata normal form. 3/3538 useless extension candidates. Maximal degree in co-relation 26774. Up to 3059 conditions per place. [2024-06-20 16:05:07,514 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 156 selfloop transitions, 89 changer transitions 0/249 dead transitions. [2024-06-20 16:05:07,514 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 150 places, 249 transitions, 3347 flow [2024-06-20 16:05:07,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:05:07,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:05:07,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 173 transitions. [2024-06-20 16:05:07,515 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46883468834688347 [2024-06-20 16:05:07,516 INFO L175 Difference]: Start difference. First operand has 142 places, 214 transitions, 2459 flow. Second operand 9 states and 173 transitions. [2024-06-20 16:05:07,516 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 150 places, 249 transitions, 3347 flow [2024-06-20 16:05:07,624 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 145 places, 249 transitions, 3083 flow, removed 68 selfloop flow, removed 5 redundant places. [2024-06-20 16:05:07,627 INFO L231 Difference]: Finished difference. Result has 146 places, 218 transitions, 2518 flow [2024-06-20 16:05:07,627 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2207, PETRI_DIFFERENCE_MINUEND_PLACES=137, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=214, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=85, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=125, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2518, PETRI_PLACES=146, PETRI_TRANSITIONS=218} [2024-06-20 16:05:07,627 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 104 predicate places. [2024-06-20 16:05:07,627 INFO L495 AbstractCegarLoop]: Abstraction has has 146 places, 218 transitions, 2518 flow [2024-06-20 16:05:07,627 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:05:07,627 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:05:07,627 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:05:07,628 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-20 16:05:07,628 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:05:07,628 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:05:07,628 INFO L85 PathProgramCache]: Analyzing trace with hash -950730062, now seen corresponding path program 3 times [2024-06-20 16:05:07,628 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:05:07,628 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1175041602] [2024-06-20 16:05:07,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:05:07,628 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:05:07,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:05:08,536 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:05:08,536 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:05:08,536 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1175041602] [2024-06-20 16:05:08,537 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1175041602] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:05:08,537 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:05:08,537 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:05:08,537 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [319156823] [2024-06-20 16:05:08,537 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:05:08,537 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:05:08,537 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:05:08,537 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:05:08,538 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:05:08,614 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-20 16:05:08,614 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 146 places, 218 transitions, 2518 flow. Second operand has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:05:08,614 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:05:08,614 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-20 16:05:08,614 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:05:09,294 INFO L124 PetriNetUnfolderBase]: 2457/3793 cut-off events. [2024-06-20 16:05:09,295 INFO L125 PetriNetUnfolderBase]: For 161252/161260 co-relation queries the response was YES. [2024-06-20 16:05:09,310 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29204 conditions, 3793 events. 2457/3793 cut-off events. For 161252/161260 co-relation queries the response was YES. Maximal size of possible extension queue 182. Compared 20122 event pairs, 519 based on Foata normal form. 44/3836 useless extension candidates. Maximal degree in co-relation 29138. Up to 3202 conditions per place. [2024-06-20 16:05:09,325 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 185 selfloop transitions, 69 changer transitions 0/258 dead transitions. [2024-06-20 16:05:09,326 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 154 places, 258 transitions, 3461 flow [2024-06-20 16:05:09,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:05:09,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:05:09,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 176 transitions. [2024-06-20 16:05:09,327 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47696476964769646 [2024-06-20 16:05:09,327 INFO L175 Difference]: Start difference. First operand has 146 places, 218 transitions, 2518 flow. Second operand 9 states and 176 transitions. [2024-06-20 16:05:09,327 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 154 places, 258 transitions, 3461 flow [2024-06-20 16:05:09,508 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 147 places, 258 transitions, 3188 flow, removed 50 selfloop flow, removed 7 redundant places. [2024-06-20 16:05:09,511 INFO L231 Difference]: Finished difference. Result has 148 places, 221 transitions, 2496 flow [2024-06-20 16:05:09,511 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2245, PETRI_DIFFERENCE_MINUEND_PLACES=139, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=218, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=149, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2496, PETRI_PLACES=148, PETRI_TRANSITIONS=221} [2024-06-20 16:05:09,511 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 106 predicate places. [2024-06-20 16:05:09,511 INFO L495 AbstractCegarLoop]: Abstraction has has 148 places, 221 transitions, 2496 flow [2024-06-20 16:05:09,511 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:05:09,511 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:05:09,512 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:05:09,512 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-20 16:05:09,512 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:05:09,512 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:05:09,512 INFO L85 PathProgramCache]: Analyzing trace with hash 71195342, now seen corresponding path program 4 times [2024-06-20 16:05:09,512 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:05:09,512 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [218914186] [2024-06-20 16:05:09,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:05:09,512 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:05:09,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:05:10,476 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:05:10,476 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:05:10,476 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [218914186] [2024-06-20 16:05:10,476 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [218914186] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:05:10,476 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:05:10,476 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:05:10,476 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2061846182] [2024-06-20 16:05:10,476 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:05:10,476 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:05:10,477 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:05:10,477 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:05:10,477 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:05:10,583 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-20 16:05:10,583 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 148 places, 221 transitions, 2496 flow. Second operand has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:05:10,583 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:05:10,583 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-20 16:05:10,583 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:05:11,289 INFO L124 PetriNetUnfolderBase]: 2460/3798 cut-off events. [2024-06-20 16:05:11,289 INFO L125 PetriNetUnfolderBase]: For 154197/154205 co-relation queries the response was YES. [2024-06-20 16:05:11,305 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29432 conditions, 3798 events. 2460/3798 cut-off events. For 154197/154205 co-relation queries the response was YES. Maximal size of possible extension queue 184. Compared 20093 event pairs, 468 based on Foata normal form. 14/3811 useless extension candidates. Maximal degree in co-relation 29365. Up to 2637 conditions per place. [2024-06-20 16:05:11,319 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 142 selfloop transitions, 113 changer transitions 0/259 dead transitions. [2024-06-20 16:05:11,319 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 156 places, 259 transitions, 3371 flow [2024-06-20 16:05:11,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:05:11,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:05:11,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 176 transitions. [2024-06-20 16:05:11,320 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47696476964769646 [2024-06-20 16:05:11,320 INFO L175 Difference]: Start difference. First operand has 148 places, 221 transitions, 2496 flow. Second operand 9 states and 176 transitions. [2024-06-20 16:05:11,320 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 156 places, 259 transitions, 3371 flow [2024-06-20 16:05:11,445 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 149 places, 259 transitions, 3202 flow, removed 19 selfloop flow, removed 7 redundant places. [2024-06-20 16:05:11,448 INFO L231 Difference]: Finished difference. Result has 150 places, 224 transitions, 2669 flow [2024-06-20 16:05:11,448 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2327, PETRI_DIFFERENCE_MINUEND_PLACES=141, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=221, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=110, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=108, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2669, PETRI_PLACES=150, PETRI_TRANSITIONS=224} [2024-06-20 16:05:11,448 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 108 predicate places. [2024-06-20 16:05:11,448 INFO L495 AbstractCegarLoop]: Abstraction has has 150 places, 224 transitions, 2669 flow [2024-06-20 16:05:11,448 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:05:11,448 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:05:11,449 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:05:11,449 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-20 16:05:11,449 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:05:11,449 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:05:11,449 INFO L85 PathProgramCache]: Analyzing trace with hash 192492046, now seen corresponding path program 5 times [2024-06-20 16:05:11,449 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:05:11,449 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1135189590] [2024-06-20 16:05:11,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:05:11,449 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:05:11,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:05:12,376 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:05:12,377 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:05:12,377 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1135189590] [2024-06-20 16:05:12,377 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1135189590] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:05:12,377 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:05:12,377 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:05:12,377 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1598066944] [2024-06-20 16:05:12,377 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:05:12,377 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:05:12,377 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:05:12,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:05:12,378 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:05:12,458 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-20 16:05:12,458 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 150 places, 224 transitions, 2669 flow. Second operand has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:05:12,458 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:05:12,458 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-20 16:05:12,459 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:05:13,275 INFO L124 PetriNetUnfolderBase]: 2454/3782 cut-off events. [2024-06-20 16:05:13,276 INFO L125 PetriNetUnfolderBase]: For 153246/153250 co-relation queries the response was YES. [2024-06-20 16:05:13,289 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29575 conditions, 3782 events. 2454/3782 cut-off events. For 153246/153250 co-relation queries the response was YES. Maximal size of possible extension queue 183. Compared 20089 event pairs, 526 based on Foata normal form. 3/3783 useless extension candidates. Maximal degree in co-relation 29507. Up to 3304 conditions per place. [2024-06-20 16:05:13,302 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 147 selfloop transitions, 102 changer transitions 0/253 dead transitions. [2024-06-20 16:05:13,302 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 158 places, 253 transitions, 3376 flow [2024-06-20 16:05:13,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:05:13,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:05:13,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 172 transitions. [2024-06-20 16:05:13,303 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46612466124661245 [2024-06-20 16:05:13,303 INFO L175 Difference]: Start difference. First operand has 150 places, 224 transitions, 2669 flow. Second operand 9 states and 172 transitions. [2024-06-20 16:05:13,303 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 158 places, 253 transitions, 3376 flow [2024-06-20 16:05:13,452 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 151 places, 253 transitions, 3010 flow, removed 72 selfloop flow, removed 7 redundant places. [2024-06-20 16:05:13,455 INFO L231 Difference]: Finished difference. Result has 152 places, 224 transitions, 2516 flow [2024-06-20 16:05:13,456 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2303, PETRI_DIFFERENCE_MINUEND_PLACES=143, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=224, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=102, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=122, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2516, PETRI_PLACES=152, PETRI_TRANSITIONS=224} [2024-06-20 16:05:13,456 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 110 predicate places. [2024-06-20 16:05:13,456 INFO L495 AbstractCegarLoop]: Abstraction has has 152 places, 224 transitions, 2516 flow [2024-06-20 16:05:13,456 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:05:13,456 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:05:13,456 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:05:13,456 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-20 16:05:13,456 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)] === [2024-06-20 16:05:13,457 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:05:13,457 INFO L85 PathProgramCache]: Analyzing trace with hash -1921634521, now seen corresponding path program 2 times [2024-06-20 16:05:13,457 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:05:13,457 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [556607522] [2024-06-20 16:05:13,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:05:13,457 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:05:13,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:05:14,064 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:05:14,064 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:05:14,064 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [556607522] [2024-06-20 16:05:14,064 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [556607522] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:05:14,064 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:05:14,064 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 16:05:14,064 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1028047971] [2024-06-20 16:05:14,065 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:05:14,065 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 16:05:14,065 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:05:14,065 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 16:05:14,065 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-20 16:05:14,111 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-20 16:05:14,112 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 152 places, 224 transitions, 2516 flow. Second operand has 8 states, 8 states have (on average 10.625) internal successors, (85), 8 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:05:14,112 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:05:14,112 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-20 16:05:14,112 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:05:14,798 INFO L124 PetriNetUnfolderBase]: 2448/3775 cut-off events. [2024-06-20 16:05:14,799 INFO L125 PetriNetUnfolderBase]: For 153928/153930 co-relation queries the response was YES. [2024-06-20 16:05:14,814 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29025 conditions, 3775 events. 2448/3775 cut-off events. For 153928/153930 co-relation queries the response was YES. Maximal size of possible extension queue 177. Compared 19954 event pairs, 550 based on Foata normal form. 4/3778 useless extension candidates. Maximal degree in co-relation 28956. Up to 3617 conditions per place. [2024-06-20 16:05:14,827 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 196 selfloop transitions, 35 changer transitions 0/235 dead transitions. [2024-06-20 16:05:14,827 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 158 places, 235 transitions, 3089 flow [2024-06-20 16:05:14,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 16:05:14,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 16:05:14,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 118 transitions. [2024-06-20 16:05:14,828 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41114982578397213 [2024-06-20 16:05:14,828 INFO L175 Difference]: Start difference. First operand has 152 places, 224 transitions, 2516 flow. Second operand 7 states and 118 transitions. [2024-06-20 16:05:14,828 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 158 places, 235 transitions, 3089 flow [2024-06-20 16:05:14,955 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 150 places, 235 transitions, 2760 flow, removed 40 selfloop flow, removed 8 redundant places. [2024-06-20 16:05:14,958 INFO L231 Difference]: Finished difference. Result has 151 places, 224 transitions, 2265 flow [2024-06-20 16:05:14,958 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2187, PETRI_DIFFERENCE_MINUEND_PLACES=144, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=224, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=189, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2265, PETRI_PLACES=151, PETRI_TRANSITIONS=224} [2024-06-20 16:05:14,958 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 109 predicate places. [2024-06-20 16:05:14,958 INFO L495 AbstractCegarLoop]: Abstraction has has 151 places, 224 transitions, 2265 flow [2024-06-20 16:05:14,958 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.625) internal successors, (85), 8 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:05:14,958 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:05:14,958 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:05:14,958 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-20 16:05:14,959 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)] === [2024-06-20 16:05:14,959 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:05:14,959 INFO L85 PathProgramCache]: Analyzing trace with hash 826958759, now seen corresponding path program 3 times [2024-06-20 16:05:14,959 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:05:14,959 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1177318762] [2024-06-20 16:05:14,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:05:14,959 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:05:14,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:05:15,419 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:05:15,419 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:05:15,419 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1177318762] [2024-06-20 16:05:15,419 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1177318762] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:05:15,419 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:05:15,419 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 16:05:15,419 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1196366508] [2024-06-20 16:05:15,419 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:05:15,419 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 16:05:15,419 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:05:15,420 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 16:05:15,420 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-20 16:05:15,476 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-20 16:05:15,476 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 151 places, 224 transitions, 2265 flow. Second operand has 7 states, 7 states have (on average 10.857142857142858) internal successors, (76), 7 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:05:15,476 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:05:15,476 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-20 16:05:15,477 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:05:16,111 INFO L124 PetriNetUnfolderBase]: 2466/3803 cut-off events. [2024-06-20 16:05:16,111 INFO L125 PetriNetUnfolderBase]: For 157711/157713 co-relation queries the response was YES. [2024-06-20 16:05:16,126 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28762 conditions, 3803 events. 2466/3803 cut-off events. For 157711/157713 co-relation queries the response was YES. Maximal size of possible extension queue 183. Compared 20140 event pairs, 526 based on Foata normal form. 4/3806 useless extension candidates. Maximal degree in co-relation 28692. Up to 3631 conditions per place. [2024-06-20 16:05:16,141 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 206 selfloop transitions, 44 changer transitions 0/254 dead transitions. [2024-06-20 16:05:16,141 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 157 places, 254 transitions, 2959 flow [2024-06-20 16:05:16,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 16:05:16,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 16:05:16,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 128 transitions. [2024-06-20 16:05:16,142 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.445993031358885 [2024-06-20 16:05:16,142 INFO L175 Difference]: Start difference. First operand has 151 places, 224 transitions, 2265 flow. Second operand 7 states and 128 transitions. [2024-06-20 16:05:16,142 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 157 places, 254 transitions, 2959 flow [2024-06-20 16:05:16,286 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 154 places, 254 transitions, 2887 flow, removed 16 selfloop flow, removed 3 redundant places. [2024-06-20 16:05:16,288 INFO L231 Difference]: Finished difference. Result has 157 places, 235 transitions, 2461 flow [2024-06-20 16:05:16,289 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2201, PETRI_DIFFERENCE_MINUEND_PLACES=148, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=224, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=188, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2461, PETRI_PLACES=157, PETRI_TRANSITIONS=235} [2024-06-20 16:05:16,289 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 115 predicate places. [2024-06-20 16:05:16,289 INFO L495 AbstractCegarLoop]: Abstraction has has 157 places, 235 transitions, 2461 flow [2024-06-20 16:05:16,289 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.857142857142858) internal successors, (76), 7 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:05:16,289 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:05:16,290 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:05:16,290 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-20 16:05:16,290 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)] === [2024-06-20 16:05:16,290 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:05:16,290 INFO L85 PathProgramCache]: Analyzing trace with hash -305761585, now seen corresponding path program 1 times [2024-06-20 16:05:16,290 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:05:16,290 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1967892538] [2024-06-20 16:05:16,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:05:16,291 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:05:16,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:05:16,841 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:05:16,841 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:05:16,841 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1967892538] [2024-06-20 16:05:16,841 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1967892538] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:05:16,841 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:05:16,842 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 16:05:16,842 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1791119366] [2024-06-20 16:05:16,842 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:05:16,842 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 16:05:16,842 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:05:16,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 16:05:16,842 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-20 16:05:16,894 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 16:05:16,894 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 157 places, 235 transitions, 2461 flow. Second operand has 7 states, 7 states have (on average 11.857142857142858) internal successors, (83), 7 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:05:16,894 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:05:16,894 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 16:05:16,894 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:05:17,396 INFO L124 PetriNetUnfolderBase]: 2264/3596 cut-off events. [2024-06-20 16:05:17,396 INFO L125 PetriNetUnfolderBase]: For 139563/139565 co-relation queries the response was YES. [2024-06-20 16:05:17,410 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26737 conditions, 3596 events. 2264/3596 cut-off events. For 139563/139565 co-relation queries the response was YES. Maximal size of possible extension queue 177. Compared 19620 event pairs, 463 based on Foata normal form. 2/3597 useless extension candidates. Maximal degree in co-relation 26664. Up to 3390 conditions per place. [2024-06-20 16:05:17,424 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 225 selfloop transitions, 20 changer transitions 0/250 dead transitions. [2024-06-20 16:05:17,424 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 162 places, 250 transitions, 3090 flow [2024-06-20 16:05:17,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 16:05:17,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 16:05:17,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 113 transitions. [2024-06-20 16:05:17,425 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45934959349593496 [2024-06-20 16:05:17,425 INFO L175 Difference]: Start difference. First operand has 157 places, 235 transitions, 2461 flow. Second operand 6 states and 113 transitions. [2024-06-20 16:05:17,425 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 162 places, 250 transitions, 3090 flow [2024-06-20 16:05:17,576 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 157 places, 250 transitions, 3017 flow, removed 1 selfloop flow, removed 5 redundant places. [2024-06-20 16:05:17,579 INFO L231 Difference]: Finished difference. Result has 158 places, 238 transitions, 2471 flow [2024-06-20 16:05:17,579 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2388, PETRI_DIFFERENCE_MINUEND_PLACES=152, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=235, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=217, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2471, PETRI_PLACES=158, PETRI_TRANSITIONS=238} [2024-06-20 16:05:17,580 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 116 predicate places. [2024-06-20 16:05:17,580 INFO L495 AbstractCegarLoop]: Abstraction has has 158 places, 238 transitions, 2471 flow [2024-06-20 16:05:17,580 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.857142857142858) internal successors, (83), 7 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:05:17,580 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:05:17,580 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:05:17,580 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-20 16:05:17,580 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)] === [2024-06-20 16:05:17,581 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:05:17,581 INFO L85 PathProgramCache]: Analyzing trace with hash -1921628569, now seen corresponding path program 2 times [2024-06-20 16:05:17,581 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:05:17,581 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1163640330] [2024-06-20 16:05:17,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:05:17,581 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:05:17,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:05:18,105 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:05:18,105 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:05:18,105 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1163640330] [2024-06-20 16:05:18,105 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1163640330] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:05:18,105 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:05:18,105 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 16:05:18,105 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2107808176] [2024-06-20 16:05:18,105 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:05:18,106 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 16:05:18,106 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:05:18,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 16:05:18,106 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-20 16:05:18,166 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 16:05:18,166 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 158 places, 238 transitions, 2471 flow. Second operand has 7 states, 7 states have (on average 11.857142857142858) internal successors, (83), 7 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:05:18,166 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:05:18,166 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 16:05:18,166 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:05:18,819 INFO L124 PetriNetUnfolderBase]: 2221/3524 cut-off events. [2024-06-20 16:05:18,819 INFO L125 PetriNetUnfolderBase]: For 142630/142632 co-relation queries the response was YES. [2024-06-20 16:05:18,835 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26375 conditions, 3524 events. 2221/3524 cut-off events. For 142630/142632 co-relation queries the response was YES. Maximal size of possible extension queue 174. Compared 19092 event pairs, 459 based on Foata normal form. 1/3524 useless extension candidates. Maximal degree in co-relation 26302. Up to 3352 conditions per place. [2024-06-20 16:05:18,848 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 229 selfloop transitions, 12 changer transitions 0/246 dead transitions. [2024-06-20 16:05:18,848 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 163 places, 246 transitions, 2975 flow [2024-06-20 16:05:18,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 16:05:18,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 16:05:18,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 105 transitions. [2024-06-20 16:05:18,849 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4268292682926829 [2024-06-20 16:05:18,849 INFO L175 Difference]: Start difference. First operand has 158 places, 238 transitions, 2471 flow. Second operand 6 states and 105 transitions. [2024-06-20 16:05:18,849 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 163 places, 246 transitions, 2975 flow [2024-06-20 16:05:19,019 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 160 places, 246 transitions, 2944 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-06-20 16:05:19,022 INFO L231 Difference]: Finished difference. Result has 161 places, 238 transitions, 2470 flow [2024-06-20 16:05:19,022 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2440, PETRI_DIFFERENCE_MINUEND_PLACES=155, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=238, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=226, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2470, PETRI_PLACES=161, PETRI_TRANSITIONS=238} [2024-06-20 16:05:19,023 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 119 predicate places. [2024-06-20 16:05:19,023 INFO L495 AbstractCegarLoop]: Abstraction has has 161 places, 238 transitions, 2470 flow [2024-06-20 16:05:19,023 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.857142857142858) internal successors, (83), 7 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:05:19,023 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:05:19,023 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:05:19,023 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-20 16:05:19,024 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:05:19,024 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:05:19,024 INFO L85 PathProgramCache]: Analyzing trace with hash -71037896, now seen corresponding path program 1 times [2024-06-20 16:05:19,024 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:05:19,024 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [385345285] [2024-06-20 16:05:19,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:05:19,024 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:05:19,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:05:19,927 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:05:19,927 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:05:19,927 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [385345285] [2024-06-20 16:05:19,927 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [385345285] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:05:19,927 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:05:19,928 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:05:19,928 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1139957033] [2024-06-20 16:05:19,928 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:05:19,928 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:05:19,928 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:05:19,928 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:05:19,928 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:05:20,057 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-20 16:05:20,057 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 161 places, 238 transitions, 2470 flow. Second operand has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:05:20,057 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:05:20,057 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-20 16:05:20,057 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:05:20,805 INFO L124 PetriNetUnfolderBase]: 2453/3784 cut-off events. [2024-06-20 16:05:20,805 INFO L125 PetriNetUnfolderBase]: For 179100/179106 co-relation queries the response was YES. [2024-06-20 16:05:20,823 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29305 conditions, 3784 events. 2453/3784 cut-off events. For 179100/179106 co-relation queries the response was YES. Maximal size of possible extension queue 183. Compared 20022 event pairs, 477 based on Foata normal form. 12/3795 useless extension candidates. Maximal degree in co-relation 29231. Up to 3537 conditions per place. [2024-06-20 16:05:20,838 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 218 selfloop transitions, 53 changer transitions 0/275 dead transitions. [2024-06-20 16:05:20,838 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 169 places, 275 transitions, 3298 flow [2024-06-20 16:05:20,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:05:20,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:05:20,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 169 transitions. [2024-06-20 16:05:20,839 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45799457994579945 [2024-06-20 16:05:20,839 INFO L175 Difference]: Start difference. First operand has 161 places, 238 transitions, 2470 flow. Second operand 9 states and 169 transitions. [2024-06-20 16:05:20,839 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 169 places, 275 transitions, 3298 flow [2024-06-20 16:05:21,026 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 163 places, 275 transitions, 3249 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-06-20 16:05:21,029 INFO L231 Difference]: Finished difference. Result has 164 places, 241 transitions, 2641 flow [2024-06-20 16:05:21,030 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2421, PETRI_DIFFERENCE_MINUEND_PLACES=155, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=238, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=185, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2641, PETRI_PLACES=164, PETRI_TRANSITIONS=241} [2024-06-20 16:05:21,031 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 122 predicate places. [2024-06-20 16:05:21,031 INFO L495 AbstractCegarLoop]: Abstraction has has 164 places, 241 transitions, 2641 flow [2024-06-20 16:05:21,031 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:05:21,031 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:05:21,031 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:05:21,031 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-20 16:05:21,031 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:05:21,032 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:05:21,032 INFO L85 PathProgramCache]: Analyzing trace with hash 15650194, now seen corresponding path program 2 times [2024-06-20 16:05:21,032 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:05:21,032 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1074979085] [2024-06-20 16:05:21,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:05:21,032 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:05:21,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:05:21,945 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:05:21,945 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:05:21,945 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1074979085] [2024-06-20 16:05:21,945 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1074979085] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:05:21,945 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:05:21,945 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:05:21,945 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1075520041] [2024-06-20 16:05:21,945 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:05:21,946 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:05:21,946 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:05:21,946 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:05:21,946 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:05:22,026 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-20 16:05:22,026 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 164 places, 241 transitions, 2641 flow. Second operand has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:05:22,026 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:05:22,026 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-20 16:05:22,026 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:05:22,760 INFO L124 PetriNetUnfolderBase]: 2507/3866 cut-off events. [2024-06-20 16:05:22,761 INFO L125 PetriNetUnfolderBase]: For 191417/191423 co-relation queries the response was YES. [2024-06-20 16:05:22,779 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30813 conditions, 3866 events. 2507/3866 cut-off events. For 191417/191423 co-relation queries the response was YES. Maximal size of possible extension queue 192. Compared 20537 event pairs, 479 based on Foata normal form. 12/3877 useless extension candidates. Maximal degree in co-relation 30738. Up to 3535 conditions per place. [2024-06-20 16:05:22,794 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 223 selfloop transitions, 56 changer transitions 0/283 dead transitions. [2024-06-20 16:05:22,794 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 172 places, 283 transitions, 3643 flow [2024-06-20 16:05:22,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:05:22,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:05:22,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 171 transitions. [2024-06-20 16:05:22,795 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4634146341463415 [2024-06-20 16:05:22,795 INFO L175 Difference]: Start difference. First operand has 164 places, 241 transitions, 2641 flow. Second operand 9 states and 171 transitions. [2024-06-20 16:05:22,795 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 172 places, 283 transitions, 3643 flow [2024-06-20 16:05:22,986 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 165 places, 283 transitions, 3447 flow, removed 47 selfloop flow, removed 7 redundant places. [2024-06-20 16:05:22,989 INFO L231 Difference]: Finished difference. Result has 167 places, 247 transitions, 2758 flow [2024-06-20 16:05:22,989 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2445, PETRI_DIFFERENCE_MINUEND_PLACES=157, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=241, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=187, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2758, PETRI_PLACES=167, PETRI_TRANSITIONS=247} [2024-06-20 16:05:22,990 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 125 predicate places. [2024-06-20 16:05:22,990 INFO L495 AbstractCegarLoop]: Abstraction has has 167 places, 247 transitions, 2758 flow [2024-06-20 16:05:22,990 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:05:22,990 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:05:22,990 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:05:22,990 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-20 16:05:22,990 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:05:22,990 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:05:22,990 INFO L85 PathProgramCache]: Analyzing trace with hash -72915566, now seen corresponding path program 3 times [2024-06-20 16:05:22,990 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:05:22,990 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [443547605] [2024-06-20 16:05:22,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:05:22,991 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:05:22,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:05:23,794 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:05:23,794 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:05:23,794 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [443547605] [2024-06-20 16:05:23,794 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [443547605] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:05:23,794 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:05:23,794 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:05:23,794 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1280673102] [2024-06-20 16:05:23,794 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:05:23,794 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:05:23,794 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:05:23,795 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:05:23,795 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:05:23,880 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-20 16:05:23,880 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 167 places, 247 transitions, 2758 flow. Second operand has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:05:23,880 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:05:23,880 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-20 16:05:23,880 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:05:24,636 INFO L124 PetriNetUnfolderBase]: 2561/3948 cut-off events. [2024-06-20 16:05:24,636 INFO L125 PetriNetUnfolderBase]: For 204962/204968 co-relation queries the response was YES. [2024-06-20 16:05:24,654 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32162 conditions, 3948 events. 2561/3948 cut-off events. For 204962/204968 co-relation queries the response was YES. Maximal size of possible extension queue 198. Compared 20994 event pairs, 371 based on Foata normal form. 12/3959 useless extension candidates. Maximal degree in co-relation 32085. Up to 3630 conditions per place. [2024-06-20 16:05:24,668 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 238 selfloop transitions, 50 changer transitions 0/292 dead transitions. [2024-06-20 16:05:24,669 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 175 places, 292 transitions, 3850 flow [2024-06-20 16:05:24,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:05:24,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:05:24,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 170 transitions. [2024-06-20 16:05:24,670 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46070460704607047 [2024-06-20 16:05:24,670 INFO L175 Difference]: Start difference. First operand has 167 places, 247 transitions, 2758 flow. Second operand 9 states and 170 transitions. [2024-06-20 16:05:24,670 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 175 places, 292 transitions, 3850 flow [2024-06-20 16:05:24,912 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 170 places, 292 transitions, 3670 flow, removed 60 selfloop flow, removed 5 redundant places. [2024-06-20 16:05:24,916 INFO L231 Difference]: Finished difference. Result has 173 places, 255 transitions, 2955 flow [2024-06-20 16:05:24,916 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2578, PETRI_DIFFERENCE_MINUEND_PLACES=162, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=247, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=200, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2955, PETRI_PLACES=173, PETRI_TRANSITIONS=255} [2024-06-20 16:05:24,916 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 131 predicate places. [2024-06-20 16:05:24,916 INFO L495 AbstractCegarLoop]: Abstraction has has 173 places, 255 transitions, 2955 flow [2024-06-20 16:05:24,916 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:05:24,916 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:05:24,917 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:05:24,917 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-20 16:05:24,917 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:05:24,917 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:05:24,917 INFO L85 PathProgramCache]: Analyzing trace with hash 15804016, now seen corresponding path program 1 times [2024-06-20 16:05:24,917 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:05:24,917 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1981416095] [2024-06-20 16:05:24,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:05:24,917 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:05:24,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:05:26,028 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:05:26,028 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:05:26,028 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1981416095] [2024-06-20 16:05:26,028 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1981416095] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:05:26,028 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:05:26,028 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 16:05:26,028 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1905705397] [2024-06-20 16:05:26,028 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:05:26,029 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 16:05:26,029 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:05:26,029 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 16:05:26,029 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-20 16:05:26,126 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-20 16:05:26,127 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 173 places, 255 transitions, 2955 flow. Second operand has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:05:26,127 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:05:26,127 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-20 16:05:26,127 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:05:27,034 INFO L124 PetriNetUnfolderBase]: 2657/4108 cut-off events. [2024-06-20 16:05:27,035 INFO L125 PetriNetUnfolderBase]: For 241247/241253 co-relation queries the response was YES. [2024-06-20 16:05:27,052 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34226 conditions, 4108 events. 2657/4108 cut-off events. For 241247/241253 co-relation queries the response was YES. Maximal size of possible extension queue 210. Compared 22213 event pairs, 524 based on Foata normal form. 30/4137 useless extension candidates. Maximal degree in co-relation 34145. Up to 3738 conditions per place. [2024-06-20 16:05:27,067 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 238 selfloop transitions, 56 changer transitions 0/298 dead transitions. [2024-06-20 16:05:27,067 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 182 places, 298 transitions, 3897 flow [2024-06-20 16:05:27,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 16:05:27,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 16:05:27,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 188 transitions. [2024-06-20 16:05:27,068 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4585365853658537 [2024-06-20 16:05:27,068 INFO L175 Difference]: Start difference. First operand has 173 places, 255 transitions, 2955 flow. Second operand 10 states and 188 transitions. [2024-06-20 16:05:27,068 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 182 places, 298 transitions, 3897 flow [2024-06-20 16:05:27,345 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 178 places, 298 transitions, 3701 flow, removed 75 selfloop flow, removed 4 redundant places. [2024-06-20 16:05:27,348 INFO L231 Difference]: Finished difference. Result has 179 places, 257 transitions, 2987 flow [2024-06-20 16:05:27,348 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2759, PETRI_DIFFERENCE_MINUEND_PLACES=169, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=255, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=199, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2987, PETRI_PLACES=179, PETRI_TRANSITIONS=257} [2024-06-20 16:05:27,349 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 137 predicate places. [2024-06-20 16:05:27,349 INFO L495 AbstractCegarLoop]: Abstraction has has 179 places, 257 transitions, 2987 flow [2024-06-20 16:05:27,353 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:05:27,353 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:05:27,353 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:05:27,353 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-20 16:05:27,353 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:05:27,354 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:05:27,354 INFO L85 PathProgramCache]: Analyzing trace with hash -705290832, now seen corresponding path program 4 times [2024-06-20 16:05:27,354 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:05:27,354 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2122136787] [2024-06-20 16:05:27,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:05:27,354 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:05:27,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:05:28,211 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:05:28,211 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:05:28,212 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2122136787] [2024-06-20 16:05:28,212 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2122136787] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:05:28,213 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:05:28,213 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:05:28,213 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [134940595] [2024-06-20 16:05:28,213 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:05:28,213 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:05:28,214 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:05:28,214 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:05:28,214 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:05:28,355 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-20 16:05:28,355 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 179 places, 257 transitions, 2987 flow. Second operand has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:05:28,355 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:05:28,355 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-20 16:05:28,355 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:05:29,115 INFO L124 PetriNetUnfolderBase]: 2711/4190 cut-off events. [2024-06-20 16:05:29,115 INFO L125 PetriNetUnfolderBase]: For 241753/241759 co-relation queries the response was YES. [2024-06-20 16:05:29,138 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35317 conditions, 4190 events. 2711/4190 cut-off events. For 241753/241759 co-relation queries the response was YES. Maximal size of possible extension queue 216. Compared 22769 event pairs, 529 based on Foata normal form. 12/4201 useless extension candidates. Maximal degree in co-relation 35234. Up to 3849 conditions per place. [2024-06-20 16:05:29,154 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 251 selfloop transitions, 46 changer transitions 0/301 dead transitions. [2024-06-20 16:05:29,155 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 187 places, 301 transitions, 4210 flow [2024-06-20 16:05:29,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:05:29,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:05:29,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 170 transitions. [2024-06-20 16:05:29,155 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46070460704607047 [2024-06-20 16:05:29,156 INFO L175 Difference]: Start difference. First operand has 179 places, 257 transitions, 2987 flow. Second operand 9 states and 170 transitions. [2024-06-20 16:05:29,156 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 187 places, 301 transitions, 4210 flow [2024-06-20 16:05:29,458 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 179 places, 301 transitions, 4048 flow, removed 27 selfloop flow, removed 8 redundant places. [2024-06-20 16:05:29,461 INFO L231 Difference]: Finished difference. Result has 182 places, 265 transitions, 3201 flow [2024-06-20 16:05:29,461 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2825, PETRI_DIFFERENCE_MINUEND_PLACES=171, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=257, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=213, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3201, PETRI_PLACES=182, PETRI_TRANSITIONS=265} [2024-06-20 16:05:29,461 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 140 predicate places. [2024-06-20 16:05:29,462 INFO L495 AbstractCegarLoop]: Abstraction has has 182 places, 265 transitions, 3201 flow [2024-06-20 16:05:29,462 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:05:29,462 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:05:29,462 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:05:29,462 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-20 16:05:29,462 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:05:29,462 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:05:29,462 INFO L85 PathProgramCache]: Analyzing trace with hash -699572820, now seen corresponding path program 2 times [2024-06-20 16:05:29,462 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:05:29,462 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1207690994] [2024-06-20 16:05:29,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:05:29,463 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:05:29,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:05:30,756 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:05:30,756 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:05:30,756 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1207690994] [2024-06-20 16:05:30,756 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1207690994] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:05:30,757 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:05:30,757 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 16:05:30,757 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1682932005] [2024-06-20 16:05:30,757 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:05:30,757 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 16:05:30,757 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:05:30,758 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 16:05:30,758 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-06-20 16:05:30,889 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-20 16:05:30,889 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 182 places, 265 transitions, 3201 flow. Second operand has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:05:30,889 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:05:30,889 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-20 16:05:30,889 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:05:31,943 INFO L124 PetriNetUnfolderBase]: 2851/4426 cut-off events. [2024-06-20 16:05:31,943 INFO L125 PetriNetUnfolderBase]: For 279341/279347 co-relation queries the response was YES. [2024-06-20 16:05:31,964 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37926 conditions, 4426 events. 2851/4426 cut-off events. For 279341/279347 co-relation queries the response was YES. Maximal size of possible extension queue 233. Compared 24436 event pairs, 557 based on Foata normal form. 30/4455 useless extension candidates. Maximal degree in co-relation 37840. Up to 3965 conditions per place. [2024-06-20 16:05:31,981 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 246 selfloop transitions, 59 changer transitions 0/309 dead transitions. [2024-06-20 16:05:31,981 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 190 places, 309 transitions, 4335 flow [2024-06-20 16:05:31,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:05:31,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:05:31,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 174 transitions. [2024-06-20 16:05:31,982 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4715447154471545 [2024-06-20 16:05:31,982 INFO L175 Difference]: Start difference. First operand has 182 places, 265 transitions, 3201 flow. Second operand 9 states and 174 transitions. [2024-06-20 16:05:31,982 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 190 places, 309 transitions, 4335 flow [2024-06-20 16:05:32,270 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 187 places, 309 transitions, 4148 flow, removed 81 selfloop flow, removed 3 redundant places. [2024-06-20 16:05:32,273 INFO L231 Difference]: Finished difference. Result has 189 places, 273 transitions, 3454 flow [2024-06-20 16:05:32,274 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3026, PETRI_DIFFERENCE_MINUEND_PLACES=179, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=265, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=207, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3454, PETRI_PLACES=189, PETRI_TRANSITIONS=273} [2024-06-20 16:05:32,274 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 147 predicate places. [2024-06-20 16:05:32,274 INFO L495 AbstractCegarLoop]: Abstraction has has 189 places, 273 transitions, 3454 flow [2024-06-20 16:05:32,274 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:05:32,274 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:05:32,274 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:05:32,275 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-20 16:05:32,275 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:05:32,275 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:05:32,275 INFO L85 PathProgramCache]: Analyzing trace with hash -699565380, now seen corresponding path program 3 times [2024-06-20 16:05:32,275 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:05:32,275 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [426775077] [2024-06-20 16:05:32,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:05:32,276 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:05:32,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:05:33,220 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:05:33,221 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:05:33,221 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [426775077] [2024-06-20 16:05:33,221 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [426775077] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:05:33,221 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:05:33,221 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 16:05:33,221 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1362599776] [2024-06-20 16:05:33,221 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:05:33,221 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 16:05:33,221 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:05:33,222 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 16:05:33,222 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-20 16:05:33,335 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-20 16:05:33,336 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 189 places, 273 transitions, 3454 flow. Second operand has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:05:33,336 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:05:33,336 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-20 16:05:33,336 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:05:34,305 INFO L124 PetriNetUnfolderBase]: 2987/4658 cut-off events. [2024-06-20 16:05:34,305 INFO L125 PetriNetUnfolderBase]: For 296690/296692 co-relation queries the response was YES. [2024-06-20 16:05:34,330 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40490 conditions, 4658 events. 2987/4658 cut-off events. For 296690/296692 co-relation queries the response was YES. Maximal size of possible extension queue 245. Compared 26063 event pairs, 582 based on Foata normal form. 18/4675 useless extension candidates. Maximal degree in co-relation 40401. Up to 3734 conditions per place. [2024-06-20 16:05:34,349 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 220 selfloop transitions, 93 changer transitions 0/317 dead transitions. [2024-06-20 16:05:34,350 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 198 places, 317 transitions, 4522 flow [2024-06-20 16:05:34,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 16:05:34,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 16:05:34,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 191 transitions. [2024-06-20 16:05:34,352 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4658536585365854 [2024-06-20 16:05:34,352 INFO L175 Difference]: Start difference. First operand has 189 places, 273 transitions, 3454 flow. Second operand 10 states and 191 transitions. [2024-06-20 16:05:34,352 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 198 places, 317 transitions, 4522 flow [2024-06-20 16:05:34,783 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 193 places, 317 transitions, 4396 flow, removed 36 selfloop flow, removed 5 redundant places. [2024-06-20 16:05:34,787 INFO L231 Difference]: Finished difference. Result has 195 places, 277 transitions, 3715 flow [2024-06-20 16:05:34,787 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3330, PETRI_DIFFERENCE_MINUEND_PLACES=184, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=273, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=89, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=180, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3715, PETRI_PLACES=195, PETRI_TRANSITIONS=277} [2024-06-20 16:05:34,787 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 153 predicate places. [2024-06-20 16:05:34,788 INFO L495 AbstractCegarLoop]: Abstraction has has 195 places, 277 transitions, 3715 flow [2024-06-20 16:05:34,788 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:05:34,788 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:05:34,788 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:05:34,788 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-20 16:05:34,788 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)] === [2024-06-20 16:05:34,788 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:05:34,789 INFO L85 PathProgramCache]: Analyzing trace with hash 1398331529, now seen corresponding path program 1 times [2024-06-20 16:05:34,789 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:05:34,789 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1060004225] [2024-06-20 16:05:34,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:05:34,789 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:05:34,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:05:35,431 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:05:35,431 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:05:35,431 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1060004225] [2024-06-20 16:05:35,431 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1060004225] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:05:35,431 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:05:35,432 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 16:05:35,432 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1087935632] [2024-06-20 16:05:35,432 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:05:35,432 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 16:05:35,432 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:05:35,432 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 16:05:35,432 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-20 16:05:35,504 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-20 16:05:35,504 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 195 places, 277 transitions, 3715 flow. Second operand has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:05:35,504 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:05:35,505 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-20 16:05:35,505 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:05:36,480 INFO L124 PetriNetUnfolderBase]: 3013/4696 cut-off events. [2024-06-20 16:05:36,480 INFO L125 PetriNetUnfolderBase]: For 286663/286665 co-relation queries the response was YES. [2024-06-20 16:05:36,507 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41188 conditions, 4696 events. 