./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/mix035_power.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/mix035_power.opt_rmo.opt.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version bcb38a6f Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReachWitnessValidation.xml -i ../../../trunk/examples/svcomp/pthread-wmm/mix035_power.opt_rmo.opt.i ./goblint.2024-05-21_14-57-05.files/protection/mix035_power.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-bcb38a6-m [2024-06-03 19:38:10,525 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-03 19:38:10,582 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-03 19:38:10,590 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-03 19:38:10,590 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-03 19:38:10,616 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-03 19:38:10,617 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-03 19:38:10,617 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-03 19:38:10,618 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-03 19:38:10,621 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-03 19:38:10,621 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-03 19:38:10,621 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-03 19:38:10,622 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-03 19:38:10,623 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-03 19:38:10,623 INFO L153 SettingsManager]: * Use SBE=true [2024-06-03 19:38:10,623 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-03 19:38:10,624 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-03 19:38:10,624 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-03 19:38:10,624 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-03 19:38:10,624 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-03 19:38:10,625 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-03 19:38:10,626 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-03 19:38:10,626 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-03 19:38:10,626 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-03 19:38:10,626 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-03 19:38:10,626 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-03 19:38:10,627 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-03 19:38:10,627 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-03 19:38:10,627 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-03 19:38:10,627 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-03 19:38:10,628 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-03 19:38:10,628 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-03 19:38:10,629 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-03 19:38:10,629 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-03 19:38:10,629 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-03 19:38:10,629 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-03 19:38:10,629 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-03 19:38:10,630 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-03 19:38:10,630 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-03 19:38:10,630 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-03 19:38:10,630 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-03 19:38:10,630 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-03 19:38:10,630 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-03 19:38:10,631 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-03 19:38:10,840 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-03 19:38:10,855 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-03 19:38:10,858 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-03 19:38:10,859 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-03 19:38:10,860 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-03 19:38:10,860 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-05-21_14-57-05.files/protection/mix035_power.opt_rmo.opt.yml/witness.yml [2024-06-03 19:38:11,011 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-03 19:38:11,011 INFO L274 PluginConnector]: CDTParser initialized [2024-06-03 19:38:11,011 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/mix035_power.opt_rmo.opt.i [2024-06-03 19:38:11,956 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-03 19:38:12,152 INFO L384 CDTParser]: Found 1 translation units. [2024-06-03 19:38:12,153 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/mix035_power.opt_rmo.opt.i [2024-06-03 19:38:12,164 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a272cde83/799ae0c7eb9442ffaa3950fd19648998/FLAG35dcecf2c [2024-06-03 19:38:12,176 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a272cde83/799ae0c7eb9442ffaa3950fd19648998 [2024-06-03 19:38:12,177 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-03 19:38:12,178 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-03 19:38:12,180 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-03 19:38:12,181 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-03 19:38:12,184 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-03 19:38:12,185 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 03.06 07:38:11" (1/2) ... [2024-06-03 19:38:12,185 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@24e99591 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 07:38:12, skipping insertion in model container [2024-06-03 19:38:12,185 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 03.06 07:38:11" (1/2) ... [2024-06-03 19:38:12,186 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@6fd88d9 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 07:38:12, skipping insertion in model container [2024-06-03 19:38:12,187 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.06 07:38:12" (2/2) ... [2024-06-03 19:38:12,187 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@24e99591 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 07:38:12, skipping insertion in model container [2024-06-03 19:38:12,187 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.06 07:38:12" (2/2) ... [2024-06-03 19:38:12,188 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-03 19:38:12,261 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-03 19:38:12,262 INFO L97 edCorrectnessWitness]: Location invariant before [L847-L847] ((((((((((((((((((((! multithreaded || x$flush_delayed == (_Bool)0) && (! multithreaded || ((0 <= x$w_buff0 && x$w_buff0 <= 1) && (x$w_buff0 == 0 || x$w_buff0 == 1)))) && (! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1)))) && (! multithreaded || x$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p1_EAX && __unbuffered_p1_EAX <= 1) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)))) && (! multithreaded || x$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1)))) && (! multithreaded || ((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 1) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)))) && (! multithreaded || ((0 <= a && a <= 1) && (a == 0 || a == 1)))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || ((0 <= x$w_buff1 && x$w_buff1 <= 1) && (x$w_buff1 == 0 || x$w_buff1 == 1)))) && (! multithreaded || x$read_delayed == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || ((0 <= z && z <= 1) && (z == 0 || z == 1)))) && (! multithreaded || ((0 <= __unbuffered_p2_EBX && __unbuffered_p2_EBX <= 1) && (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1)))) && (! multithreaded || x$read_delayed_var == 0)) && (! multithreaded || ((0 <= x$mem_tmp && x$mem_tmp <= 1) && (x$mem_tmp == 0 || x$mem_tmp == 1)))) && (! multithreaded || x$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd3 == (_Bool)0) [2024-06-03 19:38:12,262 INFO L97 edCorrectnessWitness]: Location invariant before [L846-L846] ((((((((((((((((((((! multithreaded || x$flush_delayed == (_Bool)0) && (! multithreaded || ((0 <= x$w_buff0 && x$w_buff0 <= 1) && (x$w_buff0 == 0 || x$w_buff0 == 1)))) && (! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1)))) && (! multithreaded || x$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p1_EAX && __unbuffered_p1_EAX <= 1) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)))) && (! multithreaded || x$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1)))) && (! multithreaded || ((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 1) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)))) && (! multithreaded || ((0 <= a && a <= 1) && (a == 0 || a == 1)))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || ((0 <= x$w_buff1 && x$w_buff1 <= 1) && (x$w_buff1 == 0 || x$w_buff1 == 1)))) && (! multithreaded || x$read_delayed == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || ((0 <= z && z <= 1) && (z == 0 || z == 1)))) && (! multithreaded || ((0 <= __unbuffered_p2_EBX && __unbuffered_p2_EBX <= 1) && (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1)))) && (! multithreaded || x$read_delayed_var == 0)) && (! multithreaded || ((0 <= x$mem_tmp && x$mem_tmp <= 1) && (x$mem_tmp == 0 || x$mem_tmp == 1)))) && (! multithreaded || x$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd3 == (_Bool)0) [2024-06-03 19:38:12,262 INFO L97 edCorrectnessWitness]: Location invariant before [L844-L844] ((((((((((((((((((((! multithreaded || x$flush_delayed == (_Bool)0) && (! multithreaded || ((0 <= x$w_buff0 && x$w_buff0 <= 1) && (x$w_buff0 == 0 || x$w_buff0 == 1)))) && (! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1)))) && (! multithreaded || x$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p1_EAX && __unbuffered_p1_EAX <= 1) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)))) && (! multithreaded || x$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1)))) && (! multithreaded || ((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 1) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)))) && (! multithreaded || ((0 <= a && a <= 1) && (a == 0 || a == 1)))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || ((0 <= x$w_buff1 && x$w_buff1 <= 1) && (x$w_buff1 == 0 || x$w_buff1 == 1)))) && (! multithreaded || x$read_delayed == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || ((0 <= z && z <= 1) && (z == 0 || z == 1)))) && (! multithreaded || ((0 <= __unbuffered_p2_EBX && __unbuffered_p2_EBX <= 1) && (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1)))) && (! multithreaded || x$read_delayed_var == 0)) && (! multithreaded || ((0 <= x$mem_tmp && x$mem_tmp <= 1) && (x$mem_tmp == 0 || x$mem_tmp == 1)))) && (! multithreaded || x$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd3 == (_Bool)0) [2024-06-03 19:38:12,263 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-03 19:38:12,263 INFO L106 edCorrectnessWitness]: ghost_update [L842-L842] multithreaded = 1; [2024-06-03 19:38:12,295 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-03 19:38:12,547 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-03 19:38:12,554 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-03 19:38:12,682 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-03 19:38:12,716 INFO L206 MainTranslator]: Completed translation [2024-06-03 19:38:12,717 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 07:38:12 WrapperNode [2024-06-03 19:38:12,717 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-03 19:38:12,718 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-03 19:38:12,718 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-03 19:38:12,718 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-03 19:38:12,723 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 07:38:12" (1/1) ... [2024-06-03 19:38:12,734 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 07:38:12" (1/1) ... [2024-06-03 19:38:12,765 INFO L138 Inliner]: procedures = 175, calls = 47, calls flagged for inlining = 6, calls inlined = 7, statements flattened = 128 [2024-06-03 19:38:12,765 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-03 19:38:12,766 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-03 19:38:12,766 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-03 19:38:12,766 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-03 19:38:12,774 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 07:38:12" (1/1) ... [2024-06-03 19:38:12,774 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 07:38:12" (1/1) ... [2024-06-03 19:38:12,777 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 07:38:12" (1/1) ... [2024-06-03 19:38:12,792 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2024-06-03 19:38:12,792 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 07:38:12" (1/1) ... [2024-06-03 19:38:12,793 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 07:38:12" (1/1) ... [2024-06-03 19:38:12,799 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 07:38:12" (1/1) ... [2024-06-03 19:38:12,800 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 07:38:12" (1/1) ... [2024-06-03 19:38:12,804 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 07:38:12" (1/1) ... [2024-06-03 19:38:12,807 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 07:38:12" (1/1) ... [2024-06-03 19:38:12,814 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-03 19:38:12,815 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-03 19:38:12,820 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-03 19:38:12,820 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-03 19:38:12,821 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 07:38:12" (1/1) ... [2024-06-03 19:38:12,824 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-03 19:38:12,830 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-03 19:38:12,844 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-06-03 19:38:12,847 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-06-03 19:38:12,871 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-03 19:38:12,872 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-03 19:38:12,872 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-03 19:38:12,872 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-03 19:38:12,872 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-03 19:38:12,872 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-03 19:38:12,872 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-03 19:38:12,873 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-03 19:38:12,873 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-03 19:38:12,873 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-03 19:38:12,873 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-03 19:38:12,874 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-03 19:38:12,875 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-03 19:38:12,990 INFO L244 CfgBuilder]: Building ICFG [2024-06-03 19:38:12,992 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-03 19:38:13,322 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-03 19:38:13,324 INFO L293 CfgBuilder]: Performing block encoding [2024-06-03 19:38:13,446 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-03 19:38:13,446 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-03 19:38:13,447 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.06 07:38:13 BoogieIcfgContainer [2024-06-03 19:38:13,447 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-03 19:38:13,450 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-03 19:38:13,451 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-03 19:38:13,453 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-03 19:38:13,453 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 03.06 07:38:11" (1/4) ... [2024-06-03 19:38:13,454 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@67c9f690 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 03.06 07:38:13, skipping insertion in model container [2024-06-03 19:38:13,454 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.06 07:38:12" (2/4) ... [2024-06-03 19:38:13,454 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@67c9f690 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.06 07:38:13, skipping insertion in model container [2024-06-03 19:38:13,454 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 07:38:12" (3/4) ... [2024-06-03 19:38:13,455 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@67c9f690 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.06 07:38:13, skipping insertion in model container [2024-06-03 19:38:13,456 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.06 07:38:13" (4/4) ... [2024-06-03 19:38:13,456 INFO L112 eAbstractionObserver]: Analyzing ICFG mix035_power.opt_rmo.opt.i [2024-06-03 19:38:13,469 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-03 19:38:13,470 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2024-06-03 19:38:13,470 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-03 19:38:13,536 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-03 19:38:13,564 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 53 places, 43 transitions, 98 flow [2024-06-03 19:38:13,590 INFO L124 PetriNetUnfolderBase]: 0/40 cut-off events. [2024-06-03 19:38:13,591 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-03 19:38:13,593 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50 conditions, 40 events. 0/40 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 64 event pairs, 0 based on Foata normal form. 0/37 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2024-06-03 19:38:13,593 INFO L82 GeneralOperation]: Start removeDead. Operand has 53 places, 43 transitions, 98 flow [2024-06-03 19:38:13,596 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 44 places, 34 transitions, 77 flow [2024-06-03 19:38:13,602 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-03 19:38:13,607 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;@450d5dfd, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-03 19:38:13,608 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2024-06-03 19:38:13,613 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-03 19:38:13,613 INFO L124 PetriNetUnfolderBase]: 0/6 cut-off events. [2024-06-03 19:38:13,613 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-03 19:38:13,613 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:38:13,614 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-06-03 19:38:13,614 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:38:13,618 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:38:13,618 INFO L85 PathProgramCache]: Analyzing trace with hash -1358440230, now seen corresponding path program 1 times [2024-06-03 19:38:13,625 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:38:13,626 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [636517603] [2024-06-03 19:38:13,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:38:13,627 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:38:13,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:38:14,572 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:38:14,573 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:38:14,574 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [636517603] [2024-06-03 19:38:14,574 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [636517603] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:38:14,574 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:38:14,575 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-03 19:38:14,576 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1663970651] [2024-06-03 19:38:14,576 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:38:14,586 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-03 19:38:14,590 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:38:14,613 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-03 19:38:14,614 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-03 19:38:14,674 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 43 [2024-06-03 19:38:14,677 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 34 transitions, 77 flow. Second operand has 3 states, 3 states have (on average 15.0) internal successors, (45), 3 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:38:14,677 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:38:14,677 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 43 [2024-06-03 19:38:14,678 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:38:14,988 INFO L124 PetriNetUnfolderBase]: 1116/1817 cut-off events. [2024-06-03 19:38:14,988 INFO L125 PetriNetUnfolderBase]: For 28/28 co-relation queries the response was YES. [2024-06-03 19:38:14,994 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3570 conditions, 1817 events. 1116/1817 cut-off events. For 28/28 co-relation queries the response was YES. Maximal size of possible extension queue 84. Compared 9170 event pairs, 765 based on Foata normal form. 1/1763 useless extension candidates. Maximal degree in co-relation 3555. Up to 1676 conditions per place. [2024-06-03 19:38:15,002 INFO L140 encePairwiseOnDemand]: 36/43 looper letters, 33 selfloop transitions, 4 changer transitions 0/44 dead transitions. [2024-06-03 19:38:15,002 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 44 transitions, 177 flow [2024-06-03 19:38:15,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-03 19:38:15,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-03 19:38:15,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 79 transitions. [2024-06-03 19:38:15,012 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6124031007751938 [2024-06-03 19:38:15,013 INFO L175 Difference]: Start difference. First operand has 44 places, 34 transitions, 77 flow. Second operand 3 states and 79 transitions. [2024-06-03 19:38:15,014 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 44 transitions, 177 flow [2024-06-03 19:38:15,016 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 44 transitions, 172 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-03 19:38:15,019 INFO L231 Difference]: Finished difference. Result has 44 places, 37 transitions, 104 flow [2024-06-03 19:38:15,021 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=74, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=104, PETRI_PLACES=44, PETRI_TRANSITIONS=37} [2024-06-03 19:38:15,023 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 0 predicate places. [2024-06-03 19:38:15,023 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 37 transitions, 104 flow [2024-06-03 19:38:15,024 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.0) internal successors, (45), 3 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:38:15,024 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:38:15,024 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:38:15,024 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-03 19:38:15,024 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:38:15,026 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:38:15,026 INFO L85 PathProgramCache]: Analyzing trace with hash 209036473, now seen corresponding path program 1 times [2024-06-03 19:38:15,026 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:38:15,026 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1092253922] [2024-06-03 19:38:15,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:38:15,026 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:38:15,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:38:15,750 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:38:15,750 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:38:15,750 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1092253922] [2024-06-03 19:38:15,750 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1092253922] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:38:15,751 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:38:15,751 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-03 19:38:15,751 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [73191624] [2024-06-03 19:38:15,751 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:38:15,753 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-03 19:38:15,753 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:38:15,754 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-03 19:38:15,754 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-03 19:38:15,833 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 43 [2024-06-03 19:38:15,834 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 37 transitions, 104 flow. Second operand has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:38:15,834 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:38:15,834 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 43 [2024-06-03 19:38:15,834 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:38:16,106 INFO L124 PetriNetUnfolderBase]: 1274/2001 cut-off events. [2024-06-03 19:38:16,106 INFO L125 PetriNetUnfolderBase]: For 384/384 co-relation queries the response was YES. [2024-06-03 19:38:16,109 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4509 conditions, 2001 events. 1274/2001 cut-off events. For 384/384 co-relation queries the response was YES. Maximal size of possible extension queue 94. Compared 9806 event pairs, 608 based on Foata normal form. 6/1981 useless extension candidates. Maximal degree in co-relation 4494. Up to 1873 conditions per place. [2024-06-03 19:38:16,116 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 42 selfloop transitions, 7 changer transitions 0/55 dead transitions. [2024-06-03 19:38:16,117 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 55 transitions, 250 flow [2024-06-03 19:38:16,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-03 19:38:16,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-03 19:38:16,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 100 transitions. [2024-06-03 19:38:16,118 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5813953488372093 [2024-06-03 19:38:16,118 INFO L175 Difference]: Start difference. First operand has 44 places, 37 transitions, 104 flow. Second operand 4 states and 100 transitions. [2024-06-03 19:38:16,118 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 55 transitions, 250 flow [2024-06-03 19:38:16,119 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 55 transitions, 246 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-03 19:38:16,120 INFO L231 Difference]: Finished difference. Result has 47 places, 40 transitions, 140 flow [2024-06-03 19:38:16,120 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=100, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=140, PETRI_PLACES=47, PETRI_TRANSITIONS=40} [2024-06-03 19:38:16,121 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 3 predicate places. [2024-06-03 19:38:16,121 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 40 transitions, 140 flow [2024-06-03 19:38:16,121 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:38:16,121 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:38:16,121 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:38:16,122 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-03 19:38:16,122 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:38:16,122 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:38:16,122 INFO L85 PathProgramCache]: Analyzing trace with hash -295724106, now seen corresponding path program 1 times [2024-06-03 19:38:16,123 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:38:16,123 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1819616529] [2024-06-03 19:38:16,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:38:16,123 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:38:16,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:38:17,334 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:38:17,335 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:38:17,335 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1819616529] [2024-06-03 19:38:17,335 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1819616529] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:38:17,335 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:38:17,335 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-03 19:38:17,336 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1604935276] [2024-06-03 19:38:17,336 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:38:17,336 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-03 19:38:17,336 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:38:17,337 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-03 19:38:17,337 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-06-03 19:38:17,421 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 43 [2024-06-03 19:38:17,422 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 40 transitions, 140 flow. Second operand has 6 states, 6 states have (on average 13.5) internal successors, (81), 6 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:38:17,422 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:38:17,422 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 43 [2024-06-03 19:38:17,422 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:38:17,764 INFO L124 PetriNetUnfolderBase]: 1265/1984 cut-off events. [2024-06-03 19:38:17,764 INFO L125 PetriNetUnfolderBase]: For 1078/1078 co-relation queries the response was YES. [2024-06-03 19:38:17,767 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4983 conditions, 1984 events. 1265/1984 cut-off events. For 1078/1078 co-relation queries the response was YES. Maximal size of possible extension queue 94. Compared 9757 event pairs, 445 based on Foata normal form. 6/1964 useless extension candidates. Maximal degree in co-relation 4966. Up to 1828 conditions per place. [2024-06-03 19:38:17,777 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 52 selfloop transitions, 12 changer transitions 0/70 dead transitions. [2024-06-03 19:38:17,777 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 70 transitions, 356 flow [2024-06-03 19:38:17,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 19:38:17,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 19:38:17,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 139 transitions. [2024-06-03 19:38:17,779 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5387596899224806 [2024-06-03 19:38:17,779 INFO L175 Difference]: Start difference. First operand has 47 places, 40 transitions, 140 flow. Second operand 6 states and 139 transitions. [2024-06-03 19:38:17,780 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 70 transitions, 356 flow [2024-06-03 19:38:17,781 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 70 transitions, 336 flow, removed 4 selfloop flow, removed 2 redundant places. [2024-06-03 19:38:17,782 INFO L231 Difference]: Finished difference. Result has 51 places, 44 transitions, 183 flow [2024-06-03 19:38:17,782 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=120, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=183, PETRI_PLACES=51, PETRI_TRANSITIONS=44} [2024-06-03 19:38:17,783 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 7 predicate places. [2024-06-03 19:38:17,783 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 44 transitions, 183 flow [2024-06-03 19:38:17,783 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.5) internal successors, (81), 6 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:38:17,783 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:38:17,783 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:38:17,783 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-03 19:38:17,784 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:38:17,784 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:38:17,784 INFO L85 PathProgramCache]: Analyzing trace with hash -1079015881, now seen corresponding path program 1 times [2024-06-03 19:38:17,784 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:38:17,784 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [585449533] [2024-06-03 19:38:17,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:38:17,785 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:38:17,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:38:18,559 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:38:18,559 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:38:18,559 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [585449533] [2024-06-03 19:38:18,559 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [585449533] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:38:18,560 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:38:18,560 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-03 19:38:18,560 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1617159106] [2024-06-03 19:38:18,560 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:38:18,560 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-03 19:38:18,561 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:38:18,561 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-03 19:38:18,561 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-03 19:38:18,645 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 43 [2024-06-03 19:38:18,646 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 44 transitions, 183 flow. Second operand has 6 states, 6 states have (on average 13.666666666666666) internal successors, (82), 6 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) [2024-06-03 19:38:18,646 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:38:18,646 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 43 [2024-06-03 19:38:18,646 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:38:18,922 INFO L124 PetriNetUnfolderBase]: 1090/1820 cut-off events. [2024-06-03 19:38:18,923 INFO L125 PetriNetUnfolderBase]: For 1770/1770 co-relation queries the response was YES. [2024-06-03 19:38:18,925 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4896 conditions, 1820 events. 1090/1820 cut-off events. For 1770/1770 co-relation queries the response was YES. Maximal size of possible extension queue 87. Compared 9391 event pairs, 460 based on Foata normal form. 2/1815 useless extension candidates. Maximal degree in co-relation 4877. Up to 1627 conditions per place. [2024-06-03 19:38:18,932 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 43 selfloop transitions, 8 changer transitions 0/58 dead transitions. [2024-06-03 19:38:18,932 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 58 transitions, 327 flow [2024-06-03 19:38:18,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-03 19:38:18,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-03 19:38:18,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 105 transitions. [2024-06-03 19:38:18,934 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4883720930232558 [2024-06-03 19:38:18,934 INFO L175 Difference]: Start difference. First operand has 51 places, 44 transitions, 183 flow. Second operand 5 states and 105 transitions. [2024-06-03 19:38:18,934 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 58 transitions, 327 flow [2024-06-03 19:38:18,936 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 58 transitions, 300 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-06-03 19:38:18,937 INFO L231 Difference]: Finished difference. Result has 53 places, 47 transitions, 200 flow [2024-06-03 19:38:18,937 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=156, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=200, PETRI_PLACES=53, PETRI_TRANSITIONS=47} [2024-06-03 19:38:18,938 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 9 predicate places. [2024-06-03 19:38:18,938 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 47 transitions, 200 flow [2024-06-03 19:38:18,938 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.666666666666666) internal successors, (82), 6 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) [2024-06-03 19:38:18,938 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:38:18,938 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:38:18,938 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-03 19:38:18,939 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:38:18,939 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:38:18,939 INFO L85 PathProgramCache]: Analyzing trace with hash 20789242, now seen corresponding path program 1 times [2024-06-03 19:38:18,939 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:38:18,939 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1874222784] [2024-06-03 19:38:18,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:38:18,940 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:38:18,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:38:19,621 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:38:19,621 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:38:19,622 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1874222784] [2024-06-03 19:38:19,622 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1874222784] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:38:19,622 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:38:19,622 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 19:38:19,623 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1619169047] [2024-06-03 19:38:19,623 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:38:19,623 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 19:38:19,623 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:38:19,624 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 19:38:19,624 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-03 19:38:19,683 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-03 19:38:19,684 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 47 transitions, 200 flow. Second operand has 7 states, 7 states have (on average 12.571428571428571) internal successors, (88), 7 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:38:19,684 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:38:19,684 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-03 19:38:19,684 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:38:20,117 INFO L124 PetriNetUnfolderBase]: 1282/2029 cut-off events. [2024-06-03 19:38:20,117 INFO L125 PetriNetUnfolderBase]: For 3106/3106 co-relation queries the response was YES. [2024-06-03 19:38:20,121 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6031 conditions, 2029 events. 1282/2029 cut-off events. For 3106/3106 co-relation queries the response was YES. Maximal size of possible extension queue 94. Compared 10031 event pairs, 530 based on Foata normal form. 4/2022 useless extension candidates. Maximal degree in co-relation 6010. Up to 1880 conditions per place. [2024-06-03 19:38:20,129 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 52 selfloop transitions, 11 changer transitions 0/69 dead transitions. [2024-06-03 19:38:20,129 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 69 transitions, 394 flow [2024-06-03 19:38:20,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 19:38:20,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 19:38:20,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 123 transitions. [2024-06-03 19:38:20,130 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47674418604651164 [2024-06-03 19:38:20,130 INFO L175 Difference]: Start difference. First operand has 53 places, 47 transitions, 200 flow. Second operand 6 states and 123 transitions. [2024-06-03 19:38:20,130 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 69 transitions, 394 flow [2024-06-03 19:38:20,133 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 69 transitions, 374 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-06-03 19:38:20,133 INFO L231 Difference]: Finished difference. Result has 56 places, 50 transitions, 234 flow [2024-06-03 19:38:20,134 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=180, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=234, PETRI_PLACES=56, PETRI_TRANSITIONS=50} [2024-06-03 19:38:20,134 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 12 predicate places. [2024-06-03 19:38:20,134 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 50 transitions, 234 flow [2024-06-03 19:38:20,135 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.571428571428571) internal successors, (88), 7 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:38:20,135 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:38:20,135 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:38:20,135 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-03 19:38:20,135 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:38:20,135 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:38:20,136 INFO L85 PathProgramCache]: Analyzing trace with hash 20938972, now seen corresponding path program 2 times [2024-06-03 19:38:20,136 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:38:20,136 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [943326715] [2024-06-03 19:38:20,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:38:20,136 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:38:20,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:38:20,877 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:38:20,878 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:38:20,878 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [943326715] [2024-06-03 19:38:20,878 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [943326715] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:38:20,878 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:38:20,878 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 19:38:20,878 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2134900140] [2024-06-03 19:38:20,879 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:38:20,879 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 19:38:20,879 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:38:20,879 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 19:38:20,880 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-03 19:38:20,942 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-03 19:38:20,942 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 50 transitions, 234 flow. Second operand has 7 states, 7 states have (on average 12.571428571428571) internal successors, (88), 7 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:38:20,942 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:38:20,942 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-03 19:38:20,942 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:38:21,297 INFO L124 PetriNetUnfolderBase]: 1288/2048 cut-off events. [2024-06-03 19:38:21,298 INFO L125 PetriNetUnfolderBase]: For 4533/4537 co-relation queries the response was YES. [2024-06-03 19:38:21,301 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6587 conditions, 2048 events. 1288/2048 cut-off events. For 4533/4537 co-relation queries the response was YES. Maximal size of possible extension queue 94. Compared 10202 event pairs, 528 based on Foata normal form. 8/2048 useless extension candidates. Maximal degree in co-relation 6565. Up to 1862 conditions per place. [2024-06-03 19:38:21,309 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 48 selfloop transitions, 16 changer transitions 0/70 dead transitions. [2024-06-03 19:38:21,310 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 70 transitions, 432 flow [2024-06-03 19:38:21,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 19:38:21,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 19:38:21,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 123 transitions. [2024-06-03 19:38:21,311 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47674418604651164 [2024-06-03 19:38:21,311 INFO L175 Difference]: Start difference. First operand has 56 places, 50 transitions, 234 flow. Second operand 6 states and 123 transitions. [2024-06-03 19:38:21,311 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 70 transitions, 432 flow [2024-06-03 19:38:21,313 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 70 transitions, 402 flow, removed 6 selfloop flow, removed 4 redundant places. [2024-06-03 19:38:21,314 INFO L231 Difference]: Finished difference. Result has 58 places, 53 transitions, 274 flow [2024-06-03 19:38:21,314 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=204, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=274, PETRI_PLACES=58, PETRI_TRANSITIONS=53} [2024-06-03 19:38:21,315 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 14 predicate places. [2024-06-03 19:38:21,315 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 53 transitions, 274 flow [2024-06-03 19:38:21,315 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.571428571428571) internal successors, (88), 7 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:38:21,315 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:38:21,315 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:38:21,315 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-03 19:38:21,316 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:38:21,316 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:38:21,316 INFO L85 PathProgramCache]: Analyzing trace with hash -1847107370, now seen corresponding path program 1 times [2024-06-03 19:38:21,316 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:38:21,316 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1032951809] [2024-06-03 19:38:21,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:38:21,317 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:38:21,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:38:22,283 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:38:22,283 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:38:22,284 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1032951809] [2024-06-03 19:38:22,284 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1032951809] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:38:22,284 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:38:22,284 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 19:38:22,284 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [68381446] [2024-06-03 19:38:22,284 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:38:22,285 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 19:38:22,285 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:38:22,285 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 19:38:22,285 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-03 19:38:22,368 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-03 19:38:22,368 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 53 transitions, 274 flow. Second operand has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:38:22,368 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:38:22,368 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-03 19:38:22,369 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:38:22,770 INFO L124 PetriNetUnfolderBase]: 1379/2248 cut-off events. [2024-06-03 19:38:22,770 INFO L125 PetriNetUnfolderBase]: For 6215/6215 co-relation queries the response was YES. [2024-06-03 19:38:22,774 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7513 conditions, 2248 events. 1379/2248 cut-off events. For 6215/6215 co-relation queries the response was YES. Maximal size of possible extension queue 98. Compared 11515 event pairs, 545 based on Foata normal form. 2/2239 useless extension candidates. Maximal degree in co-relation 7490. Up to 2030 conditions per place. [2024-06-03 19:38:22,784 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 58 selfloop transitions, 14 changer transitions 0/78 dead transitions. [2024-06-03 19:38:22,784 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 78 transitions, 503 flow [2024-06-03 19:38:22,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 19:38:22,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 19:38:22,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 137 transitions. [2024-06-03 19:38:22,785 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45514950166112955 [2024-06-03 19:38:22,785 INFO L175 Difference]: Start difference. First operand has 58 places, 53 transitions, 274 flow. Second operand 7 states and 137 transitions. [2024-06-03 19:38:22,786 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 78 transitions, 503 flow [2024-06-03 19:38:22,789 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 78 transitions, 454 flow, removed 9 selfloop flow, removed 4 redundant places. [2024-06-03 19:38:22,790 INFO L231 Difference]: Finished difference. Result has 62 places, 59 transitions, 310 flow [2024-06-03 19:38:22,790 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=228, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=310, PETRI_PLACES=62, PETRI_TRANSITIONS=59} [2024-06-03 19:38:22,790 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 18 predicate places. [2024-06-03 19:38:22,791 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 59 transitions, 310 flow [2024-06-03 19:38:22,791 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:38:22,791 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:38:22,791 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:38:22,791 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-03 19:38:22,791 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:38:22,792 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:38:22,792 INFO L85 PathProgramCache]: Analyzing trace with hash -1603250192, now seen corresponding path program 1 times [2024-06-03 19:38:22,792 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:38:22,792 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [277997534] [2024-06-03 19:38:22,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:38:22,792 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:38:22,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:38:23,854 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:38:23,855 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:38:23,855 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [277997534] [2024-06-03 19:38:23,855 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [277997534] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:38:23,855 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:38:23,855 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 19:38:23,856 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1867583669] [2024-06-03 19:38:23,856 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:38:23,856 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 19:38:23,856 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:38:23,857 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 19:38:23,857 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-03 19:38:23,972 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-03 19:38:23,973 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 59 transitions, 310 flow. Second operand has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:38:23,973 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:38:23,973 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-03 19:38:23,973 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:38:24,435 INFO L124 PetriNetUnfolderBase]: 1476/2335 cut-off events. [2024-06-03 19:38:24,436 INFO L125 PetriNetUnfolderBase]: For 8812/8812 co-relation queries the response was YES. [2024-06-03 19:38:24,440 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8585 conditions, 2335 events. 1476/2335 cut-off events. For 8812/8812 co-relation queries the response was YES. Maximal size of possible extension queue 109. Compared 11831 event pairs, 568 based on Foata normal form. 2/2312 useless extension candidates. Maximal degree in co-relation 8560. Up to 2155 conditions per place. [2024-06-03 19:38:24,449 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 66 selfloop transitions, 14 changer transitions 0/87 dead transitions. [2024-06-03 19:38:24,449 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 87 transitions, 566 flow [2024-06-03 19:38:24,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 19:38:24,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 19:38:24,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 143 transitions. [2024-06-03 19:38:24,450 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4750830564784053 [2024-06-03 19:38:24,450 INFO L175 Difference]: Start difference. First operand has 62 places, 59 transitions, 310 flow. Second operand 7 states and 143 transitions. [2024-06-03 19:38:24,450 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 87 transitions, 566 flow [2024-06-03 19:38:24,454 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 87 transitions, 528 flow, removed 8 selfloop flow, removed 4 redundant places. [2024-06-03 19:38:24,455 INFO L231 Difference]: Finished difference. Result has 65 places, 62 transitions, 346 flow [2024-06-03 19:38:24,455 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=272, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=346, PETRI_PLACES=65, PETRI_TRANSITIONS=62} [2024-06-03 19:38:24,455 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 21 predicate places. [2024-06-03 19:38:24,456 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 62 transitions, 346 flow [2024-06-03 19:38:24,456 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:38:24,456 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:38:24,456 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:38:24,456 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-03 19:38:24,456 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:38:24,457 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:38:24,457 INFO L85 PathProgramCache]: Analyzing trace with hash 2009151036, now seen corresponding path program 1 times [2024-06-03 19:38:24,457 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:38:24,457 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2006687844] [2024-06-03 19:38:24,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:38:24,457 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:38:24,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:38:25,613 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:38:25,614 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:38:25,614 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2006687844] [2024-06-03 19:38:25,614 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2006687844] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:38:25,614 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:38:25,614 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:38:25,614 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1430567784] [2024-06-03 19:38:25,614 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:38:25,614 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:38:25,614 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:38:25,615 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:38:25,615 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:38:25,733 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-03 19:38:25,734 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 62 transitions, 346 flow. Second operand has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:38:25,734 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:38:25,734 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-03 19:38:25,734 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:38:26,185 INFO L124 PetriNetUnfolderBase]: 1361/2214 cut-off events. [2024-06-03 19:38:26,186 INFO L125 PetriNetUnfolderBase]: For 9740/9740 co-relation queries the response was YES. [2024-06-03 19:38:26,190 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8275 conditions, 2214 events. 1361/2214 cut-off events. For 9740/9740 co-relation queries the response was YES. Maximal size of possible extension queue 97. Compared 11307 event pairs, 505 based on Foata normal form. 4/2203 useless extension candidates. Maximal degree in co-relation 8249. Up to 1986 conditions per place. [2024-06-03 19:38:26,201 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 66 selfloop transitions, 16 changer transitions 0/88 dead transitions. [2024-06-03 19:38:26,201 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 88 transitions, 596 flow [2024-06-03 19:38:26,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:38:26,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:38:26,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 155 transitions. [2024-06-03 19:38:26,203 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45058139534883723 [2024-06-03 19:38:26,203 INFO L175 Difference]: Start difference. First operand has 65 places, 62 transitions, 346 flow. Second operand 8 states and 155 transitions. [2024-06-03 19:38:26,203 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 88 transitions, 596 flow [2024-06-03 19:38:26,206 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 88 transitions, 546 flow, removed 13 selfloop flow, removed 5 redundant places. [2024-06-03 19:38:26,207 INFO L231 Difference]: Finished difference. Result has 68 places, 64 transitions, 365 flow [2024-06-03 19:38:26,208 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=296, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=365, PETRI_PLACES=68, PETRI_TRANSITIONS=64} [2024-06-03 19:38:26,208 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 24 predicate places. [2024-06-03 19:38:26,209 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 64 transitions, 365 flow [2024-06-03 19:38:26,209 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:38:26,209 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:38:26,209 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:38:26,209 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-03 19:38:26,209 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:38:26,210 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:38:26,210 INFO L85 PathProgramCache]: Analyzing trace with hash -2038880934, now seen corresponding path program 1 times [2024-06-03 19:38:26,212 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:38:26,214 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1237671564] [2024-06-03 19:38:26,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:38:26,215 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:38:26,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:38:26,803 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:38:26,804 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:38:26,804 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1237671564] [2024-06-03 19:38:26,805 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1237671564] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:38:26,805 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:38:26,805 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-03 19:38:26,805 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1179819785] [2024-06-03 19:38:26,805 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:38:26,805 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-03 19:38:26,806 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:38:26,806 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-03 19:38:26,808 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-03 19:38:26,875 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-03 19:38:26,875 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 64 transitions, 365 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) [2024-06-03 19:38:26,876 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:38:26,876 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-03 19:38:26,876 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:38:27,246 INFO L124 PetriNetUnfolderBase]: 1358/2215 cut-off events. [2024-06-03 19:38:27,246 INFO L125 PetriNetUnfolderBase]: For 11515/11515 co-relation queries the response was YES. [2024-06-03 19:38:27,250 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8524 conditions, 2215 events. 1358/2215 cut-off events. For 11515/11515 co-relation queries the response was YES. Maximal size of possible extension queue 97. Compared 11280 event pairs, 514 based on Foata normal form. 1/2201 useless extension candidates. Maximal degree in co-relation 8497. Up to 2024 conditions per place. [2024-06-03 19:38:27,258 INFO L140 encePairwiseOnDemand]: 36/43 looper letters, 61 selfloop transitions, 8 changer transitions 0/75 dead transitions. [2024-06-03 19:38:27,258 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 75 transitions, 543 flow [2024-06-03 19:38:27,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-03 19:38:27,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-03 19:38:27,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 97 transitions. [2024-06-03 19:38:27,259 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4511627906976744 [2024-06-03 19:38:27,259 INFO L175 Difference]: Start difference. First operand has 68 places, 64 transitions, 365 flow. Second operand 5 states and 97 transitions. [2024-06-03 19:38:27,260 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 75 transitions, 543 flow [2024-06-03 19:38:27,264 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 75 transitions, 492 flow, removed 11 selfloop flow, removed 6 redundant places. [2024-06-03 19:38:27,265 INFO L231 Difference]: Finished difference. Result has 67 places, 67 transitions, 362 flow [2024-06-03 19:38:27,265 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=314, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=362, PETRI_PLACES=67, PETRI_TRANSITIONS=67} [2024-06-03 19:38:27,266 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 23 predicate places. [2024-06-03 19:38:27,266 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 67 transitions, 362 flow [2024-06-03 19:38:27,266 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) [2024-06-03 19:38:27,266 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:38:27,266 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:38:27,266 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-03 19:38:27,267 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)] === [2024-06-03 19:38:27,267 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:38:27,267 INFO L85 PathProgramCache]: Analyzing trace with hash 1842577589, now seen corresponding path program 1 times [2024-06-03 19:38:27,267 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:38:27,267 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1322745808] [2024-06-03 19:38:27,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:38:27,267 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:38:27,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:38:28,246 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:38:28,246 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:38:28,246 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1322745808] [2024-06-03 19:38:28,246 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1322745808] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:38:28,246 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:38:28,246 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:38:28,246 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2034113469] [2024-06-03 19:38:28,246 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:38:28,247 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:38:28,247 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:38:28,247 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:38:28,248 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:38:28,399 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-03 19:38:28,400 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 67 transitions, 362 flow. Second operand has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 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) [2024-06-03 19:38:28,400 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:38:28,400 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-03 19:38:28,400 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:38:28,889 INFO L124 PetriNetUnfolderBase]: 1576/2451 cut-off events. [2024-06-03 19:38:28,889 INFO L125 PetriNetUnfolderBase]: For 15617/15617 co-relation queries the response was YES. [2024-06-03 19:38:28,893 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10050 conditions, 2451 events. 1576/2451 cut-off events. For 15617/15617 co-relation queries the response was YES. Maximal size of possible extension queue 107. Compared 11985 event pairs, 563 based on Foata normal form. 2/2452 useless extension candidates. Maximal degree in co-relation 10022. Up to 2298 conditions per place. [2024-06-03 19:38:28,902 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 80 selfloop transitions, 17 changer transitions 0/102 dead transitions. [2024-06-03 19:38:28,902 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 102 transitions, 674 flow [2024-06-03 19:38:28,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:38:28,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:38:28,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 151 transitions. [2024-06-03 19:38:28,904 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.438953488372093 [2024-06-03 19:38:28,904 INFO L175 Difference]: Start difference. First operand has 67 places, 67 transitions, 362 flow. Second operand 8 states and 151 transitions. [2024-06-03 19:38:28,904 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 102 transitions, 674 flow [2024-06-03 19:38:28,909 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 102 transitions, 648 flow, removed 7 selfloop flow, removed 3 redundant places. [2024-06-03 19:38:28,910 INFO L231 Difference]: Finished difference. Result has 74 places, 76 transitions, 450 flow [2024-06-03 19:38:28,910 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=336, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=450, PETRI_PLACES=74, PETRI_TRANSITIONS=76} [2024-06-03 19:38:28,911 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 30 predicate places. [2024-06-03 19:38:28,911 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 76 transitions, 450 flow [2024-06-03 19:38:28,911 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 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) [2024-06-03 19:38:28,911 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:38:28,911 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:38:28,911 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-03 19:38:28,911 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:38:28,912 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:38:28,912 INFO L85 PathProgramCache]: Analyzing trace with hash -1248661323, now seen corresponding path program 2 times [2024-06-03 19:38:28,912 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:38:28,912 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [113303829] [2024-06-03 19:38:28,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:38:28,912 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:38:28,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:38:29,836 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:38:29,836 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:38:29,836 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [113303829] [2024-06-03 19:38:29,837 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [113303829] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:38:29,837 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:38:29,837 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:38:29,837 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1751781973] [2024-06-03 19:38:29,837 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:38:29,837 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:38:29,837 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:38:29,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:38:29,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:38:29,944 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-03 19:38:29,944 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 76 transitions, 450 flow. Second operand has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 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) [2024-06-03 19:38:29,944 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:38:29,948 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-03 19:38:29,948 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:38:30,398 INFO L124 PetriNetUnfolderBase]: 1587/2474 cut-off events. [2024-06-03 19:38:30,398 INFO L125 PetriNetUnfolderBase]: For 18662/18666 co-relation queries the response was YES. [2024-06-03 19:38:30,404 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10852 conditions, 2474 events. 1587/2474 cut-off events. For 18662/18666 co-relation queries the response was YES. Maximal size of possible extension queue 107. Compared 12119 event pairs, 570 based on Foata normal form. 6/2479 useless extension candidates. Maximal degree in co-relation 10821. Up to 2244 conditions per place. [2024-06-03 19:38:30,413 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 73 selfloop transitions, 35 changer transitions 0/113 dead transitions. [2024-06-03 19:38:30,414 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 113 transitions, 868 flow [2024-06-03 19:38:30,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:38:30,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:38:30,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 154 transitions. [2024-06-03 19:38:30,415 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4476744186046512 [2024-06-03 19:38:30,415 INFO L175 Difference]: Start difference. First operand has 74 places, 76 transitions, 450 flow. Second operand 8 states and 154 transitions. [2024-06-03 19:38:30,415 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 113 transitions, 868 flow [2024-06-03 19:38:30,423 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 113 transitions, 816 flow, removed 19 selfloop flow, removed 4 redundant places. [2024-06-03 19:38:30,424 INFO L231 Difference]: Finished difference. Result has 80 places, 88 transitions, 607 flow [2024-06-03 19:38:30,424 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=406, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=607, PETRI_PLACES=80, PETRI_TRANSITIONS=88} [2024-06-03 19:38:30,425 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 36 predicate places. [2024-06-03 19:38:30,425 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 88 transitions, 607 flow [2024-06-03 19:38:30,425 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 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) [2024-06-03 19:38:30,425 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:38:30,425 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:38:30,425 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-03 19:38:30,425 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:38:30,426 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:38:30,426 INFO L85 PathProgramCache]: Analyzing trace with hash -2141102939, now seen corresponding path program 3 times [2024-06-03 19:38:30,426 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:38:30,426 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1010765154] [2024-06-03 19:38:30,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:38:30,426 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:38:30,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:38:31,359 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:38:31,359 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:38:31,360 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1010765154] [2024-06-03 19:38:31,360 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1010765154] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:38:31,360 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:38:31,360 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:38:31,361 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [91510895] [2024-06-03 19:38:31,361 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:38:31,361 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:38:31,361 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:38:31,361 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:38:31,361 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:38:31,453 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-03 19:38:31,453 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 88 transitions, 607 flow. Second operand has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 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) [2024-06-03 19:38:31,454 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:38:31,454 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-03 19:38:31,454 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:38:31,931 INFO L124 PetriNetUnfolderBase]: 1609/2506 cut-off events. [2024-06-03 19:38:31,932 INFO L125 PetriNetUnfolderBase]: For 21907/21911 co-relation queries the response was YES. [2024-06-03 19:38:31,938 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11624 conditions, 2506 events. 1609/2506 cut-off events. For 21907/21911 co-relation queries the response was YES. Maximal size of possible extension queue 107. Compared 12296 event pairs, 570 based on Foata normal form. 6/2511 useless extension candidates. Maximal degree in co-relation 11590. Up to 2301 conditions per place. [2024-06-03 19:38:31,947 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 82 selfloop transitions, 30 changer transitions 0/117 dead transitions. [2024-06-03 19:38:31,947 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 117 transitions, 948 flow [2024-06-03 19:38:31,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:38:31,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:38:31,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 151 transitions. [2024-06-03 19:38:31,949 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.438953488372093 [2024-06-03 19:38:31,949 INFO L175 Difference]: Start difference. First operand has 80 places, 88 transitions, 607 flow. Second operand 8 states and 151 transitions. [2024-06-03 19:38:31,949 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 117 transitions, 948 flow [2024-06-03 19:38:31,960 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 117 transitions, 910 flow, removed 15 selfloop flow, removed 2 redundant places. [2024-06-03 19:38:31,961 INFO L231 Difference]: Finished difference. Result has 86 places, 94 transitions, 702 flow [2024-06-03 19:38:31,962 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=569, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=702, PETRI_PLACES=86, PETRI_TRANSITIONS=94} [2024-06-03 19:38:31,962 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 42 predicate places. [2024-06-03 19:38:31,962 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 94 transitions, 702 flow [2024-06-03 19:38:31,963 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 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) [2024-06-03 19:38:31,963 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:38:31,963 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:38:31,963 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-03 19:38:31,963 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:38:31,963 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:38:31,963 INFO L85 PathProgramCache]: Analyzing trace with hash 2146512707, now seen corresponding path program 4 times [2024-06-03 19:38:31,964 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:38:31,964 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [422418893] [2024-06-03 19:38:31,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:38:31,964 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:38:31,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:38:32,904 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:38:32,904 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:38:32,904 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [422418893] [2024-06-03 19:38:32,904 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [422418893] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:38:32,904 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:38:32,904 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:38:32,904 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [286237885] [2024-06-03 19:38:32,904 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:38:32,904 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:38:32,904 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:38:32,905 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:38:32,905 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:38:32,988 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-03 19:38:32,988 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 94 transitions, 702 flow. Second operand has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 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) [2024-06-03 19:38:32,988 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:38:32,988 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-03 19:38:32,988 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:38:33,438 INFO L124 PetriNetUnfolderBase]: 1604/2499 cut-off events. [2024-06-03 19:38:33,438 INFO L125 PetriNetUnfolderBase]: For 23742/23746 co-relation queries the response was YES. [2024-06-03 19:38:33,443 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11641 conditions, 2499 events. 1604/2499 cut-off events. For 23742/23746 co-relation queries the response was YES. Maximal size of possible extension queue 107. Compared 12253 event pairs, 570 based on Foata normal form. 6/2504 useless extension candidates. Maximal degree in co-relation 11605. Up to 2294 conditions per place. [2024-06-03 19:38:33,451 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 83 selfloop transitions, 29 changer transitions 0/117 dead transitions. [2024-06-03 19:38:33,451 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 117 transitions, 984 flow [2024-06-03 19:38:33,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:38:33,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:38:33,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 152 transitions. [2024-06-03 19:38:33,453 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4418604651162791 [2024-06-03 19:38:33,453 INFO L175 Difference]: Start difference. First operand has 86 places, 94 transitions, 702 flow. Second operand 8 states and 152 transitions. [2024-06-03 19:38:33,453 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 117 transitions, 984 flow [2024-06-03 19:38:33,465 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 117 transitions, 886 flow, removed 22 selfloop flow, removed 5 redundant places. [2024-06-03 19:38:33,466 INFO L231 Difference]: Finished difference. Result has 89 places, 94 transitions, 670 flow [2024-06-03 19:38:33,466 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=604, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=94, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=670, PETRI_PLACES=89, PETRI_TRANSITIONS=94} [2024-06-03 19:38:33,467 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 45 predicate places. [2024-06-03 19:38:33,467 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 94 transitions, 670 flow [2024-06-03 19:38:33,467 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 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) [2024-06-03 19:38:33,467 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:38:33,467 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:38:33,467 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-03 19:38:33,468 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:38:33,468 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:38:33,468 INFO L85 PathProgramCache]: Analyzing trace with hash 1188815514, now seen corresponding path program 1 times [2024-06-03 19:38:33,468 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:38:33,468 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1498897584] [2024-06-03 19:38:33,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:38:33,468 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:38:33,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:38:34,119 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:38:34,119 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:38:34,119 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1498897584] [2024-06-03 19:38:34,119 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1498897584] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:38:34,119 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:38:34,119 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 19:38:34,119 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1647427741] [2024-06-03 19:38:34,120 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:38:34,120 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 19:38:34,120 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:38:34,120 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 19:38:34,120 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-03 19:38:34,196 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-03 19:38:34,196 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 94 transitions, 670 flow. Second operand has 7 states, 7 states have (on average 12.0) internal successors, (84), 7 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:38:34,196 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:38:34,196 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-03 19:38:34,196 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:38:34,663 INFO L124 PetriNetUnfolderBase]: 1601/2502 cut-off events. [2024-06-03 19:38:34,663 INFO L125 PetriNetUnfolderBase]: For 25923/25923 co-relation queries the response was YES. [2024-06-03 19:38:34,668 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11788 conditions, 2502 events. 1601/2502 cut-off events. For 25923/25923 co-relation queries the response was YES. Maximal size of possible extension queue 109. Compared 12252 event pairs, 562 based on Foata normal form. 1/2502 useless extension candidates. Maximal degree in co-relation 11751. Up to 2371 conditions per place. [2024-06-03 19:38:34,677 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 90 selfloop transitions, 11 changer transitions 0/106 dead transitions. [2024-06-03 19:38:34,678 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 106 transitions, 918 flow [2024-06-03 19:38:34,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 19:38:34,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 19:38:34,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 107 transitions. [2024-06-03 19:38:34,679 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41472868217054265 [2024-06-03 19:38:34,679 INFO L175 Difference]: Start difference. First operand has 89 places, 94 transitions, 670 flow. Second operand 6 states and 107 transitions. [2024-06-03 19:38:34,679 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 106 transitions, 918 flow [2024-06-03 19:38:34,691 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 106 transitions, 816 flow, removed 12 selfloop flow, removed 8 redundant places. [2024-06-03 19:38:34,693 INFO L231 Difference]: Finished difference. Result has 87 places, 97 transitions, 626 flow [2024-06-03 19:38:34,693 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=568, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=94, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=626, PETRI_PLACES=87, PETRI_TRANSITIONS=97} [2024-06-03 19:38:34,693 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 43 predicate places. [2024-06-03 19:38:34,693 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 97 transitions, 626 flow [2024-06-03 19:38:34,694 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.0) internal successors, (84), 7 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:38:34,694 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:38:34,694 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:38:34,694 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-03 19:38:34,694 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:38:34,694 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:38:34,694 INFO L85 PathProgramCache]: Analyzing trace with hash -1499821325, now seen corresponding path program 1 times [2024-06-03 19:38:34,694 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:38:34,695 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1513968239] [2024-06-03 19:38:34,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:38:34,695 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:38:34,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:38:35,690 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:38:35,690 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:38:35,690 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1513968239] [2024-06-03 19:38:35,690 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1513968239] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:38:35,690 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:38:35,691 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:38:35,691 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [141473519] [2024-06-03 19:38:35,691 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:38:35,691 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:38:35,691 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:38:35,692 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:38:35,692 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:38:35,848 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-03 19:38:35,849 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 97 transitions, 626 flow. Second operand has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:38:35,849 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:38:35,849 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-03 19:38:35,849 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:38:36,388 INFO L124 PetriNetUnfolderBase]: 1615/2539 cut-off events. [2024-06-03 19:38:36,388 INFO L125 PetriNetUnfolderBase]: For 35303/35303 co-relation queries the response was YES. [2024-06-03 19:38:36,394 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12993 conditions, 2539 events. 1615/2539 cut-off events. For 35303/35303 co-relation queries the response was YES. Maximal size of possible extension queue 115. Compared 12938 event pairs, 417 based on Foata normal form. 4/2542 useless extension candidates. Maximal degree in co-relation 12957. Up to 2285 conditions per place. [2024-06-03 19:38:36,403 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 105 selfloop transitions, 15 changer transitions 0/130 dead transitions. [2024-06-03 19:38:36,403 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 130 transitions, 978 flow [2024-06-03 19:38:36,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:38:36,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:38:36,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 161 transitions. [2024-06-03 19:38:36,404 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4680232558139535 [2024-06-03 19:38:36,404 INFO L175 Difference]: Start difference. First operand has 87 places, 97 transitions, 626 flow. Second operand 8 states and 161 transitions. [2024-06-03 19:38:36,405 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 130 transitions, 978 flow [2024-06-03 19:38:36,417 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 130 transitions, 942 flow, removed 9 selfloop flow, removed 4 redundant places. [2024-06-03 19:38:36,418 INFO L231 Difference]: Finished difference. Result has 91 places, 99 transitions, 665 flow [2024-06-03 19:38:36,419 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=590, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=97, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=665, PETRI_PLACES=91, PETRI_TRANSITIONS=99} [2024-06-03 19:38:36,419 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 47 predicate places. [2024-06-03 19:38:36,419 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 99 transitions, 665 flow [2024-06-03 19:38:36,419 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:38:36,420 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:38:36,420 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:38:36,420 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-03 19:38:36,420 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:38:36,420 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:38:36,420 INFO L85 PathProgramCache]: Analyzing trace with hash 739860589, now seen corresponding path program 2 times [2024-06-03 19:38:36,420 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:38:36,421 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1400245542] [2024-06-03 19:38:36,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:38:36,421 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:38:36,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:38:37,629 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:38:37,630 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:38:37,630 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1400245542] [2024-06-03 19:38:37,630 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1400245542] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:38:37,630 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:38:37,630 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:38:37,630 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1721075295] [2024-06-03 19:38:37,630 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:38:37,630 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:38:37,630 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:38:37,630 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:38:37,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:38:37,728 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-03 19:38:37,728 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 99 transitions, 665 flow. Second operand has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:38:37,728 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:38:37,728 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-03 19:38:37,728 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:38:38,277 INFO L124 PetriNetUnfolderBase]: 1667/2627 cut-off events. [2024-06-03 19:38:38,277 INFO L125 PetriNetUnfolderBase]: For 40518/40518 co-relation queries the response was YES. [2024-06-03 19:38:38,283 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13883 conditions, 2627 events. 1667/2627 cut-off events. For 40518/40518 co-relation queries the response was YES. Maximal size of possible extension queue 115. Compared 13469 event pairs, 535 based on Foata normal form. 4/2630 useless extension candidates. Maximal degree in co-relation 13846. Up to 2374 conditions per place. [2024-06-03 19:38:38,292 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 106 selfloop transitions, 23 changer transitions 0/139 dead transitions. [2024-06-03 19:38:38,293 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 139 transitions, 1114 flow [2024-06-03 19:38:38,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:38:38,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:38:38,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 173 transitions. [2024-06-03 19:38:38,294 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4470284237726098 [2024-06-03 19:38:38,294 INFO L175 Difference]: Start difference. First operand has 91 places, 99 transitions, 665 flow. Second operand 9 states and 173 transitions. [2024-06-03 19:38:38,294 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 139 transitions, 1114 flow [2024-06-03 19:38:38,338 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 139 transitions, 1039 flow, removed 15 selfloop flow, removed 6 redundant places. [2024-06-03 19:38:38,340 INFO L231 Difference]: Finished difference. Result has 98 places, 113 transitions, 798 flow [2024-06-03 19:38:38,340 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=608, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=798, PETRI_PLACES=98, PETRI_TRANSITIONS=113} [2024-06-03 19:38:38,341 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 54 predicate places. [2024-06-03 19:38:38,341 INFO L495 AbstractCegarLoop]: Abstraction has has 98 places, 113 transitions, 798 flow [2024-06-03 19:38:38,341 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:38:38,341 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:38:38,341 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:38:38,342 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-03 19:38:38,342 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:38:38,342 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:38:38,342 INFO L85 PathProgramCache]: Analyzing trace with hash 1058290025, now seen corresponding path program 3 times [2024-06-03 19:38:38,342 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:38:38,342 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1381995360] [2024-06-03 19:38:38,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:38:38,343 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:38:38,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:38:39,447 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:38:39,448 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:38:39,448 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1381995360] [2024-06-03 19:38:39,448 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1381995360] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:38:39,448 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:38:39,448 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:38:39,448 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [260634127] [2024-06-03 19:38:39,448 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:38:39,448 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:38:39,448 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:38:39,449 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:38:39,449 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:38:39,616 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-03 19:38:39,617 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 113 transitions, 798 flow. Second operand has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:38:39,617 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:38:39,617 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-03 19:38:39,617 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:38:40,204 INFO L124 PetriNetUnfolderBase]: 1732/2740 cut-off events. [2024-06-03 19:38:40,205 INFO L125 PetriNetUnfolderBase]: For 45668/45672 co-relation queries the response was YES. [2024-06-03 19:38:40,211 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14928 conditions, 2740 events. 1732/2740 cut-off events. For 45668/45672 co-relation queries the response was YES. Maximal size of possible extension queue 114. Compared 14055 event pairs, 515 based on Foata normal form. 8/2747 useless extension candidates. Maximal degree in co-relation 14886. Up to 2450 conditions per place. [2024-06-03 19:38:40,220 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 116 selfloop transitions, 37 changer transitions 0/163 dead transitions. [2024-06-03 19:38:40,221 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 163 transitions, 1374 flow [2024-06-03 19:38:40,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:38:40,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:38:40,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 180 transitions. [2024-06-03 19:38:40,223 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46511627906976744 [2024-06-03 19:38:40,223 INFO L175 Difference]: Start difference. First operand has 98 places, 113 transitions, 798 flow. Second operand 9 states and 180 transitions. [2024-06-03 19:38:40,223 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 163 transitions, 1374 flow [2024-06-03 19:38:40,245 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 163 transitions, 1278 flow, removed 34 selfloop flow, removed 2 redundant places. [2024-06-03 19:38:40,247 INFO L231 Difference]: Finished difference. Result has 107 places, 131 transitions, 1011 flow [2024-06-03 19:38:40,247 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=745, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=113, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1011, PETRI_PLACES=107, PETRI_TRANSITIONS=131} [2024-06-03 19:38:40,248 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 63 predicate places. [2024-06-03 19:38:40,248 INFO L495 AbstractCegarLoop]: Abstraction has has 107 places, 131 transitions, 1011 flow [2024-06-03 19:38:40,248 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:38:40,248 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:38:40,249 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:38:40,249 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-03 19:38:40,249 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:38:40,249 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:38:40,249 INFO L85 PathProgramCache]: Analyzing trace with hash 857948269, now seen corresponding path program 4 times [2024-06-03 19:38:40,249 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:38:40,249 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1114781657] [2024-06-03 19:38:40,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:38:40,250 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:38:40,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:38:41,337 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:38:41,337 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:38:41,337 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1114781657] [2024-06-03 19:38:41,337 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1114781657] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:38:41,337 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:38:41,337 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:38:41,337 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2118304390] [2024-06-03 19:38:41,337 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:38:41,338 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:38:41,338 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:38:41,338 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:38:41,338 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:38:41,459 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-03 19:38:41,459 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 131 transitions, 1011 flow. Second operand has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:38:41,459 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:38:41,459 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-03 19:38:41,459 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:38:42,044 INFO L124 PetriNetUnfolderBase]: 1735/2750 cut-off events. [2024-06-03 19:38:42,044 INFO L125 PetriNetUnfolderBase]: For 51857/51861 co-relation queries the response was YES. [2024-06-03 19:38:42,052 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15464 conditions, 2750 events. 