./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.2024-06-19_11-23-25.files/mutex-meet-nonrel/mix035_power.opt_rmo.opt.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version eb4cb34f 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.2024-06-19_11-23-25.files/mutex-meet-nonrel/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-eb4cb34-m [2024-06-21 21:00:58,091 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-21 21:00:58,180 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-21 21:00:58,182 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-21 21:00:58,183 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-21 21:00:58,207 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-21 21:00:58,208 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-21 21:00:58,209 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-21 21:00:58,210 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-21 21:00:58,211 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-21 21:00:58,211 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-21 21:00:58,212 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-21 21:00:58,213 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-21 21:00:58,216 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-21 21:00:58,216 INFO L153 SettingsManager]: * Use SBE=true [2024-06-21 21:00:58,217 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-21 21:00:58,218 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-21 21:00:58,218 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-21 21:00:58,218 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-21 21:00:58,219 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-21 21:00:58,219 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-21 21:00:58,219 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-21 21:00:58,219 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-21 21:00:58,220 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-21 21:00:58,220 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-21 21:00:58,220 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-21 21:00:58,221 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-21 21:00:58,221 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-21 21:00:58,221 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-21 21:00:58,222 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-21 21:00:58,223 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-21 21:00:58,223 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-21 21:00:58,223 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-21 21:00:58,223 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-21 21:00:58,223 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-21 21:00:58,224 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-21 21:00:58,224 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-21 21:00:58,224 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-21 21:00:58,224 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-21 21:00:58,224 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-21 21:00:58,225 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-21 21:00:58,225 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-21 21:00:58,225 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-21 21:00:58,225 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-21 21:00:58,467 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-21 21:00:58,493 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-21 21:00:58,495 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-21 21:00:58,496 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-21 21:00:58,497 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-21 21:00:58,498 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-06-19_11-23-25.files/mutex-meet-nonrel/mix035_power.opt_rmo.opt.yml/witness.yml [2024-06-21 21:00:58,684 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-21 21:00:58,684 INFO L274 PluginConnector]: CDTParser initialized [2024-06-21 21:00:58,686 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/mix035_power.opt_rmo.opt.i [2024-06-21 21:00:59,805 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-21 21:01:00,047 INFO L384 CDTParser]: Found 1 translation units. [2024-06-21 21:01:00,047 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/mix035_power.opt_rmo.opt.i [2024-06-21 21:01:00,060 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/756822e2b/5d4b1aa88ed8401092203422fa2efdf8/FLAGffef3b343 [2024-06-21 21:01:00,073 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/756822e2b/5d4b1aa88ed8401092203422fa2efdf8 [2024-06-21 21:01:00,074 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-21 21:01:00,076 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-21 21:01:00,079 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-21 21:01:00,079 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-21 21:01:00,083 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-21 21:01:00,083 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 09:00:58" (1/2) ... [2024-06-21 21:01:00,084 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@705ab7df and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 09:01:00, skipping insertion in model container [2024-06-21 21:01:00,084 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 09:00:58" (1/2) ... [2024-06-21 21:01:00,085 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@3cf88ddb and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 09:01:00, skipping insertion in model container [2024-06-21 21:01:00,086 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.06 09:01:00" (2/2) ... [2024-06-21 21:01:00,086 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@705ab7df and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 09:01:00, skipping insertion in model container [2024-06-21 21:01:00,086 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.06 09:01:00" (2/2) ... [2024-06-21 21:01:00,086 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-21 21:01:00,185 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-21 21:01:00,186 INFO L97 edCorrectnessWitness]: Location invariant before [L847-L847] ((((((((((((((((((((! multithreaded || (x == 0 || x == 1)) && (! multithreaded || (x$w_buff1 == 0 || x$w_buff1 == 1))) && (! multithreaded || (y == 0 || y == 1))) && (! multithreaded || (a == 0 || a == 1))) && (! multithreaded || ((((((((((((((((((((0 <= __unbuffered_cnt && x$flush_delayed == (_Bool)0) && x$r_buff0_thd0 == (_Bool)0) && x$r_buff0_thd1 == (_Bool)0) && x$r_buff0_thd3 == (_Bool)0) && x$r_buff1_thd0 == (_Bool)0) && x$r_buff1_thd1 == (_Bool)0) && x$r_buff1_thd3 == (_Bool)0) && x$read_delayed == (_Bool)0) && x$read_delayed_var == 0) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)) && (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1)) && (a == 0 || a == 1)) && (x == 0 || x == 1)) && (x$mem_tmp == 0 || x$mem_tmp == 1)) && (x$w_buff0 == 0 || x$w_buff0 == 1)) && (x$w_buff1 == 0 || x$w_buff1 == 1)) && (y == 0 || y == 1)) && (z == 0 || z == 1)))) && (! multithreaded || (x$mem_tmp == 0 || x$mem_tmp == 1))) && (! multithreaded || x$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1))) && (! multithreaded || x$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || (x$w_buff0 == 0 || x$w_buff0 == 1))) && (! multithreaded || x$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1))) && (! multithreaded || (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1))) && (! multithreaded || x$read_delayed_var == 0)) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1))) && (! multithreaded || (z == 0 || z == 1))) && (! multithreaded || x$read_delayed == (_Bool)0)) && (! multithreaded || x$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd3 == (_Bool)0) [2024-06-21 21:01:00,186 INFO L97 edCorrectnessWitness]: Location invariant before [L846-L846] ((((((((((((((((((((! multithreaded || (x == 0 || x == 1)) && (! multithreaded || (x$w_buff1 == 0 || x$w_buff1 == 1))) && (! multithreaded || (y == 0 || y == 1))) && (! multithreaded || (a == 0 || a == 1))) && (! multithreaded || ((((((((((((((((((((0 <= __unbuffered_cnt && x$flush_delayed == (_Bool)0) && x$r_buff0_thd0 == (_Bool)0) && x$r_buff0_thd1 == (_Bool)0) && x$r_buff0_thd3 == (_Bool)0) && x$r_buff1_thd0 == (_Bool)0) && x$r_buff1_thd1 == (_Bool)0) && x$r_buff1_thd3 == (_Bool)0) && x$read_delayed == (_Bool)0) && x$read_delayed_var == 0) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)) && (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1)) && (a == 0 || a == 1)) && (x == 0 || x == 1)) && (x$mem_tmp == 0 || x$mem_tmp == 1)) && (x$w_buff0 == 0 || x$w_buff0 == 1)) && (x$w_buff1 == 0 || x$w_buff1 == 1)) && (y == 0 || y == 1)) && (z == 0 || z == 1)))) && (! multithreaded || (x$mem_tmp == 0 || x$mem_tmp == 1))) && (! multithreaded || x$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1))) && (! multithreaded || x$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || (x$w_buff0 == 0 || x$w_buff0 == 1))) && (! multithreaded || x$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1))) && (! multithreaded || (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1))) && (! multithreaded || x$read_delayed_var == 0)) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1))) && (! multithreaded || (z == 0 || z == 1))) && (! multithreaded || x$read_delayed == (_Bool)0)) && (! multithreaded || x$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd3 == (_Bool)0) [2024-06-21 21:01:00,188 INFO L97 edCorrectnessWitness]: Location invariant before [L844-L844] ((((((((((((((((((((! multithreaded || (x == 0 || x == 1)) && (! multithreaded || (x$w_buff1 == 0 || x$w_buff1 == 1))) && (! multithreaded || (y == 0 || y == 1))) && (! multithreaded || (a == 0 || a == 1))) && (! multithreaded || ((((((((((((((((((((0 <= __unbuffered_cnt && x$flush_delayed == (_Bool)0) && x$r_buff0_thd0 == (_Bool)0) && x$r_buff0_thd1 == (_Bool)0) && x$r_buff0_thd3 == (_Bool)0) && x$r_buff1_thd0 == (_Bool)0) && x$r_buff1_thd1 == (_Bool)0) && x$r_buff1_thd3 == (_Bool)0) && x$read_delayed == (_Bool)0) && x$read_delayed_var == 0) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)) && (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1)) && (a == 0 || a == 1)) && (x == 0 || x == 1)) && (x$mem_tmp == 0 || x$mem_tmp == 1)) && (x$w_buff0 == 0 || x$w_buff0 == 1)) && (x$w_buff1 == 0 || x$w_buff1 == 1)) && (y == 0 || y == 1)) && (z == 0 || z == 1)))) && (! multithreaded || (x$mem_tmp == 0 || x$mem_tmp == 1))) && (! multithreaded || x$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1))) && (! multithreaded || x$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || (x$w_buff0 == 0 || x$w_buff0 == 1))) && (! multithreaded || x$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1))) && (! multithreaded || (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1))) && (! multithreaded || x$read_delayed_var == 0)) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1))) && (! multithreaded || (z == 0 || z == 1))) && (! multithreaded || x$read_delayed == (_Bool)0)) && (! multithreaded || x$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd3 == (_Bool)0) [2024-06-21 21:01:00,188 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-21 21:01:00,188 INFO L106 edCorrectnessWitness]: ghost_update [L842-L842] multithreaded = 1; [2024-06-21 21:01:00,237 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-21 21:01:00,673 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-21 21:01:00,684 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-21 21:01:00,832 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-21 21:01:00,866 INFO L206 MainTranslator]: Completed translation [2024-06-21 21:01:00,866 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 09:01:00 WrapperNode [2024-06-21 21:01:00,866 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-21 21:01:00,867 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-21 21:01:00,867 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-21 21:01:00,868 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-21 21:01:00,873 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 09:01:00" (1/1) ... [2024-06-21 21:01:00,889 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 09:01:00" (1/1) ... [2024-06-21 21:01:00,926 INFO L138 Inliner]: procedures = 175, calls = 47, calls flagged for inlining = 6, calls inlined = 7, statements flattened = 128 [2024-06-21 21:01:00,926 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-21 21:01:00,927 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-21 21:01:00,927 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-21 21:01:00,927 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-21 21:01:00,937 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 09:01:00" (1/1) ... [2024-06-21 21:01:00,937 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 09:01:00" (1/1) ... [2024-06-21 21:01:00,941 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 09:01:00" (1/1) ... [2024-06-21 21:01:00,955 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]. [2024-06-21 21:01:00,956 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 09:01:00" (1/1) ... [2024-06-21 21:01:00,956 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 09:01:00" (1/1) ... [2024-06-21 21:01:00,969 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 09:01:00" (1/1) ... [2024-06-21 21:01:00,971 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 09:01:00" (1/1) ... [2024-06-21 21:01:00,972 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 09:01:00" (1/1) ... [2024-06-21 21:01:00,974 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 09:01:00" (1/1) ... [2024-06-21 21:01:00,977 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-21 21:01:00,978 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-21 21:01:00,978 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-21 21:01:00,978 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-21 21:01:00,979 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 09:01:00" (1/1) ... [2024-06-21 21:01:00,984 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-21 21:01:00,992 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-21 21:01:01,007 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) [2024-06-21 21:01:01,010 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 [2024-06-21 21:01:01,047 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-21 21:01:01,048 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-21 21:01:01,048 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-21 21:01:01,048 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-21 21:01:01,048 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-21 21:01:01,049 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-21 21:01:01,049 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-21 21:01:01,049 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-21 21:01:01,049 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-21 21:01:01,049 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-21 21:01:01,050 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-21 21:01:01,050 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-21 21:01:01,051 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-21 21:01:01,167 INFO L244 CfgBuilder]: Building ICFG [2024-06-21 21:01:01,169 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-21 21:01:01,546 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-21 21:01:01,550 INFO L293 CfgBuilder]: Performing block encoding [2024-06-21 21:01:01,723 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-21 21:01:01,724 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-21 21:01:01,724 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.06 09:01:01 BoogieIcfgContainer [2024-06-21 21:01:01,725 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-21 21:01:01,728 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-21 21:01:01,728 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-21 21:01:01,731 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-21 21:01:01,732 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 09:00:58" (1/4) ... [2024-06-21 21:01:01,732 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@61709744 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 21.06 09:01:01, skipping insertion in model container [2024-06-21 21:01:01,732 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.06 09:01:00" (2/4) ... [2024-06-21 21:01:01,733 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@61709744 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.06 09:01:01, skipping insertion in model container [2024-06-21 21:01:01,733 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 09:01:00" (3/4) ... [2024-06-21 21:01:01,734 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@61709744 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.06 09:01:01, skipping insertion in model container [2024-06-21 21:01:01,734 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.06 09:01:01" (4/4) ... [2024-06-21 21:01:01,735 INFO L112 eAbstractionObserver]: Analyzing ICFG mix035_power.opt_rmo.opt.i [2024-06-21 21:01:01,752 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-21 21:01:01,753 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2024-06-21 21:01:01,753 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-21 21:01:01,809 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-21 21:01:01,844 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 52 places, 42 transitions, 96 flow [2024-06-21 21:01:01,875 INFO L124 PetriNetUnfolderBase]: 0/39 cut-off events. [2024-06-21 21:01:01,875 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-21 21:01:01,877 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49 conditions, 39 events. 0/39 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 64 event pairs, 0 based on Foata normal form. 0/36 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2024-06-21 21:01:01,878 INFO L82 GeneralOperation]: Start removeDead. Operand has 52 places, 42 transitions, 96 flow [2024-06-21 21:01:01,881 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 43 places, 33 transitions, 75 flow [2024-06-21 21:01:01,897 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-21 21:01:01,903 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;@471f4072, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-21 21:01:01,904 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2024-06-21 21:01:01,910 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-21 21:01:01,910 INFO L124 PetriNetUnfolderBase]: 0/5 cut-off events. [2024-06-21 21:01:01,910 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-21 21:01:01,911 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:01:01,911 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-06-21 21:01:01,911 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)] === [2024-06-21 21:01:01,916 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:01:01,916 INFO L85 PathProgramCache]: Analyzing trace with hash 371757946, now seen corresponding path program 1 times [2024-06-21 21:01:01,929 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:01:01,929 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [545015688] [2024-06-21 21:01:01,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:01:01,930 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:01:02,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:01:03,078 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:01:03,078 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:01:03,079 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [545015688] [2024-06-21 21:01:03,079 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [545015688] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:01:03,080 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:01:03,080 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-21 21:01:03,081 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [884076329] [2024-06-21 21:01:03,082 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:01:03,089 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-21 21:01:03,094 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:01:03,119 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-21 21:01:03,120 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-21 21:01:03,162 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 42 [2024-06-21 21:01:03,164 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 33 transitions, 75 flow. Second operand has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 3 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:01:03,165 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:01:03,165 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 42 [2024-06-21 21:01:03,166 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:01:03,559 INFO L124 PetriNetUnfolderBase]: 1116/1796 cut-off events. [2024-06-21 21:01:03,560 INFO L125 PetriNetUnfolderBase]: For 29/29 co-relation queries the response was YES. [2024-06-21 21:01:03,567 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3547 conditions, 1796 events. 1116/1796 cut-off events. For 29/29 co-relation queries the response was YES. Maximal size of possible extension queue 83. Compared 8974 event pairs, 765 based on Foata normal form. 1/1731 useless extension candidates. Maximal degree in co-relation 3535. Up to 1676 conditions per place. [2024-06-21 21:01:03,578 INFO L140 encePairwiseOnDemand]: 35/42 looper letters, 31 selfloop transitions, 4 changer transitions 0/43 dead transitions. [2024-06-21 21:01:03,578 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 43 transitions, 171 flow [2024-06-21 21:01:03,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-21 21:01:03,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-21 21:01:03,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 80 transitions. [2024-06-21 21:01:03,590 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6349206349206349 [2024-06-21 21:01:03,592 INFO L175 Difference]: Start difference. First operand has 43 places, 33 transitions, 75 flow. Second operand 3 states and 80 transitions. [2024-06-21 21:01:03,593 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 43 transitions, 171 flow [2024-06-21 21:01:03,596 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 43 transitions, 166 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-21 21:01:03,599 INFO L231 Difference]: Finished difference. Result has 43 places, 36 transitions, 102 flow [2024-06-21 21:01:03,601 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=72, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=102, PETRI_PLACES=43, PETRI_TRANSITIONS=36} [2024-06-21 21:01:03,603 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 0 predicate places. [2024-06-21 21:01:03,603 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 36 transitions, 102 flow [2024-06-21 21:01:03,604 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 3 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:01:03,604 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:01:03,604 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:01:03,604 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-21 21:01:03,604 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)] === [2024-06-21 21:01:03,605 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:01:03,605 INFO L85 PathProgramCache]: Analyzing trace with hash 777140057, now seen corresponding path program 1 times [2024-06-21 21:01:03,605 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:01:03,606 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1925337951] [2024-06-21 21:01:03,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:01:03,606 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:01:03,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:01:04,325 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:01:04,326 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:01:04,326 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1925337951] [2024-06-21 21:01:04,326 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1925337951] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:01:04,327 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:01:04,327 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-21 21:01:04,327 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1056750663] [2024-06-21 21:01:04,328 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:01:04,329 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-21 21:01:04,330 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:01:04,330 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-21 21:01:04,330 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-21 21:01:04,396 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 42 [2024-06-21 21:01:04,397 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 36 transitions, 102 flow. Second operand has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:01:04,397 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:01:04,397 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 42 [2024-06-21 21:01:04,398 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:01:04,736 INFO L124 PetriNetUnfolderBase]: 1274/1990 cut-off events. [2024-06-21 21:01:04,736 INFO L125 PetriNetUnfolderBase]: For 384/384 co-relation queries the response was YES. [2024-06-21 21:01:04,739 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4496 conditions, 1990 events. 1274/1990 cut-off events. For 384/384 co-relation queries the response was YES. Maximal size of possible extension queue 94. Compared 9739 event pairs, 608 based on Foata normal form. 6/1964 useless extension candidates. Maximal degree in co-relation 4484. Up to 1873 conditions per place. [2024-06-21 21:01:04,748 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 40 selfloop transitions, 7 changer transitions 0/54 dead transitions. [2024-06-21 21:01:04,748 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 54 transitions, 244 flow [2024-06-21 21:01:04,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-21 21:01:04,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-21 21:01:04,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 102 transitions. [2024-06-21 21:01:04,750 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6071428571428571 [2024-06-21 21:01:04,750 INFO L175 Difference]: Start difference. First operand has 43 places, 36 transitions, 102 flow. Second operand 4 states and 102 transitions. [2024-06-21 21:01:04,751 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 54 transitions, 244 flow [2024-06-21 21:01:04,751 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 54 transitions, 240 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-21 21:01:04,753 INFO L231 Difference]: Finished difference. Result has 46 places, 39 transitions, 138 flow [2024-06-21 21:01:04,753 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=98, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=138, PETRI_PLACES=46, PETRI_TRANSITIONS=39} [2024-06-21 21:01:04,754 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 3 predicate places. [2024-06-21 21:01:04,754 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 39 transitions, 138 flow [2024-06-21 21:01:04,754 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:01:04,754 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:01:04,754 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:01:04,755 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-21 21:01:04,755 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)] === [2024-06-21 21:01:04,755 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:01:04,755 INFO L85 PathProgramCache]: Analyzing trace with hash 1907000598, now seen corresponding path program 1 times [2024-06-21 21:01:04,756 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:01:04,756 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [82551724] [2024-06-21 21:01:04,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:01:04,756 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:01:04,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:01:06,061 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:01:06,061 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:01:06,061 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [82551724] [2024-06-21 21:01:06,062 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [82551724] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:01:06,062 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:01:06,063 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 21:01:06,063 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [375645721] [2024-06-21 21:01:06,063 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:01:06,063 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 21:01:06,064 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:01:06,064 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 21:01:06,065 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-06-21 21:01:06,157 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 42 [2024-06-21 21:01:06,159 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 39 transitions, 138 flow. Second operand has 6 states, 6 states have (on average 14.166666666666666) internal successors, (85), 6 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:01:06,159 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:01:06,159 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 42 [2024-06-21 21:01:06,159 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:01:06,684 INFO L124 PetriNetUnfolderBase]: 1265/1973 cut-off events. [2024-06-21 21:01:06,685 INFO L125 PetriNetUnfolderBase]: For 1078/1078 co-relation queries the response was YES. [2024-06-21 21:01:06,688 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4970 conditions, 1973 events. 1265/1973 cut-off events. For 1078/1078 co-relation queries the response was YES. Maximal size of possible extension queue 94. Compared 9651 event pairs, 445 based on Foata normal form. 6/1947 useless extension candidates. Maximal degree in co-relation 4956. Up to 1828 conditions per place. [2024-06-21 21:01:06,699 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 50 selfloop transitions, 12 changer transitions 0/69 dead transitions. [2024-06-21 21:01:06,699 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 69 transitions, 350 flow [2024-06-21 21:01:06,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 21:01:06,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 21:01:06,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 143 transitions. [2024-06-21 21:01:06,705 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5674603174603174 [2024-06-21 21:01:06,705 INFO L175 Difference]: Start difference. First operand has 46 places, 39 transitions, 138 flow. Second operand 6 states and 143 transitions. [2024-06-21 21:01:06,705 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 69 transitions, 350 flow [2024-06-21 21:01:06,708 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 69 transitions, 330 flow, removed 4 selfloop flow, removed 2 redundant places. [2024-06-21 21:01:06,709 INFO L231 Difference]: Finished difference. Result has 50 places, 43 transitions, 181 flow [2024-06-21 21:01:06,709 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=118, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=181, PETRI_PLACES=50, PETRI_TRANSITIONS=43} [2024-06-21 21:01:06,711 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 7 predicate places. [2024-06-21 21:01:06,711 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 43 transitions, 181 flow [2024-06-21 21:01:06,711 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.166666666666666) internal successors, (85), 6 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:01:06,712 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:01:06,712 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:01:06,712 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-21 21:01:06,712 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)] === [2024-06-21 21:01:06,712 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:01:06,713 INFO L85 PathProgramCache]: Analyzing trace with hash 1123968294, now seen corresponding path program 1 times [2024-06-21 21:01:06,713 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:01:06,713 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1634241359] [2024-06-21 21:01:06,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:01:06,714 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:01:06,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:01:07,513 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:01:07,514 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:01:07,514 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1634241359] [2024-06-21 21:01:07,514 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1634241359] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:01:07,515 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:01:07,515 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 21:01:07,515 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [858200768] [2024-06-21 21:01:07,515 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:01:07,516 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 21:01:07,516 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:01:07,517 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 21:01:07,517 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-21 21:01:07,654 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-21 21:01:07,655 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 43 transitions, 181 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) [2024-06-21 21:01:07,655 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:01:07,657 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-21 21:01:07,657 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:01:08,042 INFO L124 PetriNetUnfolderBase]: 1090/1819 cut-off events. [2024-06-21 21:01:08,042 INFO L125 PetriNetUnfolderBase]: For 1770/1770 co-relation queries the response was YES. [2024-06-21 21:01:08,046 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4894 conditions, 1819 events. 