3013/4696 cut-off events. For 286663/286665 co-relation queries the response was YES. Maximal size of possible extension queue 240. Compared 26263 event pairs, 610 based on Foata normal form. 4/4699 useless extension candidates. Maximal degree in co-relation 41096. Up to 4470 conditions per place. [2024-06-20 16:05:36,528 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 256 selfloop transitions, 49 changer transitions 0/309 dead transitions. [2024-06-20 16:05:36,528 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 202 places, 309 transitions, 4793 flow [2024-06-20 16:05:36,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:05:36,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:05:36,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 140 transitions. [2024-06-20 16:05:36,529 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4268292682926829 [2024-06-20 16:05:36,529 INFO L175 Difference]: Start difference. First operand has 195 places, 277 transitions, 3715 flow. Second operand 8 states and 140 transitions. [2024-06-20 16:05:36,529 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 202 places, 309 transitions, 4793 flow [2024-06-20 16:05:36,914 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 195 places, 309 transitions, 4546 flow, removed 39 selfloop flow, removed 7 redundant places. [2024-06-20 16:05:36,917 INFO L231 Difference]: Finished difference. Result has 197 places, 288 transitions, 3754 flow [2024-06-20 16:05:36,918 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3468, PETRI_DIFFERENCE_MINUEND_PLACES=188, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=277, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=234, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3754, PETRI_PLACES=197, PETRI_TRANSITIONS=288} [2024-06-20 16:05:36,918 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 155 predicate places. [2024-06-20 16:05:36,918 INFO L495 AbstractCegarLoop]: Abstraction has has 197 places, 288 transitions, 3754 flow [2024-06-20 16:05:36,918 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:05:36,918 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:05:36,919 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:05:36,919 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-20 16:05:36,919 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:05:36,919 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:05:36,919 INFO L85 PathProgramCache]: Analyzing trace with hash 1472629526, now seen corresponding path program 5 times [2024-06-20 16:05:36,919 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:05:36,919 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [536846133] [2024-06-20 16:05:36,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:05:36,920 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:05:36,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:05:37,895 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:05:37,896 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:05:37,896 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [536846133] [2024-06-20 16:05:37,896 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [536846133] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:05:37,896 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:05:37,896 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:05:37,896 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [130311667] [2024-06-20 16:05:37,896 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:05:37,896 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:05:37,896 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:05:37,897 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:05:37,897 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:05:38,019 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-20 16:05:38,020 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 197 places, 288 transitions, 3754 flow. Second operand has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:05:38,020 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:05:38,020 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-20 16:05:38,020 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:05:38,986 INFO L124 PetriNetUnfolderBase]: 3016/4701 cut-off events. [2024-06-20 16:05:38,986 INFO L125 PetriNetUnfolderBase]: For 290896/290900 co-relation queries the response was YES. [2024-06-20 16:05:39,010 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40873 conditions, 4701 events. 3016/4701 cut-off events. For 290896/290900 co-relation queries the response was YES. Maximal size of possible extension queue 245. Compared 26405 event pairs, 616 based on Foata normal form. 6/4705 useless extension candidates. Maximal degree in co-relation 40779. Up to 4093 conditions per place. [2024-06-20 16:05:39,028 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 233 selfloop transitions, 93 changer transitions 0/330 dead transitions. [2024-06-20 16:05:39,028 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 205 places, 330 transitions, 5200 flow [2024-06-20 16:05:39,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:05:39,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:05:39,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 173 transitions. [2024-06-20 16:05:39,029 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46883468834688347 [2024-06-20 16:05:39,029 INFO L175 Difference]: Start difference. First operand has 197 places, 288 transitions, 3754 flow. Second operand 9 states and 173 transitions. [2024-06-20 16:05:39,029 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 205 places, 330 transitions, 5200 flow [2024-06-20 16:05:39,506 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 202 places, 330 transitions, 5128 flow, removed 26 selfloop flow, removed 3 redundant places. [2024-06-20 16:05:39,510 INFO L231 Difference]: Finished difference. Result has 204 places, 296 transitions, 4178 flow [2024-06-20 16:05:39,511 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3682, PETRI_DIFFERENCE_MINUEND_PLACES=194, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=288, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=87, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=197, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4178, PETRI_PLACES=204, PETRI_TRANSITIONS=296} [2024-06-20 16:05:39,511 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 162 predicate places. [2024-06-20 16:05:39,511 INFO L495 AbstractCegarLoop]: Abstraction has has 204 places, 296 transitions, 4178 flow [2024-06-20 16:05:39,511 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:05:39,511 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:05:39,511 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:05:39,511 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-20 16:05:39,511 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:05:39,512 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:05:39,512 INFO L85 PathProgramCache]: Analyzing trace with hash 737201580, now seen corresponding path program 4 times [2024-06-20 16:05:39,512 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:05:39,512 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1133215242] [2024-06-20 16:05:39,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:05:39,512 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:05:39,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:05:40,513 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:05:40,513 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:05:40,514 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1133215242] [2024-06-20 16:05:40,514 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1133215242] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:05:40,514 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:05:40,514 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 16:05:40,514 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1784835412] [2024-06-20 16:05:40,514 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:05:40,514 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 16:05:40,514 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:05:40,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 16:05:40,514 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-06-20 16:05:40,600 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-20 16:05:40,600 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 204 places, 296 transitions, 4178 flow. Second operand has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:05:40,600 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:05:40,600 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-20 16:05:40,600 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:05:41,617 INFO L124 PetriNetUnfolderBase]: 3102/4843 cut-off events. [2024-06-20 16:05:41,617 INFO L125 PetriNetUnfolderBase]: For 339884/339888 co-relation queries the response was YES. [2024-06-20 16:05:41,648 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43295 conditions, 4843 events. 3102/4843 cut-off events. For 339884/339888 co-relation queries the response was YES. Maximal size of possible extension queue 255. Compared 27474 event pairs, 640 based on Foata normal form. 24/4865 useless extension candidates. Maximal degree in co-relation 43198. Up to 4078 conditions per place. [2024-06-20 16:05:41,669 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 179 selfloop transitions, 150 changer transitions 0/333 dead transitions. [2024-06-20 16:05:41,669 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 213 places, 333 transitions, 5200 flow [2024-06-20 16:05:41,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 16:05:41,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 16:05:41,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 190 transitions. [2024-06-20 16:05:41,670 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4634146341463415 [2024-06-20 16:05:41,670 INFO L175 Difference]: Start difference. First operand has 204 places, 296 transitions, 4178 flow. Second operand 10 states and 190 transitions. [2024-06-20 16:05:41,671 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 213 places, 333 transitions, 5200 flow [2024-06-20 16:05:42,144 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 208 places, 333 transitions, 4918 flow, removed 87 selfloop flow, removed 5 redundant places. [2024-06-20 16:05:42,148 INFO L231 Difference]: Finished difference. Result has 209 places, 298 transitions, 4332 flow [2024-06-20 16:05:42,148 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3896, PETRI_DIFFERENCE_MINUEND_PLACES=199, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=296, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=148, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=146, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4332, PETRI_PLACES=209, PETRI_TRANSITIONS=298} [2024-06-20 16:05:42,148 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 167 predicate places. [2024-06-20 16:05:42,148 INFO L495 AbstractCegarLoop]: Abstraction has has 209 places, 298 transitions, 4332 flow [2024-06-20 16:05:42,148 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:05:42,148 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:05:42,149 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:05:42,149 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-20 16:05:42,149 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:05:42,149 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:05:42,149 INFO L85 PathProgramCache]: Analyzing trace with hash -2095327874, now seen corresponding path program 5 times [2024-06-20 16:05:42,149 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:05:42,149 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1798098499] [2024-06-20 16:05:42,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:05:42,149 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:05:42,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:05:43,381 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:05:43,381 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:05:43,381 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1798098499] [2024-06-20 16:05:43,381 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1798098499] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:05:43,381 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:05:43,381 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 16:05:43,381 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [202174222] [2024-06-20 16:05:43,381 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:05:43,381 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 16:05:43,382 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:05:43,382 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 16:05:43,382 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-20 16:05:43,492 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-20 16:05:43,493 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 209 places, 298 transitions, 4332 flow. Second operand has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:05:43,493 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:05:43,493 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-20 16:05:43,493 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:05:44,624 INFO L124 PetriNetUnfolderBase]: 3188/5008 cut-off events. [2024-06-20 16:05:44,624 INFO L125 PetriNetUnfolderBase]: For 357724/357734 co-relation queries the response was YES. [2024-06-20 16:05:44,654 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45049 conditions, 5008 events. 3188/5008 cut-off events. For 357724/357734 co-relation queries the response was YES. Maximal size of possible extension queue 267. Compared 28798 event pairs, 639 based on Foata normal form. 34/5041 useless extension candidates. Maximal degree in co-relation 44952. Up to 4426 conditions per place. [2024-06-20 16:05:44,674 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 249 selfloop transitions, 91 changer transitions 0/344 dead transitions. [2024-06-20 16:05:44,675 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 219 places, 344 transitions, 5456 flow [2024-06-20 16:05:44,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 16:05:44,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 16:05:44,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 206 transitions. [2024-06-20 16:05:44,676 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4567627494456763 [2024-06-20 16:05:44,676 INFO L175 Difference]: Start difference. First operand has 209 places, 298 transitions, 4332 flow. Second operand 11 states and 206 transitions. [2024-06-20 16:05:44,676 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 219 places, 344 transitions, 5456 flow [2024-06-20 16:05:45,101 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 211 places, 344 transitions, 5082 flow, removed 39 selfloop flow, removed 8 redundant places. [2024-06-20 16:05:45,105 INFO L231 Difference]: Finished difference. Result has 213 places, 303 transitions, 4339 flow [2024-06-20 16:05:45,105 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3958, PETRI_DIFFERENCE_MINUEND_PLACES=201, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=298, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=86, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=207, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=4339, PETRI_PLACES=213, PETRI_TRANSITIONS=303} [2024-06-20 16:05:45,106 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 171 predicate places. [2024-06-20 16:05:45,106 INFO L495 AbstractCegarLoop]: Abstraction has has 213 places, 303 transitions, 4339 flow [2024-06-20 16:05:45,106 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:05:45,106 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:05:45,106 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:05:45,106 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-20 16:05:45,106 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:05:45,106 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:05:45,106 INFO L85 PathProgramCache]: Analyzing trace with hash 793488440, now seen corresponding path program 6 times [2024-06-20 16:05:45,106 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:05:45,107 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [554192104] [2024-06-20 16:05:45,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:05:45,107 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:05:45,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:05:46,284 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:05:46,284 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:05:46,284 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [554192104] [2024-06-20 16:05:46,284 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [554192104] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:05:46,284 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:05:46,284 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 16:05:46,284 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [253759721] [2024-06-20 16:05:46,284 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:05:46,285 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 16:05:46,285 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:05:46,285 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 16:05:46,285 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-20 16:05:46,367 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-20 16:05:46,367 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 213 places, 303 transitions, 4339 flow. Second operand has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:05:46,367 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:05:46,367 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-20 16:05:46,367 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:05:47,471 INFO L124 PetriNetUnfolderBase]: 3356/5304 cut-off events. [2024-06-20 16:05:47,471 INFO L125 PetriNetUnfolderBase]: For 397558/397568 co-relation queries the response was YES. [2024-06-20 16:05:47,507 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48680 conditions, 5304 events. 3356/5304 cut-off events. For 397558/397568 co-relation queries the response was YES. Maximal size of possible extension queue 284. Compared 30799 event pairs, 627 based on Foata normal form. 28/5331 useless extension candidates. Maximal degree in co-relation 48581. Up to 3155 conditions per place. [2024-06-20 16:05:47,530 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 201 selfloop transitions, 147 changer transitions 0/352 dead transitions. [2024-06-20 16:05:47,530 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 222 places, 352 transitions, 5803 flow [2024-06-20 16:05:47,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 16:05:47,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 16:05:47,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 195 transitions. [2024-06-20 16:05:47,531 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47560975609756095 [2024-06-20 16:05:47,531 INFO L175 Difference]: Start difference. First operand has 213 places, 303 transitions, 4339 flow. Second operand 10 states and 195 transitions. [2024-06-20 16:05:47,531 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 222 places, 352 transitions, 5803 flow [2024-06-20 16:05:48,073 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 214 places, 352 transitions, 5551 flow, removed 40 selfloop flow, removed 8 redundant places. [2024-06-20 16:05:48,077 INFO L231 Difference]: Finished difference. Result has 215 places, 307 transitions, 4656 flow [2024-06-20 16:05:48,077 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4087, PETRI_DIFFERENCE_MINUEND_PLACES=205, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=303, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=145, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=158, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4656, PETRI_PLACES=215, PETRI_TRANSITIONS=307} [2024-06-20 16:05:48,078 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 173 predicate places. [2024-06-20 16:05:48,078 INFO L495 AbstractCegarLoop]: Abstraction has has 215 places, 307 transitions, 4656 flow [2024-06-20 16:05:48,078 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:05:48,078 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:05:48,078 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:05:48,078 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-20 16:05:48,078 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:05:48,079 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:05:48,079 INFO L85 PathProgramCache]: Analyzing trace with hash 2005707452, now seen corresponding path program 7 times [2024-06-20 16:05:48,079 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:05:48,079 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [936892375] [2024-06-20 16:05:48,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:05:48,079 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:05:48,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:05:49,180 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:05:49,180 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:05:49,180 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [936892375] [2024-06-20 16:05:49,181 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [936892375] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:05:49,181 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:05:49,181 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 16:05:49,181 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [613486425] [2024-06-20 16:05:49,181 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:05:49,181 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 16:05:49,181 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:05:49,181 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 16:05:49,181 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-06-20 16:05:49,291 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-20 16:05:49,291 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 215 places, 307 transitions, 4656 flow. Second operand has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:05:49,291 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:05:49,291 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-20 16:05:49,292 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:05:50,525 INFO L124 PetriNetUnfolderBase]: 3586/5704 cut-off events. [2024-06-20 16:05:50,525 INFO L125 PetriNetUnfolderBase]: For 448647/448657 co-relation queries the response was YES. [2024-06-20 16:05:50,559 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53854 conditions, 5704 events. 3586/5704 cut-off events. For 448647/448657 co-relation queries the response was YES. Maximal size of possible extension queue 308. Compared 34214 event pairs, 753 based on Foata normal form. 28/5731 useless extension candidates. Maximal degree in co-relation 53754. Up to 4789 conditions per place. [2024-06-20 16:05:50,582 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 271 selfloop transitions, 81 changer transitions 0/356 dead transitions. [2024-06-20 16:05:50,582 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 224 places, 356 transitions, 6280 flow [2024-06-20 16:05:50,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 16:05:50,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 16:05:50,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 194 transitions. [2024-06-20 16:05:50,583 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47317073170731705 [2024-06-20 16:05:50,583 INFO L175 Difference]: Start difference. First operand has 215 places, 307 transitions, 4656 flow. Second operand 10 states and 194 transitions. [2024-06-20 16:05:50,583 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 224 places, 356 transitions, 6280 flow [2024-06-20 16:05:51,191 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 218 places, 356 transitions, 6016 flow, removed 54 selfloop flow, removed 6 redundant places. [2024-06-20 16:05:51,195 INFO L231 Difference]: Finished difference. Result has 220 places, 313 transitions, 4911 flow [2024-06-20 16:05:51,196 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4404, PETRI_DIFFERENCE_MINUEND_PLACES=209, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=307, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=77, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=228, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4911, PETRI_PLACES=220, PETRI_TRANSITIONS=313} [2024-06-20 16:05:51,196 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 178 predicate places. [2024-06-20 16:05:51,196 INFO L495 AbstractCegarLoop]: Abstraction has has 220 places, 313 transitions, 4911 flow [2024-06-20 16:05:51,197 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:05:51,197 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:05:51,197 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:05:51,197 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-20 16:05:51,197 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:05:51,197 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:05:51,197 INFO L85 PathProgramCache]: Analyzing trace with hash 480708510, now seen corresponding path program 8 times [2024-06-20 16:05:51,197 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:05:51,197 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [941160724] [2024-06-20 16:05:51,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:05:51,197 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:05:51,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:05:52,315 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:05:52,315 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:05:52,315 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [941160724] [2024-06-20 16:05:52,315 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [941160724] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:05:52,315 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:05:52,315 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 16:05:52,315 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2061103222] [2024-06-20 16:05:52,315 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:05:52,315 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 16:05:52,316 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:05:52,316 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 16:05:52,316 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-06-20 16:05:52,478 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-20 16:05:52,478 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 220 places, 313 transitions, 4911 flow. Second operand has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:05:52,478 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:05:52,478 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-20 16:05:52,478 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:05:53,715 INFO L124 PetriNetUnfolderBase]: 3733/5963 cut-off events. [2024-06-20 16:05:53,715 INFO L125 PetriNetUnfolderBase]: For 462962/462972 co-relation queries the response was YES. [2024-06-20 16:05:53,756 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56040 conditions, 5963 events. 3733/5963 cut-off events. For 462962/462972 co-relation queries the response was YES. Maximal size of possible extension queue 324. Compared 36356 event pairs, 804 based on Foata normal form. 28/5990 useless extension candidates. Maximal degree in co-relation 55937. Up to 5116 conditions per place. [2024-06-20 16:05:53,781 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 263 selfloop transitions, 91 changer transitions 0/358 dead transitions. [2024-06-20 16:05:53,782 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 229 places, 358 transitions, 6119 flow [2024-06-20 16:05:53,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 16:05:53,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 16:05:53,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 191 transitions. [2024-06-20 16:05:53,783 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4658536585365854 [2024-06-20 16:05:53,783 INFO L175 Difference]: Start difference. First operand has 220 places, 313 transitions, 4911 flow. Second operand 10 states and 191 transitions. [2024-06-20 16:05:53,783 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 229 places, 358 transitions, 6119 flow [2024-06-20 16:05:54,626 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 223 places, 358 transitions, 5931 flow, removed 46 selfloop flow, removed 6 redundant places. [2024-06-20 16:05:54,630 INFO L231 Difference]: Finished difference. Result has 225 places, 318 transitions, 5132 flow [2024-06-20 16:05:54,630 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4723, PETRI_DIFFERENCE_MINUEND_PLACES=214, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=313, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=86, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=222, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5132, PETRI_PLACES=225, PETRI_TRANSITIONS=318} [2024-06-20 16:05:54,631 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 183 predicate places. [2024-06-20 16:05:54,631 INFO L495 AbstractCegarLoop]: Abstraction has has 225 places, 318 transitions, 5132 flow [2024-06-20 16:05:54,631 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:05:54,631 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:05:54,631 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:05:54,631 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-20 16:05:54,631 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:05:54,632 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:05:54,632 INFO L85 PathProgramCache]: Analyzing trace with hash 209856546, now seen corresponding path program 9 times [2024-06-20 16:05:54,632 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:05:54,632 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2114562019] [2024-06-20 16:05:54,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:05:54,632 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:05:54,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:05:55,557 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:05:55,558 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:05:55,558 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2114562019] [2024-06-20 16:05:55,558 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2114562019] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:05:55,558 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:05:55,558 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 16:05:55,558 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1024535673] [2024-06-20 16:05:55,558 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:05:55,558 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 16:05:55,559 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:05:55,559 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 16:05:55,559 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-06-20 16:05:55,660 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-20 16:05:55,660 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 225 places, 318 transitions, 5132 flow. Second operand has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:05:55,660 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:05:55,661 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-20 16:05:55,661 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:05:57,021 INFO L124 PetriNetUnfolderBase]: 3700/5904 cut-off events. [2024-06-20 16:05:57,022 INFO L125 PetriNetUnfolderBase]: For 445354/445358 co-relation queries the response was YES. [2024-06-20 16:05:57,063 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54684 conditions, 5904 events. 3700/5904 cut-off events. For 445354/445358 co-relation queries the response was YES. Maximal size of possible extension queue 322. Compared 35913 event pairs, 799 based on Foata normal form. 18/5920 useless extension candidates. Maximal degree in co-relation 54578. Up to 4959 conditions per place. [2024-06-20 16:05:57,090 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 200 selfloop transitions, 154 changer transitions 0/358 dead transitions. [2024-06-20 16:05:57,090 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 234 places, 358 transitions, 6186 flow [2024-06-20 16:05:57,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 16:05:57,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 16:05:57,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 193 transitions. [2024-06-20 16:05:57,091 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47073170731707314 [2024-06-20 16:05:57,091 INFO L175 Difference]: Start difference. First operand has 225 places, 318 transitions, 5132 flow. Second operand 10 states and 193 transitions. [2024-06-20 16:05:57,091 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 234 places, 358 transitions, 6186 flow [2024-06-20 16:05:57,860 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 227 places, 358 transitions, 5925 flow, removed 46 selfloop flow, removed 7 redundant places. [2024-06-20 16:05:57,865 INFO L231 Difference]: Finished difference. Result has 229 places, 320 transitions, 5260 flow [2024-06-20 16:05:57,865 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4871, PETRI_DIFFERENCE_MINUEND_PLACES=218, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=318, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=152, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=164, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5260, PETRI_PLACES=229, PETRI_TRANSITIONS=320} [2024-06-20 16:05:57,865 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 187 predicate places. [2024-06-20 16:05:57,865 INFO L495 AbstractCegarLoop]: Abstraction has has 229 places, 320 transitions, 5260 flow [2024-06-20 16:05:57,865 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:05:57,866 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:05:57,866 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:05:57,866 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-20 16:05:57,866 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:05:57,866 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:05:57,866 INFO L85 PathProgramCache]: Analyzing trace with hash 2005700012, now seen corresponding path program 10 times [2024-06-20 16:05:57,866 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:05:57,866 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1632655098] [2024-06-20 16:05:57,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:05:57,866 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:05:57,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:05:59,176 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:05:59,177 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:05:59,177 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1632655098] [2024-06-20 16:05:59,177 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1632655098] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:05:59,177 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:05:59,177 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 16:05:59,177 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1038266657] [2024-06-20 16:05:59,177 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:05:59,177 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 16:05:59,177 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:05:59,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 16:05:59,178 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-20 16:05:59,277 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-20 16:05:59,278 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 229 places, 320 transitions, 5260 flow. Second operand has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:05:59,278 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:05:59,278 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-20 16:05:59,278 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:06:00,710 INFO L124 PetriNetUnfolderBase]: 3710/5933 cut-off events. [2024-06-20 16:06:00,710 INFO L125 PetriNetUnfolderBase]: For 437252/437262 co-relation queries the response was YES. [2024-06-20 16:06:00,752 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53516 conditions, 5933 events. 3710/5933 cut-off events. For 437252/437262 co-relation queries the response was YES. Maximal size of possible extension queue 323. Compared 36212 event pairs, 776 based on Foata normal form. 34/5966 useless extension candidates. Maximal degree in co-relation 53408. Up to 5268 conditions per place. [2024-06-20 16:06:00,780 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 280 selfloop transitions, 85 changer transitions 0/369 dead transitions. [2024-06-20 16:06:00,780 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 239 places, 369 transitions, 6505 flow [2024-06-20 16:06:00,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 16:06:00,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 16:06:00,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 208 transitions. [2024-06-20 16:06:00,781 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4611973392461197 [2024-06-20 16:06:00,781 INFO L175 Difference]: Start difference. First operand has 229 places, 320 transitions, 5260 flow. Second operand 11 states and 208 transitions. [2024-06-20 16:06:00,781 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 239 places, 369 transitions, 6505 flow [2024-06-20 16:06:01,731 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 230 places, 369 transitions, 5912 flow, removed 84 selfloop flow, removed 9 redundant places. [2024-06-20 16:06:01,735 INFO L231 Difference]: Finished difference. Result has 231 places, 327 transitions, 4980 flow [2024-06-20 16:06:01,735 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4680, PETRI_DIFFERENCE_MINUEND_PLACES=220, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=320, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=239, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=4980, PETRI_PLACES=231, PETRI_TRANSITIONS=327} [2024-06-20 16:06:01,736 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 189 predicate places. [2024-06-20 16:06:01,736 INFO L495 AbstractCegarLoop]: Abstraction has has 231 places, 327 transitions, 4980 flow [2024-06-20 16:06:01,736 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:06:01,736 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:06:01,736 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:06:01,736 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-06-20 16:06:01,736 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)] === [2024-06-20 16:06:01,737 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:06:01,737 INFO L85 PathProgramCache]: Analyzing trace with hash 559289605, now seen corresponding path program 2 times [2024-06-20 16:06:01,737 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:06:01,737 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1689656989] [2024-06-20 16:06:01,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:06:01,737 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:06:01,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:06:02,452 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:06:02,452 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:06:02,452 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1689656989] [2024-06-20 16:06:02,452 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1689656989] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:06:02,453 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:06:02,453 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:06:02,453 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [404421759] [2024-06-20 16:06:02,453 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:06:02,453 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:06:02,453 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:06:02,453 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:06:02,453 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:06:02,536 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-20 16:06:02,536 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 231 places, 327 transitions, 4980 flow. Second operand has 9 states, 9 states have (on average 10.555555555555555) internal successors, (95), 9 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:06:02,536 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:06:02,536 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-20 16:06:02,537 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:06:03,686 INFO L124 PetriNetUnfolderBase]: 3720/5940 cut-off events. [2024-06-20 16:06:03,686 INFO L125 PetriNetUnfolderBase]: For 387068/387070 co-relation queries the response was YES. [2024-06-20 16:06:03,727 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51989 conditions, 5940 events. 3720/5940 cut-off events. For 387068/387070 co-relation queries the response was YES. Maximal size of possible extension queue 316. Compared 36084 event pairs, 786 based on Foata normal form. 4/5943 useless extension candidates. Maximal degree in co-relation 51881. Up to 5643 conditions per place. [2024-06-20 16:06:03,751 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 281 selfloop transitions, 58 changer transitions 0/343 dead transitions. [2024-06-20 16:06:03,751 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 238 places, 343 transitions, 5888 flow [2024-06-20 16:06:03,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:06:03,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:06:03,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 133 transitions. [2024-06-20 16:06:03,752 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4054878048780488 [2024-06-20 16:06:03,752 INFO L175 Difference]: Start difference. First operand has 231 places, 327 transitions, 4980 flow. Second operand 8 states and 133 transitions. [2024-06-20 16:06:03,752 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 238 places, 343 transitions, 5888 flow [2024-06-20 16:06:04,475 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 229 places, 343 transitions, 5709 flow, removed 6 selfloop flow, removed 9 redundant places. [2024-06-20 16:06:04,479 INFO L231 Difference]: Finished difference. Result has 230 places, 330 transitions, 4973 flow [2024-06-20 16:06:04,479 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4803, PETRI_DIFFERENCE_MINUEND_PLACES=222, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=327, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=272, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4973, PETRI_PLACES=230, PETRI_TRANSITIONS=330} [2024-06-20 16:06:04,479 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 188 predicate places. [2024-06-20 16:06:04,479 INFO L495 AbstractCegarLoop]: Abstraction has has 230 places, 330 transitions, 4973 flow [2024-06-20 16:06:04,480 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.555555555555555) internal successors, (95), 9 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:06:04,480 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:06:04,480 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:06:04,480 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-06-20 16:06:04,480 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)] === [2024-06-20 16:06:04,480 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:06:04,480 INFO L85 PathProgramCache]: Analyzing trace with hash 1752594569, now seen corresponding path program 3 times [2024-06-20 16:06:04,480 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:06:04,480 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1769224088] [2024-06-20 16:06:04,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:06:04,480 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:06:04,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:06:05,109 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:06:05,110 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:06:05,110 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1769224088] [2024-06-20 16:06:05,110 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1769224088] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:06:05,110 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:06:05,110 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 16:06:05,110 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1732840205] [2024-06-20 16:06:05,110 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:06:05,110 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 16:06:05,110 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:06:05,111 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 16:06:05,111 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-20 16:06:05,178 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-20 16:06:05,179 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 230 places, 330 transitions, 4973 flow. Second operand has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:06:05,179 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:06:05,179 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-20 16:06:05,179 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:06:06,391 INFO L124 PetriNetUnfolderBase]: 3714/5934 cut-off events. [2024-06-20 16:06:06,391 INFO L125 PetriNetUnfolderBase]: For 394129/394131 co-relation queries the response was YES. [2024-06-20 16:06:06,435 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51722 conditions, 5934 events. 3714/5934 cut-off events. For 394129/394131 co-relation queries the response was YES. Maximal size of possible extension queue 316. Compared 36069 event pairs, 786 based on Foata normal form. 4/5937 useless extension candidates. Maximal degree in co-relation 51614. Up to 5638 conditions per place. [2024-06-20 16:06:06,461 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 289 selfloop transitions, 52 changer transitions 0/345 dead transitions. [2024-06-20 16:06:06,462 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 237 places, 345 transitions, 5866 flow [2024-06-20 16:06:06,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:06:06,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:06:06,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 134 transitions. [2024-06-20 16:06:06,463 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40853658536585363 [2024-06-20 16:06:06,463 INFO L175 Difference]: Start difference. First operand has 230 places, 330 transitions, 4973 flow. Second operand 8 states and 134 transitions. [2024-06-20 16:06:06,463 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 237 places, 345 transitions, 5866 flow [2024-06-20 16:06:07,239 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 230 places, 345 transitions, 5674 flow, removed 35 selfloop flow, removed 7 redundant places. [2024-06-20 16:06:07,244 INFO L231 Difference]: Finished difference. Result has 231 places, 330 transitions, 4894 flow [2024-06-20 16:06:07,245 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4783, PETRI_DIFFERENCE_MINUEND_PLACES=223, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=330, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=278, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4894, PETRI_PLACES=231, PETRI_TRANSITIONS=330} [2024-06-20 16:06:07,245 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 189 predicate places. [2024-06-20 16:06:07,245 INFO L495 AbstractCegarLoop]: Abstraction has has 231 places, 330 transitions, 4894 flow [2024-06-20 16:06:07,245 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:06:07,246 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:06:07,246 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:06:07,246 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-06-20 16:06:07,246 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)] === [2024-06-20 16:06:07,246 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:06:07,246 INFO L85 PathProgramCache]: Analyzing trace with hash -134080345, now seen corresponding path program 4 times [2024-06-20 16:06:07,246 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:06:07,246 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1613018741] [2024-06-20 16:06:07,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:06:07,247 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:06:07,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:06:07,810 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:06:07,810 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:06:07,810 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1613018741] [2024-06-20 16:06:07,810 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1613018741] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:06:07,810 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:06:07,810 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 16:06:07,811 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [280762000] [2024-06-20 16:06:07,811 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:06:07,811 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 16:06:07,811 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:06:07,811 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 16:06:07,811 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2024-06-20 16:06:07,881 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-20 16:06:07,881 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 231 places, 330 transitions, 4894 flow. Second operand has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:06:07,881 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:06:07,881 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-20 16:06:07,881 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:06:09,008 INFO L124 PetriNetUnfolderBase]: 3718/5937 cut-off events. [2024-06-20 16:06:09,008 INFO L125 PetriNetUnfolderBase]: For 400896/400898 co-relation queries the response was YES. [2024-06-20 16:06:09,050 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51671 conditions, 5937 events. 3718/5937 cut-off events. For 400896/400898 co-relation queries the response was YES. Maximal size of possible extension queue 323. Compared 36158 event pairs, 775 based on Foata normal form. 4/5940 useless extension candidates. Maximal degree in co-relation 51564. Up to 5643 conditions per place. [2024-06-20 16:06:09,075 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 295 selfloop transitions, 57 changer transitions 0/356 dead transitions. [2024-06-20 16:06:09,075 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 238 places, 356 transitions, 5743 flow [2024-06-20 16:06:09,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:06:09,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:06:09,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 144 transitions. [2024-06-20 16:06:09,076 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43902439024390244 [2024-06-20 16:06:09,076 INFO L175 Difference]: Start difference. First operand has 231 places, 330 transitions, 4894 flow. Second operand 8 states and 144 transitions. [2024-06-20 16:06:09,076 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 238 places, 356 transitions, 5743 flow [2024-06-20 16:06:09,885 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 233 places, 356 transitions, 5637 flow, removed 13 selfloop flow, removed 5 redundant places. [2024-06-20 16:06:09,889 INFO L231 Difference]: Finished difference. Result has 234 places, 334 transitions, 4950 flow [2024-06-20 16:06:09,890 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4792, PETRI_DIFFERENCE_MINUEND_PLACES=226, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=330, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=277, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4950, PETRI_PLACES=234, PETRI_TRANSITIONS=334} [2024-06-20 16:06:09,890 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 192 predicate places. [2024-06-20 16:06:09,890 INFO L495 AbstractCegarLoop]: Abstraction has has 234 places, 334 transitions, 4950 flow [2024-06-20 16:06:09,890 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:06:09,890 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:06:09,890 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:06:09,890 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-06-20 16:06:09,890 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)] === [2024-06-20 16:06:09,891 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:06:09,891 INFO L85 PathProgramCache]: Analyzing trace with hash 1575647561, now seen corresponding path program 1 times [2024-06-20 16:06:09,891 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:06:09,891 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [651148711] [2024-06-20 16:06:09,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:06:09,891 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:06:09,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:06:10,551 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:06:10,551 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:06:10,551 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [651148711] [2024-06-20 16:06:10,551 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [651148711] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:06:10,551 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:06:10,551 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 16:06:10,551 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1403599859] [2024-06-20 16:06:10,551 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:06:10,551 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 16:06:10,552 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:06:10,552 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 16:06:10,552 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-20 16:06:10,613 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 16:06:10,613 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 234 places, 334 transitions, 4950 flow. Second operand has 8 states, 8 states have (on average 11.75) internal successors, (94), 8 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:06:10,613 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:06:10,613 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 16:06:10,613 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:06:11,602 INFO L124 PetriNetUnfolderBase]: 3601/5829 cut-off events. [2024-06-20 16:06:11,602 INFO L125 PetriNetUnfolderBase]: For 370358/370360 co-relation queries the response was YES. [2024-06-20 16:06:11,642 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49849 conditions, 5829 events. 3601/5829 cut-off events. For 370358/370360 co-relation queries the response was YES. Maximal size of possible extension queue 324. Compared 36209 event pairs, 724 based on Foata normal form. 4/5825 useless extension candidates. Maximal degree in co-relation 49741. Up to 5493 conditions per place. [2024-06-20 16:06:11,666 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 319 selfloop transitions, 30 changer transitions 0/360 dead transitions. [2024-06-20 16:06:11,666 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 241 places, 360 transitions, 5948 flow [2024-06-20 16:06:11,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:06:11,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:06:11,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 143 transitions. [2024-06-20 16:06:11,667 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43597560975609756 [2024-06-20 16:06:11,667 INFO L175 Difference]: Start difference. First operand has 234 places, 334 transitions, 4950 flow. Second operand 8 states and 143 transitions. [2024-06-20 16:06:11,667 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 241 places, 360 transitions, 5948 flow [2024-06-20 16:06:12,352 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 237 places, 360 transitions, 5876 flow, removed 1 selfloop flow, removed 4 redundant places. [2024-06-20 16:06:12,356 INFO L231 Difference]: Finished difference. Result has 239 places, 344 transitions, 5085 flow [2024-06-20 16:06:12,357 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4878, PETRI_DIFFERENCE_MINUEND_PLACES=230, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=334, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=307, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5085, PETRI_PLACES=239, PETRI_TRANSITIONS=344} [2024-06-20 16:06:12,357 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 197 predicate places. [2024-06-20 16:06:12,357 INFO L495 AbstractCegarLoop]: Abstraction has has 239 places, 344 transitions, 5085 flow [2024-06-20 16:06:12,357 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.75) internal successors, (94), 8 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:06:12,357 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:06:12,357 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:06:12,357 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-06-20 16:06:12,357 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)] === [2024-06-20 16:06:12,357 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:06:12,358 INFO L85 PathProgramCache]: Analyzing trace with hash 559295557, now seen corresponding path program 2 times [2024-06-20 16:06:12,358 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:06:12,358 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1292163465] [2024-06-20 16:06:12,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:06:12,358 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:06:12,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:06:12,931 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:06:12,932 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:06:12,932 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1292163465] [2024-06-20 16:06:12,932 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1292163465] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:06:12,932 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:06:12,932 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 16:06:12,932 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1160182935] [2024-06-20 16:06:12,932 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:06:12,932 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 16:06:12,932 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:06:12,933 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 16:06:12,933 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-20 16:06:13,005 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 16:06:13,006 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 239 places, 344 transitions, 5085 flow. Second operand has 8 states, 8 states have (on average 11.75) internal successors, (94), 8 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:06:13,006 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:06:13,006 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 16:06:13,006 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:06:14,048 INFO L124 PetriNetUnfolderBase]: 3599/5830 cut-off events. [2024-06-20 16:06:14,048 INFO L125 PetriNetUnfolderBase]: For 378616/378618 co-relation queries the response was YES. [2024-06-20 16:06:14,088 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50391 conditions, 5830 events. 3599/5830 cut-off events. For 378616/378618 co-relation queries the response was YES. Maximal size of possible extension queue 324. Compared 36177 event pairs, 725 based on Foata normal form. 2/5828 useless extension candidates. Maximal degree in co-relation 50280. Up to 5556 conditions per place. [2024-06-20 16:06:14,112 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 329 selfloop transitions, 17 changer transitions 0/357 dead transitions. [2024-06-20 16:06:14,112 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 245 places, 357 transitions, 5859 flow [2024-06-20 16:06:14,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 16:06:14,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 16:06:14,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 120 transitions. [2024-06-20 16:06:14,113 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4181184668989547 [2024-06-20 16:06:14,113 INFO L175 Difference]: Start difference. First operand has 239 places, 344 transitions, 5085 flow. Second operand 7 states and 120 transitions. [2024-06-20 16:06:14,113 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 245 places, 357 transitions, 5859 flow [2024-06-20 16:06:14,878 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 242 places, 357 transitions, 5782 flow, removed 33 selfloop flow, removed 3 redundant places. [2024-06-20 16:06:14,883 INFO L231 Difference]: Finished difference. Result has 243 places, 347 transitions, 5109 flow [2024-06-20 16:06:14,883 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5008, PETRI_DIFFERENCE_MINUEND_PLACES=236, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=344, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=327, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5109, PETRI_PLACES=243, PETRI_TRANSITIONS=347} [2024-06-20 16:06:14,883 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 201 predicate places. [2024-06-20 16:06:14,883 INFO L495 AbstractCegarLoop]: Abstraction has has 243 places, 347 transitions, 5109 flow [2024-06-20 16:06:14,883 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.75) internal successors, (94), 8 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:06:14,883 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:06:14,883 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:06:14,883 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2024-06-20 16:06:14,884 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)] === [2024-06-20 16:06:14,884 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:06:14,884 INFO L85 PathProgramCache]: Analyzing trace with hash 1752779081, now seen corresponding path program 3 times [2024-06-20 16:06:14,884 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:06:14,884 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2060070414] [2024-06-20 16:06:14,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:06:14,884 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:06:14,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:06:15,506 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:06:15,506 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:06:15,506 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2060070414] [2024-06-20 16:06:15,506 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2060070414] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:06:15,506 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:06:15,506 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 16:06:15,506 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [45347341] [2024-06-20 16:06:15,506 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:06:15,507 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 16:06:15,507 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:06:15,507 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 16:06:15,507 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-20 16:06:15,576 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 16:06:15,577 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 243 places, 347 transitions, 5109 flow. Second operand has 8 states, 8 states have (on average 11.75) internal successors, (94), 8 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:06:15,577 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:06:15,577 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 16:06:15,577 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:06:16,646 INFO L124 PetriNetUnfolderBase]: 3605/5837 cut-off events. [2024-06-20 16:06:16,646 INFO L125 PetriNetUnfolderBase]: For 385450/385452 co-relation queries the response was YES. [2024-06-20 16:06:16,688 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50498 conditions, 5837 events. 3605/5837 cut-off events. For 385450/385452 co-relation queries the response was YES. Maximal size of possible extension queue 323. Compared 36273 event pairs, 724 based on Foata normal form. 2/5831 useless extension candidates. Maximal degree in co-relation 50385. Up to 5558 conditions per place. [2024-06-20 16:06:16,712 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 327 selfloop transitions, 23 changer transitions 0/361 dead transitions. [2024-06-20 16:06:16,712 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 250 places, 361 transitions, 5901 flow [2024-06-20 16:06:16,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:06:16,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:06:16,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 134 transitions. [2024-06-20 16:06:16,713 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40853658536585363 [2024-06-20 16:06:16,713 INFO L175 Difference]: Start difference. First operand has 243 places, 347 transitions, 5109 flow. Second operand 8 states and 134 transitions. [2024-06-20 16:06:16,713 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 250 places, 361 transitions, 5901 flow [2024-06-20 16:06:17,441 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 245 places, 361 transitions, 5824 flow, removed 22 selfloop flow, removed 5 redundant places. [2024-06-20 16:06:17,445 INFO L231 Difference]: Finished difference. Result has 246 places, 350 transitions, 5150 flow [2024-06-20 16:06:17,445 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5032, PETRI_DIFFERENCE_MINUEND_PLACES=238, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=347, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=324, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5150, PETRI_PLACES=246, PETRI_TRANSITIONS=350} [2024-06-20 16:06:17,446 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 204 predicate places. [2024-06-20 16:06:17,446 INFO L495 AbstractCegarLoop]: Abstraction has has 246 places, 350 transitions, 5150 flow [2024-06-20 16:06:17,446 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.75) internal successors, (94), 8 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:06:17,446 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:06:17,446 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:06:17,446 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2024-06-20 16:06:17,446 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:06:17,447 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:06:17,447 INFO L85 PathProgramCache]: Analyzing trace with hash 489740771, now seen corresponding path program 1 times [2024-06-20 16:06:17,447 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:06:17,447 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1906464551] [2024-06-20 16:06:17,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:06:17,447 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:06:17,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:06:18,633 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:06:18,634 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:06:18,634 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1906464551] [2024-06-20 16:06:18,634 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1906464551] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:06:18,634 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:06:18,634 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 16:06:18,634 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2083968873] [2024-06-20 16:06:18,634 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:06:18,634 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 16:06:18,634 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:06:18,635 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 16:06:18,635 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-20 16:06:18,733 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-20 16:06:18,733 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 246 places, 350 transitions, 5150 flow. Second operand has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:06:18,734 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:06:18,734 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-20 16:06:18,734 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:06:20,004 INFO L124 PetriNetUnfolderBase]: 3838/6132 cut-off events. [2024-06-20 16:06:20,005 INFO L125 PetriNetUnfolderBase]: For 491127/491133 co-relation queries the response was YES. [2024-06-20 16:06:20,053 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54635 conditions, 6132 events. 