1735/2750 cut-off events. For 51857/51861 co-relation queries the response was YES. Maximal size of possible extension queue 113. Compared 14212 event pairs, 530 based on Foata normal form. 8/2755 useless extension candidates. Maximal degree in co-relation 15418. Up to 2492 conditions per place. [2024-06-03 19:38:42,061 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 127 selfloop transitions, 22 changer transitions 0/159 dead transitions. [2024-06-03 19:38:42,061 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 114 places, 159 transitions, 1437 flow [2024-06-03 19:38:42,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:38:42,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:38:42,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 158 transitions. [2024-06-03 19:38:42,063 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45930232558139533 [2024-06-03 19:38:42,063 INFO L175 Difference]: Start difference. First operand has 107 places, 131 transitions, 1011 flow. Second operand 8 states and 158 transitions. [2024-06-03 19:38:42,063 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 114 places, 159 transitions, 1437 flow [2024-06-03 19:38:42,085 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 159 transitions, 1347 flow, removed 17 selfloop flow, removed 5 redundant places. [2024-06-03 19:38:42,087 INFO L231 Difference]: Finished difference. Result has 110 places, 133 transitions, 1022 flow [2024-06-03 19:38:42,087 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=921, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=131, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=109, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1022, PETRI_PLACES=110, PETRI_TRANSITIONS=133} [2024-06-03 19:38:42,087 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 66 predicate places. [2024-06-03 19:38:42,087 INFO L495 AbstractCegarLoop]: Abstraction has has 110 places, 133 transitions, 1022 flow [2024-06-03 19:38:42,088 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:38:42,088 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:38:42,088 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:38:42,088 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-03 19:38:42,088 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:38:42,088 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:38:42,088 INFO L85 PathProgramCache]: Analyzing trace with hash 2116961189, now seen corresponding path program 1 times [2024-06-03 19:38:42,089 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:38:42,089 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [143976869] [2024-06-03 19:38:42,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:38:42,089 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:38:42,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:38:43,340 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:38:43,340 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:38:43,340 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [143976869] [2024-06-03 19:38:43,341 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [143976869] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:38:43,341 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:38:43,341 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:38:43,341 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1580600081] [2024-06-03 19:38:43,341 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:38:43,341 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:38:43,341 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:38:43,342 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:38:43,342 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:38:43,475 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-03 19:38:43,475 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 133 transitions, 1022 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:38:43,475 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:38:43,475 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-03 19:38:43,475 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:38:44,086 INFO L124 PetriNetUnfolderBase]: 1934/3009 cut-off events. [2024-06-03 19:38:44,086 INFO L125 PetriNetUnfolderBase]: For 55857/55861 co-relation queries the response was YES. [2024-06-03 19:38:44,094 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16375 conditions, 3009 events. 1934/3009 cut-off events. For 55857/55861 co-relation queries the response was YES. Maximal size of possible extension queue 115. Compared 15157 event pairs, 520 based on Foata normal form. 6/3014 useless extension candidates. Maximal degree in co-relation 16328. Up to 2716 conditions per place. [2024-06-03 19:38:44,104 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 121 selfloop transitions, 49 changer transitions 0/176 dead transitions. [2024-06-03 19:38:44,104 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 176 transitions, 1586 flow [2024-06-03 19:38:44,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:38:44,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:38:44,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 171 transitions. [2024-06-03 19:38:44,106 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4418604651162791 [2024-06-03 19:38:44,106 INFO L175 Difference]: Start difference. First operand has 110 places, 133 transitions, 1022 flow. Second operand 9 states and 171 transitions. [2024-06-03 19:38:44,106 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 176 transitions, 1586 flow [2024-06-03 19:38:44,138 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 176 transitions, 1492 flow, removed 23 selfloop flow, removed 7 redundant places. [2024-06-03 19:38:44,140 INFO L231 Difference]: Finished difference. Result has 113 places, 145 transitions, 1184 flow [2024-06-03 19:38:44,140 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=928, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=133, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1184, PETRI_PLACES=113, PETRI_TRANSITIONS=145} [2024-06-03 19:38:44,140 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 69 predicate places. [2024-06-03 19:38:44,140 INFO L495 AbstractCegarLoop]: Abstraction has has 113 places, 145 transitions, 1184 flow [2024-06-03 19:38:44,141 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:38:44,141 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:38:44,141 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:38:44,141 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-03 19:38:44,141 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:38:44,141 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:38:44,141 INFO L85 PathProgramCache]: Analyzing trace with hash 858132719, now seen corresponding path program 2 times [2024-06-03 19:38:44,141 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:38:44,142 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [459706168] [2024-06-03 19:38:44,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:38:44,142 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:38:44,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:38:45,240 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:38:45,240 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:38:45,240 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [459706168] [2024-06-03 19:38:45,241 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [459706168] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:38:45,241 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:38:45,241 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:38:45,241 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1816124126] [2024-06-03 19:38:45,241 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:38:45,242 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:38:45,242 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:38:45,242 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:38:45,242 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:38:45,397 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-03 19:38:45,397 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 113 places, 145 transitions, 1184 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:38:45,397 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:38:45,397 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-03 19:38:45,397 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:38:46,036 INFO L124 PetriNetUnfolderBase]: 1961/3038 cut-off events. [2024-06-03 19:38:46,037 INFO L125 PetriNetUnfolderBase]: For 61789/61789 co-relation queries the response was YES. [2024-06-03 19:38:46,045 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17315 conditions, 3038 events. 1961/3038 cut-off events. For 61789/61789 co-relation queries the response was YES. Maximal size of possible extension queue 116. Compared 15197 event pairs, 468 based on Foata normal form. 2/3039 useless extension candidates. Maximal degree in co-relation 17267. Up to 2680 conditions per place. [2024-06-03 19:38:46,055 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 113 selfloop transitions, 66 changer transitions 0/185 dead transitions. [2024-06-03 19:38:46,055 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 121 places, 185 transitions, 1842 flow [2024-06-03 19:38:46,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:38:46,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:38:46,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 174 transitions. [2024-06-03 19:38:46,056 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4496124031007752 [2024-06-03 19:38:46,056 INFO L175 Difference]: Start difference. First operand has 113 places, 145 transitions, 1184 flow. Second operand 9 states and 174 transitions. [2024-06-03 19:38:46,057 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 121 places, 185 transitions, 1842 flow [2024-06-03 19:38:46,086 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 114 places, 185 transitions, 1691 flow, removed 24 selfloop flow, removed 7 redundant places. [2024-06-03 19:38:46,089 INFO L231 Difference]: Finished difference. Result has 116 places, 154 transitions, 1329 flow [2024-06-03 19:38:46,089 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1033, PETRI_DIFFERENCE_MINUEND_PLACES=106, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=145, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1329, PETRI_PLACES=116, PETRI_TRANSITIONS=154} [2024-06-03 19:38:46,089 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 72 predicate places. [2024-06-03 19:38:46,089 INFO L495 AbstractCegarLoop]: Abstraction has has 116 places, 154 transitions, 1329 flow [2024-06-03 19:38:46,089 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:38:46,089 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:38:46,089 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:38:46,090 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-03 19:38:46,090 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)] === [2024-06-03 19:38:46,090 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:38:46,090 INFO L85 PathProgramCache]: Analyzing trace with hash 857953229, now seen corresponding path program 3 times [2024-06-03 19:38:46,090 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:38:46,090 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1043632161] [2024-06-03 19:38:46,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:38:46,091 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:38:46,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:38:47,490 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:38:47,490 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:38:47,490 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1043632161] [2024-06-03 19:38:47,490 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1043632161] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:38:47,490 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:38:47,490 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:38:47,491 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [962702365] [2024-06-03 19:38:47,491 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:38:47,491 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:38:47,491 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:38:47,491 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:38:47,491 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:38:47,616 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-03 19:38:47,617 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 154 transitions, 1329 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:38:47,617 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:38:47,617 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-03 19:38:47,617 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:38:48,451 INFO L124 PetriNetUnfolderBase]: 1983/3078 cut-off events. [2024-06-03 19:38:48,452 INFO L125 PetriNetUnfolderBase]: For 68898/68902 co-relation queries the response was YES. [2024-06-03 19:38:48,459 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18112 conditions, 3078 events. 1983/3078 cut-off events. For 68898/68902 co-relation queries the response was YES. Maximal size of possible extension queue 119. Compared 15535 event pairs, 540 based on Foata normal form. 6/3083 useless extension candidates. Maximal degree in co-relation 18063. Up to 2836 conditions per place. [2024-06-03 19:38:48,469 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 157 selfloop transitions, 32 changer transitions 0/195 dead transitions. [2024-06-03 19:38:48,469 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 125 places, 195 transitions, 1977 flow [2024-06-03 19:38:48,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 19:38:48,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 19:38:48,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 189 transitions. [2024-06-03 19:38:48,485 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43953488372093025 [2024-06-03 19:38:48,485 INFO L175 Difference]: Start difference. First operand has 116 places, 154 transitions, 1329 flow. Second operand 10 states and 189 transitions. [2024-06-03 19:38:48,485 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 125 places, 195 transitions, 1977 flow [2024-06-03 19:38:48,515 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 195 transitions, 1899 flow, removed 26 selfloop flow, removed 3 redundant places. [2024-06-03 19:38:48,517 INFO L231 Difference]: Finished difference. Result has 123 places, 160 transitions, 1405 flow [2024-06-03 19:38:48,517 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1251, PETRI_DIFFERENCE_MINUEND_PLACES=113, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=154, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=128, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1405, PETRI_PLACES=123, PETRI_TRANSITIONS=160} [2024-06-03 19:38:48,517 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 79 predicate places. [2024-06-03 19:38:48,517 INFO L495 AbstractCegarLoop]: Abstraction has has 123 places, 160 transitions, 1405 flow [2024-06-03 19:38:48,518 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:38:48,518 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:38:48,518 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:38:48,518 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-03 19:38:48,518 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)] === [2024-06-03 19:38:48,518 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:38:48,518 INFO L85 PathProgramCache]: Analyzing trace with hash 233997467, now seen corresponding path program 1 times [2024-06-03 19:38:48,518 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:38:48,518 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [874393271] [2024-06-03 19:38:48,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:38:48,518 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:38:48,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:38:49,470 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:38:49,470 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:38:49,470 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [874393271] [2024-06-03 19:38:49,471 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [874393271] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:38:49,471 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:38:49,471 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:38:49,471 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1567836421] [2024-06-03 19:38:49,471 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:38:49,473 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:38:49,473 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:38:49,474 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:38:49,474 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:38:49,616 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-03 19:38:49,616 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 160 transitions, 1405 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:38:49,616 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:38:49,616 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-03 19:38:49,616 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:38:50,237 INFO L124 PetriNetUnfolderBase]: 2000/3105 cut-off events. [2024-06-03 19:38:50,237 INFO L125 PetriNetUnfolderBase]: For 74386/74390 co-relation queries the response was YES. [2024-06-03 19:38:50,246 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18391 conditions, 3105 events. 2000/3105 cut-off events. For 74386/74390 co-relation queries the response was YES. Maximal size of possible extension queue 121. Compared 15723 event pairs, 536 based on Foata normal form. 8/3112 useless extension candidates. Maximal degree in co-relation 18340. Up to 2883 conditions per place. [2024-06-03 19:38:50,257 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 163 selfloop transitions, 23 changer transitions 0/192 dead transitions. [2024-06-03 19:38:50,257 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 131 places, 192 transitions, 1911 flow [2024-06-03 19:38:50,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:38:50,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:38:50,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 168 transitions. [2024-06-03 19:38:50,258 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43410852713178294 [2024-06-03 19:38:50,258 INFO L175 Difference]: Start difference. First operand has 123 places, 160 transitions, 1405 flow. Second operand 9 states and 168 transitions. [2024-06-03 19:38:50,258 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 131 places, 192 transitions, 1911 flow [2024-06-03 19:38:50,302 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 192 transitions, 1767 flow, removed 29 selfloop flow, removed 8 redundant places. [2024-06-03 19:38:50,304 INFO L231 Difference]: Finished difference. Result has 124 places, 162 transitions, 1358 flow [2024-06-03 19:38:50,304 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1261, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=160, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=137, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1358, PETRI_PLACES=124, PETRI_TRANSITIONS=162} [2024-06-03 19:38:50,305 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 80 predicate places. [2024-06-03 19:38:50,305 INFO L495 AbstractCegarLoop]: Abstraction has has 124 places, 162 transitions, 1358 flow [2024-06-03 19:38:50,305 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:38:50,305 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:38:50,305 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:38:50,305 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-03 19:38:50,305 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)] === [2024-06-03 19:38:50,305 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:38:50,305 INFO L85 PathProgramCache]: Analyzing trace with hash -1495056625, now seen corresponding path program 4 times [2024-06-03 19:38:50,306 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:38:50,306 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [97036012] [2024-06-03 19:38:50,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:38:50,306 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:38:50,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:38:51,441 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:38:51,441 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:38:51,441 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [97036012] [2024-06-03 19:38:51,441 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [97036012] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:38:51,441 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:38:51,441 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:38:51,441 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [355120795] [2024-06-03 19:38:51,441 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:38:51,441 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:38:51,442 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:38:51,442 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:38:51,442 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:38:51,556 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-03 19:38:51,557 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 124 places, 162 transitions, 1358 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:38:51,557 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:38:51,557 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-03 19:38:51,557 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:38:52,202 INFO L124 PetriNetUnfolderBase]: 1995/3098 cut-off events. [2024-06-03 19:38:52,202 INFO L125 PetriNetUnfolderBase]: For 78626/78630 co-relation queries the response was YES. [2024-06-03 19:38:52,211 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18525 conditions, 3098 events. 1995/3098 cut-off events. For 78626/78630 co-relation queries the response was YES. Maximal size of possible extension queue 121. Compared 15653 event pairs, 538 based on Foata normal form. 6/3103 useless extension candidates. Maximal degree in co-relation 18474. Up to 2867 conditions per place. [2024-06-03 19:38:52,223 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 156 selfloop transitions, 29 changer transitions 0/191 dead transitions. [2024-06-03 19:38:52,223 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 132 places, 191 transitions, 1820 flow [2024-06-03 19:38:52,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:38:52,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:38:52,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 170 transitions. [2024-06-03 19:38:52,224 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4392764857881137 [2024-06-03 19:38:52,224 INFO L175 Difference]: Start difference. First operand has 124 places, 162 transitions, 1358 flow. Second operand 9 states and 170 transitions. [2024-06-03 19:38:52,224 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 132 places, 191 transitions, 1820 flow [2024-06-03 19:38:52,309 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 191 transitions, 1695 flow, removed 41 selfloop flow, removed 7 redundant places. [2024-06-03 19:38:52,311 INFO L231 Difference]: Finished difference. Result has 126 places, 162 transitions, 1299 flow [2024-06-03 19:38:52,312 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1233, PETRI_DIFFERENCE_MINUEND_PLACES=117, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=162, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=133, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1299, PETRI_PLACES=126, PETRI_TRANSITIONS=162} [2024-06-03 19:38:52,312 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 82 predicate places. [2024-06-03 19:38:52,312 INFO L495 AbstractCegarLoop]: Abstraction has has 126 places, 162 transitions, 1299 flow [2024-06-03 19:38:52,312 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:38:52,312 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:38:52,312 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:38:52,313 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-03 19:38:52,313 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:38:52,313 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:38:52,313 INFO L85 PathProgramCache]: Analyzing trace with hash -827561541, now seen corresponding path program 1 times [2024-06-03 19:38:52,313 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:38:52,313 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1037863053] [2024-06-03 19:38:52,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:38:52,314 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:38:52,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:38:52,931 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:38:52,932 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:38:52,932 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1037863053] [2024-06-03 19:38:52,932 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1037863053] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:38:52,932 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:38:52,932 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 19:38:52,932 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1404168109] [2024-06-03 19:38:52,932 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:38:52,932 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 19:38:52,932 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:38:52,932 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 19:38:52,932 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-03 19:38:53,006 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-03 19:38:53,006 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 126 places, 162 transitions, 1299 flow. Second operand has 7 states, 7 states have (on average 12.0) internal successors, (84), 7 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:38:53,006 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:38:53,006 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-03 19:38:53,006 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:38:53,658 INFO L124 PetriNetUnfolderBase]: 2033/3139 cut-off events. [2024-06-03 19:38:53,658 INFO L125 PetriNetUnfolderBase]: For 83223/83223 co-relation queries the response was YES. [2024-06-03 19:38:53,667 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18874 conditions, 3139 events. 2033/3139 cut-off events. For 83223/83223 co-relation queries the response was YES. Maximal size of possible extension queue 122. Compared 15691 event pairs, 519 based on Foata normal form. 2/3140 useless extension candidates. Maximal degree in co-relation 18822. Up to 2907 conditions per place. [2024-06-03 19:38:53,678 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 148 selfloop transitions, 31 changer transitions 0/185 dead transitions. [2024-06-03 19:38:53,678 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 131 places, 185 transitions, 1825 flow [2024-06-03 19:38:53,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 19:38:53,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 19:38:53,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 118 transitions. [2024-06-03 19:38:53,679 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4573643410852713 [2024-06-03 19:38:53,679 INFO L175 Difference]: Start difference. First operand has 126 places, 162 transitions, 1299 flow. Second operand 6 states and 118 transitions. [2024-06-03 19:38:53,679 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 131 places, 185 transitions, 1825 flow [2024-06-03 19:38:53,710 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 185 transitions, 1735 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-06-03 19:38:53,712 INFO L231 Difference]: Finished difference. Result has 124 places, 168 transitions, 1348 flow [2024-06-03 19:38:53,713 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1209, PETRI_DIFFERENCE_MINUEND_PLACES=118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=162, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=134, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1348, PETRI_PLACES=124, PETRI_TRANSITIONS=168} [2024-06-03 19:38:53,713 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 80 predicate places. [2024-06-03 19:38:53,713 INFO L495 AbstractCegarLoop]: Abstraction has has 124 places, 168 transitions, 1348 flow [2024-06-03 19:38:53,713 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.0) internal successors, (84), 7 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:38:53,713 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:38:53,713 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:38:53,714 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-03 19:38:53,714 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)] === [2024-06-03 19:38:53,714 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:38:53,714 INFO L85 PathProgramCache]: Analyzing trace with hash 2117200963, now seen corresponding path program 5 times [2024-06-03 19:38:53,714 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:38:53,714 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [430875715] [2024-06-03 19:38:53,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:38:53,714 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:38:53,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:38:54,669 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:38:54,669 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:38:54,669 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [430875715] [2024-06-03 19:38:54,669 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [430875715] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:38:54,669 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:38:54,670 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:38:54,670 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [563461812] [2024-06-03 19:38:54,670 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:38:54,670 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:38:54,670 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:38:54,671 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:38:54,671 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:38:54,809 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-03 19:38:54,810 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 124 places, 168 transitions, 1348 flow. Second operand has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:38:54,810 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:38:54,810 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-03 19:38:54,810 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:38:55,356 INFO L124 PetriNetUnfolderBase]: 1909/3024 cut-off events. [2024-06-03 19:38:55,356 INFO L125 PetriNetUnfolderBase]: For 91463/91469 co-relation queries the response was YES. [2024-06-03 19:38:55,366 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19080 conditions, 3024 events. 1909/3024 cut-off events. For 91463/91469 co-relation queries the response was YES. Maximal size of possible extension queue 129. Compared 15922 event pairs, 550 based on Foata normal form. 14/3028 useless extension candidates. Maximal degree in co-relation 19027. Up to 2656 conditions per place. [2024-06-03 19:38:55,376 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 142 selfloop transitions, 39 changer transitions 0/193 dead transitions. [2024-06-03 19:38:55,376 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 131 places, 193 transitions, 1834 flow [2024-06-03 19:38:55,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:38:55,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:38:55,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 158 transitions. [2024-06-03 19:38:55,377 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45930232558139533 [2024-06-03 19:38:55,378 INFO L175 Difference]: Start difference. First operand has 124 places, 168 transitions, 1348 flow. Second operand 8 states and 158 transitions. [2024-06-03 19:38:55,378 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 131 places, 193 transitions, 1834 flow [2024-06-03 19:38:55,428 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 129 places, 193 transitions, 1801 flow, removed 12 selfloop flow, removed 2 redundant places. [2024-06-03 19:38:55,430 INFO L231 Difference]: Finished difference. Result has 130 places, 170 transitions, 1460 flow [2024-06-03 19:38:55,430 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1315, PETRI_DIFFERENCE_MINUEND_PLACES=122, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=168, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=129, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1460, PETRI_PLACES=130, PETRI_TRANSITIONS=170} [2024-06-03 19:38:55,430 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 86 predicate places. [2024-06-03 19:38:55,430 INFO L495 AbstractCegarLoop]: Abstraction has has 130 places, 170 transitions, 1460 flow [2024-06-03 19:38:55,430 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:38:55,431 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:38:55,431 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:38:55,431 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-03 19:38:55,431 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:38:55,431 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:38:55,431 INFO L85 PathProgramCache]: Analyzing trace with hash -985747217, now seen corresponding path program 6 times [2024-06-03 19:38:55,431 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:38:55,431 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1315945343] [2024-06-03 19:38:55,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:38:55,431 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:38:55,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:38:56,441 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:38:56,442 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:38:56,442 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1315945343] [2024-06-03 19:38:56,442 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1315945343] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:38:56,442 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:38:56,442 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:38:56,442 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [968970961] [2024-06-03 19:38:56,442 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:38:56,442 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:38:56,442 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:38:56,443 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:38:56,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:38:56,541 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-03 19:38:56,541 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 130 places, 170 transitions, 1460 flow. Second operand has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:38:56,541 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:38:56,541 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-03 19:38:56,541 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:38:57,174 INFO L124 PetriNetUnfolderBase]: 1965/3135 cut-off events. [2024-06-03 19:38:57,174 INFO L125 PetriNetUnfolderBase]: For 98983/98985 co-relation queries the response was YES. [2024-06-03 19:38:57,185 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19816 conditions, 3135 events. 1965/3135 cut-off events. For 98983/98985 co-relation queries the response was YES. Maximal size of possible extension queue 136. Compared 16497 event pairs, 457 based on Foata normal form. 10/3144 useless extension candidates. Maximal degree in co-relation 19761. Up to 2726 conditions per place. [2024-06-03 19:38:57,196 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 158 selfloop transitions, 58 changer transitions 0/228 dead transitions. [2024-06-03 19:38:57,196 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 138 places, 228 transitions, 2301 flow [2024-06-03 19:38:57,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:38:57,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:38:57,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 180 transitions. [2024-06-03 19:38:57,197 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46511627906976744 [2024-06-03 19:38:57,197 INFO L175 Difference]: Start difference. First operand has 130 places, 170 transitions, 1460 flow. Second operand 9 states and 180 transitions. [2024-06-03 19:38:57,197 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 138 places, 228 transitions, 2301 flow [2024-06-03 19:38:57,263 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 131 places, 228 transitions, 2144 flow, removed 28 selfloop flow, removed 7 redundant places. [2024-06-03 19:38:57,265 INFO L231 Difference]: Finished difference. Result has 135 places, 199 transitions, 1846 flow [2024-06-03 19:38:57,265 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1311, PETRI_DIFFERENCE_MINUEND_PLACES=123, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=170, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=120, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1846, PETRI_PLACES=135, PETRI_TRANSITIONS=199} [2024-06-03 19:38:57,266 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 91 predicate places. [2024-06-03 19:38:57,266 INFO L495 AbstractCegarLoop]: Abstraction has has 135 places, 199 transitions, 1846 flow [2024-06-03 19:38:57,266 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:38:57,266 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:38:57,266 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:38:57,266 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-03 19:38:57,266 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)] === [2024-06-03 19:38:57,267 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:38:57,267 INFO L85 PathProgramCache]: Analyzing trace with hash -62068375, now seen corresponding path program 2 times [2024-06-03 19:38:57,267 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:38:57,267 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [69237502] [2024-06-03 19:38:57,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:38:57,267 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:38:57,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:38:58,250 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:38:58,251 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:38:58,251 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [69237502] [2024-06-03 19:38:58,251 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [69237502] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:38:58,251 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:38:58,251 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:38:58,251 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1063064101] [2024-06-03 19:38:58,251 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:38:58,252 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:38:58,252 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:38:58,252 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:38:58,252 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:38:58,363 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-03 19:38:58,363 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 199 transitions, 1846 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:38:58,363 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:38:58,363 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-03 19:38:58,363 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:38:58,981 INFO L124 PetriNetUnfolderBase]: 2161/3339 cut-off events. [2024-06-03 19:38:58,981 INFO L125 PetriNetUnfolderBase]: For 104718/104722 co-relation queries the response was YES. [2024-06-03 19:38:58,992 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21168 conditions, 3339 events. 2161/3339 cut-off events. For 104718/104722 co-relation queries the response was YES. Maximal size of possible extension queue 138. Compared 16926 event pairs, 563 based on Foata normal form. 8/3346 useless extension candidates. Maximal degree in co-relation 21110. Up to 3063 conditions per place. [2024-06-03 19:38:59,005 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 183 selfloop transitions, 39 changer transitions 0/228 dead transitions. [2024-06-03 19:38:59,006 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 143 places, 228 transitions, 2430 flow [2024-06-03 19:38:59,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:38:59,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:38:59,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 168 transitions. [2024-06-03 19:38:59,007 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43410852713178294 [2024-06-03 19:38:59,007 INFO L175 Difference]: Start difference. First operand has 135 places, 199 transitions, 1846 flow. Second operand 9 states and 168 transitions. [2024-06-03 19:38:59,007 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 143 places, 228 transitions, 2430 flow [2024-06-03 19:38:59,086 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 140 places, 228 transitions, 2335 flow, removed 24 selfloop flow, removed 3 redundant places. [2024-06-03 19:38:59,089 INFO L231 Difference]: Finished difference. Result has 141 places, 201 transitions, 1888 flow [2024-06-03 19:38:59,089 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1751, PETRI_DIFFERENCE_MINUEND_PLACES=132, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=199, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=160, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1888, PETRI_PLACES=141, PETRI_TRANSITIONS=201} [2024-06-03 19:38:59,089 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 97 predicate places. [2024-06-03 19:38:59,089 INFO L495 AbstractCegarLoop]: Abstraction has has 141 places, 201 transitions, 1888 flow [2024-06-03 19:38:59,089 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:38:59,090 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:38:59,090 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:38:59,090 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-03 19:38:59,090 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)] === [2024-06-03 19:38:59,090 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:38:59,090 INFO L85 PathProgramCache]: Analyzing trace with hash 2117378903, now seen corresponding path program 5 times [2024-06-03 19:38:59,090 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:38:59,090 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [427011643] [2024-06-03 19:38:59,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:38:59,091 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:38:59,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:39:00,470 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:39:00,470 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:39:00,470 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [427011643] [2024-06-03 19:39:00,470 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [427011643] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:39:00,470 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:39:00,470 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:39:00,470 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1953789852] [2024-06-03 19:39:00,470 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:39:00,471 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:39:00,471 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:39:00,471 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:39:00,471 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:39:00,582 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-03 19:39:00,583 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 141 places, 201 transitions, 1888 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:39:00,583 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:39:00,583 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-03 19:39:00,583 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:39:01,267 INFO L124 PetriNetUnfolderBase]: 2194/3397 cut-off events. [2024-06-03 19:39:01,267 INFO L125 PetriNetUnfolderBase]: For 109926/109930 co-relation queries the response was YES. [2024-06-03 19:39:01,280 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21623 conditions, 3397 events. 2194/3397 cut-off events. For 109926/109930 co-relation queries the response was YES. Maximal size of possible extension queue 144. Compared 17376 event pairs, 563 based on Foata normal form. 6/3402 useless extension candidates. Maximal degree in co-relation 21564. Up to 3066 conditions per place. [2024-06-03 19:39:01,292 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 181 selfloop transitions, 50 changer transitions 0/237 dead transitions. [2024-06-03 19:39:01,292 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 149 places, 237 transitions, 2546 flow [2024-06-03 19:39:01,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:39:01,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:39:01,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 172 transitions. [2024-06-03 19:39:01,294 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4444444444444444 [2024-06-03 19:39:01,294 INFO L175 Difference]: Start difference. First operand has 141 places, 201 transitions, 1888 flow. Second operand 9 states and 172 transitions. [2024-06-03 19:39:01,294 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 149 places, 237 transitions, 2546 flow [2024-06-03 19:39:01,364 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 142 places, 237 transitions, 2427 flow, removed 22 selfloop flow, removed 7 redundant places. [2024-06-03 19:39:01,367 INFO L231 Difference]: Finished difference. Result has 144 places, 211 transitions, 2001 flow [2024-06-03 19:39:01,367 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1769, PETRI_DIFFERENCE_MINUEND_PLACES=134, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=201, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=157, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2001, PETRI_PLACES=144, PETRI_TRANSITIONS=211} [2024-06-03 19:39:01,368 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 100 predicate places. [2024-06-03 19:39:01,368 INFO L495 AbstractCegarLoop]: Abstraction has has 144 places, 211 transitions, 2001 flow [2024-06-03 19:39:01,368 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:39:01,368 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:39:01,368 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:39:01,368 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-03 19:39:01,368 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)] === [2024-06-03 19:39:01,369 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:39:01,369 INFO L85 PathProgramCache]: Analyzing trace with hash -1941406275, now seen corresponding path program 3 times [2024-06-03 19:39:01,369 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:39:01,369 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [573437084] [2024-06-03 19:39:01,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:39:01,370 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:39:01,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:39:02,362 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:39:02,363 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:39:02,363 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [573437084] [2024-06-03 19:39:02,363 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [573437084] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:39:02,363 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:39:02,363 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:39:02,363 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1736705472] [2024-06-03 19:39:02,363 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:39:02,363 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:39:02,364 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:39:02,364 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:39:02,364 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:39:02,511 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-03 19:39:02,511 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 144 places, 211 transitions, 2001 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:39:02,511 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:39:02,511 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-03 19:39:02,511 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:39:03,123 INFO L124 PetriNetUnfolderBase]: 2211/3424 cut-off events. [2024-06-03 19:39:03,123 INFO L125 PetriNetUnfolderBase]: For 119437/119441 co-relation queries the response was YES. [2024-06-03 19:39:03,135 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22480 conditions, 3424 events. 2211/3424 cut-off events. For 119437/119441 co-relation queries the response was YES. Maximal size of possible extension queue 146. Compared 17518 event pairs, 563 based on Foata normal form. 8/3431 useless extension candidates. Maximal degree in co-relation 22419. Up to 3102 conditions per place. [2024-06-03 19:39:03,146 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 184 selfloop transitions, 50 changer transitions 0/240 dead transitions. [2024-06-03 19:39:03,146 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 152 places, 240 transitions, 2615 flow [2024-06-03 19:39:03,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:39:03,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:39:03,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 169 transitions. [2024-06-03 19:39:03,147 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43669250645994834 [2024-06-03 19:39:03,147 INFO L175 Difference]: Start difference. First operand has 144 places, 211 transitions, 2001 flow. Second operand 9 states and 169 transitions. [2024-06-03 19:39:03,147 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 152 places, 240 transitions, 2615 flow [2024-06-03 19:39:03,213 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 148 places, 240 transitions, 2473 flow, removed 34 selfloop flow, removed 4 redundant places. [2024-06-03 19:39:03,216 INFO L231 Difference]: Finished difference. Result has 149 places, 213 transitions, 2024 flow [2024-06-03 19:39:03,216 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1859, PETRI_DIFFERENCE_MINUEND_PLACES=140, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=211, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=161, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2024, PETRI_PLACES=149, PETRI_TRANSITIONS=213} [2024-06-03 19:39:03,217 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 105 predicate places. [2024-06-03 19:39:03,217 INFO L495 AbstractCegarLoop]: Abstraction has has 149 places, 213 transitions, 2024 flow [2024-06-03 19:39:03,217 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:39:03,217 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:39:03,217 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:39:03,217 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-03 19:39:03,217 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)] === [2024-06-03 19:39:03,218 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:39:03,218 INFO L85 PathProgramCache]: Analyzing trace with hash 2117385661, now seen corresponding path program 4 times [2024-06-03 19:39:03,218 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:39:03,218 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1031330268] [2024-06-03 19:39:03,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:39:03,218 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:39:03,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:39:04,203 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:39:04,203 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:39:04,203 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1031330268] [2024-06-03 19:39:04,204 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1031330268] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:39:04,204 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:39:04,204 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:39:04,204 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1116139415] [2024-06-03 19:39:04,204 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:39:04,204 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:39:04,204 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:39:04,205 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:39:04,205 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:39:04,304 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-03 19:39:04,304 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 149 places, 213 transitions, 2024 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:39:04,305 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:39:04,305 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-03 19:39:04,305 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:39:04,943 INFO L124 PetriNetUnfolderBase]: 2228/3451 cut-off events. [2024-06-03 19:39:04,943 INFO L125 PetriNetUnfolderBase]: For 127342/127346 co-relation queries the response was YES. [2024-06-03 19:39:04,956 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23008 conditions, 3451 events. 2228/3451 cut-off events. For 127342/127346 co-relation queries the response was YES. Maximal size of possible extension queue 148. Compared 17696 event pairs, 568 based on Foata normal form. 8/3458 useless extension candidates. Maximal degree in co-relation 22946. Up to 3165 conditions per place. [2024-06-03 19:39:04,969 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 198 selfloop transitions, 38 changer transitions 0/242 dead transitions. [2024-06-03 19:39:04,969 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 157 places, 242 transitions, 2646 flow [2024-06-03 19:39:04,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:39:04,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:39:04,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 169 transitions. [2024-06-03 19:39:04,970 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43669250645994834 [2024-06-03 19:39:04,970 INFO L175 Difference]: Start difference. First operand has 149 places, 213 transitions, 2024 flow. Second operand 9 states and 169 transitions. [2024-06-03 19:39:04,970 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 157 places, 242 transitions, 2646 flow [2024-06-03 19:39:05,050 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 150 places, 242 transitions, 2499 flow, removed 25 selfloop flow, removed 7 redundant places. [2024-06-03 19:39:05,053 INFO L231 Difference]: Finished difference. Result has 151 places, 215 transitions, 2022 flow [2024-06-03 19:39:05,053 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1877, PETRI_DIFFERENCE_MINUEND_PLACES=142, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=213, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=175, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2022, PETRI_PLACES=151, PETRI_TRANSITIONS=215} [2024-06-03 19:39:05,053 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 107 predicate places. [2024-06-03 19:39:05,053 INFO L495 AbstractCegarLoop]: Abstraction has has 151 places, 215 transitions, 2022 flow [2024-06-03 19:39:05,053 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:39:05,054 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:39:05,054 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:39:05,054 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-03 19:39:05,054 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)] === [2024-06-03 19:39:05,054 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:39:05,054 INFO L85 PathProgramCache]: Analyzing trace with hash 2117385413, now seen corresponding path program 6 times [2024-06-03 19:39:05,054 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:39:05,054 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [809525340] [2024-06-03 19:39:05,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:39:05,055 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:39:05,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:39:06,567 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:39:06,567 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:39:06,568 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [809525340] [2024-06-03 19:39:06,568 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [809525340] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:39:06,568 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:39:06,568 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:39:06,568 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1679066979] [2024-06-03 19:39:06,568 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:39:06,568 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:39:06,569 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:39:06,569 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:39:06,569 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:39:06,700 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-03 19:39:06,701 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 151 places, 215 transitions, 2022 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:39:06,701 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:39:06,701 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-03 19:39:06,701 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:39:07,465 INFO L124 PetriNetUnfolderBase]: 2255/3495 cut-off events. [2024-06-03 19:39:07,465 INFO L125 PetriNetUnfolderBase]: For 135691/135695 co-relation queries the response was YES. [2024-06-03 19:39:07,479 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23693 conditions, 3495 events. 2255/3495 cut-off events. For 135691/135695 co-relation queries the response was YES. Maximal size of possible extension queue 151. Compared 17934 event pairs, 568 based on Foata normal form. 6/3500 useless extension candidates. Maximal degree in co-relation 23630. Up to 3130 conditions per place. [2024-06-03 19:39:07,536 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 188 selfloop transitions, 59 changer transitions 0/253 dead transitions. [2024-06-03 19:39:07,536 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 160 places, 253 transitions, 2906 flow [2024-06-03 19:39:07,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 19:39:07,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 19:39:07,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 192 transitions. [2024-06-03 19:39:07,538 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44651162790697674 [2024-06-03 19:39:07,538 INFO L175 Difference]: Start difference. First operand has 151 places, 215 transitions, 2022 flow. Second operand 10 states and 192 transitions. [2024-06-03 19:39:07,538 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 160 places, 253 transitions, 2906 flow [2024-06-03 19:39:07,618 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 153 places, 253 transitions, 2779 flow, removed 27 selfloop flow, removed 7 redundant places. [2024-06-03 19:39:07,621 INFO L231 Difference]: Finished difference. Result has 154 places, 221 transitions, 2191 flow [2024-06-03 19:39:07,621 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1895, PETRI_DIFFERENCE_MINUEND_PLACES=144, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=215, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=159, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2191, PETRI_PLACES=154, PETRI_TRANSITIONS=221} [2024-06-03 19:39:07,622 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 110 predicate places. [2024-06-03 19:39:07,622 INFO L495 AbstractCegarLoop]: Abstraction has has 154 places, 221 transitions, 2191 flow [2024-06-03 19:39:07,622 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:39:07,622 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:39:07,622 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:39:07,622 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-03 19:39:07,622 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)] === [2024-06-03 19:39:07,623 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:39:07,623 INFO L85 PathProgramCache]: Analyzing trace with hash 131417657, now seen corresponding path program 7 times [2024-06-03 19:39:07,623 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:39:07,623 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [983060244] [2024-06-03 19:39:07,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:39:07,623 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:39:07,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:39:09,042 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:39:09,043 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:39:09,043 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [983060244] [2024-06-03 19:39:09,043 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [983060244] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:39:09,043 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:39:09,043 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:39:09,043 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [280218239] [2024-06-03 19:39:09,043 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:39:09,043 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:39:09,043 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:39:09,043 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:39:09,043 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:39:09,157 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-03 19:39:09,157 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 154 places, 221 transitions, 2191 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:39:09,157 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:39:09,157 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-03 19:39:09,157 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:39:09,993 INFO L124 PetriNetUnfolderBase]: 2250/3488 cut-off events. [2024-06-03 19:39:09,993 INFO L125 PetriNetUnfolderBase]: For 143018/143022 co-relation queries the response was YES. [2024-06-03 19:39:10,005 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24042 conditions, 3488 events. 2250/3488 cut-off events. For 143018/143022 co-relation queries the response was YES. Maximal size of possible extension queue 151. Compared 17900 event pairs, 568 based on Foata normal form. 6/3493 useless extension candidates. Maximal degree in co-relation 23978. Up to 3152 conditions per place. [2024-06-03 19:39:10,017 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 190 selfloop transitions, 51 changer transitions 0/247 dead transitions. [2024-06-03 19:39:10,017 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 162 places, 247 transitions, 2763 flow [2024-06-03 19:39:10,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:39:10,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:39:10,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 171 transitions. [2024-06-03 19:39:10,018 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4418604651162791 [2024-06-03 19:39:10,018 INFO L175 Difference]: Start difference. First operand has 154 places, 221 transitions, 2191 flow. Second operand 9 states and 171 transitions. [2024-06-03 19:39:10,018 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 162 places, 247 transitions, 2763 flow [2024-06-03 19:39:10,117 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 156 places, 247 transitions, 2564 flow, removed 71 selfloop flow, removed 6 redundant places. [2024-06-03 19:39:10,120 INFO L231 Difference]: Finished difference. Result has 157 places, 221 transitions, 2102 flow [2024-06-03 19:39:10,120 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1992, PETRI_DIFFERENCE_MINUEND_PLACES=148, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=221, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=170, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2102, PETRI_PLACES=157, PETRI_TRANSITIONS=221} [2024-06-03 19:39:10,120 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 113 predicate places. [2024-06-03 19:39:10,120 INFO L495 AbstractCegarLoop]: Abstraction has has 157 places, 221 transitions, 2102 flow [2024-06-03 19:39:10,120 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:39:10,121 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:39:10,121 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:39:10,121 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-03 19:39:10,121 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)] === [2024-06-03 19:39:10,121 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:39:10,121 INFO L85 PathProgramCache]: Analyzing trace with hash -1941406523, now seen corresponding path program 8 times [2024-06-03 19:39:10,121 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:39:10,121 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [111513312] [2024-06-03 19:39:10,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:39:10,121 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:39:10,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:39:11,439 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:39:11,439 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:39:11,439 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [111513312] [2024-06-03 19:39:11,440 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [111513312] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:39:11,440 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:39:11,440 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:39:11,440 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [257205679] [2024-06-03 19:39:11,440 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:39:11,441 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:39:11,441 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:39:11,441 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:39:11,441 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:39:11,585 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-03 19:39:11,585 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 157 places, 221 transitions, 2102 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:39:11,585 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:39:11,585 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-03 19:39:11,586 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:39:12,492 INFO L124 PetriNetUnfolderBase]: 2261/3504 cut-off events. [2024-06-03 19:39:12,492 INFO L125 PetriNetUnfolderBase]: For 150492/150496 co-relation queries the response was YES. [2024-06-03 19:39:12,505 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24385 conditions, 3504 events. 2261/3504 cut-off events. For 150492/150496 co-relation queries the response was YES. Maximal size of possible extension queue 152. Compared 18061 event pairs, 568 based on Foata normal form. 6/3509 useless extension candidates. Maximal degree in co-relation 24319. Up to 3053 conditions per place. [2024-06-03 19:39:12,517 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 171 selfloop transitions, 88 changer transitions 0/265 dead transitions. [2024-06-03 19:39:12,517 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 167 places, 265 transitions, 3064 flow [2024-06-03 19:39:12,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-03 19:39:12,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-03 19:39:12,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 209 transitions. [2024-06-03 19:39:12,518 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4418604651162791 [2024-06-03 19:39:12,518 INFO L175 Difference]: Start difference. First operand has 157 places, 221 transitions, 2102 flow. Second operand 11 states and 209 transitions. [2024-06-03 19:39:12,518 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 167 places, 265 transitions, 3064 flow [2024-06-03 19:39:12,587 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 159 places, 265 transitions, 2932 flow, removed 6 selfloop flow, removed 8 redundant places. [2024-06-03 19:39:12,590 INFO L231 Difference]: Finished difference. Result has 160 places, 229 transitions, 2357 flow [2024-06-03 19:39:12,590 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=1974, PETRI_DIFFERENCE_MINUEND_PLACES=149, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=221, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=83, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=138, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2357, PETRI_PLACES=160, PETRI_TRANSITIONS=229} [2024-06-03 19:39:12,590 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 116 predicate places. [2024-06-03 19:39:12,590 INFO L495 AbstractCegarLoop]: Abstraction has has 160 places, 229 transitions, 2357 flow [2024-06-03 19:39:12,590 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:39:12,590 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:39:12,590 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:39:12,590 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-03 19:39:12,591 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:39:12,591 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:39:12,591 INFO L85 PathProgramCache]: Analyzing trace with hash -53497495, now seen corresponding path program 5 times [2024-06-03 19:39:12,591 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:39:12,591 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1708383345] [2024-06-03 19:39:12,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:39:12,591 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:39:12,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:39:13,576 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:39:13,576 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:39:13,576 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1708383345] [2024-06-03 19:39:13,576 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1708383345] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:39:13,576 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:39:13,576 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:39:13,576 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [270575275] [2024-06-03 19:39:13,577 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:39:13,577 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:39:13,577 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:39:13,577 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:39:13,577 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:39:13,686 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-03 19:39:13,687 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 160 places, 229 transitions, 2357 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:39:13,687 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:39:13,687 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-03 19:39:13,687 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:39:14,400 INFO L124 PetriNetUnfolderBase]: 2373/3688 cut-off events. [2024-06-03 19:39:14,400 INFO L125 PetriNetUnfolderBase]: For 173015/173019 co-relation queries the response was YES. [2024-06-03 19:39:14,414 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26631 conditions, 3688 events. 2373/3688 cut-off events. For 173015/173019 co-relation queries the response was YES. Maximal size of possible extension queue 166. Compared 19376 event pairs, 559 based on Foata normal form. 8/3695 useless extension candidates. Maximal degree in co-relation 26564. Up to 2913 conditions per place. [2024-06-03 19:39:14,428 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 172 selfloop transitions, 93 changer transitions 0/271 dead transitions. [2024-06-03 19:39:14,428 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 168 places, 271 transitions, 3427 flow [2024-06-03 19:39:14,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:39:14,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:39:14,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 181 transitions. [2024-06-03 19:39:14,429 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46770025839793283 [2024-06-03 19:39:14,429 INFO L175 Difference]: Start difference. First operand has 160 places, 229 transitions, 2357 flow. Second operand 9 states and 181 transitions. [2024-06-03 19:39:14,429 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 168 places, 271 transitions, 3427 flow [2024-06-03 19:39:14,548 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 162 places, 271 transitions, 3195 flow, removed 55 selfloop flow, removed 6 redundant places. [2024-06-03 19:39:14,551 INFO L231 Difference]: Finished difference. Result has 164 places, 234 transitions, 2491 flow [2024-06-03 19:39:14,551 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2133, PETRI_DIFFERENCE_MINUEND_PLACES=154, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=229, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=89, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=137, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2491, PETRI_PLACES=164, PETRI_TRANSITIONS=234} [2024-06-03 19:39:14,551 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 120 predicate places. [2024-06-03 19:39:14,551 INFO L495 AbstractCegarLoop]: Abstraction has has 164 places, 234 transitions, 2491 flow [2024-06-03 19:39:14,552 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:39:14,552 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:39:14,552 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:39:14,552 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-03 19:39:14,552 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:39:14,552 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:39:14,552 INFO L85 PathProgramCache]: Analyzing trace with hash -62075133, now seen corresponding path program 9 times [2024-06-03 19:39:14,552 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:39:14,552 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [16528205] [2024-06-03 19:39:14,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:39:14,552 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:39:14,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:39:15,855 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:39:15,855 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:39:15,855 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [16528205] [2024-06-03 19:39:15,855 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [16528205] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:39:15,855 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:39:15,855 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:39:15,856 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2068915254] [2024-06-03 19:39:15,856 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:39:15,856 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:39:15,856 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:39:15,856 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:39:15,856 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:39:15,947 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-03 19:39:15,947 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 164 places, 234 transitions, 2491 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:39:15,947 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:39:15,947 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-03 19:39:15,947 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:39:16,693 INFO L124 PetriNetUnfolderBase]: 2368/3681 cut-off events. [2024-06-03 19:39:16,693 INFO L125 PetriNetUnfolderBase]: For 178030/178034 co-relation queries the response was YES. [2024-06-03 19:39:16,708 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26716 conditions, 3681 events. 2368/3681 cut-off events. For 178030/178034 co-relation queries the response was YES. Maximal size of possible extension queue 165. Compared 19288 event pairs, 602 based on Foata normal form. 6/3686 useless extension candidates. Maximal degree in co-relation 26647. Up to 3345 conditions per place. [2024-06-03 19:39:16,723 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 200 selfloop transitions, 54 changer transitions 0/260 dead transitions. [2024-06-03 19:39:16,723 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 172 places, 260 transitions, 3089 flow [2024-06-03 19:39:16,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:39:16,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:39:16,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 170 transitions. [2024-06-03 19:39:16,726 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4392764857881137 [2024-06-03 19:39:16,726 INFO L175 Difference]: Start difference. First operand has 164 places, 234 transitions, 2491 flow. Second operand 9 states and 170 transitions. [2024-06-03 19:39:16,726 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 172 places, 260 transitions, 3089 flow [2024-06-03 19:39:16,857 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 167 places, 260 transitions, 2868 flow, removed 62 selfloop flow, removed 5 redundant places. [2024-06-03 19:39:16,860 INFO L231 Difference]: Finished difference. Result has 168 places, 234 transitions, 2386 flow [2024-06-03 19:39:16,861 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2270, PETRI_DIFFERENCE_MINUEND_PLACES=159, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=234, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=180, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2386, PETRI_PLACES=168, PETRI_TRANSITIONS=234} [2024-06-03 19:39:16,861 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 124 predicate places. [2024-06-03 19:39:16,861 INFO L495 AbstractCegarLoop]: Abstraction has has 168 places, 234 transitions, 2386 flow [2024-06-03 19:39:16,861 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:39:16,861 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:39:16,861 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:39:16,861 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-03 19:39:16,862 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:39:16,862 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:39:16,862 INFO L85 PathProgramCache]: Analyzing trace with hash -1801436739, now seen corresponding path program 2 times [2024-06-03 19:39:16,862 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:39:16,862 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [540993549] [2024-06-03 19:39:16,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:39:16,862 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:39:16,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:39:17,502 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:39:17,503 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:39:17,503 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [540993549] [2024-06-03 19:39:17,503 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [540993549] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:39:17,503 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:39:17,503 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 19:39:17,503 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2043207916] [2024-06-03 19:39:17,503 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:39:17,503 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 19:39:17,504 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:39:17,504 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 19:39:17,504 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-03 19:39:17,559 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-03 19:39:17,560 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 168 places, 234 transitions, 2386 flow. Second operand has 7 states, 7 states have (on average 12.0) internal successors, (84), 7 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:39:17,560 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:39:17,560 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-03 19:39:17,560 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:39:18,315 INFO L124 PetriNetUnfolderBase]: 2362/3669 cut-off events. [2024-06-03 19:39:18,315 INFO L125 PetriNetUnfolderBase]: For 183121/183121 co-relation queries the response was YES. [2024-06-03 19:39:18,329 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26715 conditions, 3669 events. 2362/3669 cut-off events. For 183121/183121 co-relation queries the response was YES. Maximal size of possible extension queue 163. Compared 19142 event pairs, 564 based on Foata normal form. 2/3670 useless extension candidates. Maximal degree in co-relation 26644. Up to 3409 conditions per place. [2024-06-03 19:39:18,341 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 200 selfloop transitions, 38 changer transitions 0/244 dead transitions. [2024-06-03 19:39:18,341 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 173 places, 244 transitions, 2914 flow [2024-06-03 19:39:18,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 19:39:18,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 19:39:18,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 112 transitions. [2024-06-03 19:39:18,342 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43410852713178294 [2024-06-03 19:39:18,342 INFO L175 Difference]: Start difference. First operand has 168 places, 234 transitions, 2386 flow. Second operand 6 states and 112 transitions. [2024-06-03 19:39:18,342 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 173 places, 244 transitions, 2914 flow [2024-06-03 19:39:18,435 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 165 places, 244 transitions, 2776 flow, removed 11 selfloop flow, removed 8 redundant places. [2024-06-03 19:39:18,438 INFO L231 Difference]: Finished difference. Result has 166 places, 234 transitions, 2330 flow [2024-06-03 19:39:18,438 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2248, PETRI_DIFFERENCE_MINUEND_PLACES=160, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=234, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=196, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2330, PETRI_PLACES=166, PETRI_TRANSITIONS=234} [2024-06-03 19:39:18,438 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 122 predicate places. [2024-06-03 19:39:18,439 INFO L495 AbstractCegarLoop]: Abstraction has has 166 places, 234 transitions, 2330 flow [2024-06-03 19:39:18,439 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.0) internal successors, (84), 7 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:39:18,439 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:39:18,439 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:39:18,439 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-03 19:39:18,439 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:39:18,439 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:39:18,439 INFO L85 PathProgramCache]: Analyzing trace with hash -420868859, now seen corresponding path program 1 times [2024-06-03 19:39:18,440 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:39:18,440 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1296911888] [2024-06-03 19:39:18,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:39:18,440 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:39:18,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:39:19,089 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:39:19,090 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:39:19,090 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1296911888] [2024-06-03 19:39:19,090 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1296911888] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:39:19,090 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:39:19,090 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 19:39:19,090 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2090719714] [2024-06-03 19:39:19,090 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:39:19,090 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 19:39:19,090 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:39:19,090 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 19:39:19,091 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-03 19:39:19,149 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-03 19:39:19,150 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 166 places, 234 transitions, 2330 flow. Second operand has 7 states, 7 states have (on average 13.0) internal successors, (91), 7 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) [2024-06-03 19:39:19,150 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:39:19,150 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-03 19:39:19,150 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:39:19,744 INFO L124 PetriNetUnfolderBase]: 2160/3447 cut-off events. [2024-06-03 19:39:19,744 INFO L125 PetriNetUnfolderBase]: For 166414/166414 co-relation queries the response was YES. [2024-06-03 19:39:19,760 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24454 conditions, 3447 events. 2160/3447 cut-off events. For 166414/166414 co-relation queries the response was YES. Maximal size of possible extension queue 162. Compared 18565 event pairs, 563 based on Foata normal form. 1/3447 useless extension candidates. Maximal degree in co-relation 24382. Up to 3193 conditions per place. [2024-06-03 19:39:19,775 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 228 selfloop transitions, 17 changer transitions 0/252 dead transitions. [2024-06-03 19:39:19,775 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 171 places, 252 transitions, 2988 flow [2024-06-03 19:39:19,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 19:39:19,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 19:39:19,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 118 transitions. [2024-06-03 19:39:19,776 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4573643410852713 [2024-06-03 19:39:19,776 INFO L175 Difference]: Start difference. First operand has 166 places, 234 transitions, 2330 flow. Second operand 6 states and 118 transitions. [2024-06-03 19:39:19,776 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 171 places, 252 transitions, 2988 flow [2024-06-03 19:39:19,907 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 166 places, 252 transitions, 2879 flow, removed 3 selfloop flow, removed 5 redundant places. [2024-06-03 19:39:19,909 INFO L231 Difference]: Finished difference. Result has 167 places, 240 transitions, 2323 flow [2024-06-03 19:39:19,910 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2221, PETRI_DIFFERENCE_MINUEND_PLACES=161, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=234, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=220, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2323, PETRI_PLACES=167, PETRI_TRANSITIONS=240} [2024-06-03 19:39:19,910 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 123 predicate places. [2024-06-03 19:39:19,910 INFO L495 AbstractCegarLoop]: Abstraction has has 167 places, 240 transitions, 2323 flow [2024-06-03 19:39:19,910 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.0) internal successors, (91), 7 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) [2024-06-03 19:39:19,910 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:39:19,910 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:39:19,910 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-03 19:39:19,910 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:39:19,911 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:39:19,911 INFO L85 PathProgramCache]: Analyzing trace with hash -828158817, now seen corresponding path program 2 times [2024-06-03 19:39:19,911 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:39:19,911 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [742449473] [2024-06-03 19:39:19,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:39:19,911 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:39:19,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:39:20,541 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:39:20,542 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:39:20,542 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [742449473] [2024-06-03 19:39:20,542 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [742449473] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:39:20,542 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:39:20,542 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 19:39:20,542 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1078319648] [2024-06-03 19:39:20,542 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:39:20,542 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 19:39:20,542 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:39:20,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 19:39:20,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-03 19:39:20,608 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-03 19:39:20,608 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 167 places, 240 transitions, 2323 flow. Second operand has 7 states, 7 states have (on average 13.0) internal successors, (91), 7 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) [2024-06-03 19:39:20,608 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:39:20,608 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-03 19:39:20,608 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:39:21,196 INFO L124 PetriNetUnfolderBase]: 2157/3443 cut-off events. [2024-06-03 19:39:21,196 INFO L125 PetriNetUnfolderBase]: For 172972/172972 co-relation queries the response was YES. [2024-06-03 19:39:21,210 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24838 conditions, 3443 events. 2157/3443 cut-off events. For 172972/172972 co-relation queries the response was YES. Maximal size of possible extension queue 162. Compared 18534 event pairs, 562 based on Foata normal form. 1/3443 useless extension candidates. Maximal degree in co-relation 24765. Up to 3202 conditions per place. [2024-06-03 19:39:21,222 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 229 selfloop transitions, 12 changer transitions 0/248 dead transitions. [2024-06-03 19:39:21,222 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 172 places, 248 transitions, 2829 flow [2024-06-03 19:39:21,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 19:39:21,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 19:39:21,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 112 transitions. [2024-06-03 19:39:21,223 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43410852713178294 [2024-06-03 19:39:21,223 INFO L175 Difference]: Start difference. First operand has 167 places, 240 transitions, 2323 flow. Second operand 6 states and 112 transitions. [2024-06-03 19:39:21,223 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 172 places, 248 transitions, 2829 flow [2024-06-03 19:39:21,349 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 170 places, 248 transitions, 2780 flow, removed 20 selfloop flow, removed 2 redundant places. [2024-06-03 19:39:21,352 INFO L231 Difference]: Finished difference. Result has 171 places, 240 transitions, 2304 flow [2024-06-03 19:39:21,352 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2274, PETRI_DIFFERENCE_MINUEND_PLACES=165, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=240, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=228, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2304, PETRI_PLACES=171, PETRI_TRANSITIONS=240} [2024-06-03 19:39:21,353 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 127 predicate places. [2024-06-03 19:39:21,353 INFO L495 AbstractCegarLoop]: Abstraction has has 171 places, 240 transitions, 2304 flow [2024-06-03 19:39:21,353 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.0) internal successors, (91), 7 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) [2024-06-03 19:39:21,353 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:39:21,353 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:39:21,353 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-03 19:39:21,353 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:39:21,354 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:39:21,354 INFO L85 PathProgramCache]: Analyzing trace with hash -1801422851, now seen corresponding path program 1 times [2024-06-03 19:39:21,354 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:39:21,354 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1282204514] [2024-06-03 19:39:21,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:39:21,354 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:39:21,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:39:22,050 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:39:22,050 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:39:22,050 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1282204514] [2024-06-03 19:39:22,050 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1282204514] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:39:22,050 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:39:22,050 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 19:39:22,050 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [817816310] [2024-06-03 19:39:22,050 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:39:22,051 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 19:39:22,051 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:39:22,051 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 19:39:22,051 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-03 19:39:22,127 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-03 19:39:22,127 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 171 places, 240 transitions, 2304 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) [2024-06-03 19:39:22,127 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:39:22,127 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-03 19:39:22,127 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:39:22,890 INFO L124 PetriNetUnfolderBase]: 2267/3551 cut-off events. [2024-06-03 19:39:22,890 INFO L125 PetriNetUnfolderBase]: For 177860/177860 co-relation queries the response was YES. [2024-06-03 19:39:22,905 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25647 conditions, 3551 events. 