1090/1819 cut-off events. For 1770/1770 co-relation queries the response was YES. Maximal size of possible extension queue 87. Compared 9430 event pairs, 460 based on Foata normal form. 2/1813 useless extension candidates. Maximal degree in co-relation 4877. Up to 1627 conditions per place. [2024-06-21 21:01:08,054 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 42 selfloop transitions, 8 changer transitions 0/57 dead transitions. [2024-06-21 21:01:08,054 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 57 transitions, 323 flow [2024-06-21 21:01:08,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 21:01:08,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 21:01:08,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 104 transitions. [2024-06-21 21:01:08,057 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49523809523809526 [2024-06-21 21:01:08,057 INFO L175 Difference]: Start difference. First operand has 50 places, 43 transitions, 181 flow. Second operand 5 states and 104 transitions. [2024-06-21 21:01:08,057 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 57 transitions, 323 flow [2024-06-21 21:01:08,061 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 57 transitions, 296 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-06-21 21:01:08,063 INFO L231 Difference]: Finished difference. Result has 52 places, 46 transitions, 198 flow [2024-06-21 21:01:08,063 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=154, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=198, PETRI_PLACES=52, PETRI_TRANSITIONS=46} [2024-06-21 21:01:08,064 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 9 predicate places. [2024-06-21 21:01:08,065 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 46 transitions, 198 flow [2024-06-21 21:01:08,065 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) [2024-06-21 21:01:08,065 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:01:08,065 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:01:08,065 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-21 21:01:08,066 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)] === [2024-06-21 21:01:08,066 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:01:08,066 INFO L85 PathProgramCache]: Analyzing trace with hash 1841701687, now seen corresponding path program 1 times [2024-06-21 21:01:08,066 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:01:08,066 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [989356229] [2024-06-21 21:01:08,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:01:08,067 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:01:08,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:01:08,955 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:01:08,955 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:01:08,955 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [989356229] [2024-06-21 21:01:08,956 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [989356229] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:01:08,956 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:01:08,956 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 21:01:08,956 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1460388225] [2024-06-21 21:01:08,956 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:01:08,957 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 21:01:08,957 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:01:08,957 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 21:01:08,957 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-21 21:01:09,098 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-21 21:01:09,098 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 46 transitions, 198 flow. Second operand has 7 states, 7 states have (on average 12.428571428571429) internal successors, (87), 7 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:01:09,098 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:01:09,098 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-21 21:01:09,099 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:01:09,547 INFO L124 PetriNetUnfolderBase]: 1294/2057 cut-off events. [2024-06-21 21:01:09,547 INFO L125 PetriNetUnfolderBase]: For 3114/3116 co-relation queries the response was YES. [2024-06-21 21:01:09,553 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6106 conditions, 2057 events. 1294/2057 cut-off events. For 3114/3116 co-relation queries the response was YES. Maximal size of possible extension queue 92. Compared 10234 event pairs, 543 based on Foata normal form. 6/2054 useless extension candidates. Maximal degree in co-relation 6087. Up to 1893 conditions per place. [2024-06-21 21:01:09,563 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 49 selfloop transitions, 16 changer transitions 0/71 dead transitions. [2024-06-21 21:01:09,564 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 71 transitions, 421 flow [2024-06-21 21:01:09,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 21:01:09,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 21:01:09,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 134 transitions. [2024-06-21 21:01:09,565 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4557823129251701 [2024-06-21 21:01:09,566 INFO L175 Difference]: Start difference. First operand has 52 places, 46 transitions, 198 flow. Second operand 7 states and 134 transitions. [2024-06-21 21:01:09,566 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 71 transitions, 421 flow [2024-06-21 21:01:09,570 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 71 transitions, 399 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-06-21 21:01:09,574 INFO L231 Difference]: Finished difference. Result has 58 places, 55 transitions, 285 flow [2024-06-21 21:01:09,574 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=178, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=285, PETRI_PLACES=58, PETRI_TRANSITIONS=55} [2024-06-21 21:01:09,576 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 15 predicate places. [2024-06-21 21:01:09,576 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 55 transitions, 285 flow [2024-06-21 21:01:09,577 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.428571428571429) internal successors, (87), 7 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:01:09,581 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:01:09,581 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:01:09,581 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-21 21:01:09,581 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)] === [2024-06-21 21:01:09,582 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:01:09,582 INFO L85 PathProgramCache]: Analyzing trace with hash -300447945, now seen corresponding path program 2 times [2024-06-21 21:01:09,582 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:01:09,582 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1393970627] [2024-06-21 21:01:09,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:01:09,583 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:01:09,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:01:10,474 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:01:10,475 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:01:10,475 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1393970627] [2024-06-21 21:01:10,475 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1393970627] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:01:10,476 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:01:10,476 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 21:01:10,476 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1456077402] [2024-06-21 21:01:10,476 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:01:10,476 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 21:01:10,477 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:01:10,477 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 21:01:10,477 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-21 21:01:10,560 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-21 21:01:10,561 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 55 transitions, 285 flow. Second operand has 7 states, 7 states have (on average 12.428571428571429) internal successors, (87), 7 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:01:10,561 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:01:10,561 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-21 21:01:10,561 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:01:11,045 INFO L124 PetriNetUnfolderBase]: 1337/2125 cut-off events. [2024-06-21 21:01:11,045 INFO L125 PetriNetUnfolderBase]: For 4710/4710 co-relation queries the response was YES. [2024-06-21 21:01:11,050 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6946 conditions, 2125 events. 1337/2125 cut-off events. For 4710/4710 co-relation queries the response was YES. Maximal size of possible extension queue 92. Compared 10592 event pairs, 530 based on Foata normal form. 4/2116 useless extension candidates. Maximal degree in co-relation 6924. Up to 1943 conditions per place. [2024-06-21 21:01:11,061 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 57 selfloop transitions, 24 changer transitions 0/87 dead transitions. [2024-06-21 21:01:11,061 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 87 transitions, 586 flow [2024-06-21 21:01:11,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 21:01:11,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 21:01:11,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 141 transitions. [2024-06-21 21:01:11,063 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47959183673469385 [2024-06-21 21:01:11,063 INFO L175 Difference]: Start difference. First operand has 58 places, 55 transitions, 285 flow. Second operand 7 states and 141 transitions. [2024-06-21 21:01:11,063 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 87 transitions, 586 flow [2024-06-21 21:01:11,067 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 87 transitions, 543 flow, removed 12 selfloop flow, removed 2 redundant places. [2024-06-21 21:01:11,068 INFO L231 Difference]: Finished difference. Result has 64 places, 66 transitions, 407 flow [2024-06-21 21:01:11,068 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=259, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=407, PETRI_PLACES=64, PETRI_TRANSITIONS=66} [2024-06-21 21:01:11,069 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 21 predicate places. [2024-06-21 21:01:11,069 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 66 transitions, 407 flow [2024-06-21 21:01:11,070 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.428571428571429) internal successors, (87), 7 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:01:11,070 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:01:11,070 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:01:11,070 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-21 21:01:11,070 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)] === [2024-06-21 21:01:11,071 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:01:11,071 INFO L85 PathProgramCache]: Analyzing trace with hash 1847415607, now seen corresponding path program 3 times [2024-06-21 21:01:11,071 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:01:11,071 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [872768419] [2024-06-21 21:01:11,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:01:11,072 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:01:11,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:01:11,963 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:01:11,964 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:01:11,964 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [872768419] [2024-06-21 21:01:11,965 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [872768419] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:01:11,965 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:01:11,965 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 21:01:11,965 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [527508230] [2024-06-21 21:01:11,965 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:01:11,966 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 21:01:11,966 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:01:11,966 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 21:01:11,966 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-21 21:01:12,049 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-21 21:01:12,050 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 66 transitions, 407 flow. Second operand has 7 states, 7 states have (on average 12.428571428571429) internal successors, (87), 7 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:01:12,050 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:01:12,050 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-21 21:01:12,050 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:01:12,494 INFO L124 PetriNetUnfolderBase]: 1343/2146 cut-off events. [2024-06-21 21:01:12,494 INFO L125 PetriNetUnfolderBase]: For 6739/6741 co-relation queries the response was YES. [2024-06-21 21:01:12,500 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7539 conditions, 2146 events. 1343/2146 cut-off events. For 6739/6741 co-relation queries the response was YES. Maximal size of possible extension queue 92. Compared 10794 event pairs, 526 based on Foata normal form. 6/2141 useless extension candidates. Maximal degree in co-relation 7514. Up to 1907 conditions per place. [2024-06-21 21:01:12,517 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 48 selfloop transitions, 31 changer transitions 0/85 dead transitions. [2024-06-21 21:01:12,517 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 85 transitions, 645 flow [2024-06-21 21:01:12,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 21:01:12,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 21:01:12,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 135 transitions. [2024-06-21 21:01:12,519 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45918367346938777 [2024-06-21 21:01:12,519 INFO L175 Difference]: Start difference. First operand has 64 places, 66 transitions, 407 flow. Second operand 7 states and 135 transitions. [2024-06-21 21:01:12,519 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 85 transitions, 645 flow [2024-06-21 21:01:12,523 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 85 transitions, 597 flow, removed 6 selfloop flow, removed 4 redundant places. [2024-06-21 21:01:12,526 INFO L231 Difference]: Finished difference. Result has 67 places, 69 transitions, 465 flow [2024-06-21 21:01:12,526 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=359, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=465, PETRI_PLACES=67, PETRI_TRANSITIONS=69} [2024-06-21 21:01:12,527 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 24 predicate places. [2024-06-21 21:01:12,527 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 69 transitions, 465 flow [2024-06-21 21:01:12,527 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.428571428571429) internal successors, (87), 7 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:01:12,527 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:01:12,528 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:01:12,528 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-21 21:01:12,528 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)] === [2024-06-21 21:01:12,528 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:01:12,528 INFO L85 PathProgramCache]: Analyzing trace with hash 2096774213, now seen corresponding path program 1 times [2024-06-21 21:01:12,529 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:01:12,529 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [602450675] [2024-06-21 21:01:12,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:01:12,529 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:01:12,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:01:13,640 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:01:13,640 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:01:13,641 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [602450675] [2024-06-21 21:01:13,641 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [602450675] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:01:13,641 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:01:13,641 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 21:01:13,641 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [277086830] [2024-06-21 21:01:13,641 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:01:13,641 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 21:01:13,642 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:01:13,642 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 21:01:13,642 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-21 21:01:13,777 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-21 21:01:13,777 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 69 transitions, 465 flow. Second operand has 8 states, 8 states have (on average 12.375) internal successors, (99), 8 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:01:13,777 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:01:13,778 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-21 21:01:13,778 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:01:14,262 INFO L124 PetriNetUnfolderBase]: 1470/2394 cut-off events. [2024-06-21 21:01:14,262 INFO L125 PetriNetUnfolderBase]: For 8917/8917 co-relation queries the response was YES. [2024-06-21 21:01:14,270 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8685 conditions, 2394 events. 1470/2394 cut-off events. For 8917/8917 co-relation queries the response was YES. Maximal size of possible extension queue 97. Compared 12326 event pairs, 572 based on Foata normal form. 2/2384 useless extension candidates. Maximal degree in co-relation 8659. Up to 2162 conditions per place. [2024-06-21 21:01:14,287 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 72 selfloop transitions, 15 changer transitions 0/93 dead transitions. [2024-06-21 21:01:14,289 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 93 transitions, 732 flow [2024-06-21 21:01:14,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 21:01:14,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 21:01:14,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 136 transitions. [2024-06-21 21:01:14,291 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46258503401360546 [2024-06-21 21:01:14,292 INFO L175 Difference]: Start difference. First operand has 67 places, 69 transitions, 465 flow. Second operand 7 states and 136 transitions. [2024-06-21 21:01:14,292 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 93 transitions, 732 flow [2024-06-21 21:01:14,300 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 93 transitions, 647 flow, removed 12 selfloop flow, removed 5 redundant places. [2024-06-21 21:01:14,302 INFO L231 Difference]: Finished difference. Result has 70 places, 75 transitions, 469 flow [2024-06-21 21:01:14,303 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=383, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=469, PETRI_PLACES=70, PETRI_TRANSITIONS=75} [2024-06-21 21:01:14,305 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 27 predicate places. [2024-06-21 21:01:14,305 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 75 transitions, 469 flow [2024-06-21 21:01:14,305 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.375) internal successors, (99), 8 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:01:14,306 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:01:14,306 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:01:14,306 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-21 21:01:14,306 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)] === [2024-06-21 21:01:14,306 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:01:14,307 INFO L85 PathProgramCache]: Analyzing trace with hash -1241855871, now seen corresponding path program 1 times [2024-06-21 21:01:14,307 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:01:14,307 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1699021519] [2024-06-21 21:01:14,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:01:14,307 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:01:14,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:01:15,545 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:01:15,546 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:01:15,546 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1699021519] [2024-06-21 21:01:15,546 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1699021519] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:01:15,546 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:01:15,547 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 21:01:15,547 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1535960113] [2024-06-21 21:01:15,547 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:01:15,547 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 21:01:15,547 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:01:15,548 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 21:01:15,548 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 21:01:15,710 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-21 21:01:15,711 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 75 transitions, 469 flow. Second operand has 8 states, 8 states have (on average 12.375) internal successors, (99), 8 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:01:15,711 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:01:15,711 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-21 21:01:15,711 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:01:16,287 INFO L124 PetriNetUnfolderBase]: 1531/2429 cut-off events. [2024-06-21 21:01:16,287 INFO L125 PetriNetUnfolderBase]: For 11651/11651 co-relation queries the response was YES. [2024-06-21 21:01:16,294 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9601 conditions, 2429 events. 1531/2429 cut-off events. For 11651/11651 co-relation queries the response was YES. Maximal size of possible extension queue 108. Compared 12406 event pairs, 568 based on Foata normal form. 2/2401 useless extension candidates. Maximal degree in co-relation 9573. Up to 2219 conditions per place. [2024-06-21 21:01:16,306 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 72 selfloop transitions, 22 changer transitions 0/101 dead transitions. [2024-06-21 21:01:16,306 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 101 transitions, 765 flow [2024-06-21 21:01:16,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 21:01:16,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 21:01:16,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 142 transitions. [2024-06-21 21:01:16,308 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48299319727891155 [2024-06-21 21:01:16,308 INFO L175 Difference]: Start difference. First operand has 70 places, 75 transitions, 469 flow. Second operand 7 states and 142 transitions. [2024-06-21 21:01:16,308 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 101 transitions, 765 flow [2024-06-21 21:01:16,316 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 101 transitions, 723 flow, removed 9 selfloop flow, removed 4 redundant places. [2024-06-21 21:01:16,320 INFO L231 Difference]: Finished difference. Result has 73 places, 78 transitions, 523 flow [2024-06-21 21:01:16,320 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=427, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=523, PETRI_PLACES=73, PETRI_TRANSITIONS=78} [2024-06-21 21:01:16,321 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 30 predicate places. [2024-06-21 21:01:16,321 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 78 transitions, 523 flow [2024-06-21 21:01:16,321 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.375) internal successors, (99), 8 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:01:16,321 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:01:16,321 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:01:16,322 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-21 21:01:16,322 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:01:16,322 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:01:16,322 INFO L85 PathProgramCache]: Analyzing trace with hash 1435556139, now seen corresponding path program 1 times [2024-06-21 21:01:16,322 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:01:16,325 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1457341360] [2024-06-21 21:01:16,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:01:16,325 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:01:16,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:01:17,625 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:01:17,626 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:01:17,626 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1457341360] [2024-06-21 21:01:17,626 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1457341360] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:01:17,626 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:01:17,626 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:01:17,626 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1913168981] [2024-06-21 21:01:17,626 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:01:17,626 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:01:17,627 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:01:17,627 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:01:17,627 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:01:17,820 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-21 21:01:17,821 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 78 transitions, 523 flow. Second operand has 9 states, 9 states have (on average 12.333333333333334) internal successors, (111), 9 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:01:17,821 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:01:17,821 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-21 21:01:17,821 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:01:18,331 INFO L124 PetriNetUnfolderBase]: 1452/2355 cut-off events. [2024-06-21 21:01:18,331 INFO L125 PetriNetUnfolderBase]: For 12710/12710 co-relation queries the response was YES. [2024-06-21 21:01:18,338 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9360 conditions, 2355 events. 1452/2355 cut-off events. For 12710/12710 co-relation queries the response was YES. Maximal size of possible extension queue 96. Compared 11966 event pairs, 537 based on Foata normal form. 4/2343 useless extension candidates. Maximal degree in co-relation 9331. Up to 2118 conditions per place. [2024-06-21 21:01:18,348 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 80 selfloop transitions, 17 changer transitions 0/103 dead transitions. [2024-06-21 21:01:18,348 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 103 transitions, 813 flow [2024-06-21 21:01:18,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:01:18,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:01:18,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 154 transitions. [2024-06-21 21:01:18,350 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4583333333333333 [2024-06-21 21:01:18,350 INFO L175 Difference]: Start difference. First operand has 73 places, 78 transitions, 523 flow. Second operand 8 states and 154 transitions. [2024-06-21 21:01:18,351 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 103 transitions, 813 flow [2024-06-21 21:01:18,360 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 103 transitions, 741 flow, removed 16 selfloop flow, removed 5 redundant places. [2024-06-21 21:01:18,361 INFO L231 Difference]: Finished difference. Result has 76 places, 80 transitions, 524 flow [2024-06-21 21:01:18,362 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=451, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=524, PETRI_PLACES=76, PETRI_TRANSITIONS=80} [2024-06-21 21:01:18,363 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 33 predicate places. [2024-06-21 21:01:18,364 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 80 transitions, 524 flow [2024-06-21 21:01:18,364 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.333333333333334) internal successors, (111), 9 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:01:18,364 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:01:18,364 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:01:18,364 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-21 21:01:18,365 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:01:18,365 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:01:18,365 INFO L85 PathProgramCache]: Analyzing trace with hash 851056793, now seen corresponding path program 1 times [2024-06-21 21:01:18,365 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:01:18,365 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1125742631] [2024-06-21 21:01:18,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:01:18,366 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:01:18,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:01:19,175 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:01:19,175 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:01:19,175 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1125742631] [2024-06-21 21:01:19,176 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1125742631] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:01:19,176 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:01:19,176 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 21:01:19,176 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [963937567] [2024-06-21 21:01:19,176 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:01:19,176 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 21:01:19,177 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:01:19,177 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 21:01:19,177 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2024-06-21 21:01:19,255 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-21 21:01:19,255 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 80 transitions, 524 flow. Second operand has 7 states, 7 states have (on average 12.714285714285714) internal successors, (89), 7 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:01:19,255 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:01:19,255 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-21 21:01:19,255 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:01:19,762 INFO L124 PetriNetUnfolderBase]: 1449/2351 cut-off events. [2024-06-21 21:01:19,763 INFO L125 PetriNetUnfolderBase]: For 14543/14543 co-relation queries the response was YES. [2024-06-21 21:01:19,770 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9563 conditions, 2351 events. 1449/2351 cut-off events. For 14543/14543 co-relation queries the response was YES. Maximal size of possible extension queue 96. Compared 11913 event pairs, 551 based on Foata normal form. 1/2336 useless extension candidates. Maximal degree in co-relation 9533. Up to 2156 conditions per place. [2024-06-21 21:01:19,781 INFO L140 encePairwiseOnDemand]: 35/42 looper letters, 75 selfloop transitions, 9 changer transitions 0/90 dead transitions. [2024-06-21 21:01:19,781 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 90 transitions, 732 flow [2024-06-21 21:01:19,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 21:01:19,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 21:01:19,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 96 transitions. [2024-06-21 21:01:19,782 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45714285714285713 [2024-06-21 21:01:19,782 INFO L175 Difference]: Start difference. First operand has 76 places, 80 transitions, 524 flow. Second operand 5 states and 96 transitions. [2024-06-21 21:01:19,783 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 90 transitions, 732 flow [2024-06-21 21:01:19,800 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 90 transitions, 677 flow, removed 12 selfloop flow, removed 6 redundant places. [2024-06-21 21:01:19,802 INFO L231 Difference]: Finished difference. Result has 75 places, 83 transitions, 519 flow [2024-06-21 21:01:19,802 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=469, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=519, PETRI_PLACES=75, PETRI_TRANSITIONS=83} [2024-06-21 21:01:19,803 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 32 predicate places. [2024-06-21 21:01:19,803 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 83 transitions, 519 flow [2024-06-21 21:01:19,803 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.714285714285714) internal successors, (89), 7 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:01:19,803 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:01:19,803 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:01:19,803 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-21 21:01:19,804 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)] === [2024-06-21 21:01:19,804 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:01:19,804 INFO L85 PathProgramCache]: Analyzing trace with hash 348830230, now seen corresponding path program 1 times [2024-06-21 21:01:19,804 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:01:19,804 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1881092364] [2024-06-21 21:01:19,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:01:19,805 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:01:19,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:01:20,870 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:01:20,870 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:01:20,870 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1881092364] [2024-06-21 21:01:20,870 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1881092364] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:01:20,870 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:01:20,871 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:01:20,871 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [428380748] [2024-06-21 21:01:20,871 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:01:20,871 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:01:20,871 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:01:20,871 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:01:20,872 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:01:20,963 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 21:01:20,963 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 83 transitions, 519 flow. Second operand has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:01:20,963 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:01:20,963 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 21:01:20,963 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:01:21,485 INFO L124 PetriNetUnfolderBase]: 1667/2593 cut-off events. [2024-06-21 21:01:21,485 INFO L125 PetriNetUnfolderBase]: For 19246/19246 co-relation queries the response was YES. [2024-06-21 21:01:21,492 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11157 conditions, 2593 events. 