3838/6132 cut-off events. For 491127/491133 co-relation queries the response was YES. Maximal size of possible extension queue 331. Compared 37575 event pairs, 723 based on Foata normal form. 24/6155 useless extension candidates. Maximal degree in co-relation 54521. Up to 5699 conditions per place. [2024-06-20 16:06:20,080 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 334 selfloop transitions, 55 changer transitions 0/393 dead transitions. [2024-06-20 16:06:20,080 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 255 places, 393 transitions, 6335 flow [2024-06-20 16:06:20,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 16:06:20,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 16:06:20,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 187 transitions. [2024-06-20 16:06:20,081 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4560975609756098 [2024-06-20 16:06:20,081 INFO L175 Difference]: Start difference. First operand has 246 places, 350 transitions, 5150 flow. Second operand 10 states and 187 transitions. [2024-06-20 16:06:20,081 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 255 places, 393 transitions, 6335 flow [2024-06-20 16:06:20,839 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 249 places, 393 transitions, 6243 flow, removed 25 selfloop flow, removed 6 redundant places. [2024-06-20 16:06:20,844 INFO L231 Difference]: Finished difference. Result has 250 places, 352 transitions, 5315 flow [2024-06-20 16:06:20,844 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5058, PETRI_DIFFERENCE_MINUEND_PLACES=240, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=350, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=295, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5315, PETRI_PLACES=250, PETRI_TRANSITIONS=352} [2024-06-20 16:06:20,845 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 208 predicate places. [2024-06-20 16:06:20,845 INFO L495 AbstractCegarLoop]: Abstraction has has 250 places, 352 transitions, 5315 flow [2024-06-20 16:06:20,845 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:06:20,845 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:06:20,845 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:06:20,845 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2024-06-20 16:06:20,846 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:06:20,846 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:06:20,846 INFO L85 PathProgramCache]: Analyzing trace with hash 947614961, now seen corresponding path program 2 times [2024-06-20 16:06:20,846 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:06:20,847 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1575772777] [2024-06-20 16:06:20,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:06:20,847 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:06:20,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:06:22,180 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:06:22,180 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:06:22,180 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1575772777] [2024-06-20 16:06:22,180 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1575772777] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:06:22,180 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:06:22,181 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 16:06:22,181 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [697002335] [2024-06-20 16:06:22,181 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:06:22,181 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 16:06:22,181 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:06:22,181 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 16:06:22,182 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-20 16:06:22,328 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-20 16:06:22,328 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 250 places, 352 transitions, 5315 flow. Second operand has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:06:22,328 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:06:22,328 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-20 16:06:22,328 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:06:23,688 INFO L124 PetriNetUnfolderBase]: 3906/6248 cut-off events. [2024-06-20 16:06:23,688 INFO L125 PetriNetUnfolderBase]: For 510720/510726 co-relation queries the response was YES. [2024-06-20 16:06:23,735 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56336 conditions, 6248 events. 3906/6248 cut-off events. For 510720/510726 co-relation queries the response was YES. Maximal size of possible extension queue 337. Compared 38482 event pairs, 769 based on Foata normal form. 24/6271 useless extension candidates. Maximal degree in co-relation 56221. Up to 5731 conditions per place. [2024-06-20 16:06:23,761 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 335 selfloop transitions, 58 changer transitions 0/397 dead transitions. [2024-06-20 16:06:23,761 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 259 places, 397 transitions, 6640 flow [2024-06-20 16:06:23,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 16:06:23,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 16:06:23,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 189 transitions. [2024-06-20 16:06:23,763 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4609756097560976 [2024-06-20 16:06:23,763 INFO L175 Difference]: Start difference. First operand has 250 places, 352 transitions, 5315 flow. Second operand 10 states and 189 transitions. [2024-06-20 16:06:23,763 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 259 places, 397 transitions, 6640 flow [2024-06-20 16:06:24,902 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 251 places, 397 transitions, 6433 flow, removed 50 selfloop flow, removed 8 redundant places. [2024-06-20 16:06:24,907 INFO L231 Difference]: Finished difference. Result has 252 places, 354 transitions, 5375 flow [2024-06-20 16:06:24,907 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5108, PETRI_DIFFERENCE_MINUEND_PLACES=242, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=352, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=294, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5375, PETRI_PLACES=252, PETRI_TRANSITIONS=354} [2024-06-20 16:06:24,907 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 210 predicate places. [2024-06-20 16:06:24,907 INFO L495 AbstractCegarLoop]: Abstraction has has 252 places, 354 transitions, 5375 flow [2024-06-20 16:06:24,907 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:06:24,907 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:06:24,907 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:06:24,907 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2024-06-20 16:06:24,908 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:06:24,908 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:06:24,908 INFO L85 PathProgramCache]: Analyzing trace with hash 2034585537, now seen corresponding path program 3 times [2024-06-20 16:06:24,908 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:06:24,908 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1917604692] [2024-06-20 16:06:24,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:06:24,908 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:06:24,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:06:26,105 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:06:26,105 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:06:26,106 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1917604692] [2024-06-20 16:06:26,106 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1917604692] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:06:26,106 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:06:26,106 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 16:06:26,106 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [763397896] [2024-06-20 16:06:26,106 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:06:26,106 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 16:06:26,106 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:06:26,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 16:06:26,106 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-20 16:06:26,236 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-20 16:06:26,237 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 252 places, 354 transitions, 5375 flow. Second operand has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:06:26,237 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:06:26,237 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-20 16:06:26,237 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:06:27,677 INFO L124 PetriNetUnfolderBase]: 3974/6364 cut-off events. [2024-06-20 16:06:27,677 INFO L125 PetriNetUnfolderBase]: For 533580/533586 co-relation queries the response was YES. [2024-06-20 16:06:27,722 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57387 conditions, 6364 events. 3974/6364 cut-off events. For 533580/533586 co-relation queries the response was YES. Maximal size of possible extension queue 344. Compared 39184 event pairs, 693 based on Foata normal form. 24/6387 useless extension candidates. Maximal degree in co-relation 57271. Up to 5860 conditions per place. [2024-06-20 16:06:27,749 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 344 selfloop transitions, 52 changer transitions 0/400 dead transitions. [2024-06-20 16:06:27,749 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 261 places, 400 transitions, 6716 flow [2024-06-20 16:06:27,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 16:06:27,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 16:06:27,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 188 transitions. [2024-06-20 16:06:27,750 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4585365853658537 [2024-06-20 16:06:27,750 INFO L175 Difference]: Start difference. First operand has 252 places, 354 transitions, 5375 flow. Second operand 10 states and 188 transitions. [2024-06-20 16:06:27,750 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 261 places, 400 transitions, 6716 flow [2024-06-20 16:06:28,624 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 254 places, 400 transitions, 6509 flow, removed 52 selfloop flow, removed 7 redundant places. [2024-06-20 16:06:28,629 INFO L231 Difference]: Finished difference. Result has 255 places, 356 transitions, 5427 flow [2024-06-20 16:06:28,629 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5168, PETRI_DIFFERENCE_MINUEND_PLACES=245, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=354, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=302, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5427, PETRI_PLACES=255, PETRI_TRANSITIONS=356} [2024-06-20 16:06:28,629 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 213 predicate places. [2024-06-20 16:06:28,630 INFO L495 AbstractCegarLoop]: Abstraction has has 255 places, 356 transitions, 5427 flow [2024-06-20 16:06:28,630 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:06:28,630 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:06:28,630 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:06:28,630 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2024-06-20 16:06:28,630 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:06:28,630 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:06:28,630 INFO L85 PathProgramCache]: Analyzing trace with hash -389178525, now seen corresponding path program 4 times [2024-06-20 16:06:28,631 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:06:28,631 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1460582331] [2024-06-20 16:06:28,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:06:28,631 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:06:28,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:06:29,779 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:06:29,780 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:06:29,780 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1460582331] [2024-06-20 16:06:29,780 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1460582331] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:06:29,780 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:06:29,780 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 16:06:29,780 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1666560360] [2024-06-20 16:06:29,780 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:06:29,781 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 16:06:29,781 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:06:29,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 16:06:29,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-20 16:06:29,876 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-20 16:06:29,876 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 255 places, 356 transitions, 5427 flow. Second operand has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:06:29,876 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:06:29,877 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-20 16:06:29,877 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:06:31,232 INFO L124 PetriNetUnfolderBase]: 4042/6480 cut-off events. [2024-06-20 16:06:31,232 INFO L125 PetriNetUnfolderBase]: For 551309/551315 co-relation queries the response was YES. [2024-06-20 16:06:31,279 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58376 conditions, 6480 events. 4042/6480 cut-off events. For 551309/551315 co-relation queries the response was YES. Maximal size of possible extension queue 350. Compared 40249 event pairs, 817 based on Foata normal form. 24/6503 useless extension candidates. Maximal degree in co-relation 58259. Up to 5931 conditions per place. [2024-06-20 16:06:31,306 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 347 selfloop transitions, 50 changer transitions 0/401 dead transitions. [2024-06-20 16:06:31,306 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 264 places, 401 transitions, 6931 flow [2024-06-20 16:06:31,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 16:06:31,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 16:06:31,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 188 transitions. [2024-06-20 16:06:31,307 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4585365853658537 [2024-06-20 16:06:31,307 INFO L175 Difference]: Start difference. First operand has 255 places, 356 transitions, 5427 flow. Second operand 10 states and 188 transitions. [2024-06-20 16:06:31,308 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 264 places, 401 transitions, 6931 flow [2024-06-20 16:06:32,273 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 258 places, 401 transitions, 6740 flow, removed 54 selfloop flow, removed 6 redundant places. [2024-06-20 16:06:32,278 INFO L231 Difference]: Finished difference. Result has 259 places, 358 transitions, 5495 flow [2024-06-20 16:06:32,278 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5236, PETRI_DIFFERENCE_MINUEND_PLACES=249, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=356, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=306, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5495, PETRI_PLACES=259, PETRI_TRANSITIONS=358} [2024-06-20 16:06:32,278 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 217 predicate places. [2024-06-20 16:06:32,279 INFO L495 AbstractCegarLoop]: Abstraction has has 259 places, 358 transitions, 5495 flow [2024-06-20 16:06:32,279 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:06:32,279 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:06:32,279 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:06:32,279 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2024-06-20 16:06:32,279 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)] === [2024-06-20 16:06:32,279 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:06:32,279 INFO L85 PathProgramCache]: Analyzing trace with hash -1704552122, now seen corresponding path program 1 times [2024-06-20 16:06:32,280 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:06:32,280 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1160432273] [2024-06-20 16:06:32,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:06:32,280 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:06:32,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:06:32,902 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:06:32,902 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:06:32,902 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1160432273] [2024-06-20 16:06:32,902 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1160432273] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:06:32,903 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:06:32,903 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 16:06:32,903 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1971479472] [2024-06-20 16:06:32,903 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:06:32,903 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 16:06:32,903 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:06:32,903 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 16:06:32,903 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-20 16:06:32,956 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-20 16:06:32,956 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 259 places, 358 transitions, 5495 flow. Second operand has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:06:32,957 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:06:32,957 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-20 16:06:32,957 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:06:34,174 INFO L124 PetriNetUnfolderBase]: 4046/6488 cut-off events. [2024-06-20 16:06:34,174 INFO L125 PetriNetUnfolderBase]: For 524125/524131 co-relation queries the response was YES. [2024-06-20 16:06:34,223 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57968 conditions, 6488 events. 4046/6488 cut-off events. For 524125/524131 co-relation queries the response was YES. Maximal size of possible extension queue 350. Compared 40340 event pairs, 866 based on Foata normal form. 10/6497 useless extension candidates. Maximal degree in co-relation 57850. Up to 6174 conditions per place. [2024-06-20 16:06:34,250 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 335 selfloop transitions, 45 changer transitions 0/384 dead transitions. [2024-06-20 16:06:34,250 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 265 places, 384 transitions, 6575 flow [2024-06-20 16:06:34,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 16:06:34,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 16:06:34,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 130 transitions. [2024-06-20 16:06:34,251 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4529616724738676 [2024-06-20 16:06:34,251 INFO L175 Difference]: Start difference. First operand has 259 places, 358 transitions, 5495 flow. Second operand 7 states and 130 transitions. [2024-06-20 16:06:34,251 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 265 places, 384 transitions, 6575 flow [2024-06-20 16:06:35,373 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 257 places, 384 transitions, 6358 flow, removed 56 selfloop flow, removed 8 redundant places. [2024-06-20 16:06:35,377 INFO L231 Difference]: Finished difference. Result has 258 places, 363 transitions, 5494 flow [2024-06-20 16:06:35,378 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5286, PETRI_DIFFERENCE_MINUEND_PLACES=251, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=358, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=316, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5494, PETRI_PLACES=258, PETRI_TRANSITIONS=363} [2024-06-20 16:06:35,378 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 216 predicate places. [2024-06-20 16:06:35,378 INFO L495 AbstractCegarLoop]: Abstraction has has 258 places, 363 transitions, 5494 flow [2024-06-20 16:06:35,378 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:06:35,378 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:06:35,378 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:06:35,378 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2024-06-20 16:06:35,378 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)] === [2024-06-20 16:06:35,379 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:06:35,379 INFO L85 PathProgramCache]: Analyzing trace with hash 398598436, now seen corresponding path program 2 times [2024-06-20 16:06:35,379 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:06:35,379 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1813791825] [2024-06-20 16:06:35,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:06:35,379 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:06:35,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:06:35,949 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:06:35,950 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:06:35,950 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1813791825] [2024-06-20 16:06:35,950 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1813791825] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:06:35,950 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:06:35,950 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 16:06:35,950 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1899531612] [2024-06-20 16:06:35,950 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:06:35,950 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 16:06:35,950 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:06:35,950 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 16:06:35,951 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-20 16:06:36,009 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-20 16:06:36,010 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 258 places, 363 transitions, 5494 flow. Second operand has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:06:36,010 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:06:36,010 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-20 16:06:36,010 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:06:37,294 INFO L124 PetriNetUnfolderBase]: 4056/6506 cut-off events. [2024-06-20 16:06:37,294 INFO L125 PetriNetUnfolderBase]: For 515713/515719 co-relation queries the response was YES. [2024-06-20 16:06:37,343 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57412 conditions, 6506 events. 4056/6506 cut-off events. For 515713/515719 co-relation queries the response was YES. Maximal size of possible extension queue 351. Compared 40451 event pairs, 864 based on Foata normal form. 8/6513 useless extension candidates. Maximal degree in co-relation 57293. Up to 6280 conditions per place. [2024-06-20 16:06:37,370 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 352 selfloop transitions, 30 changer transitions 0/386 dead transitions. [2024-06-20 16:06:37,370 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 264 places, 386 transitions, 6454 flow [2024-06-20 16:06:37,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 16:06:37,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 16:06:37,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 122 transitions. [2024-06-20 16:06:37,371 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4250871080139373 [2024-06-20 16:06:37,371 INFO L175 Difference]: Start difference. First operand has 258 places, 363 transitions, 5494 flow. Second operand 7 states and 122 transitions. [2024-06-20 16:06:37,371 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 264 places, 386 transitions, 6454 flow [2024-06-20 16:06:38,610 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 260 places, 386 transitions, 6369 flow, removed 14 selfloop flow, removed 4 redundant places. [2024-06-20 16:06:38,614 INFO L231 Difference]: Finished difference. Result has 261 places, 369 transitions, 5613 flow [2024-06-20 16:06:38,615 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5414, PETRI_DIFFERENCE_MINUEND_PLACES=254, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=363, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=334, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5613, PETRI_PLACES=261, PETRI_TRANSITIONS=369} [2024-06-20 16:06:38,615 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 219 predicate places. [2024-06-20 16:06:38,615 INFO L495 AbstractCegarLoop]: Abstraction has has 261 places, 369 transitions, 5613 flow [2024-06-20 16:06:38,615 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:06:38,615 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:06:38,615 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:06:38,615 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2024-06-20 16:06:38,615 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)] === [2024-06-20 16:06:38,615 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:06:38,616 INFO L85 PathProgramCache]: Analyzing trace with hash 398606372, now seen corresponding path program 1 times [2024-06-20 16:06:38,616 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:06:38,616 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [959635680] [2024-06-20 16:06:38,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:06:38,616 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:06:38,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:06:39,403 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:06:39,403 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:06:39,403 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [959635680] [2024-06-20 16:06:39,403 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [959635680] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:06:39,403 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:06:39,403 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:06:39,403 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [76672738] [2024-06-20 16:06:39,403 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:06:39,403 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:06:39,404 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:06:39,404 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:06:39,404 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:06:39,488 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-20 16:06:39,488 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 261 places, 369 transitions, 5613 flow. Second operand has 10 states, 10 states have (on average 10.5) internal successors, (105), 10 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:06:39,488 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:06:39,488 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-20 16:06:39,488 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:06:40,955 INFO L124 PetriNetUnfolderBase]: 4108/6570 cut-off events. [2024-06-20 16:06:40,955 INFO L125 PetriNetUnfolderBase]: For 542460/542462 co-relation queries the response was YES. [2024-06-20 16:06:41,014 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58323 conditions, 6570 events. 4108/6570 cut-off events. For 542460/542462 co-relation queries the response was YES. Maximal size of possible extension queue 344. Compared 40642 event pairs, 880 based on Foata normal form. 6/6575 useless extension candidates. Maximal degree in co-relation 58203. Up to 6190 conditions per place. [2024-06-20 16:06:41,043 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 333 selfloop transitions, 66 changer transitions 0/403 dead transitions. [2024-06-20 16:06:41,043 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 269 places, 403 transitions, 6991 flow [2024-06-20 16:06:41,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:06:41,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:06:41,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 159 transitions. [2024-06-20 16:06:41,044 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43089430894308944 [2024-06-20 16:06:41,044 INFO L175 Difference]: Start difference. First operand has 261 places, 369 transitions, 5613 flow. Second operand 9 states and 159 transitions. [2024-06-20 16:06:41,044 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 269 places, 403 transitions, 6991 flow [2024-06-20 16:06:42,151 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 265 places, 403 transitions, 6903 flow, removed 18 selfloop flow, removed 4 redundant places. [2024-06-20 16:06:42,156 INFO L231 Difference]: Finished difference. Result has 266 places, 378 transitions, 5834 flow [2024-06-20 16:06:42,156 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5533, PETRI_DIFFERENCE_MINUEND_PLACES=257, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=369, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=309, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5834, PETRI_PLACES=266, PETRI_TRANSITIONS=378} [2024-06-20 16:06:42,156 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 224 predicate places. [2024-06-20 16:06:42,157 INFO L495 AbstractCegarLoop]: Abstraction has has 266 places, 378 transitions, 5834 flow [2024-06-20 16:06:42,157 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.5) internal successors, (105), 10 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:06:42,157 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:06:42,157 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:06:42,157 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2024-06-20 16:06:42,157 INFO L420 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-20 16:06:42,157 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:06:42,157 INFO L85 PathProgramCache]: Analyzing trace with hash -1593124163, now seen corresponding path program 5 times [2024-06-20 16:06:42,157 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:06:42,157 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [984487834] [2024-06-20 16:06:42,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:06:42,157 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:06:42,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:06:43,320 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:06:43,321 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:06:43,321 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [984487834] [2024-06-20 16:06:43,321 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [984487834] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:06:43,321 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:06:43,321 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 16:06:43,321 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [40354485] [2024-06-20 16:06:43,321 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:06:43,321 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 16:06:43,321 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:06:43,321 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 16:06:43,321 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-20 16:06:43,437 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-20 16:06:43,437 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 266 places, 378 transitions, 5834 flow. Second operand has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:06:43,437 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:06:43,437 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-20 16:06:43,437 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:06:44,926 INFO L124 PetriNetUnfolderBase]: 4115/6591 cut-off events. [2024-06-20 16:06:44,926 INFO L125 PetriNetUnfolderBase]: For 571830/571840 co-relation queries the response was YES. [2024-06-20 16:06:44,971 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58704 conditions, 6591 events. 4115/6591 cut-off events. For 571830/571840 co-relation queries the response was YES. Maximal size of possible extension queue 351. Compared 40933 event pairs, 827 based on Foata normal form. 28/6618 useless extension candidates. Maximal degree in co-relation 58583. Up to 5848 conditions per place. [2024-06-20 16:06:44,996 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 331 selfloop transitions, 85 changer transitions 0/420 dead transitions. [2024-06-20 16:06:44,996 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 274 places, 420 transitions, 7348 flow [2024-06-20 16:06:44,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 16:06:44,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 16:06:44,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 189 transitions. [2024-06-20 16:06:44,997 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4609756097560976 [2024-06-20 16:06:44,997 INFO L175 Difference]: Start difference. First operand has 266 places, 378 transitions, 5834 flow. Second operand 10 states and 189 transitions. [2024-06-20 16:06:44,997 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 274 places, 420 transitions, 7348 flow [2024-06-20 16:06:46,271 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 270 places, 420 transitions, 7265 flow, removed 26 selfloop flow, removed 4 redundant places. [2024-06-20 16:06:46,276 INFO L231 Difference]: Finished difference. Result has 271 places, 378 transitions, 5891 flow [2024-06-20 16:06:46,276 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5650, PETRI_DIFFERENCE_MINUEND_PLACES=261, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=377, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=84, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=292, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5891, PETRI_PLACES=271, PETRI_TRANSITIONS=378} [2024-06-20 16:06:46,276 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 229 predicate places. [2024-06-20 16:06:46,276 INFO L495 AbstractCegarLoop]: Abstraction has has 271 places, 378 transitions, 5891 flow [2024-06-20 16:06:46,276 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:06:46,277 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:06:46,277 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:06:46,277 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2024-06-20 16:06:46,277 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)] === [2024-06-20 16:06:46,277 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:06:46,277 INFO L85 PathProgramCache]: Analyzing trace with hash -1698123032, now seen corresponding path program 3 times [2024-06-20 16:06:46,277 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:06:46,277 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1697536144] [2024-06-20 16:06:46,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:06:46,277 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:06:46,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:06:46,934 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:06:46,934 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:06:46,935 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1697536144] [2024-06-20 16:06:46,935 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1697536144] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:06:46,935 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:06:46,935 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 16:06:46,935 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1325242875] [2024-06-20 16:06:46,935 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:06:46,935 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 16:06:46,935 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:06:46,935 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 16:06:46,935 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-20 16:06:46,981 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-20 16:06:46,981 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 271 places, 378 transitions, 5891 flow. Second operand has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:06:46,981 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:06:46,981 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-20 16:06:46,981 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:06:48,301 INFO L124 PetriNetUnfolderBase]: 4135/6623 cut-off events. [2024-06-20 16:06:48,301 INFO L125 PetriNetUnfolderBase]: For 562301/562311 co-relation queries the response was YES. [2024-06-20 16:06:48,350 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59522 conditions, 6623 events. 4135/6623 cut-off events. For 562301/562311 co-relation queries the response was YES. Maximal size of possible extension queue 354. Compared 41122 event pairs, 876 based on Foata normal form. 14/6636 useless extension candidates. Maximal degree in co-relation 59399. Up to 6134 conditions per place. [2024-06-20 16:06:48,378 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 320 selfloop transitions, 81 changer transitions 0/405 dead transitions. [2024-06-20 16:06:48,379 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 277 places, 405 transitions, 7167 flow [2024-06-20 16:06:48,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 16:06:48,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 16:06:48,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 131 transitions. [2024-06-20 16:06:48,380 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4564459930313589 [2024-06-20 16:06:48,380 INFO L175 Difference]: Start difference. First operand has 271 places, 378 transitions, 5891 flow. Second operand 7 states and 131 transitions. [2024-06-20 16:06:48,380 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 277 places, 405 transitions, 7167 flow [2024-06-20 16:06:49,410 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 270 places, 405 transitions, 6888 flow, removed 58 selfloop flow, removed 7 redundant places. [2024-06-20 16:06:49,415 INFO L231 Difference]: Finished difference. Result has 271 places, 385 transitions, 5915 flow [2024-06-20 16:06:49,416 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5623, PETRI_DIFFERENCE_MINUEND_PLACES=264, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=378, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=302, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5915, PETRI_PLACES=271, PETRI_TRANSITIONS=385} [2024-06-20 16:06:49,416 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 229 predicate places. [2024-06-20 16:06:49,416 INFO L495 AbstractCegarLoop]: Abstraction has has 271 places, 385 transitions, 5915 flow [2024-06-20 16:06:49,416 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:06:49,416 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:06:49,416 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:06:49,416 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2024-06-20 16:06:49,416 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)] === [2024-06-20 16:06:49,416 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:06:49,417 INFO L85 PathProgramCache]: Analyzing trace with hash 1600422180, now seen corresponding path program 4 times [2024-06-20 16:06:49,417 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:06:49,417 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1259199592] [2024-06-20 16:06:49,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:06:49,417 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:06:49,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:06:50,044 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:06:50,044 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:06:50,044 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1259199592] [2024-06-20 16:06:50,044 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1259199592] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:06:50,044 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:06:50,045 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 16:06:50,045 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2058033020] [2024-06-20 16:06:50,045 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:06:50,045 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 16:06:50,045 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:06:50,045 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 16:06:50,045 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-20 16:06:50,096 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-20 16:06:50,096 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 271 places, 385 transitions, 5915 flow. Second operand has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:06:50,096 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:06:50,096 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-20 16:06:50,096 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:06:51,370 INFO L124 PetriNetUnfolderBase]: 4139/6633 cut-off events. [2024-06-20 16:06:51,370 INFO L125 PetriNetUnfolderBase]: For 553443/553453 co-relation queries the response was YES. [2024-06-20 16:06:51,422 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58730 conditions, 6633 events. 4139/6633 cut-off events. For 553443/553453 co-relation queries the response was YES. Maximal size of possible extension queue 354. Compared 41267 event pairs, 875 based on Foata normal form. 14/6646 useless extension candidates. Maximal degree in co-relation 58606. Up to 6135 conditions per place. [2024-06-20 16:06:51,450 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 311 selfloop transitions, 93 changer transitions 0/408 dead transitions. [2024-06-20 16:06:51,450 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 277 places, 408 transitions, 7047 flow [2024-06-20 16:06:51,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 16:06:51,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 16:06:51,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 127 transitions. [2024-06-20 16:06:51,451 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4425087108013937 [2024-06-20 16:06:51,451 INFO L175 Difference]: Start difference. First operand has 271 places, 385 transitions, 5915 flow. Second operand 7 states and 127 transitions. [2024-06-20 16:06:51,451 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 277 places, 408 transitions, 7047 flow [2024-06-20 16:06:52,669 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 273 places, 408 transitions, 6900 flow, removed 14 selfloop flow, removed 4 redundant places. [2024-06-20 16:06:52,674 INFO L231 Difference]: Finished difference. Result has 274 places, 390 transitions, 6063 flow [2024-06-20 16:06:52,674 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5771, PETRI_DIFFERENCE_MINUEND_PLACES=267, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=385, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=295, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6063, PETRI_PLACES=274, PETRI_TRANSITIONS=390} [2024-06-20 16:06:52,675 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 232 predicate places. [2024-06-20 16:06:52,675 INFO L495 AbstractCegarLoop]: Abstraction has has 274 places, 390 transitions, 6063 flow [2024-06-20 16:06:52,675 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:06:52,675 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:06:52,675 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:06:52,675 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2024-06-20 16:06:52,675 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)] === [2024-06-20 16:06:52,675 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:06:52,675 INFO L85 PathProgramCache]: Analyzing trace with hash 145215558, now seen corresponding path program 5 times [2024-06-20 16:06:52,675 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:06:52,675 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1575797289] [2024-06-20 16:06:52,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:06:52,676 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:06:52,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:06:53,246 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:06:53,246 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:06:53,246 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1575797289] [2024-06-20 16:06:53,247 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1575797289] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:06:53,247 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:06:53,247 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 16:06:53,247 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1306256046] [2024-06-20 16:06:53,247 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:06:53,247 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 16:06:53,247 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:06:53,247 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 16:06:53,247 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-20 16:06:53,306 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-20 16:06:53,306 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 274 places, 390 transitions, 6063 flow. Second operand has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:06:53,307 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:06:53,307 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-20 16:06:53,307 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:06:54,561 INFO L124 PetriNetUnfolderBase]: 4078/6526 cut-off events. [2024-06-20 16:06:54,561 INFO L125 PetriNetUnfolderBase]: For 554240/554250 co-relation queries the response was YES. [2024-06-20 16:06:54,612 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57818 conditions, 6526 events. 4078/6526 cut-off events. For 554240/554250 co-relation queries the response was YES. Maximal size of possible extension queue 352. Compared 40380 event pairs, 855 based on Foata normal form. 12/6537 useless extension candidates. Maximal degree in co-relation 57693. Up to 6300 conditions per place. [2024-06-20 16:06:54,638 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 369 selfloop transitions, 29 changer transitions 0/402 dead transitions. [2024-06-20 16:06:54,638 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 280 places, 402 transitions, 6916 flow [2024-06-20 16:06:54,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 16:06:54,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 16:06:54,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 115 transitions. [2024-06-20 16:06:54,639 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40069686411149824 [2024-06-20 16:06:54,639 INFO L175 Difference]: Start difference. First operand has 274 places, 390 transitions, 6063 flow. Second operand 7 states and 115 transitions. [2024-06-20 16:06:54,639 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 280 places, 402 transitions, 6916 flow [2024-06-20 16:06:55,746 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 276 places, 402 transitions, 6745 flow, removed 29 selfloop flow, removed 4 redundant places. [2024-06-20 16:06:55,751 INFO L231 Difference]: Finished difference. Result has 277 places, 390 transitions, 5960 flow [2024-06-20 16:06:55,751 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5894, PETRI_DIFFERENCE_MINUEND_PLACES=270, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=390, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=361, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5960, PETRI_PLACES=277, PETRI_TRANSITIONS=390} [2024-06-20 16:06:55,751 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 235 predicate places. [2024-06-20 16:06:55,751 INFO L495 AbstractCegarLoop]: Abstraction has has 277 places, 390 transitions, 5960 flow [2024-06-20 16:06:55,752 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:06:55,752 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:06:55,752 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:06:55,752 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2024-06-20 16:06:55,752 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)] === [2024-06-20 16:06:55,752 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:06:55,752 INFO L85 PathProgramCache]: Analyzing trace with hash -1498435292, now seen corresponding path program 6 times [2024-06-20 16:06:55,752 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:06:55,753 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2086336687] [2024-06-20 16:06:55,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:06:55,753 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:06:55,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:06:56,355 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:06:56,356 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:06:56,356 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2086336687] [2024-06-20 16:06:56,356 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2086336687] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:06:56,356 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:06:56,356 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 16:06:56,356 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1259800637] [2024-06-20 16:06:56,356 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:06:56,356 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 16:06:56,356 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:06:56,356 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 16:06:56,357 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-20 16:06:56,411 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-20 16:06:56,411 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 277 places, 390 transitions, 5960 flow. Second operand has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:06:56,411 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:06:56,411 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-20 16:06:56,411 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:06:57,623 INFO L124 PetriNetUnfolderBase]: 4017/6417 cut-off events. [2024-06-20 16:06:57,623 INFO L125 PetriNetUnfolderBase]: For 558570/558580 co-relation queries the response was YES. [2024-06-20 16:06:57,672 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56643 conditions, 6417 events. 4017/6417 cut-off events. For 558570/558580 co-relation queries the response was YES. Maximal size of possible extension queue 350. Compared 39540 event pairs, 842 based on Foata normal form. 12/6428 useless extension candidates. Maximal degree in co-relation 56517. Up to 6178 conditions per place. [2024-06-20 16:06:57,697 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 358 selfloop transitions, 41 changer transitions 0/403 dead transitions. [2024-06-20 16:06:57,697 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 283 places, 403 transitions, 6824 flow [2024-06-20 16:06:57,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 16:06:57,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 16:06:57,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 117 transitions. [2024-06-20 16:06:57,698 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4076655052264808 [2024-06-20 16:06:57,698 INFO L175 Difference]: Start difference. First operand has 277 places, 390 transitions, 5960 flow. Second operand 7 states and 117 transitions. [2024-06-20 16:06:57,698 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 283 places, 403 transitions, 6824 flow [2024-06-20 16:06:58,798 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 275 places, 403 transitions, 6647 flow, removed 24 selfloop flow, removed 8 redundant places. [2024-06-20 16:06:58,803 INFO L231 Difference]: Finished difference. Result has 276 places, 390 transitions, 5875 flow [2024-06-20 16:06:58,803 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5785, PETRI_DIFFERENCE_MINUEND_PLACES=269, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=390, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=349, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5875, PETRI_PLACES=276, PETRI_TRANSITIONS=390} [2024-06-20 16:06:58,804 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 234 predicate places. [2024-06-20 16:06:58,804 INFO L495 AbstractCegarLoop]: Abstraction has has 276 places, 390 transitions, 5875 flow [2024-06-20 16:06:58,804 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:06:58,804 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:06:58,804 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:06:58,804 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2024-06-20 16:06:58,804 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)] === [2024-06-20 16:06:58,804 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:06:58,804 INFO L85 PathProgramCache]: Analyzing trace with hash -1504141276, now seen corresponding path program 2 times [2024-06-20 16:06:58,804 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:06:58,804 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [321996710] [2024-06-20 16:06:58,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:06:58,804 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:06:58,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:06:59,592 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:06:59,592 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:06:59,592 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [321996710] [2024-06-20 16:06:59,592 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [321996710] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:06:59,592 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:06:59,593 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:06:59,593 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1120154580] [2024-06-20 16:06:59,593 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:06:59,593 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:06:59,593 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:06:59,593 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:06:59,593 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:06:59,685 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-20 16:06:59,685 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 276 places, 390 transitions, 5875 flow. Second operand has 10 states, 10 states have (on average 10.5) internal successors, (105), 10 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:06:59,685 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:06:59,685 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-20 16:06:59,685 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:07:01,110 INFO L124 PetriNetUnfolderBase]: 4037/6438 cut-off events. [2024-06-20 16:07:01,110 INFO L125 PetriNetUnfolderBase]: For 576530/576532 co-relation queries the response was YES. [2024-06-20 16:07:01,163 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56915 conditions, 6438 events. 4037/6438 cut-off events. For 576530/576532 co-relation queries the response was YES. Maximal size of possible extension queue 343. Compared 39469 event pairs, 856 based on Foata normal form. 6/6443 useless extension candidates. Maximal degree in co-relation 56789. Up to 6047 conditions per place. [2024-06-20 16:07:01,192 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 341 selfloop transitions, 68 changer transitions 0/413 dead transitions. [2024-06-20 16:07:01,192 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 284 places, 413 transitions, 7152 flow [2024-06-20 16:07:01,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:07:01,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:07:01,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 153 transitions. [2024-06-20 16:07:01,193 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4146341463414634 [2024-06-20 16:07:01,193 INFO L175 Difference]: Start difference. First operand has 276 places, 390 transitions, 5875 flow. Second operand 9 states and 153 transitions. [2024-06-20 16:07:01,193 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 284 places, 413 transitions, 7152 flow [2024-06-20 16:07:02,682 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 275 places, 413 transitions, 6860 flow, removed 7 selfloop flow, removed 9 redundant places. [2024-06-20 16:07:02,687 INFO L231 Difference]: Finished difference. Result has 276 places, 393 transitions, 5779 flow [2024-06-20 16:07:02,687 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5585, PETRI_DIFFERENCE_MINUEND_PLACES=267, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=390, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=325, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5779, PETRI_PLACES=276, PETRI_TRANSITIONS=393} [2024-06-20 16:07:02,688 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 234 predicate places. [2024-06-20 16:07:02,688 INFO L495 AbstractCegarLoop]: Abstraction has has 276 places, 393 transitions, 5779 flow [2024-06-20 16:07:02,688 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.5) internal successors, (105), 10 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:07:02,688 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:07:02,688 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:07:02,688 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2024-06-20 16:07:02,688 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)] === [2024-06-20 16:07:02,688 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:07:02,688 INFO L85 PathProgramCache]: Analyzing trace with hash -1885214078, now seen corresponding path program 3 times [2024-06-20 16:07:02,688 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:07:02,688 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [394238795] [2024-06-20 16:07:02,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:07:02,689 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:07:02,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:07:03,361 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:07:03,361 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:07:03,361 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [394238795] [2024-06-20 16:07:03,361 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [394238795] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:07:03,361 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:07:03,361 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:07:03,361 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [559665010] [2024-06-20 16:07:03,361 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:07:03,361 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:07:03,362 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:07:03,362 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:07:03,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:07:03,433 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-20 16:07:03,438 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 276 places, 393 transitions, 5779 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 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) [2024-06-20 16:07:03,439 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:07:03,439 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-20 16:07:03,439 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:07:04,884 INFO L124 PetriNetUnfolderBase]: 4057/6467 cut-off events. [2024-06-20 16:07:04,885 INFO L125 PetriNetUnfolderBase]: For 589685/589689 co-relation queries the response was YES. [2024-06-20 16:07:04,938 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57314 conditions, 6467 events. 4057/6467 cut-off events. For 589685/589689 co-relation queries the response was YES. Maximal size of possible extension queue 353. Compared 39769 event pairs, 856 based on Foata normal form. 4/6469 useless extension candidates. Maximal degree in co-relation 57187. Up to 6063 conditions per place. [2024-06-20 16:07:04,965 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 335 selfloop transitions, 75 changer transitions 0/414 dead transitions. [2024-06-20 16:07:04,965 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 283 places, 414 transitions, 7039 flow [2024-06-20 16:07:04,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:07:04,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:07:04,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 140 transitions. [2024-06-20 16:07:04,966 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4268292682926829 [2024-06-20 16:07:04,966 INFO L175 Difference]: Start difference. First operand has 276 places, 393 transitions, 5779 flow. Second operand 8 states and 140 transitions. [2024-06-20 16:07:04,966 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 283 places, 414 transitions, 7039 flow [2024-06-20 16:07:06,220 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 277 places, 414 transitions, 6888 flow, removed 18 selfloop flow, removed 6 redundant places. [2024-06-20 16:07:06,225 INFO L231 Difference]: Finished difference. Result has 278 places, 396 transitions, 5842 flow [2024-06-20 16:07:06,225 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5634, PETRI_DIFFERENCE_MINUEND_PLACES=270, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=393, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=321, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5842, PETRI_PLACES=278, PETRI_TRANSITIONS=396} [2024-06-20 16:07:06,225 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 236 predicate places. [2024-06-20 16:07:06,225 INFO L495 AbstractCegarLoop]: Abstraction has has 278 places, 396 transitions, 5842 flow [2024-06-20 16:07:06,226 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 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) [2024-06-20 16:07:06,226 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:07:06,226 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:07:06,226 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2024-06-20 16:07:06,226 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)] === [2024-06-20 16:07:06,226 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:07:06,226 INFO L85 PathProgramCache]: Analyzing trace with hash 1006864418, now seen corresponding path program 4 times [2024-06-20 16:07:06,226 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:07:06,226 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1259230077] [2024-06-20 16:07:06,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:07:06,226 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:07:06,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:07:07,046 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:07:07,046 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:07:07,048 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1259230077] [2024-06-20 16:07:07,048 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1259230077] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:07:07,048 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:07:07,048 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:07:07,048 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1400478159] [2024-06-20 16:07:07,048 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:07:07,049 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:07:07,049 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:07:07,049 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:07:07,049 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:07:07,160 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-20 16:07:07,161 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 278 places, 396 transitions, 5842 flow. Second operand has 10 states, 10 states have (on average 10.5) internal successors, (105), 10 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:07:07,161 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:07:07,161 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-20 16:07:07,161 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:07:08,590 INFO L124 PetriNetUnfolderBase]: 4045/6455 cut-off events. [2024-06-20 16:07:08,590 INFO L125 PetriNetUnfolderBase]: For 590832/590834 co-relation queries the response was YES. [2024-06-20 16:07:08,647 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57037 conditions, 6455 events. 4045/6455 cut-off events. For 590832/590834 co-relation queries the response was YES. Maximal size of possible extension queue 352. Compared 39828 event pairs, 860 based on Foata normal form. 4/6458 useless extension candidates. Maximal degree in co-relation 56909. Up to 6252 conditions per place. [2024-06-20 16:07:08,675 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 383 selfloop transitions, 21 changer transitions 0/408 dead transitions. [2024-06-20 16:07:08,675 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 286 places, 408 transitions, 6696 flow [2024-06-20 16:07:08,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:07:08,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:07:08,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 138 transitions. [2024-06-20 16:07:08,676 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37398373983739835 [2024-06-20 16:07:08,676 INFO L175 Difference]: Start difference. First operand has 278 places, 396 transitions, 5842 flow. Second operand 9 states and 138 transitions. [2024-06-20 16:07:08,676 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 286 places, 408 transitions, 6696 flow [2024-06-20 16:07:10,124 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 281 places, 408 transitions, 6501 flow, removed 37 selfloop flow, removed 5 redundant places. [2024-06-20 16:07:10,129 INFO L231 Difference]: Finished difference. Result has 282 places, 396 transitions, 5696 flow [2024-06-20 16:07:10,129 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5647, PETRI_DIFFERENCE_MINUEND_PLACES=273, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=396, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=375, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5696, PETRI_PLACES=282, PETRI_TRANSITIONS=396} [2024-06-20 16:07:10,129 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 240 predicate places. [2024-06-20 16:07:10,129 INFO L495 AbstractCegarLoop]: Abstraction has has 282 places, 396 transitions, 5696 flow [2024-06-20 16:07:10,129 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.5) internal successors, (105), 10 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:07:10,129 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:07:10,129 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:07:10,130 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2024-06-20 16:07:10,130 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)] === [2024-06-20 16:07:10,130 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:07:10,130 INFO L85 PathProgramCache]: Analyzing trace with hash -532233338, now seen corresponding path program 5 times [2024-06-20 16:07:10,130 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:07:10,130 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [475721478] [2024-06-20 16:07:10,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:07:10,130 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:07:10,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:07:10,760 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:07:10,760 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:07:10,760 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [475721478] [2024-06-20 16:07:10,760 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [475721478] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:07:10,760 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:07:10,760 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:07:10,760 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1023286327] [2024-06-20 16:07:10,761 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:07:10,761 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:07:10,761 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:07:10,761 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:07:10,761 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:07:10,835 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-20 16:07:10,835 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 282 places, 396 transitions, 5696 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 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) [2024-06-20 16:07:10,835 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:07:10,835 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-20 16:07:10,836 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:07:12,222 INFO L124 PetriNetUnfolderBase]: 4053/6467 cut-off events. [2024-06-20 16:07:12,223 INFO L125 PetriNetUnfolderBase]: For 591559/591561 co-relation queries the response was YES. [2024-06-20 16:07:12,275 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56605 conditions, 6467 events. 