2267/3551 cut-off events. For 177860/177860 co-relation queries the response was YES. Maximal size of possible extension queue 161. Compared 18648 event pairs, 598 based on Foata normal form. 2/3552 useless extension candidates. Maximal degree in co-relation 25572. Up to 3393 conditions per place. [2024-06-03 19:39:22,917 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 233 selfloop transitions, 15 changer transitions 0/253 dead transitions. [2024-06-03 19:39:22,917 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 177 places, 253 transitions, 2860 flow [2024-06-03 19:39:22,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 19:39:22,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 19:39:22,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 122 transitions. [2024-06-03 19:39:22,918 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4053156146179402 [2024-06-03 19:39:22,918 INFO L175 Difference]: Start difference. First operand has 171 places, 240 transitions, 2304 flow. Second operand 7 states and 122 transitions. [2024-06-03 19:39:22,918 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 177 places, 253 transitions, 2860 flow [2024-06-03 19:39:23,043 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 172 places, 253 transitions, 2828 flow, removed 2 selfloop flow, removed 5 redundant places. [2024-06-03 19:39:23,046 INFO L231 Difference]: Finished difference. Result has 173 places, 243 transitions, 2346 flow [2024-06-03 19:39:23,046 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2272, PETRI_DIFFERENCE_MINUEND_PLACES=166, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=240, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=225, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2346, PETRI_PLACES=173, PETRI_TRANSITIONS=243} [2024-06-03 19:39:23,047 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 129 predicate places. [2024-06-03 19:39:23,047 INFO L495 AbstractCegarLoop]: Abstraction has has 173 places, 243 transitions, 2346 flow [2024-06-03 19:39:23,047 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) [2024-06-03 19:39:23,047 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:39:23,047 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:39:23,047 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-03 19:39:23,047 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)] === [2024-06-03 19:39:23,048 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:39:23,048 INFO L85 PathProgramCache]: Analyzing trace with hash -1480111959, now seen corresponding path program 1 times [2024-06-03 19:39:23,048 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:39:23,048 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1065920621] [2024-06-03 19:39:23,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:39:23,048 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:39:23,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:39:24,321 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:39:24,321 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:39:24,321 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1065920621] [2024-06-03 19:39:24,321 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1065920621] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:39:24,321 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:39:24,321 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-03 19:39:24,322 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [678812187] [2024-06-03 19:39:24,322 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:39:24,322 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-03 19:39:24,322 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:39:24,322 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-03 19:39:24,324 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-03 19:39:24,451 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-03 19:39:24,451 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 173 places, 243 transitions, 2346 flow. Second operand has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:39:24,451 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:39:24,451 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-03 19:39:24,451 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:39:25,304 INFO L124 PetriNetUnfolderBase]: 2416/3784 cut-off events. [2024-06-03 19:39:25,305 INFO L125 PetriNetUnfolderBase]: For 225092/225094 co-relation queries the response was YES. [2024-06-03 19:39:25,322 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28709 conditions, 3784 events. 2416/3784 cut-off events. For 225092/225094 co-relation queries the response was YES. Maximal size of possible extension queue 171. Compared 20159 event pairs, 572 based on Foata normal form. 18/3801 useless extension candidates. Maximal degree in co-relation 28633. Up to 3328 conditions per place. [2024-06-03 19:39:25,337 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 206 selfloop transitions, 70 changer transitions 0/282 dead transitions. [2024-06-03 19:39:25,337 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 182 places, 282 transitions, 3108 flow [2024-06-03 19:39:25,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 19:39:25,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 19:39:25,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 190 transitions. [2024-06-03 19:39:25,338 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4418604651162791 [2024-06-03 19:39:25,338 INFO L175 Difference]: Start difference. First operand has 173 places, 243 transitions, 2346 flow. Second operand 10 states and 190 transitions. [2024-06-03 19:39:25,338 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 182 places, 282 transitions, 3108 flow [2024-06-03 19:39:25,492 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 177 places, 282 transitions, 3056 flow, removed 13 selfloop flow, removed 5 redundant places. [2024-06-03 19:39:25,495 INFO L231 Difference]: Finished difference. Result has 178 places, 244 transitions, 2497 flow [2024-06-03 19:39:25,495 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2294, PETRI_DIFFERENCE_MINUEND_PLACES=168, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=243, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=173, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2497, PETRI_PLACES=178, PETRI_TRANSITIONS=244} [2024-06-03 19:39:25,495 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 134 predicate places. [2024-06-03 19:39:25,495 INFO L495 AbstractCegarLoop]: Abstraction has has 178 places, 244 transitions, 2497 flow [2024-06-03 19:39:25,496 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:39:25,496 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:39:25,496 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:39:25,496 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-03 19:39:25,496 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)] === [2024-06-03 19:39:25,496 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:39:25,496 INFO L85 PathProgramCache]: Analyzing trace with hash 1190574717, now seen corresponding path program 2 times [2024-06-03 19:39:25,496 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:39:25,496 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [634823018] [2024-06-03 19:39:25,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:39:25,496 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:39:25,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:39:26,642 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:39:26,643 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:39:26,643 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [634823018] [2024-06-03 19:39:26,643 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [634823018] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:39:26,643 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:39:26,643 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-03 19:39:26,643 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [498387674] [2024-06-03 19:39:26,643 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:39:26,643 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-03 19:39:26,643 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:39:26,643 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-03 19:39:26,644 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-03 19:39:26,784 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-03 19:39:26,784 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 178 places, 244 transitions, 2497 flow. Second operand has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:39:26,784 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:39:26,784 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-03 19:39:26,784 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:39:27,746 INFO L124 PetriNetUnfolderBase]: 2629/4134 cut-off events. [2024-06-03 19:39:27,746 INFO L125 PetriNetUnfolderBase]: For 269110/269110 co-relation queries the response was YES. [2024-06-03 19:39:27,765 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33282 conditions, 4134 events. 2629/4134 cut-off events. For 269110/269110 co-relation queries the response was YES. Maximal size of possible extension queue 198. Compared 22590 event pairs, 574 based on Foata normal form. 12/4145 useless extension candidates. Maximal degree in co-relation 33205. Up to 3241 conditions per place. [2024-06-03 19:39:27,780 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 187 selfloop transitions, 95 changer transitions 0/288 dead transitions. [2024-06-03 19:39:27,780 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 187 places, 288 transitions, 3556 flow [2024-06-03 19:39:27,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 19:39:27,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 19:39:27,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 195 transitions. [2024-06-03 19:39:27,782 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45348837209302323 [2024-06-03 19:39:27,782 INFO L175 Difference]: Start difference. First operand has 178 places, 244 transitions, 2497 flow. Second operand 10 states and 195 transitions. [2024-06-03 19:39:27,782 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 187 places, 288 transitions, 3556 flow [2024-06-03 19:39:27,978 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 179 places, 288 transitions, 3389 flow, removed 15 selfloop flow, removed 8 redundant places. [2024-06-03 19:39:27,981 INFO L231 Difference]: Finished difference. Result has 181 places, 247 transitions, 2711 flow [2024-06-03 19:39:27,981 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2330, PETRI_DIFFERENCE_MINUEND_PLACES=170, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=244, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=93, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=150, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2711, PETRI_PLACES=181, PETRI_TRANSITIONS=247} [2024-06-03 19:39:27,982 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 137 predicate places. [2024-06-03 19:39:27,982 INFO L495 AbstractCegarLoop]: Abstraction has has 181 places, 247 transitions, 2711 flow [2024-06-03 19:39:27,982 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:39:27,982 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:39:27,982 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:39:27,982 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-03 19:39:27,983 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)] === [2024-06-03 19:39:27,983 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:39:27,983 INFO L85 PathProgramCache]: Analyzing trace with hash 1190567277, now seen corresponding path program 3 times [2024-06-03 19:39:27,983 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:39:27,983 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [772530639] [2024-06-03 19:39:27,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:39:27,983 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:39:27,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:39:29,094 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:39:29,095 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:39:29,095 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [772530639] [2024-06-03 19:39:29,095 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [772530639] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:39:29,095 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:39:29,095 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-03 19:39:29,095 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1404350052] [2024-06-03 19:39:29,095 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:39:29,097 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-03 19:39:29,097 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:39:29,097 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-03 19:39:29,097 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-03 19:39:29,223 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-03 19:39:29,223 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 181 places, 247 transitions, 2711 flow. Second operand has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:39:29,223 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:39:29,223 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-03 19:39:29,223 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:39:30,184 INFO L124 PetriNetUnfolderBase]: 2608/4097 cut-off events. [2024-06-03 19:39:30,184 INFO L125 PetriNetUnfolderBase]: For 271739/271739 co-relation queries the response was YES. [2024-06-03 19:39:30,205 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32636 conditions, 4097 events. 2608/4097 cut-off events. For 271739/271739 co-relation queries the response was YES. Maximal size of possible extension queue 195. Compared 22290 event pairs, 578 based on Foata normal form. 16/4112 useless extension candidates. Maximal degree in co-relation 32557. Up to 3557 conditions per place. [2024-06-03 19:39:30,222 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 186 selfloop transitions, 91 changer transitions 0/283 dead transitions. [2024-06-03 19:39:30,223 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 190 places, 283 transitions, 3415 flow [2024-06-03 19:39:30,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 19:39:30,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 19:39:30,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 191 transitions. [2024-06-03 19:39:30,224 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4441860465116279 [2024-06-03 19:39:30,224 INFO L175 Difference]: Start difference. First operand has 181 places, 247 transitions, 2711 flow. Second operand 10 states and 191 transitions. [2024-06-03 19:39:30,224 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 190 places, 283 transitions, 3415 flow [2024-06-03 19:39:30,446 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 184 places, 283 transitions, 3264 flow, removed 19 selfloop flow, removed 6 redundant places. [2024-06-03 19:39:30,450 INFO L231 Difference]: Finished difference. Result has 185 places, 247 transitions, 2749 flow [2024-06-03 19:39:30,450 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2560, PETRI_DIFFERENCE_MINUEND_PLACES=175, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=247, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=91, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=156, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2749, PETRI_PLACES=185, PETRI_TRANSITIONS=247} [2024-06-03 19:39:30,450 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 141 predicate places. [2024-06-03 19:39:30,450 INFO L495 AbstractCegarLoop]: Abstraction has has 185 places, 247 transitions, 2749 flow [2024-06-03 19:39:30,450 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:39:30,451 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:39:30,451 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:39:30,451 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-03 19:39:30,451 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)] === [2024-06-03 19:39:30,451 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:39:30,451 INFO L85 PathProgramCache]: Analyzing trace with hash 832109887, now seen corresponding path program 4 times [2024-06-03 19:39:30,451 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:39:30,451 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1447689717] [2024-06-03 19:39:30,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:39:30,451 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:39:30,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:39:31,765 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:39:31,765 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:39:31,765 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1447689717] [2024-06-03 19:39:31,765 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1447689717] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:39:31,765 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:39:31,765 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-03 19:39:31,765 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1236110690] [2024-06-03 19:39:31,765 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:39:31,765 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-03 19:39:31,766 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:39:31,766 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-03 19:39:31,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-03 19:39:31,924 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-03 19:39:31,925 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 185 places, 247 transitions, 2749 flow. Second operand has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:39:31,925 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:39:31,925 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-03 19:39:31,925 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:39:32,854 INFO L124 PetriNetUnfolderBase]: 2659/4192 cut-off events. [2024-06-03 19:39:32,854 INFO L125 PetriNetUnfolderBase]: For 283074/283076 co-relation queries the response was YES. [2024-06-03 19:39:32,876 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33731 conditions, 4192 events. 2659/4192 cut-off events. For 283074/283076 co-relation queries the response was YES. Maximal size of possible extension queue 205. Compared 23229 event pairs, 629 based on Foata normal form. 18/4209 useless extension candidates. Maximal degree in co-relation 33650. Up to 3827 conditions per place. [2024-06-03 19:39:32,893 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 244 selfloop transitions, 34 changer transitions 0/284 dead transitions. [2024-06-03 19:39:32,893 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 194 places, 284 transitions, 3513 flow [2024-06-03 19:39:32,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 19:39:32,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 19:39:32,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 189 transitions. [2024-06-03 19:39:32,894 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43953488372093025 [2024-06-03 19:39:32,894 INFO L175 Difference]: Start difference. First operand has 185 places, 247 transitions, 2749 flow. Second operand 10 states and 189 transitions. [2024-06-03 19:39:32,894 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 194 places, 284 transitions, 3513 flow [2024-06-03 19:39:33,133 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 186 places, 284 transitions, 3302 flow, removed 16 selfloop flow, removed 8 redundant places. [2024-06-03 19:39:33,136 INFO L231 Difference]: Finished difference. Result has 187 places, 248 transitions, 2673 flow [2024-06-03 19:39:33,136 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2538, PETRI_DIFFERENCE_MINUEND_PLACES=177, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=247, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=213, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2673, PETRI_PLACES=187, PETRI_TRANSITIONS=248} [2024-06-03 19:39:33,136 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 143 predicate places. [2024-06-03 19:39:33,136 INFO L495 AbstractCegarLoop]: Abstraction has has 187 places, 248 transitions, 2673 flow [2024-06-03 19:39:33,137 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:39:33,137 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:39:33,137 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:39:33,137 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-03 19:39:33,137 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)] === [2024-06-03 19:39:33,137 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:39:33,137 INFO L85 PathProgramCache]: Analyzing trace with hash 1185003087, now seen corresponding path program 5 times [2024-06-03 19:39:33,137 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:39:33,137 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1704936631] [2024-06-03 19:39:33,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:39:33,138 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:39:33,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:39:34,537 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:39:34,537 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:39:34,538 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1704936631] [2024-06-03 19:39:34,538 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1704936631] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:39:34,538 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:39:34,538 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-03 19:39:34,538 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [984918076] [2024-06-03 19:39:34,538 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:39:34,538 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-03 19:39:34,538 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:39:34,538 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-03 19:39:34,538 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-03 19:39:34,679 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-03 19:39:34,679 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 187 places, 248 transitions, 2673 flow. Second operand has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:39:34,679 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:39:34,679 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-03 19:39:34,679 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:39:35,688 INFO L124 PetriNetUnfolderBase]: 2689/4246 cut-off events. [2024-06-03 19:39:35,688 INFO L125 PetriNetUnfolderBase]: For 290638/290640 co-relation queries the response was YES. [2024-06-03 19:39:35,709 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33181 conditions, 4246 events. 2689/4246 cut-off events. For 290638/290640 co-relation queries the response was YES. Maximal size of possible extension queue 209. Compared 23598 event pairs, 671 based on Foata normal form. 30/4275 useless extension candidates. Maximal degree in co-relation 33099. Up to 3794 conditions per place. [2024-06-03 19:39:35,726 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 245 selfloop transitions, 36 changer transitions 0/287 dead transitions. [2024-06-03 19:39:35,726 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 196 places, 287 transitions, 3453 flow [2024-06-03 19:39:35,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 19:39:35,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 19:39:35,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 190 transitions. [2024-06-03 19:39:35,728 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4418604651162791 [2024-06-03 19:39:35,728 INFO L175 Difference]: Start difference. First operand has 187 places, 248 transitions, 2673 flow. Second operand 10 states and 190 transitions. [2024-06-03 19:39:35,728 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 196 places, 287 transitions, 3453 flow [2024-06-03 19:39:36,018 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 188 places, 287 transitions, 3334 flow, removed 27 selfloop flow, removed 8 redundant places. [2024-06-03 19:39:36,022 INFO L231 Difference]: Finished difference. Result has 189 places, 250 transitions, 2704 flow [2024-06-03 19:39:36,022 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2554, PETRI_DIFFERENCE_MINUEND_PLACES=179, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=248, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=212, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2704, PETRI_PLACES=189, PETRI_TRANSITIONS=250} [2024-06-03 19:39:36,022 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 145 predicate places. [2024-06-03 19:39:36,022 INFO L495 AbstractCegarLoop]: Abstraction has has 189 places, 250 transitions, 2704 flow [2024-06-03 19:39:36,022 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:39:36,023 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:39:36,023 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:39:36,023 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-03 19:39:36,023 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:39:36,023 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:39:36,023 INFO L85 PathProgramCache]: Analyzing trace with hash 115397853, now seen corresponding path program 1 times [2024-06-03 19:39:36,023 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:39:36,023 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [393017718] [2024-06-03 19:39:36,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:39:36,024 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:39:36,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:39:36,727 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:39:36,728 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:39:36,728 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [393017718] [2024-06-03 19:39:36,728 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [393017718] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:39:36,728 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:39:36,728 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 19:39:36,728 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [425026423] [2024-06-03 19:39:36,728 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:39:36,728 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 19:39:36,728 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:39:36,729 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 19:39:36,729 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-03 19:39:36,820 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-03 19:39:36,820 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 189 places, 250 transitions, 2704 flow. Second operand has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:39:36,821 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:39:36,821 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-03 19:39:36,821 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:39:37,750 INFO L124 PetriNetUnfolderBase]: 2812/4369 cut-off events. [2024-06-03 19:39:37,750 INFO L125 PetriNetUnfolderBase]: For 273722/273722 co-relation queries the response was YES. [2024-06-03 19:39:37,772 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33875 conditions, 4369 events. 2812/4369 cut-off events. For 273722/273722 co-relation queries the response was YES. Maximal size of possible extension queue 210. Compared 23752 event pairs, 669 based on Foata normal form. 2/4370 useless extension candidates. Maximal degree in co-relation 33792. Up to 4156 conditions per place. [2024-06-03 19:39:37,789 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 224 selfloop transitions, 46 changer transitions 0/274 dead transitions. [2024-06-03 19:39:37,789 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 195 places, 274 transitions, 3502 flow [2024-06-03 19:39:37,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 19:39:37,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 19:39:37,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 129 transitions. [2024-06-03 19:39:37,790 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-03 19:39:37,790 INFO L175 Difference]: Start difference. First operand has 189 places, 250 transitions, 2704 flow. Second operand 7 states and 129 transitions. [2024-06-03 19:39:37,790 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 195 places, 274 transitions, 3502 flow [2024-06-03 19:39:37,958 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 187 places, 274 transitions, 3406 flow, removed 15 selfloop flow, removed 8 redundant places. [2024-06-03 19:39:37,961 INFO L231 Difference]: Finished difference. Result has 188 places, 256 transitions, 2792 flow [2024-06-03 19:39:37,961 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2608, PETRI_DIFFERENCE_MINUEND_PLACES=181, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=250, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=207, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2792, PETRI_PLACES=188, PETRI_TRANSITIONS=256} [2024-06-03 19:39:37,961 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 144 predicate places. [2024-06-03 19:39:37,962 INFO L495 AbstractCegarLoop]: Abstraction has has 188 places, 256 transitions, 2792 flow [2024-06-03 19:39:37,962 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:39:37,962 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:39:37,962 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:39:37,962 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-03 19:39:37,962 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)] === [2024-06-03 19:39:37,962 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:39:37,962 INFO L85 PathProgramCache]: Analyzing trace with hash 1214446987, now seen corresponding path program 6 times [2024-06-03 19:39:37,962 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:39:37,962 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1813128309] [2024-06-03 19:39:37,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:39:37,962 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:39:37,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:39:39,134 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:39:39,135 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:39:39,135 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1813128309] [2024-06-03 19:39:39,135 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1813128309] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:39:39,135 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:39:39,135 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-03 19:39:39,135 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [873138632] [2024-06-03 19:39:39,135 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:39:39,135 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-03 19:39:39,135 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:39:39,136 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-03 19:39:39,136 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-03 19:39:39,278 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-03 19:39:39,279 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 188 places, 256 transitions, 2792 flow. Second operand has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:39:39,279 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:39:39,279 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-03 19:39:39,279 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:39:40,297 INFO L124 PetriNetUnfolderBase]: 2922/4625 cut-off events. [2024-06-03 19:39:40,297 INFO L125 PetriNetUnfolderBase]: For 335333/335333 co-relation queries the response was YES. [2024-06-03 19:39:40,323 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38115 conditions, 4625 events. 2922/4625 cut-off events. For 335333/335333 co-relation queries the response was YES. Maximal size of possible extension queue 243. Compared 26334 event pairs, 685 based on Foata normal form. 12/4636 useless extension candidates. Maximal degree in co-relation 38031. Up to 3765 conditions per place. [2024-06-03 19:39:40,343 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 181 selfloop transitions, 109 changer transitions 0/298 dead transitions. [2024-06-03 19:39:40,343 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 197 places, 298 transitions, 3891 flow [2024-06-03 19:39:40,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 19:39:40,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 19:39:40,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 197 transitions. [2024-06-03 19:39:40,344 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45813953488372094 [2024-06-03 19:39:40,344 INFO L175 Difference]: Start difference. First operand has 188 places, 256 transitions, 2792 flow. Second operand 10 states and 197 transitions. [2024-06-03 19:39:40,344 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 197 places, 298 transitions, 3891 flow [2024-06-03 19:39:40,680 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 194 places, 298 transitions, 3834 flow, removed 17 selfloop flow, removed 3 redundant places. [2024-06-03 19:39:40,683 INFO L231 Difference]: Finished difference. Result has 196 places, 259 transitions, 3149 flow [2024-06-03 19:39:40,683 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2735, PETRI_DIFFERENCE_MINUEND_PLACES=185, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=256, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=107, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=148, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3149, PETRI_PLACES=196, PETRI_TRANSITIONS=259} [2024-06-03 19:39:40,684 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 152 predicate places. [2024-06-03 19:39:40,684 INFO L495 AbstractCegarLoop]: Abstraction has has 196 places, 259 transitions, 3149 flow [2024-06-03 19:39:40,684 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:39:40,684 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:39:40,684 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:39:40,684 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-03 19:39:40,685 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)] === [2024-06-03 19:39:40,685 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:39:40,685 INFO L85 PathProgramCache]: Analyzing trace with hash 1214439547, now seen corresponding path program 7 times [2024-06-03 19:39:40,685 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:39:40,685 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2050541621] [2024-06-03 19:39:40,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:39:40,685 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:39:40,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:39:41,843 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:39:41,843 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:39:41,843 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2050541621] [2024-06-03 19:39:41,843 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2050541621] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:39:41,843 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:39:41,843 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-03 19:39:41,843 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [604961499] [2024-06-03 19:39:41,843 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:39:41,843 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-03 19:39:41,844 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:39:41,844 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-03 19:39:41,844 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-03 19:39:41,996 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-03 19:39:41,996 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 196 places, 259 transitions, 3149 flow. Second operand has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:39:41,996 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:39:41,996 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-03 19:39:41,996 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:39:42,978 INFO L124 PetriNetUnfolderBase]: 2896/4581 cut-off events. [2024-06-03 19:39:42,978 INFO L125 PetriNetUnfolderBase]: For 340302/340302 co-relation queries the response was YES. [2024-06-03 19:39:43,002 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37790 conditions, 4581 events. 2896/4581 cut-off events. For 340302/340302 co-relation queries the response was YES. Maximal size of possible extension queue 239. Compared 25991 event pairs, 686 based on Foata normal form. 16/4596 useless extension candidates. Maximal degree in co-relation 37703. Up to 3982 conditions per place. [2024-06-03 19:39:43,020 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 179 selfloop transitions, 106 changer transitions 0/293 dead transitions. [2024-06-03 19:39:43,021 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 205 places, 293 transitions, 3865 flow [2024-06-03 19:39:43,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 19:39:43,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 19:39:43,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 193 transitions. [2024-06-03 19:39:43,022 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44883720930232557 [2024-06-03 19:39:43,022 INFO L175 Difference]: Start difference. First operand has 196 places, 259 transitions, 3149 flow. Second operand 10 states and 193 transitions. [2024-06-03 19:39:43,022 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 205 places, 293 transitions, 3865 flow [2024-06-03 19:39:43,380 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 199 places, 293 transitions, 3699 flow, removed 22 selfloop flow, removed 6 redundant places. [2024-06-03 19:39:43,383 INFO L231 Difference]: Finished difference. Result has 200 places, 259 transitions, 3202 flow [2024-06-03 19:39:43,384 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2983, PETRI_DIFFERENCE_MINUEND_PLACES=190, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=259, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=106, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=153, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3202, PETRI_PLACES=200, PETRI_TRANSITIONS=259} [2024-06-03 19:39:43,384 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 156 predicate places. [2024-06-03 19:39:43,384 INFO L495 AbstractCegarLoop]: Abstraction has has 200 places, 259 transitions, 3202 flow [2024-06-03 19:39:43,384 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:39:43,384 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:39:43,384 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:39:43,384 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-03 19:39:43,384 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)] === [2024-06-03 19:39:43,385 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:39:43,385 INFO L85 PathProgramCache]: Analyzing trace with hash -215656365, now seen corresponding path program 8 times [2024-06-03 19:39:43,385 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:39:43,385 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [120289755] [2024-06-03 19:39:43,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:39:43,385 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:39:43,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:39:44,629 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:39:44,629 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:39:44,629 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [120289755] [2024-06-03 19:39:44,629 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [120289755] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:39:44,629 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:39:44,629 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-03 19:39:44,629 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [10169364] [2024-06-03 19:39:44,629 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:39:44,630 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-03 19:39:44,630 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:39:44,630 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-03 19:39:44,630 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-03 19:39:44,833 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-03 19:39:44,833 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 200 places, 259 transitions, 3202 flow. Second operand has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:39:44,833 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:39:44,833 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-03 19:39:44,833 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:39:45,845 INFO L124 PetriNetUnfolderBase]: 2961/4690 cut-off events. [2024-06-03 19:39:45,845 INFO L125 PetriNetUnfolderBase]: For 357128/357132 co-relation queries the response was YES. [2024-06-03 19:39:45,870 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38990 conditions, 4690 events. 2961/4690 cut-off events. For 357128/357132 co-relation queries the response was YES. Maximal size of possible extension queue 249. Compared 26834 event pairs, 695 based on Foata normal form. 20/4709 useless extension candidates. Maximal degree in co-relation 38901. Up to 4238 conditions per place. [2024-06-03 19:39:45,887 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 233 selfloop transitions, 53 changer transitions 0/294 dead transitions. [2024-06-03 19:39:45,888 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 209 places, 294 transitions, 3980 flow [2024-06-03 19:39:45,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 19:39:45,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 19:39:45,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 191 transitions. [2024-06-03 19:39:45,889 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4441860465116279 [2024-06-03 19:39:45,889 INFO L175 Difference]: Start difference. First operand has 200 places, 259 transitions, 3202 flow. Second operand 10 states and 191 transitions. [2024-06-03 19:39:45,889 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 209 places, 294 transitions, 3980 flow [2024-06-03 19:39:46,250 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 201 places, 294 transitions, 3739 flow, removed 16 selfloop flow, removed 8 redundant places. [2024-06-03 19:39:46,253 INFO L231 Difference]: Finished difference. Result has 202 places, 260 transitions, 3136 flow [2024-06-03 19:39:46,254 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2961, PETRI_DIFFERENCE_MINUEND_PLACES=192, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=259, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=206, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3136, PETRI_PLACES=202, PETRI_TRANSITIONS=260} [2024-06-03 19:39:46,254 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 158 predicate places. [2024-06-03 19:39:46,254 INFO L495 AbstractCegarLoop]: Abstraction has has 202 places, 260 transitions, 3136 flow [2024-06-03 19:39:46,254 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:39:46,254 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:39:46,254 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:39:46,254 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-03 19:39:46,254 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)] === [2024-06-03 19:39:46,254 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:39:46,255 INFO L85 PathProgramCache]: Analyzing trace with hash -404691377, now seen corresponding path program 9 times [2024-06-03 19:39:46,255 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:39:46,255 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1318695584] [2024-06-03 19:39:46,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:39:46,255 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:39:46,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:39:47,670 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:39:47,670 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:39:47,670 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1318695584] [2024-06-03 19:39:47,670 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1318695584] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:39:47,670 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:39:47,670 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-03 19:39:47,670 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [144570426] [2024-06-03 19:39:47,670 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:39:47,670 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-03 19:39:47,670 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:39:47,671 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-03 19:39:47,671 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-06-03 19:39:47,802 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-03 19:39:47,803 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 202 places, 260 transitions, 3136 flow. Second operand has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:39:47,803 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:39:47,803 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-03 19:39:47,803 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:39:48,868 INFO L124 PetriNetUnfolderBase]: 2926/4639 cut-off events. [2024-06-03 19:39:48,868 INFO L125 PetriNetUnfolderBase]: For 346114/346118 co-relation queries the response was YES. [2024-06-03 19:39:48,894 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37708 conditions, 4639 events. 2926/4639 cut-off events. For 346114/346118 co-relation queries the response was YES. Maximal size of possible extension queue 246. Compared 26630 event pairs, 717 based on Foata normal form. 20/4658 useless extension candidates. Maximal degree in co-relation 37618. Up to 4187 conditions per place. [2024-06-03 19:39:48,912 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 232 selfloop transitions, 54 changer transitions 0/294 dead transitions. [2024-06-03 19:39:48,912 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 211 places, 294 transitions, 3854 flow [2024-06-03 19:39:48,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 19:39:48,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 19:39:48,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 190 transitions. [2024-06-03 19:39:48,913 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4418604651162791 [2024-06-03 19:39:48,914 INFO L175 Difference]: Start difference. First operand has 202 places, 260 transitions, 3136 flow. Second operand 10 states and 190 transitions. [2024-06-03 19:39:48,914 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 211 places, 294 transitions, 3854 flow [2024-06-03 19:39:49,256 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 203 places, 294 transitions, 3693 flow, removed 29 selfloop flow, removed 8 redundant places. [2024-06-03 19:39:49,260 INFO L231 Difference]: Finished difference. Result has 204 places, 260 transitions, 3090 flow [2024-06-03 19:39:49,260 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2975, PETRI_DIFFERENCE_MINUEND_PLACES=194, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=260, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=206, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3090, PETRI_PLACES=204, PETRI_TRANSITIONS=260} [2024-06-03 19:39:49,260 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 160 predicate places. [2024-06-03 19:39:49,260 INFO L495 AbstractCegarLoop]: Abstraction has has 204 places, 260 transitions, 3090 flow [2024-06-03 19:39:49,260 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:39:49,261 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:39:49,261 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:39:49,261 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-03 19:39:49,261 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)] === [2024-06-03 19:39:49,261 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:39:49,261 INFO L85 PathProgramCache]: Analyzing trace with hash -310761205, now seen corresponding path program 10 times [2024-06-03 19:39:49,261 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:39:49,261 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1423484285] [2024-06-03 19:39:49,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:39:49,262 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:39:49,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:39:50,515 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:39:50,515 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:39:50,515 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1423484285] [2024-06-03 19:39:50,515 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1423484285] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:39:50,515 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:39:50,515 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-03 19:39:50,516 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1490119317] [2024-06-03 19:39:50,516 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:39:50,516 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-03 19:39:50,516 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:39:50,516 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-03 19:39:50,516 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-03 19:39:50,704 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-03 19:39:50,704 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 204 places, 260 transitions, 3090 flow. Second operand has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:39:50,705 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:39:50,705 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-03 19:39:50,705 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:39:51,745 INFO L124 PetriNetUnfolderBase]: 2959/4698 cut-off events. [2024-06-03 19:39:51,745 INFO L125 PetriNetUnfolderBase]: For 349961/349965 co-relation queries the response was YES. [2024-06-03 19:39:51,769 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37798 conditions, 4698 events. 2959/4698 cut-off events. For 349961/349965 co-relation queries the response was YES. Maximal size of possible extension queue 249. Compared 27066 event pairs, 725 based on Foata normal form. 20/4717 useless extension candidates. Maximal degree in co-relation 37707. Up to 4246 conditions per place. [2024-06-03 19:39:51,786 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 232 selfloop transitions, 55 changer transitions 0/295 dead transitions. [2024-06-03 19:39:51,786 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 213 places, 295 transitions, 3871 flow [2024-06-03 19:39:51,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 19:39:51,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 19:39:51,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 189 transitions. [2024-06-03 19:39:51,787 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43953488372093025 [2024-06-03 19:39:51,787 INFO L175 Difference]: Start difference. First operand has 204 places, 260 transitions, 3090 flow. Second operand 10 states and 189 transitions. [2024-06-03 19:39:51,787 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 213 places, 295 transitions, 3871 flow [2024-06-03 19:39:52,123 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 204 places, 295 transitions, 3750 flow, removed 2 selfloop flow, removed 9 redundant places. [2024-06-03 19:39:52,127 INFO L231 Difference]: Finished difference. Result has 205 places, 261 transitions, 3149 flow [2024-06-03 19:39:52,127 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=2969, PETRI_DIFFERENCE_MINUEND_PLACES=195, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=260, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=205, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3149, PETRI_PLACES=205, PETRI_TRANSITIONS=261} [2024-06-03 19:39:52,127 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 161 predicate places. [2024-06-03 19:39:52,128 INFO L495 AbstractCegarLoop]: Abstraction has has 205 places, 261 transitions, 3149 flow [2024-06-03 19:39:52,128 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:39:52,128 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:39:52,128 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:39:52,128 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-03 19:39:52,128 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)] === [2024-06-03 19:39:52,128 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:39:52,129 INFO L85 PathProgramCache]: Analyzing trace with hash -54058885, now seen corresponding path program 11 times [2024-06-03 19:39:52,129 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:39:52,129 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [586095214] [2024-06-03 19:39:52,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:39:52,129 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:39:52,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:39:53,298 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:39:53,298 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:39:53,298 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [586095214] [2024-06-03 19:39:53,298 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [586095214] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:39:53,298 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:39:53,298 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-03 19:39:53,298 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [229540686] [2024-06-03 19:39:53,298 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:39:53,298 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-03 19:39:53,298 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:39:53,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-03 19:39:53,299 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-06-03 19:39:53,474 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-03 19:39:53,474 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 205 places, 261 transitions, 3149 flow. Second operand has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:39:53,474 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:39:53,474 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-03 19:39:53,474 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:39:54,499 INFO L124 PetriNetUnfolderBase]: 3028/4813 cut-off events. [2024-06-03 19:39:54,499 INFO L125 PetriNetUnfolderBase]: For 368168/368168 co-relation queries the response was YES. [2024-06-03 19:39:54,527 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38934 conditions, 4813 events. 3028/4813 cut-off events. For 368168/368168 co-relation queries the response was YES. Maximal size of possible extension queue 260. Compared 27851 event pairs, 698 based on Foata normal form. 16/4828 useless extension candidates. Maximal degree in co-relation 38842. Up to 4091 conditions per place. [2024-06-03 19:39:54,547 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 153 selfloop transitions, 138 changer transitions 0/299 dead transitions. [2024-06-03 19:39:54,547 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 214 places, 299 transitions, 3952 flow [2024-06-03 19:39:54,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 19:39:54,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 19:39:54,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 192 transitions. [2024-06-03 19:39:54,548 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44651162790697674 [2024-06-03 19:39:54,548 INFO L175 Difference]: Start difference. First operand has 205 places, 261 transitions, 3149 flow. Second operand 10 states and 192 transitions. [2024-06-03 19:39:54,548 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 214 places, 299 transitions, 3952 flow [2024-06-03 19:39:54,946 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 206 places, 299 transitions, 3811 flow, removed 17 selfloop flow, removed 8 redundant places. [2024-06-03 19:39:54,949 INFO L231 Difference]: Finished difference. Result has 207 places, 265 transitions, 3368 flow [2024-06-03 19:39:54,949 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3008, PETRI_DIFFERENCE_MINUEND_PLACES=197, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=261, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=134, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=126, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3368, PETRI_PLACES=207, PETRI_TRANSITIONS=265} [2024-06-03 19:39:54,950 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 163 predicate places. [2024-06-03 19:39:54,950 INFO L495 AbstractCegarLoop]: Abstraction has has 207 places, 265 transitions, 3368 flow [2024-06-03 19:39:54,950 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:39:54,950 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:39:54,950 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:39:54,950 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-03 19:39:54,950 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)] === [2024-06-03 19:39:54,950 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:39:54,950 INFO L85 PathProgramCache]: Analyzing trace with hash -310559395, now seen corresponding path program 12 times [2024-06-03 19:39:54,950 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:39:54,950 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [244111008] [2024-06-03 19:39:54,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:39:54,951 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:39:54,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:39:56,122 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:39:56,122 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:39:56,122 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [244111008] [2024-06-03 19:39:56,122 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [244111008] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:39:56,122 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:39:56,122 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-03 19:39:56,122 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1425803265] [2024-06-03 19:39:56,122 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:39:56,122 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-03 19:39:56,122 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:39:56,123 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-03 19:39:56,123 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-03 19:39:56,252 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-03 19:39:56,252 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 207 places, 265 transitions, 3368 flow. Second operand has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:39:56,252 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:39:56,252 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-03 19:39:56,252 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:39:57,222 INFO L124 PetriNetUnfolderBase]: 3086/4921 cut-off events. [2024-06-03 19:39:57,222 INFO L125 PetriNetUnfolderBase]: For 383395/383395 co-relation queries the response was YES. [2024-06-03 19:39:57,251 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40142 conditions, 4921 events. 3086/4921 cut-off events. For 383395/383395 co-relation queries the response was YES. Maximal size of possible extension queue 271. Compared 28760 event pairs, 670 based on Foata normal form. 16/4936 useless extension candidates. Maximal degree in co-relation 40049. Up to 4316 conditions per place. [2024-06-03 19:39:57,271 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 186 selfloop transitions, 106 changer transitions 0/300 dead transitions. [2024-06-03 19:39:57,271 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 216 places, 300 transitions, 4160 flow [2024-06-03 19:39:57,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 19:39:57,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 19:39:57,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 192 transitions. [2024-06-03 19:39:57,272 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44651162790697674 [2024-06-03 19:39:57,272 INFO L175 Difference]: Start difference. First operand has 207 places, 265 transitions, 3368 flow. Second operand 10 states and 192 transitions. [2024-06-03 19:39:57,272 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 216 places, 300 transitions, 4160 flow [2024-06-03 19:39:57,780 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 210 places, 300 transitions, 3906 flow, removed 18 selfloop flow, removed 6 redundant places. [2024-06-03 19:39:57,784 INFO L231 Difference]: Finished difference. Result has 211 places, 266 transitions, 3397 flow [2024-06-03 19:39:57,784 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3114, PETRI_DIFFERENCE_MINUEND_PLACES=201, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=265, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=105, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=159, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3397, PETRI_PLACES=211, PETRI_TRANSITIONS=266} [2024-06-03 19:39:57,784 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 167 predicate places. [2024-06-03 19:39:57,785 INFO L495 AbstractCegarLoop]: Abstraction has has 211 places, 266 transitions, 3397 flow [2024-06-03 19:39:57,785 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:39:57,785 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:39:57,785 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:39:57,785 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-03 19:39:57,785 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)] === [2024-06-03 19:39:57,785 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:39:57,786 INFO L85 PathProgramCache]: Analyzing trace with hash -54051445, now seen corresponding path program 13 times [2024-06-03 19:39:57,786 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:39:57,786 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1584882640] [2024-06-03 19:39:57,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:39:57,786 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:39:57,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:39:59,182 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:39:59,182 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:39:59,182 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1584882640] [2024-06-03 19:39:59,183 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1584882640] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:39:59,183 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:39:59,183 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-03 19:39:59,183 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [999848822] [2024-06-03 19:39:59,183 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:39:59,183 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-03 19:39:59,183 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:39:59,183 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-03 19:39:59,183 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-03 19:39:59,322 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-03 19:39:59,322 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 211 places, 266 transitions, 3397 flow. Second operand has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:39:59,322 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:39:59,322 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-03 19:39:59,323 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:40:00,456 INFO L124 PetriNetUnfolderBase]: 3205/5136 cut-off events. [2024-06-03 19:40:00,457 INFO L125 PetriNetUnfolderBase]: For 411014/411018 co-relation queries the response was YES. [2024-06-03 19:40:00,489 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42295 conditions, 5136 events. 3205/5136 cut-off events. For 411014/411018 co-relation queries the response was YES. Maximal size of possible extension queue 287. Compared 30484 event pairs, 779 based on Foata normal form. 16/5151 useless extension candidates. Maximal degree in co-relation 42201. Up to 4130 conditions per place. [2024-06-03 19:40:00,511 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 207 selfloop transitions, 98 changer transitions 0/313 dead transitions. [2024-06-03 19:40:00,511 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 221 places, 313 transitions, 4531 flow [2024-06-03 19:40:00,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-03 19:40:00,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-03 19:40:00,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 215 transitions. [2024-06-03 19:40:00,512 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45454545454545453 [2024-06-03 19:40:00,512 INFO L175 Difference]: Start difference. First operand has 211 places, 266 transitions, 3397 flow. Second operand 11 states and 215 transitions. [2024-06-03 19:40:00,512 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 221 places, 313 transitions, 4531 flow [2024-06-03 19:40:00,989 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 212 places, 313 transitions, 4229 flow, removed 19 selfloop flow, removed 9 redundant places. [2024-06-03 19:40:00,993 INFO L231 Difference]: Finished difference. Result has 214 places, 269 transitions, 3456 flow [2024-06-03 19:40:00,993 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3095, PETRI_DIFFERENCE_MINUEND_PLACES=202, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=266, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=95, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=168, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3456, PETRI_PLACES=214, PETRI_TRANSITIONS=269} [2024-06-03 19:40:00,993 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 170 predicate places. [2024-06-03 19:40:00,993 INFO L495 AbstractCegarLoop]: Abstraction has has 214 places, 269 transitions, 3456 flow [2024-06-03 19:40:00,994 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:40:00,994 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:40:00,994 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:40:00,994 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-06-03 19:40:00,994 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:40:00,994 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:40:00,994 INFO L85 PathProgramCache]: Analyzing trace with hash -44854675, now seen corresponding path program 14 times [2024-06-03 19:40:00,994 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:40:00,994 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [51242443] [2024-06-03 19:40:00,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:40:00,994 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:40:01,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:40:02,262 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:40:02,262 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:40:02,262 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [51242443] [2024-06-03 19:40:02,262 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [51242443] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:40:02,262 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:40:02,262 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-03 19:40:02,262 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [971163936] [2024-06-03 19:40:02,262 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:40:02,262 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-03 19:40:02,262 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:40:02,263 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-03 19:40:02,263 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-06-03 19:40:02,416 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-03 19:40:02,416 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 214 places, 269 transitions, 3456 flow. Second operand has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:40:02,416 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:40:02,416 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-03 19:40:02,416 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:40:03,510 INFO L124 PetriNetUnfolderBase]: 3221/5168 cut-off events. [2024-06-03 19:40:03,510 INFO L125 PetriNetUnfolderBase]: For 417868/417872 co-relation queries the response was YES. [2024-06-03 19:40:03,543 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42397 conditions, 5168 events. 3221/5168 cut-off events. For 417868/417872 co-relation queries the response was YES. Maximal size of possible extension queue 288. Compared 30703 event pairs, 744 based on Foata normal form. 16/5183 useless extension candidates. Maximal degree in co-relation 42301. Up to 3439 conditions per place. [2024-06-03 19:40:03,565 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 193 selfloop transitions, 107 changer transitions 0/308 dead transitions. [2024-06-03 19:40:03,565 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 223 places, 308 transitions, 4296 flow [2024-06-03 19:40:03,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 19:40:03,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 19:40:03,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 194 transitions. [2024-06-03 19:40:03,566 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4511627906976744 [2024-06-03 19:40:03,566 INFO L175 Difference]: Start difference. First operand has 214 places, 269 transitions, 3456 flow. Second operand 10 states and 194 transitions. [2024-06-03 19:40:03,567 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 223 places, 308 transitions, 4296 flow [2024-06-03 19:40:04,126 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 215 places, 308 transitions, 4071 flow, removed 25 selfloop flow, removed 8 redundant places. [2024-06-03 19:40:04,212 INFO L231 Difference]: Finished difference. Result has 216 places, 270 transitions, 3519 flow [2024-06-03 19:40:04,212 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3231, PETRI_DIFFERENCE_MINUEND_PLACES=206, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=269, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=106, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=162, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3519, PETRI_PLACES=216, PETRI_TRANSITIONS=270} [2024-06-03 19:40:04,213 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 172 predicate places. [2024-06-03 19:40:04,213 INFO L495 AbstractCegarLoop]: Abstraction has has 216 places, 270 transitions, 3519 flow [2024-06-03 19:40:04,213 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:40:04,213 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:40:04,213 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:40:04,213 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-06-03 19:40:04,213 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:40:04,214 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:40:04,214 INFO L85 PathProgramCache]: Analyzing trace with hash 1067566263, now seen corresponding path program 2 times [2024-06-03 19:40:04,214 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:40:04,214 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [318203461] [2024-06-03 19:40:04,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:40:04,214 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:40:04,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:40:04,941 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:40:04,941 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:40:04,941 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [318203461] [2024-06-03 19:40:04,941 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [318203461] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:40:04,941 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:40:04,941 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 19:40:04,941 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1250577415] [2024-06-03 19:40:04,941 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:40:04,941 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 19:40:04,941 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:40:04,942 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 19:40:04,942 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-03 19:40:04,997 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-03 19:40:04,997 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 216 places, 270 transitions, 3519 flow. Second operand has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:40:04,997 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:40:04,997 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-03 19:40:04,997 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:40:06,134 INFO L124 PetriNetUnfolderBase]: 3332/5281 cut-off events. [2024-06-03 19:40:06,134 INFO L125 PetriNetUnfolderBase]: For 415245/415245 co-relation queries the response was YES. [2024-06-03 19:40:06,162 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43224 conditions, 5281 events. 3332/5281 cut-off events. For 415245/415245 co-relation queries the response was YES. Maximal size of possible extension queue 289. Compared 30927 event pairs, 800 based on Foata normal form. 2/5282 useless extension candidates. Maximal degree in co-relation 43127. Up to 5035 conditions per place. [2024-06-03 19:40:06,183 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 234 selfloop transitions, 48 changer transitions 0/286 dead transitions. [2024-06-03 19:40:06,183 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 222 places, 286 transitions, 4309 flow [2024-06-03 19:40:06,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 19:40:06,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 19:40:06,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 124 transitions. [2024-06-03 19:40:06,184 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4119601328903654 [2024-06-03 19:40:06,184 INFO L175 Difference]: Start difference. First operand has 216 places, 270 transitions, 3519 flow. Second operand 7 states and 124 transitions. [2024-06-03 19:40:06,184 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 222 places, 286 transitions, 4309 flow [2024-06-03 19:40:06,622 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 215 places, 286 transitions, 4090 flow, removed 24 selfloop flow, removed 7 redundant places. [2024-06-03 19:40:06,626 INFO L231 Difference]: Finished difference. Result has 216 places, 273 transitions, 3448 flow [2024-06-03 19:40:06,626 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3300, PETRI_DIFFERENCE_MINUEND_PLACES=209, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=270, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=225, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3448, PETRI_PLACES=216, PETRI_TRANSITIONS=273} [2024-06-03 19:40:06,626 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 172 predicate places. [2024-06-03 19:40:06,626 INFO L495 AbstractCegarLoop]: Abstraction has has 216 places, 273 transitions, 3448 flow [2024-06-03 19:40:06,627 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:40:06,627 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:40:06,627 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:40:06,627 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-06-03 19:40:06,627 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:40:06,627 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:40:06,627 INFO L85 PathProgramCache]: Analyzing trace with hash 1067578353, now seen corresponding path program 3 times [2024-06-03 19:40:06,628 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:40:06,628 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1286524289] [2024-06-03 19:40:06,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:40:06,628 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:40:06,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:40:07,330 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:40:07,331 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:40:07,331 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1286524289] [2024-06-03 19:40:07,331 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1286524289] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:40:07,331 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:40:07,331 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 19:40:07,331 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1399088002] [2024-06-03 19:40:07,331 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:40:07,331 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 19:40:07,331 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:40:07,332 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 19:40:07,332 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-03 19:40:07,414 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-03 19:40:07,414 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 216 places, 273 transitions, 3448 flow. Second operand has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:40:07,414 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:40:07,414 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-03 19:40:07,414 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:40:08,517 INFO L124 PetriNetUnfolderBase]: 3326/5273 cut-off events. [2024-06-03 19:40:08,517 INFO L125 PetriNetUnfolderBase]: For 419013/419013 co-relation queries the response was YES. [2024-06-03 19:40:08,546 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42720 conditions, 5273 events. 3326/5273 cut-off events. For 419013/419013 co-relation queries the response was YES. Maximal size of possible extension queue 288. Compared 30888 event pairs, 799 based on Foata normal form. 2/5274 useless extension candidates. Maximal degree in co-relation 42622. Up to 5030 conditions per place. [2024-06-03 19:40:08,565 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 232 selfloop transitions, 49 changer transitions 0/285 dead transitions. [2024-06-03 19:40:08,565 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 222 places, 285 transitions, 4078 flow [2024-06-03 19:40:08,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 19:40:08,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 19:40:08,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 122 transitions. [2024-06-03 19:40:08,566 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4053156146179402 [2024-06-03 19:40:08,566 INFO L175 Difference]: Start difference. First operand has 216 places, 273 transitions, 3448 flow. Second operand 7 states and 122 transitions. [2024-06-03 19:40:08,566 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 222 places, 285 transitions, 4078 flow [2024-06-03 19:40:09,058 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 217 places, 285 transitions, 3893 flow, removed 32 selfloop flow, removed 5 redundant places. [2024-06-03 19:40:09,061 INFO L231 Difference]: Finished difference. Result has 218 places, 273 transitions, 3367 flow [2024-06-03 19:40:09,061 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3263, PETRI_DIFFERENCE_MINUEND_PLACES=211, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=273, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=224, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3367, PETRI_PLACES=218, PETRI_TRANSITIONS=273} [2024-06-03 19:40:09,061 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 174 predicate places. [2024-06-03 19:40:09,061 INFO L495 AbstractCegarLoop]: Abstraction has has 218 places, 273 transitions, 3367 flow [2024-06-03 19:40:09,061 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.875) internal successors, (87), 8 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:40:09,062 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:40:09,062 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:40:09,062 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-06-03 19:40:09,062 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:40:09,062 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:40:09,062 INFO L85 PathProgramCache]: Analyzing trace with hash -187029377, now seen corresponding path program 1 times [2024-06-03 19:40:09,062 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:40:09,062 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1468817023] [2024-06-03 19:40:09,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:40:09,062 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:40:09,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:40:09,814 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:40:09,815 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:40:09,815 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1468817023] [2024-06-03 19:40:09,815 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1468817023] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:40:09,815 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:40:09,815 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 19:40:09,815 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1594531024] [2024-06-03 19:40:09,815 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:40:09,815 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 19:40:09,815 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:40:09,815 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 19:40:09,816 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-03 19:40:09,919 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-03 19:40:09,919 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 218 places, 273 transitions, 3367 flow. Second operand has 8 states, 8 states have (on average 12.875) internal successors, (103), 8 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) [2024-06-03 19:40:09,919 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:40:09,920 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-03 19:40:09,920 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:40:10,816 INFO L124 PetriNetUnfolderBase]: 3024/4950 cut-off events. [2024-06-03 19:40:10,817 INFO L125 PetriNetUnfolderBase]: For 379102/379102 co-relation queries the response was YES. [2024-06-03 19:40:10,847 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39314 conditions, 4950 events. 3024/4950 cut-off events. For 379102/379102 co-relation queries the response was YES. Maximal size of possible extension queue 285. Compared 30174 event pairs, 763 based on Foata normal form. 1/4950 useless extension candidates. Maximal degree in co-relation 39215. Up to 4645 conditions per place. [2024-06-03 19:40:10,866 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 266 selfloop transitions, 15 changer transitions 0/291 dead transitions. [2024-06-03 19:40:10,866 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 224 places, 291 transitions, 4027 flow [2024-06-03 19:40:10,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 19:40:10,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 19:40:10,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 133 transitions. [2024-06-03 19:40:10,867 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4418604651162791 [2024-06-03 19:40:10,867 INFO L175 Difference]: Start difference. First operand has 218 places, 273 transitions, 3367 flow. Second operand 7 states and 133 transitions. [2024-06-03 19:40:10,867 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 224 places, 291 transitions, 4027 flow [2024-06-03 19:40:11,297 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 218 places, 291 transitions, 3921 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-06-03 19:40:11,300 INFO L231 Difference]: Finished difference. Result has 219 places, 276 transitions, 3351 flow [2024-06-03 19:40:11,300 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3261, PETRI_DIFFERENCE_MINUEND_PLACES=212, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=273, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=258, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3351, PETRI_PLACES=219, PETRI_TRANSITIONS=276} [2024-06-03 19:40:11,300 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 175 predicate places. [2024-06-03 19:40:11,301 INFO L495 AbstractCegarLoop]: Abstraction has has 219 places, 276 transitions, 3351 flow [2024-06-03 19:40:11,301 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.875) internal successors, (103), 8 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) [2024-06-03 19:40:11,301 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:40:11,301 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:40:11,301 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-06-03 19:40:11,301 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:40:11,301 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:40:11,301 INFO L85 PathProgramCache]: Analyzing trace with hash -186909221, now seen corresponding path program 1 times [2024-06-03 19:40:11,301 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:40:11,301 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [401977497] [2024-06-03 19:40:11,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:40:11,302 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:40:11,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:40:12,070 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:40:12,071 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:40:12,071 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [401977497] [2024-06-03 19:40:12,071 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [401977497] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:40:12,071 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:40:12,071 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 19:40:12,071 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1039406302] [2024-06-03 19:40:12,071 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:40:12,071 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 19:40:12,071 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:40:12,071 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 19:40:12,071 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-03 19:40:12,157 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-03 19:40:12,157 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 219 places, 276 transitions, 3351 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) [2024-06-03 19:40:12,157 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:40:12,157 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-03 19:40:12,157 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:40:12,975 INFO L124 PetriNetUnfolderBase]: 3132/5060 cut-off events. [2024-06-03 19:40:12,975 INFO L125 PetriNetUnfolderBase]: For 388631/388631 co-relation queries the response was YES. [2024-06-03 19:40:13,007 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40302 conditions, 5060 events. 3132/5060 cut-off events. For 388631/388631 co-relation queries the response was YES. Maximal size of possible extension queue 285. Compared 30341 event pairs, 801 based on Foata normal form. 1/5060 useless extension candidates. Maximal degree in co-relation 40202. Up to 4839 conditions per place. [2024-06-03 19:40:13,028 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 266 selfloop transitions, 24 changer transitions 0/295 dead transitions. [2024-06-03 19:40:13,028 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 225 places, 295 transitions, 4159 flow [2024-06-03 19:40:13,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 19:40:13,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 19:40:13,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 129 transitions. [2024-06-03 19:40:13,029 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-03 19:40:13,029 INFO L175 Difference]: Start difference. First operand has 219 places, 276 transitions, 3351 flow. Second operand 7 states and 129 transitions. [2024-06-03 19:40:13,029 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 225 places, 295 transitions, 4159 flow [2024-06-03 19:40:13,537 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 220 places, 295 transitions, 4091 flow, removed 21 selfloop flow, removed 5 redundant places. [2024-06-03 19:40:13,540 INFO L231 Difference]: Finished difference. Result has 221 places, 282 transitions, 3415 flow [2024-06-03 19:40:13,541 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3283, PETRI_DIFFERENCE_MINUEND_PLACES=214, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=276, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=255, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3415, PETRI_PLACES=221, PETRI_TRANSITIONS=282} [2024-06-03 19:40:13,541 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 177 predicate places. [2024-06-03 19:40:13,541 INFO L495 AbstractCegarLoop]: Abstraction has has 221 places, 282 transitions, 3415 flow [2024-06-03 19:40:13,541 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) [2024-06-03 19:40:13,541 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:40:13,541 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:40:13,541 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2024-06-03 19:40:13,541 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:40:13,541 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:40:13,541 INFO L85 PathProgramCache]: Analyzing trace with hash -186909407, now seen corresponding path program 2 times [2024-06-03 19:40:13,542 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:40:13,542 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1527375507] [2024-06-03 19:40:13,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:40:13,542 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:40:13,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:40:14,275 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:40:14,276 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:40:14,276 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1527375507] [2024-06-03 19:40:14,276 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1527375507] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:40:14,276 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:40:14,276 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 19:40:14,276 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1617216307] [2024-06-03 19:40:14,276 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:40:14,276 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 19:40:14,276 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:40:14,276 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 19:40:14,277 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-03 19:40:14,374 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-03 19:40:14,375 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 221 places, 282 transitions, 3415 flow. Second operand has 8 states, 8 states have (on average 12.875) internal successors, (103), 8 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) [2024-06-03 19:40:14,375 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:40:14,375 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-03 19:40:14,375 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:40:15,227 INFO L124 PetriNetUnfolderBase]: 3044/4974 cut-off events. [2024-06-03 19:40:15,227 INFO L125 PetriNetUnfolderBase]: For 401804/401804 co-relation queries the response was YES. [2024-06-03 19:40:15,260 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40316 conditions, 4974 events. 3044/4974 cut-off events. For 401804/401804 co-relation queries the response was YES. Maximal size of possible extension queue 285. Compared 30249 event pairs, 767 based on Foata normal form. 1/4974 useless extension candidates. Maximal degree in co-relation 40215. Up to 4651 conditions per place. [2024-06-03 19:40:15,281 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 262 selfloop transitions, 27 changer transitions 0/301 dead transitions. [2024-06-03 19:40:15,281 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 227 places, 301 transitions, 4263 flow [2024-06-03 19:40:15,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 19:40:15,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 19:40:15,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 135 transitions. [2024-06-03 19:40:15,282 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4485049833887043 [2024-06-03 19:40:15,282 INFO L175 Difference]: Start difference. First operand has 221 places, 282 transitions, 3415 flow. Second operand 7 states and 135 transitions. [2024-06-03 19:40:15,282 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 227 places, 301 transitions, 4263 flow [2024-06-03 19:40:15,784 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 224 places, 301 transitions, 4212 flow, removed 18 selfloop flow, removed 3 redundant places. [2024-06-03 19:40:15,788 INFO L231 Difference]: Finished difference. Result has 225 places, 288 transitions, 3542 flow [2024-06-03 19:40:15,788 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3364, PETRI_DIFFERENCE_MINUEND_PLACES=218, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=282, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=258, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3542, PETRI_PLACES=225, PETRI_TRANSITIONS=288} [2024-06-03 19:40:15,788 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 181 predicate places. [2024-06-03 19:40:15,788 INFO L495 AbstractCegarLoop]: Abstraction has has 225 places, 288 transitions, 3542 flow [2024-06-03 19:40:15,788 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.875) internal successors, (103), 8 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) [2024-06-03 19:40:15,788 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:40:15,789 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:40:15,789 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2024-06-03 19:40:15,789 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:40:15,789 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:40:15,789 INFO L85 PathProgramCache]: Analyzing trace with hash 121913247, now seen corresponding path program 2 times [2024-06-03 19:40:15,789 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:40:15,789 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [430443153] [2024-06-03 19:40:15,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:40:15,789 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:40:15,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:40:16,461 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:40:16,461 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:40:16,461 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [430443153] [2024-06-03 19:40:16,462 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [430443153] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:40:16,462 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:40:16,462 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 19:40:16,462 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [813759566] [2024-06-03 19:40:16,462 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:40:16,462 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 19:40:16,462 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:40:16,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 19:40:16,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-03 19:40:16,562 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-03 19:40:16,563 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 225 places, 288 transitions, 3542 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) [2024-06-03 19:40:16,563 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:40:16,563 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-03 19:40:16,563 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:40:17,511 INFO L124 PetriNetUnfolderBase]: 3142/5074 cut-off events. [2024-06-03 19:40:17,511 INFO L125 PetriNetUnfolderBase]: For 413865/413865 co-relation queries the response was YES. [2024-06-03 19:40:17,546 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41385 conditions, 5074 events. 3142/5074 cut-off events. For 413865/413865 co-relation queries the response was YES. Maximal size of possible extension queue 285. Compared 30375 event pairs, 799 based on Foata normal form. 1/5074 useless extension candidates. Maximal degree in co-relation 41282. Up to 4874 conditions per place. [2024-06-03 19:40:17,568 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 280 selfloop transitions, 15 changer transitions 0/300 dead transitions. [2024-06-03 19:40:17,568 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 231 places, 300 transitions, 4194 flow [2024-06-03 19:40:17,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 19:40:17,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 19:40:17,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 121 transitions. [2024-06-03 19:40:17,569 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4019933554817276 [2024-06-03 19:40:17,569 INFO L175 Difference]: Start difference. First operand has 225 places, 288 transitions, 3542 flow. Second operand 7 states and 121 transitions. [2024-06-03 19:40:17,569 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 231 places, 300 transitions, 4194 flow [2024-06-03 19:40:18,163 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 228 places, 300 transitions, 4125 flow, removed 26 selfloop flow, removed 3 redundant places. [2024-06-03 19:40:18,167 INFO L231 Difference]: Finished difference. Result has 229 places, 291 transitions, 3551 flow [2024-06-03 19:40:18,167 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3473, PETRI_DIFFERENCE_MINUEND_PLACES=222, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=288, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=273, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3551, PETRI_PLACES=229, PETRI_TRANSITIONS=291} [2024-06-03 19:40:18,167 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 185 predicate places. [2024-06-03 19:40:18,168 INFO L495 AbstractCegarLoop]: Abstraction has has 229 places, 291 transitions, 3551 flow [2024-06-03 19:40:18,168 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) [2024-06-03 19:40:18,168 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:40:18,168 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:40:18,168 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2024-06-03 19:40:18,168 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:40:18,168 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:40:18,168 INFO L85 PathProgramCache]: Analyzing trace with hash 784602157, now seen corresponding path program 3 times [2024-06-03 19:40:18,168 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:40:18,168 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1282615560] [2024-06-03 19:40:18,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:40:18,169 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:40:18,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:40:18,883 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:40:18,884 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:40:18,884 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1282615560] [2024-06-03 19:40:18,884 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1282615560] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:40:18,884 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:40:18,884 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 19:40:18,884 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1050598123] [2024-06-03 19:40:18,884 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:40:18,884 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 19:40:18,884 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:40:18,884 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 19:40:18,884 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-03 19:40:18,972 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-03 19:40:18,972 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 229 places, 291 transitions, 3551 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) [2024-06-03 19:40:18,972 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:40:18,972 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-03 19:40:18,972 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:40:19,899 INFO L124 PetriNetUnfolderBase]: 3139/5070 cut-off events. [2024-06-03 19:40:19,899 INFO L125 PetriNetUnfolderBase]: For 423088/423088 co-relation queries the response was YES. [2024-06-03 19:40:19,935 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41480 conditions, 5070 events. 