1667/2593 cut-off events. For 19246/19246 co-relation queries the response was YES. Maximal size of possible extension queue 105. Compared 12657 event pairs, 563 based on Foata normal form. 2/2593 useless extension candidates. Maximal degree in co-relation 11126. Up to 2387 conditions per place. [2024-06-21 21:01:21,505 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 86 selfloop transitions, 31 changer transitions 0/122 dead transitions. [2024-06-21 21:01:21,505 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 122 transitions, 921 flow [2024-06-21 21:01:21,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:01:21,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:01:21,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 150 transitions. [2024-06-21 21:01:21,507 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44642857142857145 [2024-06-21 21:01:21,507 INFO L175 Difference]: Start difference. First operand has 75 places, 83 transitions, 519 flow. Second operand 8 states and 150 transitions. [2024-06-21 21:01:21,507 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 122 transitions, 921 flow [2024-06-21 21:01:21,520 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 122 transitions, 893 flow, removed 7 selfloop flow, removed 3 redundant places. [2024-06-21 21:01:21,522 INFO L231 Difference]: Finished difference. Result has 82 places, 98 transitions, 695 flow [2024-06-21 21:01:21,523 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=491, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=695, PETRI_PLACES=82, PETRI_TRANSITIONS=98} [2024-06-21 21:01:21,523 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 39 predicate places. [2024-06-21 21:01:21,524 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 98 transitions, 695 flow [2024-06-21 21:01:21,524 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:01:21,525 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:01:21,525 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:01:21,525 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-21 21:01:21,525 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)] === [2024-06-21 21:01:21,525 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:01:21,526 INFO L85 PathProgramCache]: Analyzing trace with hash 1552291704, now seen corresponding path program 2 times [2024-06-21 21:01:21,526 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:01:21,526 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1477575935] [2024-06-21 21:01:21,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:01:21,526 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:01:21,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:01:22,613 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:01:22,613 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:01:22,614 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1477575935] [2024-06-21 21:01:22,614 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1477575935] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:01:22,614 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:01:22,614 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:01:22,614 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1807111051] [2024-06-21 21:01:22,614 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:01:22,614 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:01:22,614 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:01:22,615 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:01:22,615 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:01:22,707 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 21:01:22,707 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 98 transitions, 695 flow. Second operand has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:01:22,707 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:01:22,707 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 21:01:22,707 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:01:23,247 INFO L124 PetriNetUnfolderBase]: 1689/2639 cut-off events. [2024-06-21 21:01:23,247 INFO L125 PetriNetUnfolderBase]: For 22720/22722 co-relation queries the response was YES. [2024-06-21 21:01:23,255 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12146 conditions, 2639 events. 1689/2639 cut-off events. For 22720/22722 co-relation queries the response was YES. Maximal size of possible extension queue 105. Compared 12923 event pairs, 568 based on Foata normal form. 4/2640 useless extension candidates. Maximal degree in co-relation 12112. Up to 2382 conditions per place. [2024-06-21 21:01:23,266 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 84 selfloop transitions, 43 changer transitions 0/132 dead transitions. [2024-06-21 21:01:23,267 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 132 transitions, 1095 flow [2024-06-21 21:01:23,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:01:23,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:01:23,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 150 transitions. [2024-06-21 21:01:23,268 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44642857142857145 [2024-06-21 21:01:23,268 INFO L175 Difference]: Start difference. First operand has 82 places, 98 transitions, 695 flow. Second operand 8 states and 150 transitions. [2024-06-21 21:01:23,269 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 132 transitions, 1095 flow [2024-06-21 21:01:23,284 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 132 transitions, 1024 flow, removed 20 selfloop flow, removed 4 redundant places. [2024-06-21 21:01:23,286 INFO L231 Difference]: Finished difference. Result has 87 places, 110 transitions, 824 flow [2024-06-21 21:01:23,287 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=632, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=98, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=824, PETRI_PLACES=87, PETRI_TRANSITIONS=110} [2024-06-21 21:01:23,288 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 44 predicate places. [2024-06-21 21:01:23,288 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 110 transitions, 824 flow [2024-06-21 21:01:23,288 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:01:23,288 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:01:23,288 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:01:23,288 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-21 21:01:23,289 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)] === [2024-06-21 21:01:23,289 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:01:23,289 INFO L85 PathProgramCache]: Analyzing trace with hash 652974598, now seen corresponding path program 3 times [2024-06-21 21:01:23,289 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:01:23,289 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [399533512] [2024-06-21 21:01:23,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:01:23,290 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:01:23,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:01:24,374 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:01:24,374 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:01:24,374 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [399533512] [2024-06-21 21:01:24,375 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [399533512] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:01:24,375 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:01:24,375 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:01:24,375 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1732049056] [2024-06-21 21:01:24,375 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:01:24,375 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:01:24,375 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:01:24,376 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:01:24,376 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:01:24,459 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 21:01:24,459 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 110 transitions, 824 flow. Second operand has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:01:24,460 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:01:24,460 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 21:01:24,460 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:01:24,931 INFO L124 PetriNetUnfolderBase]: 1700/2643 cut-off events. [2024-06-21 21:01:24,931 INFO L125 PetriNetUnfolderBase]: For 26225/26227 co-relation queries the response was YES. [2024-06-21 21:01:24,940 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12837 conditions, 2643 events. 1700/2643 cut-off events. For 26225/26227 co-relation queries the response was YES. Maximal size of possible extension queue 105. Compared 12912 event pairs, 568 based on Foata normal form. 4/2643 useless extension candidates. Maximal degree in co-relation 12801. Up to 2352 conditions per place. [2024-06-21 21:01:24,951 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 81 selfloop transitions, 54 changer transitions 0/140 dead transitions. [2024-06-21 21:01:24,951 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 140 transitions, 1294 flow [2024-06-21 21:01:24,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:01:24,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:01:24,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 153 transitions. [2024-06-21 21:01:24,953 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45535714285714285 [2024-06-21 21:01:24,953 INFO L175 Difference]: Start difference. First operand has 87 places, 110 transitions, 824 flow. Second operand 8 states and 153 transitions. [2024-06-21 21:01:24,953 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 140 transitions, 1294 flow [2024-06-21 21:01:24,974 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 140 transitions, 1245 flow, removed 17 selfloop flow, removed 2 redundant places. [2024-06-21 21:01:24,980 INFO L231 Difference]: Finished difference. Result has 93 places, 116 transitions, 977 flow [2024-06-21 21:01:24,981 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=775, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=110, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=977, PETRI_PLACES=93, PETRI_TRANSITIONS=116} [2024-06-21 21:01:24,982 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 50 predicate places. [2024-06-21 21:01:24,982 INFO L495 AbstractCegarLoop]: Abstraction has has 93 places, 116 transitions, 977 flow [2024-06-21 21:01:24,982 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:01:24,982 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:01:24,982 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:01:24,982 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-21 21:01:24,983 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:01:24,983 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:01:24,983 INFO L85 PathProgramCache]: Analyzing trace with hash 1544940054, now seen corresponding path program 4 times [2024-06-21 21:01:24,983 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:01:24,983 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2056332204] [2024-06-21 21:01:24,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:01:24,984 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:01:24,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:01:26,240 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:01:26,241 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:01:26,241 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2056332204] [2024-06-21 21:01:26,241 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2056332204] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:01:26,241 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:01:26,241 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:01:26,241 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1662671078] [2024-06-21 21:01:26,241 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:01:26,242 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:01:26,242 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:01:26,242 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:01:26,242 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:01:26,363 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 21:01:26,363 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 116 transitions, 977 flow. Second operand has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:01:26,363 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:01:26,363 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 21:01:26,363 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:01:26,849 INFO L124 PetriNetUnfolderBase]: 1695/2636 cut-off events. [2024-06-21 21:01:26,850 INFO L125 PetriNetUnfolderBase]: For 29107/29109 co-relation queries the response was YES. [2024-06-21 21:01:26,858 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13198 conditions, 2636 events. 1695/2636 cut-off events. For 29107/29109 co-relation queries the response was YES. Maximal size of possible extension queue 105. Compared 12873 event pairs, 568 based on Foata normal form. 4/2636 useless extension candidates. Maximal degree in co-relation 13160. Up to 2391 conditions per place. [2024-06-21 21:01:26,869 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 91 selfloop transitions, 42 changer transitions 0/138 dead transitions. [2024-06-21 21:01:26,869 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 138 transitions, 1309 flow [2024-06-21 21:01:26,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:01:26,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:01:26,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 151 transitions. [2024-06-21 21:01:26,871 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4494047619047619 [2024-06-21 21:01:26,871 INFO L175 Difference]: Start difference. First operand has 93 places, 116 transitions, 977 flow. Second operand 8 states and 151 transitions. [2024-06-21 21:01:26,871 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 138 transitions, 1309 flow [2024-06-21 21:01:26,903 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 138 transitions, 1210 flow, removed 26 selfloop flow, removed 4 redundant places. [2024-06-21 21:01:26,905 INFO L231 Difference]: Finished difference. Result has 97 places, 116 transitions, 970 flow [2024-06-21 21:01:26,905 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=878, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=116, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=970, PETRI_PLACES=97, PETRI_TRANSITIONS=116} [2024-06-21 21:01:26,907 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 54 predicate places. [2024-06-21 21:01:26,907 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 116 transitions, 970 flow [2024-06-21 21:01:26,907 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:01:26,907 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:01:26,907 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:01:26,908 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-21 21:01:26,908 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:01:26,908 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:01:26,908 INFO L85 PathProgramCache]: Analyzing trace with hash 582571835, now seen corresponding path program 1 times [2024-06-21 21:01:26,909 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:01:26,909 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1776555866] [2024-06-21 21:01:26,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:01:26,909 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:01:26,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:01:27,821 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:01:27,822 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:01:27,822 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1776555866] [2024-06-21 21:01:27,822 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1776555866] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:01:27,822 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:01:27,822 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 21:01:27,822 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2134898429] [2024-06-21 21:01:27,823 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:01:27,823 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 21:01:27,823 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:01:27,824 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 21:01:27,824 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2024-06-21 21:01:27,883 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 21:01:27,884 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 116 transitions, 970 flow. Second operand has 8 states, 8 states have (on average 11.625) internal successors, (93), 8 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:01:27,884 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:01:27,884 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 21:01:27,884 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:01:28,434 INFO L124 PetriNetUnfolderBase]: 1692/2651 cut-off events. [2024-06-21 21:01:28,434 INFO L125 PetriNetUnfolderBase]: For 31831/31831 co-relation queries the response was YES. [2024-06-21 21:01:28,442 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13461 conditions, 2651 events. 1692/2651 cut-off events. For 31831/31831 co-relation queries the response was YES. Maximal size of possible extension queue 106. Compared 13084 event pairs, 586 based on Foata normal form. 1/2650 useless extension candidates. Maximal degree in co-relation 13421. Up to 2503 conditions per place. [2024-06-21 21:01:28,455 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 110 selfloop transitions, 12 changer transitions 0/127 dead transitions. [2024-06-21 21:01:28,456 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 127 transitions, 1260 flow [2024-06-21 21:01:28,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 21:01:28,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 21:01:28,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 106 transitions. [2024-06-21 21:01:28,457 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42063492063492064 [2024-06-21 21:01:28,457 INFO L175 Difference]: Start difference. First operand has 97 places, 116 transitions, 970 flow. Second operand 6 states and 106 transitions. [2024-06-21 21:01:28,457 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 127 transitions, 1260 flow [2024-06-21 21:01:28,493 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 127 transitions, 1122 flow, removed 12 selfloop flow, removed 8 redundant places. [2024-06-21 21:01:28,495 INFO L231 Difference]: Finished difference. Result has 95 places, 119 transitions, 892 flow [2024-06-21 21:01:28,495 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=832, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=116, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=104, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=892, PETRI_PLACES=95, PETRI_TRANSITIONS=119} [2024-06-21 21:01:28,496 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 52 predicate places. [2024-06-21 21:01:28,496 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 119 transitions, 892 flow [2024-06-21 21:01:28,496 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.625) internal successors, (93), 8 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:01:28,496 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:01:28,496 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:01:28,496 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-21 21:01:28,497 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)] === [2024-06-21 21:01:28,497 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:01:28,497 INFO L85 PathProgramCache]: Analyzing trace with hash 1678272236, now seen corresponding path program 1 times [2024-06-21 21:01:28,497 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:01:28,497 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1473187860] [2024-06-21 21:01:28,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:01:28,498 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:01:28,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:01:29,671 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:01:29,672 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:01:29,672 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1473187860] [2024-06-21 21:01:29,672 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1473187860] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:01:29,672 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:01:29,672 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:01:29,672 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1416484414] [2024-06-21 21:01:29,673 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:01:29,673 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:01:29,673 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:01:29,673 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:01:29,674 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:01:29,796 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-21 21:01:29,797 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 119 transitions, 892 flow. Second operand has 9 states, 9 states have (on average 12.333333333333334) internal successors, (111), 9 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:01:29,797 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:01:29,797 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-21 21:01:29,797 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:01:30,433 INFO L124 PetriNetUnfolderBase]: 1711/2685 cut-off events. [2024-06-21 21:01:30,434 INFO L125 PetriNetUnfolderBase]: For 40648/40648 co-relation queries the response was YES. [2024-06-21 21:01:30,441 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14671 conditions, 2685 events. 1711/2685 cut-off events. For 40648/40648 co-relation queries the response was YES. Maximal size of possible extension queue 114. Compared 13711 event pairs, 389 based on Foata normal form. 4/2681 useless extension candidates. Maximal degree in co-relation 14632. Up to 2390 conditions per place. [2024-06-21 21:01:30,450 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 117 selfloop transitions, 23 changer transitions 0/150 dead transitions. [2024-06-21 21:01:30,450 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 150 transitions, 1298 flow [2024-06-21 21:01:30,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:01:30,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:01:30,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 160 transitions. [2024-06-21 21:01:30,452 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47619047619047616 [2024-06-21 21:01:30,452 INFO L175 Difference]: Start difference. First operand has 95 places, 119 transitions, 892 flow. Second operand 8 states and 160 transitions. [2024-06-21 21:01:30,453 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 150 transitions, 1298 flow [2024-06-21 21:01:30,482 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 150 transitions, 1260 flow, removed 9 selfloop flow, removed 4 redundant places. [2024-06-21 21:01:30,484 INFO L231 Difference]: Finished difference. Result has 99 places, 121 transitions, 951 flow [2024-06-21 21:01:30,484 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=854, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=119, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=96, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=951, PETRI_PLACES=99, PETRI_TRANSITIONS=121} [2024-06-21 21:01:30,485 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 56 predicate places. [2024-06-21 21:01:30,485 INFO L495 AbstractCegarLoop]: Abstraction has has 99 places, 121 transitions, 951 flow [2024-06-21 21:01:30,485 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.333333333333334) internal successors, (111), 9 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:01:30,485 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:01:30,485 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:01:30,485 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-21 21:01:30,486 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)] === [2024-06-21 21:01:30,486 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:01:30,486 INFO L85 PathProgramCache]: Analyzing trace with hash -561231118, now seen corresponding path program 2 times [2024-06-21 21:01:30,486 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:01:30,486 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [165069871] [2024-06-21 21:01:30,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:01:30,487 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:01:30,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:01:31,776 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:01:31,776 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:01:31,777 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [165069871] [2024-06-21 21:01:31,777 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [165069871] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:01:31,777 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:01:31,777 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:01:31,777 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [595736195] [2024-06-21 21:01:31,777 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:01:31,777 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:01:31,777 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:01:31,778 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:01:31,778 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:01:31,912 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-21 21:01:31,913 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 121 transitions, 951 flow. Second operand has 9 states, 9 states have (on average 12.333333333333334) internal successors, (111), 9 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:01:31,913 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:01:31,913 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-21 21:01:31,913 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:01:32,583 INFO L124 PetriNetUnfolderBase]: 1714/2710 cut-off events. [2024-06-21 21:01:32,583 INFO L125 PetriNetUnfolderBase]: For 46256/46256 co-relation queries the response was YES. [2024-06-21 21:01:32,590 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15280 conditions, 2710 events. 1714/2710 cut-off events. For 46256/46256 co-relation queries the response was YES. Maximal size of possible extension queue 113. Compared 13946 event pairs, 487 based on Foata normal form. 4/2712 useless extension candidates. Maximal degree in co-relation 15240. Up to 2429 conditions per place. [2024-06-21 21:01:32,600 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 117 selfloop transitions, 24 changer transitions 0/151 dead transitions. [2024-06-21 21:01:32,600 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 151 transitions, 1361 flow [2024-06-21 21:01:32,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:01:32,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:01:32,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 160 transitions. [2024-06-21 21:01:32,601 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47619047619047616 [2024-06-21 21:01:32,601 INFO L175 Difference]: Start difference. First operand has 99 places, 121 transitions, 951 flow. Second operand 8 states and 160 transitions. [2024-06-21 21:01:32,601 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 151 transitions, 1361 flow [2024-06-21 21:01:32,636 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 151 transitions, 1282 flow, removed 18 selfloop flow, removed 6 redundant places. [2024-06-21 21:01:32,638 INFO L231 Difference]: Finished difference. Result has 101 places, 123 transitions, 975 flow [2024-06-21 21:01:32,639 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=872, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=121, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=97, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=975, PETRI_PLACES=101, PETRI_TRANSITIONS=123} [2024-06-21 21:01:32,639 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 58 predicate places. [2024-06-21 21:01:32,639 INFO L495 AbstractCegarLoop]: Abstraction has has 101 places, 123 transitions, 975 flow [2024-06-21 21:01:32,640 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.333333333333334) internal successors, (111), 9 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:01:32,640 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:01:32,640 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:01:32,640 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-21 21:01:32,640 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)] === [2024-06-21 21:01:32,640 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:01:32,641 INFO L85 PathProgramCache]: Analyzing trace with hash -2071348302, now seen corresponding path program 3 times [2024-06-21 21:01:32,641 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:01:32,641 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1436541780] [2024-06-21 21:01:32,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:01:32,641 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:01:32,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:01:33,823 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:01:33,823 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:01:33,823 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1436541780] [2024-06-21 21:01:33,823 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1436541780] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:01:33,823 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:01:33,823 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:01:33,823 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [371755997] [2024-06-21 21:01:33,823 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:01:33,824 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:01:33,824 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:01:33,824 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:01:33,825 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:01:33,939 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-21 21:01:33,939 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 123 transitions, 975 flow. Second operand has 9 states, 9 states have (on average 12.333333333333334) internal successors, (111), 9 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:01:33,939 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:01:33,939 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-21 21:01:33,940 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:01:34,631 INFO L124 PetriNetUnfolderBase]: 1738/2754 cut-off events. [2024-06-21 21:01:34,631 INFO L125 PetriNetUnfolderBase]: For 53827/53827 co-relation queries the response was YES. [2024-06-21 21:01:34,637 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15932 conditions, 2754 events. 1738/2754 cut-off events. For 53827/53827 co-relation queries the response was YES. Maximal size of possible extension queue 113. Compared 14273 event pairs, 483 based on Foata normal form. 8/2760 useless extension candidates. Maximal degree in co-relation 15891. Up to 2403 conditions per place. [2024-06-21 21:01:34,645 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 102 selfloop transitions, 38 changer transitions 0/150 dead transitions. [2024-06-21 21:01:34,646 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 150 transitions, 1377 flow [2024-06-21 21:01:34,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:01:34,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:01:34,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 157 transitions. [2024-06-21 21:01:34,647 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46726190476190477 [2024-06-21 21:01:34,647 INFO L175 Difference]: Start difference. First operand has 101 places, 123 transitions, 975 flow. Second operand 8 states and 157 transitions. [2024-06-21 21:01:34,648 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 150 transitions, 1377 flow [2024-06-21 21:01:34,680 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 150 transitions, 1292 flow, removed 20 selfloop flow, removed 6 redundant places. [2024-06-21 21:01:34,683 INFO L231 Difference]: Finished difference. Result has 103 places, 125 transitions, 1027 flow [2024-06-21 21:01:34,683 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=890, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=123, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1027, PETRI_PLACES=103, PETRI_TRANSITIONS=125} [2024-06-21 21:01:34,683 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 60 predicate places. [2024-06-21 21:01:34,684 INFO L495 AbstractCegarLoop]: Abstraction has has 103 places, 125 transitions, 1027 flow [2024-06-21 21:01:34,684 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.333333333333334) internal successors, (111), 9 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:01:34,684 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:01:34,684 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:01:34,684 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-21 21:01:34,684 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)] === [2024-06-21 21:01:34,685 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:01:34,685 INFO L85 PathProgramCache]: Analyzing trace with hash 2108332784, now seen corresponding path program 1 times [2024-06-21 21:01:34,685 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:01:34,685 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1227295667] [2024-06-21 21:01:34,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:01:34,685 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:01:34,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:01:36,202 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:01:36,203 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:01:36,203 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1227295667] [2024-06-21 21:01:36,203 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1227295667] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:01:36,203 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:01:36,203 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:01:36,203 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1938620762] [2024-06-21 21:01:36,203 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:01:36,203 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:01:36,204 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:01:36,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:01:36,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:01:36,339 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 21:01:36,339 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 125 transitions, 1027 flow. Second operand has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:01:36,340 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:01:36,340 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 21:01:36,340 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:01:37,010 INFO L124 PetriNetUnfolderBase]: 1868/2904 cut-off events. [2024-06-21 21:01:37,011 INFO L125 PetriNetUnfolderBase]: For 57271/57271 co-relation queries the response was YES. [2024-06-21 21:01:37,017 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16532 conditions, 2904 events. 