4053/6467 cut-off events. For 591559/591561 co-relation queries the response was YES. Maximal size of possible extension queue 349. Compared 39827 event pairs, 841 based on Foata normal form. 6/6472 useless extension candidates. Maximal degree in co-relation 56476. Up to 6063 conditions per place. [2024-06-20 16:07:12,302 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 345 selfloop transitions, 76 changer transitions 0/425 dead transitions. [2024-06-20 16:07:12,302 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 290 places, 425 transitions, 6694 flow [2024-06-20 16:07:12,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:07:12,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:07:12,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 162 transitions. [2024-06-20 16:07:12,303 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43902439024390244 [2024-06-20 16:07:12,303 INFO L175 Difference]: Start difference. First operand has 282 places, 396 transitions, 5696 flow. Second operand 9 states and 162 transitions. [2024-06-20 16:07:12,303 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 290 places, 425 transitions, 6694 flow [2024-06-20 16:07:13,581 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 279 places, 425 transitions, 6535 flow, removed 17 selfloop flow, removed 11 redundant places. [2024-06-20 16:07:13,586 INFO L231 Difference]: Finished difference. Result has 280 places, 399 transitions, 5724 flow [2024-06-20 16:07:13,586 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5537, PETRI_DIFFERENCE_MINUEND_PLACES=271, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=396, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=73, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=323, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5724, PETRI_PLACES=280, PETRI_TRANSITIONS=399} [2024-06-20 16:07:13,587 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 238 predicate places. [2024-06-20 16:07:13,587 INFO L495 AbstractCegarLoop]: Abstraction has has 280 places, 399 transitions, 5724 flow [2024-06-20 16:07:13,587 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 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) [2024-06-20 16:07:13,587 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:07:13,587 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:07:13,587 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2024-06-20 16:07:13,587 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)] === [2024-06-20 16:07:13,587 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:07:13,587 INFO L85 PathProgramCache]: Analyzing trace with hash 1596707326, now seen corresponding path program 1 times [2024-06-20 16:07:13,588 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:07:13,588 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [233467839] [2024-06-20 16:07:13,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:07:13,588 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:07:13,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:07:14,435 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:07:14,435 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:07:14,435 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [233467839] [2024-06-20 16:07:14,435 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [233467839] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:07:14,435 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:07:14,435 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 16:07:14,435 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1314678413] [2024-06-20 16:07:14,435 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:07:14,435 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 16:07:14,435 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:07:14,435 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 16:07:14,436 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-20 16:07:14,511 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 16:07:14,512 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 280 places, 399 transitions, 5724 flow. Second operand has 8 states, 8 states have (on average 11.875) internal successors, (95), 8 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:07:14,512 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:07:14,512 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 16:07:14,512 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:07:15,730 INFO L124 PetriNetUnfolderBase]: 3867/6263 cut-off events. [2024-06-20 16:07:15,731 INFO L125 PetriNetUnfolderBase]: For 513982/513992 co-relation queries the response was YES. [2024-06-20 16:07:15,781 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53499 conditions, 6263 events. 3867/6263 cut-off events. For 513982/513992 co-relation queries the response was YES. Maximal size of possible extension queue 347. Compared 39385 event pairs, 793 based on Foata normal form. 1/6248 useless extension candidates. Maximal degree in co-relation 53371. Up to 5951 conditions per place. [2024-06-20 16:07:15,805 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 377 selfloop transitions, 25 changer transitions 0/413 dead transitions. [2024-06-20 16:07:15,806 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 285 places, 413 transitions, 6662 flow [2024-06-20 16:07:15,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 16:07:15,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 16:07:15,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 113 transitions. [2024-06-20 16:07:15,806 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45934959349593496 [2024-06-20 16:07:15,807 INFO L175 Difference]: Start difference. First operand has 280 places, 399 transitions, 5724 flow. Second operand 6 states and 113 transitions. [2024-06-20 16:07:15,807 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 285 places, 413 transitions, 6662 flow [2024-06-20 16:07:16,961 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 277 places, 413 transitions, 6468 flow, removed 5 selfloop flow, removed 8 redundant places. [2024-06-20 16:07:16,966 INFO L231 Difference]: Finished difference. Result has 278 places, 402 transitions, 5699 flow [2024-06-20 16:07:16,966 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5530, PETRI_DIFFERENCE_MINUEND_PLACES=272, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=399, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=374, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=5699, PETRI_PLACES=278, PETRI_TRANSITIONS=402} [2024-06-20 16:07:16,967 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 236 predicate places. [2024-06-20 16:07:16,967 INFO L495 AbstractCegarLoop]: Abstraction has has 278 places, 402 transitions, 5699 flow [2024-06-20 16:07:16,967 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.875) internal successors, (95), 8 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:07:16,967 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:07:16,967 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:07:16,967 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2024-06-20 16:07:16,967 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)] === [2024-06-20 16:07:16,967 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:07:16,968 INFO L85 PathProgramCache]: Analyzing trace with hash 1600430271, now seen corresponding path program 1 times [2024-06-20 16:07:16,968 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:07:16,968 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [791527127] [2024-06-20 16:07:16,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:07:16,968 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:07:16,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:07:17,622 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:07:17,622 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:07:17,623 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [791527127] [2024-06-20 16:07:17,623 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [791527127] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:07:17,623 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:07:17,623 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 16:07:17,623 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1327109826] [2024-06-20 16:07:17,623 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:07:17,623 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 16:07:17,623 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:07:17,623 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 16:07:17,623 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-20 16:07:17,691 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 16:07:17,691 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 278 places, 402 transitions, 5699 flow. Second operand has 8 states, 8 states have (on average 11.875) internal successors, (95), 8 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:07:17,691 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:07:17,691 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 16:07:17,691 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:07:18,983 INFO L124 PetriNetUnfolderBase]: 3902/6320 cut-off events. [2024-06-20 16:07:18,983 INFO L125 PetriNetUnfolderBase]: For 531283/531293 co-relation queries the response was YES. [2024-06-20 16:07:19,027 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54321 conditions, 6320 events. 3902/6320 cut-off events. For 531283/531293 co-relation queries the response was YES. Maximal size of possible extension queue 351. Compared 39795 event pairs, 793 based on Foata normal form. 2/6306 useless extension candidates. Maximal degree in co-relation 54192. Up to 5958 conditions per place. [2024-06-20 16:07:19,048 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 374 selfloop transitions, 39 changer transitions 0/424 dead transitions. [2024-06-20 16:07:19,048 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 284 places, 424 transitions, 6779 flow [2024-06-20 16:07:19,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 16:07:19,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 16:07:19,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 135 transitions. [2024-06-20 16:07:19,049 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47038327526132406 [2024-06-20 16:07:19,049 INFO L175 Difference]: Start difference. First operand has 278 places, 402 transitions, 5699 flow. Second operand 7 states and 135 transitions. [2024-06-20 16:07:19,049 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 284 places, 424 transitions, 6779 flow [2024-06-20 16:07:20,371 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 279 places, 424 transitions, 6652 flow, removed 40 selfloop flow, removed 5 redundant places. [2024-06-20 16:07:20,376 INFO L231 Difference]: Finished difference. Result has 280 places, 405 transitions, 5700 flow [2024-06-20 16:07:20,376 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5574, PETRI_DIFFERENCE_MINUEND_PLACES=273, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=402, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=366, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5700, PETRI_PLACES=280, PETRI_TRANSITIONS=405} [2024-06-20 16:07:20,376 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 238 predicate places. [2024-06-20 16:07:20,376 INFO L495 AbstractCegarLoop]: Abstraction has has 280 places, 405 transitions, 5700 flow [2024-06-20 16:07:20,377 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.875) internal successors, (95), 8 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:07:20,377 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:07:20,377 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:07:20,377 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2024-06-20 16:07:20,377 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)] === [2024-06-20 16:07:20,377 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:07:20,377 INFO L85 PathProgramCache]: Analyzing trace with hash -1779046379, now seen corresponding path program 2 times [2024-06-20 16:07:20,377 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:07:20,378 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [351251351] [2024-06-20 16:07:20,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:07:20,378 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:07:20,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:07:21,106 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:07:21,106 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:07:21,106 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [351251351] [2024-06-20 16:07:21,107 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [351251351] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:07:21,107 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:07:21,107 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:07:21,107 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1741106687] [2024-06-20 16:07:21,107 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:07:21,107 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:07:21,107 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:07:21,107 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:07:21,107 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:07:21,223 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 16:07:21,223 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 280 places, 405 transitions, 5700 flow. Second operand has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:07:21,223 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:07:21,224 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 16:07:21,224 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:07:22,537 INFO L124 PetriNetUnfolderBase]: 3909/6329 cut-off events. [2024-06-20 16:07:22,537 INFO L125 PetriNetUnfolderBase]: For 532176/532186 co-relation queries the response was YES. [2024-06-20 16:07:22,585 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54409 conditions, 6329 events. 3909/6329 cut-off events. For 532176/532186 co-relation queries the response was YES. Maximal size of possible extension queue 351. Compared 39857 event pairs, 795 based on Foata normal form. 2/6315 useless extension candidates. Maximal degree in co-relation 54280. Up to 5968 conditions per place. [2024-06-20 16:07:22,608 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 375 selfloop transitions, 39 changer transitions 0/425 dead transitions. [2024-06-20 16:07:22,608 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 287 places, 425 transitions, 6780 flow [2024-06-20 16:07:22,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:07:22,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:07:22,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 146 transitions. [2024-06-20 16:07:22,609 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4451219512195122 [2024-06-20 16:07:22,609 INFO L175 Difference]: Start difference. First operand has 280 places, 405 transitions, 5700 flow. Second operand 8 states and 146 transitions. [2024-06-20 16:07:22,609 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 287 places, 425 transitions, 6780 flow [2024-06-20 16:07:23,714 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 282 places, 425 transitions, 6661 flow, removed 15 selfloop flow, removed 5 redundant places. [2024-06-20 16:07:23,719 INFO L231 Difference]: Finished difference. Result has 283 places, 408 transitions, 5713 flow [2024-06-20 16:07:23,719 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5587, PETRI_DIFFERENCE_MINUEND_PLACES=275, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=405, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=369, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5713, PETRI_PLACES=283, PETRI_TRANSITIONS=408} [2024-06-20 16:07:23,719 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 241 predicate places. [2024-06-20 16:07:23,719 INFO L495 AbstractCegarLoop]: Abstraction has has 283 places, 408 transitions, 5713 flow [2024-06-20 16:07:23,719 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:07:23,719 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:07:23,720 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:07:23,720 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2024-06-20 16:07:23,720 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)] === [2024-06-20 16:07:23,720 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:07:23,720 INFO L85 PathProgramCache]: Analyzing trace with hash 158294799, now seen corresponding path program 3 times [2024-06-20 16:07:23,720 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:07:23,720 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1831025380] [2024-06-20 16:07:23,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:07:23,720 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:07:23,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:07:24,385 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:07:24,385 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:07:24,385 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1831025380] [2024-06-20 16:07:24,385 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1831025380] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:07:24,385 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:07:24,385 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:07:24,385 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1187989893] [2024-06-20 16:07:24,385 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:07:24,385 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:07:24,385 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:07:24,386 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:07:24,386 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:07:24,480 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 16:07:24,480 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 283 places, 408 transitions, 5713 flow. Second operand has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:07:24,480 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:07:24,480 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 16:07:24,480 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:07:25,727 INFO L124 PetriNetUnfolderBase]: 3900/6310 cut-off events. [2024-06-20 16:07:25,727 INFO L125 PetriNetUnfolderBase]: For 544862/544872 co-relation queries the response was YES. [2024-06-20 16:07:25,775 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54306 conditions, 6310 events. 3900/6310 cut-off events. For 544862/544872 co-relation queries the response was YES. Maximal size of possible extension queue 352. Compared 39709 event pairs, 796 based on Foata normal form. 3/6297 useless extension candidates. Maximal degree in co-relation 54176. Up to 6024 conditions per place. [2024-06-20 16:07:25,800 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 392 selfloop transitions, 20 changer transitions 0/423 dead transitions. [2024-06-20 16:07:25,800 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 290 places, 423 transitions, 6619 flow [2024-06-20 16:07:25,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:07:25,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:07:25,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 134 transitions. [2024-06-20 16:07:25,801 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40853658536585363 [2024-06-20 16:07:25,801 INFO L175 Difference]: Start difference. First operand has 283 places, 408 transitions, 5713 flow. Second operand 8 states and 134 transitions. [2024-06-20 16:07:25,801 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 290 places, 423 transitions, 6619 flow [2024-06-20 16:07:27,079 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 285 places, 423 transitions, 6533 flow, removed 15 selfloop flow, removed 5 redundant places. [2024-06-20 16:07:27,084 INFO L231 Difference]: Finished difference. Result has 286 places, 411 transitions, 5727 flow [2024-06-20 16:07:27,084 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5630, PETRI_DIFFERENCE_MINUEND_PLACES=278, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=408, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=388, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5727, PETRI_PLACES=286, PETRI_TRANSITIONS=411} [2024-06-20 16:07:27,084 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 244 predicate places. [2024-06-20 16:07:27,084 INFO L495 AbstractCegarLoop]: Abstraction has has 286 places, 411 transitions, 5727 flow [2024-06-20 16:07:27,084 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:07:27,084 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:07:27,084 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:07:27,084 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2024-06-20 16:07:27,084 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)] === [2024-06-20 16:07:27,085 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:07:27,085 INFO L85 PathProgramCache]: Analyzing trace with hash -1498421621, now seen corresponding path program 4 times [2024-06-20 16:07:27,085 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:07:27,085 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1677198100] [2024-06-20 16:07:27,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:07:27,085 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:07:27,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:07:27,797 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:07:27,797 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:07:27,797 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1677198100] [2024-06-20 16:07:27,797 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1677198100] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:07:27,798 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:07:27,798 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:07:27,798 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1118509254] [2024-06-20 16:07:27,798 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:07:27,798 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:07:27,798 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:07:27,798 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:07:27,798 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:07:27,918 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 16:07:27,919 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 286 places, 411 transitions, 5727 flow. Second operand has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:07:27,919 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:07:27,919 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 16:07:27,919 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:07:29,228 INFO L124 PetriNetUnfolderBase]: 3894/6302 cut-off events. [2024-06-20 16:07:29,228 INFO L125 PetriNetUnfolderBase]: For 544733/544743 co-relation queries the response was YES. [2024-06-20 16:07:29,282 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54149 conditions, 6302 events. 3894/6302 cut-off events. For 544733/544743 co-relation queries the response was YES. Maximal size of possible extension queue 351. Compared 39613 event pairs, 793 based on Foata normal form. 2/6288 useless extension candidates. Maximal degree in co-relation 54018. Up to 6010 conditions per place. [2024-06-20 16:07:29,308 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 387 selfloop transitions, 26 changer transitions 0/424 dead transitions. [2024-06-20 16:07:29,308 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 294 places, 424 transitions, 6591 flow [2024-06-20 16:07:29,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:07:29,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:07:29,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 148 transitions. [2024-06-20 16:07:29,309 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4010840108401084 [2024-06-20 16:07:29,309 INFO L175 Difference]: Start difference. First operand has 286 places, 411 transitions, 5727 flow. Second operand 9 states and 148 transitions. [2024-06-20 16:07:29,309 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 294 places, 424 transitions, 6591 flow [2024-06-20 16:07:30,751 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 288 places, 424 transitions, 6503 flow, removed 26 selfloop flow, removed 6 redundant places. [2024-06-20 16:07:30,756 INFO L231 Difference]: Finished difference. Result has 289 places, 411 transitions, 5697 flow [2024-06-20 16:07:30,756 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5639, PETRI_DIFFERENCE_MINUEND_PLACES=280, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=411, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=385, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5697, PETRI_PLACES=289, PETRI_TRANSITIONS=411} [2024-06-20 16:07:30,756 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 247 predicate places. [2024-06-20 16:07:30,757 INFO L495 AbstractCegarLoop]: Abstraction has has 289 places, 411 transitions, 5697 flow [2024-06-20 16:07:30,757 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:07:30,757 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:07:30,757 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:07:30,757 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2024-06-20 16:07:30,757 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)] === [2024-06-20 16:07:30,757 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:07:30,758 INFO L85 PathProgramCache]: Analyzing trace with hash 1019824960, now seen corresponding path program 1 times [2024-06-20 16:07:30,758 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:07:30,758 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1667774106] [2024-06-20 16:07:30,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:07:30,758 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:07:30,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:07:31,705 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:07:31,705 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:07:31,705 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1667774106] [2024-06-20 16:07:31,705 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1667774106] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:07:31,705 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:07:31,705 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:07:31,705 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [633117454] [2024-06-20 16:07:31,705 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:07:31,705 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:07:31,705 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:07:31,706 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:07:31,706 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:07:31,800 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-20 16:07:31,801 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 289 places, 411 transitions, 5697 flow. Second operand has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:07:31,801 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:07:31,801 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-20 16:07:31,801 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:07:33,248 INFO L124 PetriNetUnfolderBase]: 4081/6507 cut-off events. [2024-06-20 16:07:33,248 INFO L125 PetriNetUnfolderBase]: For 635237/635239 co-relation queries the response was YES. [2024-06-20 16:07:33,303 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57303 conditions, 6507 events. 4081/6507 cut-off events. For 635237/635239 co-relation queries the response was YES. Maximal size of possible extension queue 350. Compared 39996 event pairs, 868 based on Foata normal form. 2/6508 useless extension candidates. Maximal degree in co-relation 57171. Up to 6314 conditions per place. [2024-06-20 16:07:33,331 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 401 selfloop transitions, 19 changer transitions 0/424 dead transitions. [2024-06-20 16:07:33,331 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 296 places, 424 transitions, 6601 flow [2024-06-20 16:07:33,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:07:33,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:07:33,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 126 transitions. [2024-06-20 16:07:33,332 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38414634146341464 [2024-06-20 16:07:33,332 INFO L175 Difference]: Start difference. First operand has 289 places, 411 transitions, 5697 flow. Second operand 8 states and 126 transitions. [2024-06-20 16:07:33,332 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 296 places, 424 transitions, 6601 flow [2024-06-20 16:07:34,682 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 287 places, 424 transitions, 6496 flow, removed 7 selfloop flow, removed 9 redundant places. [2024-06-20 16:07:34,687 INFO L231 Difference]: Finished difference. Result has 288 places, 413 transitions, 5675 flow [2024-06-20 16:07:34,687 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5592, PETRI_DIFFERENCE_MINUEND_PLACES=280, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=411, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=392, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5675, PETRI_PLACES=288, PETRI_TRANSITIONS=413} [2024-06-20 16:07:34,687 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 246 predicate places. [2024-06-20 16:07:34,687 INFO L495 AbstractCegarLoop]: Abstraction has has 288 places, 413 transitions, 5675 flow [2024-06-20 16:07:34,688 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:07:34,688 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:07:34,688 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:07:34,688 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2024-06-20 16:07:34,688 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)] === [2024-06-20 16:07:34,688 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:07:34,688 INFO L85 PathProgramCache]: Analyzing trace with hash -821070062, now seen corresponding path program 1 times [2024-06-20 16:07:34,688 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:07:34,688 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1808434595] [2024-06-20 16:07:34,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:07:34,688 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:07:34,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:07:35,532 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:07:35,532 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:07:35,532 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1808434595] [2024-06-20 16:07:35,532 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1808434595] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:07:35,532 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:07:35,532 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:07:35,532 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [975795179] [2024-06-20 16:07:35,532 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:07:35,533 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:07:35,533 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:07:35,533 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:07:35,533 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:07:35,594 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-20 16:07:35,594 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 288 places, 413 transitions, 5675 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 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) [2024-06-20 16:07:35,594 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:07:35,594 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-20 16:07:35,594 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:07:36,948 INFO L124 PetriNetUnfolderBase]: 4083/6516 cut-off events. [2024-06-20 16:07:36,948 INFO L125 PetriNetUnfolderBase]: For 644107/644113 co-relation queries the response was YES. [2024-06-20 16:07:37,011 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57444 conditions, 6516 events. 4083/6516 cut-off events. For 644107/644113 co-relation queries the response was YES. Maximal size of possible extension queue 350. Compared 40054 event pairs, 844 based on Foata normal form. 8/6523 useless extension candidates. Maximal degree in co-relation 57311. Up to 6201 conditions per place. [2024-06-20 16:07:37,040 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 385 selfloop transitions, 53 changer transitions 0/442 dead transitions. [2024-06-20 16:07:37,040 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 295 places, 442 transitions, 6850 flow [2024-06-20 16:07:37,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:07:37,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:07:37,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 147 transitions. [2024-06-20 16:07:37,041 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4481707317073171 [2024-06-20 16:07:37,041 INFO L175 Difference]: Start difference. First operand has 288 places, 413 transitions, 5675 flow. Second operand 8 states and 147 transitions. [2024-06-20 16:07:37,041 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 295 places, 442 transitions, 6850 flow [2024-06-20 16:07:38,546 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 289 places, 442 transitions, 6783 flow, removed 16 selfloop flow, removed 6 redundant places. [2024-06-20 16:07:38,551 INFO L231 Difference]: Finished difference. Result has 290 places, 416 transitions, 5768 flow [2024-06-20 16:07:38,551 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5608, PETRI_DIFFERENCE_MINUEND_PLACES=282, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=413, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=362, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5768, PETRI_PLACES=290, PETRI_TRANSITIONS=416} [2024-06-20 16:07:38,552 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 248 predicate places. [2024-06-20 16:07:38,552 INFO L495 AbstractCegarLoop]: Abstraction has has 290 places, 416 transitions, 5768 flow [2024-06-20 16:07:38,552 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 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) [2024-06-20 16:07:38,552 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:07:38,552 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:07:38,552 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2024-06-20 16:07:38,552 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)] === [2024-06-20 16:07:38,553 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:07:38,553 INFO L85 PathProgramCache]: Analyzing trace with hash 1983232064, now seen corresponding path program 2 times [2024-06-20 16:07:38,553 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:07:38,553 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1409901085] [2024-06-20 16:07:38,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:07:38,553 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:07:38,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:07:39,324 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:07:39,324 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:07:39,324 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1409901085] [2024-06-20 16:07:39,325 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1409901085] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:07:39,325 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:07:39,325 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:07:39,325 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [52517327] [2024-06-20 16:07:39,325 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:07:39,325 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:07:39,325 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:07:39,325 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:07:39,325 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:07:39,426 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-20 16:07:39,426 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 290 places, 416 transitions, 5768 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 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) [2024-06-20 16:07:39,426 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:07:39,426 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-20 16:07:39,426 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:07:40,912 INFO L124 PetriNetUnfolderBase]: 4103/6550 cut-off events. [2024-06-20 16:07:40,913 INFO L125 PetriNetUnfolderBase]: For 656724/656730 co-relation queries the response was YES. [2024-06-20 16:07:40,976 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57968 conditions, 6550 events. 4103/6550 cut-off events. For 656724/656730 co-relation queries the response was YES. Maximal size of possible extension queue 350. Compared 40368 event pairs, 844 based on Foata normal form. 7/6556 useless extension candidates. Maximal degree in co-relation 57834. Up to 6267 conditions per place. [2024-06-20 16:07:41,007 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 390 selfloop transitions, 56 changer transitions 0/450 dead transitions. [2024-06-20 16:07:41,008 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 297 places, 450 transitions, 6942 flow [2024-06-20 16:07:41,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:07:41,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:07:41,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 140 transitions. [2024-06-20 16:07:41,009 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4268292682926829 [2024-06-20 16:07:41,009 INFO L175 Difference]: Start difference. First operand has 290 places, 416 transitions, 5768 flow. Second operand 8 states and 140 transitions. [2024-06-20 16:07:41,009 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 297 places, 450 transitions, 6942 flow [2024-06-20 16:07:42,710 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 292 places, 450 transitions, 6821 flow, removed 10 selfloop flow, removed 5 redundant places. [2024-06-20 16:07:42,715 INFO L231 Difference]: Finished difference. Result has 293 places, 428 transitions, 5974 flow [2024-06-20 16:07:42,716 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5664, PETRI_DIFFERENCE_MINUEND_PLACES=285, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=416, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=369, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5974, PETRI_PLACES=293, PETRI_TRANSITIONS=428} [2024-06-20 16:07:42,716 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 251 predicate places. [2024-06-20 16:07:42,716 INFO L495 AbstractCegarLoop]: Abstraction has has 293 places, 428 transitions, 5974 flow [2024-06-20 16:07:42,716 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 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) [2024-06-20 16:07:42,716 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:07:42,716 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:07:42,716 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2024-06-20 16:07:42,717 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)] === [2024-06-20 16:07:42,717 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:07:42,717 INFO L85 PathProgramCache]: Analyzing trace with hash -823929998, now seen corresponding path program 1 times [2024-06-20 16:07:42,718 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:07:42,718 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [815744840] [2024-06-20 16:07:42,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:07:42,718 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:07:42,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:07:43,655 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:07:43,656 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:07:43,656 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [815744840] [2024-06-20 16:07:43,656 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [815744840] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:07:43,656 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:07:43,656 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:07:43,656 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1528055791] [2024-06-20 16:07:43,656 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:07:43,656 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:07:43,656 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:07:43,657 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:07:43,657 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:07:43,740 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-20 16:07:43,740 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 293 places, 428 transitions, 5974 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 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) [2024-06-20 16:07:43,740 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:07:43,740 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-20 16:07:43,740 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:07:45,159 INFO L124 PetriNetUnfolderBase]: 4111/6560 cut-off events. [2024-06-20 16:07:45,159 INFO L125 PetriNetUnfolderBase]: For 674497/674503 co-relation queries the response was YES. [2024-06-20 16:07:45,217 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58223 conditions, 6560 events. 4111/6560 cut-off events. For 674497/674503 co-relation queries the response was YES. Maximal size of possible extension queue 350. Compared 40345 event pairs, 694 based on Foata normal form. 8/6567 useless extension candidates. Maximal degree in co-relation 58088. Up to 6218 conditions per place. [2024-06-20 16:07:45,245 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 398 selfloop transitions, 56 changer transitions 0/458 dead transitions. [2024-06-20 16:07:45,245 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 300 places, 458 transitions, 7191 flow [2024-06-20 16:07:45,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:07:45,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:07:45,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 145 transitions. [2024-06-20 16:07:45,246 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4420731707317073 [2024-06-20 16:07:45,246 INFO L175 Difference]: Start difference. First operand has 293 places, 428 transitions, 5974 flow. Second operand 8 states and 145 transitions. [2024-06-20 16:07:45,246 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 300 places, 458 transitions, 7191 flow [2024-06-20 16:07:46,521 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 295 places, 458 transitions, 7069 flow, removed 11 selfloop flow, removed 5 redundant places. [2024-06-20 16:07:46,526 INFO L231 Difference]: Finished difference. Result has 296 places, 430 transitions, 6015 flow [2024-06-20 16:07:46,526 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5852, PETRI_DIFFERENCE_MINUEND_PLACES=288, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=428, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=374, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6015, PETRI_PLACES=296, PETRI_TRANSITIONS=430} [2024-06-20 16:07:46,526 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 254 predicate places. [2024-06-20 16:07:46,527 INFO L495 AbstractCegarLoop]: Abstraction has has 296 places, 430 transitions, 6015 flow [2024-06-20 16:07:46,527 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 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) [2024-06-20 16:07:46,527 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:07:46,527 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:07:46,527 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2024-06-20 16:07:46,527 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)] === [2024-06-20 16:07:46,527 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:07:46,527 INFO L85 PathProgramCache]: Analyzing trace with hash -815359118, now seen corresponding path program 2 times [2024-06-20 16:07:46,528 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:07:46,528 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [84757921] [2024-06-20 16:07:46,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:07:46,528 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:07:46,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:07:47,567 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:07:47,568 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:07:47,568 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [84757921] [2024-06-20 16:07:47,568 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [84757921] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:07:47,568 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:07:47,568 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:07:47,568 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1898983233] [2024-06-20 16:07:47,568 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:07:47,568 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:07:47,568 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:07:47,569 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:07:47,569 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:07:47,654 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-20 16:07:47,654 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 296 places, 430 transitions, 6015 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 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) [2024-06-20 16:07:47,654 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:07:47,654 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-20 16:07:47,654 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:07:49,120 INFO L124 PetriNetUnfolderBase]: 4119/6568 cut-off events. [2024-06-20 16:07:49,120 INFO L125 PetriNetUnfolderBase]: For 689016/689020 co-relation queries the response was YES. [2024-06-20 16:07:49,181 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58526 conditions, 6568 events. 4119/6568 cut-off events. For 689016/689020 co-relation queries the response was YES. Maximal size of possible extension queue 351. Compared 40379 event pairs, 842 based on Foata normal form. 6/6573 useless extension candidates. Maximal degree in co-relation 58390. Up to 6290 conditions per place. [2024-06-20 16:07:49,208 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 394 selfloop transitions, 55 changer transitions 0/453 dead transitions. [2024-06-20 16:07:49,208 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 304 places, 453 transitions, 7057 flow [2024-06-20 16:07:49,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:07:49,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:07:49,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 150 transitions. [2024-06-20 16:07:49,209 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4065040650406504 [2024-06-20 16:07:49,209 INFO L175 Difference]: Start difference. First operand has 296 places, 430 transitions, 6015 flow. Second operand 9 states and 150 transitions. [2024-06-20 16:07:49,210 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 304 places, 453 transitions, 7057 flow [2024-06-20 16:07:50,720 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 297 places, 453 transitions, 6887 flow, removed 16 selfloop flow, removed 7 redundant places. [2024-06-20 16:07:50,725 INFO L231 Difference]: Finished difference. Result has 299 places, 434 transitions, 6059 flow [2024-06-20 16:07:50,725 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5857, PETRI_DIFFERENCE_MINUEND_PLACES=289, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=430, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=375, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6059, PETRI_PLACES=299, PETRI_TRANSITIONS=434} [2024-06-20 16:07:50,726 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 257 predicate places. [2024-06-20 16:07:50,726 INFO L495 AbstractCegarLoop]: Abstraction has has 299 places, 434 transitions, 6059 flow [2024-06-20 16:07:50,726 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 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) [2024-06-20 16:07:50,726 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:07:50,726 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:07:50,726 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2024-06-20 16:07:50,726 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)] === [2024-06-20 16:07:50,726 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:07:50,726 INFO L85 PathProgramCache]: Analyzing trace with hash -705479990, now seen corresponding path program 1 times [2024-06-20 16:07:50,726 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:07:50,727 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [16278318] [2024-06-20 16:07:50,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:07:50,727 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:07:50,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:07:51,397 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:07:51,398 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:07:51,398 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [16278318] [2024-06-20 16:07:51,398 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [16278318] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:07:51,398 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:07:51,398 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:07:51,398 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1508370924] [2024-06-20 16:07:51,398 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:07:51,398 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:07:51,398 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:07:51,398 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:07:51,398 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:07:51,459 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-20 16:07:51,459 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 299 places, 434 transitions, 6059 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 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) [2024-06-20 16:07:51,459 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:07:51,460 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-20 16:07:51,460 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:07:52,894 INFO L124 PetriNetUnfolderBase]: 4171/6646 cut-off events. [2024-06-20 16:07:52,894 INFO L125 PetriNetUnfolderBase]: For 726616/726622 co-relation queries the response was YES. [2024-06-20 16:07:52,957 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59623 conditions, 6646 events. 4171/6646 cut-off events. For 726616/726622 co-relation queries the response was YES. Maximal size of possible extension queue 359. Compared 40923 event pairs, 836 based on Foata normal form. 10/6655 useless extension candidates. Maximal degree in co-relation 59485. Up to 6236 conditions per place. [2024-06-20 16:07:52,986 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 413 selfloop transitions, 60 changer transitions 0/477 dead transitions. [2024-06-20 16:07:52,986 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 306 places, 477 transitions, 7588 flow [2024-06-20 16:07:52,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:07:52,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:07:52,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 147 transitions. [2024-06-20 16:07:52,993 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4481707317073171 [2024-06-20 16:07:52,993 INFO L175 Difference]: Start difference. First operand has 299 places, 434 transitions, 6059 flow. Second operand 8 states and 147 transitions. [2024-06-20 16:07:52,993 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 306 places, 477 transitions, 7588 flow [2024-06-20 16:07:54,946 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 302 places, 477 transitions, 7487 flow, removed 16 selfloop flow, removed 4 redundant places. [2024-06-20 16:07:54,952 INFO L231 Difference]: Finished difference. Result has 304 places, 452 transitions, 6402 flow [2024-06-20 16:07:54,952 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5960, PETRI_DIFFERENCE_MINUEND_PLACES=295, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=434, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=377, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6402, PETRI_PLACES=304, PETRI_TRANSITIONS=452} [2024-06-20 16:07:54,952 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 262 predicate places. [2024-06-20 16:07:54,952 INFO L495 AbstractCegarLoop]: Abstraction has has 304 places, 452 transitions, 6402 flow [2024-06-20 16:07:54,953 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 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) [2024-06-20 16:07:54,953 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:07:54,953 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:07:54,953 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2024-06-20 16:07:54,953 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)] === [2024-06-20 16:07:54,953 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:07:54,953 INFO L85 PathProgramCache]: Analyzing trace with hash -528111320, now seen corresponding path program 2 times [2024-06-20 16:07:54,953 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:07:54,953 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [611376376] [2024-06-20 16:07:54,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:07:54,953 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:07:54,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:07:55,581 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:07:55,581 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:07:55,581 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [611376376] [2024-06-20 16:07:55,581 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [611376376] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:07:55,581 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:07:55,581 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:07:55,581 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1446276385] [2024-06-20 16:07:55,581 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:07:55,581 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:07:55,582 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:07:55,582 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:07:55,582 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:07:55,657 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-20 16:07:55,658 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 304 places, 452 transitions, 6402 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 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) [2024-06-20 16:07:55,658 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:07:55,658 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-20 16:07:55,658 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:07:57,130 INFO L124 PetriNetUnfolderBase]: 4181/6662 cut-off events. [2024-06-20 16:07:57,130 INFO L125 PetriNetUnfolderBase]: For 739797/739803 co-relation queries the response was YES. [2024-06-20 16:07:57,194 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60745 conditions, 6662 events. 4181/6662 cut-off events. For 739797/739803 co-relation queries the response was YES. Maximal size of possible extension queue 361. Compared 41061 event pairs, 835 based on Foata normal form. 8/6669 useless extension candidates. Maximal degree in co-relation 60605. Up to 6408 conditions per place. [2024-06-20 16:07:57,221 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 427 selfloop transitions, 43 changer transitions 0/474 dead transitions. [2024-06-20 16:07:57,221 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 311 places, 474 transitions, 7522 flow [2024-06-20 16:07:57,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:07:57,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:07:57,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 136 transitions. [2024-06-20 16:07:57,222 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4146341463414634 [2024-06-20 16:07:57,222 INFO L175 Difference]: Start difference. First operand has 304 places, 452 transitions, 6402 flow. Second operand 8 states and 136 transitions. [2024-06-20 16:07:57,222 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 311 places, 474 transitions, 7522 flow [2024-06-20 16:07:59,189 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 308 places, 474 transitions, 7371 flow, removed 64 selfloop flow, removed 3 redundant places. [2024-06-20 16:07:59,195 INFO L231 Difference]: Finished difference. Result has 309 places, 456 transitions, 6448 flow [2024-06-20 16:07:59,195 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6269, PETRI_DIFFERENCE_MINUEND_PLACES=301, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=452, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=410, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6448, PETRI_PLACES=309, PETRI_TRANSITIONS=456} [2024-06-20 16:07:59,196 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 267 predicate places. [2024-06-20 16:07:59,196 INFO L495 AbstractCegarLoop]: Abstraction has has 309 places, 456 transitions, 6448 flow [2024-06-20 16:07:59,196 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 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) [2024-06-20 16:07:59,196 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:07:59,196 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:07:59,196 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2024-06-20 16:07:59,196 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)] === [2024-06-20 16:07:59,197 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:07:59,197 INFO L85 PathProgramCache]: Analyzing trace with hash -528468812, now seen corresponding path program 3 times [2024-06-20 16:07:59,197 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:07:59,197 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [833296191] [2024-06-20 16:07:59,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:07:59,197 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:07:59,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:08:00,013 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:08:00,013 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:08:00,013 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [833296191] [2024-06-20 16:08:00,013 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [833296191] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:08:00,013 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:08:00,013 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:08:00,013 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [937292881] [2024-06-20 16:08:00,013 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:08:00,014 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:08:00,014 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:08:00,014 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:08:00,014 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:08:00,091 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-20 16:08:00,092 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 309 places, 456 transitions, 6448 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 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) [2024-06-20 16:08:00,092 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:08:00,092 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-20 16:08:00,092 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:08:01,540 INFO L124 PetriNetUnfolderBase]: 4186/6661 cut-off events. [2024-06-20 16:08:01,541 INFO L125 PetriNetUnfolderBase]: For 752956/752958 co-relation queries the response was YES. [2024-06-20 16:08:01,604 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60907 conditions, 6661 events. 4186/6661 cut-off events. For 752956/752958 co-relation queries the response was YES. Maximal size of possible extension queue 360. Compared 40933 event pairs, 839 based on Foata normal form. 1/6661 useless extension candidates. Maximal degree in co-relation 60765. Up to 6384 conditions per place. [2024-06-20 16:08:01,631 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 412 selfloop transitions, 58 changer transitions 0/474 dead transitions. [2024-06-20 16:08:01,632 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 316 places, 474 transitions, 7484 flow [2024-06-20 16:08:01,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:08:01,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:08:01,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 135 transitions. [2024-06-20 16:08:01,633 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4115853658536585 [2024-06-20 16:08:01,633 INFO L175 Difference]: Start difference. First operand has 309 places, 456 transitions, 6448 flow. Second operand 8 states and 135 transitions. [2024-06-20 16:08:01,633 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 316 places, 474 transitions, 7484 flow [2024-06-20 16:08:03,543 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 311 places, 474 transitions, 7327 flow, removed 39 selfloop flow, removed 5 redundant places. [2024-06-20 16:08:03,549 INFO L231 Difference]: Finished difference. Result has 312 places, 459 transitions, 6475 flow [2024-06-20 16:08:03,549 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6291, PETRI_DIFFERENCE_MINUEND_PLACES=304, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=456, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=398, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6475, PETRI_PLACES=312, PETRI_TRANSITIONS=459} [2024-06-20 16:08:03,549 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 270 predicate places. [2024-06-20 16:08:03,549 INFO L495 AbstractCegarLoop]: Abstraction has has 312 places, 459 transitions, 6475 flow [2024-06-20 16:08:03,549 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 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) [2024-06-20 16:08:03,549 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:08:03,549 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:08:03,549 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2024-06-20 16:08:03,549 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)] === [2024-06-20 16:08:03,550 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:08:03,550 INFO L85 PathProgramCache]: Analyzing trace with hash -1772142196, now seen corresponding path program 3 times [2024-06-20 16:08:03,550 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:08:03,550 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [12421926] [2024-06-20 16:08:03,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:08:03,550 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:08:03,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:08:04,188 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:08:04,188 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:08:04,188 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [12421926] [2024-06-20 16:08:04,188 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [12421926] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:08:04,188 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:08:04,188 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:08:04,188 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [529049128] [2024-06-20 16:08:04,188 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:08:04,189 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:08:04,189 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:08:04,189 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:08:04,189 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:08:04,264 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-20 16:08:04,265 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 312 places, 459 transitions, 6475 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 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) [2024-06-20 16:08:04,265 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:08:04,265 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-20 16:08:04,265 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:08:05,679 INFO L124 PetriNetUnfolderBase]: 4196/6689 cut-off events. [2024-06-20 16:08:05,679 INFO L125 PetriNetUnfolderBase]: For 771387/771393 co-relation queries the response was YES. [2024-06-20 16:08:05,742 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61180 conditions, 6689 events. 4196/6689 cut-off events. For 771387/771393 co-relation queries the response was YES. Maximal size of possible extension queue 365. Compared 41245 event pairs, 834 based on Foata normal form. 8/6696 useless extension candidates. Maximal degree in co-relation 61037. Up to 6411 conditions per place. [2024-06-20 16:08:05,769 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 430 selfloop transitions, 48 changer transitions 0/482 dead transitions. [2024-06-20 16:08:05,769 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 319 places, 482 transitions, 7617 flow [2024-06-20 16:08:05,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:08:05,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:08:05,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 139 transitions. [2024-06-20 16:08:05,770 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42378048780487804 [2024-06-20 16:08:05,770 INFO L175 Difference]: Start difference. First operand has 312 places, 459 transitions, 6475 flow. Second operand 8 states and 139 transitions. [2024-06-20 16:08:05,770 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 319 places, 482 transitions, 7617 flow [2024-06-20 16:08:07,665 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 313 places, 482 transitions, 7457 flow, removed 17 selfloop flow, removed 6 redundant places. [2024-06-20 16:08:07,670 INFO L231 Difference]: Finished difference. Result has 314 places, 462 transitions, 6500 flow [2024-06-20 16:08:07,671 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6315, PETRI_DIFFERENCE_MINUEND_PLACES=306, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=459, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=411, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6500, PETRI_PLACES=314, PETRI_TRANSITIONS=462} [2024-06-20 16:08:07,671 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 272 predicate places. [2024-06-20 16:08:07,671 INFO L495 AbstractCegarLoop]: Abstraction has has 314 places, 462 transitions, 6500 flow [2024-06-20 16:08:07,671 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 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) [2024-06-20 16:08:07,671 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:08:07,672 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:08:07,672 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2024-06-20 16:08:07,672 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)] === [2024-06-20 16:08:07,672 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:08:07,672 INFO L85 PathProgramCache]: Analyzing trace with hash -1772265514, now seen corresponding path program 3 times [2024-06-20 16:08:07,672 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:08:07,672 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [485733356] [2024-06-20 16:08:07,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:08:07,673 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:08:07,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:08:08,527 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:08:08,528 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:08:08,528 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [485733356] [2024-06-20 16:08:08,528 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [485733356] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:08:08,528 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:08:08,528 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:08:08,528 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [788681880] [2024-06-20 16:08:08,528 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:08:08,528 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:08:08,528 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:08:08,529 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:08:08,529 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:08:08,598 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-20 16:08:08,598 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 314 places, 462 transitions, 6500 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 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) [2024-06-20 16:08:08,598 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:08:08,598 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-20 16:08:08,598 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:08:10,098 INFO L124 PetriNetUnfolderBase]: 4204/6689 cut-off events. [2024-06-20 16:08:10,099 INFO L125 PetriNetUnfolderBase]: For 787928/787930 co-relation queries the response was YES. [2024-06-20 16:08:10,162 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61506 conditions, 6689 events. 