3139/5070 cut-off events. For 423088/423088 co-relation queries the response was YES. Maximal size of possible extension queue 285. Compared 30334 event pairs, 799 based on Foata normal form. 1/5070 useless extension candidates. Maximal degree in co-relation 41375. Up to 4864 conditions per place. [2024-06-03 19:40:19,957 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 275 selfloop transitions, 20 changer transitions 0/300 dead transitions. [2024-06-03 19:40:19,957 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 235 places, 300 transitions, 4167 flow [2024-06-03 19:40:19,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 19:40:19,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 19:40:19,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 123 transitions. [2024-06-03 19:40:19,957 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40863787375415284 [2024-06-03 19:40:19,958 INFO L175 Difference]: Start difference. First operand has 229 places, 291 transitions, 3551 flow. Second operand 7 states and 123 transitions. [2024-06-03 19:40:19,958 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 235 places, 300 transitions, 4167 flow [2024-06-03 19:40:20,497 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 230 places, 300 transitions, 4101 flow, removed 20 selfloop flow, removed 5 redundant places. [2024-06-03 19:40:20,500 INFO L231 Difference]: Finished difference. Result has 231 places, 291 transitions, 3531 flow [2024-06-03 19:40:20,500 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3485, PETRI_DIFFERENCE_MINUEND_PLACES=224, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=291, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=271, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3531, PETRI_PLACES=231, PETRI_TRANSITIONS=291} [2024-06-03 19:40:20,501 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 187 predicate places. [2024-06-03 19:40:20,501 INFO L495 AbstractCegarLoop]: Abstraction has has 231 places, 291 transitions, 3531 flow [2024-06-03 19:40:20,501 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) [2024-06-03 19:40:20,501 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:40:20,501 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:40:20,501 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2024-06-03 19:40:20,501 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:40:20,501 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:40:20,501 INFO L85 PathProgramCache]: Analyzing trace with hash -872814939, now seen corresponding path program 3 times [2024-06-03 19:40:20,501 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:40:20,501 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1296111298] [2024-06-03 19:40:20,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:40:20,501 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:40:20,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:40:21,245 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:40:21,245 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:40:21,245 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1296111298] [2024-06-03 19:40:21,245 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1296111298] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:40:21,245 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:40:21,245 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 19:40:21,245 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [115650981] [2024-06-03 19:40:21,245 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:40:21,245 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 19:40:21,245 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:40:21,246 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 19:40:21,246 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-03 19:40:21,325 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-03 19:40:21,325 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 231 places, 291 transitions, 3531 flow. Second operand has 8 states, 8 states have (on average 12.875) internal successors, (103), 8 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) [2024-06-03 19:40:21,325 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:40:21,326 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-03 19:40:21,326 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:40:22,234 INFO L124 PetriNetUnfolderBase]: 3043/4973 cut-off events. [2024-06-03 19:40:22,234 INFO L125 PetriNetUnfolderBase]: For 433154/433154 co-relation queries the response was YES. [2024-06-03 19:40:22,269 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40988 conditions, 4973 events. 3043/4973 cut-off events. For 433154/433154 co-relation queries the response was YES. Maximal size of possible extension queue 285. Compared 30239 event pairs, 766 based on Foata normal form. 1/4973 useless extension candidates. Maximal degree in co-relation 40882. Up to 4677 conditions per place. [2024-06-03 19:40:22,291 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 272 selfloop transitions, 15 changer transitions 0/300 dead transitions. [2024-06-03 19:40:22,291 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 237 places, 300 transitions, 4131 flow [2024-06-03 19:40:22,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 19:40:22,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 19:40:22,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 127 transitions. [2024-06-03 19:40:22,292 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4219269102990033 [2024-06-03 19:40:22,292 INFO L175 Difference]: Start difference. First operand has 231 places, 291 transitions, 3531 flow. Second operand 7 states and 127 transitions. [2024-06-03 19:40:22,292 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 237 places, 300 transitions, 4131 flow [2024-06-03 19:40:22,896 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 231 places, 300 transitions, 4029 flow, removed 26 selfloop flow, removed 6 redundant places. [2024-06-03 19:40:22,900 INFO L231 Difference]: Finished difference. Result has 232 places, 291 transitions, 3465 flow [2024-06-03 19:40:22,900 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3429, PETRI_DIFFERENCE_MINUEND_PLACES=225, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=291, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=276, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3465, PETRI_PLACES=232, PETRI_TRANSITIONS=291} [2024-06-03 19:40:22,900 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 188 predicate places. [2024-06-03 19:40:22,900 INFO L495 AbstractCegarLoop]: Abstraction has has 232 places, 291 transitions, 3465 flow [2024-06-03 19:40:22,901 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.875) internal successors, (103), 8 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) [2024-06-03 19:40:22,901 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:40:22,901 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:40:22,901 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2024-06-03 19:40:22,901 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)] === [2024-06-03 19:40:22,901 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:40:22,901 INFO L85 PathProgramCache]: Analyzing trace with hash -1050041970, now seen corresponding path program 1 times [2024-06-03 19:40:22,901 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:40:22,901 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [488195278] [2024-06-03 19:40:22,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:40:22,902 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:40:22,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:40:24,177 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:40:24,177 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:40:24,177 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [488195278] [2024-06-03 19:40:24,177 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [488195278] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:40:24,178 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:40:24,178 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-03 19:40:24,178 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2075730538] [2024-06-03 19:40:24,178 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:40:24,178 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-03 19:40:24,178 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:40:24,179 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-03 19:40:24,179 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-03 19:40:24,348 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-03 19:40:24,348 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 232 places, 291 transitions, 3465 flow. Second operand has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:40:24,348 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:40:24,348 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-03 19:40:24,348 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:40:25,536 INFO L124 PetriNetUnfolderBase]: 3379/5411 cut-off events. [2024-06-03 19:40:25,536 INFO L125 PetriNetUnfolderBase]: For 533791/533793 co-relation queries the response was YES. [2024-06-03 19:40:25,570 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45540 conditions, 5411 events. 3379/5411 cut-off events. For 533791/533793 co-relation queries the response was YES. Maximal size of possible extension queue 306. Compared 32372 event pairs, 649 based on Foata normal form. 14/5424 useless extension candidates. Maximal degree in co-relation 45433. Up to 4660 conditions per place. [2024-06-03 19:40:25,590 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 241 selfloop transitions, 91 changer transitions 0/344 dead transitions. [2024-06-03 19:40:25,591 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 241 places, 344 transitions, 4441 flow [2024-06-03 19:40:25,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 19:40:25,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 19:40:25,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 191 transitions. [2024-06-03 19:40:25,592 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4441860465116279 [2024-06-03 19:40:25,592 INFO L175 Difference]: Start difference. First operand has 232 places, 291 transitions, 3465 flow. Second operand 10 states and 191 transitions. [2024-06-03 19:40:25,592 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 241 places, 344 transitions, 4441 flow [2024-06-03 19:40:26,187 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 235 places, 344 transitions, 4393 flow, removed 5 selfloop flow, removed 6 redundant places. [2024-06-03 19:40:26,191 INFO L231 Difference]: Finished difference. Result has 237 places, 305 transitions, 3811 flow [2024-06-03 19:40:26,191 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3417, PETRI_DIFFERENCE_MINUEND_PLACES=226, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=291, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=77, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=212, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3811, PETRI_PLACES=237, PETRI_TRANSITIONS=305} [2024-06-03 19:40:26,192 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 193 predicate places. [2024-06-03 19:40:26,192 INFO L495 AbstractCegarLoop]: Abstraction has has 237 places, 305 transitions, 3811 flow [2024-06-03 19:40:26,192 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:40:26,192 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:40:26,192 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:40:26,192 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2024-06-03 19:40:26,192 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:40:26,193 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:40:26,193 INFO L85 PathProgramCache]: Analyzing trace with hash -1419410980, now seen corresponding path program 2 times [2024-06-03 19:40:26,193 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:40:26,193 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1661217821] [2024-06-03 19:40:26,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:40:26,193 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:40:26,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:40:27,727 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:40:27,728 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:40:27,728 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1661217821] [2024-06-03 19:40:27,728 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1661217821] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:40:27,728 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:40:27,728 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-03 19:40:27,728 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [527746962] [2024-06-03 19:40:27,728 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:40:27,728 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-03 19:40:27,728 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:40:27,728 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-03 19:40:27,729 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-03 19:40:27,848 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-03 19:40:27,848 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 237 places, 305 transitions, 3811 flow. Second operand has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:40:27,848 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:40:27,849 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-03 19:40:27,849 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:40:29,004 INFO L124 PetriNetUnfolderBase]: 3420/5488 cut-off events. [2024-06-03 19:40:29,004 INFO L125 PetriNetUnfolderBase]: For 551610/551612 co-relation queries the response was YES. [2024-06-03 19:40:29,044 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47121 conditions, 5488 events. 3420/5488 cut-off events. For 551610/551612 co-relation queries the response was YES. Maximal size of possible extension queue 315. Compared 32999 event pairs, 767 based on Foata normal form. 14/5501 useless extension candidates. Maximal degree in co-relation 47012. Up to 4923 conditions per place. [2024-06-03 19:40:29,066 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 259 selfloop transitions, 79 changer transitions 0/350 dead transitions. [2024-06-03 19:40:29,067 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 246 places, 350 transitions, 4759 flow [2024-06-03 19:40:29,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 19:40:29,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 19:40:29,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 189 transitions. [2024-06-03 19:40:29,068 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43953488372093025 [2024-06-03 19:40:29,068 INFO L175 Difference]: Start difference. First operand has 237 places, 305 transitions, 3811 flow. Second operand 10 states and 189 transitions. [2024-06-03 19:40:29,068 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 246 places, 350 transitions, 4759 flow [2024-06-03 19:40:29,708 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 240 places, 350 transitions, 4554 flow, removed 31 selfloop flow, removed 6 redundant places. [2024-06-03 19:40:29,712 INFO L231 Difference]: Finished difference. Result has 242 places, 312 transitions, 3941 flow [2024-06-03 19:40:29,712 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3612, PETRI_DIFFERENCE_MINUEND_PLACES=231, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=305, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=226, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3941, PETRI_PLACES=242, PETRI_TRANSITIONS=312} [2024-06-03 19:40:29,713 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 198 predicate places. [2024-06-03 19:40:29,713 INFO L495 AbstractCegarLoop]: Abstraction has has 242 places, 312 transitions, 3941 flow [2024-06-03 19:40:29,713 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:40:29,713 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:40:29,713 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:40:29,713 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2024-06-03 19:40:29,713 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:40:29,713 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:40:29,713 INFO L85 PathProgramCache]: Analyzing trace with hash -2037286360, now seen corresponding path program 3 times [2024-06-03 19:40:29,713 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:40:29,713 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2022765154] [2024-06-03 19:40:29,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:40:29,714 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:40:29,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:40:30,938 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:40:30,938 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:40:30,939 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2022765154] [2024-06-03 19:40:30,939 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2022765154] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:40:30,939 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:40:30,939 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-03 19:40:30,939 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [831238469] [2024-06-03 19:40:30,939 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:40:30,939 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-03 19:40:30,939 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:40:30,939 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-03 19:40:30,939 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-03 19:40:31,083 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-03 19:40:31,083 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 242 places, 312 transitions, 3941 flow. Second operand has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:40:31,083 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:40:31,083 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-03 19:40:31,083 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:40:32,415 INFO L124 PetriNetUnfolderBase]: 3460/5551 cut-off events. [2024-06-03 19:40:32,415 INFO L125 PetriNetUnfolderBase]: For 574965/574975 co-relation queries the response was YES. [2024-06-03 19:40:32,448 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47590 conditions, 5551 events. 3460/5551 cut-off events. For 574965/574975 co-relation queries the response was YES. Maximal size of possible extension queue 318. Compared 33383 event pairs, 685 based on Foata normal form. 14/5560 useless extension candidates. Maximal degree in co-relation 47479. Up to 5102 conditions per place. [2024-06-03 19:40:32,468 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 301 selfloop transitions, 42 changer transitions 0/355 dead transitions. [2024-06-03 19:40:32,469 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 251 places, 355 transitions, 4859 flow [2024-06-03 19:40:32,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 19:40:32,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 19:40:32,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 189 transitions. [2024-06-03 19:40:32,470 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43953488372093025 [2024-06-03 19:40:32,470 INFO L175 Difference]: Start difference. First operand has 242 places, 312 transitions, 3941 flow. Second operand 10 states and 189 transitions. [2024-06-03 19:40:32,470 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 251 places, 355 transitions, 4859 flow [2024-06-03 19:40:33,121 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 244 places, 355 transitions, 4672 flow, removed 27 selfloop flow, removed 7 redundant places. [2024-06-03 19:40:33,125 INFO L231 Difference]: Finished difference. Result has 246 places, 315 transitions, 3941 flow [2024-06-03 19:40:33,125 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3754, PETRI_DIFFERENCE_MINUEND_PLACES=235, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=312, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=271, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3941, PETRI_PLACES=246, PETRI_TRANSITIONS=315} [2024-06-03 19:40:33,125 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 202 predicate places. [2024-06-03 19:40:33,125 INFO L495 AbstractCegarLoop]: Abstraction has has 246 places, 315 transitions, 3941 flow [2024-06-03 19:40:33,125 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:40:33,125 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:40:33,125 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:40:33,125 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2024-06-03 19:40:33,126 INFO L420 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:40:33,126 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:40:33,126 INFO L85 PathProgramCache]: Analyzing trace with hash 25419362, now seen corresponding path program 4 times [2024-06-03 19:40:33,126 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:40:33,126 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [448360194] [2024-06-03 19:40:33,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:40:33,126 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:40:33,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:40:34,427 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:40:34,428 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:40:34,428 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [448360194] [2024-06-03 19:40:34,428 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [448360194] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:40:34,428 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:40:34,428 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-03 19:40:34,428 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1007704141] [2024-06-03 19:40:34,428 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:40:34,428 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-03 19:40:34,428 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:40:34,428 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-03 19:40:34,428 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-03 19:40:34,577 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-03 19:40:34,584 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 246 places, 315 transitions, 3941 flow. Second operand has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:40:34,584 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:40:34,584 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-03 19:40:34,584 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:40:35,873 INFO L124 PetriNetUnfolderBase]: 3502/5625 cut-off events. [2024-06-03 19:40:35,874 INFO L125 PetriNetUnfolderBase]: For 592139/592141 co-relation queries the response was YES. [2024-06-03 19:40:35,915 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48223 conditions, 5625 events. 3502/5625 cut-off events. For 592139/592141 co-relation queries the response was YES. Maximal size of possible extension queue 325. Compared 34079 event pairs, 837 based on Foata normal form. 14/5638 useless extension candidates. Maximal degree in co-relation 48110. Up to 5240 conditions per place. [2024-06-03 19:40:35,938 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 308 selfloop transitions, 33 changer transitions 0/353 dead transitions. [2024-06-03 19:40:35,938 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 255 places, 353 transitions, 4824 flow [2024-06-03 19:40:35,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 19:40:35,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 19:40:35,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 188 transitions. [2024-06-03 19:40:35,939 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4372093023255814 [2024-06-03 19:40:35,939 INFO L175 Difference]: Start difference. First operand has 246 places, 315 transitions, 3941 flow. Second operand 10 states and 188 transitions. [2024-06-03 19:40:35,939 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 255 places, 353 transitions, 4824 flow [2024-06-03 19:40:36,630 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 248 places, 353 transitions, 4676 flow, removed 34 selfloop flow, removed 7 redundant places. [2024-06-03 19:40:36,634 INFO L231 Difference]: Finished difference. Result has 250 places, 317 transitions, 3941 flow [2024-06-03 19:40:36,635 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3793, PETRI_DIFFERENCE_MINUEND_PLACES=239, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=315, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=282, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3941, PETRI_PLACES=250, PETRI_TRANSITIONS=317} [2024-06-03 19:40:36,635 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 206 predicate places. [2024-06-03 19:40:36,635 INFO L495 AbstractCegarLoop]: Abstraction has has 250 places, 317 transitions, 3941 flow [2024-06-03 19:40:36,635 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:40:36,635 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:40:36,635 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:40:36,635 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2024-06-03 19:40:36,635 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)] === [2024-06-03 19:40:36,635 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:40:36,635 INFO L85 PathProgramCache]: Analyzing trace with hash -145398388, now seen corresponding path program 5 times [2024-06-03 19:40:36,635 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:40:36,636 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [193887532] [2024-06-03 19:40:36,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:40:36,636 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:40:36,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:40:37,878 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:40:37,879 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:40:37,879 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [193887532] [2024-06-03 19:40:37,879 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [193887532] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:40:37,879 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:40:37,879 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-03 19:40:37,879 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2102306414] [2024-06-03 19:40:37,879 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:40:37,879 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-03 19:40:37,879 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:40:37,879 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-03 19:40:37,879 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-03 19:40:38,028 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-03 19:40:38,028 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 250 places, 317 transitions, 3941 flow. Second operand has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:40:38,028 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:40:38,028 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-03 19:40:38,028 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:40:39,274 INFO L124 PetriNetUnfolderBase]: 3543/5696 cut-off events. [2024-06-03 19:40:39,274 INFO L125 PetriNetUnfolderBase]: For 609159/609161 co-relation queries the response was YES. [2024-06-03 19:40:39,316 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48777 conditions, 5696 events. 3543/5696 cut-off events. For 609159/609161 co-relation queries the response was YES. Maximal size of possible extension queue 332. Compared 34624 event pairs, 837 based on Foata normal form. 14/5709 useless extension candidates. Maximal degree in co-relation 48662. Up to 5252 conditions per place. [2024-06-03 19:40:39,339 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 308 selfloop transitions, 38 changer transitions 0/358 dead transitions. [2024-06-03 19:40:39,339 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 259 places, 358 transitions, 4869 flow [2024-06-03 19:40:39,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 19:40:39,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 19:40:39,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 189 transitions. [2024-06-03 19:40:39,340 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43953488372093025 [2024-06-03 19:40:39,340 INFO L175 Difference]: Start difference. First operand has 250 places, 317 transitions, 3941 flow. Second operand 10 states and 189 transitions. [2024-06-03 19:40:39,341 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 259 places, 358 transitions, 4869 flow [2024-06-03 19:40:40,255 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 252 places, 358 transitions, 4760 flow, removed 24 selfloop flow, removed 7 redundant places. [2024-06-03 19:40:40,259 INFO L231 Difference]: Finished difference. Result has 254 places, 321 transitions, 4029 flow [2024-06-03 19:40:40,259 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3832, PETRI_DIFFERENCE_MINUEND_PLACES=243, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=317, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=281, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4029, PETRI_PLACES=254, PETRI_TRANSITIONS=321} [2024-06-03 19:40:40,260 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 210 predicate places. [2024-06-03 19:40:40,260 INFO L495 AbstractCegarLoop]: Abstraction has has 254 places, 321 transitions, 4029 flow [2024-06-03 19:40:40,260 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:40:40,260 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:40:40,260 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:40:40,260 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2024-06-03 19:40:40,260 INFO L420 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:40:40,260 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:40:40,260 INFO L85 PathProgramCache]: Analyzing trace with hash -723353830, now seen corresponding path program 1 times [2024-06-03 19:40:40,260 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:40:40,260 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2051025274] [2024-06-03 19:40:40,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:40:40,260 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:40:40,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:40:40,972 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:40:40,972 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:40:40,972 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2051025274] [2024-06-03 19:40:40,972 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2051025274] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:40:40,972 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:40:40,972 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 19:40:40,972 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [962065488] [2024-06-03 19:40:40,972 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:40:40,972 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 19:40:40,973 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:40:40,973 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 19:40:40,973 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-03 19:40:41,045 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-03 19:40:41,045 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 254 places, 321 transitions, 4029 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) [2024-06-03 19:40:41,045 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:40:41,045 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-03 19:40:41,045 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:40:42,126 INFO L124 PetriNetUnfolderBase]: 3569/5734 cut-off events. [2024-06-03 19:40:42,126 INFO L125 PetriNetUnfolderBase]: For 610189/610191 co-relation queries the response was YES. [2024-06-03 19:40:42,170 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49386 conditions, 5734 events. 3569/5734 cut-off events. For 610189/610191 co-relation queries the response was YES. Maximal size of possible extension queue 334. Compared 34910 event pairs, 866 based on Foata normal form. 4/5737 useless extension candidates. Maximal degree in co-relation 49269. Up to 5429 conditions per place. [2024-06-03 19:40:42,194 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 309 selfloop transitions, 31 changer transitions 0/352 dead transitions. [2024-06-03 19:40:42,194 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 260 places, 352 transitions, 5075 flow [2024-06-03 19:40:42,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 19:40:42,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 19:40:42,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 136 transitions. [2024-06-03 19:40:42,195 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45182724252491696 [2024-06-03 19:40:42,195 INFO L175 Difference]: Start difference. First operand has 254 places, 321 transitions, 4029 flow. Second operand 7 states and 136 transitions. [2024-06-03 19:40:42,195 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 260 places, 352 transitions, 5075 flow [2024-06-03 19:40:43,034 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 253 places, 352 transitions, 4927 flow, removed 38 selfloop flow, removed 7 redundant places. [2024-06-03 19:40:43,038 INFO L231 Difference]: Finished difference. Result has 255 places, 332 transitions, 4125 flow [2024-06-03 19:40:43,038 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3881, PETRI_DIFFERENCE_MINUEND_PLACES=247, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=321, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=293, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4125, PETRI_PLACES=255, PETRI_TRANSITIONS=332} [2024-06-03 19:40:43,039 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 211 predicate places. [2024-06-03 19:40:43,039 INFO L495 AbstractCegarLoop]: Abstraction has has 255 places, 332 transitions, 4125 flow [2024-06-03 19:40:43,039 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) [2024-06-03 19:40:43,039 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:40:43,039 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:40:43,039 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2024-06-03 19:40:43,039 INFO L420 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:40:43,040 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:40:43,040 INFO L85 PathProgramCache]: Analyzing trace with hash 51293030, now seen corresponding path program 2 times [2024-06-03 19:40:43,040 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:40:43,040 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [204028470] [2024-06-03 19:40:43,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:40:43,040 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:40:43,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:40:43,727 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:40:43,727 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:40:43,727 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [204028470] [2024-06-03 19:40:43,727 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [204028470] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:40:43,727 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:40:43,727 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 19:40:43,727 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [806865789] [2024-06-03 19:40:43,727 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:40:43,727 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 19:40:43,727 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:40:43,728 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 19:40:43,728 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-03 19:40:43,794 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-03 19:40:43,794 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 255 places, 332 transitions, 4125 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) [2024-06-03 19:40:43,794 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:40:43,794 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-03 19:40:43,794 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:40:44,933 INFO L124 PetriNetUnfolderBase]: 3579/5750 cut-off events. [2024-06-03 19:40:44,934 INFO L125 PetriNetUnfolderBase]: For 622353/622355 co-relation queries the response was YES. [2024-06-03 19:40:44,976 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49879 conditions, 5750 events. 3579/5750 cut-off events. For 622353/622355 co-relation queries the response was YES. Maximal size of possible extension queue 336. Compared 35057 event pairs, 866 based on Foata normal form. 4/5753 useless extension candidates. Maximal degree in co-relation 49760. Up to 5482 conditions per place. [2024-06-03 19:40:44,999 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 312 selfloop transitions, 27 changer transitions 0/351 dead transitions. [2024-06-03 19:40:45,000 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 261 places, 351 transitions, 4938 flow [2024-06-03 19:40:45,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 19:40:45,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 19:40:45,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 130 transitions. [2024-06-03 19:40:45,000 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4318936877076412 [2024-06-03 19:40:45,000 INFO L175 Difference]: Start difference. First operand has 255 places, 332 transitions, 4125 flow. Second operand 7 states and 130 transitions. [2024-06-03 19:40:45,001 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 261 places, 351 transitions, 4938 flow [2024-06-03 19:40:45,869 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 259 places, 351 transitions, 4819 flow, removed 55 selfloop flow, removed 2 redundant places. [2024-06-03 19:40:45,873 INFO L231 Difference]: Finished difference. Result has 260 places, 336 transitions, 4147 flow [2024-06-03 19:40:45,874 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4038, PETRI_DIFFERENCE_MINUEND_PLACES=253, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=332, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=306, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4147, PETRI_PLACES=260, PETRI_TRANSITIONS=336} [2024-06-03 19:40:45,874 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 216 predicate places. [2024-06-03 19:40:45,874 INFO L495 AbstractCegarLoop]: Abstraction has has 260 places, 336 transitions, 4147 flow [2024-06-03 19:40:45,874 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) [2024-06-03 19:40:45,874 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:40:45,874 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:40:45,874 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2024-06-03 19:40:45,874 INFO L420 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:40:45,874 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:40:45,874 INFO L85 PathProgramCache]: Analyzing trace with hash -717631974, now seen corresponding path program 1 times [2024-06-03 19:40:45,874 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:40:45,875 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [670330670] [2024-06-03 19:40:45,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:40:45,875 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:40:45,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:40:46,668 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:40:46,669 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:40:46,669 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [670330670] [2024-06-03 19:40:46,669 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [670330670] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:40:46,669 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:40:46,669 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:40:46,669 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1791505384] [2024-06-03 19:40:46,669 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:40:46,670 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:40:46,670 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:40:46,670 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:40:46,670 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:40:46,752 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-03 19:40:46,752 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 260 places, 336 transitions, 4147 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) [2024-06-03 19:40:46,752 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:40:46,752 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-03 19:40:46,752 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:40:48,047 INFO L124 PetriNetUnfolderBase]: 3675/5848 cut-off events. [2024-06-03 19:40:48,047 INFO L125 PetriNetUnfolderBase]: For 636307/636307 co-relation queries the response was YES. [2024-06-03 19:40:48,092 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50649 conditions, 5848 events. 3675/5848 cut-off events. For 636307/636307 co-relation queries the response was YES. Maximal size of possible extension queue 337. Compared 35122 event pairs, 837 based on Foata normal form. 2/5849 useless extension candidates. Maximal degree in co-relation 50528. Up to 5573 conditions per place. [2024-06-03 19:40:48,115 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 302 selfloop transitions, 58 changer transitions 0/364 dead transitions. [2024-06-03 19:40:48,115 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 267 places, 364 transitions, 5201 flow [2024-06-03 19:40:48,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:40:48,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:40:48,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 145 transitions. [2024-06-03 19:40:48,116 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42151162790697677 [2024-06-03 19:40:48,116 INFO L175 Difference]: Start difference. First operand has 260 places, 336 transitions, 4147 flow. Second operand 8 states and 145 transitions. [2024-06-03 19:40:48,116 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 267 places, 364 transitions, 5201 flow [2024-06-03 19:40:48,964 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 263 places, 364 transitions, 5131 flow, removed 13 selfloop flow, removed 4 redundant places. [2024-06-03 19:40:48,968 INFO L231 Difference]: Finished difference. Result has 265 places, 345 transitions, 4318 flow [2024-06-03 19:40:48,968 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4077, PETRI_DIFFERENCE_MINUEND_PLACES=256, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=336, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=282, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4318, PETRI_PLACES=265, PETRI_TRANSITIONS=345} [2024-06-03 19:40:48,969 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 221 predicate places. [2024-06-03 19:40:48,969 INFO L495 AbstractCegarLoop]: Abstraction has has 265 places, 345 transitions, 4318 flow [2024-06-03 19:40:48,969 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) [2024-06-03 19:40:48,969 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:40:48,969 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:40:48,969 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2024-06-03 19:40:48,969 INFO L420 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:40:48,969 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:40:48,970 INFO L85 PathProgramCache]: Analyzing trace with hash -1184221606, now seen corresponding path program 6 times [2024-06-03 19:40:48,970 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:40:48,970 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [313642600] [2024-06-03 19:40:48,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:40:48,970 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:40:48,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:40:50,273 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:40:50,273 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:40:50,273 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [313642600] [2024-06-03 19:40:50,273 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [313642600] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:40:50,273 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:40:50,273 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-03 19:40:50,273 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [906394493] [2024-06-03 19:40:50,274 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:40:50,274 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-03 19:40:50,274 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:40:50,274 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-03 19:40:50,274 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-06-03 19:40:50,462 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-03 19:40:50,462 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 265 places, 345 transitions, 4318 flow. Second operand has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:40:50,462 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:40:50,462 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-03 19:40:50,462 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:40:51,947 INFO L124 PetriNetUnfolderBase]: 3645/5867 cut-off events. [2024-06-03 19:40:51,947 INFO L125 PetriNetUnfolderBase]: For 679339/679343 co-relation queries the response was YES. [2024-06-03 19:40:51,990 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51572 conditions, 5867 events. 3645/5867 cut-off events. For 679339/679343 co-relation queries the response was YES. Maximal size of possible extension queue 347. Compared 35941 event pairs, 869 based on Foata normal form. 16/5882 useless extension candidates. Maximal degree in co-relation 51449. Up to 5392 conditions per place. [2024-06-03 19:40:52,014 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 317 selfloop transitions, 53 changer transitions 0/382 dead transitions. [2024-06-03 19:40:52,014 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 274 places, 382 transitions, 5264 flow [2024-06-03 19:40:52,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 19:40:52,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 19:40:52,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 189 transitions. [2024-06-03 19:40:52,015 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43953488372093025 [2024-06-03 19:40:52,015 INFO L175 Difference]: Start difference. First operand has 265 places, 345 transitions, 4318 flow. Second operand 10 states and 189 transitions. [2024-06-03 19:40:52,015 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 274 places, 382 transitions, 5264 flow [2024-06-03 19:40:52,865 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 271 places, 382 transitions, 5205 flow, removed 19 selfloop flow, removed 3 redundant places. [2024-06-03 19:40:52,870 INFO L231 Difference]: Finished difference. Result has 273 places, 348 transitions, 4460 flow [2024-06-03 19:40:52,870 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4259, PETRI_DIFFERENCE_MINUEND_PLACES=262, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=345, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=292, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4460, PETRI_PLACES=273, PETRI_TRANSITIONS=348} [2024-06-03 19:40:52,870 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 229 predicate places. [2024-06-03 19:40:52,870 INFO L495 AbstractCegarLoop]: Abstraction has has 273 places, 348 transitions, 4460 flow [2024-06-03 19:40:52,870 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:40:52,870 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:40:52,870 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:40:52,871 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2024-06-03 19:40:52,871 INFO L420 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:40:52,871 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:40:52,871 INFO L85 PathProgramCache]: Analyzing trace with hash -1184336926, now seen corresponding path program 7 times [2024-06-03 19:40:52,871 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:40:52,871 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1053710664] [2024-06-03 19:40:52,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:40:52,871 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:40:52,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:40:54,380 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:40:54,380 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:40:54,380 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1053710664] [2024-06-03 19:40:54,380 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1053710664] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:40:54,380 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:40:54,380 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-03 19:40:54,380 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1595491697] [2024-06-03 19:40:54,380 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:40:54,380 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-03 19:40:54,380 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:40:54,381 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-03 19:40:54,381 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-03 19:40:54,530 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-03 19:40:54,531 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 273 places, 348 transitions, 4460 flow. Second operand has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:40:54,531 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:40:54,531 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-03 19:40:54,531 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:40:55,881 INFO L124 PetriNetUnfolderBase]: 3625/5835 cut-off events. [2024-06-03 19:40:55,881 INFO L125 PetriNetUnfolderBase]: For 674787/674791 co-relation queries the response was YES. [2024-06-03 19:40:55,928 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50957 conditions, 5835 events. 3625/5835 cut-off events. For 674787/674791 co-relation queries the response was YES. Maximal size of possible extension queue 345. Compared 35754 event pairs, 835 based on Foata normal form. 16/5850 useless extension candidates. Maximal degree in co-relation 50830. Up to 5283 conditions per place. [2024-06-03 19:40:55,954 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 315 selfloop transitions, 59 changer transitions 0/386 dead transitions. [2024-06-03 19:40:55,954 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 282 places, 386 transitions, 5368 flow [2024-06-03 19:40:55,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 19:40:55,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 19:40:55,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 190 transitions. [2024-06-03 19:40:55,956 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4418604651162791 [2024-06-03 19:40:55,956 INFO L175 Difference]: Start difference. First operand has 273 places, 348 transitions, 4460 flow. Second operand 10 states and 190 transitions. [2024-06-03 19:40:55,956 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 282 places, 386 transitions, 5368 flow [2024-06-03 19:40:57,025 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 275 places, 386 transitions, 5217 flow, removed 25 selfloop flow, removed 7 redundant places. [2024-06-03 19:40:57,030 INFO L231 Difference]: Finished difference. Result has 277 places, 351 transitions, 4478 flow [2024-06-03 19:40:57,030 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4309, PETRI_DIFFERENCE_MINUEND_PLACES=266, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=348, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=291, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4478, PETRI_PLACES=277, PETRI_TRANSITIONS=351} [2024-06-03 19:40:57,030 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 233 predicate places. [2024-06-03 19:40:57,030 INFO L495 AbstractCegarLoop]: Abstraction has has 277 places, 351 transitions, 4478 flow [2024-06-03 19:40:57,030 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:40:57,030 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:40:57,030 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:40:57,030 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2024-06-03 19:40:57,031 INFO L420 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:40:57,031 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:40:57,031 INFO L85 PathProgramCache]: Analyzing trace with hash -1013519176, now seen corresponding path program 8 times [2024-06-03 19:40:57,031 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:40:57,031 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [389289222] [2024-06-03 19:40:57,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:40:57,031 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:40:57,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:40:58,296 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:40:58,296 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:40:58,296 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [389289222] [2024-06-03 19:40:58,296 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [389289222] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:40:58,296 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:40:58,296 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-03 19:40:58,296 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1106722622] [2024-06-03 19:40:58,296 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:40:58,296 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-03 19:40:58,296 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:40:58,297 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-03 19:40:58,297 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-03 19:40:58,427 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-03 19:40:58,428 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 277 places, 351 transitions, 4478 flow. Second operand has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:40:58,428 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:40:58,428 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-03 19:40:58,428 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:40:59,836 INFO L124 PetriNetUnfolderBase]: 3605/5803 cut-off events. [2024-06-03 19:40:59,836 INFO L125 PetriNetUnfolderBase]: For 663015/663019 co-relation queries the response was YES. [2024-06-03 19:40:59,879 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50066 conditions, 5803 events. 3605/5803 cut-off events. For 663015/663019 co-relation queries the response was YES. Maximal size of possible extension queue 343. Compared 35490 event pairs, 841 based on Foata normal form. 16/5818 useless extension candidates. Maximal degree in co-relation 49937. Up to 5328 conditions per place. [2024-06-03 19:40:59,901 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 322 selfloop transitions, 52 changer transitions 0/386 dead transitions. [2024-06-03 19:40:59,901 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 286 places, 386 transitions, 5361 flow [2024-06-03 19:40:59,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 19:40:59,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 19:40:59,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 190 transitions. [2024-06-03 19:40:59,903 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4418604651162791 [2024-06-03 19:40:59,903 INFO L175 Difference]: Start difference. First operand has 277 places, 351 transitions, 4478 flow. Second operand 10 states and 190 transitions. [2024-06-03 19:40:59,903 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 286 places, 386 transitions, 5361 flow [2024-06-03 19:41:00,943 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 276 places, 386 transitions, 4952 flow, removed 41 selfloop flow, removed 10 redundant places. [2024-06-03 19:41:00,947 INFO L231 Difference]: Finished difference. Result has 278 places, 352 transitions, 4193 flow [2024-06-03 19:41:00,947 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4071, PETRI_DIFFERENCE_MINUEND_PLACES=267, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=351, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=299, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4193, PETRI_PLACES=278, PETRI_TRANSITIONS=352} [2024-06-03 19:41:00,947 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 234 predicate places. [2024-06-03 19:41:00,947 INFO L495 AbstractCegarLoop]: Abstraction has has 278 places, 352 transitions, 4193 flow [2024-06-03 19:41:00,947 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:41:00,947 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:41:00,948 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:41:00,948 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2024-06-03 19:41:00,948 INFO L420 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:41:00,948 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:41:00,948 INFO L85 PathProgramCache]: Analyzing trace with hash 2007991598, now seen corresponding path program 9 times [2024-06-03 19:41:00,948 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:41:00,948 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1560241540] [2024-06-03 19:41:00,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:41:00,948 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:41:00,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:41:02,241 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:41:02,242 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:41:02,242 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1560241540] [2024-06-03 19:41:02,242 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1560241540] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:41:02,242 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:41:02,242 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-03 19:41:02,242 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1672307548] [2024-06-03 19:41:02,242 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:41:02,242 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-03 19:41:02,242 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:41:02,242 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-03 19:41:02,242 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-03 19:41:02,393 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-03 19:41:02,394 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 278 places, 352 transitions, 4193 flow. Second operand has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:41:02,394 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:41:02,394 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-03 19:41:02,394 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:41:03,712 INFO L124 PetriNetUnfolderBase]: 3585/5771 cut-off events. [2024-06-03 19:41:03,712 INFO L125 PetriNetUnfolderBase]: For 646847/646851 co-relation queries the response was YES. [2024-06-03 19:41:03,761 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47879 conditions, 5771 events. 3585/5771 cut-off events. For 646847/646851 co-relation queries the response was YES. Maximal size of possible extension queue 341. Compared 35315 event pairs, 827 based on Foata normal form. 16/5786 useless extension candidates. Maximal degree in co-relation 47751. Up to 5296 conditions per place. [2024-06-03 19:41:03,785 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 319 selfloop transitions, 54 changer transitions 0/385 dead transitions. [2024-06-03 19:41:03,785 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 286 places, 385 transitions, 4953 flow [2024-06-03 19:41:03,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 19:41:03,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 19:41:03,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 187 transitions. [2024-06-03 19:41:03,786 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43488372093023253 [2024-06-03 19:41:03,786 INFO L175 Difference]: Start difference. First operand has 278 places, 352 transitions, 4193 flow. Second operand 10 states and 187 transitions. [2024-06-03 19:41:03,786 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 286 places, 385 transitions, 4953 flow [2024-06-03 19:41:04,559 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 277 places, 385 transitions, 4744 flow, removed 40 selfloop flow, removed 9 redundant places. [2024-06-03 19:41:04,563 INFO L231 Difference]: Finished difference. Result has 278 places, 351 transitions, 3984 flow [2024-06-03 19:41:04,563 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3872, PETRI_DIFFERENCE_MINUEND_PLACES=268, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=351, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=297, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3984, PETRI_PLACES=278, PETRI_TRANSITIONS=351} [2024-06-03 19:41:04,563 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 234 predicate places. [2024-06-03 19:41:04,563 INFO L495 AbstractCegarLoop]: Abstraction has has 278 places, 351 transitions, 3984 flow [2024-06-03 19:41:04,563 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:41:04,563 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:41:04,564 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:41:04,564 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2024-06-03 19:41:04,564 INFO L420 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:41:04,564 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:41:04,564 INFO L85 PathProgramCache]: Analyzing trace with hash -1510658404, now seen corresponding path program 3 times [2024-06-03 19:41:04,564 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:41:04,564 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1634510735] [2024-06-03 19:41:04,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:41:04,565 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:41:04,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:41:05,300 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:41:05,300 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:41:05,300 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1634510735] [2024-06-03 19:41:05,300 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1634510735] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:41:05,300 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:41:05,300 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 19:41:05,300 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [790044513] [2024-06-03 19:41:05,300 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:41:05,300 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 19:41:05,300 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:41:05,300 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 19:41:05,301 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-03 19:41:05,361 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-03 19:41:05,361 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 278 places, 351 transitions, 3984 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) [2024-06-03 19:41:05,361 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:41:05,361 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-03 19:41:05,361 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:41:06,441 INFO L124 PetriNetUnfolderBase]: 3603/5798 cut-off events. [2024-06-03 19:41:06,442 INFO L125 PetriNetUnfolderBase]: For 637079/637083 co-relation queries the response was YES. [2024-06-03 19:41:06,487 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47812 conditions, 5798 events. 3603/5798 cut-off events. For 637079/637083 co-relation queries the response was YES. Maximal size of possible extension queue 343. Compared 35526 event pairs, 846 based on Foata normal form. 6/5803 useless extension candidates. Maximal degree in co-relation 47685. Up to 5428 conditions per place. [2024-06-03 19:41:06,511 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 316 selfloop transitions, 49 changer transitions 0/377 dead transitions. [2024-06-03 19:41:06,511 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 284 places, 377 transitions, 5240 flow [2024-06-03 19:41:06,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 19:41:06,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 19:41:06,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 136 transitions. [2024-06-03 19:41:06,512 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45182724252491696 [2024-06-03 19:41:06,512 INFO L175 Difference]: Start difference. First operand has 278 places, 351 transitions, 3984 flow. Second operand 7 states and 136 transitions. [2024-06-03 19:41:06,512 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 284 places, 377 transitions, 5240 flow [2024-06-03 19:41:07,175 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 273 places, 377 transitions, 5048 flow, removed 10 selfloop flow, removed 11 redundant places. [2024-06-03 19:41:07,180 INFO L231 Difference]: Finished difference. Result has 274 places, 357 transitions, 4027 flow [2024-06-03 19:41:07,180 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3792, PETRI_DIFFERENCE_MINUEND_PLACES=267, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=351, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=305, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4027, PETRI_PLACES=274, PETRI_TRANSITIONS=357} [2024-06-03 19:41:07,180 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 230 predicate places. [2024-06-03 19:41:07,180 INFO L495 AbstractCegarLoop]: Abstraction has has 274 places, 357 transitions, 4027 flow [2024-06-03 19:41:07,180 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) [2024-06-03 19:41:07,180 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:41:07,181 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:41:07,181 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2024-06-03 19:41:07,181 INFO L420 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:41:07,181 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:41:07,181 INFO L85 PathProgramCache]: Analyzing trace with hash -1499230564, now seen corresponding path program 4 times [2024-06-03 19:41:07,181 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:41:07,181 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [389003434] [2024-06-03 19:41:07,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:41:07,181 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:41:07,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:41:07,927 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:41:07,927 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:41:07,927 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [389003434] [2024-06-03 19:41:07,927 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [389003434] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:41:07,927 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:41:07,927 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 19:41:07,927 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1984437076] [2024-06-03 19:41:07,927 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:41:07,928 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 19:41:07,928 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:41:07,928 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 19:41:07,928 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-03 19:41:07,987 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-03 19:41:07,987 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 274 places, 357 transitions, 4027 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) [2024-06-03 19:41:07,987 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:41:07,988 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-03 19:41:07,988 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:41:09,101 INFO L124 PetriNetUnfolderBase]: 3611/5809 cut-off events. [2024-06-03 19:41:09,102 INFO L125 PetriNetUnfolderBase]: For 654320/654334 co-relation queries the response was YES. [2024-06-03 19:41:09,148 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48247 conditions, 5809 events. 3611/5809 cut-off events. For 654320/654334 co-relation queries the response was YES. Maximal size of possible extension queue 344. Compared 35572 event pairs, 846 based on Foata normal form. 6/5809 useless extension candidates. Maximal degree in co-relation 48121. Up to 5434 conditions per place. [2024-06-03 19:41:09,172 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 311 selfloop transitions, 53 changer transitions 0/376 dead transitions. [2024-06-03 19:41:09,172 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 280 places, 376 transitions, 5063 flow [2024-06-03 19:41:09,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 19:41:09,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 19:41:09,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 132 transitions. [2024-06-03 19:41:09,173 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43853820598006643 [2024-06-03 19:41:09,173 INFO L175 Difference]: Start difference. First operand has 274 places, 357 transitions, 4027 flow. Second operand 7 states and 132 transitions. [2024-06-03 19:41:09,173 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 280 places, 376 transitions, 5063 flow [2024-06-03 19:41:10,026 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 277 places, 376 transitions, 4891 flow, removed 63 selfloop flow, removed 3 redundant places. [2024-06-03 19:41:10,031 INFO L231 Difference]: Finished difference. Result has 278 places, 360 transitions, 4035 flow [2024-06-03 19:41:10,031 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3889, PETRI_DIFFERENCE_MINUEND_PLACES=271, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=357, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=307, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4035, PETRI_PLACES=278, PETRI_TRANSITIONS=360} [2024-06-03 19:41:10,031 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 234 predicate places. [2024-06-03 19:41:10,031 INFO L495 AbstractCegarLoop]: Abstraction has has 278 places, 360 transitions, 4035 flow [2024-06-03 19:41:10,031 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) [2024-06-03 19:41:10,031 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:41:10,031 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:41:10,031 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2024-06-03 19:41:10,032 INFO L420 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:41:10,032 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:41:10,032 INFO L85 PathProgramCache]: Analyzing trace with hash -687668428, now seen corresponding path program 5 times [2024-06-03 19:41:10,032 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:41:10,032 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [994745052] [2024-06-03 19:41:10,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:41:10,032 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:41:10,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:41:10,748 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:41:10,748 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:41:10,748 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [994745052] [2024-06-03 19:41:10,748 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [994745052] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:41:10,748 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:41:10,748 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 19:41:10,748 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [962575460] [2024-06-03 19:41:10,748 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:41:10,748 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 19:41:10,749 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:41:10,749 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 19:41:10,749 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-03 19:41:10,817 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-03 19:41:10,817 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 278 places, 360 transitions, 4035 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) [2024-06-03 19:41:10,817 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:41:10,817 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-03 19:41:10,817 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:41:11,908 INFO L124 PetriNetUnfolderBase]: 3605/5800 cut-off events. [2024-06-03 19:41:11,909 INFO L125 PetriNetUnfolderBase]: For 662079/662093 co-relation queries the response was YES. [2024-06-03 19:41:11,955 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48080 conditions, 5800 events. 3605/5800 cut-off events. For 662079/662093 co-relation queries the response was YES. Maximal size of possible extension queue 343. Compared 35498 event pairs, 842 based on Foata normal form. 6/5800 useless extension candidates. Maximal degree in co-relation 47952. Up to 5507 conditions per place. [2024-06-03 19:41:11,979 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 326 selfloop transitions, 34 changer transitions 0/372 dead transitions. [2024-06-03 19:41:11,979 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 284 places, 372 transitions, 4969 flow [2024-06-03 19:41:11,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 19:41:11,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 19:41:11,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 126 transitions. [2024-06-03 19:41:11,980 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4186046511627907 [2024-06-03 19:41:11,980 INFO L175 Difference]: Start difference. First operand has 278 places, 360 transitions, 4035 flow. Second operand 7 states and 126 transitions. [2024-06-03 19:41:11,980 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 284 places, 372 transitions, 4969 flow [2024-06-03 19:41:12,776 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 280 places, 372 transitions, 4861 flow, removed 18 selfloop flow, removed 4 redundant places. [2024-06-03 19:41:12,780 INFO L231 Difference]: Finished difference. Result has 281 places, 360 transitions, 4001 flow [2024-06-03 19:41:12,781 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3927, PETRI_DIFFERENCE_MINUEND_PLACES=274, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=360, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=326, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4001, PETRI_PLACES=281, PETRI_TRANSITIONS=360} [2024-06-03 19:41:12,781 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 237 predicate places. [2024-06-03 19:41:12,781 INFO L495 AbstractCegarLoop]: Abstraction has has 281 places, 360 transitions, 4001 flow [2024-06-03 19:41:12,781 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) [2024-06-03 19:41:12,781 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:41:12,781 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:41:12,782 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2024-06-03 19:41:12,782 INFO L420 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:41:12,782 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:41:12,782 INFO L85 PathProgramCache]: Analyzing trace with hash 1909399678, now seen corresponding path program 6 times [2024-06-03 19:41:12,782 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:41:12,782 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1177074170] [2024-06-03 19:41:12,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:41:12,782 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:41:12,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:41:13,467 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:41:13,467 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:41:13,467 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1177074170] [2024-06-03 19:41:13,467 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1177074170] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:41:13,467 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:41:13,467 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 19:41:13,467 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [698240686] [2024-06-03 19:41:13,467 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:41:13,467 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 19:41:13,467 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:41:13,467 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 19:41:13,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-03 19:41:13,537 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-03 19:41:13,537 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 281 places, 360 transitions, 4001 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) [2024-06-03 19:41:13,537 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:41:13,537 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-03 19:41:13,537 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:41:14,680 INFO L124 PetriNetUnfolderBase]: 3603/5797 cut-off events. [2024-06-03 19:41:14,680 INFO L125 PetriNetUnfolderBase]: For 671208/671212 co-relation queries the response was YES. [2024-06-03 19:41:14,726 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48009 conditions, 5797 events. 3603/5797 cut-off events. For 671208/671212 co-relation queries the response was YES. Maximal size of possible extension queue 340. Compared 35429 event pairs, 841 based on Foata normal form. 6/5802 useless extension candidates. Maximal degree in co-relation 47880. Up to 5521 conditions per place. [2024-06-03 19:41:14,749 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 332 selfloop transitions, 26 changer transitions 0/370 dead transitions. [2024-06-03 19:41:14,749 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 287 places, 370 transitions, 4759 flow [2024-06-03 19:41:14,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 19:41:14,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 19:41:14,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 123 transitions. [2024-06-03 19:41:14,750 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40863787375415284 [2024-06-03 19:41:14,750 INFO L175 Difference]: Start difference. First operand has 281 places, 360 transitions, 4001 flow. Second operand 7 states and 123 transitions. [2024-06-03 19:41:14,750 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 287 places, 370 transitions, 4759 flow [2024-06-03 19:41:15,577 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 282 places, 370 transitions, 4643 flow, removed 17 selfloop flow, removed 5 redundant places. [2024-06-03 19:41:15,581 INFO L231 Difference]: Finished difference. Result has 283 places, 360 transitions, 3943 flow [2024-06-03 19:41:15,581 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3885, PETRI_DIFFERENCE_MINUEND_PLACES=276, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=360, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=334, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3943, PETRI_PLACES=283, PETRI_TRANSITIONS=360} [2024-06-03 19:41:15,582 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 239 predicate places. [2024-06-03 19:41:15,582 INFO L495 AbstractCegarLoop]: Abstraction has has 283 places, 360 transitions, 3943 flow [2024-06-03 19:41:15,582 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) [2024-06-03 19:41:15,582 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:41:15,582 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:41:15,582 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2024-06-03 19:41:15,582 INFO L420 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:41:15,582 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:41:15,582 INFO L85 PathProgramCache]: Analyzing trace with hash -295926694, now seen corresponding path program 2 times [2024-06-03 19:41:15,583 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:41:15,583 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1903427887] [2024-06-03 19:41:15,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:41:15,583 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:41:15,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:41:16,376 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:41:16,376 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:41:16,376 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1903427887] [2024-06-03 19:41:16,376 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1903427887] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:41:16,376 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:41:16,376 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:41:16,376 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1256143434] [2024-06-03 19:41:16,376 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:41:16,377 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:41:16,377 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:41:16,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:41:16,377 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:41:16,442 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-03 19:41:16,442 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 283 places, 360 transitions, 3943 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) [2024-06-03 19:41:16,443 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:41:16,443 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-03 19:41:16,443 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:41:17,803 INFO L124 PetriNetUnfolderBase]: 3699/5896 cut-off events. [2024-06-03 19:41:17,804 INFO L125 PetriNetUnfolderBase]: For 685554/685554 co-relation queries the response was YES. [2024-06-03 19:41:17,855 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48758 conditions, 5896 events. 3699/5896 cut-off events. For 685554/685554 co-relation queries the response was YES. Maximal size of possible extension queue 342. Compared 35543 event pairs, 813 based on Foata normal form. 2/5897 useless extension candidates. Maximal degree in co-relation 48629. Up to 5608 conditions per place. [2024-06-03 19:41:17,880 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 309 selfloop transitions, 64 changer transitions 0/377 dead transitions. [2024-06-03 19:41:17,880 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 290 places, 377 transitions, 4975 flow [2024-06-03 19:41:17,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:41:17,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:41:17,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 137 transitions. [2024-06-03 19:41:17,881 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39825581395348836 [2024-06-03 19:41:17,881 INFO L175 Difference]: Start difference. First operand has 283 places, 360 transitions, 3943 flow. Second operand 8 states and 137 transitions. [2024-06-03 19:41:17,881 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 290 places, 377 transitions, 4975 flow [2024-06-03 19:41:18,683 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 282 places, 377 transitions, 4869 flow, removed 3 selfloop flow, removed 8 redundant places. [2024-06-03 19:41:18,687 INFO L231 Difference]: Finished difference. Result has 283 places, 363 transitions, 4021 flow [2024-06-03 19:41:18,688 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3837, PETRI_DIFFERENCE_MINUEND_PLACES=275, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=360, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=299, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4021, PETRI_PLACES=283, PETRI_TRANSITIONS=363} [2024-06-03 19:41:18,688 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 239 predicate places. [2024-06-03 19:41:18,688 INFO L495 AbstractCegarLoop]: Abstraction has has 283 places, 363 transitions, 4021 flow [2024-06-03 19:41:18,688 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) [2024-06-03 19:41:18,688 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:41:18,689 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:41:18,689 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2024-06-03 19:41:18,689 INFO L420 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:41:18,689 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:41:18,689 INFO L85 PathProgramCache]: Analyzing trace with hash 1909782404, now seen corresponding path program 3 times [2024-06-03 19:41:18,689 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:41:18,689 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [87709817] [2024-06-03 19:41:18,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:41:18,690 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:41:18,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:41:19,479 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:41:19,479 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:41:19,479 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [87709817] [2024-06-03 19:41:19,479 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [87709817] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:41:19,479 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:41:19,480 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:41:19,480 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1338234006] [2024-06-03 19:41:19,480 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:41:19,480 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:41:19,480 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:41:19,480 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:41:19,480 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:41:19,573 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-03 19:41:19,573 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 283 places, 363 transitions, 4021 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) [2024-06-03 19:41:19,573 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:41:19,574 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-03 19:41:19,574 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:41:20,911 INFO L124 PetriNetUnfolderBase]: 3709/5908 cut-off events. [2024-06-03 19:41:20,911 INFO L125 PetriNetUnfolderBase]: For 702012/702012 co-relation queries the response was YES. [2024-06-03 19:41:20,960 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49152 conditions, 5908 events. 3709/5908 cut-off events. For 702012/702012 co-relation queries the response was YES. Maximal size of possible extension queue 342. Compared 35610 event pairs, 813 based on Foata normal form. 2/5909 useless extension candidates. Maximal degree in co-relation 49022. Up to 5618 conditions per place. [2024-06-03 19:41:20,985 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 311 selfloop transitions, 65 changer transitions 0/380 dead transitions. [2024-06-03 19:41:20,985 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 290 places, 380 transitions, 5067 flow [2024-06-03 19:41:20,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:41:20,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:41:20,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 138 transitions. [2024-06-03 19:41:20,986 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4011627906976744 [2024-06-03 19:41:20,986 INFO L175 Difference]: Start difference. First operand has 283 places, 363 transitions, 4021 flow. Second operand 8 states and 138 transitions. [2024-06-03 19:41:20,986 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 290 places, 380 transitions, 5067 flow [2024-06-03 19:41:21,703 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 285 places, 380 transitions, 4887 flow, removed 33 selfloop flow, removed 5 redundant places. [2024-06-03 19:41:21,707 INFO L231 Difference]: Finished difference. Result has 286 places, 366 transitions, 4033 flow [2024-06-03 19:41:21,708 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3858, PETRI_DIFFERENCE_MINUEND_PLACES=278, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=363, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=301, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4033, PETRI_PLACES=286, PETRI_TRANSITIONS=366} [2024-06-03 19:41:21,708 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 242 predicate places. [2024-06-03 19:41:21,708 INFO L495 AbstractCegarLoop]: Abstraction has has 286 places, 366 transitions, 4033 flow [2024-06-03 19:41:21,708 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) [2024-06-03 19:41:21,708 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:41:21,708 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:41:21,708 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2024-06-03 19:41:21,708 INFO L420 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:41:21,709 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:41:21,709 INFO L85 PathProgramCache]: Analyzing trace with hash -1293171560, now seen corresponding path program 4 times [2024-06-03 19:41:21,709 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:41:21,709 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [688453774] [2024-06-03 19:41:21,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:41:21,709 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:41:21,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:41:22,504 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:41:22,505 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:41:22,505 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [688453774] [2024-06-03 19:41:22,505 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [688453774] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:41:22,505 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:41:22,505 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:41:22,505 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [958669975] [2024-06-03 19:41:22,505 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:41:22,505 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:41:22,505 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:41:22,505 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:41:22,506 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:41:22,573 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-03 19:41:22,573 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 286 places, 366 transitions, 4033 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) [2024-06-03 19:41:22,573 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:41:22,573 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-03 19:41:22,573 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:41:23,907 INFO L124 PetriNetUnfolderBase]: 3703/5902 cut-off events. [2024-06-03 19:41:23,908 INFO L125 PetriNetUnfolderBase]: For 711029/711029 co-relation queries the response was YES. [2024-06-03 19:41:23,955 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49058 conditions, 5902 events. 3703/5902 cut-off events. For 711029/711029 co-relation queries the response was YES. Maximal size of possible extension queue 342. Compared 35536 event pairs, 815 based on Foata normal form. 2/5903 useless extension candidates. Maximal degree in co-relation 48927. Up to 5613 conditions per place. [2024-06-03 19:41:23,978 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 313 selfloop transitions, 63 changer transitions 0/380 dead transitions. [2024-06-03 19:41:23,978 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 293 places, 380 transitions, 4877 flow [2024-06-03 19:41:23,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:41:23,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:41:23,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 138 transitions. [2024-06-03 19:41:23,979 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4011627906976744 [2024-06-03 19:41:23,979 INFO L175 Difference]: Start difference. First operand has 286 places, 366 transitions, 4033 flow. Second operand 8 states and 138 transitions. [2024-06-03 19:41:23,979 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 293 places, 380 transitions, 4877 flow [2024-06-03 19:41:24,840 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 287 places, 380 transitions, 4693 flow, removed 27 selfloop flow, removed 6 redundant places. [2024-06-03 19:41:24,844 INFO L231 Difference]: Finished difference. Result has 288 places, 366 transitions, 3981 flow [2024-06-03 19:41:24,844 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3849, PETRI_DIFFERENCE_MINUEND_PLACES=280, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=366, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=303, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3981, PETRI_PLACES=288, PETRI_TRANSITIONS=366} [2024-06-03 19:41:24,845 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 244 predicate places. [2024-06-03 19:41:24,845 INFO L495 AbstractCegarLoop]: Abstraction has has 288 places, 366 transitions, 3981 flow [2024-06-03 19:41:24,845 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) [2024-06-03 19:41:24,845 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:41:24,845 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:41:24,845 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2024-06-03 19:41:24,845 INFO L420 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:41:24,846 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:41:24,846 INFO L85 PathProgramCache]: Analyzing trace with hash -731803740, now seen corresponding path program 1 times [2024-06-03 19:41:24,846 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:41:24,846 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1291487846] [2024-06-03 19:41:24,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:41:24,846 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:41:24,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:41:25,772 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:41:25,772 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:41:25,772 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1291487846] [2024-06-03 19:41:25,773 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1291487846] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:41:25,773 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:41:25,773 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:41:25,773 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [388946067] [2024-06-03 19:41:25,773 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:41:25,773 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:41:25,773 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:41:25,773 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:41:25,774 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:41:25,943 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-03 19:41:25,943 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 288 places, 366 transitions, 3981 flow. Second operand has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:41:25,943 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:41:25,943 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-03 19:41:25,943 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:41:27,190 INFO L124 PetriNetUnfolderBase]: 3487/5681 cut-off events. [2024-06-03 19:41:27,190 INFO L125 PetriNetUnfolderBase]: For 630506/630506 co-relation queries the response was YES. [2024-06-03 19:41:27,232 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45254 conditions, 5681 events. 