1868/2904 cut-off events. For 57271/57271 co-relation queries the response was YES. Maximal size of possible extension queue 111. Compared 14553 event pairs, 510 based on Foata normal form. 2/2904 useless extension candidates. Maximal degree in co-relation 16490. Up to 2678 conditions per place. [2024-06-21 21:01:37,024 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 128 selfloop transitions, 28 changer transitions 0/162 dead transitions. [2024-06-21 21:01:37,025 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 162 transitions, 1503 flow [2024-06-21 21:01:37,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:01:37,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:01:37,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 170 transitions. [2024-06-21 21:01:37,026 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4497354497354497 [2024-06-21 21:01:37,026 INFO L175 Difference]: Start difference. First operand has 103 places, 125 transitions, 1027 flow. Second operand 9 states and 170 transitions. [2024-06-21 21:01:37,026 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 162 transitions, 1503 flow [2024-06-21 21:01:37,069 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 162 transitions, 1379 flow, removed 28 selfloop flow, removed 6 redundant places. [2024-06-21 21:01:37,072 INFO L231 Difference]: Finished difference. Result has 107 places, 131 transitions, 1049 flow [2024-06-21 21:01:37,072 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=903, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=125, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=99, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1049, PETRI_PLACES=107, PETRI_TRANSITIONS=131} [2024-06-21 21:01:37,073 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 64 predicate places. [2024-06-21 21:01:37,073 INFO L495 AbstractCegarLoop]: Abstraction has has 107 places, 131 transitions, 1049 flow [2024-06-21 21:01:37,073 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:01:37,073 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:01:37,073 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:01:37,073 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-21 21:01:37,074 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)] === [2024-06-21 21:01:37,074 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:01:37,074 INFO L85 PathProgramCache]: Analyzing trace with hash -2071163852, now seen corresponding path program 2 times [2024-06-21 21:01:37,074 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:01:37,074 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2051222802] [2024-06-21 21:01:37,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:01:37,075 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:01:37,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:01:38,357 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:01:38,357 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:01:38,357 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2051222802] [2024-06-21 21:01:38,357 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2051222802] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:01:38,357 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:01:38,357 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:01:38,358 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [771683550] [2024-06-21 21:01:38,358 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:01:38,358 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:01:38,358 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:01:38,359 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:01:38,359 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:01:38,485 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 21:01:38,486 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 131 transitions, 1049 flow. Second operand has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:01:38,486 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:01:38,486 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 21:01:38,486 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:01:39,128 INFO L124 PetriNetUnfolderBase]: 1895/2948 cut-off events. [2024-06-21 21:01:39,129 INFO L125 PetriNetUnfolderBase]: For 63167/63167 co-relation queries the response was YES. [2024-06-21 21:01:39,137 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17312 conditions, 2948 events. 1895/2948 cut-off events. For 63167/63167 co-relation queries the response was YES. Maximal size of possible extension queue 111. Compared 14785 event pairs, 510 based on Foata normal form. 2/2948 useless extension candidates. Maximal degree in co-relation 17269. Up to 2567 conditions per place. [2024-06-21 21:01:39,147 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 110 selfloop transitions, 59 changer transitions 0/175 dead transitions. [2024-06-21 21:01:39,147 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 175 transitions, 1733 flow [2024-06-21 21:01:39,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:01:39,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:01:39,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 173 transitions. [2024-06-21 21:01:39,149 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4576719576719577 [2024-06-21 21:01:39,149 INFO L175 Difference]: Start difference. First operand has 107 places, 131 transitions, 1049 flow. Second operand 9 states and 173 transitions. [2024-06-21 21:01:39,149 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 115 places, 175 transitions, 1733 flow [2024-06-21 21:01:39,182 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 175 transitions, 1608 flow, removed 27 selfloop flow, removed 7 redundant places. [2024-06-21 21:01:39,184 INFO L231 Difference]: Finished difference. Result has 110 places, 144 transitions, 1254 flow [2024-06-21 21:01:39,185 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=924, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=131, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1254, PETRI_PLACES=110, PETRI_TRANSITIONS=144} [2024-06-21 21:01:39,185 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 67 predicate places. [2024-06-21 21:01:39,185 INFO L495 AbstractCegarLoop]: Abstraction has has 110 places, 144 transitions, 1254 flow [2024-06-21 21:01:39,185 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:01:39,185 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:01:39,185 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:01:39,185 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-21 21:01:39,186 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)] === [2024-06-21 21:01:39,186 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:01:39,186 INFO L85 PathProgramCache]: Analyzing trace with hash -2071170362, now seen corresponding path program 3 times [2024-06-21 21:01:39,186 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:01:39,186 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [15431335] [2024-06-21 21:01:39,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:01:39,186 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:01:39,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:01:40,712 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:01:40,713 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:01:40,713 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [15431335] [2024-06-21 21:01:40,713 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [15431335] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:01:40,713 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:01:40,713 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:01:40,713 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1495125564] [2024-06-21 21:01:40,714 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:01:40,714 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:01:40,714 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:01:40,715 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:01:40,715 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:01:40,858 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 21:01:40,858 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 144 transitions, 1254 flow. Second operand has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:01:40,858 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:01:40,858 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 21:01:40,858 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:01:41,532 INFO L124 PetriNetUnfolderBase]: 1935/3006 cut-off events. [2024-06-21 21:01:41,532 INFO L125 PetriNetUnfolderBase]: For 70621/70621 co-relation queries the response was YES. [2024-06-21 21:01:41,540 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18241 conditions, 3006 events. 1935/3006 cut-off events. For 70621/70621 co-relation queries the response was YES. Maximal size of possible extension queue 111. Compared 15140 event pairs, 505 based on Foata normal form. 2/3006 useless extension candidates. Maximal degree in co-relation 18197. Up to 2652 conditions per place. [2024-06-21 21:01:41,550 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 119 selfloop transitions, 60 changer transitions 0/185 dead transitions. [2024-06-21 21:01:41,550 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 185 transitions, 1855 flow [2024-06-21 21:01:41,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:01:41,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:01:41,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 170 transitions. [2024-06-21 21:01:41,551 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4497354497354497 [2024-06-21 21:01:41,551 INFO L175 Difference]: Start difference. First operand has 110 places, 144 transitions, 1254 flow. Second operand 9 states and 170 transitions. [2024-06-21 21:01:41,551 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 185 transitions, 1855 flow [2024-06-21 21:01:41,597 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 185 transitions, 1779 flow, removed 29 selfloop flow, removed 3 redundant places. [2024-06-21 21:01:41,600 INFO L231 Difference]: Finished difference. Result has 116 places, 156 transitions, 1469 flow [2024-06-21 21:01:41,600 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1178, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=144, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1469, PETRI_PLACES=116, PETRI_TRANSITIONS=156} [2024-06-21 21:01:41,600 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 73 predicate places. [2024-06-21 21:01:41,601 INFO L495 AbstractCegarLoop]: Abstraction has has 116 places, 156 transitions, 1469 flow [2024-06-21 21:01:41,601 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:01:41,601 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:01:41,601 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:01:41,601 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-21 21:01:41,601 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)] === [2024-06-21 21:01:41,602 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:01:41,602 INFO L85 PathProgramCache]: Analyzing trace with hash -2071163604, now seen corresponding path program 1 times [2024-06-21 21:01:41,602 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:01:41,602 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [142768870] [2024-06-21 21:01:41,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:01:41,602 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:01:41,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:01:42,702 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:01:42,702 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:01:42,702 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [142768870] [2024-06-21 21:01:42,702 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [142768870] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:01:42,703 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:01:42,703 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:01:42,703 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1698977718] [2024-06-21 21:01:42,703 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:01:42,703 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:01:42,703 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:01:42,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:01:42,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:01:42,846 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 21:01:42,847 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 156 transitions, 1469 flow. Second operand has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:01:42,847 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:01:42,847 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 21:01:42,847 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:01:43,387 INFO L124 PetriNetUnfolderBase]: 1952/3033 cut-off events. [2024-06-21 21:01:43,387 INFO L125 PetriNetUnfolderBase]: For 76614/76614 co-relation queries the response was YES. [2024-06-21 21:01:43,396 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18660 conditions, 3033 events. 1952/3033 cut-off events. For 76614/76614 co-relation queries the response was YES. Maximal size of possible extension queue 114. Compared 15327 event pairs, 506 based on Foata normal form. 4/3035 useless extension candidates. Maximal degree in co-relation 18614. Up to 2772 conditions per place. [2024-06-21 21:01:43,407 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 148 selfloop transitions, 33 changer transitions 0/187 dead transitions. [2024-06-21 21:01:43,407 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 124 places, 187 transitions, 1961 flow [2024-06-21 21:01:43,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:01:43,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:01:43,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 167 transitions. [2024-06-21 21:01:43,408 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4417989417989418 [2024-06-21 21:01:43,408 INFO L175 Difference]: Start difference. First operand has 116 places, 156 transitions, 1469 flow. Second operand 9 states and 167 transitions. [2024-06-21 21:01:43,408 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 124 places, 187 transitions, 1961 flow [2024-06-21 21:01:43,459 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 118 places, 187 transitions, 1793 flow, removed 28 selfloop flow, removed 6 redundant places. [2024-06-21 21:01:43,462 INFO L231 Difference]: Finished difference. Result has 119 places, 158 transitions, 1422 flow [2024-06-21 21:01:43,462 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1301, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=156, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=123, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1422, PETRI_PLACES=119, PETRI_TRANSITIONS=158} [2024-06-21 21:01:43,462 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 76 predicate places. [2024-06-21 21:01:43,462 INFO L495 AbstractCegarLoop]: Abstraction has has 119 places, 158 transitions, 1422 flow [2024-06-21 21:01:43,463 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:01:43,463 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:01:43,463 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:01:43,463 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-21 21:01:43,463 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)] === [2024-06-21 21:01:43,464 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:01:43,464 INFO L85 PathProgramCache]: Analyzing trace with hash -2071343342, now seen corresponding path program 4 times [2024-06-21 21:01:43,464 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:01:43,464 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [285176841] [2024-06-21 21:01:43,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:01:43,464 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:01:43,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:01:45,024 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:01:45,025 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:01:45,025 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [285176841] [2024-06-21 21:01:45,025 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [285176841] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:01:45,025 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:01:45,025 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:01:45,025 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [753647516] [2024-06-21 21:01:45,025 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:01:45,025 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:01:45,026 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:01:45,026 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:01:45,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:01:45,186 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 21:01:45,186 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 158 transitions, 1422 flow. Second operand has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:01:45,186 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:01:45,187 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 21:01:45,187 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:01:45,899 INFO L124 PetriNetUnfolderBase]: 1947/3026 cut-off events. [2024-06-21 21:01:45,899 INFO L125 PetriNetUnfolderBase]: For 80865/80865 co-relation queries the response was YES. [2024-06-21 21:01:45,908 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18821 conditions, 3026 events. 1947/3026 cut-off events. For 80865/80865 co-relation queries the response was YES. Maximal size of possible extension queue 113. Compared 15293 event pairs, 508 based on Foata normal form. 2/3026 useless extension candidates. Maximal degree in co-relation 18774. Up to 2672 conditions per place. [2024-06-21 21:01:45,919 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 122 selfloop transitions, 59 changer transitions 0/187 dead transitions. [2024-06-21 21:01:45,919 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 127 places, 187 transitions, 1872 flow [2024-06-21 21:01:45,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:01:45,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:01:45,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 171 transitions. [2024-06-21 21:01:45,920 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4523809523809524 [2024-06-21 21:01:45,920 INFO L175 Difference]: Start difference. First operand has 119 places, 158 transitions, 1422 flow. Second operand 9 states and 171 transitions. [2024-06-21 21:01:45,920 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 127 places, 187 transitions, 1872 flow [2024-06-21 21:01:45,978 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 187 transitions, 1727 flow, removed 41 selfloop flow, removed 7 redundant places. [2024-06-21 21:01:45,980 INFO L231 Difference]: Finished difference. Result has 121 places, 158 transitions, 1405 flow [2024-06-21 21:01:45,980 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1277, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=158, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=99, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1405, PETRI_PLACES=121, PETRI_TRANSITIONS=158} [2024-06-21 21:01:45,981 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 78 predicate places. [2024-06-21 21:01:45,981 INFO L495 AbstractCegarLoop]: Abstraction has has 121 places, 158 transitions, 1405 flow [2024-06-21 21:01:45,981 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:01:45,981 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:01:45,981 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:01:45,981 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-21 21:01:45,982 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)] === [2024-06-21 21:01:45,982 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:01:45,982 INFO L85 PathProgramCache]: Analyzing trace with hash 868417852, now seen corresponding path program 1 times [2024-06-21 21:01:45,982 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:01:45,982 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1837638241] [2024-06-21 21:01:45,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:01:45,983 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:01:45,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:01:46,811 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:01:46,812 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:01:46,812 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1837638241] [2024-06-21 21:01:46,812 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1837638241] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:01:46,812 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:01:46,812 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 21:01:46,812 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [513737172] [2024-06-21 21:01:46,812 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:01:46,812 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 21:01:46,813 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:01:46,813 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 21:01:46,813 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2024-06-21 21:01:46,872 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 21:01:46,872 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 121 places, 158 transitions, 1405 flow. Second operand has 8 states, 8 states have (on average 11.625) internal successors, (93), 8 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:01:46,872 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:01:46,872 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 21:01:46,872 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:01:47,495 INFO L124 PetriNetUnfolderBase]: 1985/3070 cut-off events. [2024-06-21 21:01:47,495 INFO L125 PetriNetUnfolderBase]: For 85706/85706 co-relation queries the response was YES. [2024-06-21 21:01:47,505 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19252 conditions, 3070 events. 1985/3070 cut-off events. For 85706/85706 co-relation queries the response was YES. Maximal size of possible extension queue 114. Compared 15323 event pairs, 515 based on Foata normal form. 2/3070 useless extension candidates. Maximal degree in co-relation 19204. Up to 2840 conditions per place. [2024-06-21 21:01:47,515 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 152 selfloop transitions, 23 changer transitions 0/181 dead transitions. [2024-06-21 21:01:47,515 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 181 transitions, 1927 flow [2024-06-21 21:01:47,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 21:01:47,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 21:01:47,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 117 transitions. [2024-06-21 21:01:47,516 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4642857142857143 [2024-06-21 21:01:47,516 INFO L175 Difference]: Start difference. First operand has 121 places, 158 transitions, 1405 flow. Second operand 6 states and 117 transitions. [2024-06-21 21:01:47,516 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 181 transitions, 1927 flow [2024-06-21 21:01:47,564 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 181 transitions, 1745 flow, removed 12 selfloop flow, removed 9 redundant places. [2024-06-21 21:01:47,566 INFO L231 Difference]: Finished difference. Result has 118 places, 164 transitions, 1348 flow [2024-06-21 21:01:47,566 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1223, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=158, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=138, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1348, PETRI_PLACES=118, PETRI_TRANSITIONS=164} [2024-06-21 21:01:47,567 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 75 predicate places. [2024-06-21 21:01:47,567 INFO L495 AbstractCegarLoop]: Abstraction has has 118 places, 164 transitions, 1348 flow [2024-06-21 21:01:47,567 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.625) internal successors, (93), 8 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:01:47,567 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:01:47,567 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:01:47,568 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-21 21:01:47,568 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)] === [2024-06-21 21:01:47,568 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:01:47,568 INFO L85 PathProgramCache]: Analyzing trace with hash 1962059500, now seen corresponding path program 4 times [2024-06-21 21:01:47,568 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:01:47,568 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1287323651] [2024-06-21 21:01:47,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:01:47,568 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:01:47,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:01:48,594 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:01:48,595 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:01:48,595 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1287323651] [2024-06-21 21:01:48,595 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1287323651] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:01:48,595 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:01:48,595 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:01:48,595 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [425648952] [2024-06-21 21:01:48,595 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:01:48,595 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:01:48,595 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:01:48,596 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:01:48,596 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:01:48,696 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-21 21:01:48,696 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 164 transitions, 1348 flow. Second operand has 9 states, 9 states have (on average 12.333333333333334) internal successors, (111), 9 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:01:48,696 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:01:48,697 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-21 21:01:48,697 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:01:49,311 INFO L124 PetriNetUnfolderBase]: 1837/2906 cut-off events. [2024-06-21 21:01:49,311 INFO L125 PetriNetUnfolderBase]: For 91782/91784 co-relation queries the response was YES. [2024-06-21 21:01:49,321 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18851 conditions, 2906 events. 1837/2906 cut-off events. For 91782/91784 co-relation queries the response was YES. Maximal size of possible extension queue 113. Compared 15061 event pairs, 482 based on Foata normal form. 10/2906 useless extension candidates. Maximal degree in co-relation 18803. Up to 2500 conditions per place. [2024-06-21 21:01:49,331 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 112 selfloop transitions, 65 changer transitions 0/189 dead transitions. [2024-06-21 21:01:49,331 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 125 places, 189 transitions, 1828 flow [2024-06-21 21:01:49,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:01:49,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:01:49,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 157 transitions. [2024-06-21 21:01:49,332 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46726190476190477 [2024-06-21 21:01:49,332 INFO L175 Difference]: Start difference. First operand has 118 places, 164 transitions, 1348 flow. Second operand 8 states and 157 transitions. [2024-06-21 21:01:49,332 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 125 places, 189 transitions, 1828 flow [2024-06-21 21:01:49,394 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 189 transitions, 1793 flow, removed 13 selfloop flow, removed 2 redundant places. [2024-06-21 21:01:49,396 INFO L231 Difference]: Finished difference. Result has 124 places, 166 transitions, 1512 flow [2024-06-21 21:01:49,396 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1313, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=164, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=99, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1512, PETRI_PLACES=124, PETRI_TRANSITIONS=166} [2024-06-21 21:01:49,396 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 81 predicate places. [2024-06-21 21:01:49,396 INFO L495 AbstractCegarLoop]: Abstraction has has 124 places, 166 transitions, 1512 flow [2024-06-21 21:01:49,397 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.333333333333334) internal successors, (111), 9 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:01:49,397 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:01:49,397 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:01:49,397 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-21 21:01:49,397 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)] === [2024-06-21 21:01:49,397 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:01:49,397 INFO L85 PathProgramCache]: Analyzing trace with hash 1968500060, now seen corresponding path program 5 times [2024-06-21 21:01:49,397 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:01:49,397 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1367542426] [2024-06-21 21:01:49,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:01:49,397 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:01:49,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:01:50,603 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:01:50,604 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:01:50,604 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1367542426] [2024-06-21 21:01:50,604 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1367542426] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:01:50,604 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:01:50,604 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:01:50,604 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [471389081] [2024-06-21 21:01:50,604 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:01:50,604 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:01:50,604 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:01:50,605 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:01:50,605 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:01:50,742 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 21:01:50,742 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 124 places, 166 transitions, 1512 flow. Second operand has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:01:50,742 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:01:50,742 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 21:01:50,742 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:01:51,375 INFO L124 PetriNetUnfolderBase]: 2007/3111 cut-off events. [2024-06-21 21:01:51,375 INFO L125 PetriNetUnfolderBase]: For 99099/99099 co-relation queries the response was YES. [2024-06-21 21:01:51,385 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20218 conditions, 3111 events. 2007/3111 cut-off events. For 99099/99099 co-relation queries the response was YES. Maximal size of possible extension queue 119. Compared 15648 event pairs, 521 based on Foata normal form. 2/3109 useless extension candidates. Maximal degree in co-relation 20168. Up to 2656 conditions per place. [2024-06-21 21:01:51,396 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 118 selfloop transitions, 83 changer transitions 0/207 dead transitions. [2024-06-21 21:01:51,396 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 132 places, 207 transitions, 2290 flow [2024-06-21 21:01:51,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:01:51,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:01:51,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 174 transitions. [2024-06-21 21:01:51,397 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4603174603174603 [2024-06-21 21:01:51,397 INFO L175 Difference]: Start difference. First operand has 124 places, 166 transitions, 1512 flow. Second operand 9 states and 174 transitions. [2024-06-21 21:01:51,397 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 132 places, 207 transitions, 2290 flow [2024-06-21 21:01:51,466 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 126 places, 207 transitions, 2087 flow, removed 32 selfloop flow, removed 6 redundant places. [2024-06-21 21:01:51,468 INFO L231 Difference]: Finished difference. Result has 128 places, 178 transitions, 1709 flow [2024-06-21 21:01:51,468 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1323, PETRI_DIFFERENCE_MINUEND_PLACES=118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=166, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1709, PETRI_PLACES=128, PETRI_TRANSITIONS=178} [2024-06-21 21:01:51,469 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 85 predicate places. [2024-06-21 21:01:51,469 INFO L495 AbstractCegarLoop]: Abstraction has has 128 places, 178 transitions, 1709 flow [2024-06-21 21:01:51,469 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:01:51,469 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:01:51,469 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:01:51,469 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-21 21:01:51,469 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)] === [2024-06-21 21:01:51,470 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:01:51,470 INFO L85 PathProgramCache]: Analyzing trace with hash 1076318844, now seen corresponding path program 6 times [2024-06-21 21:01:51,470 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:01:51,470 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1280740770] [2024-06-21 21:01:51,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:01:51,470 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:01:51,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:01:52,809 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:01:52,809 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:01:52,809 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1280740770] [2024-06-21 21:01:52,809 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1280740770] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:01:52,809 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:01:52,809 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:01:52,810 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [596210377] [2024-06-21 21:01:52,810 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:01:52,810 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:01:52,810 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:01:52,811 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:01:52,811 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:01:52,990 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 21:01:52,990 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 128 places, 178 transitions, 1709 flow. Second operand has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:01:52,990 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:01:52,990 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 21:01:52,990 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:01:53,619 INFO L124 PetriNetUnfolderBase]: 2002/3106 cut-off events. [2024-06-21 21:01:53,619 INFO L125 PetriNetUnfolderBase]: For 105043/105045 co-relation queries the response was YES. [2024-06-21 21:01:53,629 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20687 conditions, 3106 events. 