4204/6689 cut-off events. For 787928/787930 co-relation queries the response was YES. Maximal size of possible extension queue 363. Compared 41113 event pairs, 842 based on Foata normal form. 2/6690 useless extension candidates. Maximal degree in co-relation 61362. Up to 6407 conditions per place. [2024-06-20 16:08:10,190 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 419 selfloop transitions, 57 changer transitions 0/480 dead transitions. [2024-06-20 16:08:10,190 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 321 places, 480 transitions, 7544 flow [2024-06-20 16:08:10,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:08:10,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:08:10,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 135 transitions. [2024-06-20 16:08:10,191 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4115853658536585 [2024-06-20 16:08:10,191 INFO L175 Difference]: Start difference. First operand has 314 places, 462 transitions, 6500 flow. Second operand 8 states and 135 transitions. [2024-06-20 16:08:10,191 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 321 places, 480 transitions, 7544 flow [2024-06-20 16:08:12,397 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 315 places, 480 transitions, 7389 flow, removed 32 selfloop flow, removed 6 redundant places. [2024-06-20 16:08:12,403 INFO L231 Difference]: Finished difference. Result has 316 places, 464 transitions, 6518 flow [2024-06-20 16:08:12,403 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6345, PETRI_DIFFERENCE_MINUEND_PLACES=308, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=462, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=405, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6518, PETRI_PLACES=316, PETRI_TRANSITIONS=464} [2024-06-20 16:08:12,403 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 274 predicate places. [2024-06-20 16:08:12,403 INFO L495 AbstractCegarLoop]: Abstraction has has 316 places, 464 transitions, 6518 flow [2024-06-20 16:08:12,403 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 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) [2024-06-20 16:08:12,403 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:08:12,403 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:08:12,403 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2024-06-20 16:08:12,403 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)] === [2024-06-20 16:08:12,404 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:08:12,404 INFO L85 PathProgramCache]: Analyzing trace with hash -1120734880, now seen corresponding path program 4 times [2024-06-20 16:08:12,404 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:08:12,404 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [621305537] [2024-06-20 16:08:12,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:08:12,404 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:08:12,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:08:13,081 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:08:13,081 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:08:13,081 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [621305537] [2024-06-20 16:08:13,081 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [621305537] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:08:13,081 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:08:13,081 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:08:13,081 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1642628006] [2024-06-20 16:08:13,081 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:08:13,082 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:08:13,082 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:08:13,082 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:08:13,082 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:08:13,150 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-20 16:08:13,150 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 316 places, 464 transitions, 6518 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 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) [2024-06-20 16:08:13,150 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:08:13,150 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-20 16:08:13,150 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:08:14,519 INFO L124 PetriNetUnfolderBase]: 4240/6750 cut-off events. [2024-06-20 16:08:14,519 INFO L125 PetriNetUnfolderBase]: For 821695/821703 co-relation queries the response was YES. [2024-06-20 16:08:14,585 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62333 conditions, 6750 events. 4240/6750 cut-off events. For 821695/821703 co-relation queries the response was YES. Maximal size of possible extension queue 370. Compared 41626 event pairs, 840 based on Foata normal form. 12/6761 useless extension candidates. Maximal degree in co-relation 62188. Up to 6057 conditions per place. [2024-06-20 16:08:14,613 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 405 selfloop transitions, 104 changer transitions 0/513 dead transitions. [2024-06-20 16:08:14,613 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 323 places, 513 transitions, 8366 flow [2024-06-20 16:08:14,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:08:14,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:08:14,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 149 transitions. [2024-06-20 16:08:14,614 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45426829268292684 [2024-06-20 16:08:14,614 INFO L175 Difference]: Start difference. First operand has 316 places, 464 transitions, 6518 flow. Second operand 8 states and 149 transitions. [2024-06-20 16:08:14,614 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 323 places, 513 transitions, 8366 flow [2024-06-20 16:08:16,256 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 317 places, 513 transitions, 8221 flow, removed 18 selfloop flow, removed 6 redundant places. [2024-06-20 16:08:16,262 INFO L231 Difference]: Finished difference. Result has 319 places, 484 transitions, 6908 flow [2024-06-20 16:08:16,262 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6373, PETRI_DIFFERENCE_MINUEND_PLACES=310, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=464, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=87, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=364, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6908, PETRI_PLACES=319, PETRI_TRANSITIONS=484} [2024-06-20 16:08:16,262 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 277 predicate places. [2024-06-20 16:08:16,262 INFO L495 AbstractCegarLoop]: Abstraction has has 319 places, 484 transitions, 6908 flow [2024-06-20 16:08:16,263 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 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) [2024-06-20 16:08:16,263 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:08:16,263 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:08:16,263 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2024-06-20 16:08:16,263 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)] === [2024-06-20 16:08:16,263 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:08:16,263 INFO L85 PathProgramCache]: Analyzing trace with hash -1926518070, now seen corresponding path program 5 times [2024-06-20 16:08:16,263 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:08:16,263 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [400558664] [2024-06-20 16:08:16,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:08:16,263 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:08:16,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:08:16,966 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:08:16,967 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:08:16,967 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [400558664] [2024-06-20 16:08:16,967 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [400558664] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:08:16,967 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:08:16,967 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:08:16,967 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1021842726] [2024-06-20 16:08:16,967 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:08:16,967 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:08:16,967 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:08:16,968 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:08:16,968 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:08:17,030 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-20 16:08:17,030 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 319 places, 484 transitions, 6908 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 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) [2024-06-20 16:08:17,030 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:08:17,031 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-20 16:08:17,031 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:08:18,476 INFO L124 PetriNetUnfolderBase]: 4292/6824 cut-off events. [2024-06-20 16:08:18,476 INFO L125 PetriNetUnfolderBase]: For 860660/860668 co-relation queries the response was YES. [2024-06-20 16:08:18,540 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64580 conditions, 6824 events. 4292/6824 cut-off events. For 860660/860668 co-relation queries the response was YES. Maximal size of possible extension queue 377. Compared 42104 event pairs, 843 based on Foata normal form. 12/6835 useless extension candidates. Maximal degree in co-relation 64433. Up to 6097 conditions per place. [2024-06-20 16:08:18,567 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 399 selfloop transitions, 118 changer transitions 0/521 dead transitions. [2024-06-20 16:08:18,567 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 326 places, 521 transitions, 8763 flow [2024-06-20 16:08:18,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:08:18,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:08:18,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 147 transitions. [2024-06-20 16:08:18,568 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4481707317073171 [2024-06-20 16:08:18,568 INFO L175 Difference]: Start difference. First operand has 319 places, 484 transitions, 6908 flow. Second operand 8 states and 147 transitions. [2024-06-20 16:08:18,568 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 326 places, 521 transitions, 8763 flow [2024-06-20 16:08:20,900 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 323 places, 521 transitions, 8530 flow, removed 94 selfloop flow, removed 3 redundant places. [2024-06-20 16:08:20,906 INFO L231 Difference]: Finished difference. Result has 326 places, 494 transitions, 7216 flow [2024-06-20 16:08:20,907 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6733, PETRI_DIFFERENCE_MINUEND_PLACES=316, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=484, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=108, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=374, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7216, PETRI_PLACES=326, PETRI_TRANSITIONS=494} [2024-06-20 16:08:20,907 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 284 predicate places. [2024-06-20 16:08:20,907 INFO L495 AbstractCegarLoop]: Abstraction has has 326 places, 494 transitions, 7216 flow [2024-06-20 16:08:20,907 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 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) [2024-06-20 16:08:20,907 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:08:20,907 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:08:20,907 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2024-06-20 16:08:20,907 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)] === [2024-06-20 16:08:20,908 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:08:20,908 INFO L85 PathProgramCache]: Analyzing trace with hash -1926102360, now seen corresponding path program 6 times [2024-06-20 16:08:20,908 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:08:20,908 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [193328895] [2024-06-20 16:08:20,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:08:20,908 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:08:20,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:08:21,591 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:08:21,591 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:08:21,591 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [193328895] [2024-06-20 16:08:21,591 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [193328895] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:08:21,591 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:08:21,591 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:08:21,591 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [893600754] [2024-06-20 16:08:21,592 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:08:21,592 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:08:21,592 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:08:21,592 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:08:21,592 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:08:21,650 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-20 16:08:21,650 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 326 places, 494 transitions, 7216 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 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) [2024-06-20 16:08:21,650 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:08:21,650 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-20 16:08:21,650 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:08:23,092 INFO L124 PetriNetUnfolderBase]: 4280/6808 cut-off events. [2024-06-20 16:08:23,093 INFO L125 PetriNetUnfolderBase]: For 858704/858712 co-relation queries the response was YES. [2024-06-20 16:08:23,159 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64136 conditions, 6808 events. 4280/6808 cut-off events. For 858704/858712 co-relation queries the response was YES. Maximal size of possible extension queue 376. Compared 41971 event pairs, 837 based on Foata normal form. 12/6819 useless extension candidates. Maximal degree in co-relation 63985. Up to 6089 conditions per place. [2024-06-20 16:08:23,188 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 392 selfloop transitions, 122 changer transitions 0/518 dead transitions. [2024-06-20 16:08:23,188 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 333 places, 518 transitions, 8621 flow [2024-06-20 16:08:23,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:08:23,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:08:23,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 145 transitions. [2024-06-20 16:08:23,189 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4420731707317073 [2024-06-20 16:08:23,189 INFO L175 Difference]: Start difference. First operand has 326 places, 494 transitions, 7216 flow. Second operand 8 states and 145 transitions. [2024-06-20 16:08:23,189 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 333 places, 518 transitions, 8621 flow [2024-06-20 16:08:24,991 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 330 places, 518 transitions, 8392 flow, removed 63 selfloop flow, removed 3 redundant places. [2024-06-20 16:08:24,998 INFO L231 Difference]: Finished difference. Result has 331 places, 494 transitions, 7238 flow [2024-06-20 16:08:24,998 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6987, PETRI_DIFFERENCE_MINUEND_PLACES=323, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=494, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=122, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=372, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7238, PETRI_PLACES=331, PETRI_TRANSITIONS=494} [2024-06-20 16:08:24,998 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 289 predicate places. [2024-06-20 16:08:24,998 INFO L495 AbstractCegarLoop]: Abstraction has has 331 places, 494 transitions, 7238 flow [2024-06-20 16:08:24,998 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 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) [2024-06-20 16:08:24,998 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:08:24,998 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:08:24,998 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2024-06-20 16:08:24,998 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)] === [2024-06-20 16:08:24,999 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:08:24,999 INFO L85 PathProgramCache]: Analyzing trace with hash 612165284, now seen corresponding path program 7 times [2024-06-20 16:08:24,999 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:08:24,999 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1589271395] [2024-06-20 16:08:24,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:08:24,999 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:08:25,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:08:25,639 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:08:25,640 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:08:25,640 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1589271395] [2024-06-20 16:08:25,640 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1589271395] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:08:25,640 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:08:25,640 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:08:25,640 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1936201966] [2024-06-20 16:08:25,640 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:08:25,640 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:08:25,640 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:08:25,640 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:08:25,641 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:08:25,704 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-20 16:08:25,704 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 331 places, 494 transitions, 7238 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 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) [2024-06-20 16:08:25,704 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:08:25,704 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-20 16:08:25,704 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:08:27,204 INFO L124 PetriNetUnfolderBase]: 4306/6850 cut-off events. [2024-06-20 16:08:27,204 INFO L125 PetriNetUnfolderBase]: For 876905/876913 co-relation queries the response was YES. [2024-06-20 16:08:27,273 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64871 conditions, 6850 events. 4306/6850 cut-off events. For 876905/876913 co-relation queries the response was YES. Maximal size of possible extension queue 382. Compared 42340 event pairs, 832 based on Foata normal form. 10/6859 useless extension candidates. Maximal degree in co-relation 64719. Up to 6563 conditions per place. [2024-06-20 16:08:27,300 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 462 selfloop transitions, 51 changer transitions 0/517 dead transitions. [2024-06-20 16:08:27,300 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 338 places, 517 transitions, 8737 flow [2024-06-20 16:08:27,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:08:27,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:08:27,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 132 transitions. [2024-06-20 16:08:27,301 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4024390243902439 [2024-06-20 16:08:27,301 INFO L175 Difference]: Start difference. First operand has 331 places, 494 transitions, 7238 flow. Second operand 8 states and 132 transitions. [2024-06-20 16:08:27,301 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 338 places, 517 transitions, 8737 flow [2024-06-20 16:08:29,553 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 332 places, 517 transitions, 8488 flow, removed 5 selfloop flow, removed 6 redundant places. [2024-06-20 16:08:29,560 INFO L231 Difference]: Finished difference. Result has 334 places, 502 transitions, 7326 flow [2024-06-20 16:08:29,560 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6999, PETRI_DIFFERENCE_MINUEND_PLACES=325, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=494, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=444, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7326, PETRI_PLACES=334, PETRI_TRANSITIONS=502} [2024-06-20 16:08:29,561 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 292 predicate places. [2024-06-20 16:08:29,561 INFO L495 AbstractCegarLoop]: Abstraction has has 334 places, 502 transitions, 7326 flow [2024-06-20 16:08:29,561 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 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) [2024-06-20 16:08:29,561 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:08:29,561 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:08:29,561 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2024-06-20 16:08:29,561 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)] === [2024-06-20 16:08:29,561 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:08:29,561 INFO L85 PathProgramCache]: Analyzing trace with hash -934995078, now seen corresponding path program 8 times [2024-06-20 16:08:29,562 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:08:29,562 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [911145513] [2024-06-20 16:08:29,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:08:29,562 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:08:29,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:08:30,231 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:08:30,232 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:08:30,232 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [911145513] [2024-06-20 16:08:30,232 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [911145513] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:08:30,232 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:08:30,232 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:08:30,232 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1616074503] [2024-06-20 16:08:30,232 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:08:30,232 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:08:30,232 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:08:30,233 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:08:30,233 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:08:30,310 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-20 16:08:30,311 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 334 places, 502 transitions, 7326 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 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) [2024-06-20 16:08:30,311 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:08:30,311 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-20 16:08:30,311 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:08:31,772 INFO L124 PetriNetUnfolderBase]: 4316/6868 cut-off events. [2024-06-20 16:08:31,772 INFO L125 PetriNetUnfolderBase]: For 895263/895271 co-relation queries the response was YES. [2024-06-20 16:08:31,840 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65064 conditions, 6868 events. 4316/6868 cut-off events. For 895263/895271 co-relation queries the response was YES. Maximal size of possible extension queue 385. Compared 42474 event pairs, 832 based on Foata normal form. 10/6877 useless extension candidates. Maximal degree in co-relation 64910. Up to 6513 conditions per place. [2024-06-20 16:08:31,869 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 454 selfloop transitions, 74 changer transitions 0/532 dead transitions. [2024-06-20 16:08:31,869 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 341 places, 532 transitions, 9173 flow [2024-06-20 16:08:31,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:08:31,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:08:31,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 136 transitions. [2024-06-20 16:08:31,870 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4146341463414634 [2024-06-20 16:08:31,870 INFO L175 Difference]: Start difference. First operand has 334 places, 502 transitions, 7326 flow. Second operand 8 states and 136 transitions. [2024-06-20 16:08:31,870 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 341 places, 532 transitions, 9173 flow [2024-06-20 16:08:34,354 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 338 places, 532 transitions, 9049 flow, removed 47 selfloop flow, removed 3 redundant places. [2024-06-20 16:08:34,360 INFO L231 Difference]: Finished difference. Result has 340 places, 513 transitions, 7698 flow [2024-06-20 16:08:34,360 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7202, PETRI_DIFFERENCE_MINUEND_PLACES=331, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=502, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=432, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7698, PETRI_PLACES=340, PETRI_TRANSITIONS=513} [2024-06-20 16:08:34,361 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 298 predicate places. [2024-06-20 16:08:34,361 INFO L495 AbstractCegarLoop]: Abstraction has has 340 places, 513 transitions, 7698 flow [2024-06-20 16:08:34,361 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 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) [2024-06-20 16:08:34,361 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:08:34,361 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:08:34,361 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2024-06-20 16:08:34,361 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)] === [2024-06-20 16:08:34,361 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:08:34,361 INFO L85 PathProgramCache]: Analyzing trace with hash -934579368, now seen corresponding path program 9 times [2024-06-20 16:08:34,361 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:08:34,361 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [731598475] [2024-06-20 16:08:34,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:08:34,362 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:08:34,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:08:35,042 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:08:35,042 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:08:35,042 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [731598475] [2024-06-20 16:08:35,042 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [731598475] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:08:35,042 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:08:35,042 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:08:35,042 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1736684497] [2024-06-20 16:08:35,042 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:08:35,042 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:08:35,042 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:08:35,043 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:08:35,043 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:08:35,117 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-20 16:08:35,118 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 340 places, 513 transitions, 7698 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 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) [2024-06-20 16:08:35,118 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:08:35,118 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-20 16:08:35,118 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:08:36,634 INFO L124 PetriNetUnfolderBase]: 4310/6858 cut-off events. [2024-06-20 16:08:36,635 INFO L125 PetriNetUnfolderBase]: For 903567/903575 co-relation queries the response was YES. [2024-06-20 16:08:36,708 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65178 conditions, 6858 events. 4310/6858 cut-off events. For 903567/903575 co-relation queries the response was YES. Maximal size of possible extension queue 383. Compared 42396 event pairs, 829 based on Foata normal form. 10/6867 useless extension candidates. Maximal degree in co-relation 65021. Up to 6508 conditions per place. [2024-06-20 16:08:36,740 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 451 selfloop transitions, 77 changer transitions 0/532 dead transitions. [2024-06-20 16:08:36,740 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 347 places, 532 transitions, 9259 flow [2024-06-20 16:08:36,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:08:36,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:08:36,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 136 transitions. [2024-06-20 16:08:36,741 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4146341463414634 [2024-06-20 16:08:36,741 INFO L175 Difference]: Start difference. First operand has 340 places, 513 transitions, 7698 flow. Second operand 8 states and 136 transitions. [2024-06-20 16:08:36,741 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 347 places, 532 transitions, 9259 flow [2024-06-20 16:08:39,718 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 344 places, 532 transitions, 9070 flow, removed 75 selfloop flow, removed 3 redundant places. [2024-06-20 16:08:39,724 INFO L231 Difference]: Finished difference. Result has 345 places, 513 transitions, 7669 flow [2024-06-20 16:08:39,725 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7509, PETRI_DIFFERENCE_MINUEND_PLACES=337, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=513, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=77, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=436, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7669, PETRI_PLACES=345, PETRI_TRANSITIONS=513} [2024-06-20 16:08:39,725 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 303 predicate places. [2024-06-20 16:08:39,725 INFO L495 AbstractCegarLoop]: Abstraction has has 345 places, 513 transitions, 7669 flow [2024-06-20 16:08:39,725 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 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) [2024-06-20 16:08:39,725 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:08:39,725 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:08:39,725 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2024-06-20 16:08:39,725 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)] === [2024-06-20 16:08:39,725 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:08:39,726 INFO L85 PathProgramCache]: Analyzing trace with hash 1015751046, now seen corresponding path program 10 times [2024-06-20 16:08:39,726 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:08:39,726 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [163670346] [2024-06-20 16:08:39,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:08:39,726 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:08:39,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:08:40,358 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:08:40,358 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:08:40,358 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [163670346] [2024-06-20 16:08:40,358 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [163670346] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:08:40,358 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:08:40,358 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:08:40,358 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [791448324] [2024-06-20 16:08:40,359 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:08:40,359 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:08:40,359 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:08:40,359 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:08:40,359 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:08:40,427 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-20 16:08:40,427 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 345 places, 513 transitions, 7669 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 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) [2024-06-20 16:08:40,428 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:08:40,428 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-20 16:08:40,428 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:08:41,990 INFO L124 PetriNetUnfolderBase]: 4320/6876 cut-off events. [2024-06-20 16:08:41,990 INFO L125 PetriNetUnfolderBase]: For 916702/916710 co-relation queries the response was YES. [2024-06-20 16:08:42,063 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65455 conditions, 6876 events. 4320/6876 cut-off events. For 916702/916710 co-relation queries the response was YES. Maximal size of possible extension queue 386. Compared 42582 event pairs, 827 based on Foata normal form. 10/6885 useless extension candidates. Maximal degree in co-relation 65296. Up to 6607 conditions per place. [2024-06-20 16:08:42,093 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 482 selfloop transitions, 44 changer transitions 0/530 dead transitions. [2024-06-20 16:08:42,093 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 352 places, 530 transitions, 8899 flow [2024-06-20 16:08:42,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:08:42,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:08:42,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 129 transitions. [2024-06-20 16:08:42,094 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3932926829268293 [2024-06-20 16:08:42,094 INFO L175 Difference]: Start difference. First operand has 345 places, 513 transitions, 7669 flow. Second operand 8 states and 129 transitions. [2024-06-20 16:08:42,094 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 352 places, 530 transitions, 8899 flow [2024-06-20 16:08:45,685 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 345 places, 530 transitions, 8680 flow, removed 14 selfloop flow, removed 7 redundant places. [2024-06-20 16:08:45,701 INFO L231 Difference]: Finished difference. Result has 346 places, 517 transitions, 7661 flow [2024-06-20 16:08:45,701 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7462, PETRI_DIFFERENCE_MINUEND_PLACES=338, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=513, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=470, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7661, PETRI_PLACES=346, PETRI_TRANSITIONS=517} [2024-06-20 16:08:45,702 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 304 predicate places. [2024-06-20 16:08:45,702 INFO L495 AbstractCegarLoop]: Abstraction has has 346 places, 517 transitions, 7661 flow [2024-06-20 16:08:45,702 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 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) [2024-06-20 16:08:45,702 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:08:45,702 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:08:45,702 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97 [2024-06-20 16:08:45,702 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)] === [2024-06-20 16:08:45,703 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:08:45,703 INFO L85 PathProgramCache]: Analyzing trace with hash 1135759662, now seen corresponding path program 11 times [2024-06-20 16:08:45,703 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:08:45,703 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1371339125] [2024-06-20 16:08:45,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:08:45,703 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:08:45,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:08:46,353 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:08:46,353 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:08:46,353 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1371339125] [2024-06-20 16:08:46,353 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1371339125] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:08:46,353 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:08:46,353 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:08:46,353 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [266802750] [2024-06-20 16:08:46,353 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:08:46,353 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:08:46,353 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:08:46,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:08:46,354 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:08:46,425 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-20 16:08:46,426 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 346 places, 517 transitions, 7661 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 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) [2024-06-20 16:08:46,426 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:08:46,426 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-20 16:08:46,426 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:08:48,003 INFO L124 PetriNetUnfolderBase]: 4314/6870 cut-off events. [2024-06-20 16:08:48,004 INFO L125 PetriNetUnfolderBase]: For 923503/923511 co-relation queries the response was YES. [2024-06-20 16:08:48,078 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65098 conditions, 6870 events. 4314/6870 cut-off events. For 923503/923511 co-relation queries the response was YES. Maximal size of possible extension queue 385. Compared 42493 event pairs, 829 based on Foata normal form. 10/6879 useless extension candidates. Maximal degree in co-relation 64939. Up to 6576 conditions per place. [2024-06-20 16:08:48,108 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 478 selfloop transitions, 51 changer transitions 0/533 dead transitions. [2024-06-20 16:08:48,108 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 353 places, 533 transitions, 9009 flow [2024-06-20 16:08:48,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:08:48,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:08:48,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 133 transitions. [2024-06-20 16:08:48,109 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4054878048780488 [2024-06-20 16:08:48,109 INFO L175 Difference]: Start difference. First operand has 346 places, 517 transitions, 7661 flow. Second operand 8 states and 133 transitions. [2024-06-20 16:08:48,109 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 353 places, 533 transitions, 9009 flow [2024-06-20 16:08:51,591 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 348 places, 533 transitions, 8823 flow, removed 52 selfloop flow, removed 5 redundant places. [2024-06-20 16:08:51,597 INFO L231 Difference]: Finished difference. Result has 349 places, 517 transitions, 7584 flow [2024-06-20 16:08:51,597 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7475, PETRI_DIFFERENCE_MINUEND_PLACES=341, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=517, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=466, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7584, PETRI_PLACES=349, PETRI_TRANSITIONS=517} [2024-06-20 16:08:51,598 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 307 predicate places. [2024-06-20 16:08:51,598 INFO L495 AbstractCegarLoop]: Abstraction has has 349 places, 517 transitions, 7584 flow [2024-06-20 16:08:51,598 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 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) [2024-06-20 16:08:51,598 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:08:51,598 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:08:51,598 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98 [2024-06-20 16:08:51,598 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)] === [2024-06-20 16:08:51,598 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:08:51,598 INFO L85 PathProgramCache]: Analyzing trace with hash 1135639320, now seen corresponding path program 4 times [2024-06-20 16:08:51,599 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:08:51,599 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [876647914] [2024-06-20 16:08:51,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:08:51,599 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:08:51,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:08:52,406 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:08:52,406 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:08:52,406 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [876647914] [2024-06-20 16:08:52,406 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [876647914] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:08:52,406 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:08:52,406 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:08:52,406 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1598313192] [2024-06-20 16:08:52,406 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:08:52,406 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:08:52,407 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:08:52,407 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:08:52,407 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:08:52,469 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-20 16:08:52,469 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 349 places, 517 transitions, 7584 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 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) [2024-06-20 16:08:52,469 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:08:52,469 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-20 16:08:52,469 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:08:54,034 INFO L124 PetriNetUnfolderBase]: 4287/6813 cut-off events. [2024-06-20 16:08:54,034 INFO L125 PetriNetUnfolderBase]: For 928597/928599 co-relation queries the response was YES. [2024-06-20 16:08:54,110 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64650 conditions, 6813 events. 4287/6813 cut-off events. For 928597/928599 co-relation queries the response was YES. Maximal size of possible extension queue 384. Compared 42031 event pairs, 836 based on Foata normal form. 1/6813 useless extension candidates. Maximal degree in co-relation 64490. Up to 6522 conditions per place. [2024-06-20 16:08:54,139 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 467 selfloop transitions, 56 changer transitions 0/527 dead transitions. [2024-06-20 16:08:54,139 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 356 places, 527 transitions, 8656 flow [2024-06-20 16:08:54,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:08:54,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:08:54,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 129 transitions. [2024-06-20 16:08:54,140 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3932926829268293 [2024-06-20 16:08:54,140 INFO L175 Difference]: Start difference. First operand has 349 places, 517 transitions, 7584 flow. Second operand 8 states and 129 transitions. [2024-06-20 16:08:54,140 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 356 places, 527 transitions, 8656 flow [2024-06-20 16:08:57,713 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 351 places, 527 transitions, 8539 flow, removed 12 selfloop flow, removed 5 redundant places. [2024-06-20 16:08:57,719 INFO L231 Difference]: Finished difference. Result has 352 places, 517 transitions, 7585 flow [2024-06-20 16:08:57,720 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7467, PETRI_DIFFERENCE_MINUEND_PLACES=344, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=517, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=461, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7585, PETRI_PLACES=352, PETRI_TRANSITIONS=517} [2024-06-20 16:08:57,720 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 310 predicate places. [2024-06-20 16:08:57,720 INFO L495 AbstractCegarLoop]: Abstraction has has 352 places, 517 transitions, 7585 flow [2024-06-20 16:08:57,720 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 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) [2024-06-20 16:08:57,720 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:08:57,720 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:08:57,720 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99 [2024-06-20 16:08:57,721 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)] === [2024-06-20 16:08:57,721 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:08:57,721 INFO L85 PathProgramCache]: Analyzing trace with hash 1135996812, now seen corresponding path program 12 times [2024-06-20 16:08:57,721 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:08:57,721 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1412281125] [2024-06-20 16:08:57,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:08:57,721 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:08:57,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:08:58,341 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:08:58,341 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:08:58,341 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1412281125] [2024-06-20 16:08:58,341 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1412281125] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:08:58,341 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:08:58,341 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:08:58,341 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [887244061] [2024-06-20 16:08:58,341 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:08:58,341 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:08:58,342 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:08:58,342 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:08:58,342 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:08:58,427 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-20 16:08:58,427 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 352 places, 517 transitions, 7585 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 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) [2024-06-20 16:08:58,428 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:08:58,428 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-20 16:08:58,428 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:09:00,146 INFO L124 PetriNetUnfolderBase]: 4281/6812 cut-off events. [2024-06-20 16:09:00,147 INFO L125 PetriNetUnfolderBase]: For 940146/940154 co-relation queries the response was YES. [2024-06-20 16:09:00,211 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64501 conditions, 6812 events. 4281/6812 cut-off events. For 940146/940154 co-relation queries the response was YES. Maximal size of possible extension queue 384. Compared 42090 event pairs, 821 based on Foata normal form. 10/6821 useless extension candidates. Maximal degree in co-relation 64340. Up to 6545 conditions per place. [2024-06-20 16:09:00,236 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 485 selfloop transitions, 41 changer transitions 0/530 dead transitions. [2024-06-20 16:09:00,236 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 359 places, 530 transitions, 8704 flow [2024-06-20 16:09:00,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:09:00,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:09:00,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 130 transitions. [2024-06-20 16:09:00,239 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39634146341463417 [2024-06-20 16:09:00,239 INFO L175 Difference]: Start difference. First operand has 352 places, 517 transitions, 7585 flow. Second operand 8 states and 130 transitions. [2024-06-20 16:09:00,239 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 359 places, 530 transitions, 8704 flow [2024-06-20 16:09:04,350 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 352 places, 530 transitions, 8475 flow, removed 37 selfloop flow, removed 7 redundant places. [2024-06-20 16:09:04,356 INFO L231 Difference]: Finished difference. Result has 353 places, 517 transitions, 7444 flow [2024-06-20 16:09:04,357 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7356, PETRI_DIFFERENCE_MINUEND_PLACES=345, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=517, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=476, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7444, PETRI_PLACES=353, PETRI_TRANSITIONS=517} [2024-06-20 16:09:04,357 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 311 predicate places. [2024-06-20 16:09:04,357 INFO L495 AbstractCegarLoop]: Abstraction has has 353 places, 517 transitions, 7444 flow [2024-06-20 16:09:04,357 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 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) [2024-06-20 16:09:04,357 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:09:04,357 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:09:04,358 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100 [2024-06-20 16:09:04,358 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)] === [2024-06-20 16:09:04,358 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:09:04,358 INFO L85 PathProgramCache]: Analyzing trace with hash 1135636344, now seen corresponding path program 4 times [2024-06-20 16:09:04,358 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:09:04,358 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [464289374] [2024-06-20 16:09:04,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:09:04,359 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:09:04,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:09:05,211 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:09:05,211 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:09:05,211 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [464289374] [2024-06-20 16:09:05,211 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [464289374] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:09:05,211 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:09:05,211 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:09:05,212 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1403582271] [2024-06-20 16:09:05,212 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:09:05,212 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:09:05,212 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:09:05,212 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:09:05,212 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:09:05,300 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-20 16:09:05,301 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 353 places, 517 transitions, 7444 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 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) [2024-06-20 16:09:05,301 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:09:05,301 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-20 16:09:05,301 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:09:07,000 INFO L124 PetriNetUnfolderBase]: 4289/6817 cut-off events. [2024-06-20 16:09:07,000 INFO L125 PetriNetUnfolderBase]: For 954220/954222 co-relation queries the response was YES. [2024-06-20 16:09:07,071 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64613 conditions, 6817 events. 4289/6817 cut-off events. For 954220/954222 co-relation queries the response was YES. Maximal size of possible extension queue 386. Compared 42061 event pairs, 835 based on Foata normal form. 2/6818 useless extension candidates. Maximal degree in co-relation 64451. Up to 6523 conditions per place. [2024-06-20 16:09:07,101 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 471 selfloop transitions, 55 changer transitions 0/530 dead transitions. [2024-06-20 16:09:07,101 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 360 places, 530 transitions, 8576 flow [2024-06-20 16:09:07,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:09:07,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:09:07,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 129 transitions. [2024-06-20 16:09:07,102 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3932926829268293 [2024-06-20 16:09:07,102 INFO L175 Difference]: Start difference. First operand has 353 places, 517 transitions, 7444 flow. Second operand 8 states and 129 transitions. [2024-06-20 16:09:07,102 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 360 places, 530 transitions, 8576 flow [2024-06-20 16:09:10,644 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 352 places, 530 transitions, 8454 flow, removed 3 selfloop flow, removed 8 redundant places. [2024-06-20 16:09:10,651 INFO L231 Difference]: Finished difference. Result has 353 places, 519 transitions, 7493 flow [2024-06-20 16:09:10,651 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7322, PETRI_DIFFERENCE_MINUEND_PLACES=345, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=517, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=462, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7493, PETRI_PLACES=353, PETRI_TRANSITIONS=519} [2024-06-20 16:09:10,651 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 311 predicate places. [2024-06-20 16:09:10,652 INFO L495 AbstractCegarLoop]: Abstraction has has 353 places, 519 transitions, 7493 flow [2024-06-20 16:09:10,652 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 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) [2024-06-20 16:09:10,652 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:09:10,652 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:09:10,652 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101 [2024-06-20 16:09:10,652 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)] === [2024-06-20 16:09:10,652 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:09:10,653 INFO L85 PathProgramCache]: Analyzing trace with hash 1205353928, now seen corresponding path program 5 times [2024-06-20 16:09:10,653 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:09:10,653 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [289960526] [2024-06-20 16:09:10,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:09:10,653 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:09:10,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:09:11,371 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:09:11,371 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:09:11,371 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [289960526] [2024-06-20 16:09:11,371 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [289960526] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:09:11,371 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:09:11,371 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:09:11,371 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [859819818] [2024-06-20 16:09:11,371 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:09:11,372 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:09:11,372 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:09:11,372 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:09:11,372 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:09:11,461 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-20 16:09:11,462 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 353 places, 519 transitions, 7493 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 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) [2024-06-20 16:09:11,462 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:09:11,462 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-20 16:09:11,462 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:09:13,207 INFO L124 PetriNetUnfolderBase]: 4334/6894 cut-off events. [2024-06-20 16:09:13,207 INFO L125 PetriNetUnfolderBase]: For 972919/972925 co-relation queries the response was YES. [2024-06-20 16:09:13,282 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65381 conditions, 6894 events. 4334/6894 cut-off events. For 972919/972925 co-relation queries the response was YES. Maximal size of possible extension queue 390. Compared 42645 event pairs, 821 based on Foata normal form. 8/6901 useless extension candidates. Maximal degree in co-relation 65218. Up to 6570 conditions per place. [2024-06-20 16:09:13,313 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 488 selfloop transitions, 71 changer transitions 0/563 dead transitions. [2024-06-20 16:09:13,313 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 361 places, 563 transitions, 9004 flow [2024-06-20 16:09:13,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:09:13,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:09:13,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 157 transitions. [2024-06-20 16:09:13,314 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4254742547425474 [2024-06-20 16:09:13,314 INFO L175 Difference]: Start difference. First operand has 353 places, 519 transitions, 7493 flow. Second operand 9 states and 157 transitions. [2024-06-20 16:09:13,314 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 361 places, 563 transitions, 9004 flow [2024-06-20 16:09:17,645 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 354 places, 563 transitions, 8829 flow, removed 20 selfloop flow, removed 7 redundant places. [2024-06-20 16:09:17,651 INFO L231 Difference]: Finished difference. Result has 357 places, 538 transitions, 7852 flow [2024-06-20 16:09:17,652 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7342, PETRI_DIFFERENCE_MINUEND_PLACES=346, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=519, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=458, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7852, PETRI_PLACES=357, PETRI_TRANSITIONS=538} [2024-06-20 16:09:17,652 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 315 predicate places. [2024-06-20 16:09:17,652 INFO L495 AbstractCegarLoop]: Abstraction has has 357 places, 538 transitions, 7852 flow [2024-06-20 16:09:17,652 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 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) [2024-06-20 16:09:17,652 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:09:17,652 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:09:17,652 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102 [2024-06-20 16:09:17,652 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)] === [2024-06-20 16:09:17,652 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:09:17,652 INFO L85 PathProgramCache]: Analyzing trace with hash 144030274, now seen corresponding path program 6 times [2024-06-20 16:09:17,652 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:09:17,653 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [77236915] [2024-06-20 16:09:17,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:09:17,653 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:09:17,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:09:18,651 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:09:18,651 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:09:18,651 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [77236915] [2024-06-20 16:09:18,651 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [77236915] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:09:18,651 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:09:18,651 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:09:18,651 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [317527304] [2024-06-20 16:09:18,651 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:09:18,652 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:09:18,652 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:09:18,652 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:09:18,652 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:09:18,732 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-20 16:09:18,733 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 357 places, 538 transitions, 7852 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 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) [2024-06-20 16:09:18,733 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:09:18,733 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-20 16:09:18,733 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:09:20,483 INFO L124 PetriNetUnfolderBase]: 4357/6929 cut-off events. [2024-06-20 16:09:20,484 INFO L125 PetriNetUnfolderBase]: For 980893/980895 co-relation queries the response was YES. [2024-06-20 16:09:20,560 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65946 conditions, 6929 events. 4357/6929 cut-off events. For 980893/980895 co-relation queries the response was YES. Maximal size of possible extension queue 393. Compared 42850 event pairs, 822 based on Foata normal form. 4/6932 useless extension candidates. Maximal degree in co-relation 65780. Up to 6593 conditions per place. [2024-06-20 16:09:20,590 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 491 selfloop transitions, 79 changer transitions 0/574 dead transitions. [2024-06-20 16:09:20,590 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 365 places, 574 transitions, 9313 flow [2024-06-20 16:09:20,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:09:20,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:09:20,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 158 transitions. [2024-06-20 16:09:20,591 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4281842818428184 [2024-06-20 16:09:20,591 INFO L175 Difference]: Start difference. First operand has 357 places, 538 transitions, 7852 flow. Second operand 9 states and 158 transitions. [2024-06-20 16:09:20,591 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 365 places, 574 transitions, 9313 flow [2024-06-20 16:09:24,402 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 361 places, 574 transitions, 9111 flow, removed 55 selfloop flow, removed 4 redundant places. [2024-06-20 16:09:24,409 INFO L231 Difference]: Finished difference. Result has 364 places, 551 transitions, 8129 flow [2024-06-20 16:09:24,409 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7699, PETRI_DIFFERENCE_MINUEND_PLACES=353, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=538, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=464, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8129, PETRI_PLACES=364, PETRI_TRANSITIONS=551} [2024-06-20 16:09:24,409 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 322 predicate places. [2024-06-20 16:09:24,409 INFO L495 AbstractCegarLoop]: Abstraction has has 364 places, 551 transitions, 8129 flow [2024-06-20 16:09:24,409 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 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) [2024-06-20 16:09:24,409 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:09:24,409 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:09:24,409 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103 [2024-06-20 16:09:24,409 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)] === [2024-06-20 16:09:24,410 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:09:24,410 INFO L85 PathProgramCache]: Analyzing trace with hash -1094580956, now seen corresponding path program 1 times [2024-06-20 16:09:24,410 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:09:24,410 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1351049448] [2024-06-20 16:09:24,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:09:24,410 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:09:24,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:09:25,391 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:09:25,391 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:09:25,391 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1351049448] [2024-06-20 16:09:25,391 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1351049448] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:09:25,391 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:09:25,391 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:09:25,391 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1134361899] [2024-06-20 16:09:25,391 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:09:25,391 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:09:25,392 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:09:25,392 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:09:25,392 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:09:25,512 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 16:09:25,512 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 364 places, 551 transitions, 8129 flow. Second operand has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:09:25,512 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:09:25,512 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 16:09:25,512 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:09:27,217 INFO L124 PetriNetUnfolderBase]: 4224/6798 cut-off events. [2024-06-20 16:09:27,218 INFO L125 PetriNetUnfolderBase]: For 874260/874270 co-relation queries the response was YES. [2024-06-20 16:09:27,290 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62991 conditions, 6798 events. 4224/6798 cut-off events. For 874260/874270 co-relation queries the response was YES. Maximal size of possible extension queue 397. Compared 42835 event pairs, 749 based on Foata normal form. 2/6791 useless extension candidates. Maximal degree in co-relation 62822. Up to 6347 conditions per place. [2024-06-20 16:09:27,318 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 511 selfloop transitions, 28 changer transitions 0/573 dead transitions. [2024-06-20 16:09:27,318 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 370 places, 573 transitions, 9645 flow [2024-06-20 16:09:27,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 16:09:27,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 16:09:27,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 130 transitions. [2024-06-20 16:09:27,319 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4529616724738676 [2024-06-20 16:09:27,319 INFO L175 Difference]: Start difference. First operand has 364 places, 551 transitions, 8129 flow. Second operand 7 states and 130 transitions. [2024-06-20 16:09:27,319 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 370 places, 573 transitions, 9645 flow [2024-06-20 16:09:31,808 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 364 places, 573 transitions, 9482 flow, removed 5 selfloop flow, removed 6 redundant places. [2024-06-20 16:09:31,815 INFO L231 Difference]: Finished difference. Result has 365 places, 555 transitions, 8207 flow [2024-06-20 16:09:31,815 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7966, PETRI_DIFFERENCE_MINUEND_PLACES=358, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=551, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=525, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=8207, PETRI_PLACES=365, PETRI_TRANSITIONS=555} [2024-06-20 16:09:31,815 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 323 predicate places. [2024-06-20 16:09:31,815 INFO L495 AbstractCegarLoop]: Abstraction has has 365 places, 555 transitions, 8207 flow [2024-06-20 16:09:31,815 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:09:31,815 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:09:31,815 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:09:31,815 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104 [2024-06-20 16:09:31,816 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)] === [2024-06-20 16:09:31,816 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:09:31,816 INFO L85 PathProgramCache]: Analyzing trace with hash -2044359734, now seen corresponding path program 1 times [2024-06-20 16:09:31,816 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:09:31,816 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [438395514] [2024-06-20 16:09:31,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:09:31,816 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:09:31,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:09:32,657 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:09:32,657 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:09:32,657 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [438395514] [2024-06-20 16:09:32,657 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [438395514] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:09:32,657 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:09:32,657 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:09:32,658 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [499192292] [2024-06-20 16:09:32,658 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:09:32,658 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:09:32,658 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:09:32,658 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:09:32,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:09:32,738 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 16:09:32,738 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 365 places, 555 transitions, 8207 flow. Second operand has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:09:32,738 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:09:32,739 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 16:09:32,739 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:09:34,458 INFO L124 PetriNetUnfolderBase]: 4241/6820 cut-off events. [2024-06-20 16:09:34,459 INFO L125 PetriNetUnfolderBase]: For 895543/895553 co-relation queries the response was YES. [2024-06-20 16:09:34,538 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63396 conditions, 6820 events. 