3487/5681 cut-off events. For 630506/630506 co-relation queries the response was YES. Maximal size of possible extension queue 342. Compared 35445 event pairs, 824 based on Foata normal form. 1/5672 useless extension candidates. Maximal degree in co-relation 45123. Up to 5345 conditions per place. [2024-06-03 19:41:27,253 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 351 selfloop transitions, 24 changer transitions 0/393 dead transitions. [2024-06-03 19:41:27,253 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 296 places, 393 transitions, 5071 flow [2024-06-03 19:41:27,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:41:27,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:41:27,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 167 transitions. [2024-06-03 19:41:27,254 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4315245478036176 [2024-06-03 19:41:27,254 INFO L175 Difference]: Start difference. First operand has 288 places, 366 transitions, 3981 flow. Second operand 9 states and 167 transitions. [2024-06-03 19:41:27,254 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 296 places, 393 transitions, 5071 flow [2024-06-03 19:41:28,116 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 290 places, 393 transitions, 4928 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-06-03 19:41:28,120 INFO L231 Difference]: Finished difference. Result has 291 places, 372 transitions, 4006 flow [2024-06-03 19:41:28,120 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3838, PETRI_DIFFERENCE_MINUEND_PLACES=282, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=366, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=345, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4006, PETRI_PLACES=291, PETRI_TRANSITIONS=372} [2024-06-03 19:41:28,121 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 247 predicate places. [2024-06-03 19:41:28,121 INFO L495 AbstractCegarLoop]: Abstraction has has 291 places, 372 transitions, 4006 flow [2024-06-03 19:41:28,121 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:41:28,121 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:41:28,121 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:41:28,121 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2024-06-03 19:41:28,121 INFO L420 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:41:28,121 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:41:28,121 INFO L85 PathProgramCache]: Analyzing trace with hash -1502941698, now seen corresponding path program 2 times [2024-06-03 19:41:28,121 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:41:28,122 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1511215617] [2024-06-03 19:41:28,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:41:28,122 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:41:28,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:41:29,061 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:41:29,061 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:41:29,061 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1511215617] [2024-06-03 19:41:29,061 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1511215617] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:41:29,061 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:41:29,061 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:41:29,061 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1328370269] [2024-06-03 19:41:29,061 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:41:29,062 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:41:29,062 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:41:29,062 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:41:29,062 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:41:29,145 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-03 19:41:29,145 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 291 places, 372 transitions, 4006 flow. Second operand has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:41:29,145 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:41:29,145 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-03 19:41:29,145 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:41:30,343 INFO L124 PetriNetUnfolderBase]: 3484/5677 cut-off events. [2024-06-03 19:41:30,344 INFO L125 PetriNetUnfolderBase]: For 643035/643035 co-relation queries the response was YES. [2024-06-03 19:41:30,389 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45658 conditions, 5677 events. 3484/5677 cut-off events. For 643035/643035 co-relation queries the response was YES. Maximal size of possible extension queue 341. Compared 35431 event pairs, 824 based on Foata normal form. 1/5668 useless extension candidates. Maximal degree in co-relation 45526. Up to 5354 conditions per place. [2024-06-03 19:41:30,411 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 352 selfloop transitions, 18 changer transitions 0/388 dead transitions. [2024-06-03 19:41:30,411 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 298 places, 388 transitions, 4798 flow [2024-06-03 19:41:30,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:41:30,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:41:30,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 147 transitions. [2024-06-03 19:41:30,416 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4273255813953488 [2024-06-03 19:41:30,416 INFO L175 Difference]: Start difference. First operand has 291 places, 372 transitions, 4006 flow. Second operand 8 states and 147 transitions. [2024-06-03 19:41:30,416 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 298 places, 388 transitions, 4798 flow [2024-06-03 19:41:31,457 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 293 places, 388 transitions, 4691 flow, removed 44 selfloop flow, removed 5 redundant places. [2024-06-03 19:41:31,461 INFO L231 Difference]: Finished difference. Result has 294 places, 372 transitions, 3941 flow [2024-06-03 19:41:31,461 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3899, PETRI_DIFFERENCE_MINUEND_PLACES=286, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=372, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=354, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3941, PETRI_PLACES=294, PETRI_TRANSITIONS=372} [2024-06-03 19:41:31,461 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 250 predicate places. [2024-06-03 19:41:31,461 INFO L495 AbstractCegarLoop]: Abstraction has has 294 places, 372 transitions, 3941 flow [2024-06-03 19:41:31,461 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:41:31,462 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:41:31,462 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:41:31,462 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2024-06-03 19:41:31,462 INFO L420 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:41:31,462 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:41:31,462 INFO L85 PathProgramCache]: Analyzing trace with hash -1502941543, now seen corresponding path program 1 times [2024-06-03 19:41:31,462 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:41:31,462 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [822596104] [2024-06-03 19:41:31,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:41:31,462 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:41:31,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:41:32,289 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:41:32,289 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:41:32,289 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [822596104] [2024-06-03 19:41:32,289 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [822596104] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:41:32,289 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:41:32,289 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:41:32,289 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1815559741] [2024-06-03 19:41:32,289 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:41:32,290 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:41:32,290 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:41:32,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:41:32,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:41:32,364 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-03 19:41:32,364 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 294 places, 372 transitions, 3941 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) [2024-06-03 19:41:32,364 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:41:32,364 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-03 19:41:32,364 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:41:33,570 INFO L124 PetriNetUnfolderBase]: 3583/5780 cut-off events. [2024-06-03 19:41:33,570 INFO L125 PetriNetUnfolderBase]: For 656200/656200 co-relation queries the response was YES. [2024-06-03 19:41:33,619 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46463 conditions, 5780 events. 3583/5780 cut-off events. For 656200/656200 co-relation queries the response was YES. Maximal size of possible extension queue 342. Compared 35542 event pairs, 851 based on Foata normal form. 1/5773 useless extension candidates. Maximal degree in co-relation 46329. Up to 5551 conditions per place. [2024-06-03 19:41:33,642 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 363 selfloop transitions, 18 changer transitions 0/391 dead transitions. [2024-06-03 19:41:33,643 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 301 places, 391 transitions, 4815 flow [2024-06-03 19:41:33,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:41:33,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:41:33,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 140 transitions. [2024-06-03 19:41:33,643 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4069767441860465 [2024-06-03 19:41:33,643 INFO L175 Difference]: Start difference. First operand has 294 places, 372 transitions, 3941 flow. Second operand 8 states and 140 transitions. [2024-06-03 19:41:33,643 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 301 places, 391 transitions, 4815 flow [2024-06-03 19:41:34,640 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 294 places, 391 transitions, 4767 flow, removed 4 selfloop flow, removed 7 redundant places. [2024-06-03 19:41:34,644 INFO L231 Difference]: Finished difference. Result has 295 places, 375 transitions, 4001 flow [2024-06-03 19:41:34,644 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3893, PETRI_DIFFERENCE_MINUEND_PLACES=287, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=372, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=354, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4001, PETRI_PLACES=295, PETRI_TRANSITIONS=375} [2024-06-03 19:41:34,645 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 251 predicate places. [2024-06-03 19:41:34,645 INFO L495 AbstractCegarLoop]: Abstraction has has 295 places, 375 transitions, 4001 flow [2024-06-03 19:41:34,645 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) [2024-06-03 19:41:34,645 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:41:34,645 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:41:34,645 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2024-06-03 19:41:34,645 INFO L420 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:41:34,646 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:41:34,646 INFO L85 PathProgramCache]: Analyzing trace with hash -727988725, now seen corresponding path program 2 times [2024-06-03 19:41:34,646 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:41:34,646 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1011635719] [2024-06-03 19:41:34,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:41:34,646 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:41:34,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:41:35,449 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:41:35,450 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:41:35,450 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1011635719] [2024-06-03 19:41:35,450 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1011635719] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:41:35,450 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:41:35,450 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:41:35,450 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [203826390] [2024-06-03 19:41:35,450 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:41:35,450 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:41:35,450 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:41:35,450 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:41:35,451 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:41:35,516 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-03 19:41:35,516 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 295 places, 375 transitions, 4001 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) [2024-06-03 19:41:35,516 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:41:35,517 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-03 19:41:35,517 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:41:36,646 INFO L124 PetriNetUnfolderBase]: 3596/5798 cut-off events. [2024-06-03 19:41:36,647 INFO L125 PetriNetUnfolderBase]: For 674112/674112 co-relation queries the response was YES. [2024-06-03 19:41:36,697 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47152 conditions, 5798 events. 3596/5798 cut-off events. For 674112/674112 co-relation queries the response was YES. Maximal size of possible extension queue 344. Compared 35661 event pairs, 853 based on Foata normal form. 1/5791 useless extension candidates. Maximal degree in co-relation 47017. Up to 5527 conditions per place. [2024-06-03 19:41:36,720 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 344 selfloop transitions, 45 changer transitions 0/399 dead transitions. [2024-06-03 19:41:36,720 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 302 places, 399 transitions, 5361 flow [2024-06-03 19:41:36,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:41:36,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:41:36,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 146 transitions. [2024-06-03 19:41:36,721 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42441860465116277 [2024-06-03 19:41:36,721 INFO L175 Difference]: Start difference. First operand has 295 places, 375 transitions, 4001 flow. Second operand 8 states and 146 transitions. [2024-06-03 19:41:36,722 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 302 places, 399 transitions, 5361 flow [2024-06-03 19:41:37,577 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 296 places, 399 transitions, 5275 flow, removed 27 selfloop flow, removed 6 redundant places. [2024-06-03 19:41:37,581 INFO L231 Difference]: Finished difference. Result has 297 places, 384 transitions, 4215 flow [2024-06-03 19:41:37,582 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=3915, PETRI_DIFFERENCE_MINUEND_PLACES=289, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=375, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=336, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4215, PETRI_PLACES=297, PETRI_TRANSITIONS=384} [2024-06-03 19:41:37,582 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 253 predicate places. [2024-06-03 19:41:37,582 INFO L495 AbstractCegarLoop]: Abstraction has has 297 places, 384 transitions, 4215 flow [2024-06-03 19:41:37,582 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) [2024-06-03 19:41:37,582 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:41:37,582 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:41:37,582 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2024-06-03 19:41:37,583 INFO L420 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:41:37,583 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:41:37,583 INFO L85 PathProgramCache]: Analyzing trace with hash -1499216676, now seen corresponding path program 1 times [2024-06-03 19:41:37,583 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:41:37,583 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1623096202] [2024-06-03 19:41:37,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:41:37,583 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:41:37,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:41:38,400 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:41:38,401 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:41:38,401 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1623096202] [2024-06-03 19:41:38,401 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1623096202] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:41:38,401 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:41:38,401 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:41:38,401 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1112869884] [2024-06-03 19:41:38,401 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:41:38,401 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:41:38,401 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:41:38,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:41:38,401 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:41:38,469 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-03 19:41:38,470 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 297 places, 384 transitions, 4215 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) [2024-06-03 19:41:38,470 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:41:38,470 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-03 19:41:38,470 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:41:39,587 INFO L124 PetriNetUnfolderBase]: 3614/5825 cut-off events. [2024-06-03 19:41:39,587 INFO L125 PetriNetUnfolderBase]: For 698681/698681 co-relation queries the response was YES. [2024-06-03 19:41:39,639 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47886 conditions, 5825 events. 3614/5825 cut-off events. For 698681/698681 co-relation queries the response was YES. Maximal size of possible extension queue 346. Compared 35867 event pairs, 853 based on Foata normal form. 2/5819 useless extension candidates. Maximal degree in co-relation 47750. Up to 5564 conditions per place. [2024-06-03 19:41:39,662 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 364 selfloop transitions, 35 changer transitions 0/409 dead transitions. [2024-06-03 19:41:39,662 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 304 places, 409 transitions, 5353 flow [2024-06-03 19:41:39,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:41:39,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:41:39,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 146 transitions. [2024-06-03 19:41:39,663 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42441860465116277 [2024-06-03 19:41:39,663 INFO L175 Difference]: Start difference. First operand has 297 places, 384 transitions, 4215 flow. Second operand 8 states and 146 transitions. [2024-06-03 19:41:39,663 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 304 places, 409 transitions, 5353 flow [2024-06-03 19:41:40,566 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 301 places, 409 transitions, 5260 flow, removed 36 selfloop flow, removed 3 redundant places. [2024-06-03 19:41:40,571 INFO L231 Difference]: Finished difference. Result has 303 places, 393 transitions, 4345 flow [2024-06-03 19:41:40,571 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4122, PETRI_DIFFERENCE_MINUEND_PLACES=294, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=384, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=352, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4345, PETRI_PLACES=303, PETRI_TRANSITIONS=393} [2024-06-03 19:41:40,571 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 259 predicate places. [2024-06-03 19:41:40,571 INFO L495 AbstractCegarLoop]: Abstraction has has 303 places, 393 transitions, 4345 flow [2024-06-03 19:41:40,572 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) [2024-06-03 19:41:40,572 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:41:40,572 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:41:40,572 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2024-06-03 19:41:40,572 INFO L420 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:41:40,572 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:41:40,572 INFO L85 PathProgramCache]: Analyzing trace with hash -1499222628, now seen corresponding path program 3 times [2024-06-03 19:41:40,572 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:41:40,572 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [527432302] [2024-06-03 19:41:40,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:41:40,572 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:41:40,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:41:41,501 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:41:41,501 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:41:41,501 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [527432302] [2024-06-03 19:41:41,501 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [527432302] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:41:41,501 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:41:41,501 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:41:41,501 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [333232929] [2024-06-03 19:41:41,501 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:41:41,502 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:41:41,502 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:41:41,502 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:41:41,502 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:41:41,627 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-03 19:41:41,627 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 303 places, 393 transitions, 4345 flow. Second operand has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:41:41,627 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:41:41,627 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-03 19:41:41,628 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:41:42,744 INFO L124 PetriNetUnfolderBase]: 3534/5745 cut-off events. [2024-06-03 19:41:42,745 INFO L125 PetriNetUnfolderBase]: For 713377/713377 co-relation queries the response was YES. [2024-06-03 19:41:42,794 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48070 conditions, 5745 events. 3534/5745 cut-off events. For 713377/713377 co-relation queries the response was YES. Maximal size of possible extension queue 346. Compared 35828 event pairs, 823 based on Foata normal form. 1/5736 useless extension candidates. Maximal degree in co-relation 47931. Up to 5398 conditions per place. [2024-06-03 19:41:42,817 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 357 selfloop transitions, 30 changer transitions 0/409 dead transitions. [2024-06-03 19:41:42,817 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 310 places, 409 transitions, 5225 flow [2024-06-03 19:41:42,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:41:42,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:41:42,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 148 transitions. [2024-06-03 19:41:42,818 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43023255813953487 [2024-06-03 19:41:42,818 INFO L175 Difference]: Start difference. First operand has 303 places, 393 transitions, 4345 flow. Second operand 8 states and 148 transitions. [2024-06-03 19:41:42,818 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 310 places, 409 transitions, 5225 flow [2024-06-03 19:41:43,713 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 307 places, 409 transitions, 5151 flow, removed 32 selfloop flow, removed 3 redundant places. [2024-06-03 19:41:43,717 INFO L231 Difference]: Finished difference. Result has 308 places, 396 transitions, 4409 flow [2024-06-03 19:41:43,718 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4271, PETRI_DIFFERENCE_MINUEND_PLACES=300, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=393, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=363, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4409, PETRI_PLACES=308, PETRI_TRANSITIONS=396} [2024-06-03 19:41:43,718 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 264 predicate places. [2024-06-03 19:41:43,718 INFO L495 AbstractCegarLoop]: Abstraction has has 308 places, 396 transitions, 4409 flow [2024-06-03 19:41:43,718 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:41:43,718 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:41:43,718 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:41:43,718 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2024-06-03 19:41:43,718 INFO L420 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:41:43,718 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:41:43,719 INFO L85 PathProgramCache]: Analyzing trace with hash -1499222473, now seen corresponding path program 3 times [2024-06-03 19:41:43,719 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:41:43,719 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [232498773] [2024-06-03 19:41:43,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:41:43,719 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:41:43,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:41:44,521 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:41:44,521 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:41:44,521 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [232498773] [2024-06-03 19:41:44,521 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [232498773] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:41:44,521 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:41:44,521 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:41:44,522 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [94883578] [2024-06-03 19:41:44,522 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:41:44,522 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:41:44,522 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:41:44,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:41:44,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:41:44,613 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-03 19:41:44,613 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 308 places, 396 transitions, 4409 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) [2024-06-03 19:41:44,613 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:41:44,613 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-03 19:41:44,613 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:41:45,706 INFO L124 PetriNetUnfolderBase]: 3616/5828 cut-off events. [2024-06-03 19:41:45,706 INFO L125 PetriNetUnfolderBase]: For 723116/723116 co-relation queries the response was YES. [2024-06-03 19:41:45,757 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48985 conditions, 5828 events. 3616/5828 cut-off events. For 723116/723116 co-relation queries the response was YES. Maximal size of possible extension queue 347. Compared 35875 event pairs, 852 based on Foata normal form. 1/5821 useless extension candidates. Maximal degree in co-relation 48843. Up to 5556 conditions per place. [2024-06-03 19:41:45,781 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 356 selfloop transitions, 44 changer transitions 0/410 dead transitions. [2024-06-03 19:41:45,782 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 315 places, 410 transitions, 5427 flow [2024-06-03 19:41:45,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:41:45,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:41:45,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 146 transitions. [2024-06-03 19:41:45,782 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42441860465116277 [2024-06-03 19:41:45,782 INFO L175 Difference]: Start difference. First operand has 308 places, 396 transitions, 4409 flow. Second operand 8 states and 146 transitions. [2024-06-03 19:41:45,782 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 315 places, 410 transitions, 5427 flow [2024-06-03 19:41:47,052 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 309 places, 410 transitions, 5271 flow, removed 50 selfloop flow, removed 6 redundant places. [2024-06-03 19:41:47,056 INFO L231 Difference]: Finished difference. Result has 310 places, 396 transitions, 4347 flow [2024-06-03 19:41:47,057 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4253, PETRI_DIFFERENCE_MINUEND_PLACES=302, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=396, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=352, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4347, PETRI_PLACES=310, PETRI_TRANSITIONS=396} [2024-06-03 19:41:47,057 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 266 predicate places. [2024-06-03 19:41:47,057 INFO L495 AbstractCegarLoop]: Abstraction has has 310 places, 396 transitions, 4347 flow [2024-06-03 19:41:47,057 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) [2024-06-03 19:41:47,057 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:41:47,057 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:41:47,057 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2024-06-03 19:41:47,058 INFO L420 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:41:47,058 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:41:47,058 INFO L85 PathProgramCache]: Analyzing trace with hash -1291620162, now seen corresponding path program 4 times [2024-06-03 19:41:47,058 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:41:47,058 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [870739682] [2024-06-03 19:41:47,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:41:47,059 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:41:47,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:41:47,925 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:41:47,925 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:41:47,925 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [870739682] [2024-06-03 19:41:47,925 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [870739682] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:41:47,925 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:41:47,925 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:41:47,925 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [721681099] [2024-06-03 19:41:47,925 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:41:47,925 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:41:47,925 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:41:47,925 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:41:47,926 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:41:48,024 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-03 19:41:48,024 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 310 places, 396 transitions, 4347 flow. Second operand has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:41:48,024 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:41:48,024 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-03 19:41:48,024 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:41:49,234 INFO L124 PetriNetUnfolderBase]: 3528/5737 cut-off events. [2024-06-03 19:41:49,234 INFO L125 PetriNetUnfolderBase]: For 735647/735647 co-relation queries the response was YES. [2024-06-03 19:41:49,283 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48476 conditions, 5737 events. 3528/5737 cut-off events. For 735647/735647 co-relation queries the response was YES. Maximal size of possible extension queue 346. Compared 35742 event pairs, 822 based on Foata normal form. 1/5728 useless extension candidates. Maximal degree in co-relation 48333. Up to 5418 conditions per place. [2024-06-03 19:41:49,305 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 369 selfloop transitions, 18 changer transitions 0/409 dead transitions. [2024-06-03 19:41:49,305 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 317 places, 409 transitions, 5221 flow [2024-06-03 19:41:49,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:41:49,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:41:49,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 141 transitions. [2024-06-03 19:41:49,306 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40988372093023256 [2024-06-03 19:41:49,306 INFO L175 Difference]: Start difference. First operand has 310 places, 396 transitions, 4347 flow. Second operand 8 states and 141 transitions. [2024-06-03 19:41:49,306 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 317 places, 409 transitions, 5221 flow [2024-06-03 19:41:50,478 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 310 places, 409 transitions, 5115 flow, removed 5 selfloop flow, removed 7 redundant places. [2024-06-03 19:41:50,483 INFO L231 Difference]: Finished difference. Result has 311 places, 399 transitions, 4361 flow [2024-06-03 19:41:50,483 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4241, PETRI_DIFFERENCE_MINUEND_PLACES=303, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=396, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=378, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4361, PETRI_PLACES=311, PETRI_TRANSITIONS=399} [2024-06-03 19:41:50,483 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 267 predicate places. [2024-06-03 19:41:50,483 INFO L495 AbstractCegarLoop]: Abstraction has has 311 places, 399 transitions, 4361 flow [2024-06-03 19:41:50,483 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:41:50,484 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:41:50,484 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:41:50,484 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2024-06-03 19:41:50,484 INFO L420 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:41:50,484 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:41:50,484 INFO L85 PathProgramCache]: Analyzing trace with hash -295755419, now seen corresponding path program 4 times [2024-06-03 19:41:50,484 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:41:50,484 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1884310255] [2024-06-03 19:41:50,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:41:50,484 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:41:50,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:41:51,233 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:41:51,233 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:41:51,233 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1884310255] [2024-06-03 19:41:51,233 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1884310255] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:41:51,234 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:41:51,234 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:41:51,234 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2057639962] [2024-06-03 19:41:51,234 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:41:51,234 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:41:51,234 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:41:51,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:41:51,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:41:51,326 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-03 19:41:51,326 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 311 places, 399 transitions, 4361 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) [2024-06-03 19:41:51,326 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:41:51,326 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-03 19:41:51,326 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:41:52,678 INFO L124 PetriNetUnfolderBase]: 3618/5831 cut-off events. [2024-06-03 19:41:52,678 INFO L125 PetriNetUnfolderBase]: For 750488/750488 co-relation queries the response was YES. [2024-06-03 19:41:52,731 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49577 conditions, 5831 events. 3618/5831 cut-off events. For 750488/750488 co-relation queries the response was YES. Maximal size of possible extension queue 348. Compared 35902 event pairs, 850 based on Foata normal form. 1/5824 useless extension candidates. Maximal degree in co-relation 49433. Up to 5612 conditions per place. [2024-06-03 19:41:52,760 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 384 selfloop transitions, 18 changer transitions 0/412 dead transitions. [2024-06-03 19:41:52,760 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 318 places, 412 transitions, 5263 flow [2024-06-03 19:41:52,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:41:52,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:41:52,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 134 transitions. [2024-06-03 19:41:52,761 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38953488372093026 [2024-06-03 19:41:52,761 INFO L175 Difference]: Start difference. First operand has 311 places, 399 transitions, 4361 flow. Second operand 8 states and 134 transitions. [2024-06-03 19:41:52,761 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 318 places, 412 transitions, 5263 flow [2024-06-03 19:41:54,044 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 312 places, 412 transitions, 5165 flow, removed 33 selfloop flow, removed 6 redundant places. [2024-06-03 19:41:54,048 INFO L231 Difference]: Finished difference. Result has 313 places, 402 transitions, 4381 flow [2024-06-03 19:41:54,049 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4263, PETRI_DIFFERENCE_MINUEND_PLACES=305, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=399, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=381, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4381, PETRI_PLACES=313, PETRI_TRANSITIONS=402} [2024-06-03 19:41:54,049 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 269 predicate places. [2024-06-03 19:41:54,049 INFO L495 AbstractCegarLoop]: Abstraction has has 313 places, 402 transitions, 4381 flow [2024-06-03 19:41:54,049 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) [2024-06-03 19:41:54,049 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:41:54,049 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:41:54,049 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2024-06-03 19:41:54,049 INFO L420 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:41:54,049 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:41:54,049 INFO L85 PathProgramCache]: Analyzing trace with hash -1287457485, now seen corresponding path program 5 times [2024-06-03 19:41:54,049 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:41:54,050 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1550159228] [2024-06-03 19:41:54,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:41:54,050 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:41:54,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:41:54,825 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:41:54,825 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:41:54,825 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1550159228] [2024-06-03 19:41:54,825 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1550159228] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:41:54,825 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:41:54,825 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:41:54,825 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [664981972] [2024-06-03 19:41:54,825 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:41:54,826 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:41:54,826 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:41:54,826 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:41:54,826 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:41:54,903 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-03 19:41:54,915 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 313 places, 402 transitions, 4381 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) [2024-06-03 19:41:54,915 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:41:54,915 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-03 19:41:54,915 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:41:56,152 INFO L124 PetriNetUnfolderBase]: 3623/5838 cut-off events. [2024-06-03 19:41:56,152 INFO L125 PetriNetUnfolderBase]: For 765783/765783 co-relation queries the response was YES. [2024-06-03 19:41:56,203 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49781 conditions, 5838 events. 3623/5838 cut-off events. For 765783/765783 co-relation queries the response was YES. Maximal size of possible extension queue 349. Compared 35922 event pairs, 850 based on Foata normal form. 1/5831 useless extension candidates. Maximal degree in co-relation 49636. Up to 5603 conditions per place. [2024-06-03 19:41:56,227 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 375 selfloop transitions, 31 changer transitions 0/416 dead transitions. [2024-06-03 19:41:56,227 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 320 places, 416 transitions, 5481 flow [2024-06-03 19:41:56,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:41:56,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:41:56,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 138 transitions. [2024-06-03 19:41:56,227 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4011627906976744 [2024-06-03 19:41:56,227 INFO L175 Difference]: Start difference. First operand has 313 places, 402 transitions, 4381 flow. Second operand 8 states and 138 transitions. [2024-06-03 19:41:56,228 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 320 places, 416 transitions, 5481 flow [2024-06-03 19:41:57,391 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 314 places, 416 transitions, 5391 flow, removed 29 selfloop flow, removed 6 redundant places. [2024-06-03 19:41:57,395 INFO L231 Difference]: Finished difference. Result has 315 places, 405 transitions, 4435 flow [2024-06-03 19:41:57,396 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4291, PETRI_DIFFERENCE_MINUEND_PLACES=307, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=402, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=374, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4435, PETRI_PLACES=315, PETRI_TRANSITIONS=405} [2024-06-03 19:41:57,396 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 271 predicate places. [2024-06-03 19:41:57,396 INFO L495 AbstractCegarLoop]: Abstraction has has 315 places, 405 transitions, 4435 flow [2024-06-03 19:41:57,396 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) [2024-06-03 19:41:57,396 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:41:57,396 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:41:57,396 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2024-06-03 19:41:57,396 INFO L420 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:41:57,397 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:41:57,397 INFO L85 PathProgramCache]: Analyzing trace with hash -1287451905, now seen corresponding path program 6 times [2024-06-03 19:41:57,397 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:41:57,397 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [655188581] [2024-06-03 19:41:57,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:41:57,397 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:41:57,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:41:58,178 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:41:58,178 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:41:58,178 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [655188581] [2024-06-03 19:41:58,178 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [655188581] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:41:58,178 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:41:58,178 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:41:58,178 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2085129048] [2024-06-03 19:41:58,178 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:41:58,179 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:41:58,179 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:41:58,179 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:41:58,179 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:41:58,240 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-03 19:41:58,240 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 315 places, 405 transitions, 4435 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) [2024-06-03 19:41:58,240 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:41:58,240 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-03 19:41:58,240 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:41:59,530 INFO L124 PetriNetUnfolderBase]: 3620/5834 cut-off events. [2024-06-03 19:41:59,530 INFO L125 PetriNetUnfolderBase]: For 776538/776538 co-relation queries the response was YES. [2024-06-03 19:41:59,582 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49791 conditions, 5834 events. 3620/5834 cut-off events. For 776538/776538 co-relation queries the response was YES. Maximal size of possible extension queue 349. Compared 35911 event pairs, 850 based on Foata normal form. 1/5827 useless extension candidates. Maximal degree in co-relation 49645. Up to 5600 conditions per place. [2024-06-03 19:41:59,606 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 375 selfloop transitions, 30 changer transitions 0/415 dead transitions. [2024-06-03 19:41:59,606 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 322 places, 415 transitions, 5273 flow [2024-06-03 19:41:59,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:41:59,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:41:59,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 138 transitions. [2024-06-03 19:41:59,607 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4011627906976744 [2024-06-03 19:41:59,607 INFO L175 Difference]: Start difference. First operand has 315 places, 405 transitions, 4435 flow. Second operand 8 states and 138 transitions. [2024-06-03 19:41:59,607 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 322 places, 415 transitions, 5273 flow [2024-06-03 19:42:00,835 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 316 places, 415 transitions, 5085 flow, removed 59 selfloop flow, removed 6 redundant places. [2024-06-03 19:42:00,839 INFO L231 Difference]: Finished difference. Result has 317 places, 405 transitions, 4313 flow [2024-06-03 19:42:00,839 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4247, PETRI_DIFFERENCE_MINUEND_PLACES=309, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=405, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=375, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4313, PETRI_PLACES=317, PETRI_TRANSITIONS=405} [2024-06-03 19:42:00,840 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 273 predicate places. [2024-06-03 19:42:00,840 INFO L495 AbstractCegarLoop]: Abstraction has has 317 places, 405 transitions, 4313 flow [2024-06-03 19:42:00,840 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) [2024-06-03 19:42:00,840 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:42:00,840 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:42:00,840 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2024-06-03 19:42:00,840 INFO L420 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:42:00,840 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:42:00,840 INFO L85 PathProgramCache]: Analyzing trace with hash -1280100038, now seen corresponding path program 2 times [2024-06-03 19:42:00,840 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:42:00,840 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [501424111] [2024-06-03 19:42:00,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:42:00,841 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:42:00,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:42:01,596 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:42:01,596 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:42:01,596 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [501424111] [2024-06-03 19:42:01,596 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [501424111] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:42:01,596 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:42:01,596 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:42:01,597 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2000345870] [2024-06-03 19:42:01,597 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:42:01,597 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:42:01,597 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:42:01,597 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:42:01,597 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:42:01,676 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-03 19:42:01,676 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 317 places, 405 transitions, 4313 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) [2024-06-03 19:42:01,676 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:42:01,676 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-03 19:42:01,676 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:42:02,981 INFO L124 PetriNetUnfolderBase]: 3660/5893 cut-off events. [2024-06-03 19:42:02,981 INFO L125 PetriNetUnfolderBase]: For 810166/810166 co-relation queries the response was YES. [2024-06-03 19:42:03,030 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50599 conditions, 5893 events. 3660/5893 cut-off events. For 810166/810166 co-relation queries the response was YES. Maximal size of possible extension queue 353. Compared 36263 event pairs, 851 based on Foata normal form. 2/5887 useless extension candidates. Maximal degree in co-relation 50452. Up to 5651 conditions per place. [2024-06-03 19:42:03,053 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 389 selfloop transitions, 25 changer transitions 0/424 dead transitions. [2024-06-03 19:42:03,053 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 324 places, 424 transitions, 5461 flow [2024-06-03 19:42:03,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:42:03,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:42:03,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 139 transitions. [2024-06-03 19:42:03,054 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40406976744186046 [2024-06-03 19:42:03,054 INFO L175 Difference]: Start difference. First operand has 317 places, 405 transitions, 4313 flow. Second operand 8 states and 139 transitions. [2024-06-03 19:42:03,054 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 324 places, 424 transitions, 5461 flow [2024-06-03 19:42:04,603 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 317 places, 424 transitions, 5383 flow, removed 5 selfloop flow, removed 7 redundant places. [2024-06-03 19:42:04,620 INFO L231 Difference]: Finished difference. Result has 318 places, 411 transitions, 4393 flow [2024-06-03 19:42:04,621 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4235, PETRI_DIFFERENCE_MINUEND_PLACES=310, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=405, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=383, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4393, PETRI_PLACES=318, PETRI_TRANSITIONS=411} [2024-06-03 19:42:04,621 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 274 predicate places. [2024-06-03 19:42:04,621 INFO L495 AbstractCegarLoop]: Abstraction has has 318 places, 411 transitions, 4393 flow [2024-06-03 19:42:04,621 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) [2024-06-03 19:42:04,621 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:42:04,621 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:42:04,621 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2024-06-03 19:42:04,622 INFO L420 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:42:04,622 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:42:04,622 INFO L85 PathProgramCache]: Analyzing trace with hash -1287451688, now seen corresponding path program 3 times [2024-06-03 19:42:04,622 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:42:04,622 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1250872793] [2024-06-03 19:42:04,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:42:04,622 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:42:04,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:42:05,413 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:42:05,414 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:42:05,414 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1250872793] [2024-06-03 19:42:05,414 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1250872793] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:42:05,414 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:42:05,414 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:42:05,414 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1582372782] [2024-06-03 19:42:05,414 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:42:05,414 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:42:05,414 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:42:05,414 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:42:05,414 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:42:05,475 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-03 19:42:05,475 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 318 places, 411 transitions, 4393 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) [2024-06-03 19:42:05,475 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:42:05,475 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-03 19:42:05,475 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:42:06,779 INFO L124 PetriNetUnfolderBase]: 3640/5866 cut-off events. [2024-06-03 19:42:06,779 INFO L125 PetriNetUnfolderBase]: For 811826/811826 co-relation queries the response was YES. [2024-06-03 19:42:06,828 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50249 conditions, 5866 events. 3640/5866 cut-off events. For 811826/811826 co-relation queries the response was YES. Maximal size of possible extension queue 353. Compared 36172 event pairs, 850 based on Foata normal form. 2/5860 useless extension candidates. Maximal degree in co-relation 50101. Up to 5614 conditions per place. [2024-06-03 19:42:06,852 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 382 selfloop transitions, 32 changer transitions 0/424 dead transitions. [2024-06-03 19:42:06,852 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 325 places, 424 transitions, 5447 flow [2024-06-03 19:42:06,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:42:06,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:42:06,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 141 transitions. [2024-06-03 19:42:06,853 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40988372093023256 [2024-06-03 19:42:06,853 INFO L175 Difference]: Start difference. First operand has 318 places, 411 transitions, 4393 flow. Second operand 8 states and 141 transitions. [2024-06-03 19:42:06,853 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 325 places, 424 transitions, 5447 flow [2024-06-03 19:42:08,649 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 321 places, 424 transitions, 5377 flow, removed 23 selfloop flow, removed 4 redundant places. [2024-06-03 19:42:08,654 INFO L231 Difference]: Finished difference. Result has 322 places, 411 transitions, 4393 flow [2024-06-03 19:42:08,654 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4323, PETRI_DIFFERENCE_MINUEND_PLACES=314, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=411, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=379, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4393, PETRI_PLACES=322, PETRI_TRANSITIONS=411} [2024-06-03 19:42:08,654 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 278 predicate places. [2024-06-03 19:42:08,654 INFO L495 AbstractCegarLoop]: Abstraction has has 322 places, 411 transitions, 4393 flow [2024-06-03 19:42:08,654 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) [2024-06-03 19:42:08,655 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:42:08,655 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:42:08,655 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2024-06-03 19:42:08,655 INFO L420 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:42:08,655 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:42:08,655 INFO L85 PathProgramCache]: Analyzing trace with hash -1279833128, now seen corresponding path program 4 times [2024-06-03 19:42:08,655 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:42:08,655 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [130016466] [2024-06-03 19:42:08,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:42:08,655 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:42:08,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:42:09,379 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:42:09,379 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:42:09,379 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [130016466] [2024-06-03 19:42:09,379 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [130016466] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:42:09,379 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:42:09,379 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:42:09,379 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [914624828] [2024-06-03 19:42:09,379 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:42:09,379 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:42:09,379 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:42:09,380 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:42:09,380 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:42:09,456 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-03 19:42:09,457 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 322 places, 411 transitions, 4393 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) [2024-06-03 19:42:09,457 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:42:09,457 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-03 19:42:09,457 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:42:10,797 INFO L124 PetriNetUnfolderBase]: 3634/5858 cut-off events. [2024-06-03 19:42:10,797 INFO L125 PetriNetUnfolderBase]: For 817854/817854 co-relation queries the response was YES. [2024-06-03 19:42:10,847 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50162 conditions, 5858 events. 3634/5858 cut-off events. For 817854/817854 co-relation queries the response was YES. Maximal size of possible extension queue 353. Compared 36122 event pairs, 849 based on Foata normal form. 2/5852 useless extension candidates. Maximal degree in co-relation 50013. Up to 5630 conditions per place. [2024-06-03 19:42:10,870 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 392 selfloop transitions, 20 changer transitions 0/422 dead transitions. [2024-06-03 19:42:10,870 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 329 places, 422 transitions, 5249 flow [2024-06-03 19:42:10,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:42:10,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:42:10,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 135 transitions. [2024-06-03 19:42:10,871 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39244186046511625 [2024-06-03 19:42:10,871 INFO L175 Difference]: Start difference. First operand has 322 places, 411 transitions, 4393 flow. Second operand 8 states and 135 transitions. [2024-06-03 19:42:10,871 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 329 places, 422 transitions, 5249 flow [2024-06-03 19:42:12,463 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 321 places, 422 transitions, 5086 flow, removed 31 selfloop flow, removed 8 redundant places. [2024-06-03 19:42:12,468 INFO L231 Difference]: Finished difference. Result has 322 places, 411 transitions, 4277 flow [2024-06-03 19:42:12,468 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4230, PETRI_DIFFERENCE_MINUEND_PLACES=314, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=411, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=391, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4277, PETRI_PLACES=322, PETRI_TRANSITIONS=411} [2024-06-03 19:42:12,468 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 278 predicate places. [2024-06-03 19:42:12,468 INFO L495 AbstractCegarLoop]: Abstraction has has 322 places, 411 transitions, 4277 flow [2024-06-03 19:42:12,468 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) [2024-06-03 19:42:12,468 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:42:12,469 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:42:12,469 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2024-06-03 19:42:12,469 INFO L420 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:42:12,469 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:42:12,469 INFO L85 PathProgramCache]: Analyzing trace with hash 1873942628, now seen corresponding path program 1 times [2024-06-03 19:42:12,469 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:42:12,469 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1138754780] [2024-06-03 19:42:12,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:42:12,469 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:42:12,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:42:13,453 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:42:13,453 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:42:13,453 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1138754780] [2024-06-03 19:42:13,454 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1138754780] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:42:13,454 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:42:13,454 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:42:13,454 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1328518195] [2024-06-03 19:42:13,454 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:42:13,454 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:42:13,454 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:42:13,454 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:42:13,454 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:42:13,531 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-03 19:42:13,531 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 322 places, 411 transitions, 4277 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) [2024-06-03 19:42:13,531 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:42:13,531 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-03 19:42:13,531 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:42:14,811 INFO L124 PetriNetUnfolderBase]: 3702/5940 cut-off events. [2024-06-03 19:42:14,811 INFO L125 PetriNetUnfolderBase]: For 953814/953816 co-relation queries the response was YES. [2024-06-03 19:42:14,863 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53194 conditions, 5940 events. 3702/5940 cut-off events. For 953814/953816 co-relation queries the response was YES. Maximal size of possible extension queue 356. Compared 36385 event pairs, 806 based on Foata normal form. 3/5938 useless extension candidates. Maximal degree in co-relation 53045. Up to 5536 conditions per place. [2024-06-03 19:42:14,887 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 364 selfloop transitions, 59 changer transitions 0/441 dead transitions. [2024-06-03 19:42:14,887 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 329 places, 441 transitions, 5529 flow [2024-06-03 19:42:14,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:42:14,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:42:14,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 154 transitions. [2024-06-03 19:42:14,888 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4476744186046512 [2024-06-03 19:42:14,888 INFO L175 Difference]: Start difference. First operand has 322 places, 411 transitions, 4277 flow. Second operand 8 states and 154 transitions. [2024-06-03 19:42:14,888 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 329 places, 441 transitions, 5529 flow [2024-06-03 19:42:16,335 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 322 places, 441 transitions, 5477 flow, removed 3 selfloop flow, removed 7 redundant places. [2024-06-03 19:42:16,339 INFO L231 Difference]: Finished difference. Result has 323 places, 417 transitions, 4496 flow [2024-06-03 19:42:16,340 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4225, PETRI_DIFFERENCE_MINUEND_PLACES=315, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=411, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=355, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4496, PETRI_PLACES=323, PETRI_TRANSITIONS=417} [2024-06-03 19:42:16,340 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 279 predicate places. [2024-06-03 19:42:16,340 INFO L495 AbstractCegarLoop]: Abstraction has has 323 places, 417 transitions, 4496 flow [2024-06-03 19:42:16,340 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) [2024-06-03 19:42:16,340 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:42:16,340 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:42:16,340 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2024-06-03 19:42:16,340 INFO L420 AbstractCegarLoop]: === Iteration 98 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:42:16,340 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:42:16,340 INFO L85 PathProgramCache]: Analyzing trace with hash 1879656548, now seen corresponding path program 2 times [2024-06-03 19:42:16,341 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:42:16,341 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1584251819] [2024-06-03 19:42:16,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:42:16,341 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:42:16,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:42:17,370 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:42:17,370 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:42:17,370 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1584251819] [2024-06-03 19:42:17,370 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1584251819] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:42:17,370 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:42:17,370 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:42:17,370 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [378274865] [2024-06-03 19:42:17,370 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:42:17,370 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:42:17,370 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:42:17,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:42:17,371 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:42:17,460 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-03 19:42:17,460 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 323 places, 417 transitions, 4496 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) [2024-06-03 19:42:17,461 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:42:17,461 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-03 19:42:17,461 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:42:18,847 INFO L124 PetriNetUnfolderBase]: 3712/5950 cut-off events. [2024-06-03 19:42:18,847 INFO L125 PetriNetUnfolderBase]: For 977117/977119 co-relation queries the response was YES. [2024-06-03 19:42:18,904 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54047 conditions, 5950 events. 3712/5950 cut-off events. For 977117/977119 co-relation queries the response was YES. Maximal size of possible extension queue 354. Compared 36453 event pairs, 822 based on Foata normal form. 3/5944 useless extension candidates. Maximal degree in co-relation 53897. Up to 5607 conditions per place. [2024-06-03 19:42:18,930 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 373 selfloop transitions, 52 changer transitions 0/443 dead transitions. [2024-06-03 19:42:18,930 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 330 places, 443 transitions, 5518 flow [2024-06-03 19:42:18,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:42:18,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:42:18,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 149 transitions. [2024-06-03 19:42:18,931 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4331395348837209 [2024-06-03 19:42:18,931 INFO L175 Difference]: Start difference. First operand has 323 places, 417 transitions, 4496 flow. Second operand 8 states and 149 transitions. [2024-06-03 19:42:18,931 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 330 places, 443 transitions, 5518 flow [2024-06-03 19:42:21,073 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 327 places, 443 transitions, 5343 flow, removed 75 selfloop flow, removed 3 redundant places. [2024-06-03 19:42:21,077 INFO L231 Difference]: Finished difference. Result has 328 places, 423 transitions, 4545 flow [2024-06-03 19:42:21,078 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4363, PETRI_DIFFERENCE_MINUEND_PLACES=320, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=417, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=368, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4545, PETRI_PLACES=328, PETRI_TRANSITIONS=423} [2024-06-03 19:42:21,078 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 284 predicate places. [2024-06-03 19:42:21,078 INFO L495 AbstractCegarLoop]: Abstraction has has 328 places, 423 transitions, 4545 flow [2024-06-03 19:42:21,078 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) [2024-06-03 19:42:21,078 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:42:21,078 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:42:21,079 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97 [2024-06-03 19:42:21,079 INFO L420 AbstractCegarLoop]: === Iteration 99 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:42:21,079 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:42:21,079 INFO L85 PathProgramCache]: Analyzing trace with hash -53225352, now seen corresponding path program 1 times [2024-06-03 19:42:21,079 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:42:21,079 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [281666113] [2024-06-03 19:42:21,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:42:21,079 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:42:21,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:42:21,881 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:42:21,881 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:42:21,881 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [281666113] [2024-06-03 19:42:21,881 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [281666113] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:42:21,881 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:42:21,881 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:42:21,881 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1056784859] [2024-06-03 19:42:21,881 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:42:21,881 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:42:21,881 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:42:21,882 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:42:21,882 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:42:21,963 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-03 19:42:21,963 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 328 places, 423 transitions, 4545 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) [2024-06-03 19:42:21,963 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:42:21,963 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-03 19:42:21,963 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:42:23,341 INFO L124 PetriNetUnfolderBase]: 3722/5962 cut-off events. [2024-06-03 19:42:23,341 INFO L125 PetriNetUnfolderBase]: For 1001126/1001128 co-relation queries the response was YES. [2024-06-03 19:42:23,397 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54388 conditions, 5962 events. 3722/5962 cut-off events. For 1001126/1001128 co-relation queries the response was YES. Maximal size of possible extension queue 357. Compared 36472 event pairs, 828 based on Foata normal form. 4/5957 useless extension candidates. Maximal degree in co-relation 54236. Up to 5633 conditions per place. [2024-06-03 19:42:23,422 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 398 selfloop transitions, 32 changer transitions 0/448 dead transitions. [2024-06-03 19:42:23,422 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 335 places, 448 transitions, 5571 flow [2024-06-03 19:42:23,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:42:23,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:42:23,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 149 transitions. [2024-06-03 19:42:23,423 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4331395348837209 [2024-06-03 19:42:23,423 INFO L175 Difference]: Start difference. First operand has 328 places, 423 transitions, 4545 flow. Second operand 8 states and 149 transitions. [2024-06-03 19:42:23,423 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 335 places, 448 transitions, 5571 flow [2024-06-03 19:42:25,291 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 330 places, 448 transitions, 5459 flow, removed 12 selfloop flow, removed 5 redundant places. [2024-06-03 19:42:25,296 INFO L231 Difference]: Finished difference. Result has 331 places, 426 transitions, 4591 flow [2024-06-03 19:42:25,296 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4433, PETRI_DIFFERENCE_MINUEND_PLACES=323, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=423, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=391, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4591, PETRI_PLACES=331, PETRI_TRANSITIONS=426} [2024-06-03 19:42:25,296 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 287 predicate places. [2024-06-03 19:42:25,296 INFO L495 AbstractCegarLoop]: Abstraction has has 331 places, 426 transitions, 4591 flow [2024-06-03 19:42:25,296 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) [2024-06-03 19:42:25,296 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:42:25,296 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:42:25,296 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98 [2024-06-03 19:42:25,296 INFO L420 AbstractCegarLoop]: === Iteration 100 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:42:25,297 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:42:25,297 INFO L85 PathProgramCache]: Analyzing trace with hash 1989532700, now seen corresponding path program 1 times [2024-06-03 19:42:25,297 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:42:25,297 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1235118224] [2024-06-03 19:42:25,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:42:25,297 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:42:25,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:42:26,081 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:42:26,082 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:42:26,082 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1235118224] [2024-06-03 19:42:26,082 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1235118224] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:42:26,082 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:42:26,082 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:42:26,082 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [124991537] [2024-06-03 19:42:26,082 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:42:26,082 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:42:26,082 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:42:26,082 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:42:26,082 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:42:26,154 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-03 19:42:26,154 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 331 places, 426 transitions, 4591 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) [2024-06-03 19:42:26,154 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:42:26,154 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-03 19:42:26,154 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:42:27,519 INFO L124 PetriNetUnfolderBase]: 3832/6086 cut-off events. [2024-06-03 19:42:27,519 INFO L125 PetriNetUnfolderBase]: For 1030400/1030402 co-relation queries the response was YES. [2024-06-03 19:42:27,578 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56002 conditions, 6086 events. 3832/6086 cut-off events. For 1030400/1030402 co-relation queries the response was YES. Maximal size of possible extension queue 362. Compared 36883 event pairs, 856 based on Foata normal form. 4/6089 useless extension candidates. Maximal degree in co-relation 55849. Up to 5823 conditions per place. [2024-06-03 19:42:27,605 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 411 selfloop transitions, 46 changer transitions 0/461 dead transitions. [2024-06-03 19:42:27,605 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 338 places, 461 transitions, 6004 flow [2024-06-03 19:42:27,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:42:27,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:42:27,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 146 transitions. [2024-06-03 19:42:27,607 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42441860465116277 [2024-06-03 19:42:27,608 INFO L175 Difference]: Start difference. First operand has 331 places, 426 transitions, 4591 flow. Second operand 8 states and 146 transitions. [2024-06-03 19:42:27,608 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 338 places, 461 transitions, 6004 flow [2024-06-03 19:42:29,582 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 332 places, 461 transitions, 5872 flow, removed 37 selfloop flow, removed 6 redundant places. [2024-06-03 19:42:29,587 INFO L231 Difference]: Finished difference. Result has 334 places, 439 transitions, 4792 flow [2024-06-03 19:42:29,587 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4459, PETRI_DIFFERENCE_MINUEND_PLACES=325, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=426, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=383, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4792, PETRI_PLACES=334, PETRI_TRANSITIONS=439} [2024-06-03 19:42:29,588 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 290 predicate places. [2024-06-03 19:42:29,588 INFO L495 AbstractCegarLoop]: Abstraction has has 334 places, 439 transitions, 4792 flow [2024-06-03 19:42:29,588 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) [2024-06-03 19:42:29,588 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:42:29,588 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:42:29,588 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99 [2024-06-03 19:42:29,588 INFO L420 AbstractCegarLoop]: === Iteration 101 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:42:29,588 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:42:29,589 INFO L85 PathProgramCache]: Analyzing trace with hash 1989532514, now seen corresponding path program 2 times [2024-06-03 19:42:29,589 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:42:29,589 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1698314494] [2024-06-03 19:42:29,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:42:29,589 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:42:29,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:42:30,375 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:42:30,375 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:42:30,375 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1698314494] [2024-06-03 19:42:30,375 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1698314494] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:42:30,375 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:42:30,376 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:42:30,376 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [790653360] [2024-06-03 19:42:30,376 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:42:30,376 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:42:30,376 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:42:30,376 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:42:30,376 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:42:30,449 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-03 19:42:30,449 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 334 places, 439 transitions, 4792 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) [2024-06-03 19:42:30,449 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:42:30,449 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-03 19:42:30,450 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:42:31,828 INFO L124 PetriNetUnfolderBase]: 3778/6046 cut-off events. [2024-06-03 19:42:31,828 INFO L125 PetriNetUnfolderBase]: For 1068824/1068826 co-relation queries the response was YES. [2024-06-03 19:42:31,888 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56934 conditions, 6046 events. 3778/6046 cut-off events. For 1068824/1068826 co-relation queries the response was YES. Maximal size of possible extension queue 367. Compared 37059 event pairs, 832 based on Foata normal form. 4/6049 useless extension candidates. Maximal degree in co-relation 56779. Up to 5645 conditions per place. [2024-06-03 19:42:31,915 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 396 selfloop transitions, 48 changer transitions 0/467 dead transitions. [2024-06-03 19:42:31,915 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 341 places, 467 transitions, 6170 flow [2024-06-03 19:42:31,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:42:31,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:42:31,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 152 transitions. [2024-06-03 19:42:31,915 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4418604651162791 [2024-06-03 19:42:31,916 INFO L175 Difference]: Start difference. First operand has 334 places, 439 transitions, 4792 flow. Second operand 8 states and 152 transitions. [2024-06-03 19:42:31,916 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 341 places, 467 transitions, 6170 flow [2024-06-03 19:42:33,764 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 338 places, 467 transitions, 6044 flow, removed 55 selfloop flow, removed 3 redundant places. [2024-06-03 19:42:33,769 INFO L231 Difference]: Finished difference. Result has 339 places, 445 transitions, 4956 flow [2024-06-03 19:42:33,769 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4672, PETRI_DIFFERENCE_MINUEND_PLACES=331, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=439, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=394, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4956, PETRI_PLACES=339, PETRI_TRANSITIONS=445} [2024-06-03 19:42:33,770 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 295 predicate places. [2024-06-03 19:42:33,770 INFO L495 AbstractCegarLoop]: Abstraction has has 339 places, 445 transitions, 4956 flow [2024-06-03 19:42:33,770 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) [2024-06-03 19:42:33,770 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:42:33,770 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:42:33,770 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100 [2024-06-03 19:42:33,770 INFO L420 AbstractCegarLoop]: === Iteration 102 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:42:33,770 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:42:33,771 INFO L85 PathProgramCache]: Analyzing trace with hash -2128065926, now seen corresponding path program 2 times [2024-06-03 19:42:33,771 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:42:33,771 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1996640691] [2024-06-03 19:42:33,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:42:33,771 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:42:33,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:42:34,491 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:42:34,491 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:42:34,491 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1996640691] [2024-06-03 19:42:34,491 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1996640691] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:42:34,491 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:42:34,491 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:42:34,492 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [625149011] [2024-06-03 19:42:34,492 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:42:34,492 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:42:34,492 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:42:34,492 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:42:34,492 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:42:34,584 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-03 19:42:34,591 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 339 places, 445 transitions, 4956 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) [2024-06-03 19:42:34,591 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:42:34,591 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-03 19:42:34,591 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:42:36,061 INFO L124 PetriNetUnfolderBase]: 3868/6138 cut-off events. [2024-06-03 19:42:36,061 INFO L125 PetriNetUnfolderBase]: For 1090451/1090453 co-relation queries the response was YES. [2024-06-03 19:42:36,127 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57915 conditions, 6138 events. 3868/6138 cut-off events. For 1090451/1090453 co-relation queries the response was YES. Maximal size of possible extension queue 369. Compared 37193 event pairs, 861 based on Foata normal form. 4/6141 useless extension candidates. Maximal degree in co-relation 57758. Up to 5942 conditions per place. [2024-06-03 19:42:36,156 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 425 selfloop transitions, 36 changer transitions 0/465 dead transitions. [2024-06-03 19:42:36,156 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 346 places, 465 transitions, 5989 flow [2024-06-03 19:42:36,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:42:36,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:42:36,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 138 transitions. [2024-06-03 19:42:36,157 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4011627906976744 [2024-06-03 19:42:36,157 INFO L175 Difference]: Start difference. First operand has 339 places, 445 transitions, 4956 flow. Second operand 8 states and 138 transitions. [2024-06-03 19:42:36,157 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 346 places, 465 transitions, 5989 flow [2024-06-03 19:42:38,286 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 342 places, 465 transitions, 5849 flow, removed 52 selfloop flow, removed 4 redundant places. [2024-06-03 19:42:38,291 INFO L231 Difference]: Finished difference. Result has 343 places, 449 transitions, 4949 flow [2024-06-03 19:42:38,291 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4816, PETRI_DIFFERENCE_MINUEND_PLACES=335, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=445, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=410, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4949, PETRI_PLACES=343, PETRI_TRANSITIONS=449} [2024-06-03 19:42:38,291 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 299 predicate places. [2024-06-03 19:42:38,291 INFO L495 AbstractCegarLoop]: Abstraction has has 343 places, 449 transitions, 4949 flow [2024-06-03 19:42:38,291 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) [2024-06-03 19:42:38,291 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:42:38,291 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:42:38,291 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101 [2024-06-03 19:42:38,291 INFO L420 AbstractCegarLoop]: === Iteration 103 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:42:38,292 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:42:38,292 INFO L85 PathProgramCache]: Analyzing trace with hash -2128303076, now seen corresponding path program 3 times [2024-06-03 19:42:38,292 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:42:38,292 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1528686026] [2024-06-03 19:42:38,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:42:38,292 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:42:38,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:42:39,040 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:42:39,040 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:42:39,040 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1528686026] [2024-06-03 19:42:39,040 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1528686026] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:42:39,040 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:42:39,040 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:42:39,041 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1187082144] [2024-06-03 19:42:39,041 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:42:39,041 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:42:39,041 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:42:39,041 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:42:39,041 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:42:39,118 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-03 19:42:39,118 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 343 places, 449 transitions, 4949 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) [2024-06-03 19:42:39,118 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:42:39,118 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-03 19:42:39,118 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:42:40,493 INFO L124 PetriNetUnfolderBase]: 3878/6156 cut-off events. [2024-06-03 19:42:40,494 INFO L125 PetriNetUnfolderBase]: For 1109040/1109042 co-relation queries the response was YES. [2024-06-03 19:42:40,557 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58128 conditions, 6156 events. 3878/6156 cut-off events. For 1109040/1109042 co-relation queries the response was YES. Maximal size of possible extension queue 371. Compared 37319 event pairs, 857 based on Foata normal form. 4/6159 useless extension candidates. Maximal degree in co-relation 57969. Up to 5942 conditions per place. [2024-06-03 19:42:40,584 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 424 selfloop transitions, 41 changer transitions 0/469 dead transitions. [2024-06-03 19:42:40,584 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 350 places, 469 transitions, 6003 flow [2024-06-03 19:42:40,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:42:40,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:42:40,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 141 transitions. [2024-06-03 19:42:40,585 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40988372093023256 [2024-06-03 19:42:40,585 INFO L175 Difference]: Start difference. First operand has 343 places, 449 transitions, 4949 flow. Second operand 8 states and 141 transitions. [2024-06-03 19:42:40,585 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 350 places, 469 transitions, 6003 flow [2024-06-03 19:42:42,197 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 345 places, 469 transitions, 5905 flow, removed 16 selfloop flow, removed 5 redundant places. [2024-06-03 19:42:42,202 INFO L231 Difference]: Finished difference. Result has 346 places, 452 transitions, 4991 flow [2024-06-03 19:42:42,202 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4851, PETRI_DIFFERENCE_MINUEND_PLACES=338, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=449, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=408, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4991, PETRI_PLACES=346, PETRI_TRANSITIONS=452} [2024-06-03 19:42:42,202 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 302 predicate places. [2024-06-03 19:42:42,202 INFO L495 AbstractCegarLoop]: Abstraction has has 346 places, 452 transitions, 4991 flow [2024-06-03 19:42:42,202 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) [2024-06-03 19:42:42,202 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:42:42,202 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:42:42,203 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102 [2024-06-03 19:42:42,203 INFO L420 AbstractCegarLoop]: === Iteration 104 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:42:42,203 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:42:42,203 INFO L85 PathProgramCache]: Analyzing trace with hash -2128303262, now seen corresponding path program 3 times [2024-06-03 19:42:42,203 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:42:42,203 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1810645068] [2024-06-03 19:42:42,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:42:42,203 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:42:42,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:42:42,958 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:42:42,959 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:42:42,959 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1810645068] [2024-06-03 19:42:42,959 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1810645068] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:42:42,959 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:42:42,959 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:42:42,959 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [184085495] [2024-06-03 19:42:42,959 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:42:42,959 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:42:42,959 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:42:42,959 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:42:42,959 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:42:43,041 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-03 19:42:43,041 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 346 places, 452 transitions, 4991 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) [2024-06-03 19:42:43,041 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:42:43,041 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-03 19:42:43,041 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:42:44,463 INFO L124 PetriNetUnfolderBase]: 3806/6086 cut-off events. [2024-06-03 19:42:44,464 INFO L125 PetriNetUnfolderBase]: For 1132888/1132890 co-relation queries the response was YES. [2024-06-03 19:42:44,528 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58006 conditions, 6086 events. 