2002/3106 cut-off events. For 105043/105045 co-relation queries the response was YES. Maximal size of possible extension queue 118. Compared 15644 event pairs, 515 based on Foata normal form. 4/3106 useless extension candidates. Maximal degree in co-relation 20635. Up to 2711 conditions per place. [2024-06-21 21:01:53,640 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 125 selfloop transitions, 73 changer transitions 0/204 dead transitions. [2024-06-21 21:01:53,640 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 136 places, 204 transitions, 2183 flow [2024-06-21 21:01:53,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:01:53,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:01:53,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 169 transitions. [2024-06-21 21:01:53,642 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4470899470899471 [2024-06-21 21:01:53,642 INFO L175 Difference]: Start difference. First operand has 128 places, 178 transitions, 1709 flow. Second operand 9 states and 169 transitions. [2024-06-21 21:01:53,642 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 136 places, 204 transitions, 2183 flow [2024-06-21 21:01:53,728 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 133 places, 204 transitions, 2002 flow, removed 67 selfloop flow, removed 3 redundant places. [2024-06-21 21:01:53,730 INFO L231 Difference]: Finished difference. Result has 134 places, 178 transitions, 1682 flow [2024-06-21 21:01:53,730 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1528, PETRI_DIFFERENCE_MINUEND_PLACES=125, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=178, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=73, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=105, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1682, PETRI_PLACES=134, PETRI_TRANSITIONS=178} [2024-06-21 21:01:53,730 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 91 predicate places. [2024-06-21 21:01:53,731 INFO L495 AbstractCegarLoop]: Abstraction has has 134 places, 178 transitions, 1682 flow [2024-06-21 21:01:53,731 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:01:53,731 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:01:53,731 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:01:53,731 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-21 21:01:53,731 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)] === [2024-06-21 21:01:53,732 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:01:53,732 INFO L85 PathProgramCache]: Analyzing trace with hash 1070069244, now seen corresponding path program 7 times [2024-06-21 21:01:53,732 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:01:53,732 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [492286028] [2024-06-21 21:01:53,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:01:53,732 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:01:53,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:01:54,864 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:01:54,864 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:01:54,864 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [492286028] [2024-06-21 21:01:54,865 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [492286028] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:01:54,865 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:01:54,865 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:01:54,865 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1221612661] [2024-06-21 21:01:54,865 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:01:54,865 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:01:54,865 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:01:54,866 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:01:54,866 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:01:55,003 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 21:01:55,004 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 134 places, 178 transitions, 1682 flow. Second operand has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:01:55,004 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:01:55,004 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 21:01:55,004 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:01:55,638 INFO L124 PetriNetUnfolderBase]: 2029/3143 cut-off events. [2024-06-21 21:01:55,639 INFO L125 PetriNetUnfolderBase]: For 111632/111632 co-relation queries the response was YES. [2024-06-21 21:01:55,650 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20903 conditions, 3143 events. 2029/3143 cut-off events. For 111632/111632 co-relation queries the response was YES. Maximal size of possible extension queue 122. Compared 15823 event pairs, 521 based on Foata normal form. 2/3141 useless extension candidates. Maximal degree in co-relation 20850. Up to 2688 conditions per place. [2024-06-21 21:01:55,661 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 127 selfloop transitions, 80 changer transitions 0/213 dead transitions. [2024-06-21 21:01:55,661 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 142 places, 213 transitions, 2448 flow [2024-06-21 21:01:55,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:01:55,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:01:55,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 175 transitions. [2024-06-21 21:01:55,662 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46296296296296297 [2024-06-21 21:01:55,662 INFO L175 Difference]: Start difference. First operand has 134 places, 178 transitions, 1682 flow. Second operand 9 states and 175 transitions. [2024-06-21 21:01:55,662 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 142 places, 213 transitions, 2448 flow [2024-06-21 21:01:55,743 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 134 places, 213 transitions, 2280 flow, removed 4 selfloop flow, removed 8 redundant places. [2024-06-21 21:01:55,745 INFO L231 Difference]: Finished difference. Result has 135 places, 184 transitions, 1848 flow [2024-06-21 21:01:55,745 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1514, PETRI_DIFFERENCE_MINUEND_PLACES=126, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=178, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=77, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=101, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1848, PETRI_PLACES=135, PETRI_TRANSITIONS=184} [2024-06-21 21:01:55,746 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 92 predicate places. [2024-06-21 21:01:55,746 INFO L495 AbstractCegarLoop]: Abstraction has has 135 places, 184 transitions, 1848 flow [2024-06-21 21:01:55,746 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:01:55,746 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:01:55,747 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:01:55,747 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-21 21:01:55,747 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)] === [2024-06-21 21:01:55,747 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:01:55,747 INFO L85 PathProgramCache]: Analyzing trace with hash -1239289276, now seen corresponding path program 8 times [2024-06-21 21:01:55,747 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:01:55,748 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1082027352] [2024-06-21 21:01:55,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:01:55,748 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:01:55,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:01:56,976 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:01:56,976 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:01:56,976 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1082027352] [2024-06-21 21:01:56,976 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1082027352] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:01:56,976 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:01:56,976 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:01:56,976 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [180802899] [2024-06-21 21:01:56,977 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:01:56,977 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:01:56,977 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:01:56,977 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:01:56,977 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:01:57,120 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 21:01:57,120 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 184 transitions, 1848 flow. Second operand has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:01:57,120 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:01:57,120 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 21:01:57,120 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:01:57,856 INFO L124 PetriNetUnfolderBase]: 2051/3182 cut-off events. [2024-06-21 21:01:57,856 INFO L125 PetriNetUnfolderBase]: For 121159/121161 co-relation queries the response was YES. [2024-06-21 21:01:57,865 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21663 conditions, 3182 events. 2051/3182 cut-off events. For 121159/121161 co-relation queries the response was YES. Maximal size of possible extension queue 125. Compared 16083 event pairs, 520 based on Foata normal form. 4/3182 useless extension candidates. Maximal degree in co-relation 21609. Up to 2778 conditions per place. [2024-06-21 21:01:57,875 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 135 selfloop transitions, 75 changer transitions 0/216 dead transitions. [2024-06-21 21:01:57,875 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 143 places, 216 transitions, 2458 flow [2024-06-21 21:01:57,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:01:57,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:01:57,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 170 transitions. [2024-06-21 21:01:57,877 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4497354497354497 [2024-06-21 21:01:57,877 INFO L175 Difference]: Start difference. First operand has 135 places, 184 transitions, 1848 flow. Second operand 9 states and 170 transitions. [2024-06-21 21:01:57,877 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 143 places, 216 transitions, 2458 flow [2024-06-21 21:01:57,952 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 138 places, 216 transitions, 2234 flow, removed 52 selfloop flow, removed 5 redundant places. [2024-06-21 21:01:57,954 INFO L231 Difference]: Finished difference. Result has 139 places, 190 transitions, 1900 flow [2024-06-21 21:01:57,955 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1641, PETRI_DIFFERENCE_MINUEND_PLACES=130, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=184, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=112, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1900, PETRI_PLACES=139, PETRI_TRANSITIONS=190} [2024-06-21 21:01:57,955 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 96 predicate places. [2024-06-21 21:01:57,955 INFO L495 AbstractCegarLoop]: Abstraction has has 139 places, 190 transitions, 1900 flow [2024-06-21 21:01:57,955 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:01:57,956 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:01:57,956 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:01:57,956 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-21 21:01:57,956 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)] === [2024-06-21 21:01:57,956 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:01:57,957 INFO L85 PathProgramCache]: Analyzing trace with hash -1002637508, now seen corresponding path program 2 times [2024-06-21 21:01:57,957 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:01:57,957 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [319144317] [2024-06-21 21:01:57,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:01:57,957 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:01:57,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:01:59,042 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:01:59,043 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:01:59,043 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [319144317] [2024-06-21 21:01:59,043 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [319144317] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:01:59,043 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:01:59,043 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:01:59,043 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [390900913] [2024-06-21 21:01:59,043 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:01:59,043 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:01:59,044 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:01:59,044 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:01:59,044 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:01:59,222 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 21:01:59,223 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 139 places, 190 transitions, 1900 flow. Second operand has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:01:59,223 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:01:59,223 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 21:01:59,223 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:01:59,790 INFO L124 PetriNetUnfolderBase]: 2068/3209 cut-off events. [2024-06-21 21:01:59,790 INFO L125 PetriNetUnfolderBase]: For 128400/128402 co-relation queries the response was YES. [2024-06-21 21:01:59,801 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22030 conditions, 3209 events. 2068/3209 cut-off events. For 128400/128402 co-relation queries the response was YES. Maximal size of possible extension queue 127. Compared 16268 event pairs, 477 based on Foata normal form. 6/3211 useless extension candidates. Maximal degree in co-relation 21975. Up to 2773 conditions per place. [2024-06-21 21:01:59,812 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 157 selfloop transitions, 61 changer transitions 0/224 dead transitions. [2024-06-21 21:01:59,812 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 147 places, 224 transitions, 2640 flow [2024-06-21 21:01:59,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:01:59,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:01:59,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 171 transitions. [2024-06-21 21:01:59,814 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4523809523809524 [2024-06-21 21:01:59,814 INFO L175 Difference]: Start difference. First operand has 139 places, 190 transitions, 1900 flow. Second operand 9 states and 171 transitions. [2024-06-21 21:01:59,814 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 147 places, 224 transitions, 2640 flow [2024-06-21 21:01:59,928 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 140 places, 224 transitions, 2420 flow, removed 31 selfloop flow, removed 7 redundant places. [2024-06-21 21:01:59,931 INFO L231 Difference]: Finished difference. Result has 141 places, 194 transitions, 1917 flow [2024-06-21 21:01:59,931 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1680, PETRI_DIFFERENCE_MINUEND_PLACES=132, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=190, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=131, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1917, PETRI_PLACES=141, PETRI_TRANSITIONS=194} [2024-06-21 21:01:59,931 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 98 predicate places. [2024-06-21 21:01:59,931 INFO L495 AbstractCegarLoop]: Abstraction has has 141 places, 194 transitions, 1917 flow [2024-06-21 21:01:59,931 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:01:59,931 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:01:59,932 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:01:59,932 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-21 21:01:59,932 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)] === [2024-06-21 21:01:59,932 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:01:59,932 INFO L85 PathProgramCache]: Analyzing trace with hash -1239116296, now seen corresponding path program 9 times [2024-06-21 21:01:59,932 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:01:59,932 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1541777783] [2024-06-21 21:01:59,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:01:59,932 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:01:59,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:02:01,090 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:02:01,090 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:02:01,090 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1541777783] [2024-06-21 21:02:01,090 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1541777783] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:02:01,090 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:02:01,090 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:02:01,090 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2114267248] [2024-06-21 21:02:01,091 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:02:01,091 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:02:01,091 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:02:01,091 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:02:01,092 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:02:01,192 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 21:02:01,192 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 141 places, 194 transitions, 1917 flow. Second operand has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:02:01,192 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:02:01,192 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 21:02:01,193 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:02:01,832 INFO L124 PetriNetUnfolderBase]: 2063/3202 cut-off events. [2024-06-21 21:02:01,832 INFO L125 PetriNetUnfolderBase]: For 133599/133601 co-relation queries the response was YES. [2024-06-21 21:02:01,842 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22169 conditions, 3202 events. 2063/3202 cut-off events. For 133599/133601 co-relation queries the response was YES. Maximal size of possible extension queue 126. Compared 16185 event pairs, 520 based on Foata normal form. 4/3202 useless extension candidates. Maximal degree in co-relation 22114. Up to 2798 conditions per place. [2024-06-21 21:02:01,852 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 140 selfloop transitions, 74 changer transitions 0/220 dead transitions. [2024-06-21 21:02:01,853 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 149 places, 220 transitions, 2423 flow [2024-06-21 21:02:01,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:02:01,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:02:01,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 171 transitions. [2024-06-21 21:02:01,854 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4523809523809524 [2024-06-21 21:02:01,854 INFO L175 Difference]: Start difference. First operand has 141 places, 194 transitions, 1917 flow. Second operand 9 states and 171 transitions. [2024-06-21 21:02:01,854 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 149 places, 220 transitions, 2423 flow [2024-06-21 21:02:01,963 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 144 places, 220 transitions, 2242 flow, removed 57 selfloop flow, removed 5 redundant places. [2024-06-21 21:02:01,967 INFO L231 Difference]: Finished difference. Result has 145 places, 194 transitions, 1892 flow [2024-06-21 21:02:01,967 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1736, PETRI_DIFFERENCE_MINUEND_PLACES=136, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=194, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=120, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1892, PETRI_PLACES=145, PETRI_TRANSITIONS=194} [2024-06-21 21:02:01,967 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 102 predicate places. [2024-06-21 21:02:01,967 INFO L495 AbstractCegarLoop]: Abstraction has has 145 places, 194 transitions, 1892 flow [2024-06-21 21:02:01,968 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:02:01,968 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:02:01,968 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:02:01,968 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-21 21:02:01,968 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)] === [2024-06-21 21:02:01,969 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:02:01,969 INFO L85 PathProgramCache]: Analyzing trace with hash -1002934426, now seen corresponding path program 10 times [2024-06-21 21:02:01,969 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:02:01,969 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1156348388] [2024-06-21 21:02:01,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:02:01,969 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:02:01,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:02:03,006 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:02:03,006 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:02:03,006 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1156348388] [2024-06-21 21:02:03,006 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1156348388] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:02:03,006 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:02:03,006 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:02:03,006 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1635521528] [2024-06-21 21:02:03,007 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:02:03,007 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:02:03,007 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:02:03,007 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:02:03,007 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:02:03,106 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 21:02:03,106 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 145 places, 194 transitions, 1892 flow. Second operand has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:02:03,106 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:02:03,106 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 21:02:03,106 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:02:03,739 INFO L124 PetriNetUnfolderBase]: 2058/3193 cut-off events. [2024-06-21 21:02:03,739 INFO L125 PetriNetUnfolderBase]: For 139151/139151 co-relation queries the response was YES. [2024-06-21 21:02:03,751 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22232 conditions, 3193 events. 2058/3193 cut-off events. For 139151/139151 co-relation queries the response was YES. Maximal size of possible extension queue 125. Compared 16170 event pairs, 526 based on Foata normal form. 2/3191 useless extension candidates. Maximal degree in co-relation 22175. Up to 2599 conditions per place. [2024-06-21 21:02:03,763 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 100 selfloop transitions, 118 changer transitions 0/224 dead transitions. [2024-06-21 21:02:03,763 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 153 places, 224 transitions, 2498 flow [2024-06-21 21:02:03,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:02:03,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:02:03,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 172 transitions. [2024-06-21 21:02:03,764 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.455026455026455 [2024-06-21 21:02:03,764 INFO L175 Difference]: Start difference. First operand has 145 places, 194 transitions, 1892 flow. Second operand 9 states and 172 transitions. [2024-06-21 21:02:03,764 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 153 places, 224 transitions, 2498 flow [2024-06-21 21:02:03,861 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 145 places, 224 transitions, 2326 flow, removed 5 selfloop flow, removed 8 redundant places. [2024-06-21 21:02:03,864 INFO L231 Difference]: Finished difference. Result has 146 places, 197 transitions, 2058 flow [2024-06-21 21:02:03,864 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1720, PETRI_DIFFERENCE_MINUEND_PLACES=137, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=194, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=115, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2058, PETRI_PLACES=146, PETRI_TRANSITIONS=197} [2024-06-21 21:02:03,864 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 103 predicate places. [2024-06-21 21:02:03,864 INFO L495 AbstractCegarLoop]: Abstraction has has 146 places, 197 transitions, 2058 flow [2024-06-21 21:02:03,864 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:02:03,864 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:02:03,864 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:02:03,865 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-21 21:02:03,865 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)] === [2024-06-21 21:02:03,865 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:02:03,865 INFO L85 PathProgramCache]: Analyzing trace with hash 884677932, now seen corresponding path program 3 times [2024-06-21 21:02:03,865 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:02:03,865 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1066745089] [2024-06-21 21:02:03,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:02:03,865 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:02:03,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:02:04,852 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:02:04,852 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:02:04,852 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1066745089] [2024-06-21 21:02:04,852 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1066745089] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:02:04,852 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:02:04,852 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:02:04,852 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1003637641] [2024-06-21 21:02:04,852 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:02:04,853 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:02:04,853 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:02:04,853 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:02:04,853 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:02:04,977 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 21:02:04,978 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 146 places, 197 transitions, 2058 flow. Second operand has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:02:04,978 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:02:04,978 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 21:02:04,978 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:02:05,617 INFO L124 PetriNetUnfolderBase]: 2075/3222 cut-off events. [2024-06-21 21:02:05,617 INFO L125 PetriNetUnfolderBase]: For 150115/150117 co-relation queries the response was YES. [2024-06-21 21:02:05,628 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23042 conditions, 3222 events. 2075/3222 cut-off events. For 150115/150117 co-relation queries the response was YES. Maximal size of possible extension queue 127. Compared 16396 event pairs, 515 based on Foata normal form. 6/3224 useless extension candidates. Maximal degree in co-relation 22984. Up to 2861 conditions per place. [2024-06-21 21:02:05,639 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 164 selfloop transitions, 56 changer transitions 0/226 dead transitions. [2024-06-21 21:02:05,639 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 154 places, 226 transitions, 2624 flow [2024-06-21 21:02:05,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:02:05,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:02:05,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 168 transitions. [2024-06-21 21:02:05,640 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4444444444444444 [2024-06-21 21:02:05,640 INFO L175 Difference]: Start difference. First operand has 146 places, 197 transitions, 2058 flow. Second operand 9 states and 168 transitions. [2024-06-21 21:02:05,641 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 154 places, 226 transitions, 2624 flow [2024-06-21 21:02:05,727 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 147 places, 226 transitions, 2310 flow, removed 41 selfloop flow, removed 7 redundant places. [2024-06-21 21:02:05,730 INFO L231 Difference]: Finished difference. Result has 148 places, 199 transitions, 1913 flow [2024-06-21 21:02:05,730 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1744, PETRI_DIFFERENCE_MINUEND_PLACES=139, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=197, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=141, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1913, PETRI_PLACES=148, PETRI_TRANSITIONS=199} [2024-06-21 21:02:05,730 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 105 predicate places. [2024-06-21 21:02:05,730 INFO L495 AbstractCegarLoop]: Abstraction has has 148 places, 199 transitions, 1913 flow [2024-06-21 21:02:05,730 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:02:05,730 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:02:05,730 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:02:05,730 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-21 21:02:05,731 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)] === [2024-06-21 21:02:05,731 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:02:05,731 INFO L85 PathProgramCache]: Analyzing trace with hash 648502572, now seen corresponding path program 4 times [2024-06-21 21:02:05,731 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:02:05,731 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1193233049] [2024-06-21 21:02:05,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:02:05,731 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:02:05,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:02:06,709 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:02:06,709 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:02:06,710 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1193233049] [2024-06-21 21:02:06,710 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1193233049] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:02:06,710 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:02:06,710 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:02:06,710 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2118432797] [2024-06-21 21:02:06,710 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:02:06,710 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:02:06,710 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:02:06,710 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:02:06,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:02:06,810 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 21:02:06,811 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 148 places, 199 transitions, 1913 flow. Second operand has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:02:06,811 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:02:06,811 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 21:02:06,811 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:02:07,420 INFO L124 PetriNetUnfolderBase]: 2092/3249 cut-off events. [2024-06-21 21:02:07,420 INFO L125 PetriNetUnfolderBase]: For 157280/157282 co-relation queries the response was YES. [2024-06-21 21:02:07,432 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23128 conditions, 3249 events. 2092/3249 cut-off events. For 157280/157282 co-relation queries the response was YES. Maximal size of possible extension queue 129. Compared 16504 event pairs, 520 based on Foata normal form. 6/3251 useless extension candidates. Maximal degree in co-relation 23069. Up to 2932 conditions per place. [2024-06-21 21:02:07,444 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 178 selfloop transitions, 44 changer transitions 0/228 dead transitions. [2024-06-21 21:02:07,444 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 156 places, 228 transitions, 2487 flow [2024-06-21 21:02:07,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:02:07,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:02:07,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 168 transitions. [2024-06-21 21:02:07,446 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4444444444444444 [2024-06-21 21:02:07,446 INFO L175 Difference]: Start difference. First operand has 148 places, 199 transitions, 1913 flow. Second operand 9 states and 168 transitions. [2024-06-21 21:02:07,446 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 156 places, 228 transitions, 2487 flow [2024-06-21 21:02:07,579 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 149 places, 228 transitions, 2340 flow, removed 19 selfloop flow, removed 7 redundant places. [2024-06-21 21:02:07,582 INFO L231 Difference]: Finished difference. Result has 150 places, 201 transitions, 1915 flow [2024-06-21 21:02:07,582 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1766, PETRI_DIFFERENCE_MINUEND_PLACES=141, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=199, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=155, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1915, PETRI_PLACES=150, PETRI_TRANSITIONS=201} [2024-06-21 21:02:07,582 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 107 predicate places. [2024-06-21 21:02:07,582 INFO L495 AbstractCegarLoop]: Abstraction has has 150 places, 201 transitions, 1915 flow [2024-06-21 21:02:07,583 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:02:07,583 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:02:07,583 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:02:07,583 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-21 21:02:07,583 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)] === [2024-06-21 21:02:07,583 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:02:07,583 INFO L85 PathProgramCache]: Analyzing trace with hash 876403722, now seen corresponding path program 5 times [2024-06-21 21:02:07,583 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:02:07,583 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1241983578] [2024-06-21 21:02:07,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:02:07,583 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:02:07,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:02:08,562 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:02:08,562 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:02:08,562 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1241983578] [2024-06-21 21:02:08,562 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1241983578] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:02:08,562 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:02:08,562 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:02:08,563 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1461885374] [2024-06-21 21:02:08,563 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:02:08,563 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:02:08,563 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:02:08,563 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:02:08,563 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:02:08,686 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 21:02:08,686 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 150 places, 201 transitions, 1915 flow. Second operand has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:02:08,686 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:02:08,686 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 21:02:08,687 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:02:09,359 INFO L124 PetriNetUnfolderBase]: 2084/3237 cut-off events. [2024-06-21 21:02:09,360 INFO L125 PetriNetUnfolderBase]: For 162325/162327 co-relation queries the response was YES. [2024-06-21 21:02:09,372 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23042 conditions, 3237 events. 