4241/6820 cut-off events. For 895543/895553 co-relation queries the response was YES. Maximal size of possible extension queue 397. Compared 43008 event pairs, 790 based on Foata normal form. 2/6813 useless extension candidates. Maximal degree in co-relation 63226. Up to 6300 conditions per place. [2024-06-20 16:09:34,569 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 483 selfloop transitions, 67 changer transitions 0/584 dead transitions. [2024-06-20 16:09:34,570 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 374 places, 584 transitions, 9693 flow [2024-06-20 16:09:34,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 16:09:34,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 16:09:34,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 180 transitions. [2024-06-20 16:09:34,571 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43902439024390244 [2024-06-20 16:09:34,571 INFO L175 Difference]: Start difference. First operand has 365 places, 555 transitions, 8207 flow. Second operand 10 states and 180 transitions. [2024-06-20 16:09:34,571 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 374 places, 584 transitions, 9693 flow [2024-06-20 16:09:38,613 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 371 places, 584 transitions, 9561 flow, removed 54 selfloop flow, removed 3 redundant places. [2024-06-20 16:09:38,620 INFO L231 Difference]: Finished difference. Result has 372 places, 561 transitions, 8327 flow [2024-06-20 16:09:38,620 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8075, PETRI_DIFFERENCE_MINUEND_PLACES=362, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=555, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=491, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=8327, PETRI_PLACES=372, PETRI_TRANSITIONS=561} [2024-06-20 16:09:38,620 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 330 predicate places. [2024-06-20 16:09:38,620 INFO L495 AbstractCegarLoop]: Abstraction has has 372 places, 561 transitions, 8327 flow [2024-06-20 16:09:38,620 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:09:38,620 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:09:38,620 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:09:38,620 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105 [2024-06-20 16:09:38,620 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)] === [2024-06-20 16:09:38,621 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:09:38,621 INFO L85 PathProgramCache]: Analyzing trace with hash -2044359858, now seen corresponding path program 2 times [2024-06-20 16:09:38,621 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:09:38,621 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [306199778] [2024-06-20 16:09:38,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:09:38,621 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:09:38,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:09:39,437 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:09:39,437 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:09:39,437 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [306199778] [2024-06-20 16:09:39,437 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [306199778] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:09:39,437 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:09:39,437 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:09:39,437 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1987668908] [2024-06-20 16:09:39,437 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:09:39,438 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:09:39,438 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:09:39,438 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:09:39,438 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:09:39,564 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 16:09:39,564 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 372 places, 561 transitions, 8327 flow. Second operand has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:09:39,564 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:09:39,564 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 16:09:39,564 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:09:41,281 INFO L124 PetriNetUnfolderBase]: 4254/6839 cut-off events. [2024-06-20 16:09:41,281 INFO L125 PetriNetUnfolderBase]: For 916415/916425 co-relation queries the response was YES. [2024-06-20 16:09:41,362 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64160 conditions, 6839 events. 4254/6839 cut-off events. For 916415/916425 co-relation queries the response was YES. Maximal size of possible extension queue 399. Compared 43158 event pairs, 789 based on Foata normal form. 2/6832 useless extension candidates. Maximal degree in co-relation 63988. Up to 6424 conditions per place. [2024-06-20 16:09:41,393 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 520 selfloop transitions, 29 changer transitions 0/583 dead transitions. [2024-06-20 16:09:41,393 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 379 places, 583 transitions, 9589 flow [2024-06-20 16:09:41,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:09:41,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:09:41,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 142 transitions. [2024-06-20 16:09:41,394 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4329268292682927 [2024-06-20 16:09:41,394 INFO L175 Difference]: Start difference. First operand has 372 places, 561 transitions, 8327 flow. Second operand 8 states and 142 transitions. [2024-06-20 16:09:41,394 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 379 places, 583 transitions, 9589 flow [2024-06-20 16:09:45,918 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 373 places, 583 transitions, 9415 flow, removed 48 selfloop flow, removed 6 redundant places. [2024-06-20 16:09:45,926 INFO L231 Difference]: Finished difference. Result has 374 places, 566 transitions, 8330 flow [2024-06-20 16:09:45,926 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8176, PETRI_DIFFERENCE_MINUEND_PLACES=366, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=561, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=535, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8330, PETRI_PLACES=374, PETRI_TRANSITIONS=566} [2024-06-20 16:09:45,926 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 332 predicate places. [2024-06-20 16:09:45,927 INFO L495 AbstractCegarLoop]: Abstraction has has 374 places, 566 transitions, 8330 flow [2024-06-20 16:09:45,927 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:09:45,927 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:09:45,927 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:09:45,927 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106 [2024-06-20 16:09:45,927 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)] === [2024-06-20 16:09:45,927 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:09:45,928 INFO L85 PathProgramCache]: Analyzing trace with hash -2041563348, now seen corresponding path program 3 times [2024-06-20 16:09:45,928 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:09:45,928 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1168388915] [2024-06-20 16:09:45,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:09:45,928 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:09:45,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:09:46,787 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:09:46,787 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:09:46,787 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1168388915] [2024-06-20 16:09:46,788 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1168388915] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:09:46,788 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:09:46,788 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:09:46,788 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1858708591] [2024-06-20 16:09:46,788 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:09:46,788 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:09:46,788 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:09:46,789 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:09:46,789 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:09:46,882 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 16:09:46,882 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 374 places, 566 transitions, 8330 flow. Second operand has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:09:46,882 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:09:46,882 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 16:09:46,882 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:09:48,547 INFO L124 PetriNetUnfolderBase]: 4249/6832 cut-off events. [2024-06-20 16:09:48,547 INFO L125 PetriNetUnfolderBase]: For 919991/920001 co-relation queries the response was YES. [2024-06-20 16:09:48,631 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63944 conditions, 6832 events. 4249/6832 cut-off events. For 919991/920001 co-relation queries the response was YES. Maximal size of possible extension queue 399. Compared 43016 event pairs, 788 based on Foata normal form. 2/6825 useless extension candidates. Maximal degree in co-relation 63770. Up to 6432 conditions per place. [2024-06-20 16:09:48,661 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 521 selfloop transitions, 25 changer transitions 0/580 dead transitions. [2024-06-20 16:09:48,661 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 381 places, 580 transitions, 9464 flow [2024-06-20 16:09:48,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:09:48,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:09:48,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 139 transitions. [2024-06-20 16:09:48,662 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42378048780487804 [2024-06-20 16:09:48,662 INFO L175 Difference]: Start difference. First operand has 374 places, 566 transitions, 8330 flow. Second operand 8 states and 139 transitions. [2024-06-20 16:09:48,662 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 381 places, 580 transitions, 9464 flow [2024-06-20 16:09:52,886 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 377 places, 580 transitions, 9308 flow, removed 57 selfloop flow, removed 4 redundant places. [2024-06-20 16:09:52,893 INFO L231 Difference]: Finished difference. Result has 378 places, 566 transitions, 8229 flow [2024-06-20 16:09:52,893 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8174, PETRI_DIFFERENCE_MINUEND_PLACES=370, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=566, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=541, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8229, PETRI_PLACES=378, PETRI_TRANSITIONS=566} [2024-06-20 16:09:52,893 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 336 predicate places. [2024-06-20 16:09:52,893 INFO L495 AbstractCegarLoop]: Abstraction has has 378 places, 566 transitions, 8229 flow [2024-06-20 16:09:52,893 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:09:52,893 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:09:52,894 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:09:52,894 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107 [2024-06-20 16:09:52,894 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)] === [2024-06-20 16:09:52,894 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:09:52,894 INFO L85 PathProgramCache]: Analyzing trace with hash -1926272054, now seen corresponding path program 2 times [2024-06-20 16:09:52,894 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:09:52,894 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1166001648] [2024-06-20 16:09:52,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:09:52,894 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:09:52,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:09:53,664 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:09:53,665 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:09:53,665 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1166001648] [2024-06-20 16:09:53,665 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1166001648] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:09:53,665 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:09:53,665 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:09:53,665 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2080178367] [2024-06-20 16:09:53,665 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:09:53,665 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:09:53,665 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:09:53,665 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:09:53,666 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:09:53,749 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 16:09:53,749 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 378 places, 566 transitions, 8229 flow. Second operand has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:09:53,749 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:09:53,749 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 16:09:53,750 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:09:55,634 INFO L124 PetriNetUnfolderBase]: 4265/6854 cut-off events. [2024-06-20 16:09:55,634 INFO L125 PetriNetUnfolderBase]: For 935579/935589 co-relation queries the response was YES. [2024-06-20 16:09:55,710 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64061 conditions, 6854 events. 4265/6854 cut-off events. For 935579/935589 co-relation queries the response was YES. Maximal size of possible extension queue 401. Compared 43173 event pairs, 786 based on Foata normal form. 2/6845 useless extension candidates. Maximal degree in co-relation 63886. Up to 6332 conditions per place. [2024-06-20 16:09:55,745 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 490 selfloop transitions, 80 changer transitions 0/604 dead transitions. [2024-06-20 16:09:55,745 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 385 places, 604 transitions, 10343 flow [2024-06-20 16:09:55,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:09:55,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:09:55,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 158 transitions. [2024-06-20 16:09:55,746 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4817073170731707 [2024-06-20 16:09:55,746 INFO L175 Difference]: Start difference. First operand has 378 places, 566 transitions, 8229 flow. Second operand 8 states and 158 transitions. [2024-06-20 16:09:55,746 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 385 places, 604 transitions, 10343 flow [2024-06-20 16:10:00,075 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 377 places, 604 transitions, 10263 flow, removed 5 selfloop flow, removed 8 redundant places. [2024-06-20 16:10:00,082 INFO L231 Difference]: Finished difference. Result has 381 places, 578 transitions, 8660 flow [2024-06-20 16:10:00,082 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8149, PETRI_DIFFERENCE_MINUEND_PLACES=370, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=566, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=493, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8660, PETRI_PLACES=381, PETRI_TRANSITIONS=578} [2024-06-20 16:10:00,082 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 339 predicate places. [2024-06-20 16:10:00,082 INFO L495 AbstractCegarLoop]: Abstraction has has 381 places, 578 transitions, 8660 flow [2024-06-20 16:10:00,082 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:10:00,082 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:10:00,082 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:10:00,083 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108 [2024-06-20 16:10:00,083 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)] === [2024-06-20 16:10:00,083 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:10:00,083 INFO L85 PathProgramCache]: Analyzing trace with hash -1926094424, now seen corresponding path program 3 times [2024-06-20 16:10:00,083 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:10:00,083 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2026215355] [2024-06-20 16:10:00,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:10:00,083 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:10:00,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:10:00,989 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:10:00,989 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:10:00,989 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2026215355] [2024-06-20 16:10:00,989 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2026215355] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:10:00,989 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:10:00,989 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:10:00,989 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1464712366] [2024-06-20 16:10:00,989 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:10:00,989 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:10:00,989 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:10:00,990 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:10:00,990 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:10:01,088 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 16:10:01,088 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 381 places, 578 transitions, 8660 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:10:01,089 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:10:01,089 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 16:10:01,089 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:10:02,940 INFO L124 PetriNetUnfolderBase]: 4275/6870 cut-off events. [2024-06-20 16:10:02,940 INFO L125 PetriNetUnfolderBase]: For 963728/963738 co-relation queries the response was YES. [2024-06-20 16:10:03,015 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65216 conditions, 6870 events. 4275/6870 cut-off events. For 963728/963738 co-relation queries the response was YES. Maximal size of possible extension queue 403. Compared 43330 event pairs, 791 based on Foata normal form. 3/6864 useless extension candidates. Maximal degree in co-relation 65037. Up to 6384 conditions per place. [2024-06-20 16:10:03,045 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 501 selfloop transitions, 65 changer transitions 0/600 dead transitions. [2024-06-20 16:10:03,045 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 389 places, 600 transitions, 10125 flow [2024-06-20 16:10:03,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:10:03,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:10:03,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 162 transitions. [2024-06-20 16:10:03,046 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43902439024390244 [2024-06-20 16:10:03,046 INFO L175 Difference]: Start difference. First operand has 381 places, 578 transitions, 8660 flow. Second operand 9 states and 162 transitions. [2024-06-20 16:10:03,046 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 389 places, 600 transitions, 10125 flow [2024-06-20 16:10:08,223 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 387 places, 600 transitions, 10040 flow, removed 35 selfloop flow, removed 2 redundant places. [2024-06-20 16:10:08,230 INFO L231 Difference]: Finished difference. Result has 388 places, 581 transitions, 8775 flow [2024-06-20 16:10:08,230 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8575, PETRI_DIFFERENCE_MINUEND_PLACES=379, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=578, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=513, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8775, PETRI_PLACES=388, PETRI_TRANSITIONS=581} [2024-06-20 16:10:08,230 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 346 predicate places. [2024-06-20 16:10:08,230 INFO L495 AbstractCegarLoop]: Abstraction has has 388 places, 581 transitions, 8775 flow [2024-06-20 16:10:08,230 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:10:08,230 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:10:08,230 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:10:08,230 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109 [2024-06-20 16:10:08,231 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)] === [2024-06-20 16:10:08,231 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:10:08,231 INFO L85 PathProgramCache]: Analyzing trace with hash 683965866, now seen corresponding path program 4 times [2024-06-20 16:10:08,231 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:10:08,231 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1281849720] [2024-06-20 16:10:08,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:10:08,231 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:10:08,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:10:09,118 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:10:09,118 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:10:09,118 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1281849720] [2024-06-20 16:10:09,118 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1281849720] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:10:09,118 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:10:09,118 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:10:09,118 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1407259768] [2024-06-20 16:10:09,118 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:10:09,118 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:10:09,119 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:10:09,119 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:10:09,119 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:10:09,185 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 16:10:09,186 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 388 places, 581 transitions, 8775 flow. Second operand has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:10:09,186 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:10:09,186 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 16:10:09,186 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:10:10,982 INFO L124 PetriNetUnfolderBase]: 4296/6900 cut-off events. [2024-06-20 16:10:10,982 INFO L125 PetriNetUnfolderBase]: For 980086/980096 co-relation queries the response was YES. [2024-06-20 16:10:11,067 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65852 conditions, 6900 events. 4296/6900 cut-off events. For 980086/980096 co-relation queries the response was YES. Maximal size of possible extension queue 405. Compared 43470 event pairs, 787 based on Foata normal form. 2/6893 useless extension candidates. Maximal degree in co-relation 65671. Up to 6424 conditions per place. [2024-06-20 16:10:11,101 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 507 selfloop transitions, 63 changer transitions 0/604 dead transitions. [2024-06-20 16:10:11,101 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 395 places, 604 transitions, 10046 flow [2024-06-20 16:10:11,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:10:11,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:10:11,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 149 transitions. [2024-06-20 16:10:11,102 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45426829268292684 [2024-06-20 16:10:11,102 INFO L175 Difference]: Start difference. First operand has 388 places, 581 transitions, 8775 flow. Second operand 8 states and 149 transitions. [2024-06-20 16:10:11,102 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 395 places, 604 transitions, 10046 flow [2024-06-20 16:10:16,194 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 389 places, 604 transitions, 9923 flow, removed 18 selfloop flow, removed 6 redundant places. [2024-06-20 16:10:16,201 INFO L231 Difference]: Finished difference. Result has 390 places, 584 transitions, 8854 flow [2024-06-20 16:10:16,202 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8652, PETRI_DIFFERENCE_MINUEND_PLACES=382, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=581, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=518, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8854, PETRI_PLACES=390, PETRI_TRANSITIONS=584} [2024-06-20 16:10:16,202 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 348 predicate places. [2024-06-20 16:10:16,202 INFO L495 AbstractCegarLoop]: Abstraction has has 390 places, 584 transitions, 8854 flow [2024-06-20 16:10:16,202 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:10:16,202 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:10:16,202 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:10:16,202 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110 [2024-06-20 16:10:16,202 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)] === [2024-06-20 16:10:16,203 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:10:16,203 INFO L85 PathProgramCache]: Analyzing trace with hash 620751044, now seen corresponding path program 1 times [2024-06-20 16:10:16,203 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:10:16,203 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1237578156] [2024-06-20 16:10:16,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:10:16,203 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:10:16,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:10:17,009 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:10:17,010 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:10:17,010 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1237578156] [2024-06-20 16:10:17,010 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1237578156] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:10:17,010 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:10:17,010 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:10:17,010 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [839135440] [2024-06-20 16:10:17,010 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:10:17,010 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:10:17,010 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:10:17,010 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:10:17,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:10:17,080 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-20 16:10:17,080 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 390 places, 584 transitions, 8854 flow. Second operand has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:10:17,080 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:10:17,080 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-20 16:10:17,080 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:10:18,949 INFO L124 PetriNetUnfolderBase]: 4448/7055 cut-off events. [2024-06-20 16:10:18,949 INFO L125 PetriNetUnfolderBase]: For 1120040/1120040 co-relation queries the response was YES. [2024-06-20 16:10:19,031 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69254 conditions, 7055 events. 4448/7055 cut-off events. For 1120040/1120040 co-relation queries the response was YES. Maximal size of possible extension queue 406. Compared 43637 event pairs, 855 based on Foata normal form. 1/7055 useless extension candidates. Maximal degree in co-relation 69072. Up to 6826 conditions per place. [2024-06-20 16:10:19,064 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 571 selfloop transitions, 23 changer transitions 0/598 dead transitions. [2024-06-20 16:10:19,064 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 397 places, 598 transitions, 10114 flow [2024-06-20 16:10:19,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:10:19,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:10:19,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 127 transitions. [2024-06-20 16:10:19,065 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3871951219512195 [2024-06-20 16:10:19,065 INFO L175 Difference]: Start difference. First operand has 390 places, 584 transitions, 8854 flow. Second operand 8 states and 127 transitions. [2024-06-20 16:10:19,065 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 397 places, 598 transitions, 10114 flow [2024-06-20 16:10:22,690 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 391 places, 598 transitions, 9909 flow, removed 39 selfloop flow, removed 6 redundant places. [2024-06-20 16:10:22,697 INFO L231 Difference]: Finished difference. Result has 392 places, 587 transitions, 8751 flow [2024-06-20 16:10:22,697 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8655, PETRI_DIFFERENCE_MINUEND_PLACES=384, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=584, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=561, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8751, PETRI_PLACES=392, PETRI_TRANSITIONS=587} [2024-06-20 16:10:22,697 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 350 predicate places. [2024-06-20 16:10:22,697 INFO L495 AbstractCegarLoop]: Abstraction has has 392 places, 587 transitions, 8751 flow [2024-06-20 16:10:22,698 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:10:22,698 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:10:22,698 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:10:22,698 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111 [2024-06-20 16:10:22,698 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)] === [2024-06-20 16:10:22,698 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:10:22,698 INFO L85 PathProgramCache]: Analyzing trace with hash 1021472902, now seen corresponding path program 5 times [2024-06-20 16:10:22,698 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:10:22,698 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2123657898] [2024-06-20 16:10:22,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:10:22,698 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:10:22,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:10:23,648 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:10:23,648 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:10:23,648 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2123657898] [2024-06-20 16:10:23,648 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2123657898] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:10:23,648 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:10:23,648 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:10:23,648 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [480310572] [2024-06-20 16:10:23,649 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:10:23,649 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:10:23,649 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:10:23,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:10:23,649 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:10:23,746 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 16:10:23,746 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 392 places, 587 transitions, 8751 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:10:23,746 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:10:23,746 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 16:10:23,746 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:10:25,484 INFO L124 PetriNetUnfolderBase]: 4316/6929 cut-off events. [2024-06-20 16:10:25,484 INFO L125 PetriNetUnfolderBase]: For 1011971/1011981 co-relation queries the response was YES. [2024-06-20 16:10:25,564 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66009 conditions, 6929 events. 4316/6929 cut-off events. For 1011971/1011981 co-relation queries the response was YES. Maximal size of possible extension queue 408. Compared 43667 event pairs, 790 based on Foata normal form. 3/6923 useless extension candidates. Maximal degree in co-relation 65826. Up to 6521 conditions per place. [2024-06-20 16:10:25,596 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 540 selfloop transitions, 30 changer transitions 0/604 dead transitions. [2024-06-20 16:10:25,596 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 400 places, 604 transitions, 10002 flow [2024-06-20 16:10:25,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:10:25,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:10:25,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 149 transitions. [2024-06-20 16:10:25,597 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4037940379403794 [2024-06-20 16:10:25,597 INFO L175 Difference]: Start difference. First operand has 392 places, 587 transitions, 8751 flow. Second operand 9 states and 149 transitions. [2024-06-20 16:10:25,597 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 400 places, 604 transitions, 10002 flow [2024-06-20 16:10:30,640 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 393 places, 604 transitions, 9906 flow, removed 11 selfloop flow, removed 7 redundant places. [2024-06-20 16:10:30,647 INFO L231 Difference]: Finished difference. Result has 394 places, 590 transitions, 8797 flow [2024-06-20 16:10:30,647 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8655, PETRI_DIFFERENCE_MINUEND_PLACES=385, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=587, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=557, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8797, PETRI_PLACES=394, PETRI_TRANSITIONS=590} [2024-06-20 16:10:30,648 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 352 predicate places. [2024-06-20 16:10:30,648 INFO L495 AbstractCegarLoop]: Abstraction has has 394 places, 590 transitions, 8797 flow [2024-06-20 16:10:30,648 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:10:30,648 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:10:30,648 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:10:30,648 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112 [2024-06-20 16:10:30,648 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)] === [2024-06-20 16:10:30,648 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:10:30,648 INFO L85 PathProgramCache]: Analyzing trace with hash 1313314828, now seen corresponding path program 6 times [2024-06-20 16:10:30,648 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:10:30,648 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [766066711] [2024-06-20 16:10:30,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:10:30,649 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:10:30,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:10:31,507 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:10:31,507 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:10:31,507 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [766066711] [2024-06-20 16:10:31,507 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [766066711] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:10:31,507 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:10:31,507 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:10:31,507 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2136983253] [2024-06-20 16:10:31,507 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:10:31,507 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:10:31,507 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:10:31,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:10:31,508 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:10:31,597 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-20 16:10:31,597 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 394 places, 590 transitions, 8797 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:10:31,597 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:10:31,597 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-20 16:10:31,597 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:10:33,415 INFO L124 PetriNetUnfolderBase]: 4311/6919 cut-off events. [2024-06-20 16:10:33,415 INFO L125 PetriNetUnfolderBase]: For 1008898/1008908 co-relation queries the response was YES. [2024-06-20 16:10:33,505 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65778 conditions, 6919 events. 4311/6919 cut-off events. For 1008898/1008908 co-relation queries the response was YES. Maximal size of possible extension queue 408. Compared 43596 event pairs, 787 based on Foata normal form. 3/6911 useless extension candidates. Maximal degree in co-relation 65594. Up to 6504 conditions per place. [2024-06-20 16:10:33,537 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 529 selfloop transitions, 42 changer transitions 0/605 dead transitions. [2024-06-20 16:10:33,537 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 402 places, 605 transitions, 9985 flow [2024-06-20 16:10:33,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:10:33,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:10:33,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 153 transitions. [2024-06-20 16:10:33,538 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4146341463414634 [2024-06-20 16:10:33,538 INFO L175 Difference]: Start difference. First operand has 394 places, 590 transitions, 8797 flow. Second operand 9 states and 153 transitions. [2024-06-20 16:10:33,538 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 402 places, 605 transitions, 9985 flow [2024-06-20 16:10:39,350 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 395 places, 605 transitions, 9856 flow, removed 37 selfloop flow, removed 7 redundant places. [2024-06-20 16:10:39,357 INFO L231 Difference]: Finished difference. Result has 396 places, 590 transitions, 8759 flow [2024-06-20 16:10:39,357 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8668, PETRI_DIFFERENCE_MINUEND_PLACES=387, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=590, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=548, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8759, PETRI_PLACES=396, PETRI_TRANSITIONS=590} [2024-06-20 16:10:39,357 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 354 predicate places. [2024-06-20 16:10:39,357 INFO L495 AbstractCegarLoop]: Abstraction has has 396 places, 590 transitions, 8759 flow [2024-06-20 16:10:39,357 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:10:39,357 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:10:39,357 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:10:39,358 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113 [2024-06-20 16:10:39,358 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)] === [2024-06-20 16:10:39,358 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:10:39,358 INFO L85 PathProgramCache]: Analyzing trace with hash -388021754, now seen corresponding path program 1 times [2024-06-20 16:10:39,358 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:10:39,358 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [503427876] [2024-06-20 16:10:39,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:10:39,358 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:10:39,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:10:40,312 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:10:40,313 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:10:40,313 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [503427876] [2024-06-20 16:10:40,313 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [503427876] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:10:40,313 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:10:40,313 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:10:40,313 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [177750486] [2024-06-20 16:10:40,313 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:10:40,313 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:10:40,313 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:10:40,313 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:10:40,314 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:10:40,395 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-20 16:10:40,395 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 396 places, 590 transitions, 8759 flow. Second operand has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:10:40,395 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:10:40,395 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-20 16:10:40,395 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:10:42,287 INFO L124 PetriNetUnfolderBase]: 4464/7081 cut-off events. [2024-06-20 16:10:42,287 INFO L125 PetriNetUnfolderBase]: For 1160809/1160811 co-relation queries the response was YES. [2024-06-20 16:10:42,374 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69293 conditions, 7081 events. 4464/7081 cut-off events. For 1160809/1160811 co-relation queries the response was YES. Maximal size of possible extension queue 410. Compared 43830 event pairs, 833 based on Foata normal form. 4/7084 useless extension candidates. Maximal degree in co-relation 69108. Up to 6602 conditions per place. [2024-06-20 16:10:42,406 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 514 selfloop transitions, 105 changer transitions 0/623 dead transitions. [2024-06-20 16:10:42,406 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 404 places, 623 transitions, 10535 flow [2024-06-20 16:10:42,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:10:42,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:10:42,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 165 transitions. [2024-06-20 16:10:42,407 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44715447154471544 [2024-06-20 16:10:42,407 INFO L175 Difference]: Start difference. First operand has 396 places, 590 transitions, 8759 flow. Second operand 9 states and 165 transitions. [2024-06-20 16:10:42,407 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 404 places, 623 transitions, 10535 flow [2024-06-20 16:10:48,720 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 396 places, 623 transitions, 10401 flow, removed 14 selfloop flow, removed 8 redundant places. [2024-06-20 16:10:48,727 INFO L231 Difference]: Finished difference. Result has 397 places, 597 transitions, 9030 flow [2024-06-20 16:10:48,727 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8625, PETRI_DIFFERENCE_MINUEND_PLACES=388, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=590, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=101, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=488, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9030, PETRI_PLACES=397, PETRI_TRANSITIONS=597} [2024-06-20 16:10:48,727 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 355 predicate places. [2024-06-20 16:10:48,728 INFO L495 AbstractCegarLoop]: Abstraction has has 397 places, 597 transitions, 9030 flow [2024-06-20 16:10:48,728 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:10:48,728 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:10:48,728 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:10:48,728 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable114 [2024-06-20 16:10:48,728 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)] === [2024-06-20 16:10:48,728 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:10:48,728 INFO L85 PathProgramCache]: Analyzing trace with hash 494002426, now seen corresponding path program 2 times [2024-06-20 16:10:48,728 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:10:48,728 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [521061605] [2024-06-20 16:10:48,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:10:48,728 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:10:48,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:10:49,649 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:10:49,649 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:10:49,649 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [521061605] [2024-06-20 16:10:49,649 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [521061605] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:10:49,649 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:10:49,649 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:10:49,649 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1079838394] [2024-06-20 16:10:49,649 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:10:49,649 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:10:49,650 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:10:49,650 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:10:49,650 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:10:49,750 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-20 16:10:49,750 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 397 places, 597 transitions, 9030 flow. Second operand has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:10:49,750 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:10:49,750 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-20 16:10:49,751 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:10:51,650 INFO L124 PetriNetUnfolderBase]: 4479/7105 cut-off events. [2024-06-20 16:10:51,651 INFO L125 PetriNetUnfolderBase]: For 1183163/1183163 co-relation queries the response was YES. [2024-06-20 16:10:51,737 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70214 conditions, 7105 events. 4479/7105 cut-off events. For 1183163/1183163 co-relation queries the response was YES. Maximal size of possible extension queue 412. Compared 43961 event pairs, 834 based on Foata normal form. 1/7105 useless extension candidates. Maximal degree in co-relation 70028. Up to 6724 conditions per place. [2024-06-20 16:10:51,771 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 520 selfloop transitions, 100 changer transitions 0/624 dead transitions. [2024-06-20 16:10:51,771 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 406 places, 624 transitions, 10498 flow [2024-06-20 16:10:51,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 16:10:51,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 16:10:51,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 166 transitions. [2024-06-20 16:10:51,772 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40487804878048783 [2024-06-20 16:10:51,772 INFO L175 Difference]: Start difference. First operand has 397 places, 597 transitions, 9030 flow. Second operand 10 states and 166 transitions. [2024-06-20 16:10:51,772 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 406 places, 624 transitions, 10498 flow [2024-06-20 16:10:57,146 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 402 places, 624 transitions, 10270 flow, removed 89 selfloop flow, removed 4 redundant places. [2024-06-20 16:10:57,153 INFO L231 Difference]: Finished difference. Result has 404 places, 607 transitions, 9219 flow [2024-06-20 16:10:57,153 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8825, PETRI_DIFFERENCE_MINUEND_PLACES=393, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=597, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=90, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=503, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=9219, PETRI_PLACES=404, PETRI_TRANSITIONS=607} [2024-06-20 16:10:57,154 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 362 predicate places. [2024-06-20 16:10:57,154 INFO L495 AbstractCegarLoop]: Abstraction has has 404 places, 607 transitions, 9219 flow [2024-06-20 16:10:57,154 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:10:57,154 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:10:57,154 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:10:57,154 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115 [2024-06-20 16:10:57,154 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)] === [2024-06-20 16:10:57,154 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:10:57,155 INFO L85 PathProgramCache]: Analyzing trace with hash 493765276, now seen corresponding path program 3 times [2024-06-20 16:10:57,155 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:10:57,155 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [476357819] [2024-06-20 16:10:57,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:10:57,155 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:10:57,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:10:58,077 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:10:58,077 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:10:58,077 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [476357819] [2024-06-20 16:10:58,077 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [476357819] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:10:58,077 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:10:58,077 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:10:58,078 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1786320458] [2024-06-20 16:10:58,078 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:10:58,078 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:10:58,078 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:10:58,078 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:10:58,078 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:10:58,188 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-20 16:10:58,188 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 404 places, 607 transitions, 9219 flow. Second operand has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:10:58,188 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:10:58,188 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-20 16:10:58,188 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:11:00,240 INFO L124 PetriNetUnfolderBase]: 4497/7129 cut-off events. [2024-06-20 16:11:00,240 INFO L125 PetriNetUnfolderBase]: For 1210464/1210466 co-relation queries the response was YES. [2024-06-20 16:11:00,323 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70897 conditions, 7129 events. 4497/7129 cut-off events. For 1210464/1210466 co-relation queries the response was YES. Maximal size of possible extension queue 415. Compared 44099 event pairs, 826 based on Foata normal form. 3/7131 useless extension candidates. Maximal degree in co-relation 70708. Up to 6728 conditions per place. [2024-06-20 16:11:00,357 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 520 selfloop transitions, 114 changer transitions 0/638 dead transitions. [2024-06-20 16:11:00,357 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 412 places, 638 transitions, 11001 flow [2024-06-20 16:11:00,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:11:00,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:11:00,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 159 transitions. [2024-06-20 16:11:00,358 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43089430894308944 [2024-06-20 16:11:00,358 INFO L175 Difference]: Start difference. First operand has 404 places, 607 transitions, 9219 flow. Second operand 9 states and 159 transitions. [2024-06-20 16:11:00,358 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 412 places, 638 transitions, 11001 flow [2024-06-20 16:11:07,279 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 407 places, 638 transitions, 10794 flow, removed 37 selfloop flow, removed 5 redundant places. [2024-06-20 16:11:07,287 INFO L231 Difference]: Finished difference. Result has 408 places, 616 transitions, 9468 flow [2024-06-20 16:11:07,287 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9018, PETRI_DIFFERENCE_MINUEND_PLACES=399, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=607, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=108, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=499, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9468, PETRI_PLACES=408, PETRI_TRANSITIONS=616} [2024-06-20 16:11:07,287 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 366 predicate places. [2024-06-20 16:11:07,287 INFO L495 AbstractCegarLoop]: Abstraction has has 408 places, 616 transitions, 9468 flow [2024-06-20 16:11:07,287 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:11:07,287 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:11:07,287 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:11:07,287 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116 [2024-06-20 16:11:07,287 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)] === [2024-06-20 16:11:07,288 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:11:07,288 INFO L85 PathProgramCache]: Analyzing trace with hash -398856509, now seen corresponding path program 1 times [2024-06-20 16:11:07,288 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:11:07,288 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [760743693] [2024-06-20 16:11:07,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:11:07,288 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:11:07,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:11:08,047 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:11:08,048 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:11:08,048 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [760743693] [2024-06-20 16:11:08,048 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [760743693] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:11:08,048 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:11:08,048 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:11:08,048 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1380546332] [2024-06-20 16:11:08,048 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:11:08,048 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:11:08,048 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:11:08,049 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:11:08,049 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:11:08,130 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-20 16:11:08,130 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 408 places, 616 transitions, 9468 flow. Second operand has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:11:08,130 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:11:08,130 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-20 16:11:08,130 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:11:10,111 INFO L124 PetriNetUnfolderBase]: 4502/7136 cut-off events. [2024-06-20 16:11:10,111 INFO L125 PetriNetUnfolderBase]: For 1231009/1231011 co-relation queries the response was YES. [2024-06-20 16:11:10,202 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71233 conditions, 7136 events. 4502/7136 cut-off events. For 1231009/1231011 co-relation queries the response was YES. Maximal size of possible extension queue 416. Compared 44165 event pairs, 833 based on Foata normal form. 3/7138 useless extension candidates. Maximal degree in co-relation 71043. Up to 6818 conditions per place. [2024-06-20 16:11:10,236 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 594 selfloop transitions, 46 changer transitions 0/644 dead transitions. [2024-06-20 16:11:10,237 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 415 places, 644 transitions, 11208 flow [2024-06-20 16:11:10,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:11:10,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:11:10,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 143 transitions. [2024-06-20 16:11:10,237 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43597560975609756 [2024-06-20 16:11:10,238 INFO L175 Difference]: Start difference. First operand has 408 places, 616 transitions, 9468 flow. Second operand 8 states and 143 transitions. [2024-06-20 16:11:10,238 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 415 places, 644 transitions, 11208 flow [2024-06-20 16:11:16,700 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 411 places, 644 transitions, 10999 flow, removed 48 selfloop flow, removed 4 redundant places. [2024-06-20 16:11:16,707 INFO L231 Difference]: Finished difference. Result has 412 places, 622 transitions, 9519 flow [2024-06-20 16:11:16,707 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9259, PETRI_DIFFERENCE_MINUEND_PLACES=404, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=616, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=573, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9519, PETRI_PLACES=412, PETRI_TRANSITIONS=622} [2024-06-20 16:11:16,708 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 370 predicate places. [2024-06-20 16:11:16,708 INFO L495 AbstractCegarLoop]: Abstraction has has 412 places, 622 transitions, 9519 flow [2024-06-20 16:11:16,708 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:11:16,708 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:11:16,708 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:11:16,708 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117 [2024-06-20 16:11:16,708 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)] === [2024-06-20 16:11:16,708 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:11:16,708 INFO L85 PathProgramCache]: Analyzing trace with hash -1523402809, now seen corresponding path program 2 times [2024-06-20 16:11:16,708 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:11:16,709 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1993935345] [2024-06-20 16:11:16,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:11:16,709 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:11:16,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:11:17,530 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:11:17,530 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:11:17,530 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1993935345] [2024-06-20 16:11:17,530 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1993935345] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:11:17,530 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:11:17,530 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:11:17,530 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1546040172] [2024-06-20 16:11:17,530 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:11:17,530 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:11:17,530 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:11:17,531 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:11:17,531 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:11:17,587 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-20 16:11:17,587 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 412 places, 622 transitions, 9519 flow. Second operand has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:11:17,588 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:11:17,588 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-20 16:11:17,588 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:11:19,529 INFO L124 PetriNetUnfolderBase]: 4504/7145 cut-off events. [2024-06-20 16:11:19,529 INFO L125 PetriNetUnfolderBase]: For 1249256/1249258 co-relation queries the response was YES. [2024-06-20 16:11:19,614 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71495 conditions, 7145 events. 4504/7145 cut-off events. For 1249256/1249258 co-relation queries the response was YES. Maximal size of possible extension queue 419. Compared 44292 event pairs, 835 based on Foata normal form. 4/7148 useless extension candidates. Maximal degree in co-relation 71303. Up to 6779 conditions per place. [2024-06-20 16:11:19,646 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 580 selfloop transitions, 60 changer transitions 0/644 dead transitions. [2024-06-20 16:11:19,646 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 419 places, 644 transitions, 10959 flow [2024-06-20 16:11:19,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:11:19,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:11:19,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 142 transitions. [2024-06-20 16:11:19,647 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4329268292682927 [2024-06-20 16:11:19,647 INFO L175 Difference]: Start difference. First operand has 412 places, 622 transitions, 9519 flow. Second operand 8 states and 142 transitions. [2024-06-20 16:11:19,647 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 419 places, 644 transitions, 10959 flow [2024-06-20 16:11:25,551 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 415 places, 644 transitions, 10795 flow, removed 58 selfloop flow, removed 4 redundant places. [2024-06-20 16:11:25,559 INFO L231 Difference]: Finished difference. Result has 416 places, 625 transitions, 9583 flow [2024-06-20 16:11:25,559 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9356, PETRI_DIFFERENCE_MINUEND_PLACES=408, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=622, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=562, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9583, PETRI_PLACES=416, PETRI_TRANSITIONS=625} [2024-06-20 16:11:25,559 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 374 predicate places. [2024-06-20 16:11:25,559 INFO L495 AbstractCegarLoop]: Abstraction has has 416 places, 625 transitions, 9583 flow [2024-06-20 16:11:25,559 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:11:25,559 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:11:25,559 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:11:25,559 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118 [2024-06-20 16:11:25,560 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)] === [2024-06-20 16:11:25,560 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:11:25,560 INFO L85 PathProgramCache]: Analyzing trace with hash 461841392, now seen corresponding path program 1 times [2024-06-20 16:11:25,560 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:11:25,560 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [866715415] [2024-06-20 16:11:25,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:11:25,560 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:11:25,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:11:26,253 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:11:26,253 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:11:26,253 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [866715415] [2024-06-20 16:11:26,253 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [866715415] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:11:26,253 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:11:26,253 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:11:26,253 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1700818156] [2024-06-20 16:11:26,253 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:11:26,253 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:11:26,254 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:11:26,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:11:26,254 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:11:26,338 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-20 16:11:26,338 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 416 places, 625 transitions, 9583 flow. Second operand has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:11:26,338 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:11:26,339 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-20 16:11:26,339 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:11:28,231 INFO L124 PetriNetUnfolderBase]: 4514/7155 cut-off events. [2024-06-20 16:11:28,231 INFO L125 PetriNetUnfolderBase]: For 1270249/1270251 co-relation queries the response was YES. [2024-06-20 16:11:28,316 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71844 conditions, 7155 events. 4514/7155 cut-off events. For 1270249/1270251 co-relation queries the response was YES. Maximal size of possible extension queue 420. Compared 44323 event pairs, 838 based on Foata normal form. 4/7158 useless extension candidates. Maximal degree in co-relation 71650. Up to 6686 conditions per place. [2024-06-20 16:11:28,349 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 560 selfloop transitions, 89 changer transitions 0/653 dead transitions. [2024-06-20 16:11:28,349 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 423 places, 653 transitions, 11321 flow [2024-06-20 16:11:28,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:11:28,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:11:28,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 150 transitions. [2024-06-20 16:11:28,350 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4573170731707317 [2024-06-20 16:11:28,350 INFO L175 Difference]: Start difference. First operand has 416 places, 625 transitions, 9583 flow. Second operand 8 states and 150 transitions. [2024-06-20 16:11:28,350 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 423 places, 653 transitions, 11321 flow [2024-06-20 16:11:36,193 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 417 places, 653 transitions, 11121 flow, removed 44 selfloop flow, removed 6 redundant places. [2024-06-20 16:11:36,201 INFO L231 Difference]: Finished difference. Result has 418 places, 628 transitions, 9641 flow [2024-06-20 16:11:36,201 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9383, PETRI_DIFFERENCE_MINUEND_PLACES=410, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=625, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=86, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=539, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9641, PETRI_PLACES=418, PETRI_TRANSITIONS=628} [2024-06-20 16:11:36,201 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 376 predicate places. [2024-06-20 16:11:36,202 INFO L495 AbstractCegarLoop]: Abstraction has has 418 places, 628 transitions, 9641 flow [2024-06-20 16:11:36,202 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:11:36,202 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:11:36,202 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:11:36,202 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119 [2024-06-20 16:11:36,202 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)] === [2024-06-20 16:11:36,202 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:11:36,202 INFO L85 PathProgramCache]: Analyzing trace with hash -1519677787, now seen corresponding path program 1 times [2024-06-20 16:11:36,202 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:11:36,202 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1356433939] [2024-06-20 16:11:36,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:11:36,202 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:11:36,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:11:36,998 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:11:36,999 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:11:36,999 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1356433939] [2024-06-20 16:11:36,999 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1356433939] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:11:36,999 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:11:36,999 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:11:36,999 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [566634290] [2024-06-20 16:11:36,999 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:11:36,999 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:11:36,999 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:11:37,000 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:11:37,000 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:11:37,122 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-20 16:11:37,123 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 418 places, 628 transitions, 9641 flow. Second operand has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:11:37,123 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:11:37,123 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-20 16:11:37,123 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:11:39,133 INFO L124 PetriNetUnfolderBase]: 4784/7548 cut-off events. [2024-06-20 16:11:39,133 INFO L125 PetriNetUnfolderBase]: For 1413226/1413228 co-relation queries the response was YES. [2024-06-20 16:11:39,230 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77182 conditions, 7548 events. 