3806/6086 cut-off events. For 1132888/1132890 co-relation queries the response was YES. Maximal size of possible extension queue 375. Compared 37337 event pairs, 834 based on Foata normal form. 4/6089 useless extension candidates. Maximal degree in co-relation 57846. Up to 5771 conditions per place. [2024-06-03 19:42:44,555 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 417 selfloop transitions, 30 changer transitions 0/472 dead transitions. [2024-06-03 19:42:44,556 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 353 places, 472 transitions, 6035 flow [2024-06-03 19:42:44,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:42:44,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:42:44,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 144 transitions. [2024-06-03 19:42:44,556 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4186046511627907 [2024-06-03 19:42:44,556 INFO L175 Difference]: Start difference. First operand has 346 places, 452 transitions, 4991 flow. Second operand 8 states and 144 transitions. [2024-06-03 19:42:44,556 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 353 places, 472 transitions, 6035 flow [2024-06-03 19:42:45,939 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 347 places, 472 transitions, 5923 flow, removed 17 selfloop flow, removed 6 redundant places. [2024-06-03 19:42:45,952 INFO L231 Difference]: Finished difference. Result has 348 places, 455 transitions, 5023 flow [2024-06-03 19:42:45,952 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4879, PETRI_DIFFERENCE_MINUEND_PLACES=340, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=452, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=422, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5023, PETRI_PLACES=348, PETRI_TRANSITIONS=455} [2024-06-03 19:42:45,953 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 304 predicate places. [2024-06-03 19:42:45,953 INFO L495 AbstractCegarLoop]: Abstraction has has 348 places, 455 transitions, 5023 flow [2024-06-03 19:42:45,953 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) [2024-06-03 19:42:45,953 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:42:45,953 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:42:45,953 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103 [2024-06-03 19:42:45,953 INFO L420 AbstractCegarLoop]: === Iteration 105 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:42:45,954 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:42:45,954 INFO L85 PathProgramCache]: Analyzing trace with hash 403122396, now seen corresponding path program 3 times [2024-06-03 19:42:45,954 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:42:45,954 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1351345922] [2024-06-03 19:42:45,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:42:45,954 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:42:45,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:42:46,867 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:42:46,868 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:42:46,868 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1351345922] [2024-06-03 19:42:46,868 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1351345922] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:42:46,868 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:42:46,868 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:42:46,868 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [180947018] [2024-06-03 19:42:46,868 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:42:46,868 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:42:46,868 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:42:46,868 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:42:46,868 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:42:46,964 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-03 19:42:46,964 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 348 places, 455 transitions, 5023 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) [2024-06-03 19:42:46,964 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:42:46,964 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-03 19:42:46,964 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:42:48,372 INFO L124 PetriNetUnfolderBase]: 3812/6092 cut-off events. [2024-06-03 19:42:48,372 INFO L125 PetriNetUnfolderBase]: For 1147163/1147163 co-relation queries the response was YES. [2024-06-03 19:42:48,434 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58211 conditions, 6092 events. 3812/6092 cut-off events. For 1147163/1147163 co-relation queries the response was YES. Maximal size of possible extension queue 376. Compared 37380 event pairs, 778 based on Foata normal form. 1/6092 useless extension candidates. Maximal degree in co-relation 58050. Up to 5731 conditions per place. [2024-06-03 19:42:48,460 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 398 selfloop transitions, 50 changer transitions 0/473 dead transitions. [2024-06-03 19:42:48,460 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 355 places, 473 transitions, 6007 flow [2024-06-03 19:42:48,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:42:48,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:42:48,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 144 transitions. [2024-06-03 19:42:48,460 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4186046511627907 [2024-06-03 19:42:48,460 INFO L175 Difference]: Start difference. First operand has 348 places, 455 transitions, 5023 flow. Second operand 8 states and 144 transitions. [2024-06-03 19:42:48,460 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 355 places, 473 transitions, 6007 flow [2024-06-03 19:42:50,302 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 349 places, 473 transitions, 5891 flow, removed 30 selfloop flow, removed 6 redundant places. [2024-06-03 19:42:50,307 INFO L231 Difference]: Finished difference. Result has 350 places, 458 transitions, 5061 flow [2024-06-03 19:42:50,307 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4907, PETRI_DIFFERENCE_MINUEND_PLACES=342, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=455, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=405, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5061, PETRI_PLACES=350, PETRI_TRANSITIONS=458} [2024-06-03 19:42:50,308 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 306 predicate places. [2024-06-03 19:42:50,308 INFO L495 AbstractCegarLoop]: Abstraction has has 350 places, 458 transitions, 5061 flow [2024-06-03 19:42:50,308 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) [2024-06-03 19:42:50,308 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:42:50,308 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:42:50,308 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104 [2024-06-03 19:42:50,308 INFO L420 AbstractCegarLoop]: === Iteration 106 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:42:50,308 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:42:50,308 INFO L85 PathProgramCache]: Analyzing trace with hash 1871082692, now seen corresponding path program 1 times [2024-06-03 19:42:50,308 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:42:50,308 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1318683415] [2024-06-03 19:42:50,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:42:50,308 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:42:50,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:42:51,469 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:42:51,469 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:42:51,469 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1318683415] [2024-06-03 19:42:51,469 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1318683415] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:42:51,469 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:42:51,469 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:42:51,470 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [686391004] [2024-06-03 19:42:51,470 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:42:51,470 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:42:51,470 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:42:51,470 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:42:51,470 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:42:51,552 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-03 19:42:51,553 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 350 places, 458 transitions, 5061 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) [2024-06-03 19:42:51,553 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:42:51,553 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-03 19:42:51,553 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:42:53,027 INFO L124 PetriNetUnfolderBase]: 3820/6110 cut-off events. [2024-06-03 19:42:53,027 INFO L125 PetriNetUnfolderBase]: For 1174252/1174254 co-relation queries the response was YES. [2024-06-03 19:42:53,093 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58492 conditions, 6110 events. 3820/6110 cut-off events. For 1174252/1174254 co-relation queries the response was YES. Maximal size of possible extension queue 378. Compared 37403 event pairs, 688 based on Foata normal form. 4/6113 useless extension candidates. Maximal degree in co-relation 58330. Up to 5674 conditions per place. [2024-06-03 19:42:53,121 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 414 selfloop transitions, 49 changer transitions 0/488 dead transitions. [2024-06-03 19:42:53,121 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 357 places, 488 transitions, 6371 flow [2024-06-03 19:42:53,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:42:53,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:42:53,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 154 transitions. [2024-06-03 19:42:53,122 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4476744186046512 [2024-06-03 19:42:53,122 INFO L175 Difference]: Start difference. First operand has 350 places, 458 transitions, 5061 flow. Second operand 8 states and 154 transitions. [2024-06-03 19:42:53,122 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 357 places, 488 transitions, 6371 flow [2024-06-03 19:42:55,167 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 351 places, 488 transitions, 6232 flow, removed 15 selfloop flow, removed 6 redundant places. [2024-06-03 19:42:55,172 INFO L231 Difference]: Finished difference. Result has 352 places, 462 transitions, 5121 flow [2024-06-03 19:42:55,172 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=4922, PETRI_DIFFERENCE_MINUEND_PLACES=344, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=458, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=411, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5121, PETRI_PLACES=352, PETRI_TRANSITIONS=462} [2024-06-03 19:42:55,172 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 308 predicate places. [2024-06-03 19:42:55,172 INFO L495 AbstractCegarLoop]: Abstraction has has 352 places, 462 transitions, 5121 flow [2024-06-03 19:42:55,173 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) [2024-06-03 19:42:55,173 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:42:55,173 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:42:55,173 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105 [2024-06-03 19:42:55,173 INFO L420 AbstractCegarLoop]: === Iteration 107 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:42:55,173 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:42:55,173 INFO L85 PathProgramCache]: Analyzing trace with hash 393173070, now seen corresponding path program 2 times [2024-06-03 19:42:55,173 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:42:55,173 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1442143024] [2024-06-03 19:42:55,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:42:55,174 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:42:55,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:42:56,387 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:42:56,387 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:42:56,387 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1442143024] [2024-06-03 19:42:56,387 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1442143024] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:42:56,387 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:42:56,387 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:42:56,388 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [397965261] [2024-06-03 19:42:56,388 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:42:56,388 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:42:56,388 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:42:56,388 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:42:56,388 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:42:56,466 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-03 19:42:56,467 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 352 places, 462 transitions, 5121 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) [2024-06-03 19:42:56,467 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:42:56,467 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-03 19:42:56,467 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:42:58,038 INFO L124 PetriNetUnfolderBase]: 3827/6119 cut-off events. [2024-06-03 19:42:58,038 INFO L125 PetriNetUnfolderBase]: For 1195535/1195537 co-relation queries the response was YES. [2024-06-03 19:42:58,098 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58919 conditions, 6119 events. 3827/6119 cut-off events. For 1195535/1195537 co-relation queries the response was YES. Maximal size of possible extension queue 380. Compared 37565 event pairs, 826 based on Foata normal form. 4/6122 useless extension candidates. Maximal degree in co-relation 58756. Up to 5751 conditions per place. [2024-06-03 19:42:58,123 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 409 selfloop transitions, 51 changer transitions 0/485 dead transitions. [2024-06-03 19:42:58,123 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 359 places, 485 transitions, 6157 flow [2024-06-03 19:42:58,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:42:58,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:42:58,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 149 transitions. [2024-06-03 19:42:58,124 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4331395348837209 [2024-06-03 19:42:58,124 INFO L175 Difference]: Start difference. First operand has 352 places, 462 transitions, 5121 flow. Second operand 8 states and 149 transitions. [2024-06-03 19:42:58,124 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 359 places, 485 transitions, 6157 flow [2024-06-03 19:43:00,000 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 355 places, 485 transitions, 6022 flow, removed 41 selfloop flow, removed 4 redundant places. [2024-06-03 19:43:00,005 INFO L231 Difference]: Finished difference. Result has 356 places, 464 transitions, 5147 flow [2024-06-03 19:43:00,005 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5006, PETRI_DIFFERENCE_MINUEND_PLACES=348, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=462, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=411, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5147, PETRI_PLACES=356, PETRI_TRANSITIONS=464} [2024-06-03 19:43:00,006 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 312 predicate places. [2024-06-03 19:43:00,006 INFO L495 AbstractCegarLoop]: Abstraction has has 356 places, 464 transitions, 5147 flow [2024-06-03 19:43:00,006 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) [2024-06-03 19:43:00,006 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:43:00,006 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:43:00,006 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106 [2024-06-03 19:43:00,006 INFO L420 AbstractCegarLoop]: === Iteration 108 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:43:00,006 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:43:00,006 INFO L85 PathProgramCache]: Analyzing trace with hash -2128426394, now seen corresponding path program 3 times [2024-06-03 19:43:00,006 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:43:00,006 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2085813701] [2024-06-03 19:43:00,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:43:00,007 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:43:00,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:43:01,015 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:43:01,016 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:43:01,016 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2085813701] [2024-06-03 19:43:01,016 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2085813701] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:43:01,016 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:43:01,016 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:43:01,016 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [580522907] [2024-06-03 19:43:01,016 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:43:01,016 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:43:01,016 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:43:01,017 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:43:01,017 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:43:01,140 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-03 19:43:01,141 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 356 places, 464 transitions, 5147 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) [2024-06-03 19:43:01,141 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:43:01,141 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-03 19:43:01,141 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:43:02,635 INFO L124 PetriNetUnfolderBase]: 3838/6128 cut-off events. [2024-06-03 19:43:02,636 INFO L125 PetriNetUnfolderBase]: For 1217024/1217024 co-relation queries the response was YES. [2024-06-03 19:43:02,700 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59165 conditions, 6128 events. 3838/6128 cut-off events. For 1217024/1217024 co-relation queries the response was YES. Maximal size of possible extension queue 382. Compared 37530 event pairs, 778 based on Foata normal form. 2/6129 useless extension candidates. Maximal degree in co-relation 59000. Up to 5764 conditions per place. [2024-06-03 19:43:02,726 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 408 selfloop transitions, 49 changer transitions 0/482 dead transitions. [2024-06-03 19:43:02,727 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 363 places, 482 transitions, 6143 flow [2024-06-03 19:43:02,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:43:02,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:43:02,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 144 transitions. [2024-06-03 19:43:02,727 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4186046511627907 [2024-06-03 19:43:02,727 INFO L175 Difference]: Start difference. First operand has 356 places, 464 transitions, 5147 flow. Second operand 8 states and 144 transitions. [2024-06-03 19:43:02,728 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 363 places, 482 transitions, 6143 flow [2024-06-03 19:43:04,856 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 357 places, 482 transitions, 6022 flow, removed 11 selfloop flow, removed 6 redundant places. [2024-06-03 19:43:04,861 INFO L231 Difference]: Finished difference. Result has 358 places, 466 transitions, 5167 flow [2024-06-03 19:43:04,861 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5026, PETRI_DIFFERENCE_MINUEND_PLACES=350, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=464, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=415, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5167, PETRI_PLACES=358, PETRI_TRANSITIONS=466} [2024-06-03 19:43:04,861 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 314 predicate places. [2024-06-03 19:43:04,861 INFO L495 AbstractCegarLoop]: Abstraction has has 358 places, 466 transitions, 5167 flow [2024-06-03 19:43:04,861 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) [2024-06-03 19:43:04,862 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:43:04,862 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:43:04,862 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107 [2024-06-03 19:43:04,862 INFO L420 AbstractCegarLoop]: === Iteration 109 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:43:04,862 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:43:04,862 INFO L85 PathProgramCache]: Analyzing trace with hash -2128056998, now seen corresponding path program 1 times [2024-06-03 19:43:04,862 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:43:04,862 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [565698961] [2024-06-03 19:43:04,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:43:04,862 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:43:04,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:43:05,731 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:43:05,732 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:43:05,732 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [565698961] [2024-06-03 19:43:05,732 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [565698961] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:43:05,732 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:43:05,732 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:43:05,732 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2109014256] [2024-06-03 19:43:05,732 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:43:05,732 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:43:05,732 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:43:05,732 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:43:05,732 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:43:05,819 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-03 19:43:05,819 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 358 places, 466 transitions, 5167 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) [2024-06-03 19:43:05,819 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:43:05,819 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-03 19:43:05,819 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:43:07,486 INFO L124 PetriNetUnfolderBase]: 3937/6237 cut-off events. [2024-06-03 19:43:07,486 INFO L125 PetriNetUnfolderBase]: For 1247253/1247253 co-relation queries the response was YES. [2024-06-03 19:43:07,556 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60023 conditions, 6237 events. 3937/6237 cut-off events. For 1247253/1247253 co-relation queries the response was YES. Maximal size of possible extension queue 384. Compared 37815 event pairs, 810 based on Foata normal form. 4/6240 useless extension candidates. Maximal degree in co-relation 59857. Up to 5882 conditions per place. [2024-06-03 19:43:07,584 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 412 selfloop transitions, 78 changer transitions 0/494 dead transitions. [2024-06-03 19:43:07,584 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 366 places, 494 transitions, 6593 flow [2024-06-03 19:43:07,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:43:07,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:43:07,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 163 transitions. [2024-06-03 19:43:07,585 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42118863049095606 [2024-06-03 19:43:07,585 INFO L175 Difference]: Start difference. First operand has 358 places, 466 transitions, 5167 flow. Second operand 9 states and 163 transitions. [2024-06-03 19:43:07,585 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 366 places, 494 transitions, 6593 flow [2024-06-03 19:43:09,985 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 360 places, 494 transitions, 6472 flow, removed 13 selfloop flow, removed 6 redundant places. [2024-06-03 19:43:09,990 INFO L231 Difference]: Finished difference. Result has 361 places, 472 transitions, 5338 flow [2024-06-03 19:43:09,990 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5046, PETRI_DIFFERENCE_MINUEND_PLACES=352, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=466, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=391, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5338, PETRI_PLACES=361, PETRI_TRANSITIONS=472} [2024-06-03 19:43:09,990 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 317 predicate places. [2024-06-03 19:43:09,990 INFO L495 AbstractCegarLoop]: Abstraction has has 361 places, 472 transitions, 5338 flow [2024-06-03 19:43:09,991 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) [2024-06-03 19:43:09,991 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:43:09,991 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:43:09,991 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108 [2024-06-03 19:43:09,991 INFO L420 AbstractCegarLoop]: === Iteration 110 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:43:09,991 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:43:09,991 INFO L85 PathProgramCache]: Analyzing trace with hash 540584022, now seen corresponding path program 4 times [2024-06-03 19:43:09,991 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:43:09,991 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1918304338] [2024-06-03 19:43:09,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:43:09,991 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:43:09,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:43:10,825 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:43:10,825 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:43:10,825 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1918304338] [2024-06-03 19:43:10,825 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1918304338] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:43:10,825 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:43:10,825 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:43:10,825 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1685351045] [2024-06-03 19:43:10,825 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:43:10,825 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:43:10,825 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:43:10,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:43:10,826 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:43:10,971 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-03 19:43:10,971 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 361 places, 472 transitions, 5338 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) [2024-06-03 19:43:10,971 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:43:10,972 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-03 19:43:10,972 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:43:12,404 INFO L124 PetriNetUnfolderBase]: 3866/6176 cut-off events. [2024-06-03 19:43:12,404 INFO L125 PetriNetUnfolderBase]: For 1264823/1264827 co-relation queries the response was YES. [2024-06-03 19:43:12,470 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60391 conditions, 6176 events. 3866/6176 cut-off events. For 1264823/1264827 co-relation queries the response was YES. Maximal size of possible extension queue 388. Compared 37888 event pairs, 842 based on Foata normal form. 6/6181 useless extension candidates. Maximal degree in co-relation 60224. Up to 5740 conditions per place. [2024-06-03 19:43:12,498 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 419 selfloop transitions, 51 changer transitions 0/495 dead transitions. [2024-06-03 19:43:12,498 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 368 places, 495 transitions, 6456 flow [2024-06-03 19:43:12,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:43:12,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:43:12,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 151 transitions. [2024-06-03 19:43:12,499 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.438953488372093 [2024-06-03 19:43:12,499 INFO L175 Difference]: Start difference. First operand has 361 places, 472 transitions, 5338 flow. Second operand 8 states and 151 transitions. [2024-06-03 19:43:12,499 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 368 places, 495 transitions, 6456 flow [2024-06-03 19:43:15,113 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 363 places, 495 transitions, 6351 flow, removed 29 selfloop flow, removed 5 redundant places. [2024-06-03 19:43:15,118 INFO L231 Difference]: Finished difference. Result has 364 places, 475 transitions, 5447 flow [2024-06-03 19:43:15,118 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5233, PETRI_DIFFERENCE_MINUEND_PLACES=356, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=472, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=421, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5447, PETRI_PLACES=364, PETRI_TRANSITIONS=475} [2024-06-03 19:43:15,118 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 320 predicate places. [2024-06-03 19:43:15,119 INFO L495 AbstractCegarLoop]: Abstraction has has 364 places, 475 transitions, 5447 flow [2024-06-03 19:43:15,119 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) [2024-06-03 19:43:15,119 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:43:15,119 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:43:15,119 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109 [2024-06-03 19:43:15,119 INFO L420 AbstractCegarLoop]: === Iteration 111 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:43:15,119 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:43:15,119 INFO L85 PathProgramCache]: Analyzing trace with hash 414231394, now seen corresponding path program 5 times [2024-06-03 19:43:15,120 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:43:15,120 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [360710323] [2024-06-03 19:43:15,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:43:15,120 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:43:15,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:43:15,935 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:43:15,935 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:43:15,935 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [360710323] [2024-06-03 19:43:15,936 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [360710323] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:43:15,936 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:43:15,936 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:43:15,936 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [359228479] [2024-06-03 19:43:15,936 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:43:15,936 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:43:15,936 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:43:15,936 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:43:15,936 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:43:16,018 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-03 19:43:16,018 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 364 places, 475 transitions, 5447 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) [2024-06-03 19:43:16,018 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:43:16,018 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-03 19:43:16,018 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:43:17,462 INFO L124 PetriNetUnfolderBase]: 3900/6225 cut-off events. [2024-06-03 19:43:17,462 INFO L125 PetriNetUnfolderBase]: For 1310358/1310362 co-relation queries the response was YES. [2024-06-03 19:43:17,533 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62008 conditions, 6225 events. 3900/6225 cut-off events. For 1310358/1310362 co-relation queries the response was YES. Maximal size of possible extension queue 394. Compared 38193 event pairs, 844 based on Foata normal form. 6/6230 useless extension candidates. Maximal degree in co-relation 61839. Up to 5642 conditions per place. [2024-06-03 19:43:17,562 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 389 selfloop transitions, 93 changer transitions 0/507 dead transitions. [2024-06-03 19:43:17,562 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 371 places, 507 transitions, 7505 flow [2024-06-03 19:43:17,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:43:17,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:43:17,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 155 transitions. [2024-06-03 19:43:17,563 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45058139534883723 [2024-06-03 19:43:17,563 INFO L175 Difference]: Start difference. First operand has 364 places, 475 transitions, 5447 flow. Second operand 8 states and 155 transitions. [2024-06-03 19:43:17,563 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 371 places, 507 transitions, 7505 flow [2024-06-03 19:43:20,314 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 365 places, 507 transitions, 7317 flow, removed 46 selfloop flow, removed 6 redundant places. [2024-06-03 19:43:20,319 INFO L231 Difference]: Finished difference. Result has 366 places, 484 transitions, 5769 flow [2024-06-03 19:43:20,320 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5259, PETRI_DIFFERENCE_MINUEND_PLACES=358, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=475, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=87, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=388, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5769, PETRI_PLACES=366, PETRI_TRANSITIONS=484} [2024-06-03 19:43:20,320 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 322 predicate places. [2024-06-03 19:43:20,320 INFO L495 AbstractCegarLoop]: Abstraction has has 366 places, 484 transitions, 5769 flow [2024-06-03 19:43:20,320 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) [2024-06-03 19:43:20,320 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:43:20,320 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:43:20,320 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110 [2024-06-03 19:43:20,320 INFO L420 AbstractCegarLoop]: === Iteration 112 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:43:20,321 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:43:20,321 INFO L85 PathProgramCache]: Analyzing trace with hash 414231580, now seen corresponding path program 4 times [2024-06-03 19:43:20,321 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:43:20,321 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1502273779] [2024-06-03 19:43:20,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:43:20,321 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:43:20,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:43:21,120 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:43:21,120 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:43:21,121 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1502273779] [2024-06-03 19:43:21,121 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1502273779] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:43:21,121 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:43:21,121 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:43:21,121 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [23735117] [2024-06-03 19:43:21,121 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:43:21,121 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:43:21,121 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:43:21,121 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:43:21,121 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:43:21,173 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-03 19:43:21,173 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 366 places, 484 transitions, 5769 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) [2024-06-03 19:43:21,173 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:43:21,173 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-03 19:43:21,173 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:43:22,663 INFO L124 PetriNetUnfolderBase]: 3999/6331 cut-off events. [2024-06-03 19:43:22,664 INFO L125 PetriNetUnfolderBase]: For 1342447/1342451 co-relation queries the response was YES. [2024-06-03 19:43:22,886 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63472 conditions, 6331 events. 3999/6331 cut-off events. For 1342447/1342451 co-relation queries the response was YES. Maximal size of possible extension queue 397. Compared 38500 event pairs, 874 based on Foata normal form. 6/6336 useless extension candidates. Maximal degree in co-relation 63302. Up to 5959 conditions per place. [2024-06-03 19:43:22,912 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 429 selfloop transitions, 79 changer transitions 0/512 dead transitions. [2024-06-03 19:43:22,912 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 373 places, 512 transitions, 7509 flow [2024-06-03 19:43:22,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:43:22,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:43:22,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 147 transitions. [2024-06-03 19:43:22,913 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4273255813953488 [2024-06-03 19:43:22,913 INFO L175 Difference]: Start difference. First operand has 366 places, 484 transitions, 5769 flow. Second operand 8 states and 147 transitions. [2024-06-03 19:43:22,913 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 373 places, 512 transitions, 7509 flow [2024-06-03 19:43:25,684 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 370 places, 512 transitions, 7271 flow, removed 86 selfloop flow, removed 3 redundant places. [2024-06-03 19:43:25,689 INFO L231 Difference]: Finished difference. Result has 371 places, 490 transitions, 5861 flow [2024-06-03 19:43:25,689 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5531, PETRI_DIFFERENCE_MINUEND_PLACES=363, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=484, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=408, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5861, PETRI_PLACES=371, PETRI_TRANSITIONS=490} [2024-06-03 19:43:25,690 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 327 predicate places. [2024-06-03 19:43:25,690 INFO L495 AbstractCegarLoop]: Abstraction has has 371 places, 490 transitions, 5861 flow [2024-06-03 19:43:25,690 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) [2024-06-03 19:43:25,690 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:43:25,690 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:43:25,690 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111 [2024-06-03 19:43:25,690 INFO L420 AbstractCegarLoop]: === Iteration 113 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:43:25,690 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:43:25,690 INFO L85 PathProgramCache]: Analyzing trace with hash 642012574, now seen corresponding path program 6 times [2024-06-03 19:43:25,690 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:43:25,690 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [521344253] [2024-06-03 19:43:25,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:43:25,691 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:43:25,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:43:26,526 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:43:26,526 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:43:26,526 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [521344253] [2024-06-03 19:43:26,526 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [521344253] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:43:26,526 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:43:26,526 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:43:26,527 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1702341128] [2024-06-03 19:43:26,527 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:43:26,527 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:43:26,527 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:43:26,527 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:43:26,527 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:43:26,610 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-03 19:43:26,611 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 371 places, 490 transitions, 5861 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) [2024-06-03 19:43:26,611 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:43:26,611 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-03 19:43:26,611 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:43:28,237 INFO L124 PetriNetUnfolderBase]: 3928/6264 cut-off events. [2024-06-03 19:43:28,237 INFO L125 PetriNetUnfolderBase]: For 1371131/1371135 co-relation queries the response was YES. [2024-06-03 19:43:28,299 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63658 conditions, 6264 events. 3928/6264 cut-off events. For 1371131/1371135 co-relation queries the response was YES. Maximal size of possible extension queue 399. Compared 38498 event pairs, 849 based on Foata normal form. 6/6269 useless extension candidates. Maximal degree in co-relation 63486. Up to 5789 conditions per place. [2024-06-03 19:43:28,324 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 426 selfloop transitions, 65 changer transitions 0/518 dead transitions. [2024-06-03 19:43:28,325 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 380 places, 518 transitions, 7259 flow [2024-06-03 19:43:28,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 19:43:28,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 19:43:28,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 182 transitions. [2024-06-03 19:43:28,332 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4232558139534884 [2024-06-03 19:43:28,332 INFO L175 Difference]: Start difference. First operand has 371 places, 490 transitions, 5861 flow. Second operand 10 states and 182 transitions. [2024-06-03 19:43:28,333 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 380 places, 518 transitions, 7259 flow [2024-06-03 19:43:31,071 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 376 places, 518 transitions, 7013 flow, removed 84 selfloop flow, removed 4 redundant places. [2024-06-03 19:43:31,077 INFO L231 Difference]: Finished difference. Result has 378 places, 493 transitions, 5836 flow [2024-06-03 19:43:31,077 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5615, PETRI_DIFFERENCE_MINUEND_PLACES=367, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=490, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=425, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5836, PETRI_PLACES=378, PETRI_TRANSITIONS=493} [2024-06-03 19:43:31,077 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 334 predicate places. [2024-06-03 19:43:31,077 INFO L495 AbstractCegarLoop]: Abstraction has has 378 places, 493 transitions, 5836 flow [2024-06-03 19:43:31,077 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) [2024-06-03 19:43:31,077 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:43:31,077 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:43:31,077 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112 [2024-06-03 19:43:31,077 INFO L420 AbstractCegarLoop]: === Iteration 114 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:43:31,078 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:43:31,078 INFO L85 PathProgramCache]: Analyzing trace with hash 653440414, now seen corresponding path program 7 times [2024-06-03 19:43:31,078 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:43:31,078 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1410510179] [2024-06-03 19:43:31,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:43:31,078 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:43:31,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:43:31,905 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:43:31,905 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:43:31,905 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1410510179] [2024-06-03 19:43:31,905 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1410510179] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:43:31,905 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:43:31,905 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:43:31,905 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [82694350] [2024-06-03 19:43:31,905 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:43:31,906 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:43:31,906 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:43:31,906 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:43:31,906 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:43:32,003 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-03 19:43:32,003 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 378 places, 493 transitions, 5836 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) [2024-06-03 19:43:32,003 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:43:32,003 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-03 19:43:32,003 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:43:33,505 INFO L124 PetriNetUnfolderBase]: 3920/6258 cut-off events. [2024-06-03 19:43:33,505 INFO L125 PetriNetUnfolderBase]: For 1378457/1378461 co-relation queries the response was YES. [2024-06-03 19:43:33,572 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63472 conditions, 6258 events. 3920/6258 cut-off events. For 1378457/1378461 co-relation queries the response was YES. Maximal size of possible extension queue 398. Compared 38491 event pairs, 844 based on Foata normal form. 6/6263 useless extension candidates. Maximal degree in co-relation 63297. Up to 5784 conditions per place. [2024-06-03 19:43:33,598 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 420 selfloop transitions, 64 changer transitions 0/511 dead transitions. [2024-06-03 19:43:33,599 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 385 places, 511 transitions, 6888 flow [2024-06-03 19:43:33,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:43:33,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:43:33,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 148 transitions. [2024-06-03 19:43:33,599 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43023255813953487 [2024-06-03 19:43:33,599 INFO L175 Difference]: Start difference. First operand has 378 places, 493 transitions, 5836 flow. Second operand 8 states and 148 transitions. [2024-06-03 19:43:33,599 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 385 places, 511 transitions, 6888 flow [2024-06-03 19:43:36,428 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 377 places, 511 transitions, 6679 flow, removed 36 selfloop flow, removed 8 redundant places. [2024-06-03 19:43:36,433 INFO L231 Difference]: Finished difference. Result has 378 places, 493 transitions, 5761 flow [2024-06-03 19:43:36,434 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5627, PETRI_DIFFERENCE_MINUEND_PLACES=370, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=493, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=429, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5761, PETRI_PLACES=378, PETRI_TRANSITIONS=493} [2024-06-03 19:43:36,434 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 334 predicate places. [2024-06-03 19:43:36,434 INFO L495 AbstractCegarLoop]: Abstraction has has 378 places, 493 transitions, 5761 flow [2024-06-03 19:43:36,434 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) [2024-06-03 19:43:36,434 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:43:36,434 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:43:36,435 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113 [2024-06-03 19:43:36,435 INFO L420 AbstractCegarLoop]: === Iteration 115 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:43:36,435 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:43:36,435 INFO L85 PathProgramCache]: Analyzing trace with hash -2079786, now seen corresponding path program 8 times [2024-06-03 19:43:36,435 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:43:36,435 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2125005906] [2024-06-03 19:43:36,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:43:36,436 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:43:36,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:43:37,244 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:43:37,244 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:43:37,244 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2125005906] [2024-06-03 19:43:37,244 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2125005906] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:43:37,244 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:43:37,244 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:43:37,244 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [143907793] [2024-06-03 19:43:37,244 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:43:37,244 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:43:37,244 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:43:37,245 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:43:37,245 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:43:37,320 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-03 19:43:37,320 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 378 places, 493 transitions, 5761 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) [2024-06-03 19:43:37,320 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:43:37,320 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-03 19:43:37,320 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:43:38,815 INFO L124 PetriNetUnfolderBase]: 3946/6298 cut-off events. [2024-06-03 19:43:38,816 INFO L125 PetriNetUnfolderBase]: For 1414811/1414815 co-relation queries the response was YES. [2024-06-03 19:43:38,886 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64196 conditions, 6298 events. 3946/6298 cut-off events. For 1414811/1414815 co-relation queries the response was YES. Maximal size of possible extension queue 402. Compared 38815 event pairs, 845 based on Foata normal form. 6/6303 useless extension candidates. Maximal degree in co-relation 64020. Up to 5690 conditions per place. [2024-06-03 19:43:38,913 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 385 selfloop transitions, 106 changer transitions 0/518 dead transitions. [2024-06-03 19:43:38,913 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 385 places, 518 transitions, 7467 flow [2024-06-03 19:43:38,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:43:38,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:43:38,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 151 transitions. [2024-06-03 19:43:38,914 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.438953488372093 [2024-06-03 19:43:38,914 INFO L175 Difference]: Start difference. First operand has 378 places, 493 transitions, 5761 flow. Second operand 8 states and 151 transitions. [2024-06-03 19:43:38,914 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 385 places, 518 transitions, 7467 flow [2024-06-03 19:43:41,750 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 378 places, 518 transitions, 7339 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-06-03 19:43:41,756 INFO L231 Difference]: Finished difference. Result has 379 places, 499 transitions, 6011 flow [2024-06-03 19:43:41,756 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5633, PETRI_DIFFERENCE_MINUEND_PLACES=371, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=493, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=100, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=393, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6011, PETRI_PLACES=379, PETRI_TRANSITIONS=499} [2024-06-03 19:43:41,756 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 335 predicate places. [2024-06-03 19:43:41,756 INFO L495 AbstractCegarLoop]: Abstraction has has 379 places, 499 transitions, 6011 flow [2024-06-03 19:43:41,756 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) [2024-06-03 19:43:41,757 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:43:41,757 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:43:41,757 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable114 [2024-06-03 19:43:41,757 INFO L420 AbstractCegarLoop]: === Iteration 116 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:43:41,757 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:43:41,757 INFO L85 PathProgramCache]: Analyzing trace with hash -2074020, now seen corresponding path program 5 times [2024-06-03 19:43:41,757 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:43:41,757 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [18758083] [2024-06-03 19:43:41,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:43:41,757 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:43:41,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:43:42,570 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:43:42,571 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:43:42,571 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [18758083] [2024-06-03 19:43:42,571 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [18758083] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:43:42,571 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:43:42,571 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:43:42,571 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [639167149] [2024-06-03 19:43:42,571 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:43:42,571 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:43:42,571 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:43:42,571 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:43:42,571 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:43:42,652 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-03 19:43:42,652 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 379 places, 499 transitions, 6011 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) [2024-06-03 19:43:42,652 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:43:42,652 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-03 19:43:42,652 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:43:44,076 INFO L124 PetriNetUnfolderBase]: 4055/6411 cut-off events. [2024-06-03 19:43:44,076 INFO L125 PetriNetUnfolderBase]: For 1449233/1449237 co-relation queries the response was YES. [2024-06-03 19:43:44,149 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65473 conditions, 6411 events. 4055/6411 cut-off events. For 1449233/1449237 co-relation queries the response was YES. Maximal size of possible extension queue 406. Compared 39020 event pairs, 868 based on Foata normal form. 6/6416 useless extension candidates. Maximal degree in co-relation 65296. Up to 6026 conditions per place. [2024-06-03 19:43:44,177 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 434 selfloop transitions, 86 changer transitions 0/524 dead transitions. [2024-06-03 19:43:44,177 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 386 places, 524 transitions, 7703 flow [2024-06-03 19:43:44,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:43:44,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:43:44,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 144 transitions. [2024-06-03 19:43:44,178 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4186046511627907 [2024-06-03 19:43:44,178 INFO L175 Difference]: Start difference. First operand has 379 places, 499 transitions, 6011 flow. Second operand 8 states and 144 transitions. [2024-06-03 19:43:44,178 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 386 places, 524 transitions, 7703 flow [2024-06-03 19:43:46,829 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 381 places, 524 transitions, 7476 flow, removed 43 selfloop flow, removed 5 redundant places. [2024-06-03 19:43:46,834 INFO L231 Difference]: Finished difference. Result has 382 places, 505 transitions, 6046 flow [2024-06-03 19:43:46,834 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5784, PETRI_DIFFERENCE_MINUEND_PLACES=374, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=499, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=80, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=419, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6046, PETRI_PLACES=382, PETRI_TRANSITIONS=505} [2024-06-03 19:43:46,835 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 338 predicate places. [2024-06-03 19:43:46,835 INFO L495 AbstractCegarLoop]: Abstraction has has 382 places, 505 transitions, 6046 flow [2024-06-03 19:43:46,835 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) [2024-06-03 19:43:46,835 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:43:46,835 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:43:46,835 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115 [2024-06-03 19:43:46,835 INFO L420 AbstractCegarLoop]: === Iteration 117 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:43:46,835 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:43:46,835 INFO L85 PathProgramCache]: Analyzing trace with hash -1093236134, now seen corresponding path program 9 times [2024-06-03 19:43:46,835 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:43:46,835 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1481599721] [2024-06-03 19:43:46,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:43:46,835 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:43:46,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:43:47,642 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:43:47,642 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:43:47,642 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1481599721] [2024-06-03 19:43:47,643 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1481599721] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:43:47,643 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:43:47,643 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:43:47,643 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1403274959] [2024-06-03 19:43:47,643 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:43:47,643 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:43:47,643 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:43:47,643 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:43:47,643 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:43:47,733 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-03 19:43:47,733 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 382 places, 505 transitions, 6046 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) [2024-06-03 19:43:47,733 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:43:47,733 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-03 19:43:47,733 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:43:49,193 INFO L124 PetriNetUnfolderBase]: 3961/6319 cut-off events. [2024-06-03 19:43:49,194 INFO L125 PetriNetUnfolderBase]: For 1460935/1460939 co-relation queries the response was YES. [2024-06-03 19:43:49,264 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64651 conditions, 6319 events. 3961/6319 cut-off events. For 1460935/1460939 co-relation queries the response was YES. Maximal size of possible extension queue 405. Compared 38955 event pairs, 840 based on Foata normal form. 6/6324 useless extension candidates. Maximal degree in co-relation 64474. Up to 5710 conditions per place. [2024-06-03 19:43:49,291 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 389 selfloop transitions, 105 changer transitions 0/523 dead transitions. [2024-06-03 19:43:49,291 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 389 places, 523 transitions, 7372 flow [2024-06-03 19:43:49,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:43:49,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:43:49,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 150 transitions. [2024-06-03 19:43:49,292 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.436046511627907 [2024-06-03 19:43:49,292 INFO L175 Difference]: Start difference. First operand has 382 places, 505 transitions, 6046 flow. Second operand 8 states and 150 transitions. [2024-06-03 19:43:49,292 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 389 places, 523 transitions, 7372 flow [2024-06-03 19:43:52,476 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 385 places, 523 transitions, 7170 flow, removed 48 selfloop flow, removed 4 redundant places. [2024-06-03 19:43:52,481 INFO L231 Difference]: Finished difference. Result has 386 places, 505 transitions, 6060 flow [2024-06-03 19:43:52,481 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5844, PETRI_DIFFERENCE_MINUEND_PLACES=378, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=505, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=105, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=400, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6060, PETRI_PLACES=386, PETRI_TRANSITIONS=505} [2024-06-03 19:43:52,482 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 342 predicate places. [2024-06-03 19:43:52,482 INFO L495 AbstractCegarLoop]: Abstraction has has 386 places, 505 transitions, 6060 flow [2024-06-03 19:43:52,482 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) [2024-06-03 19:43:52,482 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:43:52,482 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:43:52,482 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116 [2024-06-03 19:43:52,482 INFO L420 AbstractCegarLoop]: === Iteration 118 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:43:52,482 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:43:52,483 INFO L85 PathProgramCache]: Analyzing trace with hash -773314278, now seen corresponding path program 6 times [2024-06-03 19:43:52,483 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:43:52,483 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [583308280] [2024-06-03 19:43:52,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:43:52,483 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:43:52,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:43:53,288 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:43:53,288 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:43:53,288 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [583308280] [2024-06-03 19:43:53,288 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [583308280] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:43:53,288 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:43:53,288 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:43:53,288 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1466386648] [2024-06-03 19:43:53,288 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:43:53,289 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:43:53,289 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:43:53,289 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:43:53,289 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:43:53,350 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-03 19:43:53,350 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 386 places, 505 transitions, 6060 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) [2024-06-03 19:43:53,350 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:43:53,350 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-03 19:43:53,350 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:43:54,993 INFO L124 PetriNetUnfolderBase]: 4043/6397 cut-off events. [2024-06-03 19:43:54,993 INFO L125 PetriNetUnfolderBase]: For 1468669/1468673 co-relation queries the response was YES. [2024-06-03 19:43:55,057 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65070 conditions, 6397 events. 4043/6397 cut-off events. For 1468669/1468673 co-relation queries the response was YES. Maximal size of possible extension queue 407. Compared 38948 event pairs, 868 based on Foata normal form. 6/6402 useless extension candidates. Maximal degree in co-relation 64892. Up to 6013 conditions per place. [2024-06-03 19:43:55,082 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 435 selfloop transitions, 84 changer transitions 0/523 dead transitions. [2024-06-03 19:43:55,082 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 393 places, 523 transitions, 7438 flow [2024-06-03 19:43:55,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:43:55,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:43:55,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 144 transitions. [2024-06-03 19:43:55,083 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4186046511627907 [2024-06-03 19:43:55,083 INFO L175 Difference]: Start difference. First operand has 386 places, 505 transitions, 6060 flow. Second operand 8 states and 144 transitions. [2024-06-03 19:43:55,083 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 393 places, 523 transitions, 7438 flow [2024-06-03 19:43:58,080 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 386 places, 523 transitions, 7196 flow, removed 10 selfloop flow, removed 7 redundant places. [2024-06-03 19:43:58,085 INFO L231 Difference]: Finished difference. Result has 387 places, 505 transitions, 5992 flow [2024-06-03 19:43:58,085 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5818, PETRI_DIFFERENCE_MINUEND_PLACES=379, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=505, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=84, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=421, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5992, PETRI_PLACES=387, PETRI_TRANSITIONS=505} [2024-06-03 19:43:58,086 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 343 predicate places. [2024-06-03 19:43:58,086 INFO L495 AbstractCegarLoop]: Abstraction has has 387 places, 505 transitions, 5992 flow [2024-06-03 19:43:58,086 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) [2024-06-03 19:43:58,086 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:43:58,086 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:43:58,086 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117 [2024-06-03 19:43:58,086 INFO L420 AbstractCegarLoop]: === Iteration 119 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:43:58,086 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:43:58,086 INFO L85 PathProgramCache]: Analyzing trace with hash -1562895046, now seen corresponding path program 7 times [2024-06-03 19:43:58,086 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:43:58,087 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2114681408] [2024-06-03 19:43:58,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:43:58,087 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:43:58,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:43:58,831 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:43:58,831 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:43:58,831 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2114681408] [2024-06-03 19:43:58,831 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2114681408] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:43:58,831 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:43:58,831 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:43:58,831 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1879440590] [2024-06-03 19:43:58,831 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:43:58,831 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:43:58,831 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:43:58,832 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:43:58,832 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:43:58,900 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-03 19:43:58,901 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 387 places, 505 transitions, 5992 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) [2024-06-03 19:43:58,901 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:43:58,901 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-03 19:43:58,901 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:44:00,449 INFO L124 PetriNetUnfolderBase]: 4053/6410 cut-off events. [2024-06-03 19:44:00,449 INFO L125 PetriNetUnfolderBase]: For 1491283/1491287 co-relation queries the response was YES. [2024-06-03 19:44:00,514 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65292 conditions, 6410 events. 4053/6410 cut-off events. For 1491283/1491287 co-relation queries the response was YES. Maximal size of possible extension queue 406. Compared 38968 event pairs, 868 based on Foata normal form. 6/6415 useless extension candidates. Maximal degree in co-relation 65113. Up to 6184 conditions per place. [2024-06-03 19:44:00,540 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 477 selfloop transitions, 40 changer transitions 0/521 dead transitions. [2024-06-03 19:44:00,540 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 394 places, 521 transitions, 7388 flow [2024-06-03 19:44:00,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:44:00,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:44:00,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 135 transitions. [2024-06-03 19:44:00,541 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39244186046511625 [2024-06-03 19:44:00,541 INFO L175 Difference]: Start difference. First operand has 387 places, 505 transitions, 5992 flow. Second operand 8 states and 135 transitions. [2024-06-03 19:44:00,541 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 394 places, 521 transitions, 7388 flow [2024-06-03 19:44:03,966 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 388 places, 521 transitions, 7251 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-06-03 19:44:03,971 INFO L231 Difference]: Finished difference. Result has 389 places, 508 transitions, 6005 flow [2024-06-03 19:44:03,971 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5858, PETRI_DIFFERENCE_MINUEND_PLACES=381, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=505, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=468, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6005, PETRI_PLACES=389, PETRI_TRANSITIONS=508} [2024-06-03 19:44:03,972 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 345 predicate places. [2024-06-03 19:44:03,972 INFO L495 AbstractCegarLoop]: Abstraction has has 389 places, 508 transitions, 6005 flow [2024-06-03 19:44:03,972 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) [2024-06-03 19:44:03,972 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:44:03,972 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:44:03,972 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118 [2024-06-03 19:44:03,972 INFO L420 AbstractCegarLoop]: === Iteration 120 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:44:03,973 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:44:03,973 INFO L85 PathProgramCache]: Analyzing trace with hash -566311262, now seen corresponding path program 4 times [2024-06-03 19:44:03,973 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:44:03,973 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1134919043] [2024-06-03 19:44:03,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:44:03,973 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:44:03,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:44:04,873 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:44:04,873 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:44:04,873 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1134919043] [2024-06-03 19:44:04,873 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1134919043] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:44:04,873 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:44:04,873 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:44:04,873 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1080723636] [2024-06-03 19:44:04,873 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:44:04,873 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:44:04,873 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:44:04,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:44:04,874 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:44:04,943 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-03 19:44:04,943 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 389 places, 508 transitions, 6005 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) [2024-06-03 19:44:04,943 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:44:04,943 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-03 19:44:04,943 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:44:06,530 INFO L124 PetriNetUnfolderBase]: 3964/6315 cut-off events. [2024-06-03 19:44:06,530 INFO L125 PetriNetUnfolderBase]: For 1503841/1503841 co-relation queries the response was YES. [2024-06-03 19:44:06,603 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64703 conditions, 6315 events. 3964/6315 cut-off events. For 1503841/1503841 co-relation queries the response was YES. Maximal size of possible extension queue 407. Compared 38757 event pairs, 793 based on Foata normal form. 1/6315 useless extension candidates. Maximal degree in co-relation 64523. Up to 5933 conditions per place. [2024-06-03 19:44:06,631 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 439 selfloop transitions, 49 changer transitions 0/518 dead transitions. [2024-06-03 19:44:06,631 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 396 places, 518 transitions, 7009 flow [2024-06-03 19:44:06,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:44:06,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:44:06,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 138 transitions. [2024-06-03 19:44:06,632 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4011627906976744 [2024-06-03 19:44:06,632 INFO L175 Difference]: Start difference. First operand has 389 places, 508 transitions, 6005 flow. Second operand 8 states and 138 transitions. [2024-06-03 19:44:06,632 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 396 places, 518 transitions, 7009 flow [2024-06-03 19:44:09,342 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 390 places, 518 transitions, 6835 flow, removed 33 selfloop flow, removed 6 redundant places. [2024-06-03 19:44:09,348 INFO L231 Difference]: Finished difference. Result has 391 places, 508 transitions, 5935 flow [2024-06-03 19:44:09,348 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5831, PETRI_DIFFERENCE_MINUEND_PLACES=383, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=508, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=459, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5935, PETRI_PLACES=391, PETRI_TRANSITIONS=508} [2024-06-03 19:44:09,348 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 347 predicate places. [2024-06-03 19:44:09,348 INFO L495 AbstractCegarLoop]: Abstraction has has 391 places, 508 transitions, 5935 flow [2024-06-03 19:44:09,349 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) [2024-06-03 19:44:09,349 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:44:09,349 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:44:09,349 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119 [2024-06-03 19:44:09,349 INFO L420 AbstractCegarLoop]: === Iteration 121 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:44:09,349 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:44:09,349 INFO L85 PathProgramCache]: Analyzing trace with hash -806390790, now seen corresponding path program 8 times [2024-06-03 19:44:09,349 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:44:09,349 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [189016475] [2024-06-03 19:44:09,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:44:09,350 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:44:09,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:44:10,132 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:44:10,133 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:44:10,133 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [189016475] [2024-06-03 19:44:10,133 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [189016475] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:44:10,133 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:44:10,133 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:44:10,133 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1871659436] [2024-06-03 19:44:10,133 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:44:10,134 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:44:10,134 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:44:10,134 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:44:10,134 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:44:10,192 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-03 19:44:10,192 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 391 places, 508 transitions, 5935 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) [2024-06-03 19:44:10,192 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:44:10,192 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-03 19:44:10,193 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:44:11,691 INFO L124 PetriNetUnfolderBase]: 4076/6448 cut-off events. [2024-06-03 19:44:11,692 INFO L125 PetriNetUnfolderBase]: For 1544675/1544679 co-relation queries the response was YES. [2024-06-03 19:44:11,767 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65798 conditions, 6448 events. 4076/6448 cut-off events. For 1544675/1544679 co-relation queries the response was YES. Maximal size of possible extension queue 412. Compared 39308 event pairs, 862 based on Foata normal form. 6/6453 useless extension candidates. Maximal degree in co-relation 65617. Up to 6155 conditions per place. [2024-06-03 19:44:11,797 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 459 selfloop transitions, 66 changer transitions 0/529 dead transitions. [2024-06-03 19:44:11,797 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 398 places, 529 transitions, 7641 flow [2024-06-03 19:44:11,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:44:11,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:44:11,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 138 transitions. [2024-06-03 19:44:11,798 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4011627906976744 [2024-06-03 19:44:11,798 INFO L175 Difference]: Start difference. First operand has 391 places, 508 transitions, 5935 flow. Second operand 8 states and 138 transitions. [2024-06-03 19:44:11,798 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 398 places, 529 transitions, 7641 flow [2024-06-03 19:44:15,717 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 390 places, 529 transitions, 7465 flow, removed 9 selfloop flow, removed 8 redundant places. [2024-06-03 19:44:15,722 INFO L231 Difference]: Finished difference. Result has 391 places, 514 transitions, 5993 flow [2024-06-03 19:44:15,723 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5759, PETRI_DIFFERENCE_MINUEND_PLACES=383, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=508, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=448, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5993, PETRI_PLACES=391, PETRI_TRANSITIONS=514} [2024-06-03 19:44:15,723 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 347 predicate places. [2024-06-03 19:44:15,723 INFO L495 AbstractCegarLoop]: Abstraction has has 391 places, 514 transitions, 5993 flow [2024-06-03 19:44:15,723 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) [2024-06-03 19:44:15,723 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:44:15,723 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:44:15,723 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120 [2024-06-03 19:44:15,723 INFO L420 AbstractCegarLoop]: === Iteration 122 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:44:15,724 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:44:15,724 INFO L85 PathProgramCache]: Analyzing trace with hash -983938206, now seen corresponding path program 10 times [2024-06-03 19:44:15,724 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:44:15,724 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1381938131] [2024-06-03 19:44:15,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:44:15,724 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:44:15,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:44:16,475 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:44:16,475 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:44:16,475 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1381938131] [2024-06-03 19:44:16,475 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1381938131] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:44:16,475 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:44:16,475 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:44:16,476 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1257965274] [2024-06-03 19:44:16,476 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:44:16,476 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:44:16,476 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:44:16,476 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:44:16,476 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:44:16,590 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-03 19:44:16,590 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 391 places, 514 transitions, 5993 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) [2024-06-03 19:44:16,590 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:44:16,590 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-03 19:44:16,590 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:44:18,285 INFO L124 PetriNetUnfolderBase]: 3980/6348 cut-off events. [2024-06-03 19:44:18,297 INFO L125 PetriNetUnfolderBase]: For 1557357/1557361 co-relation queries the response was YES. [2024-06-03 19:44:18,359 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65138 conditions, 6348 events. 3980/6348 cut-off events. For 1557357/1557361 co-relation queries the response was YES. Maximal size of possible extension queue 410. Compared 39104 event pairs, 842 based on Foata normal form. 6/6353 useless extension candidates. Maximal degree in co-relation 64956. Up to 5999 conditions per place. [2024-06-03 19:44:18,383 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 465 selfloop transitions, 29 changer transitions 0/526 dead transitions. [2024-06-03 19:44:18,383 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 398 places, 526 transitions, 7041 flow [2024-06-03 19:44:18,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:44:18,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:44:18,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 138 transitions. [2024-06-03 19:44:18,384 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4011627906976744 [2024-06-03 19:44:18,384 INFO L175 Difference]: Start difference. First operand has 391 places, 514 transitions, 5993 flow. Second operand 8 states and 138 transitions. [2024-06-03 19:44:18,384 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 398 places, 526 transitions, 7041 flow [2024-06-03 19:44:21,688 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 392 places, 526 transitions, 6758 flow, removed 45 selfloop flow, removed 6 redundant places. [2024-06-03 19:44:21,693 INFO L231 Difference]: Finished difference. Result has 393 places, 514 transitions, 5774 flow [2024-06-03 19:44:21,693 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5710, PETRI_DIFFERENCE_MINUEND_PLACES=385, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=514, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=485, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5774, PETRI_PLACES=393, PETRI_TRANSITIONS=514} [2024-06-03 19:44:21,694 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 349 predicate places. [2024-06-03 19:44:21,694 INFO L495 AbstractCegarLoop]: Abstraction has has 393 places, 514 transitions, 5774 flow [2024-06-03 19:44:21,694 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) [2024-06-03 19:44:21,694 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:44:21,694 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:44:21,694 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121 [2024-06-03 19:44:21,694 INFO L420 AbstractCegarLoop]: === Iteration 123 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:44:21,694 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:44:21,694 INFO L85 PathProgramCache]: Analyzing trace with hash -983700870, now seen corresponding path program 9 times [2024-06-03 19:44:21,694 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:44:21,694 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [64547561] [2024-06-03 19:44:21,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:44:21,695 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:44:21,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:44:22,426 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:44:22,426 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:44:22,426 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [64547561] [2024-06-03 19:44:22,426 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [64547561] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:44:22,426 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:44:22,426 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:44:22,426 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1768491243] [2024-06-03 19:44:22,426 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:44:22,426 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:44:22,427 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:44:22,427 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:44:22,427 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:44:22,521 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-03 19:44:22,521 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 393 places, 514 transitions, 5774 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) [2024-06-03 19:44:22,521 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:44:22,521 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-03 19:44:22,521 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:44:24,282 INFO L124 PetriNetUnfolderBase]: 4080/6452 cut-off events. [2024-06-03 19:44:24,283 INFO L125 PetriNetUnfolderBase]: For 1575826/1575830 co-relation queries the response was YES. [2024-06-03 19:44:24,353 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65694 conditions, 6452 events. 4080/6452 cut-off events. For 1575826/1575830 co-relation queries the response was YES. Maximal size of possible extension queue 413. Compared 39279 event pairs, 872 based on Foata normal form. 6/6457 useless extension candidates. Maximal degree in co-relation 65511. Up to 6241 conditions per place. [2024-06-03 19:44:24,381 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 489 selfloop transitions, 36 changer transitions 0/529 dead transitions. [2024-06-03 19:44:24,381 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 400 places, 529 transitions, 6928 flow [2024-06-03 19:44:24,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:44:24,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:44:24,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 132 transitions. [2024-06-03 19:44:24,382 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38372093023255816 [2024-06-03 19:44:24,382 INFO L175 Difference]: Start difference. First operand has 393 places, 514 transitions, 5774 flow. Second operand 8 states and 132 transitions. [2024-06-03 19:44:24,382 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 400 places, 529 transitions, 6928 flow [2024-06-03 19:44:28,234 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 393 places, 529 transitions, 6828 flow, removed 10 selfloop flow, removed 7 redundant places. [2024-06-03 19:44:28,240 INFO L231 Difference]: Finished difference. Result has 394 places, 518 transitions, 5818 flow [2024-06-03 19:44:28,240 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5674, PETRI_DIFFERENCE_MINUEND_PLACES=386, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=514, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=479, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5818, PETRI_PLACES=394, PETRI_TRANSITIONS=518} [2024-06-03 19:44:28,240 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 350 predicate places. [2024-06-03 19:44:28,240 INFO L495 AbstractCegarLoop]: Abstraction has has 394 places, 518 transitions, 5818 flow [2024-06-03 19:44:28,240 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) [2024-06-03 19:44:28,240 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:44:28,240 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:44:28,240 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122 [2024-06-03 19:44:28,240 INFO L420 AbstractCegarLoop]: === Iteration 124 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:44:28,241 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:44:28,241 INFO L85 PathProgramCache]: Analyzing trace with hash -806569536, now seen corresponding path program 11 times [2024-06-03 19:44:28,241 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:44:28,241 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1308630999] [2024-06-03 19:44:28,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:44:28,241 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:44:28,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:44:29,019 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:44:29,020 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:44:29,020 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1308630999] [2024-06-03 19:44:29,020 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1308630999] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:44:29,020 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:44:29,020 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:44:29,020 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1481970023] [2024-06-03 19:44:29,020 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:44:29,020 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:44:29,020 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:44:29,020 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:44:29,020 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:44:29,096 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-03 19:44:29,096 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 394 places, 518 transitions, 5818 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) [2024-06-03 19:44:29,096 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:44:29,097 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-03 19:44:29,097 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:44:30,651 INFO L124 PetriNetUnfolderBase]: 3994/6376 cut-off events. [2024-06-03 19:44:30,651 INFO L125 PetriNetUnfolderBase]: For 1603542/1603546 co-relation queries the response was YES. [2024-06-03 19:44:30,722 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65477 conditions, 6376 events. 3994/6376 cut-off events. For 1603542/1603546 co-relation queries the response was YES. Maximal size of possible extension queue 415. Compared 39388 event pairs, 835 based on Foata normal form. 6/6381 useless extension candidates. Maximal degree in co-relation 65293. Up to 5980 conditions per place. [2024-06-03 19:44:30,749 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 454 selfloop transitions, 48 changer transitions 0/535 dead transitions. [2024-06-03 19:44:30,749 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 401 places, 535 transitions, 7223 flow [2024-06-03 19:44:30,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:44:30,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:44:30,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 142 transitions. [2024-06-03 19:44:30,750 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4127906976744186 [2024-06-03 19:44:30,750 INFO L175 Difference]: Start difference. First operand has 394 places, 518 transitions, 5818 flow. Second operand 8 states and 142 transitions. [2024-06-03 19:44:30,750 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 401 places, 535 transitions, 7223 flow [2024-06-03 19:44:34,768 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 396 places, 535 transitions, 7121 flow, removed 18 selfloop flow, removed 5 redundant places. [2024-06-03 19:44:34,774 INFO L231 Difference]: Finished difference. Result has 397 places, 521 transitions, 5895 flow [2024-06-03 19:44:34,774 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5716, PETRI_DIFFERENCE_MINUEND_PLACES=389, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=518, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=473, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5895, PETRI_PLACES=397, PETRI_TRANSITIONS=521} [2024-06-03 19:44:34,774 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 353 predicate places. [2024-06-03 19:44:34,774 INFO L495 AbstractCegarLoop]: Abstraction has has 397 places, 521 transitions, 5895 flow [2024-06-03 19:44:34,774 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) [2024-06-03 19:44:34,774 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:44:34,774 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:44:34,774 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123 [2024-06-03 19:44:34,774 INFO L420 AbstractCegarLoop]: === Iteration 125 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:44:34,775 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:44:34,775 INFO L85 PathProgramCache]: Analyzing trace with hash -578489640, now seen corresponding path program 10 times [2024-06-03 19:44:34,775 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:44:34,775 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1092151509] [2024-06-03 19:44:34,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:44:34,775 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:44:34,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:44:35,521 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:44:35,522 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:44:35,522 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1092151509] [2024-06-03 19:44:35,522 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1092151509] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:44:35,522 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:44:35,522 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:44:35,522 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [553314202] [2024-06-03 19:44:35,522 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:44:35,522 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:44:35,522 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:44:35,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:44:35,523 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:44:35,578 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-03 19:44:35,579 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 397 places, 521 transitions, 5895 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) [2024-06-03 19:44:35,579 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:44:35,579 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-03 19:44:35,579 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:44:37,228 INFO L124 PetriNetUnfolderBase]: 4084/6460 cut-off events. [2024-06-03 19:44:37,229 INFO L125 PetriNetUnfolderBase]: For 1610376/1610380 co-relation queries the response was YES. [2024-06-03 19:44:37,300 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65965 conditions, 6460 events. 4084/6460 cut-off events. For 1610376/1610380 co-relation queries the response was YES. Maximal size of possible extension queue 417. Compared 39384 event pairs, 873 based on Foata normal form. 6/6465 useless extension candidates. Maximal degree in co-relation 65780. Up to 6223 conditions per place. [2024-06-03 19:44:37,327 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 482 selfloop transitions, 48 changer transitions 0/534 dead transitions. [2024-06-03 19:44:37,327 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 404 places, 534 transitions, 7265 flow [2024-06-03 19:44:37,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:44:37,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:44:37,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 134 transitions. [2024-06-03 19:44:37,328 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38953488372093026 [2024-06-03 19:44:37,328 INFO L175 Difference]: Start difference. First operand has 397 places, 521 transitions, 5895 flow. Second operand 8 states and 134 transitions. [2024-06-03 19:44:37,328 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 404 places, 534 transitions, 7265 flow [2024-06-03 19:44:41,167 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 398 places, 534 transitions, 7063 flow, removed 34 selfloop flow, removed 6 redundant places. [2024-06-03 19:44:41,172 INFO L231 Difference]: Finished difference. Result has 399 places, 521 transitions, 5795 flow [2024-06-03 19:44:41,172 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5693, PETRI_DIFFERENCE_MINUEND_PLACES=391, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=521, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=473, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5795, PETRI_PLACES=399, PETRI_TRANSITIONS=521} [2024-06-03 19:44:41,173 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 355 predicate places. [2024-06-03 19:44:41,173 INFO L495 AbstractCegarLoop]: Abstraction has has 399 places, 521 transitions, 5795 flow [2024-06-03 19:44:41,173 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) [2024-06-03 19:44:41,173 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:44:41,173 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:44:41,173 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable124 [2024-06-03 19:44:41,173 INFO L420 AbstractCegarLoop]: === Iteration 126 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:44:41,173 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:44:41,173 INFO L85 PathProgramCache]: Analyzing trace with hash -806806500, now seen corresponding path program 11 times [2024-06-03 19:44:41,173 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:44:41,173 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [683591308] [2024-06-03 19:44:41,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:44:41,174 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:44:41,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:44:41,941 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:44:41,942 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:44:41,942 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [683591308] [2024-06-03 19:44:41,942 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [683591308] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:44:41,942 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:44:41,942 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:44:41,942 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [89220690] [2024-06-03 19:44:41,942 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:44:41,942 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:44:41,942 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:44:41,942 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:44:41,942 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:44:41,990 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-03 19:44:41,991 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 399 places, 521 transitions, 5795 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) [2024-06-03 19:44:41,991 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:44:41,991 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-03 19:44:41,991 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:44:43,607 INFO L124 PetriNetUnfolderBase]: 4078/6458 cut-off events. [2024-06-03 19:44:43,608 INFO L125 PetriNetUnfolderBase]: For 1617737/1617741 co-relation queries the response was YES. [2024-06-03 19:44:43,684 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65750 conditions, 6458 events. 