2084/3237 cut-off events. For 162325/162327 co-relation queries the response was YES. Maximal size of possible extension queue 128. Compared 16442 event pairs, 518 based on Foata normal form. 6/3239 useless extension candidates. Maximal degree in co-relation 22982. Up to 2920 conditions per place. [2024-06-21 21:02:09,382 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 177 selfloop transitions, 45 changer transitions 0/228 dead transitions. [2024-06-21 21:02:09,382 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 158 places, 228 transitions, 2439 flow [2024-06-21 21:02:09,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:02:09,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:02:09,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 167 transitions. [2024-06-21 21:02:09,383 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4417989417989418 [2024-06-21 21:02:09,383 INFO L175 Difference]: Start difference. First operand has 150 places, 201 transitions, 1915 flow. Second operand 9 states and 167 transitions. [2024-06-21 21:02:09,384 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 158 places, 228 transitions, 2439 flow [2024-06-21 21:02:09,488 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 151 places, 228 transitions, 2280 flow, removed 37 selfloop flow, removed 7 redundant places. [2024-06-21 21:02:09,491 INFO L231 Difference]: Finished difference. Result has 152 places, 201 transitions, 1853 flow [2024-06-21 21:02:09,491 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1756, PETRI_DIFFERENCE_MINUEND_PLACES=143, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=201, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=156, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1853, PETRI_PLACES=152, PETRI_TRANSITIONS=201} [2024-06-21 21:02:09,492 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 109 predicate places. [2024-06-21 21:02:09,492 INFO L495 AbstractCegarLoop]: Abstraction has has 152 places, 201 transitions, 1853 flow [2024-06-21 21:02:09,492 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:02:09,492 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:02:09,492 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:02:09,492 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-21 21:02:09,492 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)] === [2024-06-21 21:02:09,493 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:02:09,493 INFO L85 PathProgramCache]: Analyzing trace with hash 879845692, now seen corresponding path program 2 times [2024-06-21 21:02:09,493 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:02:09,493 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [119931591] [2024-06-21 21:02:09,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:02:09,493 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:02:09,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:02:10,197 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:02:10,197 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:02:10,198 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [119931591] [2024-06-21 21:02:10,198 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [119931591] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:02:10,198 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:02:10,198 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 21:02:10,198 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1026141520] [2024-06-21 21:02:10,198 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:02:10,198 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 21:02:10,198 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:02:10,199 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 21:02:10,199 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2024-06-21 21:02:10,269 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 21:02:10,269 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 152 places, 201 transitions, 1853 flow. Second operand has 8 states, 8 states have (on average 11.625) internal successors, (93), 8 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:02:10,269 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:02:10,270 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 21:02:10,270 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:02:10,971 INFO L124 PetriNetUnfolderBase]: 2078/3227 cut-off events. [2024-06-21 21:02:10,972 INFO L125 PetriNetUnfolderBase]: For 166189/166189 co-relation queries the response was YES. [2024-06-21 21:02:10,989 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23022 conditions, 3227 events. 2078/3227 cut-off events. For 166189/166189 co-relation queries the response was YES. Maximal size of possible extension queue 127. Compared 16379 event pairs, 523 based on Foata normal form. 2/3225 useless extension candidates. Maximal degree in co-relation 22961. Up to 2985 conditions per place. [2024-06-21 21:02:11,005 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 184 selfloop transitions, 22 changer transitions 0/212 dead transitions. [2024-06-21 21:02:11,005 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 157 places, 212 transitions, 2307 flow [2024-06-21 21:02:11,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 21:02:11,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 21:02:11,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 111 transitions. [2024-06-21 21:02:11,006 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44047619047619047 [2024-06-21 21:02:11,006 INFO L175 Difference]: Start difference. First operand has 152 places, 201 transitions, 1853 flow. Second operand 6 states and 111 transitions. [2024-06-21 21:02:11,007 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 157 places, 212 transitions, 2307 flow [2024-06-21 21:02:11,126 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 149 places, 212 transitions, 2171 flow, removed 17 selfloop flow, removed 8 redundant places. [2024-06-21 21:02:11,129 INFO L231 Difference]: Finished difference. Result has 150 places, 201 transitions, 1767 flow [2024-06-21 21:02:11,129 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1717, PETRI_DIFFERENCE_MINUEND_PLACES=144, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=201, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=179, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1767, PETRI_PLACES=150, PETRI_TRANSITIONS=201} [2024-06-21 21:02:11,129 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 107 predicate places. [2024-06-21 21:02:11,130 INFO L495 AbstractCegarLoop]: Abstraction has has 150 places, 201 transitions, 1767 flow [2024-06-21 21:02:11,130 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.625) internal successors, (93), 8 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:02:11,130 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:02:11,130 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:02:11,130 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-21 21:02:11,131 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)] === [2024-06-21 21:02:11,131 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:02:11,131 INFO L85 PathProgramCache]: Analyzing trace with hash 1405106918, now seen corresponding path program 1 times [2024-06-21 21:02:11,131 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:02:11,131 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [395527749] [2024-06-21 21:02:11,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:02:11,132 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:02:11,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:02:11,780 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:02:11,780 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:02:11,780 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [395527749] [2024-06-21 21:02:11,780 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [395527749] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:02:11,780 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:02:11,781 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 21:02:11,781 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1092870824] [2024-06-21 21:02:11,781 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:02:11,781 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 21:02:11,781 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:02:11,782 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 21:02:11,782 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-21 21:02:11,854 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-21 21:02:11,855 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 150 places, 201 transitions, 1767 flow. Second operand has 7 states, 7 states have (on average 12.857142857142858) internal successors, (90), 7 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:02:11,855 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:02:11,855 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-21 21:02:11,855 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:02:12,324 INFO L124 PetriNetUnfolderBase]: 1876/3004 cut-off events. [2024-06-21 21:02:12,325 INFO L125 PetriNetUnfolderBase]: For 148608/148608 co-relation queries the response was YES. [2024-06-21 21:02:12,337 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20690 conditions, 3004 events. 1876/3004 cut-off events. For 148608/148608 co-relation queries the response was YES. Maximal size of possible extension queue 126. Compared 15689 event pairs, 467 based on Foata normal form. 1/3003 useless extension candidates. Maximal degree in co-relation 20628. Up to 2743 conditions per place. [2024-06-21 21:02:12,348 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 194 selfloop transitions, 18 changer transitions 0/219 dead transitions. [2024-06-21 21:02:12,348 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 156 places, 219 transitions, 2347 flow [2024-06-21 21:02:12,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 21:02:12,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 21:02:12,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 129 transitions. [2024-06-21 21:02:12,349 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4387755102040816 [2024-06-21 21:02:12,349 INFO L175 Difference]: Start difference. First operand has 150 places, 201 transitions, 1767 flow. Second operand 7 states and 129 transitions. [2024-06-21 21:02:12,349 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 156 places, 219 transitions, 2347 flow [2024-06-21 21:02:12,487 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 151 places, 219 transitions, 2286 flow, removed 3 selfloop flow, removed 5 redundant places. [2024-06-21 21:02:12,490 INFO L231 Difference]: Finished difference. Result has 152 places, 207 transitions, 1802 flow [2024-06-21 21:02:12,490 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1706, PETRI_DIFFERENCE_MINUEND_PLACES=145, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=201, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=186, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1802, PETRI_PLACES=152, PETRI_TRANSITIONS=207} [2024-06-21 21:02:12,490 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 109 predicate places. [2024-06-21 21:02:12,490 INFO L495 AbstractCegarLoop]: Abstraction has has 152 places, 207 transitions, 1802 flow [2024-06-21 21:02:12,490 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.857142857142858) internal successors, (90), 7 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:02:12,490 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:02:12,491 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:02:12,491 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-21 21:02:12,491 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)] === [2024-06-21 21:02:12,491 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:02:12,491 INFO L85 PathProgramCache]: Analyzing trace with hash 1853930854, now seen corresponding path program 2 times [2024-06-21 21:02:12,491 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:02:12,491 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1343307076] [2024-06-21 21:02:12,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:02:12,491 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:02:12,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:02:13,117 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:02:13,118 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:02:13,118 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1343307076] [2024-06-21 21:02:13,118 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1343307076] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:02:13,119 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:02:13,119 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 21:02:13,119 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1489021272] [2024-06-21 21:02:13,119 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:02:13,119 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 21:02:13,119 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:02:13,119 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 21:02:13,119 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-21 21:02:13,185 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-21 21:02:13,185 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 152 places, 207 transitions, 1802 flow. Second operand has 7 states, 7 states have (on average 12.857142857142858) internal successors, (90), 7 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:02:13,185 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:02:13,185 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-21 21:02:13,185 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:02:13,706 INFO L124 PetriNetUnfolderBase]: 1873/3000 cut-off events. [2024-06-21 21:02:13,706 INFO L125 PetriNetUnfolderBase]: For 155253/155253 co-relation queries the response was YES. [2024-06-21 21:02:13,718 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21081 conditions, 3000 events. 1873/3000 cut-off events. For 155253/155253 co-relation queries the response was YES. Maximal size of possible extension queue 125. Compared 15688 event pairs, 466 based on Foata normal form. 1/2999 useless extension candidates. Maximal degree in co-relation 21018. Up to 2752 conditions per place. [2024-06-21 21:02:13,730 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 195 selfloop transitions, 13 changer transitions 0/215 dead transitions. [2024-06-21 21:02:13,730 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 158 places, 215 transitions, 2240 flow [2024-06-21 21:02:13,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 21:02:13,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 21:02:13,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 123 transitions. [2024-06-21 21:02:13,731 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41836734693877553 [2024-06-21 21:02:13,731 INFO L175 Difference]: Start difference. First operand has 152 places, 207 transitions, 1802 flow. Second operand 7 states and 123 transitions. [2024-06-21 21:02:13,731 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 158 places, 215 transitions, 2240 flow [2024-06-21 21:02:13,886 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 156 places, 215 transitions, 2194 flow, removed 18 selfloop flow, removed 2 redundant places. [2024-06-21 21:02:13,888 INFO L231 Difference]: Finished difference. Result has 157 places, 207 transitions, 1788 flow [2024-06-21 21:02:13,889 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1756, PETRI_DIFFERENCE_MINUEND_PLACES=150, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=207, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=194, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1788, PETRI_PLACES=157, PETRI_TRANSITIONS=207} [2024-06-21 21:02:13,889 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 114 predicate places. [2024-06-21 21:02:13,889 INFO L495 AbstractCegarLoop]: Abstraction has has 157 places, 207 transitions, 1788 flow [2024-06-21 21:02:13,889 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.857142857142858) internal successors, (90), 7 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:02:13,890 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:02:13,890 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:02:13,890 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-21 21:02:13,890 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)] === [2024-06-21 21:02:13,890 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:02:13,890 INFO L85 PathProgramCache]: Analyzing trace with hash 1821851000, now seen corresponding path program 1 times [2024-06-21 21:02:13,891 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:02:13,891 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [963287609] [2024-06-21 21:02:13,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:02:13,891 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:02:13,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:02:14,688 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:02:14,689 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:02:14,689 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [963287609] [2024-06-21 21:02:14,689 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [963287609] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:02:14,689 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:02:14,689 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:02:14,689 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [222175838] [2024-06-21 21:02:14,689 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:02:14,689 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:02:14,689 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:02:14,690 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:02:14,690 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:02:14,755 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 21:02:14,755 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 157 places, 207 transitions, 1788 flow. Second operand has 9 states, 9 states have (on average 11.555555555555555) internal successors, (104), 9 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:02:14,755 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:02:14,755 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 21:02:14,755 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:02:15,427 INFO L124 PetriNetUnfolderBase]: 1983/3108 cut-off events. [2024-06-21 21:02:15,428 INFO L125 PetriNetUnfolderBase]: For 162184/162184 co-relation queries the response was YES. [2024-06-21 21:02:15,441 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21848 conditions, 3108 events. 1983/3108 cut-off events. For 162184/162184 co-relation queries the response was YES. Maximal size of possible extension queue 125. Compared 15798 event pairs, 502 based on Foata normal form. 2/3108 useless extension candidates. Maximal degree in co-relation 21783. Up to 2943 conditions per place. [2024-06-21 21:02:15,452 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 200 selfloop transitions, 15 changer transitions 0/220 dead transitions. [2024-06-21 21:02:15,452 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 163 places, 220 transitions, 2276 flow [2024-06-21 21:02:15,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 21:02:15,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 21:02:15,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 121 transitions. [2024-06-21 21:02:15,453 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41156462585034015 [2024-06-21 21:02:15,453 INFO L175 Difference]: Start difference. First operand has 157 places, 207 transitions, 1788 flow. Second operand 7 states and 121 transitions. [2024-06-21 21:02:15,453 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 163 places, 220 transitions, 2276 flow [2024-06-21 21:02:15,587 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 156 places, 220 transitions, 2235 flow, removed 2 selfloop flow, removed 7 redundant places. [2024-06-21 21:02:15,590 INFO L231 Difference]: Finished difference. Result has 157 places, 210 transitions, 1821 flow [2024-06-21 21:02:15,590 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1747, PETRI_DIFFERENCE_MINUEND_PLACES=150, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=207, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=192, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1821, PETRI_PLACES=157, PETRI_TRANSITIONS=210} [2024-06-21 21:02:15,590 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 114 predicate places. [2024-06-21 21:02:15,590 INFO L495 AbstractCegarLoop]: Abstraction has has 157 places, 210 transitions, 1821 flow [2024-06-21 21:02:15,591 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.555555555555555) internal successors, (104), 9 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:02:15,591 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:02:15,591 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:02:15,591 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-21 21:02:15,591 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)] === [2024-06-21 21:02:15,591 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:02:15,591 INFO L85 PathProgramCache]: Analyzing trace with hash -218140560, now seen corresponding path program 1 times [2024-06-21 21:02:15,592 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:02:15,592 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [428558367] [2024-06-21 21:02:15,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:02:15,592 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:02:15,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:02:16,947 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:02:16,947 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:02:16,948 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [428558367] [2024-06-21 21:02:16,948 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [428558367] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:02:16,948 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:02:16,948 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 21:02:16,948 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [546826029] [2024-06-21 21:02:16,948 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:02:16,948 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 21:02:16,948 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:02:16,949 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 21:02:16,949 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-21 21:02:17,088 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 21:02:17,088 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 157 places, 210 transitions, 1821 flow. Second operand has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:02:17,088 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:02:17,088 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 21:02:17,088 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:02:17,811 INFO L124 PetriNetUnfolderBase]: 2132/3319 cut-off events. [2024-06-21 21:02:17,811 INFO L125 PetriNetUnfolderBase]: For 208128/208128 co-relation queries the response was YES. [2024-06-21 21:02:17,825 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24863 conditions, 3319 events. 2132/3319 cut-off events. For 208128/208128 co-relation queries the response was YES. Maximal size of possible extension queue 133. Compared 16932 event pairs, 515 based on Foata normal form. 16/3333 useless extension candidates. Maximal degree in co-relation 24798. Up to 2979 conditions per place. [2024-06-21 21:02:17,837 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 215 selfloop transitions, 29 changer transitions 0/250 dead transitions. [2024-06-21 21:02:17,838 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 166 places, 250 transitions, 2513 flow [2024-06-21 21:02:17,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 21:02:17,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 21:02:17,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 189 transitions. [2024-06-21 21:02:17,839 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45 [2024-06-21 21:02:17,839 INFO L175 Difference]: Start difference. First operand has 157 places, 210 transitions, 1821 flow. Second operand 10 states and 189 transitions. [2024-06-21 21:02:17,839 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 166 places, 250 transitions, 2513 flow [2024-06-21 21:02:18,036 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 161 places, 250 transitions, 2461 flow, removed 13 selfloop flow, removed 5 redundant places. [2024-06-21 21:02:18,039 INFO L231 Difference]: Finished difference. Result has 162 places, 211 transitions, 1886 flow [2024-06-21 21:02:18,039 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1769, PETRI_DIFFERENCE_MINUEND_PLACES=152, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=210, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=181, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1886, PETRI_PLACES=162, PETRI_TRANSITIONS=211} [2024-06-21 21:02:18,039 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 119 predicate places. [2024-06-21 21:02:18,040 INFO L495 AbstractCegarLoop]: Abstraction has has 162 places, 211 transitions, 1886 flow [2024-06-21 21:02:18,040 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:02:18,040 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:02:18,040 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:02:18,040 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-21 21:02:18,040 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)] === [2024-06-21 21:02:18,040 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:02:18,040 INFO L85 PathProgramCache]: Analyzing trace with hash -140026208, now seen corresponding path program 2 times [2024-06-21 21:02:18,040 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:02:18,041 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1449023010] [2024-06-21 21:02:18,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:02:18,041 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:02:18,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:02:19,337 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:02:19,337 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:02:19,337 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1449023010] [2024-06-21 21:02:19,337 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1449023010] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:02:19,338 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:02:19,338 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 21:02:19,338 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [682670807] [2024-06-21 21:02:19,338 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:02:19,338 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 21:02:19,338 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:02:19,338 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 21:02:19,338 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-21 21:02:19,465 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 21:02:19,465 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 162 places, 211 transitions, 1886 flow. Second operand has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:02:19,465 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:02:19,465 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 21:02:19,466 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:02:20,281 INFO L124 PetriNetUnfolderBase]: 2207/3444 cut-off events. [2024-06-21 21:02:20,281 INFO L125 PetriNetUnfolderBase]: For 222519/222519 co-relation queries the response was YES. [2024-06-21 21:02:20,296 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26017 conditions, 3444 events. 2207/3444 cut-off events. For 222519/222519 co-relation queries the response was YES. Maximal size of possible extension queue 146. Compared 17832 event pairs, 522 based on Foata normal form. 16/3458 useless extension candidates. Maximal degree in co-relation 25951. Up to 2987 conditions per place. [2024-06-21 21:02:20,308 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 187 selfloop transitions, 57 changer transitions 0/250 dead transitions. [2024-06-21 21:02:20,309 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 171 places, 250 transitions, 2578 flow [2024-06-21 21:02:20,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 21:02:20,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 21:02:20,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 189 transitions. [2024-06-21 21:02:20,310 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45 [2024-06-21 21:02:20,310 INFO L175 Difference]: Start difference. First operand has 162 places, 211 transitions, 1886 flow. Second operand 10 states and 189 transitions. [2024-06-21 21:02:20,310 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 171 places, 250 transitions, 2578 flow [2024-06-21 21:02:20,471 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 163 places, 250 transitions, 2503 flow, removed 10 selfloop flow, removed 8 redundant places. [2024-06-21 21:02:20,474 INFO L231 Difference]: Finished difference. Result has 164 places, 213 transitions, 1996 flow [2024-06-21 21:02:20,474 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1811, PETRI_DIFFERENCE_MINUEND_PLACES=154, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=211, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=154, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1996, PETRI_PLACES=164, PETRI_TRANSITIONS=213} [2024-06-21 21:02:20,474 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 121 predicate places. [2024-06-21 21:02:20,475 INFO L495 AbstractCegarLoop]: Abstraction has has 164 places, 213 transitions, 1996 flow [2024-06-21 21:02:20,477 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:02:20,477 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:02:20,477 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:02:20,477 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-21 21:02:20,477 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)] === [2024-06-21 21:02:20,478 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:02:20,478 INFO L85 PathProgramCache]: Analyzing trace with hash -139824398, now seen corresponding path program 3 times [2024-06-21 21:02:20,478 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:02:20,478 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [535060074] [2024-06-21 21:02:20,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:02:20,478 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:02:20,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:02:21,667 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:02:21,667 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:02:21,668 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [535060074] [2024-06-21 21:02:21,668 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [535060074] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:02:21,668 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:02:21,668 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 21:02:21,668 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [784598298] [2024-06-21 21:02:21,668 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:02:21,669 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 21:02:21,669 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:02:21,669 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 21:02:21,669 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-21 21:02:21,845 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 21:02:21,845 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 164 places, 213 transitions, 1996 flow. Second operand has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:02:21,845 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:02:21,845 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 21:02:21,845 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:02:22,651 INFO L124 PetriNetUnfolderBase]: 2265/3552 cut-off events. [2024-06-21 21:02:22,651 INFO L125 PetriNetUnfolderBase]: For 235831/235831 co-relation queries the response was YES. [2024-06-21 21:02:22,667 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27096 conditions, 3552 events. 2265/3552 cut-off events. For 235831/235831 co-relation queries the response was YES. Maximal size of possible extension queue 156. Compared 18643 event pairs, 542 based on Foata normal form. 16/3566 useless extension candidates. Maximal degree in co-relation 27029. Up to 3027 conditions per place. [2024-06-21 21:02:22,681 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 173 selfloop transitions, 72 changer transitions 0/251 dead transitions. [2024-06-21 21:02:22,681 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 173 places, 251 transitions, 2688 flow [2024-06-21 21:02:22,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 21:02:22,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 21:02:22,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 190 transitions. [2024-06-21 21:02:22,683 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4523809523809524 [2024-06-21 21:02:22,683 INFO L175 Difference]: Start difference. First operand has 164 places, 213 transitions, 1996 flow. Second operand 10 states and 190 transitions. [2024-06-21 21:02:22,683 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 173 places, 251 transitions, 2688 flow [2024-06-21 21:02:22,865 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 165 places, 251 transitions, 2557 flow, removed 10 selfloop flow, removed 8 redundant places. [2024-06-21 21:02:22,867 INFO L231 Difference]: Finished difference. Result has 166 places, 214 transitions, 2072 flow [2024-06-21 21:02:22,867 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1865, PETRI_DIFFERENCE_MINUEND_PLACES=156, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=213, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=141, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2072, PETRI_PLACES=166, PETRI_TRANSITIONS=214} [2024-06-21 21:02:22,868 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 123 predicate places. [2024-06-21 21:02:22,868 INFO L495 AbstractCegarLoop]: Abstraction has has 166 places, 214 transitions, 2072 flow [2024-06-21 21:02:22,868 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:02:22,868 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:02:22,868 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:02:22,868 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-21 21:02:22,869 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)] === [2024-06-21 21:02:22,869 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:02:22,869 INFO L85 PathProgramCache]: Analyzing trace with hash -139816958, now seen corresponding path program 4 times [2024-06-21 21:02:22,869 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:02:22,869 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [3977850] [2024-06-21 21:02:22,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:02:22,870 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:02:22,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:02:23,980 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:02:23,981 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:02:23,981 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [3977850] [2024-06-21 21:02:23,981 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [3977850] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:02:23,981 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:02:23,981 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 21:02:23,981 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1825122295] [2024-06-21 21:02:23,981 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:02:23,982 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 21:02:23,982 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:02:23,982 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 21:02:23,982 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-21 21:02:24,168 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 21:02:24,169 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 166 places, 214 transitions, 2072 flow. Second operand has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:02:24,169 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:02:24,169 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 21:02:24,169 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:02:25,066 INFO L124 PetriNetUnfolderBase]: 2433/3836 cut-off events. [2024-06-21 21:02:25,067 INFO L125 PetriNetUnfolderBase]: For 264758/264758 co-relation queries the response was YES. [2024-06-21 21:02:25,085 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30170 conditions, 3836 events. 