4784/7548 cut-off events. For 1413226/1413228 co-relation queries the response was YES. Maximal size of possible extension queue 448. Compared 46733 event pairs, 842 based on Foata normal form. 10/7557 useless extension candidates. Maximal degree in co-relation 76987. Up to 6921 conditions per place. [2024-06-20 16:11:39,266 INFO L140 encePairwiseOnDemand]: 26/41 looper letters, 626 selfloop transitions, 87 changer transitions 0/717 dead transitions. [2024-06-20 16:11:39,267 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 427 places, 717 transitions, 12654 flow [2024-06-20 16:11:39,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 16:11:39,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 16:11:39,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 177 transitions. [2024-06-20 16:11:39,267 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4317073170731707 [2024-06-20 16:11:39,267 INFO L175 Difference]: Start difference. First operand has 418 places, 628 transitions, 9641 flow. Second operand 10 states and 177 transitions. [2024-06-20 16:11:39,267 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 427 places, 717 transitions, 12654 flow [2024-06-20 16:11:46,553 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 421 places, 717 transitions, 12282 flow, removed 56 selfloop flow, removed 6 redundant places. [2024-06-20 16:11:46,561 INFO L231 Difference]: Finished difference. Result has 427 places, 674 transitions, 10561 flow [2024-06-20 16:11:46,561 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9397, PETRI_DIFFERENCE_MINUEND_PLACES=412, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=628, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=546, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=10561, PETRI_PLACES=427, PETRI_TRANSITIONS=674} [2024-06-20 16:11:46,562 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 385 predicate places. [2024-06-20 16:11:46,562 INFO L495 AbstractCegarLoop]: Abstraction has has 427 places, 674 transitions, 10561 flow [2024-06-20 16:11:46,562 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:11:46,562 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:11:46,562 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:11:46,562 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120 [2024-06-20 16:11:46,562 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)] === [2024-06-20 16:11:46,563 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:11:46,563 INFO L85 PathProgramCache]: Analyzing trace with hash 461846972, now seen corresponding path program 2 times [2024-06-20 16:11:46,563 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:11:46,563 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1704463870] [2024-06-20 16:11:46,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:11:46,563 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:11:46,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:11:47,334 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:11:47,334 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:11:47,334 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1704463870] [2024-06-20 16:11:47,334 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1704463870] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:11:47,334 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:11:47,334 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:11:47,334 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [717362513] [2024-06-20 16:11:47,334 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:11:47,335 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:11:47,335 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:11:47,335 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:11:47,335 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:11:47,411 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-20 16:11:47,411 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 427 places, 674 transitions, 10561 flow. Second operand has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:11:47,411 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:11:47,411 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-20 16:11:47,412 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:11:49,561 INFO L124 PetriNetUnfolderBase]: 4804/7576 cut-off events. [2024-06-20 16:11:49,561 INFO L125 PetriNetUnfolderBase]: For 1416066/1416068 co-relation queries the response was YES. [2024-06-20 16:11:49,664 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78944 conditions, 7576 events. 4804/7576 cut-off events. For 1416066/1416068 co-relation queries the response was YES. Maximal size of possible extension queue 452. Compared 46960 event pairs, 840 based on Foata normal form. 6/7581 useless extension candidates. Maximal degree in co-relation 78743. Up to 6953 conditions per place. [2024-06-20 16:11:49,701 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 586 selfloop transitions, 113 changer transitions 0/703 dead transitions. [2024-06-20 16:11:49,702 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 435 places, 703 transitions, 12465 flow [2024-06-20 16:11:49,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:11:49,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:11:49,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 161 transitions. [2024-06-20 16:11:49,702 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4363143631436314 [2024-06-20 16:11:49,703 INFO L175 Difference]: Start difference. First operand has 427 places, 674 transitions, 10561 flow. Second operand 9 states and 161 transitions. [2024-06-20 16:11:49,703 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 435 places, 703 transitions, 12465 flow [2024-06-20 16:11:56,824 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 432 places, 703 transitions, 12238 flow, removed 93 selfloop flow, removed 3 redundant places. [2024-06-20 16:11:56,832 INFO L231 Difference]: Finished difference. Result has 433 places, 679 transitions, 10691 flow [2024-06-20 16:11:56,832 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10334, PETRI_DIFFERENCE_MINUEND_PLACES=424, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=674, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=108, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=566, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10691, PETRI_PLACES=433, PETRI_TRANSITIONS=679} [2024-06-20 16:11:56,833 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 391 predicate places. [2024-06-20 16:11:56,833 INFO L495 AbstractCegarLoop]: Abstraction has has 433 places, 679 transitions, 10691 flow [2024-06-20 16:11:56,833 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:11:56,833 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:11:56,833 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:11:56,833 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121 [2024-06-20 16:11:56,833 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)] === [2024-06-20 16:11:56,833 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:11:56,833 INFO L85 PathProgramCache]: Analyzing trace with hash 1665188290, now seen corresponding path program 4 times [2024-06-20 16:11:56,834 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:11:56,834 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [933805910] [2024-06-20 16:11:56,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:11:56,834 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:11:56,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:11:57,643 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:11:57,643 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:11:57,643 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [933805910] [2024-06-20 16:11:57,643 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [933805910] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:11:57,643 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:11:57,643 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:11:57,643 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [404924056] [2024-06-20 16:11:57,643 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:11:57,644 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:11:57,644 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:11:57,644 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:11:57,644 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:11:57,723 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-20 16:11:57,724 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 433 places, 679 transitions, 10691 flow. Second operand has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:11:57,724 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:11:57,724 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-20 16:11:57,724 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:12:00,008 INFO L124 PetriNetUnfolderBase]: 4824/7601 cut-off events. [2024-06-20 16:12:00,009 INFO L125 PetriNetUnfolderBase]: For 1409997/1409997 co-relation queries the response was YES. [2024-06-20 16:12:00,102 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78938 conditions, 7601 events. 4824/7601 cut-off events. For 1409997/1409997 co-relation queries the response was YES. Maximal size of possible extension queue 454. Compared 47057 event pairs, 833 based on Foata normal form. 1/7601 useless extension candidates. Maximal degree in co-relation 78736. Up to 7202 conditions per place. [2024-06-20 16:12:00,137 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 584 selfloop transitions, 119 changer transitions 0/707 dead transitions. [2024-06-20 16:12:00,137 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 441 places, 707 transitions, 12351 flow [2024-06-20 16:12:00,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:12:00,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:12:00,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 151 transitions. [2024-06-20 16:12:00,138 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4092140921409214 [2024-06-20 16:12:00,138 INFO L175 Difference]: Start difference. First operand has 433 places, 679 transitions, 10691 flow. Second operand 9 states and 151 transitions. [2024-06-20 16:12:00,138 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 441 places, 707 transitions, 12351 flow [2024-06-20 16:12:06,478 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 435 places, 707 transitions, 12127 flow, removed 34 selfloop flow, removed 6 redundant places. [2024-06-20 16:12:06,487 INFO L231 Difference]: Finished difference. Result has 436 places, 691 transitions, 10925 flow [2024-06-20 16:12:06,487 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10467, PETRI_DIFFERENCE_MINUEND_PLACES=427, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=679, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=107, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=569, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10925, PETRI_PLACES=436, PETRI_TRANSITIONS=691} [2024-06-20 16:12:06,487 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 394 predicate places. [2024-06-20 16:12:06,487 INFO L495 AbstractCegarLoop]: Abstraction has has 436 places, 691 transitions, 10925 flow [2024-06-20 16:12:06,487 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:12:06,487 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:12:06,487 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:12:06,487 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122 [2024-06-20 16:12:06,488 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)] === [2024-06-20 16:12:06,488 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:12:06,488 INFO L85 PathProgramCache]: Analyzing trace with hash 1079034957, now seen corresponding path program 2 times [2024-06-20 16:12:06,488 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:12:06,488 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1049789494] [2024-06-20 16:12:06,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:12:06,488 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:12:06,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:12:07,160 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:12:07,160 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:12:07,160 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1049789494] [2024-06-20 16:12:07,160 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1049789494] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:12:07,161 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:12:07,161 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:12:07,161 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [249897939] [2024-06-20 16:12:07,161 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:12:07,161 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:12:07,161 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:12:07,161 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:12:07,161 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:12:07,228 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-20 16:12:07,228 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 436 places, 691 transitions, 10925 flow. Second operand has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:12:07,228 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:12:07,228 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-20 16:12:07,228 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:12:09,438 INFO L124 PetriNetUnfolderBase]: 4864/7664 cut-off events. [2024-06-20 16:12:09,438 INFO L125 PetriNetUnfolderBase]: For 1492446/1492448 co-relation queries the response was YES. [2024-06-20 16:12:09,534 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79916 conditions, 7664 events. 4864/7664 cut-off events. For 1492446/1492448 co-relation queries the response was YES. Maximal size of possible extension queue 457. Compared 47535 event pairs, 838 based on Foata normal form. 10/7673 useless extension candidates. Maximal degree in co-relation 79713. Up to 7325 conditions per place. [2024-06-20 16:12:09,570 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 650 selfloop transitions, 62 changer transitions 0/716 dead transitions. [2024-06-20 16:12:09,570 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 444 places, 716 transitions, 12599 flow [2024-06-20 16:12:09,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:12:09,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:12:09,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 152 transitions. [2024-06-20 16:12:09,571 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41192411924119243 [2024-06-20 16:12:09,571 INFO L175 Difference]: Start difference. First operand has 436 places, 691 transitions, 10925 flow. Second operand 9 states and 152 transitions. [2024-06-20 16:12:09,571 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 444 places, 716 transitions, 12599 flow [2024-06-20 16:12:16,391 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 439 places, 716 transitions, 12328 flow, removed 44 selfloop flow, removed 5 redundant places. [2024-06-20 16:12:16,399 INFO L231 Difference]: Finished difference. Result has 440 places, 698 transitions, 10968 flow [2024-06-20 16:12:16,399 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10654, PETRI_DIFFERENCE_MINUEND_PLACES=431, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=691, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=631, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10968, PETRI_PLACES=440, PETRI_TRANSITIONS=698} [2024-06-20 16:12:16,399 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 398 predicate places. [2024-06-20 16:12:16,399 INFO L495 AbstractCegarLoop]: Abstraction has has 440 places, 698 transitions, 10968 flow [2024-06-20 16:12:16,399 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:12:16,399 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:12:16,400 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:12:16,400 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123 [2024-06-20 16:12:16,400 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)] === [2024-06-20 16:12:16,400 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:12:16,400 INFO L85 PathProgramCache]: Analyzing trace with hash 1632582535, now seen corresponding path program 3 times [2024-06-20 16:12:16,400 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:12:16,400 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1365449005] [2024-06-20 16:12:16,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:12:16,400 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:12:16,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:12:17,136 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:12:17,137 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:12:17,137 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1365449005] [2024-06-20 16:12:17,137 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1365449005] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:12:17,137 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:12:17,137 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:12:17,137 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [866259001] [2024-06-20 16:12:17,137 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:12:17,137 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:12:17,137 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:12:17,137 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:12:17,137 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:12:17,202 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-20 16:12:17,202 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 440 places, 698 transitions, 10968 flow. Second operand has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:12:17,202 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:12:17,202 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-20 16:12:17,202 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:12:19,350 INFO L124 PetriNetUnfolderBase]: 4968/7812 cut-off events. [2024-06-20 16:12:19,350 INFO L125 PetriNetUnfolderBase]: For 1596180/1596182 co-relation queries the response was YES. [2024-06-20 16:12:19,460 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83666 conditions, 7812 events. 4968/7812 cut-off events. For 1596180/1596182 co-relation queries the response was YES. Maximal size of possible extension queue 463. Compared 48414 event pairs, 859 based on Foata normal form. 10/7821 useless extension candidates. Maximal degree in co-relation 83462. Up to 7345 conditions per place. [2024-06-20 16:12:19,499 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 648 selfloop transitions, 79 changer transitions 0/731 dead transitions. [2024-06-20 16:12:19,499 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 448 places, 731 transitions, 13140 flow [2024-06-20 16:12:19,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:12:19,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:12:19,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 160 transitions. [2024-06-20 16:12:19,500 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43360433604336046 [2024-06-20 16:12:19,500 INFO L175 Difference]: Start difference. First operand has 440 places, 698 transitions, 10968 flow. Second operand 9 states and 160 transitions. [2024-06-20 16:12:19,500 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 448 places, 731 transitions, 13140 flow [2024-06-20 16:12:25,453 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 443 places, 731 transitions, 12908 flow, removed 76 selfloop flow, removed 5 redundant places. [2024-06-20 16:12:25,461 INFO L231 Difference]: Finished difference. Result has 444 places, 708 transitions, 11236 flow [2024-06-20 16:12:25,461 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10736, PETRI_DIFFERENCE_MINUEND_PLACES=435, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=698, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=624, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11236, PETRI_PLACES=444, PETRI_TRANSITIONS=708} [2024-06-20 16:12:25,462 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 402 predicate places. [2024-06-20 16:12:25,462 INFO L495 AbstractCegarLoop]: Abstraction has has 444 places, 708 transitions, 11236 flow [2024-06-20 16:12:25,462 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:12:25,462 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:12:25,462 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:12:25,462 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable124 [2024-06-20 16:12:25,462 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)] === [2024-06-20 16:12:25,463 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:12:25,463 INFO L85 PathProgramCache]: Analyzing trace with hash 801068330, now seen corresponding path program 3 times [2024-06-20 16:12:25,463 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:12:25,463 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1150097916] [2024-06-20 16:12:25,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:12:25,463 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:12:25,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:12:26,285 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:12:26,285 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:12:26,285 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1150097916] [2024-06-20 16:12:26,286 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1150097916] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:12:26,286 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:12:26,286 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:12:26,286 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1960859975] [2024-06-20 16:12:26,286 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:12:26,286 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:12:26,286 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:12:26,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:12:26,286 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:12:26,378 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-20 16:12:26,379 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 444 places, 708 transitions, 11236 flow. Second operand has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:12:26,379 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:12:26,379 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-20 16:12:26,379 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:12:28,965 INFO L124 PetriNetUnfolderBase]: 4978/7842 cut-off events. [2024-06-20 16:12:28,965 INFO L125 PetriNetUnfolderBase]: For 1573426/1573428 co-relation queries the response was YES. [2024-06-20 16:12:29,053 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83974 conditions, 7842 events. 4978/7842 cut-off events. For 1573426/1573428 co-relation queries the response was YES. Maximal size of possible extension queue 466. Compared 48801 event pairs, 857 based on Foata normal form. 4/7845 useless extension candidates. Maximal degree in co-relation 83769. Up to 7502 conditions per place. [2024-06-20 16:12:29,088 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 677 selfloop transitions, 56 changer transitions 0/737 dead transitions. [2024-06-20 16:12:29,088 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 453 places, 737 transitions, 13030 flow [2024-06-20 16:12:29,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 16:12:29,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 16:12:29,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 163 transitions. [2024-06-20 16:12:29,089 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3975609756097561 [2024-06-20 16:12:29,089 INFO L175 Difference]: Start difference. First operand has 444 places, 708 transitions, 11236 flow. Second operand 10 states and 163 transitions. [2024-06-20 16:12:29,089 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 453 places, 737 transitions, 13030 flow [2024-06-20 16:12:35,053 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 448 places, 737 transitions, 12790 flow, removed 85 selfloop flow, removed 5 redundant places. [2024-06-20 16:12:35,061 INFO L231 Difference]: Finished difference. Result has 451 places, 719 transitions, 11359 flow [2024-06-20 16:12:35,062 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=11000, PETRI_DIFFERENCE_MINUEND_PLACES=439, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=708, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=652, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=11359, PETRI_PLACES=451, PETRI_TRANSITIONS=719} [2024-06-20 16:12:35,062 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 409 predicate places. [2024-06-20 16:12:35,062 INFO L495 AbstractCegarLoop]: Abstraction has has 451 places, 719 transitions, 11359 flow [2024-06-20 16:12:35,062 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:12:35,062 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:12:35,062 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:12:35,062 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable125 [2024-06-20 16:12:35,062 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)] === [2024-06-20 16:12:35,063 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:12:35,063 INFO L85 PathProgramCache]: Analyzing trace with hash -1375942970, now seen corresponding path program 5 times [2024-06-20 16:12:35,063 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:12:35,063 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [683917676] [2024-06-20 16:12:35,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:12:35,063 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:12:35,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:12:36,029 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:12:36,030 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:12:36,030 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [683917676] [2024-06-20 16:12:36,030 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [683917676] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:12:36,030 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:12:36,030 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:12:36,030 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1747636044] [2024-06-20 16:12:36,030 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:12:36,030 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:12:36,031 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:12:36,031 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:12:36,031 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:12:36,175 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-20 16:12:36,175 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 451 places, 719 transitions, 11359 flow. Second operand has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:12:36,175 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:12:36,175 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-20 16:12:36,175 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:12:38,468 INFO L124 PetriNetUnfolderBase]: 4991/7841 cut-off events. [2024-06-20 16:12:38,469 INFO L125 PetriNetUnfolderBase]: For 1585838/1585838 co-relation queries the response was YES. [2024-06-20 16:12:38,579 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83869 conditions, 7841 events. 4991/7841 cut-off events. For 1585838/1585838 co-relation queries the response was YES. Maximal size of possible extension queue 470. Compared 48584 event pairs, 850 based on Foata normal form. 1/7841 useless extension candidates. Maximal degree in co-relation 83660. Up to 7416 conditions per place. [2024-06-20 16:12:38,616 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 619 selfloop transitions, 119 changer transitions 0/742 dead transitions. [2024-06-20 16:12:38,616 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 459 places, 742 transitions, 13351 flow [2024-06-20 16:12:38,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:12:38,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:12:38,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 154 transitions. [2024-06-20 16:12:38,617 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4173441734417344 [2024-06-20 16:12:38,617 INFO L175 Difference]: Start difference. First operand has 451 places, 719 transitions, 11359 flow. Second operand 9 states and 154 transitions. [2024-06-20 16:12:38,617 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 459 places, 742 transitions, 13351 flow [2024-06-20 16:12:46,582 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 455 places, 742 transitions, 13244 flow, removed 18 selfloop flow, removed 4 redundant places. [2024-06-20 16:12:46,590 INFO L231 Difference]: Finished difference. Result has 456 places, 725 transitions, 11718 flow [2024-06-20 16:12:46,590 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=11252, PETRI_DIFFERENCE_MINUEND_PLACES=447, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=719, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=116, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=603, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11718, PETRI_PLACES=456, PETRI_TRANSITIONS=725} [2024-06-20 16:12:46,590 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 414 predicate places. [2024-06-20 16:12:46,590 INFO L495 AbstractCegarLoop]: Abstraction has has 456 places, 725 transitions, 11718 flow [2024-06-20 16:12:46,591 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:12:46,591 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:12:46,591 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:12:46,591 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126 [2024-06-20 16:12:46,591 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)] === [2024-06-20 16:12:46,591 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:12:46,592 INFO L85 PathProgramCache]: Analyzing trace with hash 808420197, now seen corresponding path program 4 times [2024-06-20 16:12:46,592 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:12:46,592 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [840730347] [2024-06-20 16:12:46,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:12:46,592 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:12:46,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:12:47,406 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:12:47,406 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:12:47,406 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [840730347] [2024-06-20 16:12:47,406 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [840730347] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:12:47,407 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:12:47,407 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:12:47,407 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [216122462] [2024-06-20 16:12:47,407 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:12:47,407 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:12:47,407 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:12:47,408 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:12:47,408 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:12:47,475 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-20 16:12:47,475 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 456 places, 725 transitions, 11718 flow. Second operand has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:12:47,475 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:12:47,475 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-20 16:12:47,475 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:12:49,729 INFO L124 PetriNetUnfolderBase]: 4967/7804 cut-off events. [2024-06-20 16:12:49,729 INFO L125 PetriNetUnfolderBase]: For 1604161/1604163 co-relation queries the response was YES. [2024-06-20 16:12:49,835 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82848 conditions, 7804 events. 4967/7804 cut-off events. For 1604161/1604163 co-relation queries the response was YES. Maximal size of possible extension queue 469. Compared 48296 event pairs, 839 based on Foata normal form. 10/7813 useless extension candidates. Maximal degree in co-relation 82638. Up to 7423 conditions per place. [2024-06-20 16:12:49,873 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 671 selfloop transitions, 70 changer transitions 0/745 dead transitions. [2024-06-20 16:12:49,873 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 464 places, 745 transitions, 13312 flow [2024-06-20 16:12:49,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:12:49,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:12:49,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 156 transitions. [2024-06-20 16:12:49,874 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42276422764227645 [2024-06-20 16:12:49,874 INFO L175 Difference]: Start difference. First operand has 456 places, 725 transitions, 11718 flow. Second operand 9 states and 156 transitions. [2024-06-20 16:12:49,874 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 464 places, 745 transitions, 13312 flow [2024-06-20 16:12:57,725 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 459 places, 745 transitions, 12956 flow, removed 98 selfloop flow, removed 5 redundant places. [2024-06-20 16:12:57,733 INFO L231 Difference]: Finished difference. Result has 460 places, 725 transitions, 11511 flow [2024-06-20 16:12:57,734 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=11362, PETRI_DIFFERENCE_MINUEND_PLACES=451, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=725, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=655, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11511, PETRI_PLACES=460, PETRI_TRANSITIONS=725} [2024-06-20 16:12:57,734 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 418 predicate places. [2024-06-20 16:12:57,734 INFO L495 AbstractCegarLoop]: Abstraction has has 460 places, 725 transitions, 11511 flow [2024-06-20 16:12:57,734 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:12:57,734 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:12:57,735 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:12:57,735 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127 [2024-06-20 16:12:57,735 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)] === [2024-06-20 16:12:57,735 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:12:57,735 INFO L85 PathProgramCache]: Analyzing trace with hash 808419980, now seen corresponding path program 4 times [2024-06-20 16:12:57,735 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:12:57,736 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [46240012] [2024-06-20 16:12:57,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:12:57,736 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:12:57,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:12:58,443 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:12:58,444 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:12:58,444 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [46240012] [2024-06-20 16:12:58,444 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [46240012] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:12:58,444 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:12:58,444 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:12:58,444 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [239297904] [2024-06-20 16:12:58,444 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:12:58,444 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:12:58,445 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:12:58,445 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:12:58,445 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:12:58,552 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-20 16:12:58,552 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 460 places, 725 transitions, 11511 flow. Second operand has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:12:58,553 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:12:58,553 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-20 16:12:58,553 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:13:01,121 INFO L124 PetriNetUnfolderBase]: 4987/7848 cut-off events. [2024-06-20 16:13:01,121 INFO L125 PetriNetUnfolderBase]: For 1588087/1588089 co-relation queries the response was YES. [2024-06-20 16:13:01,232 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83015 conditions, 7848 events. 4987/7848 cut-off events. For 1588087/1588089 co-relation queries the response was YES. Maximal size of possible extension queue 471. Compared 48776 event pairs, 850 based on Foata normal form. 6/7853 useless extension candidates. Maximal degree in co-relation 82803. Up to 7518 conditions per place. [2024-06-20 16:13:01,272 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 688 selfloop transitions, 56 changer transitions 0/748 dead transitions. [2024-06-20 16:13:01,273 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 468 places, 748 transitions, 13228 flow [2024-06-20 16:13:01,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:13:01,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:13:01,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 150 transitions. [2024-06-20 16:13:01,273 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4065040650406504 [2024-06-20 16:13:01,273 INFO L175 Difference]: Start difference. First operand has 460 places, 725 transitions, 11511 flow. Second operand 9 states and 150 transitions. [2024-06-20 16:13:01,273 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 468 places, 748 transitions, 13228 flow [2024-06-20 16:13:08,614 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 460 places, 748 transitions, 13030 flow, removed 16 selfloop flow, removed 8 redundant places. [2024-06-20 16:13:08,623 INFO L231 Difference]: Finished difference. Result has 461 places, 730 transitions, 11577 flow [2024-06-20 16:13:08,623 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=11313, PETRI_DIFFERENCE_MINUEND_PLACES=452, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=725, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=669, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11577, PETRI_PLACES=461, PETRI_TRANSITIONS=730} [2024-06-20 16:13:08,623 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 419 predicate places. [2024-06-20 16:13:08,624 INFO L495 AbstractCegarLoop]: Abstraction has has 461 places, 730 transitions, 11577 flow [2024-06-20 16:13:08,624 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:13:08,624 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:13:08,624 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:13:08,624 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable128 [2024-06-20 16:13:08,624 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)] === [2024-06-20 16:13:08,624 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:13:08,624 INFO L85 PathProgramCache]: Analyzing trace with hash 1629089052, now seen corresponding path program 6 times [2024-06-20 16:13:08,624 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:13:08,624 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [388933825] [2024-06-20 16:13:08,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:13:08,625 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:13:08,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:13:09,453 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:13:09,453 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:13:09,454 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [388933825] [2024-06-20 16:13:09,454 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [388933825] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:13:09,454 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:13:09,454 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:13:09,454 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [590671323] [2024-06-20 16:13:09,454 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:13:09,454 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:13:09,454 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:13:09,454 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:13:09,454 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:13:09,549 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-20 16:13:09,549 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 461 places, 730 transitions, 11577 flow. Second operand has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:13:09,549 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:13:09,549 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-20 16:13:09,549 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:13:11,878 INFO L124 PetriNetUnfolderBase]: 4984/7833 cut-off events. [2024-06-20 16:13:11,878 INFO L125 PetriNetUnfolderBase]: For 1570995/1570995 co-relation queries the response was YES. [2024-06-20 16:13:11,986 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82856 conditions, 7833 events. 4984/7833 cut-off events. For 1570995/1570995 co-relation queries the response was YES. Maximal size of possible extension queue 471. Compared 48496 event pairs, 846 based on Foata normal form. 1/7833 useless extension candidates. Maximal degree in co-relation 82643. Up to 7426 conditions per place. [2024-06-20 16:13:12,020 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 629 selfloop transitions, 113 changer transitions 0/746 dead transitions. [2024-06-20 16:13:12,020 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 469 places, 746 transitions, 13109 flow [2024-06-20 16:13:12,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:13:12,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:13:12,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 152 transitions. [2024-06-20 16:13:12,021 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41192411924119243 [2024-06-20 16:13:12,021 INFO L175 Difference]: Start difference. First operand has 461 places, 730 transitions, 11577 flow. Second operand 9 states and 152 transitions. [2024-06-20 16:13:12,021 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 469 places, 746 transitions, 13109 flow [2024-06-20 16:13:21,701 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 463 places, 746 transitions, 12880 flow, removed 68 selfloop flow, removed 6 redundant places. [2024-06-20 16:13:21,709 INFO L231 Difference]: Finished difference. Result has 464 places, 730 transitions, 11582 flow [2024-06-20 16:13:21,709 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=11348, PETRI_DIFFERENCE_MINUEND_PLACES=455, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=730, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=113, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=617, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11582, PETRI_PLACES=464, PETRI_TRANSITIONS=730} [2024-06-20 16:13:21,709 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 422 predicate places. [2024-06-20 16:13:21,709 INFO L495 AbstractCegarLoop]: Abstraction has has 464 places, 730 transitions, 11582 flow [2024-06-20 16:13:21,709 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:13:21,710 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:13:21,710 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:13:21,710 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable129 [2024-06-20 16:13:21,710 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)] === [2024-06-20 16:13:21,710 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:13:21,710 INFO L85 PathProgramCache]: Analyzing trace with hash -1005400594, now seen corresponding path program 1 times [2024-06-20 16:13:21,710 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:13:21,710 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [372994740] [2024-06-20 16:13:21,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:13:21,711 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:13:21,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:13:22,777 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:13:22,778 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:13:22,778 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [372994740] [2024-06-20 16:13:22,778 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [372994740] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:13:22,778 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:13:22,778 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:13:22,778 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [103094486] [2024-06-20 16:13:22,778 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:13:22,778 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:13:22,778 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:13:22,778 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:13:22,778 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:13:22,896 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-20 16:13:22,896 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 464 places, 730 transitions, 11582 flow. Second operand has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:13:22,896 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:13:22,896 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-20 16:13:22,896 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:13:25,545 INFO L124 PetriNetUnfolderBase]: 4992/7846 cut-off events. [2024-06-20 16:13:25,545 INFO L125 PetriNetUnfolderBase]: For 1600812/1600814 co-relation queries the response was YES. [2024-06-20 16:13:25,722 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83066 conditions, 7846 events. 4992/7846 cut-off events. For 1600812/1600814 co-relation queries the response was YES. Maximal size of possible extension queue 470. Compared 48434 event pairs, 708 based on Foata normal form. 4/7849 useless extension candidates. Maximal degree in co-relation 82852. Up to 7265 conditions per place. [2024-06-20 16:13:25,760 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 637 selfloop transitions, 121 changer transitions 0/762 dead transitions. [2024-06-20 16:13:25,760 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 472 places, 762 transitions, 13498 flow [2024-06-20 16:13:25,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:13:25,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:13:25,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 162 transitions. [2024-06-20 16:13:25,761 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43902439024390244 [2024-06-20 16:13:25,761 INFO L175 Difference]: Start difference. First operand has 464 places, 730 transitions, 11582 flow. Second operand 9 states and 162 transitions. [2024-06-20 16:13:25,761 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 472 places, 762 transitions, 13498 flow [2024-06-20 16:13:34,284 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 464 places, 762 transitions, 13231 flow, removed 6 selfloop flow, removed 8 redundant places. [2024-06-20 16:13:34,293 INFO L231 Difference]: Finished difference. Result has 465 places, 734 transitions, 11622 flow [2024-06-20 16:13:34,293 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=11315, PETRI_DIFFERENCE_MINUEND_PLACES=456, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=730, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=119, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=611, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11622, PETRI_PLACES=465, PETRI_TRANSITIONS=734} [2024-06-20 16:13:34,293 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 423 predicate places. [2024-06-20 16:13:34,294 INFO L495 AbstractCegarLoop]: Abstraction has has 465 places, 734 transitions, 11622 flow [2024-06-20 16:13:34,294 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:13:34,294 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:13:34,294 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:13:34,294 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130 [2024-06-20 16:13:34,294 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)] === [2024-06-20 16:13:34,294 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:13:34,294 INFO L85 PathProgramCache]: Analyzing trace with hash 1325187008, now seen corresponding path program 2 times [2024-06-20 16:13:34,295 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:13:34,295 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1372994876] [2024-06-20 16:13:34,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:13:34,295 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:13:34,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:13:35,321 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:13:35,321 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:13:35,321 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1372994876] [2024-06-20 16:13:35,321 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1372994876] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:13:35,321 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:13:35,321 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:13:35,321 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [735208862] [2024-06-20 16:13:35,321 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:13:35,321 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:13:35,321 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:13:35,322 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:13:35,322 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:13:35,418 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-20 16:13:35,418 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 465 places, 734 transitions, 11622 flow. Second operand has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:13:35,418 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:13:35,418 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-20 16:13:35,418 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:13:38,129 INFO L124 PetriNetUnfolderBase]: 5013/7877 cut-off events. [2024-06-20 16:13:38,129 INFO L125 PetriNetUnfolderBase]: For 1640566/1640568 co-relation queries the response was YES. [2024-06-20 16:13:38,231 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83850 conditions, 7877 events. 5013/7877 cut-off events. For 1640566/1640568 co-relation queries the response was YES. Maximal size of possible extension queue 474. Compared 48831 event pairs, 845 based on Foata normal form. 4/7880 useless extension candidates. Maximal degree in co-relation 83635. Up to 7399 conditions per place. [2024-06-20 16:13:38,264 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 631 selfloop transitions, 127 changer transitions 0/762 dead transitions. [2024-06-20 16:13:38,265 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 473 places, 762 transitions, 13534 flow [2024-06-20 16:13:38,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:13:38,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:13:38,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 159 transitions. [2024-06-20 16:13:38,265 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43089430894308944 [2024-06-20 16:13:38,266 INFO L175 Difference]: Start difference. First operand has 465 places, 734 transitions, 11622 flow. Second operand 9 states and 159 transitions. [2024-06-20 16:13:38,266 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 473 places, 762 transitions, 13534 flow [2024-06-20 16:13:47,185 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 468 places, 762 transitions, 13347 flow, removed 31 selfloop flow, removed 5 redundant places. [2024-06-20 16:13:47,194 INFO L231 Difference]: Finished difference. Result has 469 places, 738 transitions, 11767 flow [2024-06-20 16:13:47,194 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=11459, PETRI_DIFFERENCE_MINUEND_PLACES=460, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=734, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=125, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=609, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11767, PETRI_PLACES=469, PETRI_TRANSITIONS=738} [2024-06-20 16:13:47,195 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 427 predicate places. [2024-06-20 16:13:47,195 INFO L495 AbstractCegarLoop]: Abstraction has has 469 places, 738 transitions, 11767 flow [2024-06-20 16:13:47,195 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:13:47,195 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:13:47,195 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:13:47,195 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131 [2024-06-20 16:13:47,195 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)] === [2024-06-20 16:13:47,196 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:13:47,196 INFO L85 PathProgramCache]: Analyzing trace with hash 493999450, now seen corresponding path program 3 times [2024-06-20 16:13:47,196 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:13:47,196 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [638415047] [2024-06-20 16:13:47,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:13:47,196 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:13:47,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:13:48,136 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:13:48,136 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:13:48,136 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [638415047] [2024-06-20 16:13:48,136 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [638415047] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:13:48,136 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:13:48,136 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:13:48,137 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1140325054] [2024-06-20 16:13:48,137 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:13:48,137 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:13:48,137 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:13:48,137 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:13:48,137 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:13:48,222 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-20 16:13:48,222 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 469 places, 738 transitions, 11767 flow. Second operand has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:13:48,222 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:13:48,222 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-20 16:13:48,222 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:13:51,047 INFO L124 PetriNetUnfolderBase]: 5008/7870 cut-off events. [2024-06-20 16:13:51,048 INFO L125 PetriNetUnfolderBase]: For 1646274/1646276 co-relation queries the response was YES. [2024-06-20 16:13:51,145 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83859 conditions, 7870 events. 5008/7870 cut-off events. For 1646274/1646276 co-relation queries the response was YES. Maximal size of possible extension queue 474. Compared 48788 event pairs, 849 based on Foata normal form. 4/7873 useless extension candidates. Maximal degree in co-relation 83642. Up to 7459 conditions per place. [2024-06-20 16:13:51,177 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 637 selfloop transitions, 119 changer transitions 0/760 dead transitions. [2024-06-20 16:13:51,177 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 477 places, 760 transitions, 13347 flow [2024-06-20 16:13:51,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:13:51,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:13:51,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 156 transitions. [2024-06-20 16:13:51,178 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42276422764227645 [2024-06-20 16:13:51,178 INFO L175 Difference]: Start difference. First operand has 469 places, 738 transitions, 11767 flow. Second operand 9 states and 156 transitions. [2024-06-20 16:13:51,178 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 477 places, 760 transitions, 13347 flow [2024-06-20 16:13:59,656 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 472 places, 760 transitions, 13191 flow, removed 11 selfloop flow, removed 5 redundant places. [2024-06-20 16:13:59,665 INFO L231 Difference]: Finished difference. Result has 473 places, 738 transitions, 11856 flow [2024-06-20 16:13:59,665 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=11611, PETRI_DIFFERENCE_MINUEND_PLACES=464, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=738, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=119, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=619, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11856, PETRI_PLACES=473, PETRI_TRANSITIONS=738} [2024-06-20 16:13:59,665 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 431 predicate places. [2024-06-20 16:13:59,665 INFO L495 AbstractCegarLoop]: Abstraction has has 473 places, 738 transitions, 11856 flow [2024-06-20 16:13:59,666 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:13:59,666 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:13:59,666 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:13:59,666 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132 [2024-06-20 16:13:59,666 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)] === [2024-06-20 16:13:59,666 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:13:59,666 INFO L85 PathProgramCache]: Analyzing trace with hash 797572088, now seen corresponding path program 4 times [2024-06-20 16:13:59,666 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:13:59,667 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [648920876] [2024-06-20 16:13:59,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:13:59,667 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:13:59,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:14:00,664 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:14:00,664 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:14:00,664 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [648920876] [2024-06-20 16:14:00,664 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [648920876] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:14:00,664 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:14:00,664 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:14:00,665 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1605085652] [2024-06-20 16:14:00,665 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:14:00,665 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:14:00,665 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:14:00,665 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:14:00,665 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:14:00,758 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-20 16:14:00,758 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 473 places, 738 transitions, 11856 flow. Second operand has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:14:00,758 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:14:00,758 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-20 16:14:00,758 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:14:03,661 INFO L124 PetriNetUnfolderBase]: 5016/7877 cut-off events. [2024-06-20 16:14:03,661 INFO L125 PetriNetUnfolderBase]: For 1669777/1669777 co-relation queries the response was YES. [2024-06-20 16:14:03,768 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84289 conditions, 7877 events. 5016/7877 cut-off events. For 1669777/1669777 co-relation queries the response was YES. Maximal size of possible extension queue 477. Compared 48769 event pairs, 841 based on Foata normal form. 2/7878 useless extension candidates. Maximal degree in co-relation 84070. Up to 7471 conditions per place. [2024-06-20 16:14:03,800 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 641 selfloop transitions, 112 changer transitions 0/757 dead transitions. [2024-06-20 16:14:03,801 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 481 places, 757 transitions, 13436 flow [2024-06-20 16:14:03,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:14:03,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:14:03,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 152 transitions. [2024-06-20 16:14:03,802 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41192411924119243 [2024-06-20 16:14:03,802 INFO L175 Difference]: Start difference. First operand has 473 places, 738 transitions, 11856 flow. Second operand 9 states and 152 transitions. [2024-06-20 16:14:03,802 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 481 places, 757 transitions, 13436 flow [2024-06-20 16:14:14,548 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 472 places, 757 transitions, 13128 flow, removed 1 selfloop flow, removed 9 redundant places. [2024-06-20 16:14:14,562 INFO L231 Difference]: Finished difference. Result has 473 places, 740 transitions, 11807 flow [2024-06-20 16:14:14,562 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=11548, PETRI_DIFFERENCE_MINUEND_PLACES=464, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=738, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=110, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=626, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11807, PETRI_PLACES=473, PETRI_TRANSITIONS=740} [2024-06-20 16:14:14,562 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 431 predicate places. [2024-06-20 16:14:14,562 INFO L495 AbstractCegarLoop]: Abstraction has has 473 places, 740 transitions, 11807 flow [2024-06-20 16:14:14,562 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:14:14,562 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:14:14,562 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:14:14,562 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable133 [2024-06-20 16:14:14,563 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)] === [2024-06-20 16:14:14,563 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:14:14,563 INFO L85 PathProgramCache]: Analyzing trace with hash 797245658, now seen corresponding path program 5 times [2024-06-20 16:14:14,563 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:14:14,563 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [103616731] [2024-06-20 16:14:14,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:14:14,563 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:14:14,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:14:15,551 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:14:15,551 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:14:15,552 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [103616731] [2024-06-20 16:14:15,552 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [103616731] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:14:15,552 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:14:15,552 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:14:15,552 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [550243836] [2024-06-20 16:14:15,552 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:14:15,552 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:14:15,552 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:14:15,552 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:14:15,553 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:14:15,659 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-20 16:14:15,659 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 473 places, 740 transitions, 11807 flow. Second operand has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:14:15,659 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:14:15,660 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-20 16:14:15,660 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:14:18,418 INFO L124 PetriNetUnfolderBase]: 5037/7906 cut-off events. [2024-06-20 16:14:18,418 INFO L125 PetriNetUnfolderBase]: For 1710684/1710684 co-relation queries the response was YES. [2024-06-20 16:14:18,527 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84867 conditions, 7906 events. 5037/7906 cut-off events. For 1710684/1710684 co-relation queries the response was YES. Maximal size of possible extension queue 480. Compared 48978 event pairs, 840 based on Foata normal form. 2/7907 useless extension candidates. Maximal degree in co-relation 84647. Up to 7471 conditions per place. [2024-06-20 16:14:18,568 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 644 selfloop transitions, 115 changer transitions 0/763 dead transitions. [2024-06-20 16:14:18,568 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 481 places, 763 transitions, 13701 flow [2024-06-20 16:14:18,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:14:18,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:14:18,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 154 transitions. [2024-06-20 16:14:18,569 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4173441734417344 [2024-06-20 16:14:18,569 INFO L175 Difference]: Start difference. First operand has 473 places, 740 transitions, 11807 flow. Second operand 9 states and 154 transitions. [2024-06-20 16:14:18,569 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 481 places, 763 transitions, 13701 flow [2024-06-20 16:14:26,038 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 474 places, 763 transitions, 13466 flow, removed 8 selfloop flow, removed 7 redundant places. [2024-06-20 16:14:26,046 INFO L231 Difference]: Finished difference. Result has 475 places, 744 transitions, 11867 flow [2024-06-20 16:14:26,046 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=11572, PETRI_DIFFERENCE_MINUEND_PLACES=466, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=740, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=113, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=627, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11867, PETRI_PLACES=475, PETRI_TRANSITIONS=744} [2024-06-20 16:14:26,047 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 433 predicate places. [2024-06-20 16:14:26,047 INFO L495 AbstractCegarLoop]: Abstraction has has 475 places, 744 transitions, 11867 flow [2024-06-20 16:14:26,047 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:14:26,047 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:14:26,047 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:14:26,047 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable134 [2024-06-20 16:14:26,047 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)] === [2024-06-20 16:14:26,047 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:14:26,047 INFO L85 PathProgramCache]: Analyzing trace with hash 808296848, now seen corresponding path program 6 times [2024-06-20 16:14:26,047 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:14:26,047 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1408085839] [2024-06-20 16:14:26,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:14:26,048 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:14:26,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:14:27,148 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:14:27,149 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:14:27,149 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1408085839] [2024-06-20 16:14:27,149 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1408085839] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:14:27,149 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:14:27,149 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:14:27,149 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1898632978] [2024-06-20 16:14:27,149 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:14:27,149 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:14:27,149 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:14:27,150 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:14:27,150 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:14:27,251 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-20 16:14:27,251 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 475 places, 744 transitions, 11867 flow. Second operand has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:14:27,251 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:14:27,251 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-20 16:14:27,251 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:14:30,495 INFO L124 PetriNetUnfolderBase]: 5032/7903 cut-off events. [2024-06-20 16:14:30,495 INFO L125 PetriNetUnfolderBase]: For 1714829/1714829 co-relation queries the response was YES. [2024-06-20 16:14:30,600 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84754 conditions, 7903 events. 