4078/6458 cut-off events. For 1617737/1617741 co-relation queries the response was YES. Maximal size of possible extension queue 415. Compared 39477 event pairs, 864 based on Foata normal form. 6/6463 useless extension candidates. Maximal degree in co-relation 65564. Up to 6161 conditions per place. [2024-06-03 19:44:43,713 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 462 selfloop transitions, 69 changer transitions 0/535 dead transitions. [2024-06-03 19:44:43,713 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 406 places, 535 transitions, 7185 flow [2024-06-03 19:44:43,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:44:43,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:44:43,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 137 transitions. [2024-06-03 19:44:43,714 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39825581395348836 [2024-06-03 19:44:43,714 INFO L175 Difference]: Start difference. First operand has 399 places, 521 transitions, 5795 flow. Second operand 8 states and 137 transitions. [2024-06-03 19:44:43,714 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 406 places, 535 transitions, 7185 flow [2024-06-03 19:44:48,360 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 400 places, 535 transitions, 7023 flow, removed 26 selfloop flow, removed 6 redundant places. [2024-06-03 19:44:48,365 INFO L231 Difference]: Finished difference. Result has 401 places, 521 transitions, 5777 flow [2024-06-03 19:44:48,365 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5633, PETRI_DIFFERENCE_MINUEND_PLACES=393, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=521, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=452, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5777, PETRI_PLACES=401, PETRI_TRANSITIONS=521} [2024-06-03 19:44:48,365 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 357 predicate places. [2024-06-03 19:44:48,365 INFO L495 AbstractCegarLoop]: Abstraction has has 401 places, 521 transitions, 5777 flow [2024-06-03 19:44:48,365 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) [2024-06-03 19:44:48,365 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:44:48,366 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:44:48,366 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable125 [2024-06-03 19:44:48,366 INFO L420 AbstractCegarLoop]: === Iteration 127 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:44:48,366 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:44:48,366 INFO L85 PathProgramCache]: Analyzing trace with hash -1256725530, now seen corresponding path program 12 times [2024-06-03 19:44:48,366 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:44:48,366 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1798035811] [2024-06-03 19:44:48,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:44:48,366 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:44:48,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:44:49,146 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:44:49,147 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:44:49,147 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1798035811] [2024-06-03 19:44:49,147 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1798035811] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:44:49,147 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:44:49,147 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:44:49,147 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [945753028] [2024-06-03 19:44:49,147 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:44:49,147 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:44:49,147 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:44:49,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:44:49,147 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:44:49,225 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-03 19:44:49,225 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 401 places, 521 transitions, 5777 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) [2024-06-03 19:44:49,225 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:44:49,225 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-03 19:44:49,225 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:44:50,765 INFO L124 PetriNetUnfolderBase]: 3977/6359 cut-off events. [2024-06-03 19:44:50,765 INFO L125 PetriNetUnfolderBase]: For 1629302/1629306 co-relation queries the response was YES. [2024-06-03 19:44:50,837 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65021 conditions, 6359 events. 3977/6359 cut-off events. For 1629302/1629306 co-relation queries the response was YES. Maximal size of possible extension queue 417. Compared 39369 event pairs, 837 based on Foata normal form. 6/6364 useless extension candidates. Maximal degree in co-relation 64835. Up to 5964 conditions per place. [2024-06-03 19:44:50,865 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 455 selfloop transitions, 46 changer transitions 0/534 dead transitions. [2024-06-03 19:44:50,865 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 408 places, 534 transitions, 6855 flow [2024-06-03 19:44:50,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:44:50,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:44:50,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 142 transitions. [2024-06-03 19:44:50,866 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4127906976744186 [2024-06-03 19:44:50,866 INFO L175 Difference]: Start difference. First operand has 401 places, 521 transitions, 5777 flow. Second operand 8 states and 142 transitions. [2024-06-03 19:44:50,866 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 408 places, 534 transitions, 6855 flow [2024-06-03 19:44:54,503 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 400 places, 534 transitions, 6619 flow, removed 28 selfloop flow, removed 8 redundant places. [2024-06-03 19:44:54,508 INFO L231 Difference]: Finished difference. Result has 401 places, 521 transitions, 5639 flow [2024-06-03 19:44:54,508 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5541, PETRI_DIFFERENCE_MINUEND_PLACES=393, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=521, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=475, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5639, PETRI_PLACES=401, PETRI_TRANSITIONS=521} [2024-06-03 19:44:54,508 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 357 predicate places. [2024-06-03 19:44:54,508 INFO L495 AbstractCegarLoop]: Abstraction has has 401 places, 521 transitions, 5639 flow [2024-06-03 19:44:54,509 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) [2024-06-03 19:44:54,509 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:44:54,509 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:44:54,509 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126 [2024-06-03 19:44:54,509 INFO L420 AbstractCegarLoop]: === Iteration 128 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:44:54,509 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:44:54,509 INFO L85 PathProgramCache]: Analyzing trace with hash -584203560, now seen corresponding path program 12 times [2024-06-03 19:44:54,509 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:44:54,510 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1905994708] [2024-06-03 19:44:54,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:44:54,510 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:44:54,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:44:55,222 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:44:55,223 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:44:55,223 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1905994708] [2024-06-03 19:44:55,223 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1905994708] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:44:55,223 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:44:55,223 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:44:55,223 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1480010746] [2024-06-03 19:44:55,223 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:44:55,223 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:44:55,224 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:44:55,224 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:44:55,225 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:44:55,281 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-03 19:44:55,282 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 401 places, 521 transitions, 5639 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) [2024-06-03 19:44:55,282 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:44:55,282 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-03 19:44:55,282 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:44:56,872 INFO L124 PetriNetUnfolderBase]: 4066/6436 cut-off events. [2024-06-03 19:44:56,873 INFO L125 PetriNetUnfolderBase]: For 1633285/1633289 co-relation queries the response was YES. [2024-06-03 19:44:56,943 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65277 conditions, 6436 events. 4066/6436 cut-off events. For 1633285/1633289 co-relation queries the response was YES. Maximal size of possible extension queue 415. Compared 39236 event pairs, 870 based on Foata normal form. 6/6441 useless extension candidates. Maximal degree in co-relation 65090. Up to 6223 conditions per place. [2024-06-03 19:44:56,970 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 491 selfloop transitions, 37 changer transitions 0/532 dead transitions. [2024-06-03 19:44:56,970 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 408 places, 532 transitions, 6739 flow [2024-06-03 19:44:56,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:44:56,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:44:56,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 131 transitions. [2024-06-03 19:44:56,972 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3808139534883721 [2024-06-03 19:44:56,972 INFO L175 Difference]: Start difference. First operand has 401 places, 521 transitions, 5639 flow. Second operand 8 states and 131 transitions. [2024-06-03 19:44:56,972 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 408 places, 532 transitions, 6739 flow [2024-06-03 19:45:00,796 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 400 places, 532 transitions, 6563 flow, removed 15 selfloop flow, removed 8 redundant places. [2024-06-03 19:45:00,802 INFO L231 Difference]: Finished difference. Result has 401 places, 521 transitions, 5543 flow [2024-06-03 19:45:00,802 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5463, PETRI_DIFFERENCE_MINUEND_PLACES=393, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=521, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=484, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5543, PETRI_PLACES=401, PETRI_TRANSITIONS=521} [2024-06-03 19:45:00,802 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 357 predicate places. [2024-06-03 19:45:00,802 INFO L495 AbstractCegarLoop]: Abstraction has has 401 places, 521 transitions, 5543 flow [2024-06-03 19:45:00,802 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) [2024-06-03 19:45:00,802 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:45:00,803 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:45:00,803 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127 [2024-06-03 19:45:00,803 INFO L420 AbstractCegarLoop]: === Iteration 129 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:45:00,803 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:45:00,803 INFO L85 PathProgramCache]: Analyzing trace with hash -984061338, now seen corresponding path program 4 times [2024-06-03 19:45:00,803 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:45:00,803 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1758827042] [2024-06-03 19:45:00,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:45:00,804 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:45:00,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:45:01,825 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:45:01,825 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:45:01,825 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1758827042] [2024-06-03 19:45:01,825 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1758827042] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:45:01,825 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:45:01,825 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:45:01,825 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1992042207] [2024-06-03 19:45:01,825 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:45:01,826 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:45:01,826 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:45:01,826 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:45:01,826 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:45:01,920 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-03 19:45:01,921 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 401 places, 521 transitions, 5543 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) [2024-06-03 19:45:01,921 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:45:01,921 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-03 19:45:01,921 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:45:03,626 INFO L124 PetriNetUnfolderBase]: 3971/6334 cut-off events. [2024-06-03 19:45:03,626 INFO L125 PetriNetUnfolderBase]: For 1644094/1644094 co-relation queries the response was YES. [2024-06-03 19:45:03,703 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64533 conditions, 6334 events. 3971/6334 cut-off events. For 1644094/1644094 co-relation queries the response was YES. Maximal size of possible extension queue 415. Compared 38953 event pairs, 790 based on Foata normal form. 2/6335 useless extension candidates. Maximal degree in co-relation 64345. Up to 5939 conditions per place. [2024-06-03 19:45:03,732 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 451 selfloop transitions, 48 changer transitions 0/532 dead transitions. [2024-06-03 19:45:03,732 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 408 places, 532 transitions, 6571 flow [2024-06-03 19:45:03,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:45:03,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:45:03,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 138 transitions. [2024-06-03 19:45:03,733 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4011627906976744 [2024-06-03 19:45:03,733 INFO L175 Difference]: Start difference. First operand has 401 places, 521 transitions, 5543 flow. Second operand 8 states and 138 transitions. [2024-06-03 19:45:03,733 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 408 places, 532 transitions, 6571 flow [2024-06-03 19:45:06,989 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 399 places, 532 transitions, 6429 flow, removed 13 selfloop flow, removed 9 redundant places. [2024-06-03 19:45:06,994 INFO L231 Difference]: Finished difference. Result has 400 places, 521 transitions, 5502 flow [2024-06-03 19:45:06,995 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5401, PETRI_DIFFERENCE_MINUEND_PLACES=392, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=521, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=473, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5502, PETRI_PLACES=400, PETRI_TRANSITIONS=521} [2024-06-03 19:45:06,995 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 356 predicate places. [2024-06-03 19:45:06,995 INFO L495 AbstractCegarLoop]: Abstraction has has 400 places, 521 transitions, 5502 flow [2024-06-03 19:45:06,995 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) [2024-06-03 19:45:06,995 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:45:06,995 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:45:06,995 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable128 [2024-06-03 19:45:06,995 INFO L420 AbstractCegarLoop]: === Iteration 130 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:45:06,996 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:45:06,996 INFO L85 PathProgramCache]: Analyzing trace with hash -1433610786, now seen corresponding path program 2 times [2024-06-03 19:45:06,996 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:45:06,996 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2057972346] [2024-06-03 19:45:06,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:45:06,996 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:45:07,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:45:07,854 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:45:07,854 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:45:07,854 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2057972346] [2024-06-03 19:45:07,854 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2057972346] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:45:07,854 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:45:07,854 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:45:07,854 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1399589773] [2024-06-03 19:45:07,854 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:45:07,854 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:45:07,854 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:45:07,855 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:45:07,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:45:07,927 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-03 19:45:07,928 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 400 places, 521 transitions, 5502 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) [2024-06-03 19:45:07,928 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:45:07,928 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-03 19:45:07,928 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:45:09,727 INFO L124 PetriNetUnfolderBase]: 4081/6452 cut-off events. [2024-06-03 19:45:09,728 INFO L125 PetriNetUnfolderBase]: For 1682689/1682689 co-relation queries the response was YES. [2024-06-03 19:45:09,802 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65474 conditions, 6452 events. 4081/6452 cut-off events. For 1682689/1682689 co-relation queries the response was YES. Maximal size of possible extension queue 417. Compared 39239 event pairs, 816 based on Foata normal form. 4/6455 useless extension candidates. Maximal degree in co-relation 65285. Up to 6073 conditions per place. [2024-06-03 19:45:09,830 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 460 selfloop transitions, 79 changer transitions 0/543 dead transitions. [2024-06-03 19:45:09,830 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 408 places, 543 transitions, 7012 flow [2024-06-03 19:45:09,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:45:09,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:45:09,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 158 transitions. [2024-06-03 19:45:09,831 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4082687338501292 [2024-06-03 19:45:09,831 INFO L175 Difference]: Start difference. First operand has 400 places, 521 transitions, 5502 flow. Second operand 9 states and 158 transitions. [2024-06-03 19:45:09,831 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 408 places, 543 transitions, 7012 flow [2024-06-03 19:45:13,652 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 401 places, 543 transitions, 6891 flow, removed 5 selfloop flow, removed 7 redundant places. [2024-06-03 19:45:13,657 INFO L231 Difference]: Finished difference. Result has 402 places, 524 transitions, 5611 flow [2024-06-03 19:45:13,657 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5381, PETRI_DIFFERENCE_MINUEND_PLACES=393, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=521, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=445, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5611, PETRI_PLACES=402, PETRI_TRANSITIONS=524} [2024-06-03 19:45:13,657 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 358 predicate places. [2024-06-03 19:45:13,658 INFO L495 AbstractCegarLoop]: Abstraction has has 402 places, 524 transitions, 5611 flow [2024-06-03 19:45:13,658 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) [2024-06-03 19:45:13,658 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:45:13,658 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:45:13,658 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable129 [2024-06-03 19:45:13,658 INFO L420 AbstractCegarLoop]: === Iteration 131 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:45:13,658 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:45:13,658 INFO L85 PathProgramCache]: Analyzing trace with hash -1034113476, now seen corresponding path program 3 times [2024-06-03 19:45:13,658 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:45:13,658 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [266740934] [2024-06-03 19:45:13,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:45:13,658 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:45:13,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:45:14,539 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:45:14,540 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:45:14,540 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [266740934] [2024-06-03 19:45:14,540 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [266740934] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:45:14,540 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:45:14,540 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:45:14,540 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [573704213] [2024-06-03 19:45:14,540 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:45:14,540 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:45:14,540 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:45:14,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:45:14,540 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:45:14,662 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-03 19:45:14,663 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 402 places, 524 transitions, 5611 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) [2024-06-03 19:45:14,663 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:45:14,663 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-03 19:45:14,663 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:45:16,490 INFO L124 PetriNetUnfolderBase]: 4101/6484 cut-off events. [2024-06-03 19:45:16,490 INFO L125 PetriNetUnfolderBase]: For 1708426/1708426 co-relation queries the response was YES. [2024-06-03 19:45:16,565 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66002 conditions, 6484 events. 4101/6484 cut-off events. For 1708426/1708426 co-relation queries the response was YES. Maximal size of possible extension queue 418. Compared 39469 event pairs, 822 based on Foata normal form. 4/6487 useless extension candidates. Maximal degree in co-relation 65812. Up to 6089 conditions per place. [2024-06-03 19:45:16,592 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 457 selfloop transitions, 85 changer transitions 0/546 dead transitions. [2024-06-03 19:45:16,593 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 410 places, 546 transitions, 7135 flow [2024-06-03 19:45:16,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:45:16,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:45:16,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 157 transitions. [2024-06-03 19:45:16,593 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40568475452196384 [2024-06-03 19:45:16,593 INFO L175 Difference]: Start difference. First operand has 402 places, 524 transitions, 5611 flow. Second operand 9 states and 157 transitions. [2024-06-03 19:45:16,593 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 410 places, 546 transitions, 7135 flow [2024-06-03 19:45:20,365 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 403 places, 546 transitions, 6880 flow, removed 31 selfloop flow, removed 7 redundant places. [2024-06-03 19:45:20,370 INFO L231 Difference]: Finished difference. Result has 404 places, 527 transitions, 5604 flow [2024-06-03 19:45:20,370 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5366, PETRI_DIFFERENCE_MINUEND_PLACES=395, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=524, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=442, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5604, PETRI_PLACES=404, PETRI_TRANSITIONS=527} [2024-06-03 19:45:20,370 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 360 predicate places. [2024-06-03 19:45:20,370 INFO L495 AbstractCegarLoop]: Abstraction has has 404 places, 527 transitions, 5604 flow [2024-06-03 19:45:20,370 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) [2024-06-03 19:45:20,371 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:45:20,371 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:45:20,371 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130 [2024-06-03 19:45:20,371 INFO L420 AbstractCegarLoop]: === Iteration 132 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:45:20,371 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:45:20,371 INFO L85 PathProgramCache]: Analyzing trace with hash -553922732, now seen corresponding path program 4 times [2024-06-03 19:45:20,371 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:45:20,371 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1043803585] [2024-06-03 19:45:20,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:45:20,372 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:45:20,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:45:21,235 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:45:21,235 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:45:21,235 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1043803585] [2024-06-03 19:45:21,235 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1043803585] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:45:21,235 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:45:21,235 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:45:21,235 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1088648141] [2024-06-03 19:45:21,235 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:45:21,235 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:45:21,236 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:45:21,236 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:45:21,236 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:45:21,359 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-03 19:45:21,359 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 404 places, 527 transitions, 5604 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) [2024-06-03 19:45:21,359 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:45:21,359 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-03 19:45:21,359 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:45:23,195 INFO L124 PetriNetUnfolderBase]: 4121/6512 cut-off events. [2024-06-03 19:45:23,196 INFO L125 PetriNetUnfolderBase]: For 1732104/1732104 co-relation queries the response was YES. [2024-06-03 19:45:23,271 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66299 conditions, 6512 events. 4121/6512 cut-off events. For 1732104/1732104 co-relation queries the response was YES. Maximal size of possible extension queue 420. Compared 39652 event pairs, 820 based on Foata normal form. 4/6515 useless extension candidates. Maximal degree in co-relation 66108. Up to 6105 conditions per place. [2024-06-03 19:45:23,299 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 452 selfloop transitions, 92 changer transitions 0/548 dead transitions. [2024-06-03 19:45:23,299 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 412 places, 548 transitions, 7114 flow [2024-06-03 19:45:23,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:45:23,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:45:23,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 156 transitions. [2024-06-03 19:45:23,300 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40310077519379844 [2024-06-03 19:45:23,300 INFO L175 Difference]: Start difference. First operand has 404 places, 527 transitions, 5604 flow. Second operand 9 states and 156 transitions. [2024-06-03 19:45:23,300 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 412 places, 548 transitions, 7114 flow [2024-06-03 19:45:27,104 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 405 places, 548 transitions, 6859 flow, removed 37 selfloop flow, removed 7 redundant places. [2024-06-03 19:45:27,109 INFO L231 Difference]: Finished difference. Result has 406 places, 530 transitions, 5607 flow [2024-06-03 19:45:27,110 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5367, PETRI_DIFFERENCE_MINUEND_PLACES=397, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=527, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=89, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=438, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5607, PETRI_PLACES=406, PETRI_TRANSITIONS=530} [2024-06-03 19:45:27,110 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 362 predicate places. [2024-06-03 19:45:27,110 INFO L495 AbstractCegarLoop]: Abstraction has has 406 places, 530 transitions, 5607 flow [2024-06-03 19:45:27,110 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) [2024-06-03 19:45:27,110 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:45:27,110 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:45:27,111 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131 [2024-06-03 19:45:27,111 INFO L420 AbstractCegarLoop]: === Iteration 133 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:45:27,111 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:45:27,111 INFO L85 PathProgramCache]: Analyzing trace with hash -583777062, now seen corresponding path program 5 times [2024-06-03 19:45:27,111 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:45:27,111 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [610370242] [2024-06-03 19:45:27,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:45:27,111 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:45:27,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:45:28,018 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:45:28,018 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:45:28,018 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [610370242] [2024-06-03 19:45:28,018 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [610370242] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:45:28,018 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:45:28,018 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:45:28,018 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [715408901] [2024-06-03 19:45:28,018 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:45:28,018 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:45:28,019 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:45:28,019 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:45:28,019 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:45:28,113 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-03 19:45:28,113 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 406 places, 530 transitions, 5607 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) [2024-06-03 19:45:28,113 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:45:28,113 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-03 19:45:28,113 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:45:29,929 INFO L124 PetriNetUnfolderBase]: 4109/6496 cut-off events. [2024-06-03 19:45:29,930 INFO L125 PetriNetUnfolderBase]: For 1720070/1720070 co-relation queries the response was YES. [2024-06-03 19:45:30,012 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65646 conditions, 6496 events. 4109/6496 cut-off events. For 1720070/1720070 co-relation queries the response was YES. Maximal size of possible extension queue 420. Compared 39590 event pairs, 922 based on Foata normal form. 4/6499 useless extension candidates. Maximal degree in co-relation 65454. Up to 6306 conditions per place. [2024-06-03 19:45:30,042 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 516 selfloop transitions, 23 changer transitions 0/543 dead transitions. [2024-06-03 19:45:30,042 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 414 places, 543 transitions, 6735 flow [2024-06-03 19:45:30,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:45:30,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:45:30,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 143 transitions. [2024-06-03 19:45:30,043 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3695090439276486 [2024-06-03 19:45:30,043 INFO L175 Difference]: Start difference. First operand has 406 places, 530 transitions, 5607 flow. Second operand 9 states and 143 transitions. [2024-06-03 19:45:30,043 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 414 places, 543 transitions, 6735 flow [2024-06-03 19:45:33,668 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 406 places, 543 transitions, 6433 flow, removed 39 selfloop flow, removed 8 redundant places. [2024-06-03 19:45:33,674 INFO L231 Difference]: Finished difference. Result has 407 places, 530 transitions, 5358 flow [2024-06-03 19:45:33,674 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5305, PETRI_DIFFERENCE_MINUEND_PLACES=398, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=530, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=507, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5358, PETRI_PLACES=407, PETRI_TRANSITIONS=530} [2024-06-03 19:45:33,674 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 363 predicate places. [2024-06-03 19:45:33,674 INFO L495 AbstractCegarLoop]: Abstraction has has 407 places, 530 transitions, 5358 flow [2024-06-03 19:45:33,674 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) [2024-06-03 19:45:33,674 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:45:33,674 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:45:33,674 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132 [2024-06-03 19:45:33,674 INFO L420 AbstractCegarLoop]: === Iteration 134 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:45:33,675 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:45:33,675 INFO L85 PathProgramCache]: Analyzing trace with hash 1150512890, now seen corresponding path program 1 times [2024-06-03 19:45:33,675 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:45:33,675 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1947216323] [2024-06-03 19:45:33,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:45:33,675 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:45:33,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:45:34,722 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:45:34,722 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:45:34,722 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1947216323] [2024-06-03 19:45:34,722 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1947216323] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:45:34,722 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:45:34,722 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:45:34,722 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2034010440] [2024-06-03 19:45:34,722 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:45:34,722 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:45:34,723 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:45:34,723 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:45:34,723 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:45:34,900 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-03 19:45:34,901 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 407 places, 530 transitions, 5358 flow. Second operand has 10 states, 10 states have (on average 12.7) internal successors, (127), 10 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:45:34,901 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:45:34,901 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-03 19:45:34,901 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:45:36,475 INFO L124 PetriNetUnfolderBase]: 3862/6240 cut-off events. [2024-06-03 19:45:36,475 INFO L125 PetriNetUnfolderBase]: For 1506160/1506160 co-relation queries the response was YES. [2024-06-03 19:45:36,550 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60192 conditions, 6240 events. 3862/6240 cut-off events. For 1506160/1506160 co-relation queries the response was YES. Maximal size of possible extension queue 422. Compared 39329 event pairs, 793 based on Foata normal form. 2/6230 useless extension candidates. Maximal degree in co-relation 60000. Up to 5793 conditions per place. [2024-06-03 19:45:36,580 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 493 selfloop transitions, 29 changer transitions 0/561 dead transitions. [2024-06-03 19:45:36,580 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 416 places, 561 transitions, 6886 flow [2024-06-03 19:45:36,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 19:45:36,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 19:45:36,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 186 transitions. [2024-06-03 19:45:36,581 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4325581395348837 [2024-06-03 19:45:36,581 INFO L175 Difference]: Start difference. First operand has 407 places, 530 transitions, 5358 flow. Second operand 10 states and 186 transitions. [2024-06-03 19:45:36,581 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 416 places, 561 transitions, 6886 flow [2024-06-03 19:45:42,111 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 403 places, 561 transitions, 6688 flow, removed 7 selfloop flow, removed 13 redundant places. [2024-06-03 19:45:42,116 INFO L231 Difference]: Finished difference. Result has 404 places, 534 transitions, 5359 flow [2024-06-03 19:45:42,116 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5160, PETRI_DIFFERENCE_MINUEND_PLACES=394, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=530, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=503, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5359, PETRI_PLACES=404, PETRI_TRANSITIONS=534} [2024-06-03 19:45:42,117 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 360 predicate places. [2024-06-03 19:45:42,117 INFO L495 AbstractCegarLoop]: Abstraction has has 404 places, 534 transitions, 5359 flow [2024-06-03 19:45:42,117 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.7) internal successors, (127), 10 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:45:42,117 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:45:42,117 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:45:42,117 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable133 [2024-06-03 19:45:42,117 INFO L420 AbstractCegarLoop]: === Iteration 135 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:45:42,117 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:45:42,117 INFO L85 PathProgramCache]: Analyzing trace with hash 650652956, now seen corresponding path program 1 times [2024-06-03 19:45:42,117 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:45:42,117 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [540186415] [2024-06-03 19:45:42,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:45:42,117 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:45:42,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:45:43,124 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:45:43,124 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:45:43,124 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [540186415] [2024-06-03 19:45:43,124 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [540186415] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:45:43,124 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:45:43,124 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:45:43,124 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1872199657] [2024-06-03 19:45:43,124 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:45:43,124 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:45:43,124 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:45:43,125 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:45:43,125 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:45:43,218 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-03 19:45:43,218 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 404 places, 534 transitions, 5359 flow. Second operand has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:45:43,218 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:45:43,218 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-03 19:45:43,218 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:45:44,796 INFO L124 PetriNetUnfolderBase]: 3970/6356 cut-off events. [2024-06-03 19:45:44,796 INFO L125 PetriNetUnfolderBase]: For 1520787/1520787 co-relation queries the response was YES. [2024-06-03 19:45:44,874 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60794 conditions, 6356 events. 3970/6356 cut-off events. For 1520787/1520787 co-relation queries the response was YES. Maximal size of possible extension queue 424. Compared 39575 event pairs, 855 based on Foata normal form. 1/6345 useless extension candidates. Maximal degree in co-relation 60604. Up to 6071 conditions per place. [2024-06-03 19:45:44,902 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 521 selfloop transitions, 31 changer transitions 0/562 dead transitions. [2024-06-03 19:45:44,902 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 413 places, 562 transitions, 6949 flow [2024-06-03 19:45:44,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 19:45:44,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 19:45:44,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 175 transitions. [2024-06-03 19:45:44,903 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4069767441860465 [2024-06-03 19:45:44,903 INFO L175 Difference]: Start difference. First operand has 404 places, 534 transitions, 5359 flow. Second operand 10 states and 175 transitions. [2024-06-03 19:45:44,903 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 413 places, 562 transitions, 6949 flow [2024-06-03 19:45:49,272 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 407 places, 562 transitions, 6830 flow, removed 45 selfloop flow, removed 6 redundant places. [2024-06-03 19:45:49,277 INFO L231 Difference]: Finished difference. Result has 408 places, 540 transitions, 5462 flow [2024-06-03 19:45:49,277 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5240, PETRI_DIFFERENCE_MINUEND_PLACES=398, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=534, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=506, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5462, PETRI_PLACES=408, PETRI_TRANSITIONS=540} [2024-06-03 19:45:49,278 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 364 predicate places. [2024-06-03 19:45:49,278 INFO L495 AbstractCegarLoop]: Abstraction has has 408 places, 540 transitions, 5462 flow [2024-06-03 19:45:49,278 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:45:49,278 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:45:49,278 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:45:49,278 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable134 [2024-06-03 19:45:49,278 INFO L420 AbstractCegarLoop]: === Iteration 136 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:45:49,278 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:45:49,278 INFO L85 PathProgramCache]: Analyzing trace with hash 650652832, now seen corresponding path program 2 times [2024-06-03 19:45:49,278 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:45:49,279 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [33356942] [2024-06-03 19:45:49,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:45:49,279 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:45:49,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:45:50,327 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:45:50,327 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:45:50,327 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [33356942] [2024-06-03 19:45:50,327 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [33356942] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:45:50,327 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:45:50,327 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:45:50,327 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1333972809] [2024-06-03 19:45:50,327 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:45:50,327 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:45:50,328 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:45:50,328 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:45:50,328 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:45:50,442 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-03 19:45:50,442 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 408 places, 540 transitions, 5462 flow. Second operand has 10 states, 10 states have (on average 12.7) internal successors, (127), 10 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:45:50,442 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:45:50,442 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-03 19:45:50,442 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:45:52,190 INFO L124 PetriNetUnfolderBase]: 3898/6288 cut-off events. [2024-06-03 19:45:52,190 INFO L125 PetriNetUnfolderBase]: For 1560092/1560092 co-relation queries the response was YES. [2024-06-03 19:45:52,257 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60960 conditions, 6288 events. 3898/6288 cut-off events. For 1560092/1560092 co-relation queries the response was YES. Maximal size of possible extension queue 425. Compared 39598 event pairs, 833 based on Foata normal form. 2/6278 useless extension candidates. Maximal degree in co-relation 60768. Up to 5864 conditions per place. [2024-06-03 19:45:52,283 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 497 selfloop transitions, 26 changer transitions 0/564 dead transitions. [2024-06-03 19:45:52,283 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 417 places, 564 transitions, 6620 flow [2024-06-03 19:45:52,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 19:45:52,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 19:45:52,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 181 transitions. [2024-06-03 19:45:52,284 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42093023255813955 [2024-06-03 19:45:52,284 INFO L175 Difference]: Start difference. First operand has 408 places, 540 transitions, 5462 flow. Second operand 10 states and 181 transitions. [2024-06-03 19:45:52,284 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 417 places, 564 transitions, 6620 flow [2024-06-03 19:45:56,943 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 411 places, 564 transitions, 6507 flow, removed 44 selfloop flow, removed 6 redundant places. [2024-06-03 19:45:56,948 INFO L231 Difference]: Finished difference. Result has 412 places, 542 transitions, 5452 flow [2024-06-03 19:45:56,948 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5349, PETRI_DIFFERENCE_MINUEND_PLACES=402, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=540, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=514, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5452, PETRI_PLACES=412, PETRI_TRANSITIONS=542} [2024-06-03 19:45:56,949 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 368 predicate places. [2024-06-03 19:45:56,949 INFO L495 AbstractCegarLoop]: Abstraction has has 412 places, 542 transitions, 5452 flow [2024-06-03 19:45:56,949 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.7) internal successors, (127), 10 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:45:56,949 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:45:56,949 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:45:56,949 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable135 [2024-06-03 19:45:56,949 INFO L420 AbstractCegarLoop]: === Iteration 137 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:45:56,949 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:45:56,949 INFO L85 PathProgramCache]: Analyzing trace with hash 653449466, now seen corresponding path program 2 times [2024-06-03 19:45:56,949 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:45:56,949 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1868043170] [2024-06-03 19:45:56,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:45:56,949 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:45:56,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:45:57,970 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:45:57,970 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:45:57,970 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1868043170] [2024-06-03 19:45:57,970 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1868043170] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:45:57,970 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:45:57,970 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:45:57,970 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [919418738] [2024-06-03 19:45:57,970 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:45:57,970 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:45:57,971 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:45:57,971 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:45:57,971 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:45:58,102 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-03 19:45:58,102 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 412 places, 542 transitions, 5452 flow. Second operand has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:45:58,102 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:45:58,102 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-03 19:45:58,102 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:45:59,778 INFO L124 PetriNetUnfolderBase]: 3983/6375 cut-off events. [2024-06-03 19:45:59,779 INFO L125 PetriNetUnfolderBase]: For 1568549/1568549 co-relation queries the response was YES. [2024-06-03 19:45:59,851 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61573 conditions, 6375 events. 3983/6375 cut-off events. For 1568549/1568549 co-relation queries the response was YES. Maximal size of possible extension queue 426. Compared 39698 event pairs, 855 based on Foata normal form. 1/6364 useless extension candidates. Maximal degree in co-relation 61379. Up to 6104 conditions per place. [2024-06-03 19:45:59,878 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 527 selfloop transitions, 26 changer transitions 0/563 dead transitions. [2024-06-03 19:45:59,878 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 420 places, 563 transitions, 6946 flow [2024-06-03 19:45:59,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:45:59,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:45:59,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 157 transitions. [2024-06-03 19:45:59,879 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40568475452196384 [2024-06-03 19:45:59,879 INFO L175 Difference]: Start difference. First operand has 412 places, 542 transitions, 5452 flow. Second operand 9 states and 157 transitions. [2024-06-03 19:45:59,879 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 420 places, 563 transitions, 6946 flow [2024-06-03 19:46:05,274 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 412 places, 563 transitions, 6863 flow, removed 17 selfloop flow, removed 8 redundant places. [2024-06-03 19:46:05,279 INFO L231 Difference]: Finished difference. Result has 413 places, 545 transitions, 5487 flow [2024-06-03 19:46:05,279 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5369, PETRI_DIFFERENCE_MINUEND_PLACES=404, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=542, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=519, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5487, PETRI_PLACES=413, PETRI_TRANSITIONS=545} [2024-06-03 19:46:05,280 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 369 predicate places. [2024-06-03 19:46:05,280 INFO L495 AbstractCegarLoop]: Abstraction has has 413 places, 545 transitions, 5487 flow [2024-06-03 19:46:05,280 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:46:05,280 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:46:05,280 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:46:05,280 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable136 [2024-06-03 19:46:05,280 INFO L420 AbstractCegarLoop]: === Iteration 138 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:46:05,281 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:46:05,281 INFO L85 PathProgramCache]: Analyzing trace with hash 1600549844, now seen corresponding path program 3 times [2024-06-03 19:46:05,281 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:46:05,281 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1692147812] [2024-06-03 19:46:05,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:46:05,281 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:46:05,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:46:06,351 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:46:06,351 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:46:06,351 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1692147812] [2024-06-03 19:46:06,351 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1692147812] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:46:06,351 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:46:06,351 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:46:06,351 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1859593913] [2024-06-03 19:46:06,351 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:46:06,351 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:46:06,351 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:46:06,352 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:46:06,352 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:46:06,481 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-03 19:46:06,482 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 413 places, 545 transitions, 5487 flow. Second operand has 10 states, 10 states have (on average 12.7) internal successors, (127), 10 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:46:06,482 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:46:06,482 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-03 19:46:06,482 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:46:08,062 INFO L124 PetriNetUnfolderBase]: 3898/6288 cut-off events. [2024-06-03 19:46:08,062 INFO L125 PetriNetUnfolderBase]: For 1584521/1584521 co-relation queries the response was YES. [2024-06-03 19:46:08,139 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60935 conditions, 6288 events. 3898/6288 cut-off events. For 1584521/1584521 co-relation queries the response was YES. Maximal size of possible extension queue 426. Compared 39585 event pairs, 832 based on Foata normal form. 2/6278 useless extension candidates. Maximal degree in co-relation 60740. Up to 5874 conditions per place. [2024-06-03 19:46:08,168 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 501 selfloop transitions, 20 changer transitions 0/563 dead transitions. [2024-06-03 19:46:08,168 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 421 places, 563 transitions, 6585 flow [2024-06-03 19:46:08,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:46:08,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:46:08,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 162 transitions. [2024-06-03 19:46:08,169 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4186046511627907 [2024-06-03 19:46:08,169 INFO L175 Difference]: Start difference. First operand has 413 places, 545 transitions, 5487 flow. Second operand 9 states and 162 transitions. [2024-06-03 19:46:08,169 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 421 places, 563 transitions, 6585 flow [2024-06-03 19:46:12,957 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 414 places, 563 transitions, 6447 flow, removed 42 selfloop flow, removed 7 redundant places. [2024-06-03 19:46:12,963 INFO L231 Difference]: Finished difference. Result has 415 places, 545 transitions, 5394 flow [2024-06-03 19:46:12,963 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5349, PETRI_DIFFERENCE_MINUEND_PLACES=406, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=545, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=525, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5394, PETRI_PLACES=415, PETRI_TRANSITIONS=545} [2024-06-03 19:46:12,963 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 371 predicate places. [2024-06-03 19:46:12,963 INFO L495 AbstractCegarLoop]: Abstraction has has 415 places, 545 transitions, 5394 flow [2024-06-03 19:46:12,963 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.7) internal successors, (127), 10 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:46:12,964 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:46:12,964 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:46:12,964 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137 [2024-06-03 19:46:12,964 INFO L420 AbstractCegarLoop]: === Iteration 139 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:46:12,964 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:46:12,964 INFO L85 PathProgramCache]: Analyzing trace with hash 653454116, now seen corresponding path program 3 times [2024-06-03 19:46:12,964 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:46:12,964 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [186957832] [2024-06-03 19:46:12,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:46:12,965 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:46:12,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:46:13,995 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:46:13,995 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:46:13,995 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [186957832] [2024-06-03 19:46:13,995 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [186957832] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:46:13,995 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:46:13,995 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:46:13,995 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1761059799] [2024-06-03 19:46:13,996 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:46:13,996 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:46:13,996 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:46:13,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:46:13,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:46:14,138 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-03 19:46:14,138 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 415 places, 545 transitions, 5394 flow. Second operand has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:46:14,138 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:46:14,138 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-03 19:46:14,138 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:46:15,682 INFO L124 PetriNetUnfolderBase]: 3975/6364 cut-off events. [2024-06-03 19:46:15,683 INFO L125 PetriNetUnfolderBase]: For 1582393/1582393 co-relation queries the response was YES. [2024-06-03 19:46:15,758 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61199 conditions, 6364 events. 3975/6364 cut-off events. For 1582393/1582393 co-relation queries the response was YES. Maximal size of possible extension queue 426. Compared 39617 event pairs, 854 based on Foata normal form. 1/6353 useless extension candidates. Maximal degree in co-relation 61003. Up to 6100 conditions per place. [2024-06-03 19:46:15,784 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 531 selfloop transitions, 21 changer transitions 0/562 dead transitions. [2024-06-03 19:46:15,784 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 423 places, 562 transitions, 6552 flow [2024-06-03 19:46:15,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:46:15,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:46:15,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 154 transitions. [2024-06-03 19:46:15,785 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3979328165374677 [2024-06-03 19:46:15,785 INFO L175 Difference]: Start difference. First operand has 415 places, 545 transitions, 5394 flow. Second operand 9 states and 154 transitions. [2024-06-03 19:46:15,785 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 423 places, 562 transitions, 6552 flow [2024-06-03 19:46:21,256 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 415 places, 562 transitions, 6462 flow, removed 22 selfloop flow, removed 8 redundant places. [2024-06-03 19:46:21,261 INFO L231 Difference]: Finished difference. Result has 416 places, 545 transitions, 5352 flow [2024-06-03 19:46:21,261 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5304, PETRI_DIFFERENCE_MINUEND_PLACES=407, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=545, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=524, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5352, PETRI_PLACES=416, PETRI_TRANSITIONS=545} [2024-06-03 19:46:21,262 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 372 predicate places. [2024-06-03 19:46:21,262 INFO L495 AbstractCegarLoop]: Abstraction has has 416 places, 545 transitions, 5352 flow [2024-06-03 19:46:21,262 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:46:21,262 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:46:21,262 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:46:21,262 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable138 [2024-06-03 19:46:21,262 INFO L420 AbstractCegarLoop]: === Iteration 140 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:46:21,262 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:46:21,262 INFO L85 PathProgramCache]: Analyzing trace with hash 1600554804, now seen corresponding path program 1 times [2024-06-03 19:46:21,262 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:46:21,262 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [702346808] [2024-06-03 19:46:21,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:46:21,262 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:46:21,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:46:22,215 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:46:22,216 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:46:22,216 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [702346808] [2024-06-03 19:46:22,216 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [702346808] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:46:22,216 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:46:22,216 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:46:22,216 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [571495986] [2024-06-03 19:46:22,216 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:46:22,216 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:46:22,216 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:46:22,216 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:46:22,216 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:46:22,309 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-03 19:46:22,309 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 416 places, 545 transitions, 5352 flow. Second operand has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:46:22,309 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:46:22,309 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-03 19:46:22,309 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:46:23,844 INFO L124 PetriNetUnfolderBase]: 3985/6380 cut-off events. [2024-06-03 19:46:23,845 INFO L125 PetriNetUnfolderBase]: For 1614169/1614169 co-relation queries the response was YES. [2024-06-03 19:46:23,925 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61487 conditions, 6380 events. 3985/6380 cut-off events. For 1614169/1614169 co-relation queries the response was YES. Maximal size of possible extension queue 427. Compared 39794 event pairs, 853 based on Foata normal form. 2/6370 useless extension candidates. Maximal degree in co-relation 61290. Up to 6111 conditions per place. [2024-06-03 19:46:23,956 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 535 selfloop transitions, 21 changer transitions 0/566 dead transitions. [2024-06-03 19:46:23,956 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 424 places, 566 transitions, 6606 flow [2024-06-03 19:46:23,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:46:23,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:46:23,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 155 transitions. [2024-06-03 19:46:23,956 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4005167958656331 [2024-06-03 19:46:23,957 INFO L175 Difference]: Start difference. First operand has 416 places, 545 transitions, 5352 flow. Second operand 9 states and 155 transitions. [2024-06-03 19:46:23,957 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 424 places, 566 transitions, 6606 flow [2024-06-03 19:46:29,942 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 416 places, 566 transitions, 6554 flow, removed 3 selfloop flow, removed 8 redundant places. [2024-06-03 19:46:29,947 INFO L231 Difference]: Finished difference. Result has 417 places, 548 transitions, 5438 flow [2024-06-03 19:46:29,948 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5300, PETRI_DIFFERENCE_MINUEND_PLACES=408, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=545, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=524, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5438, PETRI_PLACES=417, PETRI_TRANSITIONS=548} [2024-06-03 19:46:29,948 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 373 predicate places. [2024-06-03 19:46:29,948 INFO L495 AbstractCegarLoop]: Abstraction has has 417 places, 548 transitions, 5438 flow [2024-06-03 19:46:29,948 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:46:29,948 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:46:29,948 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:46:29,948 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable139 [2024-06-03 19:46:29,949 INFO L420 AbstractCegarLoop]: === Iteration 141 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:46:29,949 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:46:29,949 INFO L85 PathProgramCache]: Analyzing trace with hash -1092989932, now seen corresponding path program 4 times [2024-06-03 19:46:29,949 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:46:29,949 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [455999169] [2024-06-03 19:46:29,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:46:29,950 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:46:29,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:46:30,939 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:46:30,939 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:46:30,939 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [455999169] [2024-06-03 19:46:30,939 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [455999169] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:46:30,939 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:46:30,940 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:46:30,940 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1407826403] [2024-06-03 19:46:30,940 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:46:30,940 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:46:30,940 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:46:30,940 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:46:30,940 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:46:31,070 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-03 19:46:31,070 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 417 places, 548 transitions, 5438 flow. Second operand has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:46:31,070 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:46:31,070 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-03 19:46:31,070 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:46:32,600 INFO L124 PetriNetUnfolderBase]: 3998/6398 cut-off events. [2024-06-03 19:46:32,600 INFO L125 PetriNetUnfolderBase]: For 1635383/1635383 co-relation queries the response was YES. [2024-06-03 19:46:32,679 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62258 conditions, 6398 events. 3998/6398 cut-off events. For 1635383/1635383 co-relation queries the response was YES. Maximal size of possible extension queue 429. Compared 39889 event pairs, 855 based on Foata normal form. 1/6387 useless extension candidates. Maximal degree in co-relation 62060. Up to 6081 conditions per place. [2024-06-03 19:46:32,708 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 501 selfloop transitions, 58 changer transitions 0/569 dead transitions. [2024-06-03 19:46:32,708 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 425 places, 569 transitions, 7044 flow [2024-06-03 19:46:32,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:46:32,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:46:32,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 161 transitions. [2024-06-03 19:46:32,708 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4160206718346253 [2024-06-03 19:46:32,708 INFO L175 Difference]: Start difference. First operand has 417 places, 548 transitions, 5438 flow. Second operand 9 states and 161 transitions. [2024-06-03 19:46:32,708 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 425 places, 569 transitions, 7044 flow [2024-06-03 19:46:38,698 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 418 places, 569 transitions, 6928 flow, removed 39 selfloop flow, removed 7 redundant places. [2024-06-03 19:46:38,703 INFO L231 Difference]: Finished difference. Result has 419 places, 554 transitions, 5614 flow [2024-06-03 19:46:38,703 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5322, PETRI_DIFFERENCE_MINUEND_PLACES=410, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=548, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=493, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5614, PETRI_PLACES=419, PETRI_TRANSITIONS=554} [2024-06-03 19:46:38,703 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 375 predicate places. [2024-06-03 19:46:38,703 INFO L495 AbstractCegarLoop]: Abstraction has has 419 places, 554 transitions, 5614 flow [2024-06-03 19:46:38,703 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:46:38,703 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:46:38,703 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:46:38,704 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140 [2024-06-03 19:46:38,704 INFO L420 AbstractCegarLoop]: === Iteration 142 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:46:38,704 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:46:38,704 INFO L85 PathProgramCache]: Analyzing trace with hash -1092990056, now seen corresponding path program 4 times [2024-06-03 19:46:38,704 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:46:38,704 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1680092117] [2024-06-03 19:46:38,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:46:38,704 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:46:38,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:46:39,841 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:46:39,841 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:46:39,841 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1680092117] [2024-06-03 19:46:39,841 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1680092117] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:46:39,841 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:46:39,841 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:46:39,842 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2123287925] [2024-06-03 19:46:39,842 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:46:39,842 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:46:39,842 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:46:39,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:46:39,842 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:46:39,969 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-03 19:46:39,969 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 419 places, 554 transitions, 5614 flow. Second operand has 10 states, 10 states have (on average 12.7) internal successors, (127), 10 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:46:39,969 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:46:39,969 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-03 19:46:39,969 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:46:41,589 INFO L124 PetriNetUnfolderBase]: 3925/6329 cut-off events. [2024-06-03 19:46:41,589 INFO L125 PetriNetUnfolderBase]: For 1676529/1676529 co-relation queries the response was YES. [2024-06-03 19:46:41,664 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62544 conditions, 6329 events. 3925/6329 cut-off events. For 1676529/1676529 co-relation queries the response was YES. Maximal size of possible extension queue 430. Compared 39847 event pairs, 832 based on Foata normal form. 2/6319 useless extension candidates. Maximal degree in co-relation 62345. Up to 5894 conditions per place. [2024-06-03 19:46:41,690 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 495 selfloop transitions, 32 changer transitions 0/571 dead transitions. [2024-06-03 19:46:41,691 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 427 places, 571 transitions, 6788 flow [2024-06-03 19:46:41,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:46:41,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:46:41,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 163 transitions. [2024-06-03 19:46:41,691 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42118863049095606 [2024-06-03 19:46:41,691 INFO L175 Difference]: Start difference. First operand has 419 places, 554 transitions, 5614 flow. Second operand 9 states and 163 transitions. [2024-06-03 19:46:41,691 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 427 places, 571 transitions, 6788 flow [2024-06-03 19:46:47,488 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 422 places, 571 transitions, 6619 flow, removed 56 selfloop flow, removed 5 redundant places. [2024-06-03 19:46:47,494 INFO L231 Difference]: Finished difference. Result has 423 places, 556 transitions, 5594 flow [2024-06-03 19:46:47,494 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5445, PETRI_DIFFERENCE_MINUEND_PLACES=414, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=554, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=522, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5594, PETRI_PLACES=423, PETRI_TRANSITIONS=556} [2024-06-03 19:46:47,494 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 379 predicate places. [2024-06-03 19:46:47,494 INFO L495 AbstractCegarLoop]: Abstraction has has 423 places, 556 transitions, 5594 flow [2024-06-03 19:46:47,495 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.7) internal successors, (127), 10 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:46:47,495 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:46:47,495 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:46:47,495 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141 [2024-06-03 19:46:47,495 INFO L420 AbstractCegarLoop]: === Iteration 143 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:46:47,495 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:46:47,495 INFO L85 PathProgramCache]: Analyzing trace with hash -1092985096, now seen corresponding path program 2 times [2024-06-03 19:46:47,495 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:46:47,495 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1400456555] [2024-06-03 19:46:47,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:46:47,496 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:46:47,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:46:48,395 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:46:48,395 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:46:48,395 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1400456555] [2024-06-03 19:46:48,395 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1400456555] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:46:48,395 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:46:48,395 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:46:48,395 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1291358675] [2024-06-03 19:46:48,395 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:46:48,395 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:46:48,395 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:46:48,396 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:46:48,396 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:46:48,494 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-03 19:46:48,494 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 423 places, 556 transitions, 5594 flow. Second operand has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:46:48,495 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:46:48,495 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-03 19:46:48,495 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:46:50,092 INFO L124 PetriNetUnfolderBase]: 4067/6501 cut-off events. [2024-06-03 19:46:50,092 INFO L125 PetriNetUnfolderBase]: For 1739807/1739807 co-relation queries the response was YES. [2024-06-03 19:46:50,173 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64864 conditions, 6501 events. 4067/6501 cut-off events. For 1739807/1739807 co-relation queries the response was YES. Maximal size of possible extension queue 435. Compared 40534 event pairs, 863 based on Foata normal form. 2/6491 useless extension candidates. Maximal degree in co-relation 64663. Up to 6106 conditions per place. [2024-06-03 19:46:50,203 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 508 selfloop transitions, 67 changer transitions 0/585 dead transitions. [2024-06-03 19:46:50,204 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 431 places, 585 transitions, 7656 flow [2024-06-03 19:46:50,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:46:50,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:46:50,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 169 transitions. [2024-06-03 19:46:50,204 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43669250645994834 [2024-06-03 19:46:50,204 INFO L175 Difference]: Start difference. First operand has 423 places, 556 transitions, 5594 flow. Second operand 9 states and 169 transitions. [2024-06-03 19:46:50,204 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 431 places, 585 transitions, 7656 flow [2024-06-03 19:46:56,075 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 424 places, 585 transitions, 7523 flow, removed 36 selfloop flow, removed 7 redundant places. [2024-06-03 19:46:56,081 INFO L231 Difference]: Finished difference. Result has 425 places, 565 transitions, 5889 flow [2024-06-03 19:46:56,081 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5461, PETRI_DIFFERENCE_MINUEND_PLACES=416, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=556, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=495, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5889, PETRI_PLACES=425, PETRI_TRANSITIONS=565} [2024-06-03 19:46:56,082 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 381 predicate places. [2024-06-03 19:46:56,082 INFO L495 AbstractCegarLoop]: Abstraction has has 425 places, 565 transitions, 5889 flow [2024-06-03 19:46:56,082 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:46:56,082 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:46:56,082 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:46:56,082 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142 [2024-06-03 19:46:56,082 INFO L420 AbstractCegarLoop]: === Iteration 144 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:46:56,082 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:46:56,082 INFO L85 PathProgramCache]: Analyzing trace with hash 768745286, now seen corresponding path program 5 times [2024-06-03 19:46:56,082 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:46:56,082 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1165958381] [2024-06-03 19:46:56,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:46:56,082 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:46:56,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:46:57,107 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:46:57,107 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:46:57,107 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1165958381] [2024-06-03 19:46:57,107 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1165958381] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:46:57,107 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:46:57,107 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:46:57,107 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1746771185] [2024-06-03 19:46:57,107 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:46:57,107 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:46:57,108 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:46:57,108 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:46:57,108 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:46:57,219 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-03 19:46:57,219 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 425 places, 565 transitions, 5889 flow. Second operand has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:46:57,219 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:46:57,219 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-03 19:46:57,219 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:46:58,884 INFO L124 PetriNetUnfolderBase]: 4040/6461 cut-off events. [2024-06-03 19:46:58,884 INFO L125 PetriNetUnfolderBase]: For 1741617/1741617 co-relation queries the response was YES. [2024-06-03 19:46:58,971 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64676 conditions, 6461 events. 4040/6461 cut-off events. For 1741617/1741617 co-relation queries the response was YES. Maximal size of possible extension queue 435. Compared 40296 event pairs, 859 based on Foata normal form. 1/6448 useless extension candidates. Maximal degree in co-relation 64474. Up to 6151 conditions per place. [2024-06-03 19:46:59,002 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 519 selfloop transitions, 53 changer transitions 0/582 dead transitions. [2024-06-03 19:46:59,003 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 433 places, 582 transitions, 7127 flow [2024-06-03 19:46:59,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:46:59,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:46:59,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 159 transitions. [2024-06-03 19:46:59,003 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4108527131782946 [2024-06-03 19:46:59,003 INFO L175 Difference]: Start difference. First operand has 425 places, 565 transitions, 5889 flow. Second operand 9 states and 159 transitions. [2024-06-03 19:46:59,003 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 433 places, 582 transitions, 7127 flow [2024-06-03 19:47:05,822 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 429 places, 582 transitions, 6986 flow, removed 53 selfloop flow, removed 4 redundant places. [2024-06-03 19:47:05,827 INFO L231 Difference]: Finished difference. Result has 430 places, 568 transitions, 5918 flow [2024-06-03 19:47:05,828 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5748, PETRI_DIFFERENCE_MINUEND_PLACES=421, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=565, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=512, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5918, PETRI_PLACES=430, PETRI_TRANSITIONS=568} [2024-06-03 19:47:05,828 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 386 predicate places. [2024-06-03 19:47:05,828 INFO L495 AbstractCegarLoop]: Abstraction has has 430 places, 568 transitions, 5918 flow [2024-06-03 19:47:05,828 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:47:05,828 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:47:05,828 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:47:05,828 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143 [2024-06-03 19:47:05,829 INFO L420 AbstractCegarLoop]: === Iteration 145 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:47:05,829 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:47:05,829 INFO L85 PathProgramCache]: Analyzing trace with hash 768924962, now seen corresponding path program 3 times [2024-06-03 19:47:05,829 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:47:05,829 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1858425213] [2024-06-03 19:47:05,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:47:05,829 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:47:05,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:47:06,715 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:47:06,715 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:47:06,715 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1858425213] [2024-06-03 19:47:06,715 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1858425213] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:47:06,715 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:47:06,715 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:47:06,715 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [25006783] [2024-06-03 19:47:06,715 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:47:06,715 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:47:06,716 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:47:06,716 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:47:06,716 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:47:06,819 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-03 19:47:06,819 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 430 places, 568 transitions, 5918 flow. Second operand has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:47:06,819 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:47:06,819 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-03 19:47:06,819 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:47:08,469 INFO L124 PetriNetUnfolderBase]: 4055/6482 cut-off events. [2024-06-03 19:47:08,469 INFO L125 PetriNetUnfolderBase]: For 1774122/1774122 co-relation queries the response was YES. [2024-06-03 19:47:08,550 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64956 conditions, 6482 events. 4055/6482 cut-off events. For 1774122/1774122 co-relation queries the response was YES. Maximal size of possible extension queue 437. Compared 40403 event pairs, 858 based on Foata normal form. 2/6472 useless extension candidates. Maximal degree in co-relation 64752. Up to 6087 conditions per place. [2024-06-03 19:47:08,580 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 507 selfloop transitions, 73 changer transitions 0/590 dead transitions. [2024-06-03 19:47:08,580 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 438 places, 590 transitions, 7796 flow [2024-06-03 19:47:08,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:47:08,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:47:08,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 166 transitions. [2024-06-03 19:47:08,581 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4289405684754522 [2024-06-03 19:47:08,581 INFO L175 Difference]: Start difference. First operand has 430 places, 568 transitions, 5918 flow. Second operand 9 states and 166 transitions. [2024-06-03 19:47:08,581 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 438 places, 590 transitions, 7796 flow [2024-06-03 19:47:15,554 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 431 places, 590 transitions, 7654 flow, removed 20 selfloop flow, removed 7 redundant places. [2024-06-03 19:47:15,560 INFO L231 Difference]: Finished difference. Result has 432 places, 571 transitions, 6012 flow [2024-06-03 19:47:15,560 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5776, PETRI_DIFFERENCE_MINUEND_PLACES=423, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=568, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=498, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6012, PETRI_PLACES=432, PETRI_TRANSITIONS=571} [2024-06-03 19:47:15,560 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 388 predicate places. [2024-06-03 19:47:15,560 INFO L495 AbstractCegarLoop]: Abstraction has has 432 places, 571 transitions, 6012 flow [2024-06-03 19:47:15,561 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:47:15,561 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:47:15,561 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:47:15,561 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable144 [2024-06-03 19:47:15,561 INFO L420 AbstractCegarLoop]: === Iteration 146 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:47:15,561 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:47:15,561 INFO L85 PathProgramCache]: Analyzing trace with hash -1092812302, now seen corresponding path program 6 times [2024-06-03 19:47:15,561 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:47:15,561 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1273913561] [2024-06-03 19:47:15,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:47:15,561 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:47:15,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:47:16,570 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:47:16,571 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:47:16,571 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1273913561] [2024-06-03 19:47:16,571 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1273913561] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:47:16,571 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:47:16,571 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:47:16,571 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2005820669] [2024-06-03 19:47:16,571 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:47:16,571 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:47:16,571 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:47:16,571 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:47:16,571 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:47:16,650 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-03 19:47:16,650 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 432 places, 571 transitions, 6012 flow. Second operand has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:47:16,650 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:47:16,650 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-03 19:47:16,650 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:47:18,442 INFO L124 PetriNetUnfolderBase]: 4052/6480 cut-off events. [2024-06-03 19:47:18,442 INFO L125 PetriNetUnfolderBase]: For 1776631/1776631 co-relation queries the response was YES. [2024-06-03 19:47:18,515 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64994 conditions, 6480 events. 4052/6480 cut-off events. For 1776631/1776631 co-relation queries the response was YES. Maximal size of possible extension queue 437. Compared 40419 event pairs, 857 based on Foata normal form. 1/6467 useless extension candidates. Maximal degree in co-relation 64789. Up to 6166 conditions per place. [2024-06-03 19:47:18,543 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 521 selfloop transitions, 54 changer transitions 0/585 dead transitions. [2024-06-03 19:47:18,543 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 440 places, 585 transitions, 7204 flow [2024-06-03 19:47:18,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:47:18,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:47:18,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 158 transitions. [2024-06-03 19:47:18,544 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4082687338501292 [2024-06-03 19:47:18,544 INFO L175 Difference]: Start difference. First operand has 432 places, 571 transitions, 6012 flow. Second operand 9 states and 158 transitions. [2024-06-03 19:47:18,544 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 440 places, 585 transitions, 7204 flow [2024-06-03 19:47:25,568 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 435 places, 585 transitions, 6988 flow, removed 60 selfloop flow, removed 5 redundant places. [2024-06-03 19:47:25,573 INFO L231 Difference]: Finished difference. Result has 436 places, 571 transitions, 5910 flow [2024-06-03 19:47:25,573 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5796, PETRI_DIFFERENCE_MINUEND_PLACES=427, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=571, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=517, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5910, PETRI_PLACES=436, PETRI_TRANSITIONS=571} [2024-06-03 19:47:25,574 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 392 predicate places. [2024-06-03 19:47:25,574 INFO L495 AbstractCegarLoop]: Abstraction has has 436 places, 571 transitions, 5910 flow [2024-06-03 19:47:25,574 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:47:25,574 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:47:25,574 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:47:25,574 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable145 [2024-06-03 19:47:25,574 INFO L420 AbstractCegarLoop]: === Iteration 147 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:47:25,575 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:47:25,575 INFO L85 PathProgramCache]: Analyzing trace with hash -1092812116, now seen corresponding path program 4 times [2024-06-03 19:47:25,575 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:47:25,575 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [232115955] [2024-06-03 19:47:25,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:47:25,575 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:47:25,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:47:26,466 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:47:26,466 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:47:26,466 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [232115955] [2024-06-03 19:47:26,466 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [232115955] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:47:26,466 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:47:26,466 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:47:26,466 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1218934022] [2024-06-03 19:47:26,466 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:47:26,466 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:47:26,466 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:47:26,467 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:47:26,467 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:47:26,576 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-03 19:47:26,576 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 436 places, 571 transitions, 5910 flow. Second operand has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:47:26,576 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:47:26,576 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-03 19:47:26,576 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:47:28,235 INFO L124 PetriNetUnfolderBase]: 4046/6470 cut-off events. [2024-06-03 19:47:28,235 INFO L125 PetriNetUnfolderBase]: For 1787323/1787323 co-relation queries the response was YES. [2024-06-03 19:47:28,313 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64519 conditions, 6470 events. 