2433/3836 cut-off events. For 264758/264758 co-relation queries the response was YES. Maximal size of possible extension queue 178. Compared 20756 event pairs, 569 based on Foata normal form. 12/3846 useless extension candidates. Maximal degree in co-relation 30102. Up to 2912 conditions per place. [2024-06-21 21:02:25,100 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 176 selfloop transitions, 77 changer transitions 0/259 dead transitions. [2024-06-21 21:02:25,101 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 175 places, 259 transitions, 3062 flow [2024-06-21 21:02:25,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 21:02:25,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 21:02:25,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 194 transitions. [2024-06-21 21:02:25,102 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46190476190476193 [2024-06-21 21:02:25,102 INFO L175 Difference]: Start difference. First operand has 166 places, 214 transitions, 2072 flow. Second operand 10 states and 194 transitions. [2024-06-21 21:02:25,102 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 175 places, 259 transitions, 3062 flow [2024-06-21 21:02:25,326 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 167 places, 259 transitions, 2897 flow, removed 12 selfloop flow, removed 8 redundant places. [2024-06-21 21:02:25,329 INFO L231 Difference]: Finished difference. Result has 169 places, 217 transitions, 2232 flow [2024-06-21 21:02:25,329 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1907, PETRI_DIFFERENCE_MINUEND_PLACES=158, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=214, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=138, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2232, PETRI_PLACES=169, PETRI_TRANSITIONS=217} [2024-06-21 21:02:25,330 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 126 predicate places. [2024-06-21 21:02:25,330 INFO L495 AbstractCegarLoop]: Abstraction has has 169 places, 217 transitions, 2232 flow [2024-06-21 21:02:25,330 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:02:25,330 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:02:25,330 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:02:25,330 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-21 21:02:25,330 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)] === [2024-06-21 21:02:25,330 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:02:25,331 INFO L85 PathProgramCache]: Analyzing trace with hash -145388588, now seen corresponding path program 5 times [2024-06-21 21:02:25,331 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:02:25,331 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1581813602] [2024-06-21 21:02:25,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:02:25,331 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:02:25,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:02:26,767 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:02:26,767 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:02:26,767 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1581813602] [2024-06-21 21:02:26,767 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1581813602] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:02:26,767 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:02:26,767 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 21:02:26,767 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [875819877] [2024-06-21 21:02:26,767 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:02:26,768 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 21:02:26,768 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:02:26,768 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 21:02:26,768 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-21 21:02:26,901 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 21:02:26,901 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 169 places, 217 transitions, 2232 flow. Second operand has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:02:26,901 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:02:26,901 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 21:02:26,901 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:02:27,843 INFO L124 PetriNetUnfolderBase]: 2560/4048 cut-off events. [2024-06-21 21:02:27,843 INFO L125 PetriNetUnfolderBase]: For 297409/297409 co-relation queries the response was YES. [2024-06-21 21:02:27,862 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32054 conditions, 4048 events. 2560/4048 cut-off events. For 297409/297409 co-relation queries the response was YES. Maximal size of possible extension queue 197. Compared 22311 event pairs, 619 based on Foata normal form. 28/4073 useless extension candidates. Maximal degree in co-relation 31984. Up to 3577 conditions per place. [2024-06-21 21:02:27,877 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 208 selfloop transitions, 48 changer transitions 0/262 dead transitions. [2024-06-21 21:02:27,877 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 179 places, 262 transitions, 3065 flow [2024-06-21 21:02:27,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 21:02:27,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 21:02:27,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 200 transitions. [2024-06-21 21:02:27,880 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4329004329004329 [2024-06-21 21:02:27,881 INFO L175 Difference]: Start difference. First operand has 169 places, 217 transitions, 2232 flow. Second operand 11 states and 200 transitions. [2024-06-21 21:02:27,881 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 179 places, 262 transitions, 3065 flow [2024-06-21 21:02:28,099 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 173 places, 262 transitions, 2934 flow, removed 17 selfloop flow, removed 6 redundant places. [2024-06-21 21:02:28,102 INFO L231 Difference]: Finished difference. Result has 177 places, 226 transitions, 2425 flow [2024-06-21 21:02:28,102 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2108, PETRI_DIFFERENCE_MINUEND_PLACES=163, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=217, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=169, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2425, PETRI_PLACES=177, PETRI_TRANSITIONS=226} [2024-06-21 21:02:28,102 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 134 predicate places. [2024-06-21 21:02:28,102 INFO L495 AbstractCegarLoop]: Abstraction has has 177 places, 226 transitions, 2425 flow [2024-06-21 21:02:28,103 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:02:28,103 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:02:28,103 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:02:28,103 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-21 21:02:28,103 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)] === [2024-06-21 21:02:28,104 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:02:28,104 INFO L85 PathProgramCache]: Analyzing trace with hash -1336275206, now seen corresponding path program 1 times [2024-06-21 21:02:28,104 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:02:28,104 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1655300557] [2024-06-21 21:02:28,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:02:28,104 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:02:28,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:02:28,911 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:02:28,911 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:02:28,911 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1655300557] [2024-06-21 21:02:28,911 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1655300557] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:02:28,911 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:02:28,911 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:02:28,911 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1701441972] [2024-06-21 21:02:28,912 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:02:28,912 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:02:28,912 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:02:28,912 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:02:28,912 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:02:28,987 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 21:02:28,987 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 177 places, 226 transitions, 2425 flow. Second operand has 9 states, 9 states have (on average 10.555555555555555) internal successors, (95), 9 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:02:28,987 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:02:28,987 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 21:02:28,987 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:02:29,884 INFO L124 PetriNetUnfolderBase]: 2683/4177 cut-off events. [2024-06-21 21:02:29,884 INFO L125 PetriNetUnfolderBase]: For 284245/284245 co-relation queries the response was YES. [2024-06-21 21:02:29,902 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33165 conditions, 4177 events. 2683/4177 cut-off events. For 284245/284245 co-relation queries the response was YES. Maximal size of possible extension queue 198. Compared 22647 event pairs, 661 based on Foata normal form. 2/4177 useless extension candidates. Maximal degree in co-relation 33090. Up to 3988 conditions per place. [2024-06-21 21:02:29,916 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 217 selfloop transitions, 30 changer transitions 0/251 dead transitions. [2024-06-21 21:02:29,917 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 183 places, 251 transitions, 3167 flow [2024-06-21 21:02:29,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 21:02:29,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 21:02:29,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 128 transitions. [2024-06-21 21:02:29,918 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43537414965986393 [2024-06-21 21:02:29,918 INFO L175 Difference]: Start difference. First operand has 177 places, 226 transitions, 2425 flow. Second operand 7 states and 128 transitions. [2024-06-21 21:02:29,918 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 183 places, 251 transitions, 3167 flow [2024-06-21 21:02:30,216 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 177 places, 251 transitions, 3039 flow, removed 25 selfloop flow, removed 6 redundant places. [2024-06-21 21:02:30,219 INFO L231 Difference]: Finished difference. Result has 178 places, 232 transitions, 2457 flow [2024-06-21 21:02:30,219 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2297, PETRI_DIFFERENCE_MINUEND_PLACES=171, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=226, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=199, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2457, PETRI_PLACES=178, PETRI_TRANSITIONS=232} [2024-06-21 21:02:30,219 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 135 predicate places. [2024-06-21 21:02:30,220 INFO L495 AbstractCegarLoop]: Abstraction has has 178 places, 232 transitions, 2457 flow [2024-06-21 21:02:30,220 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.555555555555555) internal successors, (95), 9 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:02:30,220 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:02:30,220 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:02:30,220 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-21 21:02:30,220 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)] === [2024-06-21 21:02:30,220 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:02:30,220 INFO L85 PathProgramCache]: Analyzing trace with hash -1376827472, now seen corresponding path program 6 times [2024-06-21 21:02:30,220 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:02:30,220 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1904055894] [2024-06-21 21:02:30,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:02:30,221 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:02:30,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:02:31,572 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:02:31,572 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:02:31,572 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1904055894] [2024-06-21 21:02:31,572 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1904055894] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:02:31,572 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:02:31,572 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 21:02:31,572 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1917455034] [2024-06-21 21:02:31,572 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:02:31,572 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 21:02:31,573 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:02:31,573 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 21:02:31,573 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-21 21:02:31,691 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 21:02:31,692 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 178 places, 232 transitions, 2457 flow. Second operand has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:02:31,692 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:02:31,692 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 21:02:31,692 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:02:32,689 INFO L124 PetriNetUnfolderBase]: 2655/4200 cut-off events. [2024-06-21 21:02:32,690 INFO L125 PetriNetUnfolderBase]: For 309276/309278 co-relation queries the response was YES. [2024-06-21 21:02:32,709 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33786 conditions, 4200 events. 2655/4200 cut-off events. For 309276/309278 co-relation queries the response was YES. Maximal size of possible extension queue 210. Compared 23413 event pairs, 642 based on Foata normal form. 18/4215 useless extension candidates. Maximal degree in co-relation 33710. Up to 3663 conditions per place. [2024-06-21 21:02:32,724 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 184 selfloop transitions, 77 changer transitions 0/269 dead transitions. [2024-06-21 21:02:32,724 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 187 places, 269 transitions, 3187 flow [2024-06-21 21:02:32,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 21:02:32,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 21:02:32,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 190 transitions. [2024-06-21 21:02:32,725 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4523809523809524 [2024-06-21 21:02:32,725 INFO L175 Difference]: Start difference. First operand has 178 places, 232 transitions, 2457 flow. Second operand 10 states and 190 transitions. [2024-06-21 21:02:32,725 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 187 places, 269 transitions, 3187 flow [2024-06-21 21:02:33,041 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 184 places, 269 transitions, 3131 flow, removed 19 selfloop flow, removed 3 redundant places. [2024-06-21 21:02:33,044 INFO L231 Difference]: Finished difference. Result has 185 places, 234 transitions, 2632 flow [2024-06-21 21:02:33,044 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2401, PETRI_DIFFERENCE_MINUEND_PLACES=175, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=232, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=155, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2632, PETRI_PLACES=185, PETRI_TRANSITIONS=234} [2024-06-21 21:02:33,045 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 142 predicate places. [2024-06-21 21:02:33,045 INFO L495 AbstractCegarLoop]: Abstraction has has 185 places, 234 transitions, 2632 flow [2024-06-21 21:02:33,045 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:02:33,045 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:02:33,045 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:02:33,045 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-21 21:02:33,046 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)] === [2024-06-21 21:02:33,046 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:02:33,046 INFO L85 PathProgramCache]: Analyzing trace with hash -1371465092, now seen corresponding path program 7 times [2024-06-21 21:02:33,046 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:02:33,046 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [582245805] [2024-06-21 21:02:33,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:02:33,047 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:02:33,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:02:34,484 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:02:34,485 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:02:34,485 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [582245805] [2024-06-21 21:02:34,485 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [582245805] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:02:34,485 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:02:34,485 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 21:02:34,485 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1223625539] [2024-06-21 21:02:34,485 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:02:34,485 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 21:02:34,485 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:02:34,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 21:02:34,486 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-21 21:02:34,605 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 21:02:34,606 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 185 places, 234 transitions, 2632 flow. Second operand has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:02:34,606 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:02:34,606 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 21:02:34,606 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:02:35,526 INFO L124 PetriNetUnfolderBase]: 2730/4325 cut-off events. [2024-06-21 21:02:35,526 INFO L125 PetriNetUnfolderBase]: For 328521/328523 co-relation queries the response was YES. [2024-06-21 21:02:35,547 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35281 conditions, 4325 events. 2730/4325 cut-off events. For 328521/328523 co-relation queries the response was YES. Maximal size of possible extension queue 222. Compared 24412 event pairs, 652 based on Foata normal form. 18/4340 useless extension candidates. Maximal degree in co-relation 35203. Up to 3788 conditions per place. [2024-06-21 21:02:35,564 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 187 selfloop transitions, 76 changer transitions 0/271 dead transitions. [2024-06-21 21:02:35,564 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 194 places, 271 transitions, 3370 flow [2024-06-21 21:02:35,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 21:02:35,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 21:02:35,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 191 transitions. [2024-06-21 21:02:35,566 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45476190476190476 [2024-06-21 21:02:35,566 INFO L175 Difference]: Start difference. First operand has 185 places, 234 transitions, 2632 flow. Second operand 10 states and 191 transitions. [2024-06-21 21:02:35,566 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 194 places, 271 transitions, 3370 flow [2024-06-21 21:02:35,993 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 186 places, 271 transitions, 3193 flow, removed 14 selfloop flow, removed 8 redundant places. [2024-06-21 21:02:35,996 INFO L231 Difference]: Finished difference. Result has 187 places, 236 transitions, 2688 flow [2024-06-21 21:02:35,996 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2455, PETRI_DIFFERENCE_MINUEND_PLACES=177, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=234, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=158, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2688, PETRI_PLACES=187, PETRI_TRANSITIONS=236} [2024-06-21 21:02:35,996 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 144 predicate places. [2024-06-21 21:02:35,997 INFO L495 AbstractCegarLoop]: Abstraction has has 187 places, 236 transitions, 2688 flow [2024-06-21 21:02:35,997 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:02:35,997 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:02:35,997 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:02:35,997 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-21 21:02:35,997 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)] === [2024-06-21 21:02:35,997 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:02:35,997 INFO L85 PathProgramCache]: Analyzing trace with hash -1371263282, now seen corresponding path program 8 times [2024-06-21 21:02:35,997 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:02:35,997 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1704017416] [2024-06-21 21:02:35,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:02:35,998 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:02:36,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:02:37,290 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:02:37,290 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:02:37,291 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1704017416] [2024-06-21 21:02:37,291 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1704017416] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:02:37,291 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:02:37,291 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 21:02:37,291 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [622694011] [2024-06-21 21:02:37,291 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:02:37,291 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 21:02:37,291 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:02:37,292 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 21:02:37,292 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-21 21:02:37,469 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 21:02:37,469 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 187 places, 236 transitions, 2688 flow. Second operand has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:02:37,470 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:02:37,470 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 21:02:37,470 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:02:38,445 INFO L124 PetriNetUnfolderBase]: 2788/4431 cut-off events. [2024-06-21 21:02:38,445 INFO L125 PetriNetUnfolderBase]: For 344755/344755 co-relation queries the response was YES. [2024-06-21 21:02:38,465 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36288 conditions, 4431 events. 2788/4431 cut-off events. For 344755/344755 co-relation queries the response was YES. Maximal size of possible extension queue 233. Compared 25178 event pairs, 668 based on Foata normal form. 16/4444 useless extension candidates. Maximal degree in co-relation 36209. Up to 3845 conditions per place. [2024-06-21 21:02:38,480 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 174 selfloop transitions, 91 changer transitions 0/273 dead transitions. [2024-06-21 21:02:38,480 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 197 places, 273 transitions, 3439 flow [2024-06-21 21:02:38,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 21:02:38,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 21:02:38,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 205 transitions. [2024-06-21 21:02:38,481 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44372294372294374 [2024-06-21 21:02:38,481 INFO L175 Difference]: Start difference. First operand has 187 places, 236 transitions, 2688 flow. Second operand 11 states and 205 transitions. [2024-06-21 21:02:38,482 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 197 places, 273 transitions, 3439 flow [2024-06-21 21:02:38,805 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 189 places, 273 transitions, 3260 flow, removed 16 selfloop flow, removed 8 redundant places. [2024-06-21 21:02:38,809 INFO L231 Difference]: Finished difference. Result has 191 places, 239 transitions, 2788 flow [2024-06-21 21:02:38,809 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2509, PETRI_DIFFERENCE_MINUEND_PLACES=179, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=236, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=146, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2788, PETRI_PLACES=191, PETRI_TRANSITIONS=239} [2024-06-21 21:02:38,810 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 148 predicate places. [2024-06-21 21:02:38,810 INFO L495 AbstractCegarLoop]: Abstraction has has 191 places, 239 transitions, 2788 flow [2024-06-21 21:02:38,810 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:02:38,810 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:02:38,810 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:02:38,810 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-21 21:02:38,811 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)] === [2024-06-21 21:02:38,811 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:02:38,811 INFO L85 PathProgramCache]: Analyzing trace with hash 1655472492, now seen corresponding path program 9 times [2024-06-21 21:02:38,811 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:02:38,811 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [955480888] [2024-06-21 21:02:38,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:02:38,812 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:02:38,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:02:39,935 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:02:39,936 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:02:39,936 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [955480888] [2024-06-21 21:02:39,936 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [955480888] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:02:39,936 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:02:39,936 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 21:02:39,936 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1440956468] [2024-06-21 21:02:39,936 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:02:39,936 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 21:02:39,937 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:02:39,937 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 21:02:39,937 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-06-21 21:02:40,096 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 21:02:40,096 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 191 places, 239 transitions, 2788 flow. Second operand has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:02:40,096 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:02:40,096 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 21:02:40,096 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:02:41,132 INFO L124 PetriNetUnfolderBase]: 2972/4757 cut-off events. [2024-06-21 21:02:41,132 INFO L125 PetriNetUnfolderBase]: For 373767/373767 co-relation queries the response was YES. [2024-06-21 21:02:41,154 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39413 conditions, 4757 events. 2972/4757 cut-off events. For 373767/373767 co-relation queries the response was YES. Maximal size of possible extension queue 258. Compared 27565 event pairs, 665 based on Foata normal form. 12/4766 useless extension candidates. Maximal degree in co-relation 39332. Up to 2925 conditions per place. [2024-06-21 21:02:41,171 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 135 selfloop transitions, 140 changer transitions 0/283 dead transitions. [2024-06-21 21:02:41,171 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 200 places, 283 transitions, 3894 flow [2024-06-21 21:02:41,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 21:02:41,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 21:02:41,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 196 transitions. [2024-06-21 21:02:41,173 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4666666666666667 [2024-06-21 21:02:41,173 INFO L175 Difference]: Start difference. First operand has 191 places, 239 transitions, 2788 flow. Second operand 10 states and 196 transitions. [2024-06-21 21:02:41,173 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 200 places, 283 transitions, 3894 flow [2024-06-21 21:02:41,658 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 193 places, 283 transitions, 3698 flow, removed 18 selfloop flow, removed 7 redundant places. [2024-06-21 21:02:41,662 INFO L231 Difference]: Finished difference. Result has 195 places, 243 transitions, 3127 flow [2024-06-21 21:02:41,662 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2592, PETRI_DIFFERENCE_MINUEND_PLACES=184, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=239, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=137, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3127, PETRI_PLACES=195, PETRI_TRANSITIONS=243} [2024-06-21 21:02:41,662 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 152 predicate places. [2024-06-21 21:02:41,662 INFO L495 AbstractCegarLoop]: Abstraction has has 195 places, 243 transitions, 3127 flow [2024-06-21 21:02:41,662 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:02:41,663 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:02:41,663 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:02:41,663 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-21 21:02:41,663 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)] === [2024-06-21 21:02:41,663 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:02:41,664 INFO L85 PathProgramCache]: Analyzing trace with hash -1187583210, now seen corresponding path program 10 times [2024-06-21 21:02:41,664 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:02:41,664 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [286176414] [2024-06-21 21:02:41,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:02:41,664 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:02:41,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:02:42,814 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:02:42,815 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:02:42,815 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [286176414] [2024-06-21 21:02:42,815 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [286176414] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:02:42,815 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:02:42,815 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 21:02:42,815 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1104395682] [2024-06-21 21:02:42,815 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:02:42,816 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 21:02:42,816 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:02:42,816 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 21:02:42,816 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-21 21:02:42,979 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 21:02:42,980 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 195 places, 243 transitions, 3127 flow. Second operand has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:02:42,981 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:02:42,981 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 21:02:42,981 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:02:44,013 INFO L124 PetriNetUnfolderBase]: 3020/4845 cut-off events. [2024-06-21 21:02:44,013 INFO L125 PetriNetUnfolderBase]: For 391936/391936 co-relation queries the response was YES. [2024-06-21 21:02:44,038 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40741 conditions, 4845 events. 3020/4845 cut-off events. For 391936/391936 co-relation queries the response was YES. Maximal size of possible extension queue 265. Compared 28303 event pairs, 699 based on Foata normal form. 12/4854 useless extension candidates. Maximal degree in co-relation 40657. Up to 3968 conditions per place. [2024-06-21 21:02:44,055 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 181 selfloop transitions, 92 changer transitions 0/281 dead transitions. [2024-06-21 21:02:44,055 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 204 places, 281 transitions, 3912 flow [2024-06-21 21:02:44,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 21:02:44,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 21:02:44,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 194 transitions. [2024-06-21 21:02:44,056 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46190476190476193 [2024-06-21 21:02:44,057 INFO L175 Difference]: Start difference. First operand has 195 places, 243 transitions, 3127 flow. Second operand 10 states and 194 transitions. [2024-06-21 21:02:44,057 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 204 places, 281 transitions, 3912 flow [2024-06-21 21:02:44,539 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 198 places, 281 transitions, 3715 flow, removed 22 selfloop flow, removed 6 redundant places. [2024-06-21 21:02:44,542 INFO L231 Difference]: Finished difference. Result has 199 places, 244 transitions, 3191 flow [2024-06-21 21:02:44,543 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2930, PETRI_DIFFERENCE_MINUEND_PLACES=189, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=243, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=91, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=151, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3191, PETRI_PLACES=199, PETRI_TRANSITIONS=244} [2024-06-21 21:02:44,543 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 156 predicate places. [2024-06-21 21:02:44,543 INFO L495 AbstractCegarLoop]: Abstraction has has 199 places, 244 transitions, 3191 flow [2024-06-21 21:02:44,543 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:02:44,543 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:02:44,543 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:02:44,543 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-21 21:02:44,543 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)] === [2024-06-21 21:02:44,544 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:02:44,544 INFO L85 PathProgramCache]: Analyzing trace with hash -1026187540, now seen corresponding path program 11 times [2024-06-21 21:02:44,544 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:02:44,544 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [459630915] [2024-06-21 21:02:44,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:02:44,544 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:02:44,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:02:45,702 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:02:45,702 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:02:45,702 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [459630915] [2024-06-21 21:02:45,702 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [459630915] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:02:45,702 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:02:45,702 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 21:02:45,703 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1974722979] [2024-06-21 21:02:45,703 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:02:45,703 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 21:02:45,703 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:02:45,703 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 21:02:45,703 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-06-21 21:02:45,847 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 21:02:45,848 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 199 places, 244 transitions, 3191 flow. Second operand has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:02:45,848 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:02:45,848 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 21:02:45,848 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:02:46,858 INFO L124 PetriNetUnfolderBase]: 3140/5051 cut-off events. [2024-06-21 21:02:46,858 INFO L125 PetriNetUnfolderBase]: For 431625/431625 co-relation queries the response was YES. [2024-06-21 21:02:46,885 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43843 conditions, 5051 events. 