5032/7903 cut-off events. For 1714829/1714829 co-relation queries the response was YES. Maximal size of possible extension queue 480. Compared 48969 event pairs, 848 based on Foata normal form. 2/7904 useless extension candidates. Maximal degree in co-relation 84533. Up to 7495 conditions per place. [2024-06-20 16:14:30,639 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 639 selfloop transitions, 118 changer transitions 0/761 dead transitions. [2024-06-20 16:14:30,639 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 483 places, 761 transitions, 13431 flow [2024-06-20 16:14:30,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:14:30,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:14:30,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 151 transitions. [2024-06-20 16:14:30,640 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4092140921409214 [2024-06-20 16:14:30,640 INFO L175 Difference]: Start difference. First operand has 475 places, 744 transitions, 11867 flow. Second operand 9 states and 151 transitions. [2024-06-20 16:14:30,640 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 483 places, 761 transitions, 13431 flow [2024-06-20 16:14:37,535 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 478 places, 761 transitions, 13271 flow, removed 17 selfloop flow, removed 5 redundant places. [2024-06-20 16:14:37,544 INFO L231 Difference]: Finished difference. Result has 479 places, 744 transitions, 11950 flow [2024-06-20 16:14:37,545 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=11707, PETRI_DIFFERENCE_MINUEND_PLACES=470, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=744, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=118, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=626, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11950, PETRI_PLACES=479, PETRI_TRANSITIONS=744} [2024-06-20 16:14:37,545 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 437 predicate places. [2024-06-20 16:14:37,545 INFO L495 AbstractCegarLoop]: Abstraction has has 479 places, 744 transitions, 11950 flow [2024-06-20 16:14:37,545 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:14:37,545 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:14:37,545 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:14:37,545 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable135 [2024-06-20 16:14:37,546 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)] === [2024-06-20 16:14:37,546 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:14:37,546 INFO L85 PathProgramCache]: Analyzing trace with hash 808697027, now seen corresponding path program 1 times [2024-06-20 16:14:37,546 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:14:37,546 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1435662349] [2024-06-20 16:14:37,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:14:37,546 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:14:37,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:14:38,485 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:14:38,485 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:14:38,485 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1435662349] [2024-06-20 16:14:38,485 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1435662349] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:14:38,485 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:14:38,485 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:14:38,485 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [762750015] [2024-06-20 16:14:38,485 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:14:38,485 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:14:38,486 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:14:38,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:14:38,486 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:14:38,560 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-20 16:14:38,560 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 479 places, 744 transitions, 11950 flow. Second operand has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 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) [2024-06-20 16:14:38,560 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:14:38,560 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-20 16:14:38,560 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:14:41,324 INFO L124 PetriNetUnfolderBase]: 5076/7971 cut-off events. [2024-06-20 16:14:41,324 INFO L125 PetriNetUnfolderBase]: For 1830396/1830396 co-relation queries the response was YES. [2024-06-20 16:14:41,432 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85627 conditions, 7971 events. 5076/7971 cut-off events. For 1830396/1830396 co-relation queries the response was YES. Maximal size of possible extension queue 484. Compared 49447 event pairs, 854 based on Foata normal form. 12/7982 useless extension candidates. Maximal degree in co-relation 85404. Up to 7391 conditions per place. [2024-06-20 16:14:41,466 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 628 selfloop transitions, 139 changer transitions 0/771 dead transitions. [2024-06-20 16:14:41,466 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 487 places, 771 transitions, 13712 flow [2024-06-20 16:14:41,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:14:41,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:14:41,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 161 transitions. [2024-06-20 16:14:41,467 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4363143631436314 [2024-06-20 16:14:41,467 INFO L175 Difference]: Start difference. First operand has 479 places, 744 transitions, 11950 flow. Second operand 9 states and 161 transitions. [2024-06-20 16:14:41,467 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 487 places, 771 transitions, 13712 flow [2024-06-20 16:14:51,294 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 479 places, 771 transitions, 13460 flow, removed 3 selfloop flow, removed 8 redundant places. [2024-06-20 16:14:51,303 INFO L231 Difference]: Finished difference. Result has 480 places, 745 transitions, 12007 flow [2024-06-20 16:14:51,303 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=11698, PETRI_DIFFERENCE_MINUEND_PLACES=471, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=744, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=138, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=605, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=12007, PETRI_PLACES=480, PETRI_TRANSITIONS=745} [2024-06-20 16:14:51,304 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 438 predicate places. [2024-06-20 16:14:51,304 INFO L495 AbstractCegarLoop]: Abstraction has has 480 places, 745 transitions, 12007 flow [2024-06-20 16:14:51,304 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.7) internal successors, (107), 10 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) [2024-06-20 16:14:51,304 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:14:51,304 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:14:51,304 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable136 [2024-06-20 16:14:51,305 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)] === [2024-06-20 16:14:51,305 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:14:51,305 INFO L85 PathProgramCache]: Analyzing trace with hash 1619269069, now seen corresponding path program 3 times [2024-06-20 16:14:51,305 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:14:51,305 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1500397995] [2024-06-20 16:14:51,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:14:51,305 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:14:51,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:14:52,284 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:14:52,284 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:14:52,284 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1500397995] [2024-06-20 16:14:52,284 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1500397995] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:14:52,284 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:14:52,284 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:14:52,284 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [396586187] [2024-06-20 16:14:52,284 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:14:52,284 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:14:52,284 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:14:52,285 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:14:52,285 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:14:52,366 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-20 16:14:52,366 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 480 places, 745 transitions, 12007 flow. Second operand has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:14:52,366 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:14:52,366 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-20 16:14:52,366 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:14:55,080 INFO L124 PetriNetUnfolderBase]: 5089/7996 cut-off events. [2024-06-20 16:14:55,080 INFO L125 PetriNetUnfolderBase]: For 1767755/1767755 co-relation queries the response was YES. [2024-06-20 16:14:55,181 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86408 conditions, 7996 events. 5089/7996 cut-off events. For 1767755/1767755 co-relation queries the response was YES. Maximal size of possible extension queue 486. Compared 49698 event pairs, 879 based on Foata normal form. 1/7996 useless extension candidates. Maximal degree in co-relation 86184. Up to 7380 conditions per place. [2024-06-20 16:14:55,213 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 643 selfloop transitions, 126 changer transitions 0/773 dead transitions. [2024-06-20 16:14:55,213 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 488 places, 773 transitions, 14134 flow [2024-06-20 16:14:55,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:14:55,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:14:55,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 159 transitions. [2024-06-20 16:14:55,214 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43089430894308944 [2024-06-20 16:14:55,214 INFO L175 Difference]: Start difference. First operand has 480 places, 745 transitions, 12007 flow. Second operand 9 states and 159 transitions. [2024-06-20 16:14:55,214 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 488 places, 773 transitions, 14134 flow [2024-06-20 16:15:04,825 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 481 places, 773 transitions, 13855 flow, removed 4 selfloop flow, removed 7 redundant places. [2024-06-20 16:15:04,834 INFO L231 Difference]: Finished difference. Result has 482 places, 752 transitions, 12243 flow [2024-06-20 16:15:04,834 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=11728, PETRI_DIFFERENCE_MINUEND_PLACES=473, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=745, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=122, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=623, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=12243, PETRI_PLACES=482, PETRI_TRANSITIONS=752} [2024-06-20 16:15:04,834 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 440 predicate places. [2024-06-20 16:15:04,834 INFO L495 AbstractCegarLoop]: Abstraction has has 482 places, 752 transitions, 12243 flow [2024-06-20 16:15:04,835 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:15:04,835 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:15:04,835 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:15:04,835 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137 [2024-06-20 16:15:04,835 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)] === [2024-06-20 16:15:04,835 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:15:04,835 INFO L85 PathProgramCache]: Analyzing trace with hash 444804364, now seen corresponding path program 5 times [2024-06-20 16:15:04,836 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:15:04,836 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [5640919] [2024-06-20 16:15:04,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:15:04,836 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:15:04,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:15:05,637 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:15:05,637 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:15:05,637 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [5640919] [2024-06-20 16:15:05,637 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [5640919] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:15:05,637 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:15:05,637 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:15:05,637 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1968144844] [2024-06-20 16:15:05,637 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:15:05,637 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:15:05,637 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:15:05,638 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:15:05,638 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:15:05,716 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-20 16:15:05,716 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 482 places, 752 transitions, 12243 flow. Second operand has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:15:05,716 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:15:05,716 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-20 16:15:05,716 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:15:08,666 INFO L124 PetriNetUnfolderBase]: 5099/8011 cut-off events. [2024-06-20 16:15:08,666 INFO L125 PetriNetUnfolderBase]: For 1802391/1802395 co-relation queries the response was YES. [2024-06-20 16:15:08,773 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87218 conditions, 8011 events. 5099/8011 cut-off events. For 1802391/1802395 co-relation queries the response was YES. Maximal size of possible extension queue 488. Compared 49842 event pairs, 868 based on Foata normal form. 6/8016 useless extension candidates. Maximal degree in co-relation 86993. Up to 7066 conditions per place. [2024-06-20 16:15:08,806 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 604 selfloop transitions, 170 changer transitions 0/778 dead transitions. [2024-06-20 16:15:08,806 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 490 places, 778 transitions, 14552 flow [2024-06-20 16:15:08,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:15:08,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:15:08,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 163 transitions. [2024-06-20 16:15:08,807 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44173441734417346 [2024-06-20 16:15:08,807 INFO L175 Difference]: Start difference. First operand has 482 places, 752 transitions, 12243 flow. Second operand 9 states and 163 transitions. [2024-06-20 16:15:08,807 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 490 places, 778 transitions, 14552 flow [2024-06-20 16:15:18,077 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 486 places, 778 transitions, 14264 flow, removed 75 selfloop flow, removed 4 redundant places. [2024-06-20 16:15:18,086 INFO L231 Difference]: Finished difference. Result has 487 places, 755 transitions, 12352 flow [2024-06-20 16:15:18,087 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=11955, PETRI_DIFFERENCE_MINUEND_PLACES=478, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=752, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=167, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=585, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=12352, PETRI_PLACES=487, PETRI_TRANSITIONS=755} [2024-06-20 16:15:18,087 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 445 predicate places. [2024-06-20 16:15:18,087 INFO L495 AbstractCegarLoop]: Abstraction has has 487 places, 755 transitions, 12352 flow [2024-06-20 16:15:18,087 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:15:18,087 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:15:18,087 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:15:18,087 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable138 [2024-06-20 16:15:18,087 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)] === [2024-06-20 16:15:18,087 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:15:18,087 INFO L85 PathProgramCache]: Analyzing trace with hash -650567094, now seen corresponding path program 6 times [2024-06-20 16:15:18,087 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:15:18,088 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [821281676] [2024-06-20 16:15:18,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:15:18,088 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:15:18,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:15:18,818 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:15:18,818 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:15:18,818 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [821281676] [2024-06-20 16:15:18,818 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [821281676] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:15:18,819 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:15:18,819 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:15:18,819 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1194307776] [2024-06-20 16:15:18,819 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:15:18,819 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:15:18,819 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:15:18,819 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:15:18,819 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:15:18,901 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-20 16:15:18,902 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 487 places, 755 transitions, 12352 flow. Second operand has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:15:18,902 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:15:18,902 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-20 16:15:18,902 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:15:21,472 INFO L124 PetriNetUnfolderBase]: 5125/8039 cut-off events. [2024-06-20 16:15:21,472 INFO L125 PetriNetUnfolderBase]: For 1850407/1850411 co-relation queries the response was YES. [2024-06-20 16:15:21,579 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88343 conditions, 8039 events. 5125/8039 cut-off events. For 1850407/1850411 co-relation queries the response was YES. Maximal size of possible extension queue 492. Compared 49910 event pairs, 864 based on Foata normal form. 6/8044 useless extension candidates. Maximal degree in co-relation 88116. Up to 7091 conditions per place. [2024-06-20 16:15:21,614 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 599 selfloop transitions, 184 changer transitions 0/787 dead transitions. [2024-06-20 16:15:21,614 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 494 places, 787 transitions, 15034 flow [2024-06-20 16:15:21,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:15:21,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:15:21,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 153 transitions. [2024-06-20 16:15:21,615 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46646341463414637 [2024-06-20 16:15:21,615 INFO L175 Difference]: Start difference. First operand has 487 places, 755 transitions, 12352 flow. Second operand 8 states and 153 transitions. [2024-06-20 16:15:21,615 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 494 places, 787 transitions, 15034 flow [2024-06-20 16:15:30,931 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 487 places, 787 transitions, 14648 flow, removed 17 selfloop flow, removed 7 redundant places. [2024-06-20 16:15:30,940 INFO L231 Difference]: Finished difference. Result has 488 places, 761 transitions, 12456 flow [2024-06-20 16:15:30,940 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=11978, PETRI_DIFFERENCE_MINUEND_PLACES=480, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=755, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=178, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=577, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=12456, PETRI_PLACES=488, PETRI_TRANSITIONS=761} [2024-06-20 16:15:30,941 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 446 predicate places. [2024-06-20 16:15:30,941 INFO L495 AbstractCegarLoop]: Abstraction has has 488 places, 761 transitions, 12456 flow [2024-06-20 16:15:30,941 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:15:30,941 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:15:30,941 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:15:30,941 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable139 [2024-06-20 16:15:30,941 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)] === [2024-06-20 16:15:30,941 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:15:30,941 INFO L85 PathProgramCache]: Analyzing trace with hash 1623084301, now seen corresponding path program 5 times [2024-06-20 16:15:30,941 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:15:30,941 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1111278647] [2024-06-20 16:15:30,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:15:30,942 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:15:30,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:15:31,720 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:15:31,720 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:15:31,720 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1111278647] [2024-06-20 16:15:31,720 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1111278647] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:15:31,720 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:15:31,720 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:15:31,720 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1158278846] [2024-06-20 16:15:31,720 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:15:31,720 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:15:31,721 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:15:31,721 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:15:31,721 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:15:31,789 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-20 16:15:31,789 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 488 places, 761 transitions, 12456 flow. Second operand has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:15:31,789 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:15:31,789 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-20 16:15:31,789 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:15:34,601 INFO L124 PetriNetUnfolderBase]: 5277/8263 cut-off events. [2024-06-20 16:15:34,601 INFO L125 PetriNetUnfolderBase]: For 2086254/2086258 co-relation queries the response was YES. [2024-06-20 16:15:34,754 INFO L83 FinitePrefix]: Finished finitePrefix Result has 93515 conditions, 8263 events. 5277/8263 cut-off events. For 2086254/2086258 co-relation queries the response was YES. Maximal size of possible extension queue 500. Compared 51358 event pairs, 888 based on Foata normal form. 12/8274 useless extension candidates. Maximal degree in co-relation 93287. Up to 6682 conditions per place. [2024-06-20 16:15:34,793 INFO L140 encePairwiseOnDemand]: 27/41 looper letters, 589 selfloop transitions, 206 changer transitions 0/799 dead transitions. [2024-06-20 16:15:34,794 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 496 places, 799 transitions, 15256 flow [2024-06-20 16:15:34,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:15:34,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:15:34,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 170 transitions. [2024-06-20 16:15:34,795 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46070460704607047 [2024-06-20 16:15:34,795 INFO L175 Difference]: Start difference. First operand has 488 places, 761 transitions, 12456 flow. Second operand 9 states and 170 transitions. [2024-06-20 16:15:34,795 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 496 places, 799 transitions, 15256 flow [2024-06-20 16:15:46,547 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 492 places, 799 transitions, 14944 flow, removed 19 selfloop flow, removed 4 redundant places. [2024-06-20 16:15:46,556 INFO L231 Difference]: Finished difference. Result has 493 places, 771 transitions, 12903 flow [2024-06-20 16:15:46,557 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=12144, PETRI_DIFFERENCE_MINUEND_PLACES=484, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=761, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=199, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=561, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=12903, PETRI_PLACES=493, PETRI_TRANSITIONS=771} [2024-06-20 16:15:46,557 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 451 predicate places. [2024-06-20 16:15:46,557 INFO L495 AbstractCegarLoop]: Abstraction has has 493 places, 771 transitions, 12903 flow [2024-06-20 16:15:46,557 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:15:46,557 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:15:46,557 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:15:46,557 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140 [2024-06-20 16:15:46,558 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)] === [2024-06-20 16:15:46,558 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:15:46,558 INFO L85 PathProgramCache]: Analyzing trace with hash 1037917891, now seen corresponding path program 4 times [2024-06-20 16:15:46,558 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:15:46,558 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1587946676] [2024-06-20 16:15:46,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:15:46,558 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:15:46,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:15:47,481 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:15:47,481 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:15:47,481 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1587946676] [2024-06-20 16:15:47,481 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1587946676] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:15:47,481 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:15:47,481 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:15:47,482 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1603645218] [2024-06-20 16:15:47,482 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:15:47,482 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:15:47,482 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:15:47,482 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:15:47,482 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:15:47,555 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-20 16:15:47,555 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 493 places, 771 transitions, 12903 flow. Second operand has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:15:47,555 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:15:47,556 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-20 16:15:47,556 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:15:50,469 INFO L124 PetriNetUnfolderBase]: 5311/8298 cut-off events. [2024-06-20 16:15:50,469 INFO L125 PetriNetUnfolderBase]: For 2103766/2103766 co-relation queries the response was YES. [2024-06-20 16:15:50,583 INFO L83 FinitePrefix]: Finished finitePrefix Result has 95730 conditions, 8298 events. 5311/8298 cut-off events. For 2103766/2103766 co-relation queries the response was YES. Maximal size of possible extension queue 507. Compared 51488 event pairs, 888 based on Foata normal form. 2/8299 useless extension candidates. Maximal degree in co-relation 95501. Up to 7342 conditions per place. [2024-06-20 16:15:50,620 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 589 selfloop transitions, 218 changer transitions 0/811 dead transitions. [2024-06-20 16:15:50,620 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 502 places, 811 transitions, 15742 flow [2024-06-20 16:15:50,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 16:15:50,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 16:15:50,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 183 transitions. [2024-06-20 16:15:50,621 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44634146341463415 [2024-06-20 16:15:50,622 INFO L175 Difference]: Start difference. First operand has 493 places, 771 transitions, 12903 flow. Second operand 10 states and 183 transitions. [2024-06-20 16:15:50,622 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 502 places, 811 transitions, 15742 flow [2024-06-20 16:16:00,074 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 498 places, 811 transitions, 15462 flow, removed 108 selfloop flow, removed 4 redundant places. [2024-06-20 16:16:00,084 INFO L231 Difference]: Finished difference. Result has 500 places, 785 transitions, 13717 flow [2024-06-20 16:16:00,085 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=12629, PETRI_DIFFERENCE_MINUEND_PLACES=489, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=771, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=208, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=560, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=13717, PETRI_PLACES=500, PETRI_TRANSITIONS=785} [2024-06-20 16:16:00,085 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 458 predicate places. [2024-06-20 16:16:00,085 INFO L495 AbstractCegarLoop]: Abstraction has has 500 places, 785 transitions, 13717 flow [2024-06-20 16:16:00,085 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:16:00,085 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:16:00,085 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:16:00,085 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141 [2024-06-20 16:16:00,085 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)] === [2024-06-20 16:16:00,085 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:16:00,085 INFO L85 PathProgramCache]: Analyzing trace with hash 1049345731, now seen corresponding path program 5 times [2024-06-20 16:16:00,086 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:16:00,086 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [761513133] [2024-06-20 16:16:00,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:16:00,086 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:16:00,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:16:00,982 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:16:00,982 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:16:00,982 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [761513133] [2024-06-20 16:16:00,982 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [761513133] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:16:00,982 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:16:00,982 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:16:00,982 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1695056157] [2024-06-20 16:16:00,982 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:16:00,982 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:16:00,982 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:16:00,983 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:16:00,983 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:16:01,064 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-20 16:16:01,064 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 500 places, 785 transitions, 13717 flow. Second operand has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:16:01,064 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:16:01,064 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-20 16:16:01,064 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:16:04,168 INFO L124 PetriNetUnfolderBase]: 5302/8292 cut-off events. [2024-06-20 16:16:04,168 INFO L125 PetriNetUnfolderBase]: For 2107457/2107461 co-relation queries the response was YES. [2024-06-20 16:16:04,293 INFO L83 FinitePrefix]: Finished finitePrefix Result has 95672 conditions, 8292 events. 5302/8292 cut-off events. For 2107457/2107461 co-relation queries the response was YES. Maximal size of possible extension queue 508. Compared 51464 event pairs, 886 based on Foata normal form. 7/8298 useless extension candidates. Maximal degree in co-relation 95440. Up to 7496 conditions per place. [2024-06-20 16:16:04,331 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 620 selfloop transitions, 182 changer transitions 0/806 dead transitions. [2024-06-20 16:16:04,332 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 509 places, 806 transitions, 15682 flow [2024-06-20 16:16:04,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 16:16:04,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 16:16:04,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 175 transitions. [2024-06-20 16:16:04,333 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4268292682926829 [2024-06-20 16:16:04,333 INFO L175 Difference]: Start difference. First operand has 500 places, 785 transitions, 13717 flow. Second operand 10 states and 175 transitions. [2024-06-20 16:16:04,333 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 509 places, 806 transitions, 15682 flow [2024-06-20 16:16:15,401 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 503 places, 806 transitions, 15094 flow, removed 196 selfloop flow, removed 6 redundant places. [2024-06-20 16:16:15,410 INFO L231 Difference]: Finished difference. Result has 504 places, 785 transitions, 13508 flow [2024-06-20 16:16:15,410 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=13131, PETRI_DIFFERENCE_MINUEND_PLACES=494, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=785, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=182, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=603, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=13508, PETRI_PLACES=504, PETRI_TRANSITIONS=785} [2024-06-20 16:16:15,411 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 462 predicate places. [2024-06-20 16:16:15,411 INFO L495 AbstractCegarLoop]: Abstraction has has 504 places, 785 transitions, 13508 flow [2024-06-20 16:16:15,411 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:16:15,411 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:16:15,411 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:16:15,411 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142 [2024-06-20 16:16:15,411 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)] === [2024-06-20 16:16:15,411 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:16:15,411 INFO L85 PathProgramCache]: Analyzing trace with hash 414829760, now seen corresponding path program 7 times [2024-06-20 16:16:15,412 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:16:15,412 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1054754979] [2024-06-20 16:16:15,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:16:15,412 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:16:15,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:16:16,150 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:16:16,150 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:16:16,150 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1054754979] [2024-06-20 16:16:16,151 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1054754979] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:16:16,151 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:16:16,151 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:16:16,151 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1967555216] [2024-06-20 16:16:16,151 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:16:16,151 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:16:16,151 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:16:16,151 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:16:16,151 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:16:16,215 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-20 16:16:16,215 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 504 places, 785 transitions, 13508 flow. Second operand has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:16:16,215 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:16:16,215 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-20 16:16:16,215 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:16:19,061 INFO L124 PetriNetUnfolderBase]: 5312/8300 cut-off events. [2024-06-20 16:16:19,061 INFO L125 PetriNetUnfolderBase]: For 2084132/2084136 co-relation queries the response was YES. [2024-06-20 16:16:19,179 INFO L83 FinitePrefix]: Finished finitePrefix Result has 95143 conditions, 8300 events. 5312/8300 cut-off events. For 2084132/2084136 co-relation queries the response was YES. Maximal size of possible extension queue 509. Compared 51490 event pairs, 868 based on Foata normal form. 6/8305 useless extension candidates. Maximal degree in co-relation 94910. Up to 7346 conditions per place. [2024-06-20 16:16:19,216 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 593 selfloop transitions, 216 changer transitions 0/813 dead transitions. [2024-06-20 16:16:19,217 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 511 places, 813 transitions, 15920 flow [2024-06-20 16:16:19,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:16:19,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:16:19,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 152 transitions. [2024-06-20 16:16:19,218 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4634146341463415 [2024-06-20 16:16:19,218 INFO L175 Difference]: Start difference. First operand has 504 places, 785 transitions, 13508 flow. Second operand 8 states and 152 transitions. [2024-06-20 16:16:19,218 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 511 places, 813 transitions, 15920 flow [2024-06-20 16:16:31,010 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 503 places, 813 transitions, 15514 flow, removed 28 selfloop flow, removed 8 redundant places. [2024-06-20 16:16:31,020 INFO L231 Difference]: Finished difference. Result has 504 places, 788 transitions, 13599 flow [2024-06-20 16:16:31,020 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=13102, PETRI_DIFFERENCE_MINUEND_PLACES=496, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=785, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=213, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=572, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=13599, PETRI_PLACES=504, PETRI_TRANSITIONS=788} [2024-06-20 16:16:31,020 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 462 predicate places. [2024-06-20 16:16:31,020 INFO L495 AbstractCegarLoop]: Abstraction has has 504 places, 788 transitions, 13599 flow [2024-06-20 16:16:31,021 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:16:31,021 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:16:31,021 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:16:31,021 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143 [2024-06-20 16:16:31,021 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)] === [2024-06-20 16:16:31,021 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:16:31,022 INFO L85 PathProgramCache]: Analyzing trace with hash 415245470, now seen corresponding path program 8 times [2024-06-20 16:16:31,022 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:16:31,022 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1928113983] [2024-06-20 16:16:31,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:16:31,022 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:16:31,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:16:31,807 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:16:31,807 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:16:31,808 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1928113983] [2024-06-20 16:16:31,808 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1928113983] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:16:31,808 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:16:31,808 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:16:31,808 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1231428531] [2024-06-20 16:16:31,808 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:16:31,808 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:16:31,808 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:16:31,808 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:16:31,809 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:16:31,871 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-20 16:16:31,871 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 504 places, 788 transitions, 13599 flow. Second operand has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:16:31,871 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:16:31,871 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-20 16:16:31,871 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:16:34,737 INFO L124 PetriNetUnfolderBase]: 5322/8320 cut-off events. [2024-06-20 16:16:34,737 INFO L125 PetriNetUnfolderBase]: For 2110551/2110555 co-relation queries the response was YES. [2024-06-20 16:16:34,852 INFO L83 FinitePrefix]: Finished finitePrefix Result has 95564 conditions, 8320 events. 5322/8320 cut-off events. For 2110551/2110555 co-relation queries the response was YES. Maximal size of possible extension queue 511. Compared 51704 event pairs, 872 based on Foata normal form. 6/8325 useless extension candidates. Maximal degree in co-relation 95330. Up to 7356 conditions per place. [2024-06-20 16:16:34,890 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 586 selfloop transitions, 223 changer transitions 0/813 dead transitions. [2024-06-20 16:16:34,890 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 511 places, 813 transitions, 15737 flow [2024-06-20 16:16:34,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:16:34,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:16:34,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 147 transitions. [2024-06-20 16:16:34,891 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4481707317073171 [2024-06-20 16:16:34,891 INFO L175 Difference]: Start difference. First operand has 504 places, 788 transitions, 13599 flow. Second operand 8 states and 147 transitions. [2024-06-20 16:16:34,891 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 511 places, 813 transitions, 15737 flow [2024-06-20 16:16:46,622 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 505 places, 813 transitions, 15173 flow, removed 25 selfloop flow, removed 6 redundant places. [2024-06-20 16:16:46,631 INFO L231 Difference]: Finished difference. Result has 506 places, 792 transitions, 13565 flow [2024-06-20 16:16:46,631 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=13054, PETRI_DIFFERENCE_MINUEND_PLACES=498, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=788, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=219, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=569, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=13565, PETRI_PLACES=506, PETRI_TRANSITIONS=792} [2024-06-20 16:16:46,632 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 464 predicate places. [2024-06-20 16:16:46,632 INFO L495 AbstractCegarLoop]: Abstraction has has 506 places, 792 transitions, 13565 flow [2024-06-20 16:16:46,632 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.777777777777779) internal successors, (97), 9 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:16:46,632 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:16:46,632 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:16:46,632 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable144 [2024-06-20 16:16:46,632 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)] === [2024-06-20 16:16:46,632 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:16:46,632 INFO L85 PathProgramCache]: Analyzing trace with hash 407483907, now seen corresponding path program 6 times [2024-06-20 16:16:46,632 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:16:46,632 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1382088247] [2024-06-20 16:16:46,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:16:46,633 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:16:46,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:16:47,425 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:16:47,425 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:16:47,425 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1382088247] [2024-06-20 16:16:47,426 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1382088247] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:16:47,426 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:16:47,426 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:16:47,426 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [631352207] [2024-06-20 16:16:47,426 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:16:47,426 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:16:47,426 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:16:47,426 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:16:47,426 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:16:47,542 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-20 16:16:47,542 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 506 places, 792 transitions, 13565 flow. Second operand has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:16:47,542 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:16:47,542 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-20 16:16:47,542 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:16:50,543 INFO L124 PetriNetUnfolderBase]: 5458/8524 cut-off events. [2024-06-20 16:16:50,543 INFO L125 PetriNetUnfolderBase]: For 2325059/2325063 co-relation queries the response was YES. [2024-06-20 16:16:50,657 INFO L83 FinitePrefix]: Finished finitePrefix Result has 99662 conditions, 8524 events. 5458/8524 cut-off events. For 2325059/2325063 co-relation queries the response was YES. Maximal size of possible extension queue 522. Compared 53019 event pairs, 892 based on Foata normal form. 12/8535 useless extension candidates. Maximal degree in co-relation 99427. Up to 6813 conditions per place. [2024-06-20 16:16:50,693 INFO L140 encePairwiseOnDemand]: 26/41 looper letters, 595 selfloop transitions, 234 changer transitions 0/833 dead transitions. [2024-06-20 16:16:50,694 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 515 places, 833 transitions, 16776 flow [2024-06-20 16:16:50,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 16:16:50,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 16:16:50,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 182 transitions. [2024-06-20 16:16:50,695 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44390243902439025 [2024-06-20 16:16:50,695 INFO L175 Difference]: Start difference. First operand has 506 places, 792 transitions, 13565 flow. Second operand 10 states and 182 transitions. [2024-06-20 16:16:50,695 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 515 places, 833 transitions, 16776 flow [2024-06-20 16:17:02,826 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 511 places, 833 transitions, 16439 flow, removed 15 selfloop flow, removed 4 redundant places. [2024-06-20 16:17:02,836 INFO L231 Difference]: Finished difference. Result has 512 places, 805 transitions, 14171 flow [2024-06-20 16:17:02,836 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=13228, PETRI_DIFFERENCE_MINUEND_PLACES=502, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=792, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=223, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=569, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=14171, PETRI_PLACES=512, PETRI_TRANSITIONS=805} [2024-06-20 16:17:02,836 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 470 predicate places. [2024-06-20 16:17:02,836 INFO L495 AbstractCegarLoop]: Abstraction has has 512 places, 805 transitions, 14171 flow [2024-06-20 16:17:02,836 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:17:02,836 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:17:02,836 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:17:02,836 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable145 [2024-06-20 16:17:02,836 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)] === [2024-06-20 16:17:02,837 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:17:02,837 INFO L85 PathProgramCache]: Analyzing trace with hash 407483690, now seen corresponding path program 9 times [2024-06-20 16:17:02,837 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:17:02,837 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1656231009] [2024-06-20 16:17:02,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:17:02,837 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:17:02,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:17:03,658 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:17:03,658 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:17:03,658 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1656231009] [2024-06-20 16:17:03,658 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1656231009] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:17:03,658 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:17:03,658 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:17:03,659 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1231358908] [2024-06-20 16:17:03,659 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:17:03,659 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:17:03,659 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:17:03,659 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:17:03,659 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:17:03,739 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-20 16:17:03,739 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 512 places, 805 transitions, 14171 flow. Second operand has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:17:03,739 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:17:03,739 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-20 16:17:03,739 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:17:06,857 INFO L124 PetriNetUnfolderBase]: 5468/8536 cut-off events. [2024-06-20 16:17:06,857 INFO L125 PetriNetUnfolderBase]: For 2305797/2305801 co-relation queries the response was YES. [2024-06-20 16:17:06,980 INFO L83 FinitePrefix]: Finished finitePrefix Result has 100386 conditions, 8536 events. 5468/8536 cut-off events. For 2305797/2305801 co-relation queries the response was YES. Maximal size of possible extension queue 522. Compared 53207 event pairs, 896 based on Foata normal form. 6/8541 useless extension candidates. Maximal degree in co-relation 100150. Up to 7554 conditions per place. [2024-06-20 16:17:07,022 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 625 selfloop transitions, 201 changer transitions 0/830 dead transitions. [2024-06-20 16:17:07,022 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 520 places, 830 transitions, 16367 flow [2024-06-20 16:17:07,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:17:07,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:17:07,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 160 transitions. [2024-06-20 16:17:07,023 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43360433604336046 [2024-06-20 16:17:07,023 INFO L175 Difference]: Start difference. First operand has 512 places, 805 transitions, 14171 flow. Second operand 9 states and 160 transitions. [2024-06-20 16:17:07,023 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 520 places, 830 transitions, 16367 flow [2024-06-20 16:17:19,183 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 516 places, 830 transitions, 16133 flow, removed 90 selfloop flow, removed 4 redundant places. [2024-06-20 16:17:19,193 INFO L231 Difference]: Finished difference. Result has 517 places, 808 transitions, 14406 flow [2024-06-20 16:17:19,193 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=13937, PETRI_DIFFERENCE_MINUEND_PLACES=508, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=805, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=198, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=607, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=14406, PETRI_PLACES=517, PETRI_TRANSITIONS=808} [2024-06-20 16:17:19,194 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 475 predicate places. [2024-06-20 16:17:19,194 INFO L495 AbstractCegarLoop]: Abstraction has has 517 places, 808 transitions, 14406 flow [2024-06-20 16:17:19,194 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:17:19,194 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:17:19,194 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:17:19,194 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable146 [2024-06-20 16:17:19,194 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)] === [2024-06-20 16:17:19,194 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:17:19,194 INFO L85 PathProgramCache]: Analyzing trace with hash -266539404, now seen corresponding path program 10 times [2024-06-20 16:17:19,194 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:17:19,194 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [132339505] [2024-06-20 16:17:19,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:17:19,195 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:17:19,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:17:20,017 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:17:20,018 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:17:20,018 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [132339505] [2024-06-20 16:17:20,018 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [132339505] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:17:20,018 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:17:20,018 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:17:20,018 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [305072117] [2024-06-20 16:17:20,018 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:17:20,018 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:17:20,018 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:17:20,018 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:17:20,018 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:17:20,108 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-20 16:17:20,108 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 517 places, 808 transitions, 14406 flow. Second operand has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:17:20,108 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:17:20,108 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-20 16:17:20,108 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:17:23,209 INFO L124 PetriNetUnfolderBase]: 5494/8570 cut-off events. [2024-06-20 16:17:23,209 INFO L125 PetriNetUnfolderBase]: For 2340926/2340930 co-relation queries the response was YES. [2024-06-20 16:17:23,329 INFO L83 FinitePrefix]: Finished finitePrefix Result has 100804 conditions, 8570 events. 5494/8570 cut-off events. For 2340926/2340930 co-relation queries the response was YES. Maximal size of possible extension queue 528. Compared 53370 event pairs, 892 based on Foata normal form. 6/8575 useless extension candidates. Maximal degree in co-relation 100566. Up to 7579 conditions per place. [2024-06-20 16:17:23,370 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 619 selfloop transitions, 214 changer transitions 0/837 dead transitions. [2024-06-20 16:17:23,370 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 525 places, 837 transitions, 16965 flow [2024-06-20 16:17:23,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:17:23,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:17:23,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 160 transitions. [2024-06-20 16:17:23,371 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43360433604336046 [2024-06-20 16:17:23,371 INFO L175 Difference]: Start difference. First operand has 517 places, 808 transitions, 14406 flow. Second operand 9 states and 160 transitions. [2024-06-20 16:17:23,371 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 525 places, 837 transitions, 16965 flow [2024-06-20 16:17:36,371 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 519 places, 837 transitions, 16673 flow, removed 15 selfloop flow, removed 6 redundant places. [2024-06-20 16:17:36,381 INFO L231 Difference]: Finished difference. Result has 520 places, 815 transitions, 14690 flow [2024-06-20 16:17:36,381 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=14121, PETRI_DIFFERENCE_MINUEND_PLACES=511, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=808, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=207, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=601, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=14690, PETRI_PLACES=520, PETRI_TRANSITIONS=815} [2024-06-20 16:17:36,382 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 478 predicate places. [2024-06-20 16:17:36,382 INFO L495 AbstractCegarLoop]: Abstraction has has 520 places, 815 transitions, 14690 flow [2024-06-20 16:17:36,382 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:17:36,382 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:17:36,382 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:17:36,382 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable147 [2024-06-20 16:17:36,382 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)] === [2024-06-20 16:17:36,382 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:17:36,382 INFO L85 PathProgramCache]: Analyzing trace with hash -67179499, now seen corresponding path program 7 times [2024-06-20 16:17:36,382 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:17:36,382 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [175723031] [2024-06-20 16:17:36,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:17:36,383 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:17:36,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:17:37,183 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:17:37,183 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:17:37,183 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [175723031] [2024-06-20 16:17:37,184 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [175723031] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:17:37,184 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:17:37,184 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:17:37,184 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [690317049] [2024-06-20 16:17:37,184 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:17:37,184 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:17:37,184 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:17:37,184 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:17:37,184 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:17:37,290 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-20 16:17:37,291 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 520 places, 815 transitions, 14690 flow. Second operand has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:17:37,291 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:17:37,291 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-20 16:17:37,291 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:17:40,543 INFO L124 PetriNetUnfolderBase]: 5534/8634 cut-off events. [2024-06-20 16:17:40,543 INFO L125 PetriNetUnfolderBase]: For 2434083/2434087 co-relation queries the response was YES. [2024-06-20 16:17:40,678 INFO L83 FinitePrefix]: Finished finitePrefix Result has 101724 conditions, 8634 events. 5534/8634 cut-off events. For 2434083/2434087 co-relation queries the response was YES. Maximal size of possible extension queue 532. Compared 53778 event pairs, 909 based on Foata normal form. 12/8645 useless extension candidates. Maximal degree in co-relation 101485. Up to 6858 conditions per place. [2024-06-20 16:17:40,718 INFO L140 encePairwiseOnDemand]: 27/41 looper letters, 594 selfloop transitions, 248 changer transitions 0/846 dead transitions. [2024-06-20 16:17:40,718 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 528 places, 846 transitions, 17563 flow [2024-06-20 16:17:40,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:17:40,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:17:40,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 170 transitions. [2024-06-20 16:17:40,719 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46070460704607047 [2024-06-20 16:17:40,719 INFO L175 Difference]: Start difference. First operand has 520 places, 815 transitions, 14690 flow. Second operand 9 states and 170 transitions. [2024-06-20 16:17:40,719 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 528 places, 846 transitions, 17563 flow [2024-06-20 16:17:52,060 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 523 places, 846 transitions, 17253 flow, removed 19 selfloop flow, removed 5 redundant places. [2024-06-20 16:17:52,071 INFO L231 Difference]: Finished difference. Result has 524 places, 819 transitions, 14991 flow [2024-06-20 16:17:52,071 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=14380, PETRI_DIFFERENCE_MINUEND_PLACES=515, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=815, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=244, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=571, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=14991, PETRI_PLACES=524, PETRI_TRANSITIONS=819} [2024-06-20 16:17:52,071 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 482 predicate places. [2024-06-20 16:17:52,071 INFO L495 AbstractCegarLoop]: Abstraction has has 524 places, 819 transitions, 14991 flow [2024-06-20 16:17:52,071 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:17:52,071 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:17:52,072 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:17:52,072 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable148 [2024-06-20 16:17:52,072 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)] === [2024-06-20 16:17:52,072 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:17:52,072 INFO L85 PathProgramCache]: Analyzing trace with hash 420383937, now seen corresponding path program 8 times [2024-06-20 16:17:52,072 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:17:52,072 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1892532923] [2024-06-20 16:17:52,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:17:52,072 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:17:52,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:17:52,871 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:17:52,871 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:17:52,871 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1892532923] [2024-06-20 16:17:52,871 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1892532923] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:17:52,871 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:17:52,871 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:17:52,871 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1164885525] [2024-06-20 16:17:52,871 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:17:52,872 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:17:52,872 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:17:52,872 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:17:52,872 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:17:52,951 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-20 16:17:52,952 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 524 places, 819 transitions, 14991 flow. Second operand has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:17:52,952 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:17:52,952 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-20 16:17:52,952 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:17:56,117 INFO L124 PetriNetUnfolderBase]: 5510/8592 cut-off events. [2024-06-20 16:17:56,117 INFO L125 PetriNetUnfolderBase]: For 2383527/2383527 co-relation queries the response was YES. [2024-06-20 16:17:56,244 INFO L83 FinitePrefix]: Finished finitePrefix Result has 100740 conditions, 8592 events. 5510/8592 cut-off events. For 2383527/2383527 co-relation queries the response was YES. Maximal size of possible extension queue 531. Compared 53437 event pairs, 999 based on Foata normal form. 8/8599 useless extension candidates. Maximal degree in co-relation 100500. Up to 8175 conditions per place. [2024-06-20 16:17:56,287 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 771 selfloop transitions, 62 changer transitions 0/837 dead transitions. [2024-06-20 16:17:56,288 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 532 places, 837 transitions, 16749 flow [2024-06-20 16:17:56,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:17:56,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:17:56,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 156 transitions. [2024-06-20 16:17:56,288 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42276422764227645 [2024-06-20 16:17:56,288 INFO L175 Difference]: Start difference. First operand has 524 places, 819 transitions, 14991 flow. Second operand 9 states and 156 transitions. [2024-06-20 16:17:56,288 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 532 places, 837 transitions, 16749 flow [2024-06-20 16:18:09,289 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 526 places, 837 transitions, 16113 flow, removed 89 selfloop flow, removed 6 redundant places. [2024-06-20 16:18:09,299 INFO L231 Difference]: Finished difference. Result has 527 places, 819 transitions, 14486 flow [2024-06-20 16:18:09,299 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=14355, PETRI_DIFFERENCE_MINUEND_PLACES=518, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=819, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=757, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=14486, PETRI_PLACES=527, PETRI_TRANSITIONS=819} [2024-06-20 16:18:09,299 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 485 predicate places. [2024-06-20 16:18:09,299 INFO L495 AbstractCegarLoop]: Abstraction has has 527 places, 819 transitions, 14486 flow [2024-06-20 16:18:09,299 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:18:09,299 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:18:09,299 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:18:09,299 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable149 [2024-06-20 16:18:09,299 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)] === [2024-06-20 16:18:09,300 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:18:09,300 INFO L85 PathProgramCache]: Analyzing trace with hash 420370700, now seen corresponding path program 11 times [2024-06-20 16:18:09,300 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:18:09,300 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1698386740] [2024-06-20 16:18:09,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:18:09,300 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:18:09,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:18:10,084 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:18:10,084 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:18:10,084 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1698386740] [2024-06-20 16:18:10,084 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1698386740] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:18:10,084 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:18:10,085 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:18:10,085 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1949472554] [2024-06-20 16:18:10,085 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:18:10,085 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:18:10,085 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:18:10,085 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:18:10,085 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:18:10,168 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-20 16:18:10,169 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 527 places, 819 transitions, 14486 flow. Second operand has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:18:10,169 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:18:10,169 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-20 16:18:10,169 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand Killed by 15