4046/6470 cut-off events. For 1787323/1787323 co-relation queries the response was YES. Maximal size of possible extension queue 437. Compared 40390 event pairs, 857 based on Foata normal form. 2/6460 useless extension candidates. Maximal degree in co-relation 64313. Up to 6078 conditions per place. [2024-06-03 19:47:28,341 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 509 selfloop transitions, 71 changer transitions 0/590 dead transitions. [2024-06-03 19:47:28,341 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 444 places, 590 transitions, 7422 flow [2024-06-03 19:47:28,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:47:28,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:47:28,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 167 transitions. [2024-06-03 19:47:28,342 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4315245478036176 [2024-06-03 19:47:28,342 INFO L175 Difference]: Start difference. First operand has 436 places, 571 transitions, 5910 flow. Second operand 9 states and 167 transitions. [2024-06-03 19:47:28,342 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 444 places, 590 transitions, 7422 flow [2024-06-03 19:47:35,873 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 436 places, 590 transitions, 7236 flow, removed 35 selfloop flow, removed 8 redundant places. [2024-06-03 19:47:35,879 INFO L231 Difference]: Finished difference. Result has 437 places, 571 transitions, 5872 flow [2024-06-03 19:47:35,879 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5724, PETRI_DIFFERENCE_MINUEND_PLACES=428, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=571, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=500, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5872, PETRI_PLACES=437, PETRI_TRANSITIONS=571} [2024-06-03 19:47:35,879 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 393 predicate places. [2024-06-03 19:47:35,879 INFO L495 AbstractCegarLoop]: Abstraction has has 437 places, 571 transitions, 5872 flow [2024-06-03 19:47:35,879 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:47:35,879 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:47:35,880 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:47:35,880 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable146 [2024-06-03 19:47:35,880 INFO L420 AbstractCegarLoop]: === Iteration 148 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:47:35,880 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:47:35,880 INFO L85 PathProgramCache]: Analyzing trace with hash -1385512860, now seen corresponding path program 7 times [2024-06-03 19:47:35,880 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:47:35,880 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [768041466] [2024-06-03 19:47:35,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:47:35,881 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:47:35,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:47:36,858 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:47:36,859 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:47:36,859 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [768041466] [2024-06-03 19:47:36,859 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [768041466] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:47:36,859 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:47:36,859 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:47:36,859 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1520194220] [2024-06-03 19:47:36,859 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:47:36,859 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:47:36,859 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:47:36,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:47:36,859 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:47:36,956 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-03 19:47:36,956 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 437 places, 571 transitions, 5872 flow. Second operand has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:47:36,956 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:47:36,956 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-03 19:47:36,956 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:47:38,595 INFO L124 PetriNetUnfolderBase]: 4078/6520 cut-off events. [2024-06-03 19:47:38,595 INFO L125 PetriNetUnfolderBase]: For 1812847/1812847 co-relation queries the response was YES. [2024-06-03 19:47:38,679 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65346 conditions, 6520 events. 4078/6520 cut-off events. For 1812847/1812847 co-relation queries the response was YES. Maximal size of possible extension queue 439. Compared 40651 event pairs, 862 based on Foata normal form. 1/6507 useless extension candidates. Maximal degree in co-relation 65139. Up to 6245 conditions per place. [2024-06-03 19:47:38,711 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 541 selfloop transitions, 34 changer transitions 0/585 dead transitions. [2024-06-03 19:47:38,712 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 445 places, 585 transitions, 7144 flow [2024-06-03 19:47:38,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:47:38,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:47:38,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 151 transitions. [2024-06-03 19:47:38,712 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39018087855297157 [2024-06-03 19:47:38,712 INFO L175 Difference]: Start difference. First operand has 437 places, 571 transitions, 5872 flow. Second operand 9 states and 151 transitions. [2024-06-03 19:47:38,712 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 445 places, 585 transitions, 7144 flow [2024-06-03 19:47:45,716 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 436 places, 585 transitions, 6976 flow, removed 0 selfloop flow, removed 9 redundant places. [2024-06-03 19:47:45,722 INFO L231 Difference]: Finished difference. Result has 437 places, 574 transitions, 5876 flow [2024-06-03 19:47:45,722 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5704, PETRI_DIFFERENCE_MINUEND_PLACES=428, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=571, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=537, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5876, PETRI_PLACES=437, PETRI_TRANSITIONS=574} [2024-06-03 19:47:45,723 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 393 predicate places. [2024-06-03 19:47:45,723 INFO L495 AbstractCegarLoop]: Abstraction has has 437 places, 574 transitions, 5876 flow [2024-06-03 19:47:45,723 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:47:45,723 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:47:45,723 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:47:45,723 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable147 [2024-06-03 19:47:45,723 INFO L420 AbstractCegarLoop]: === Iteration 149 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:47:45,723 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:47:45,723 INFO L85 PathProgramCache]: Analyzing trace with hash 940820206, now seen corresponding path program 5 times [2024-06-03 19:47:45,723 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:47:45,723 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1517159034] [2024-06-03 19:47:45,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:47:45,723 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:47:45,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:47:46,559 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:47:46,559 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:47:46,559 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1517159034] [2024-06-03 19:47:46,559 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1517159034] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:47:46,559 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:47:46,559 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:47:46,559 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2094257302] [2024-06-03 19:47:46,559 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:47:46,560 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:47:46,560 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:47:46,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:47:46,560 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:47:46,654 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-03 19:47:46,655 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 437 places, 574 transitions, 5876 flow. Second operand has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:47:46,655 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:47:46,655 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-03 19:47:46,655 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:47:48,387 INFO L124 PetriNetUnfolderBase]: 4117/6579 cut-off events. [2024-06-03 19:47:48,387 INFO L125 PetriNetUnfolderBase]: For 1898002/1898002 co-relation queries the response was YES. [2024-06-03 19:47:48,469 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67232 conditions, 6579 events. 4117/6579 cut-off events. For 1898002/1898002 co-relation queries the response was YES. Maximal size of possible extension queue 444. Compared 41080 event pairs, 864 based on Foata normal form. 2/6567 useless extension candidates. Maximal degree in co-relation 67024. Up to 6268 conditions per place. [2024-06-03 19:47:48,500 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 554 selfloop transitions, 35 changer transitions 0/599 dead transitions. [2024-06-03 19:47:48,500 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 445 places, 599 transitions, 7995 flow [2024-06-03 19:47:48,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:47:48,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:47:48,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 157 transitions. [2024-06-03 19:47:48,500 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40568475452196384 [2024-06-03 19:47:48,500 INFO L175 Difference]: Start difference. First operand has 437 places, 574 transitions, 5876 flow. Second operand 9 states and 157 transitions. [2024-06-03 19:47:48,500 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 445 places, 599 transitions, 7995 flow [2024-06-03 19:47:55,702 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 438 places, 599 transitions, 7845 flow, removed 43 selfloop flow, removed 7 redundant places. [2024-06-03 19:47:55,708 INFO L231 Difference]: Finished difference. Result has 439 places, 583 transitions, 6111 flow [2024-06-03 19:47:55,708 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5726, PETRI_DIFFERENCE_MINUEND_PLACES=430, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=574, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=545, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6111, PETRI_PLACES=439, PETRI_TRANSITIONS=583} [2024-06-03 19:47:55,709 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 395 predicate places. [2024-06-03 19:47:55,709 INFO L495 AbstractCegarLoop]: Abstraction has has 439 places, 583 transitions, 6111 flow [2024-06-03 19:47:55,709 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:47:55,709 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:47:55,709 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:47:55,709 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable148 [2024-06-03 19:47:55,709 INFO L420 AbstractCegarLoop]: === Iteration 150 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:47:55,710 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:47:55,710 INFO L85 PathProgramCache]: Analyzing trace with hash -806555648, now seen corresponding path program 6 times [2024-06-03 19:47:55,710 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:47:55,710 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [227490839] [2024-06-03 19:47:55,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:47:55,710 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:47:55,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:47:56,594 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:47:56,594 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:47:56,594 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [227490839] [2024-06-03 19:47:56,594 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [227490839] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:47:56,594 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:47:56,594 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:47:56,594 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1207098476] [2024-06-03 19:47:56,594 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:47:56,594 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:47:56,594 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:47:56,595 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:47:56,595 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:47:56,678 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-03 19:47:56,678 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 439 places, 583 transitions, 6111 flow. Second operand has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:47:56,678 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:47:56,678 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-03 19:47:56,678 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:47:58,554 INFO L124 PetriNetUnfolderBase]: 4098/6548 cut-off events. [2024-06-03 19:47:58,554 INFO L125 PetriNetUnfolderBase]: For 1910222/1910222 co-relation queries the response was YES. [2024-06-03 19:47:58,631 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66951 conditions, 6548 events. 4098/6548 cut-off events. For 1910222/1910222 co-relation queries the response was YES. Maximal size of possible extension queue 446. Compared 40914 event pairs, 857 based on Foata normal form. 2/6536 useless extension candidates. Maximal degree in co-relation 66742. Up to 6204 conditions per place. [2024-06-03 19:47:58,659 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 536 selfloop transitions, 55 changer transitions 0/601 dead transitions. [2024-06-03 19:47:58,659 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 447 places, 601 transitions, 7742 flow [2024-06-03 19:47:58,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:47:58,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:47:58,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 158 transitions. [2024-06-03 19:47:58,660 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4082687338501292 [2024-06-03 19:47:58,660 INFO L175 Difference]: Start difference. First operand has 439 places, 583 transitions, 6111 flow. Second operand 9 states and 158 transitions. [2024-06-03 19:47:58,660 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 447 places, 601 transitions, 7742 flow [2024-06-03 19:48:05,208 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 443 places, 601 transitions, 7601 flow, removed 61 selfloop flow, removed 4 redundant places. [2024-06-03 19:48:05,214 INFO L231 Difference]: Finished difference. Result has 444 places, 586 transitions, 6193 flow [2024-06-03 19:48:05,214 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5970, PETRI_DIFFERENCE_MINUEND_PLACES=435, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=583, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=531, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6193, PETRI_PLACES=444, PETRI_TRANSITIONS=586} [2024-06-03 19:48:05,215 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 400 predicate places. [2024-06-03 19:48:05,215 INFO L495 AbstractCegarLoop]: Abstraction has has 444 places, 586 transitions, 6193 flow [2024-06-03 19:48:05,215 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:48:05,215 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:48:05,215 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:48:05,215 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable149 [2024-06-03 19:48:05,215 INFO L420 AbstractCegarLoop]: === Iteration 151 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:48:05,215 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:48:05,215 INFO L85 PathProgramCache]: Analyzing trace with hash -570200798, now seen corresponding path program 7 times [2024-06-03 19:48:05,215 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:48:05,215 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [219165859] [2024-06-03 19:48:05,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:48:05,215 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:48:05,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:48:06,014 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:48:06,014 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:48:06,014 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [219165859] [2024-06-03 19:48:06,014 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [219165859] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:48:06,014 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:48:06,014 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:48:06,014 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1606896710] [2024-06-03 19:48:06,014 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:48:06,015 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:48:06,015 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:48:06,015 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:48:06,015 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:48:06,132 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-03 19:48:06,132 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 444 places, 586 transitions, 6193 flow. Second operand has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:48:06,132 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:48:06,132 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-03 19:48:06,132 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:48:07,905 INFO L124 PetriNetUnfolderBase]: 4100/6550 cut-off events. [2024-06-03 19:48:07,906 INFO L125 PetriNetUnfolderBase]: For 1920368/1920368 co-relation queries the response was YES. [2024-06-03 19:48:07,987 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66717 conditions, 6550 events. 4100/6550 cut-off events. For 1920368/1920368 co-relation queries the response was YES. Maximal size of possible extension queue 446. Compared 40923 event pairs, 859 based on Foata normal form. 3/6539 useless extension candidates. Maximal degree in co-relation 66506. Up to 6274 conditions per place. [2024-06-03 19:48:08,015 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 566 selfloop transitions, 23 changer transitions 0/599 dead transitions. [2024-06-03 19:48:08,015 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 452 places, 599 transitions, 7409 flow [2024-06-03 19:48:08,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:48:08,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:48:08,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 150 transitions. [2024-06-03 19:48:08,016 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3875968992248062 [2024-06-03 19:48:08,016 INFO L175 Difference]: Start difference. First operand has 444 places, 586 transitions, 6193 flow. Second operand 9 states and 150 transitions. [2024-06-03 19:48:08,016 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 452 places, 599 transitions, 7409 flow [2024-06-03 19:48:15,115 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 444 places, 599 transitions, 7068 flow, removed 88 selfloop flow, removed 8 redundant places. [2024-06-03 19:48:15,121 INFO L231 Difference]: Finished difference. Result has 445 places, 586 transitions, 5904 flow [2024-06-03 19:48:15,121 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5852, PETRI_DIFFERENCE_MINUEND_PLACES=436, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=586, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=563, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5904, PETRI_PLACES=445, PETRI_TRANSITIONS=586} [2024-06-03 19:48:15,121 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 401 predicate places. [2024-06-03 19:48:15,121 INFO L495 AbstractCegarLoop]: Abstraction has has 445 places, 586 transitions, 5904 flow [2024-06-03 19:48:15,121 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:48:15,121 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:48:15,121 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:48:15,122 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable150 [2024-06-03 19:48:15,122 INFO L420 AbstractCegarLoop]: === Iteration 152 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:48:15,122 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:48:15,122 INFO L85 PathProgramCache]: Analyzing trace with hash -1028400362, now seen corresponding path program 8 times [2024-06-03 19:48:15,122 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:48:15,122 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [285123748] [2024-06-03 19:48:15,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:48:15,122 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:48:15,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:48:15,960 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:48:15,960 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:48:15,960 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [285123748] [2024-06-03 19:48:15,960 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [285123748] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:48:15,960 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:48:15,960 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:48:15,960 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1253873094] [2024-06-03 19:48:15,960 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:48:15,961 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:48:15,961 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:48:15,961 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:48:15,961 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:48:16,079 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-03 19:48:16,079 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 445 places, 586 transitions, 5904 flow. Second operand has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:48:16,079 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:48:16,079 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-03 19:48:16,079 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:48:17,761 INFO L124 PetriNetUnfolderBase]: 4094/6540 cut-off events. [2024-06-03 19:48:17,761 INFO L125 PetriNetUnfolderBase]: For 1904596/1904596 co-relation queries the response was YES. [2024-06-03 19:48:17,847 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65990 conditions, 6540 events. 4094/6540 cut-off events. For 1904596/1904596 co-relation queries the response was YES. Maximal size of possible extension queue 446. Compared 40854 event pairs, 858 based on Foata normal form. 2/6528 useless extension candidates. Maximal degree in co-relation 65778. Up to 6240 conditions per place. [2024-06-03 19:48:17,877 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 554 selfloop transitions, 36 changer transitions 0/600 dead transitions. [2024-06-03 19:48:17,877 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 453 places, 600 transitions, 7126 flow [2024-06-03 19:48:17,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:48:17,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:48:17,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 154 transitions. [2024-06-03 19:48:17,878 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3979328165374677 [2024-06-03 19:48:17,878 INFO L175 Difference]: Start difference. First operand has 445 places, 586 transitions, 5904 flow. Second operand 9 states and 154 transitions. [2024-06-03 19:48:17,878 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 453 places, 600 transitions, 7126 flow [2024-06-03 19:48:25,331 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 445 places, 600 transitions, 7005 flow, removed 33 selfloop flow, removed 8 redundant places. [2024-06-03 19:48:25,337 INFO L231 Difference]: Finished difference. Result has 446 places, 586 transitions, 5861 flow [2024-06-03 19:48:25,337 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5783, PETRI_DIFFERENCE_MINUEND_PLACES=437, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=586, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=550, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5861, PETRI_PLACES=446, PETRI_TRANSITIONS=586} [2024-06-03 19:48:25,337 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 402 predicate places. [2024-06-03 19:48:25,337 INFO L495 AbstractCegarLoop]: Abstraction has has 446 places, 586 transitions, 5861 flow [2024-06-03 19:48:25,337 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:48:25,337 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:48:25,337 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:48:25,337 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151 [2024-06-03 19:48:25,338 INFO L420 AbstractCegarLoop]: === Iteration 153 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:48:25,338 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:48:25,338 INFO L85 PathProgramCache]: Analyzing trace with hash -806560608, now seen corresponding path program 5 times [2024-06-03 19:48:25,338 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:48:25,338 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2066972704] [2024-06-03 19:48:25,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:48:25,338 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:48:25,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:48:26,440 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:48:26,441 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:48:26,441 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2066972704] [2024-06-03 19:48:26,441 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2066972704] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:48:26,441 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:48:26,441 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:48:26,441 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [222117462] [2024-06-03 19:48:26,441 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:48:26,441 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:48:26,441 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:48:26,441 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:48:26,441 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:48:26,589 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-06-03 19:48:26,590 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 446 places, 586 transitions, 5861 flow. Second operand has 10 states, 10 states have (on average 12.7) internal successors, (127), 10 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:48:26,590 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:48:26,590 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-06-03 19:48:26,590 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:48:28,295 INFO L124 PetriNetUnfolderBase]: 4005/6451 cut-off events. [2024-06-03 19:48:28,295 INFO L125 PetriNetUnfolderBase]: For 1908250/1908250 co-relation queries the response was YES. [2024-06-03 19:48:28,381 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65250 conditions, 6451 events. 4005/6451 cut-off events. For 1908250/1908250 co-relation queries the response was YES. Maximal size of possible extension queue 446. Compared 40746 event pairs, 837 based on Foata normal form. 2/6439 useless extension candidates. Maximal degree in co-relation 65037. Up to 6032 conditions per place. [2024-06-03 19:48:28,412 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 534 selfloop transitions, 20 changer transitions 0/600 dead transitions. [2024-06-03 19:48:28,412 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 454 places, 600 transitions, 7085 flow [2024-06-03 19:48:28,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:48:28,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:48:28,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 156 transitions. [2024-06-03 19:48:28,413 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40310077519379844 [2024-06-03 19:48:28,413 INFO L175 Difference]: Start difference. First operand has 446 places, 586 transitions, 5861 flow. Second operand 9 states and 156 transitions. [2024-06-03 19:48:28,413 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 454 places, 600 transitions, 7085 flow [2024-06-03 19:48:36,378 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 446 places, 600 transitions, 7009 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-06-03 19:48:36,383 INFO L231 Difference]: Finished difference. Result has 447 places, 588 transitions, 5918 flow [2024-06-03 19:48:36,383 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5785, PETRI_DIFFERENCE_MINUEND_PLACES=438, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=586, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=566, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5918, PETRI_PLACES=447, PETRI_TRANSITIONS=588} [2024-06-03 19:48:36,383 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 403 predicate places. [2024-06-03 19:48:36,383 INFO L495 AbstractCegarLoop]: Abstraction has has 447 places, 588 transitions, 5918 flow [2024-06-03 19:48:36,384 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.7) internal successors, (127), 10 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:48:36,384 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:48:36,384 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:48:36,384 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152 [2024-06-03 19:48:36,384 INFO L420 AbstractCegarLoop]: === Iteration 154 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:48:36,384 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:48:36,384 INFO L85 PathProgramCache]: Analyzing trace with hash -578481704, now seen corresponding path program 8 times [2024-06-03 19:48:36,384 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:48:36,384 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1036994387] [2024-06-03 19:48:36,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:48:36,385 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:48:36,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:48:37,512 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:48:37,513 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:48:37,513 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1036994387] [2024-06-03 19:48:37,513 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1036994387] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:48:37,513 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:48:37,513 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:48:37,513 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [285686804] [2024-06-03 19:48:37,513 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:48:37,513 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:48:37,513 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:48:37,513 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:48:37,513 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:48:37,628 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-03 19:48:37,628 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 447 places, 588 transitions, 5918 flow. Second operand has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:48:37,628 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:48:37,628 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-03 19:48:37,628 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:48:39,481 INFO L124 PetriNetUnfolderBase]: 4094/6540 cut-off events. [2024-06-03 19:48:39,481 INFO L125 PetriNetUnfolderBase]: For 1915999/1915999 co-relation queries the response was YES. [2024-06-03 19:48:39,565 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65998 conditions, 6540 events. 4094/6540 cut-off events. For 1915999/1915999 co-relation queries the response was YES. Maximal size of possible extension queue 447. Compared 40830 event pairs, 861 based on Foata normal form. 1/6527 useless extension candidates. Maximal degree in co-relation 65784. Up to 6280 conditions per place. [2024-06-03 19:48:39,595 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 571 selfloop transitions, 21 changer transitions 0/602 dead transitions. [2024-06-03 19:48:39,595 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 455 places, 602 transitions, 7232 flow [2024-06-03 19:48:39,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:48:39,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:48:39,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 148 transitions. [2024-06-03 19:48:39,596 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38242894056847543 [2024-06-03 19:48:39,596 INFO L175 Difference]: Start difference. First operand has 447 places, 588 transitions, 5918 flow. Second operand 9 states and 148 transitions. [2024-06-03 19:48:39,596 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 455 places, 602 transitions, 7232 flow [2024-06-03 19:48:47,395 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 448 places, 602 transitions, 7115 flow, removed 40 selfloop flow, removed 7 redundant places. [2024-06-03 19:48:47,400 INFO L231 Difference]: Finished difference. Result has 449 places, 591 transitions, 5955 flow [2024-06-03 19:48:47,400 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5801, PETRI_DIFFERENCE_MINUEND_PLACES=440, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=588, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=567, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5955, PETRI_PLACES=449, PETRI_TRANSITIONS=591} [2024-06-03 19:48:47,400 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 405 predicate places. [2024-06-03 19:48:47,400 INFO L495 AbstractCegarLoop]: Abstraction has has 449 places, 591 transitions, 5955 flow [2024-06-03 19:48:47,401 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:48:47,401 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:48:47,401 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:48:47,401 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable153 [2024-06-03 19:48:47,401 INFO L420 AbstractCegarLoop]: === Iteration 155 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:48:47,401 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:48:47,401 INFO L85 PathProgramCache]: Analyzing trace with hash -1256479328, now seen corresponding path program 9 times [2024-06-03 19:48:47,401 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:48:47,401 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [584428532] [2024-06-03 19:48:47,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:48:47,402 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:48:47,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:48:48,358 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:48:48,359 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:48:48,359 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [584428532] [2024-06-03 19:48:48,359 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [584428532] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:48:48,359 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:48:48,359 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:48:48,359 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1640057966] [2024-06-03 19:48:48,359 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:48:48,359 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:48:48,359 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:48:48,359 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:48:48,359 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:48:48,482 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-03 19:48:48,482 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 449 places, 591 transitions, 5955 flow. Second operand has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:48:48,482 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:48:48,482 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-03 19:48:48,482 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:48:50,211 INFO L124 PetriNetUnfolderBase]: 4099/6547 cut-off events. [2024-06-03 19:48:50,212 INFO L125 PetriNetUnfolderBase]: For 1940287/1940287 co-relation queries the response was YES. [2024-06-03 19:48:50,296 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66544 conditions, 6547 events. 4099/6547 cut-off events. For 1940287/1940287 co-relation queries the response was YES. Maximal size of possible extension queue 448. Compared 40892 event pairs, 861 based on Foata normal form. 1/6534 useless extension candidates. Maximal degree in co-relation 66329. Up to 6259 conditions per place. [2024-06-03 19:48:50,328 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 554 selfloop transitions, 45 changer transitions 0/609 dead transitions. [2024-06-03 19:48:50,329 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 457 places, 609 transitions, 7705 flow [2024-06-03 19:48:50,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:48:50,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:48:50,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 153 transitions. [2024-06-03 19:48:50,329 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3953488372093023 [2024-06-03 19:48:50,329 INFO L175 Difference]: Start difference. First operand has 449 places, 591 transitions, 5955 flow. Second operand 9 states and 153 transitions. [2024-06-03 19:48:50,329 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 457 places, 609 transitions, 7705 flow [2024-06-03 19:48:58,514 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 450 places, 609 transitions, 7573 flow, removed 47 selfloop flow, removed 7 redundant places. [2024-06-03 19:48:58,520 INFO L231 Difference]: Finished difference. Result has 451 places, 597 transitions, 6137 flow [2024-06-03 19:48:58,520 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5823, PETRI_DIFFERENCE_MINUEND_PLACES=442, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=591, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=549, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6137, PETRI_PLACES=451, PETRI_TRANSITIONS=597} [2024-06-03 19:48:58,521 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 407 predicate places. [2024-06-03 19:48:58,521 INFO L495 AbstractCegarLoop]: Abstraction has has 451 places, 597 transitions, 6137 flow [2024-06-03 19:48:58,521 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:48:58,521 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:48:58,521 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:48:58,521 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable154 [2024-06-03 19:48:58,521 INFO L420 AbstractCegarLoop]: === Iteration 156 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:48:58,522 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:48:58,522 INFO L85 PathProgramCache]: Analyzing trace with hash -1256295002, now seen corresponding path program 9 times [2024-06-03 19:48:58,522 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:48:58,522 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1048357928] [2024-06-03 19:48:58,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:48:58,522 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:48:58,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:48:59,382 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:48:59,382 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:48:59,382 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1048357928] [2024-06-03 19:48:59,382 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1048357928] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:48:59,382 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:48:59,382 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:48:59,382 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1498040322] [2024-06-03 19:48:59,384 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:48:59,384 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:48:59,384 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:48:59,384 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:48:59,384 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:48:59,473 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-03 19:48:59,473 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 451 places, 597 transitions, 6137 flow. Second operand has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:48:59,473 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:48:59,473 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-03 19:48:59,473 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:49:01,201 INFO L124 PetriNetUnfolderBase]: 4109/6563 cut-off events. [2024-06-03 19:49:01,201 INFO L125 PetriNetUnfolderBase]: For 1982747/1982747 co-relation queries the response was YES. [2024-06-03 19:49:01,289 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67280 conditions, 6563 events. 4109/6563 cut-off events. For 1982747/1982747 co-relation queries the response was YES. Maximal size of possible extension queue 450. Compared 40994 event pairs, 859 based on Foata normal form. 2/6551 useless extension candidates. Maximal degree in co-relation 67064. Up to 6217 conditions per place. [2024-06-03 19:49:01,320 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 549 selfloop transitions, 56 changer transitions 0/615 dead transitions. [2024-06-03 19:49:01,320 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 459 places, 615 transitions, 7791 flow [2024-06-03 19:49:01,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:49:01,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:49:01,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 159 transitions. [2024-06-03 19:49:01,321 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4108527131782946 [2024-06-03 19:49:01,321 INFO L175 Difference]: Start difference. First operand has 451 places, 597 transitions, 6137 flow. Second operand 9 states and 159 transitions. [2024-06-03 19:49:01,321 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 459 places, 615 transitions, 7791 flow [2024-06-03 19:49:09,068 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 454 places, 615 transitions, 7610 flow, removed 72 selfloop flow, removed 5 redundant places. [2024-06-03 19:49:09,074 INFO L231 Difference]: Finished difference. Result has 455 places, 600 transitions, 6164 flow [2024-06-03 19:49:09,075 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5956, PETRI_DIFFERENCE_MINUEND_PLACES=446, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=597, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=544, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6164, PETRI_PLACES=455, PETRI_TRANSITIONS=600} [2024-06-03 19:49:09,075 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 411 predicate places. [2024-06-03 19:49:09,075 INFO L495 AbstractCegarLoop]: Abstraction has has 455 places, 600 transitions, 6164 flow [2024-06-03 19:49:09,075 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:49:09,075 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:49:09,075 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:49:09,076 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable155 [2024-06-03 19:49:09,076 INFO L420 AbstractCegarLoop]: === Iteration 157 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:49:09,076 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:49:09,076 INFO L85 PathProgramCache]: Analyzing trace with hash -1256301512, now seen corresponding path program 10 times [2024-06-03 19:49:09,076 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:49:09,076 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [891610317] [2024-06-03 19:49:09,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:49:09,077 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:49:09,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:49:09,930 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:49:09,930 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:49:09,930 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [891610317] [2024-06-03 19:49:09,930 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [891610317] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:49:09,930 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:49:09,930 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:49:09,930 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1757839025] [2024-06-03 19:49:09,930 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:49:09,931 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:49:09,931 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:49:09,931 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:49:09,931 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:49:10,024 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-03 19:49:10,024 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 455 places, 600 transitions, 6164 flow. Second operand has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:49:10,024 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:49:10,024 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-03 19:49:10,024 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:49:11,785 INFO L124 PetriNetUnfolderBase]: 4095/6547 cut-off events. [2024-06-03 19:49:11,786 INFO L125 PetriNetUnfolderBase]: For 1981327/1981327 co-relation queries the response was YES. [2024-06-03 19:49:11,869 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66961 conditions, 6547 events. 4095/6547 cut-off events. For 1981327/1981327 co-relation queries the response was YES. Maximal size of possible extension queue 450. Compared 40920 event pairs, 856 based on Foata normal form. 2/6535 useless extension candidates. Maximal degree in co-relation 66743. Up to 6206 conditions per place. [2024-06-03 19:49:11,899 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 550 selfloop transitions, 55 changer transitions 0/615 dead transitions. [2024-06-03 19:49:11,900 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 463 places, 615 transitions, 7420 flow [2024-06-03 19:49:11,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:49:11,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:49:11,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 160 transitions. [2024-06-03 19:49:11,900 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4134366925064599 [2024-06-03 19:49:11,900 INFO L175 Difference]: Start difference. First operand has 455 places, 600 transitions, 6164 flow. Second operand 9 states and 160 transitions. [2024-06-03 19:49:11,900 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 463 places, 615 transitions, 7420 flow [2024-06-03 19:49:19,258 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 456 places, 615 transitions, 7142 flow, removed 78 selfloop flow, removed 7 redundant places. [2024-06-03 19:49:19,264 INFO L231 Difference]: Finished difference. Result has 457 places, 600 transitions, 6002 flow [2024-06-03 19:49:19,264 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5886, PETRI_DIFFERENCE_MINUEND_PLACES=448, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=600, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=545, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6002, PETRI_PLACES=457, PETRI_TRANSITIONS=600} [2024-06-03 19:49:19,265 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 413 predicate places. [2024-06-03 19:49:19,265 INFO L495 AbstractCegarLoop]: Abstraction has has 457 places, 600 transitions, 6002 flow [2024-06-03 19:49:19,265 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:49:19,265 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:49:19,265 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:49:19,265 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable156 [2024-06-03 19:49:19,265 INFO L420 AbstractCegarLoop]: === Iteration 158 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:49:19,266 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:49:19,266 INFO L85 PathProgramCache]: Analyzing trace with hash -806382854, now seen corresponding path program 10 times [2024-06-03 19:49:19,266 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:49:19,266 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [748070491] [2024-06-03 19:49:19,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:49:19,266 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:49:19,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:49:20,241 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:49:20,242 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:49:20,242 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [748070491] [2024-06-03 19:49:20,242 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [748070491] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:49:20,242 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:49:20,242 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:49:20,242 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2126830310] [2024-06-03 19:49:20,242 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:49:20,242 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:49:20,242 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:49:20,242 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:49:20,242 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:49:20,358 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-03 19:49:20,358 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 457 places, 600 transitions, 6002 flow. Second operand has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:49:20,358 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:49:20,358 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-03 19:49:20,358 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:49:22,033 INFO L124 PetriNetUnfolderBase]: 4100/6553 cut-off events. [2024-06-03 19:49:22,034 INFO L125 PetriNetUnfolderBase]: For 1972719/1972719 co-relation queries the response was YES. [2024-06-03 19:49:22,124 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66611 conditions, 6553 events. 4100/6553 cut-off events. For 1972719/1972719 co-relation queries the response was YES. Maximal size of possible extension queue 450. Compared 40921 event pairs, 858 based on Foata normal form. 1/6540 useless extension candidates. Maximal degree in co-relation 66393. Up to 6274 conditions per place. [2024-06-03 19:49:22,153 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 568 selfloop transitions, 33 changer transitions 0/611 dead transitions. [2024-06-03 19:49:22,153 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 465 places, 611 transitions, 7234 flow [2024-06-03 19:49:22,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:49:22,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:49:22,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 152 transitions. [2024-06-03 19:49:22,154 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39276485788113696 [2024-06-03 19:49:22,154 INFO L175 Difference]: Start difference. First operand has 457 places, 600 transitions, 6002 flow. Second operand 9 states and 152 transitions. [2024-06-03 19:49:22,154 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 465 places, 611 transitions, 7234 flow [2024-06-03 19:49:31,718 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 456 places, 611 transitions, 7048 flow, removed 20 selfloop flow, removed 9 redundant places. [2024-06-03 19:49:31,723 INFO L231 Difference]: Finished difference. Result has 457 places, 600 transitions, 5888 flow [2024-06-03 19:49:31,723 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5816, PETRI_DIFFERENCE_MINUEND_PLACES=448, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=600, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=567, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5888, PETRI_PLACES=457, PETRI_TRANSITIONS=600} [2024-06-03 19:49:31,724 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 413 predicate places. [2024-06-03 19:49:31,724 INFO L495 AbstractCegarLoop]: Abstraction has has 457 places, 600 transitions, 5888 flow [2024-06-03 19:49:31,724 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:49:31,724 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:49:31,724 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:49:31,724 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable157 [2024-06-03 19:49:31,724 INFO L420 AbstractCegarLoop]: === Iteration 159 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:49:31,724 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:49:31,724 INFO L85 PathProgramCache]: Analyzing trace with hash -1019811812, now seen corresponding path program 1 times [2024-06-03 19:49:31,724 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:49:31,725 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [558305726] [2024-06-03 19:49:31,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:49:31,725 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:49:31,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:49:32,792 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:49:32,792 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:49:32,792 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [558305726] [2024-06-03 19:49:32,792 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [558305726] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:49:32,792 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:49:32,793 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:49:32,793 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1651538702] [2024-06-03 19:49:32,793 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:49:32,793 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:49:32,793 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:49:32,793 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:49:32,793 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:49:32,880 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-03 19:49:32,880 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 457 places, 600 transitions, 5888 flow. Second operand has 10 states, 10 states have (on average 10.8) internal successors, (108), 10 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:49:32,880 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:49:32,880 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-03 19:49:32,880 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:49:34,965 INFO L124 PetriNetUnfolderBase]: 4307/6777 cut-off events. [2024-06-03 19:49:34,965 INFO L125 PetriNetUnfolderBase]: For 2307504/2307504 co-relation queries the response was YES. [2024-06-03 19:49:35,051 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71766 conditions, 6777 events. 4307/6777 cut-off events. For 2307504/2307504 co-relation queries the response was YES. Maximal size of possible extension queue 449. Compared 41237 event pairs, 929 based on Foata normal form. 2/6778 useless extension candidates. Maximal degree in co-relation 71547. Up to 6597 conditions per place. [2024-06-03 19:49:35,082 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 588 selfloop transitions, 22 changer transitions 0/614 dead transitions. [2024-06-03 19:49:35,082 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 465 places, 614 transitions, 7220 flow [2024-06-03 19:49:35,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:49:35,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:49:35,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 141 transitions. [2024-06-03 19:49:35,082 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3643410852713178 [2024-06-03 19:49:35,082 INFO L175 Difference]: Start difference. First operand has 457 places, 600 transitions, 5888 flow. Second operand 9 states and 141 transitions. [2024-06-03 19:49:35,082 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 465 places, 614 transitions, 7220 flow [2024-06-03 19:49:45,119 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 457 places, 614 transitions, 7126 flow, removed 8 selfloop flow, removed 8 redundant places. [2024-06-03 19:49:45,124 INFO L231 Difference]: Finished difference. Result has 458 places, 602 transitions, 5927 flow [2024-06-03 19:49:45,124 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5794, PETRI_DIFFERENCE_MINUEND_PLACES=449, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=600, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=578, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5927, PETRI_PLACES=458, PETRI_TRANSITIONS=602} [2024-06-03 19:49:45,125 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 414 predicate places. [2024-06-03 19:49:45,125 INFO L495 AbstractCegarLoop]: Abstraction has has 458 places, 602 transitions, 5927 flow [2024-06-03 19:49:45,125 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.8) internal successors, (108), 10 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:49:45,125 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:49:45,125 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:49:45,125 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable158 [2024-06-03 19:49:45,125 INFO L420 AbstractCegarLoop]: === Iteration 160 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:49:45,125 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:49:45,125 INFO L85 PathProgramCache]: Analyzing trace with hash -2037438984, now seen corresponding path program 1 times [2024-06-03 19:49:45,125 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:49:45,125 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1825514700] [2024-06-03 19:49:45,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:49:45,125 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:49:45,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:49:46,263 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:49:46,263 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:49:46,263 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1825514700] [2024-06-03 19:49:46,263 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1825514700] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:49:46,263 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:49:46,263 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:49:46,263 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1590721947] [2024-06-03 19:49:46,263 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:49:46,263 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:49:46,263 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:49:46,264 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:49:46,264 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:49:46,371 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-03 19:49:46,371 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 458 places, 602 transitions, 5927 flow. Second operand has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:49:46,371 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:49:46,371 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-03 19:49:46,371 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:49:48,284 INFO L124 PetriNetUnfolderBase]: 4227/6712 cut-off events. [2024-06-03 19:49:48,284 INFO L125 PetriNetUnfolderBase]: For 2325623/2325625 co-relation queries the response was YES. [2024-06-03 19:49:48,388 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71741 conditions, 6712 events. 4227/6712 cut-off events. For 2325623/2325625 co-relation queries the response was YES. Maximal size of possible extension queue 454. Compared 41450 event pairs, 820 based on Foata normal form. 3/6714 useless extension candidates. Maximal degree in co-relation 71521. Up to 6224 conditions per place. [2024-06-03 19:49:48,419 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 520 selfloop transitions, 69 changer transitions 0/632 dead transitions. [2024-06-03 19:49:48,419 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 466 places, 632 transitions, 7309 flow [2024-06-03 19:49:48,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:49:48,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:49:48,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 166 transitions. [2024-06-03 19:49:48,420 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4289405684754522 [2024-06-03 19:49:48,420 INFO L175 Difference]: Start difference. First operand has 458 places, 602 transitions, 5927 flow. Second operand 9 states and 166 transitions. [2024-06-03 19:49:48,420 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 466 places, 632 transitions, 7309 flow [2024-06-03 19:49:59,887 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 459 places, 632 transitions, 7192 flow, removed 38 selfloop flow, removed 7 redundant places. [2024-06-03 19:49:59,892 INFO L231 Difference]: Finished difference. Result has 460 places, 605 transitions, 6079 flow [2024-06-03 19:49:59,892 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5810, PETRI_DIFFERENCE_MINUEND_PLACES=451, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=602, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=533, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6079, PETRI_PLACES=460, PETRI_TRANSITIONS=605} [2024-06-03 19:49:59,893 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 416 predicate places. [2024-06-03 19:49:59,893 INFO L495 AbstractCegarLoop]: Abstraction has has 460 places, 605 transitions, 6079 flow [2024-06-03 19:49:59,893 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:49:59,893 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:49:59,893 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:49:59,893 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable159 [2024-06-03 19:49:59,893 INFO L420 AbstractCegarLoop]: === Iteration 161 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:49:59,893 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:49:59,893 INFO L85 PathProgramCache]: Analyzing trace with hash -1765453980, now seen corresponding path program 1 times [2024-06-03 19:49:59,893 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:49:59,894 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2089378791] [2024-06-03 19:49:59,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:49:59,894 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:49:59,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:50:00,979 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:50:00,979 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:50:00,979 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2089378791] [2024-06-03 19:50:00,979 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2089378791] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:50:00,979 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:50:00,980 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:50:00,980 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1644563929] [2024-06-03 19:50:00,980 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:50:00,980 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:50:00,980 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:50:00,980 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:50:00,980 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:50:01,043 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-03 19:50:01,043 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 460 places, 605 transitions, 6079 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) [2024-06-03 19:50:01,043 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:50:01,043 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-03 19:50:01,043 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:50:03,105 INFO L124 PetriNetUnfolderBase]: 4317/6801 cut-off events. [2024-06-03 19:50:03,105 INFO L125 PetriNetUnfolderBase]: For 2350990/2350992 co-relation queries the response was YES. [2024-06-03 19:50:03,198 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72869 conditions, 6801 events. 4317/6801 cut-off events. For 2350990/2350992 co-relation queries the response was YES. Maximal size of possible extension queue 455. Compared 41431 event pairs, 851 based on Foata normal form. 3/6803 useless extension candidates. Maximal degree in co-relation 72648. Up to 6430 conditions per place. [2024-06-03 19:50:03,226 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 546 selfloop transitions, 86 changer transitions 0/636 dead transitions. [2024-06-03 19:50:03,227 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 468 places, 636 transitions, 7923 flow [2024-06-03 19:50:03,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:50:03,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:50:03,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 164 transitions. [2024-06-03 19:50:03,228 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42377260981912146 [2024-06-03 19:50:03,228 INFO L175 Difference]: Start difference. First operand has 460 places, 605 transitions, 6079 flow. Second operand 9 states and 164 transitions. [2024-06-03 19:50:03,228 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 468 places, 636 transitions, 7923 flow [2024-06-03 19:50:15,086 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 461 places, 636 transitions, 7686 flow, removed 54 selfloop flow, removed 7 redundant places. [2024-06-03 19:50:15,092 INFO L231 Difference]: Finished difference. Result has 462 places, 611 transitions, 6206 flow [2024-06-03 19:50:15,092 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=5842, PETRI_DIFFERENCE_MINUEND_PLACES=453, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=605, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=83, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=522, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6206, PETRI_PLACES=462, PETRI_TRANSITIONS=611} [2024-06-03 19:50:15,092 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 418 predicate places. [2024-06-03 19:50:15,092 INFO L495 AbstractCegarLoop]: Abstraction has has 462 places, 611 transitions, 6206 flow [2024-06-03 19:50:15,092 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) [2024-06-03 19:50:15,092 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:50:15,092 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:50:15,092 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable160 [2024-06-03 19:50:15,093 INFO L420 AbstractCegarLoop]: === Iteration 162 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:50:15,093 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:50:15,093 INFO L85 PathProgramCache]: Analyzing trace with hash -2037319014, now seen corresponding path program 2 times [2024-06-03 19:50:15,093 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:50:15,093 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2119042496] [2024-06-03 19:50:15,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:50:15,093 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:50:15,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:50:16,155 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:50:16,156 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:50:16,156 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2119042496] [2024-06-03 19:50:16,156 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2119042496] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:50:16,156 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:50:16,156 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:50:16,156 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [880950204] [2024-06-03 19:50:16,156 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:50:16,156 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:50:16,156 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:50:16,156 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:50:16,156 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:50:16,243 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-03 19:50:16,243 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 462 places, 611 transitions, 6206 flow. Second operand has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:50:16,243 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:50:16,243 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-03 19:50:16,243 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:50:18,254 INFO L124 PetriNetUnfolderBase]: 4237/6724 cut-off events. [2024-06-03 19:50:18,254 INFO L125 PetriNetUnfolderBase]: For 2390926/2390928 co-relation queries the response was YES. [2024-06-03 19:50:18,339 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73068 conditions, 6724 events. 4237/6724 cut-off events. For 2390926/2390928 co-relation queries the response was YES. Maximal size of possible extension queue 455. Compared 41514 event pairs, 820 based on Foata normal form. 3/6726 useless extension candidates. Maximal degree in co-relation 72846. Up to 6171 conditions per place. [2024-06-03 19:50:18,366 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 506 selfloop transitions, 91 changer transitions 0/642 dead transitions. [2024-06-03 19:50:18,366 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 470 places, 642 transitions, 8046 flow [2024-06-03 19:50:18,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:50:18,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:50:18,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 170 transitions. [2024-06-03 19:50:18,367 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4392764857881137 [2024-06-03 19:50:18,367 INFO L175 Difference]: Start difference. First operand has 462 places, 611 transitions, 6206 flow. Second operand 9 states and 170 transitions. [2024-06-03 19:50:18,367 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 470 places, 642 transitions, 8046 flow [2024-06-03 19:50:30,732 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 466 places, 642 transitions, 7856 flow, removed 73 selfloop flow, removed 4 redundant places. [2024-06-03 19:50:30,738 INFO L231 Difference]: Finished difference. Result has 467 places, 617 transitions, 6454 flow [2024-06-03 19:50:30,739 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6016, PETRI_DIFFERENCE_MINUEND_PLACES=458, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=611, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=523, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6454, PETRI_PLACES=467, PETRI_TRANSITIONS=617} [2024-06-03 19:50:30,739 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 423 predicate places. [2024-06-03 19:50:30,739 INFO L495 AbstractCegarLoop]: Abstraction has has 467 places, 617 transitions, 6454 flow [2024-06-03 19:50:30,739 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:50:30,739 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:50:30,739 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:50:30,739 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable161 [2024-06-03 19:50:30,739 INFO L420 AbstractCegarLoop]: === Iteration 163 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:50:30,739 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:50:30,739 INFO L85 PathProgramCache]: Analyzing trace with hash 1530537042, now seen corresponding path program 2 times [2024-06-03 19:50:30,739 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:50:30,739 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1610278082] [2024-06-03 19:50:30,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:50:30,740 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:50:30,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:50:31,906 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:50:31,907 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:50:31,907 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1610278082] [2024-06-03 19:50:31,907 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1610278082] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:50:31,907 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:50:31,907 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:50:31,907 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1350682141] [2024-06-03 19:50:31,907 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:50:31,907 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:50:31,907 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:50:31,907 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:50:31,907 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:50:32,055 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-03 19:50:32,055 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 467 places, 617 transitions, 6454 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) [2024-06-03 19:50:32,055 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:50:32,055 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-03 19:50:32,055 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:50:34,070 INFO L124 PetriNetUnfolderBase]: 4340/6825 cut-off events. [2024-06-03 19:50:34,070 INFO L125 PetriNetUnfolderBase]: For 2434652/2434654 co-relation queries the response was YES. [2024-06-03 19:50:34,173 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74454 conditions, 6825 events. 4340/6825 cut-off events. For 2434652/2434654 co-relation queries the response was YES. Maximal size of possible extension queue 454. Compared 41549 event pairs, 867 based on Foata normal form. 3/6827 useless extension candidates. Maximal degree in co-relation 74230. Up to 6532 conditions per place. [2024-06-03 19:50:34,204 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 568 selfloop transitions, 76 changer transitions 0/648 dead transitions. [2024-06-03 19:50:34,204 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 475 places, 648 transitions, 8253 flow [2024-06-03 19:50:34,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:50:34,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:50:34,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 161 transitions. [2024-06-03 19:50:34,205 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4160206718346253 [2024-06-03 19:50:34,205 INFO L175 Difference]: Start difference. First operand has 467 places, 617 transitions, 6454 flow. Second operand 9 states and 161 transitions. [2024-06-03 19:50:34,205 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 475 places, 648 transitions, 8253 flow [2024-06-03 19:50:43,471 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 470 places, 648 transitions, 8026 flow, removed 78 selfloop flow, removed 5 redundant places. [2024-06-03 19:50:43,477 INFO L231 Difference]: Finished difference. Result has 471 places, 626 transitions, 6510 flow [2024-06-03 19:50:43,477 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6227, PETRI_DIFFERENCE_MINUEND_PLACES=462, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=617, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=547, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6510, PETRI_PLACES=471, PETRI_TRANSITIONS=626} [2024-06-03 19:50:43,477 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 427 predicate places. [2024-06-03 19:50:43,478 INFO L495 AbstractCegarLoop]: Abstraction has has 471 places, 626 transitions, 6510 flow [2024-06-03 19:50:43,478 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) [2024-06-03 19:50:43,478 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:50:43,478 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:50:43,478 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable162 [2024-06-03 19:50:43,478 INFO L420 AbstractCegarLoop]: === Iteration 164 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:50:43,478 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:50:43,478 INFO L85 PathProgramCache]: Analyzing trace with hash 1530536856, now seen corresponding path program 3 times [2024-06-03 19:50:43,479 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:50:43,479 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1732448909] [2024-06-03 19:50:43,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:50:43,479 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:50:43,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:50:44,530 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:50:44,530 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:50:44,531 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1732448909] [2024-06-03 19:50:44,531 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1732448909] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:50:44,531 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:50:44,531 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:50:44,531 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1785606634] [2024-06-03 19:50:44,531 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:50:44,531 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:50:44,531 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:50:44,531 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:50:44,531 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:50:44,637 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-03 19:50:44,637 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 471 places, 626 transitions, 6510 flow. Second operand has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:50:44,637 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:50:44,637 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-03 19:50:44,637 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:50:46,601 INFO L124 PetriNetUnfolderBase]: 4260/6747 cut-off events. [2024-06-03 19:50:46,602 INFO L125 PetriNetUnfolderBase]: For 2466665/2466667 co-relation queries the response was YES. [2024-06-03 19:50:46,701 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74283 conditions, 6747 events. 4260/6747 cut-off events. For 2466665/2466667 co-relation queries the response was YES. Maximal size of possible extension queue 455. Compared 41513 event pairs, 844 based on Foata normal form. 3/6749 useless extension candidates. Maximal degree in co-relation 74057. Up to 6320 conditions per place. [2024-06-03 19:50:46,732 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 547 selfloop transitions, 55 changer transitions 0/650 dead transitions. [2024-06-03 19:50:46,733 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 479 places, 650 transitions, 7868 flow [2024-06-03 19:50:46,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:50:46,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:50:46,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 163 transitions. [2024-06-03 19:50:46,733 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42118863049095606 [2024-06-03 19:50:46,733 INFO L175 Difference]: Start difference. First operand has 471 places, 626 transitions, 6510 flow. Second operand 9 states and 163 transitions. [2024-06-03 19:50:46,733 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 479 places, 650 transitions, 7868 flow [2024-06-03 19:50:58,359 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 475 places, 650 transitions, 7755 flow, removed 19 selfloop flow, removed 4 redundant places. [2024-06-03 19:50:58,365 INFO L231 Difference]: Finished difference. Result has 476 places, 629 transitions, 6607 flow [2024-06-03 19:50:58,365 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6397, PETRI_DIFFERENCE_MINUEND_PLACES=467, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=626, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=571, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6607, PETRI_PLACES=476, PETRI_TRANSITIONS=629} [2024-06-03 19:50:58,366 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 432 predicate places. [2024-06-03 19:50:58,366 INFO L495 AbstractCegarLoop]: Abstraction has has 476 places, 629 transitions, 6607 flow [2024-06-03 19:50:58,366 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:50:58,366 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:50:58,366 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:50:58,366 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable163 [2024-06-03 19:50:58,366 INFO L420 AbstractCegarLoop]: === Iteration 165 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:50:58,366 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:50:58,366 INFO L85 PathProgramCache]: Analyzing trace with hash 1529584900, now seen corresponding path program 3 times [2024-06-03 19:50:58,366 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:50:58,366 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [123122992] [2024-06-03 19:50:58,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:50:58,366 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:50:58,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:50:59,335 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:50:59,335 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:50:59,335 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [123122992] [2024-06-03 19:50:59,335 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [123122992] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:50:59,335 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:50:59,335 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:50:59,335 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2012036960] [2024-06-03 19:50:59,335 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:50:59,335 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:50:59,335 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:50:59,335 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:50:59,335 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:50:59,422 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-03 19:50:59,422 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 476 places, 629 transitions, 6607 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) [2024-06-03 19:50:59,422 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:50:59,422 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-03 19:50:59,422 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:51:01,502 INFO L124 PetriNetUnfolderBase]: 4342/6832 cut-off events. [2024-06-03 19:51:01,502 INFO L125 PetriNetUnfolderBase]: For 2477129/2477131 co-relation queries the response was YES. [2024-06-03 19:51:01,596 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74794 conditions, 6832 events. 4342/6832 cut-off events. For 2477129/2477131 co-relation queries the response was YES. Maximal size of possible extension queue 457. Compared 41660 event pairs, 867 based on Foata normal form. 3/6834 useless extension candidates. Maximal degree in co-relation 74566. Up to 6542 conditions per place. [2024-06-03 19:51:01,625 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 575 selfloop transitions, 71 changer transitions 0/650 dead transitions. [2024-06-03 19:51:01,625 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 484 places, 650 transitions, 7965 flow [2024-06-03 19:51:01,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:51:01,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:51:01,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 158 transitions. [2024-06-03 19:51:01,626 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4082687338501292 [2024-06-03 19:51:01,626 INFO L175 Difference]: Start difference. First operand has 476 places, 629 transitions, 6607 flow. Second operand 9 states and 158 transitions. [2024-06-03 19:51:01,626 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 484 places, 650 transitions, 7965 flow [2024-06-03 19:51:14,281 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 477 places, 650 transitions, 7757 flow, removed 51 selfloop flow, removed 7 redundant places. [2024-06-03 19:51:14,287 INFO L231 Difference]: Finished difference. Result has 478 places, 629 transitions, 6547 flow [2024-06-03 19:51:14,288 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6399, PETRI_DIFFERENCE_MINUEND_PLACES=469, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=629, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=558, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6547, PETRI_PLACES=478, PETRI_TRANSITIONS=629} [2024-06-03 19:51:14,288 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 434 predicate places. [2024-06-03 19:51:14,288 INFO L495 AbstractCegarLoop]: Abstraction has has 478 places, 629 transitions, 6547 flow [2024-06-03 19:51:14,288 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) [2024-06-03 19:51:14,288 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:51:14,288 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:51:14,289 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable164 [2024-06-03 19:51:14,289 INFO L420 AbstractCegarLoop]: === Iteration 166 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:51:14,289 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:51:14,289 INFO L85 PathProgramCache]: Analyzing trace with hash -315605699, now seen corresponding path program 1 times [2024-06-03 19:51:14,289 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:51:14,289 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [369161331] [2024-06-03 19:51:14,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:51:14,289 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:51:14,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:51:15,275 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:51:15,275 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:51:15,275 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [369161331] [2024-06-03 19:51:15,275 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [369161331] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:51:15,275 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:51:15,275 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:51:15,275 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [988114628] [2024-06-03 19:51:15,275 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:51:15,276 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:51:15,276 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:51:15,276 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:51:15,276 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:51:15,448 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-03 19:51:15,448 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 478 places, 629 transitions, 6547 flow. Second operand has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:51:15,448 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:51:15,449 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-03 19:51:15,449 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:51:17,373 INFO L124 PetriNetUnfolderBase]: 4270/6759 cut-off events. [2024-06-03 19:51:17,373 INFO L125 PetriNetUnfolderBase]: For 2524583/2524585 co-relation queries the response was YES. [2024-06-03 19:51:17,471 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74879 conditions, 6759 events. 4270/6759 cut-off events. For 2524583/2524585 co-relation queries the response was YES. Maximal size of possible extension queue 458. Compared 41552 event pairs, 850 based on Foata normal form. 3/6761 useless extension candidates. Maximal degree in co-relation 74650. Up to 6368 conditions per place. [2024-06-03 19:51:17,502 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 583 selfloop transitions, 34 changer transitions 0/665 dead transitions. [2024-06-03 19:51:17,503 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 487 places, 665 transitions, 8401 flow [2024-06-03 19:51:17,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 19:51:17,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 19:51:17,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 179 transitions. [2024-06-03 19:51:17,503 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41627906976744183 [2024-06-03 19:51:17,503 INFO L175 Difference]: Start difference. First operand has 478 places, 629 transitions, 6547 flow. Second operand 10 states and 179 transitions. [2024-06-03 19:51:17,503 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 487 places, 665 transitions, 8401 flow [2024-06-03 19:51:29,836 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 479 places, 665 transitions, 8244 flow, removed 2 selfloop flow, removed 8 redundant places. [2024-06-03 19:51:29,842 INFO L231 Difference]: Finished difference. Result has 481 places, 638 transitions, 6680 flow [2024-06-03 19:51:29,842 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6390, PETRI_DIFFERENCE_MINUEND_PLACES=470, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=629, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=599, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6680, PETRI_PLACES=481, PETRI_TRANSITIONS=638} [2024-06-03 19:51:29,842 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 437 predicate places. [2024-06-03 19:51:29,842 INFO L495 AbstractCegarLoop]: Abstraction has has 481 places, 638 transitions, 6680 flow [2024-06-03 19:51:29,842 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:51:29,843 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:51:29,843 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:51:29,843 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable165 [2024-06-03 19:51:29,843 INFO L420 AbstractCegarLoop]: === Iteration 167 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:51:29,843 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:51:29,843 INFO L85 PathProgramCache]: Analyzing trace with hash -1752335929, now seen corresponding path program 2 times [2024-06-03 19:51:29,843 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:51:29,843 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [756419139] [2024-06-03 19:51:29,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:51:29,843 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:51:29,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:51:30,933 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:51:30,933 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:51:30,933 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [756419139] [2024-06-03 19:51:30,933 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [756419139] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:51:30,933 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:51:30,933 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:51:30,933 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [557460883] [2024-06-03 19:51:30,933 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:51:30,933 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:51:30,933 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:51:30,934 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:51:30,934 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:51:31,056 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 43 [2024-06-03 19:51:31,057 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 481 places, 638 transitions, 6680 flow. Second operand has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:51:31,057 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:51:31,057 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 43 [2024-06-03 19:51:31,057 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:51:33,084 INFO L124 PetriNetUnfolderBase]: 4267/6757 cut-off events. [2024-06-03 19:51:33,084 INFO L125 PetriNetUnfolderBase]: For 2545400/2545402 co-relation queries the response was YES. [2024-06-03 19:51:33,185 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75286 conditions, 6757 events. 4267/6757 cut-off events. For 2545400/2545402 co-relation queries the response was YES. Maximal size of possible extension queue 459. Compared 41597 event pairs, 850 based on Foata normal form. 3/6759 useless extension candidates. Maximal degree in co-relation 75055. Up to 6377 conditions per place. [2024-06-03 19:51:33,217 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 584 selfloop transitions, 28 changer transitions 0/660 dead transitions. [2024-06-03 19:51:33,217 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 489 places, 660 transitions, 7976 flow [2024-06-03 19:51:33,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:51:33,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:51:33,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 160 transitions. [2024-06-03 19:51:33,218 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4134366925064599 [2024-06-03 19:51:33,218 INFO L175 Difference]: Start difference. First operand has 481 places, 638 transitions, 6680 flow. Second operand 9 states and 160 transitions. [2024-06-03 19:51:33,218 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 489 places, 660 transitions, 7976 flow [2024-06-03 19:51:46,293 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 484 places, 660 transitions, 7779 flow, removed 84 selfloop flow, removed 5 redundant places. [2024-06-03 19:51:46,299 INFO L231 Difference]: Finished difference. Result has 485 places, 638 transitions, 6545 flow [2024-06-03 19:51:46,299 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=6483, PETRI_DIFFERENCE_MINUEND_PLACES=476, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=638, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=610, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6545, PETRI_PLACES=485, PETRI_TRANSITIONS=638} [2024-06-03 19:51:46,299 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 441 predicate places. [2024-06-03 19:51:46,299 INFO L495 AbstractCegarLoop]: Abstraction has has 485 places, 638 transitions, 6545 flow [2024-06-03 19:51:46,299 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:51:46,299 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:51:46,299 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:51:46,299 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable166 [2024-06-03 19:51:46,299 INFO L420 AbstractCegarLoop]: === Iteration 168 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:51:46,300 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:51:46,300 INFO L85 PathProgramCache]: Analyzing trace with hash 1542248568, now seen corresponding path program 1 times [2024-06-03 19:51:46,300 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:51:46,300 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1985728158] [2024-06-03 19:51:46,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:51:46,300 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:51:46,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:51:47,178 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:51:47,178 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:51:47,178 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1985728158] [2024-06-03 19:51:47,178 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1985728158] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:51:47,179 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:51:47,179 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:51:47,179 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [835846444] [2024-06-03 19:51:47,179 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:51:47,179 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:51:47,179 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:51:47,179 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:51:47,179 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:51:47,257 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-06-03 19:51:47,257 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 485 places, 638 transitions, 6545 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) [2024-06-03 19:51:47,257 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:51:47,257 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-06-03 19:51:47,257 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:51:49,313 INFO L124 PetriNetUnfolderBase]: 4362/6856 cut-off events. [2024-06-03 19:51:49,313 INFO L125 PetriNetUnfolderBase]: For 2585567/2585569 co-relation queries the response was YES. [2024-06-03 19:51:49,407 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76019 conditions, 6856 events. 4362/6856 cut-off events. For 2585567/2585569 co-relation queries the response was YES. Maximal size of possible extension queue 460. Compared 41774 event pairs, 871 based on Foata normal form. 4/6859 useless extension candidates. Maximal degree in co-relation 75786. Up to 6602 conditions per place. [2024-06-03 19:51:49,436 INFO L140 encePairwiseOnDemand]: 31/43 looper letters, 623 selfloop transitions, 37 changer transitions 0/664 dead transitions. [2024-06-03 19:51:49,436 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 493 places, 664 transitions, 8069 flow [2024-06-03 19:51:49,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:51:49,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:51:49,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 156 transitions. [2024-06-03 19:51:49,437 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40310077519379844 [2024-06-03 19:51:49,437 INFO L175 Difference]: Start difference. First operand has 485 places, 638 transitions, 6545 flow. Second operand 9 states and 156 transitions. [2024-06-03 19:51:49,437 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 493 places, 664 transitions, 8069 flow Killed by 15