3140/5051 cut-off events. For 431625/431625 co-relation queries the response was YES. Maximal size of possible extension queue 284. Compared 30046 event pairs, 773 based on Foata normal form. 12/5060 useless extension candidates. Maximal degree in co-relation 43757. Up to 4195 conditions per place. [2024-06-21 21:02:46,904 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 151 selfloop transitions, 126 changer transitions 0/285 dead transitions. [2024-06-21 21:02:46,904 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 208 places, 285 transitions, 4249 flow [2024-06-21 21:02:46,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 21:02:46,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 21:02:46,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 196 transitions. [2024-06-21 21:02:46,905 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4666666666666667 [2024-06-21 21:02:46,905 INFO L175 Difference]: Start difference. First operand has 199 places, 244 transitions, 3191 flow. Second operand 10 states and 196 transitions. [2024-06-21 21:02:46,905 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 208 places, 285 transitions, 4249 flow [2024-06-21 21:02:47,564 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 201 places, 285 transitions, 4031 flow, removed 24 selfloop flow, removed 7 redundant places. [2024-06-21 21:02:47,568 INFO L231 Difference]: Finished difference. Result has 202 places, 246 transitions, 3375 flow [2024-06-21 21:02:47,568 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2973, PETRI_DIFFERENCE_MINUEND_PLACES=192, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=244, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=125, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=119, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3375, PETRI_PLACES=202, PETRI_TRANSITIONS=246} [2024-06-21 21:02:47,568 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 159 predicate places. [2024-06-21 21:02:47,569 INFO L495 AbstractCegarLoop]: Abstraction has has 202 places, 246 transitions, 3375 flow [2024-06-21 21:02:47,569 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:02:47,569 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:02:47,569 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:02:47,569 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-21 21:02:47,569 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)] === [2024-06-21 21:02:47,569 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:02:47,569 INFO L85 PathProgramCache]: Analyzing trace with hash 1655205582, now seen corresponding path program 12 times [2024-06-21 21:02:47,569 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:02:47,569 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [357761753] [2024-06-21 21:02:47,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:02:47,570 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:02:47,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:02:48,839 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:02:48,839 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:02:48,839 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [357761753] [2024-06-21 21:02:48,839 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [357761753] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:02:48,839 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:02:48,839 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 21:02:48,839 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [338525382] [2024-06-21 21:02:48,839 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:02:48,839 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 21:02:48,840 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:02:48,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 21:02:48,840 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-06-21 21:02:48,974 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 21:02:48,975 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 202 places, 246 transitions, 3375 flow. Second operand has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:02:48,975 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:02:48,975 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 21:02:48,975 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:02:49,991 INFO L124 PetriNetUnfolderBase]: 3112/5007 cut-off events. [2024-06-21 21:02:49,991 INFO L125 PetriNetUnfolderBase]: For 428867/428867 co-relation queries the response was YES. [2024-06-21 21:02:50,019 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42794 conditions, 5007 events. 3112/5007 cut-off events. For 428867/428867 co-relation queries the response was YES. Maximal size of possible extension queue 281. Compared 29747 event pairs, 772 based on Foata normal form. 16/5020 useless extension candidates. Maximal degree in co-relation 42707. Up to 4274 conditions per place. [2024-06-21 21:02:50,040 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 148 selfloop transitions, 124 changer transitions 0/280 dead transitions. [2024-06-21 21:02:50,041 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 211 places, 280 transitions, 4059 flow [2024-06-21 21:02:50,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 21:02:50,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 21:02:50,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 191 transitions. [2024-06-21 21:02:50,042 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45476190476190476 [2024-06-21 21:02:50,042 INFO L175 Difference]: Start difference. First operand has 202 places, 246 transitions, 3375 flow. Second operand 10 states and 191 transitions. [2024-06-21 21:02:50,042 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 211 places, 280 transitions, 4059 flow [2024-06-21 21:02:50,738 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 205 places, 280 transitions, 3825 flow, removed 41 selfloop flow, removed 6 redundant places. [2024-06-21 21:02:50,742 INFO L231 Difference]: Finished difference. Result has 206 places, 246 transitions, 3396 flow [2024-06-21 21:02:50,742 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3141, PETRI_DIFFERENCE_MINUEND_PLACES=196, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=246, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=124, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=122, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3396, PETRI_PLACES=206, PETRI_TRANSITIONS=246} [2024-06-21 21:02:50,742 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 163 predicate places. [2024-06-21 21:02:50,742 INFO L495 AbstractCegarLoop]: Abstraction has has 206 places, 246 transitions, 3396 flow [2024-06-21 21:02:50,743 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:02:50,743 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:02:50,743 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:02:50,743 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-21 21:02:50,743 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)] === [2024-06-21 21:02:50,743 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:02:50,743 INFO L85 PathProgramCache]: Analyzing trace with hash -1177525682, now seen corresponding path program 13 times [2024-06-21 21:02:50,743 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:02:50,743 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1200356031] [2024-06-21 21:02:50,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:02:50,743 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:02:50,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:02:52,145 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:02:52,146 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:02:52,146 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1200356031] [2024-06-21 21:02:52,146 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1200356031] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:02:52,146 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:02:52,146 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 21:02:52,146 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [343659914] [2024-06-21 21:02:52,146 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:02:52,146 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 21:02:52,146 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:02:52,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 21:02:52,147 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-21 21:02:52,272 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 21:02:52,273 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 206 places, 246 transitions, 3396 flow. Second operand has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:02:52,273 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:02:52,273 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 21:02:52,273 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:02:53,390 INFO L124 PetriNetUnfolderBase]: 3228/5205 cut-off events. [2024-06-21 21:02:53,391 INFO L125 PetriNetUnfolderBase]: For 457676/457678 co-relation queries the response was YES. [2024-06-21 21:02:53,416 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44557 conditions, 5205 events. 3228/5205 cut-off events. For 457676/457678 co-relation queries the response was YES. Maximal size of possible extension queue 298. Compared 31338 event pairs, 753 based on Foata normal form. 30/5232 useless extension candidates. Maximal degree in co-relation 44468. Up to 4579 conditions per place. [2024-06-21 21:02:53,434 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 196 selfloop transitions, 80 changer transitions 0/284 dead transitions. [2024-06-21 21:02:53,435 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 215 places, 284 transitions, 4241 flow [2024-06-21 21:02:53,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 21:02:53,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 21:02:53,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 189 transitions. [2024-06-21 21:02:53,436 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45 [2024-06-21 21:02:53,436 INFO L175 Difference]: Start difference. First operand has 206 places, 246 transitions, 3396 flow. Second operand 10 states and 189 transitions. [2024-06-21 21:02:53,436 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 215 places, 284 transitions, 4241 flow [2024-06-21 21:02:54,085 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 206 places, 284 transitions, 3988 flow, removed 1 selfloop flow, removed 9 redundant places. [2024-06-21 21:02:54,088 INFO L231 Difference]: Finished difference. Result has 207 places, 249 transitions, 3468 flow [2024-06-21 21:02:54,088 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3143, PETRI_DIFFERENCE_MINUEND_PLACES=197, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=246, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=77, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=166, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3468, PETRI_PLACES=207, PETRI_TRANSITIONS=249} [2024-06-21 21:02:54,089 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 164 predicate places. [2024-06-21 21:02:54,089 INFO L495 AbstractCegarLoop]: Abstraction has has 207 places, 249 transitions, 3468 flow [2024-06-21 21:02:54,089 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:02:54,089 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:02:54,089 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:02:54,089 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-06-21 21:02:54,089 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)] === [2024-06-21 21:02:54,089 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:02:54,089 INFO L85 PathProgramCache]: Analyzing trace with hash 1398705072, now seen corresponding path program 14 times [2024-06-21 21:02:54,089 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:02:54,090 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [728941058] [2024-06-21 21:02:54,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:02:54,090 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:02:54,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:02:55,380 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:02:55,380 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:02:55,380 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [728941058] [2024-06-21 21:02:55,380 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [728941058] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:02:55,380 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:02:55,380 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 21:02:55,380 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [217282264] [2024-06-21 21:02:55,381 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:02:55,381 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 21:02:55,381 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:02:55,381 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 21:02:55,381 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-21 21:02:55,582 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 21:02:55,583 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 207 places, 249 transitions, 3468 flow. Second operand has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:02:55,583 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:02:55,583 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 21:02:55,583 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:02:56,637 INFO L124 PetriNetUnfolderBase]: 3261/5272 cut-off events. [2024-06-21 21:02:56,637 INFO L125 PetriNetUnfolderBase]: For 461551/461551 co-relation queries the response was YES. [2024-06-21 21:02:56,670 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45102 conditions, 5272 events. 3261/5272 cut-off events. For 461551/461551 co-relation queries the response was YES. Maximal size of possible extension queue 306. Compared 31941 event pairs, 815 based on Foata normal form. 16/5285 useless extension candidates. Maximal degree in co-relation 45012. Up to 4665 conditions per place. [2024-06-21 21:02:56,693 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 184 selfloop transitions, 92 changer transitions 0/284 dead transitions. [2024-06-21 21:02:56,693 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 217 places, 284 transitions, 4235 flow [2024-06-21 21:02:56,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 21:02:56,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 21:02:56,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 204 transitions. [2024-06-21 21:02:56,694 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44155844155844154 [2024-06-21 21:02:56,694 INFO L175 Difference]: Start difference. First operand has 207 places, 249 transitions, 3468 flow. Second operand 11 states and 204 transitions. [2024-06-21 21:02:56,694 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 217 places, 284 transitions, 4235 flow [2024-06-21 21:02:57,552 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 209 places, 284 transitions, 4005 flow, removed 38 selfloop flow, removed 8 redundant places. [2024-06-21 21:02:57,557 INFO L231 Difference]: Finished difference. Result has 210 places, 250 transitions, 3506 flow [2024-06-21 21:02:57,557 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3238, PETRI_DIFFERENCE_MINUEND_PLACES=199, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=249, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=91, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=157, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3506, PETRI_PLACES=210, PETRI_TRANSITIONS=250} [2024-06-21 21:02:57,557 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 167 predicate places. [2024-06-21 21:02:57,557 INFO L495 AbstractCegarLoop]: Abstraction has has 210 places, 250 transitions, 3506 flow [2024-06-21 21:02:57,558 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:02:57,558 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:02:57,558 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:02:57,558 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-06-21 21:02:57,558 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:02:57,559 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:02:57,559 INFO L85 PathProgramCache]: Analyzing trace with hash 1398712512, now seen corresponding path program 15 times [2024-06-21 21:02:57,559 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:02:57,559 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1336279893] [2024-06-21 21:02:57,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:02:57,560 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:02:57,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:02:58,661 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:02:58,662 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:02:58,662 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1336279893] [2024-06-21 21:02:58,662 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1336279893] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:02:58,662 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:02:58,662 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 21:02:58,662 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [998691500] [2024-06-21 21:02:58,662 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:02:58,662 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 21:02:58,663 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:02:58,663 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 21:02:58,663 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-21 21:02:58,932 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 21:02:58,933 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 210 places, 250 transitions, 3506 flow. Second operand has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:02:58,933 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:02:58,933 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 21:02:58,933 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:02:59,960 INFO L124 PetriNetUnfolderBase]: 3248/5247 cut-off events. [2024-06-21 21:02:59,960 INFO L125 PetriNetUnfolderBase]: For 446220/446220 co-relation queries the response was YES. [2024-06-21 21:02:59,993 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43986 conditions, 5247 events. 3248/5247 cut-off events. For 446220/446220 co-relation queries the response was YES. Maximal size of possible extension queue 304. Compared 31702 event pairs, 748 based on Foata normal form. 12/5256 useless extension candidates. Maximal degree in co-relation 43895. Up to 4461 conditions per place. [2024-06-21 21:03:00,015 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 187 selfloop transitions, 92 changer transitions 0/287 dead transitions. [2024-06-21 21:03:00,015 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 219 places, 287 transitions, 4234 flow [2024-06-21 21:03:00,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 21:03:00,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 21:03:00,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 193 transitions. [2024-06-21 21:03:00,016 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4595238095238095 [2024-06-21 21:03:00,016 INFO L175 Difference]: Start difference. First operand has 210 places, 250 transitions, 3506 flow. Second operand 10 states and 193 transitions. [2024-06-21 21:03:00,017 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 219 places, 287 transitions, 4234 flow [2024-06-21 21:03:00,834 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 210 places, 287 transitions, 4011 flow, removed 21 selfloop flow, removed 9 redundant places. [2024-06-21 21:03:00,838 INFO L231 Difference]: Finished difference. Result has 211 places, 250 transitions, 3473 flow [2024-06-21 21:03:00,838 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3283, PETRI_DIFFERENCE_MINUEND_PLACES=201, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=250, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=92, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=158, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3473, PETRI_PLACES=211, PETRI_TRANSITIONS=250} [2024-06-21 21:03:00,838 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 168 predicate places. [2024-06-21 21:03:00,839 INFO L495 AbstractCegarLoop]: Abstraction has has 211 places, 250 transitions, 3473 flow [2024-06-21 21:03:00,839 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:03:00,839 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:03:00,839 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:03:00,839 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-06-21 21:03:00,839 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)] === [2024-06-21 21:03:00,840 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:03:00,840 INFO L85 PathProgramCache]: Analyzing trace with hash 642793182, now seen corresponding path program 2 times [2024-06-21 21:03:00,840 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:03:00,840 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [691641301] [2024-06-21 21:03:00,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:03:00,840 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:03:00,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:03:01,638 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:03:01,639 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:03:01,639 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [691641301] [2024-06-21 21:03:01,639 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [691641301] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:03:01,639 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:03:01,639 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:03:01,639 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1456308179] [2024-06-21 21:03:01,639 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:03:01,639 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:03:01,640 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:03:01,640 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:03:01,640 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:03:01,717 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 21:03:01,718 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 211 places, 250 transitions, 3473 flow. Second operand has 9 states, 9 states have (on average 10.555555555555555) internal successors, (95), 9 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:03:01,718 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:03:01,718 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 21:03:01,718 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:03:02,766 INFO L124 PetriNetUnfolderBase]: 3354/5357 cut-off events. [2024-06-21 21:03:02,766 INFO L125 PetriNetUnfolderBase]: For 439550/439550 co-relation queries the response was YES. [2024-06-21 21:03:02,799 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44558 conditions, 5357 events. 3354/5357 cut-off events. For 439550/439550 co-relation queries the response was YES. Maximal size of possible extension queue 304. Compared 31854 event pairs, 784 based on Foata normal form. 2/5356 useless extension candidates. Maximal degree in co-relation 44466. Up to 5125 conditions per place. [2024-06-21 21:03:02,821 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 228 selfloop transitions, 34 changer transitions 0/266 dead transitions. [2024-06-21 21:03:02,822 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 217 places, 266 transitions, 4209 flow [2024-06-21 21:03:02,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 21:03:02,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 21:03:02,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 122 transitions. [2024-06-21 21:03:02,823 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41496598639455784 [2024-06-21 21:03:02,823 INFO L175 Difference]: Start difference. First operand has 211 places, 250 transitions, 3473 flow. Second operand 7 states and 122 transitions. [2024-06-21 21:03:02,823 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 217 places, 266 transitions, 4209 flow [2024-06-21 21:03:03,619 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 208 places, 266 transitions, 3842 flow, removed 27 selfloop flow, removed 9 redundant places. [2024-06-21 21:03:03,622 INFO L231 Difference]: Finished difference. Result has 209 places, 253 transitions, 3230 flow [2024-06-21 21:03:03,622 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3106, PETRI_DIFFERENCE_MINUEND_PLACES=202, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=250, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=219, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3230, PETRI_PLACES=209, PETRI_TRANSITIONS=253} [2024-06-21 21:03:03,622 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 166 predicate places. [2024-06-21 21:03:03,622 INFO L495 AbstractCegarLoop]: Abstraction has has 209 places, 253 transitions, 3230 flow [2024-06-21 21:03:03,622 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.555555555555555) internal successors, (95), 9 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:03:03,622 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:03:03,623 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:03:03,623 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-06-21 21:03:03,623 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)] === [2024-06-21 21:03:03,623 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:03:03,623 INFO L85 PathProgramCache]: Analyzing trace with hash 1505414524, now seen corresponding path program 3 times [2024-06-21 21:03:03,623 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:03:03,623 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [666886168] [2024-06-21 21:03:03,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:03:03,624 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:03:03,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:03:04,463 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:03:04,463 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:03:04,463 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [666886168] [2024-06-21 21:03:04,463 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [666886168] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:03:04,463 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:03:04,463 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:03:04,463 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [455815750] [2024-06-21 21:03:04,463 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:03:04,463 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:03:04,464 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:03:04,464 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:03:04,464 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:03:04,517 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 21:03:04,518 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 209 places, 253 transitions, 3230 flow. Second operand has 9 states, 9 states have (on average 10.555555555555555) internal successors, (95), 9 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:03:04,518 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:03:04,518 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 21:03:04,518 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:03:05,691 INFO L124 PetriNetUnfolderBase]: 3348/5349 cut-off events. [2024-06-21 21:03:05,691 INFO L125 PetriNetUnfolderBase]: For 435288/435288 co-relation queries the response was YES. [2024-06-21 21:03:05,722 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43593 conditions, 5349 events. 3348/5349 cut-off events. For 435288/435288 co-relation queries the response was YES. Maximal size of possible extension queue 303. Compared 31843 event pairs, 837 based on Foata normal form. 2/5348 useless extension candidates. Maximal degree in co-relation 43501. Up to 5120 conditions per place. [2024-06-21 21:03:05,746 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 228 selfloop transitions, 33 changer transitions 0/265 dead transitions. [2024-06-21 21:03:05,746 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 215 places, 265 transitions, 3800 flow [2024-06-21 21:03:05,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 21:03:05,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 21:03:05,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 122 transitions. [2024-06-21 21:03:05,747 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41496598639455784 [2024-06-21 21:03:05,747 INFO L175 Difference]: Start difference. First operand has 209 places, 253 transitions, 3230 flow. Second operand 7 states and 122 transitions. [2024-06-21 21:03:05,747 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 215 places, 265 transitions, 3800 flow [2024-06-21 21:03:06,435 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 211 places, 265 transitions, 3672 flow, removed 38 selfloop flow, removed 4 redundant places. [2024-06-21 21:03:06,438 INFO L231 Difference]: Finished difference. Result has 212 places, 253 transitions, 3174 flow [2024-06-21 21:03:06,438 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3102, PETRI_DIFFERENCE_MINUEND_PLACES=205, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=253, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=220, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3174, PETRI_PLACES=212, PETRI_TRANSITIONS=253} [2024-06-21 21:03:06,439 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 169 predicate places. [2024-06-21 21:03:06,439 INFO L495 AbstractCegarLoop]: Abstraction has has 212 places, 253 transitions, 3174 flow [2024-06-21 21:03:06,439 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.555555555555555) internal successors, (95), 9 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:03:06,439 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:03:06,439 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:03:06,439 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-06-21 21:03:06,439 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:03:06,440 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:03:06,440 INFO L85 PathProgramCache]: Analyzing trace with hash 2108652464, now seen corresponding path program 16 times [2024-06-21 21:03:06,440 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:03:06,440 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1763414479] [2024-06-21 21:03:06,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:03:06,440 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:03:06,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:03:07,868 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:03:07,869 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:03:07,869 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1763414479] [2024-06-21 21:03:07,869 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1763414479] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:03:07,869 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:03:07,869 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 21:03:07,869 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [542770935] [2024-06-21 21:03:07,869 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:03:07,869 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 21:03:07,869 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:03:07,869 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 21:03:07,870 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-21 21:03:07,990 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 21:03:07,990 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 212 places, 253 transitions, 3174 flow. Second operand has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:03:07,990 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:03:07,990 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 21:03:07,990 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:03:09,167 INFO L124 PetriNetUnfolderBase]: 3358/5435 cut-off events. [2024-06-21 21:03:09,167 INFO L125 PetriNetUnfolderBase]: For 471969/471969 co-relation queries the response was YES. [2024-06-21 21:03:09,198 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43684 conditions, 5435 events. 3358/5435 cut-off events. For 471969/471969 co-relation queries the response was YES. Maximal size of possible extension queue 321. Compared 33217 event pairs, 805 based on Foata normal form. 28/5461 useless extension candidates. Maximal degree in co-relation 43591. Up to 4818 conditions per place. [2024-06-21 21:03:09,218 INFO L140 encePairwiseOnDemand]: 28/42 looper letters, 239 selfloop transitions, 58 changer transitions 0/306 dead transitions. [2024-06-21 21:03:09,218 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 222 places, 306 transitions, 4162 flow [2024-06-21 21:03:09,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 21:03:09,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 21:03:09,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 207 transitions. [2024-06-21 21:03:09,219 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44805194805194803 [2024-06-21 21:03:09,219 INFO L175 Difference]: Start difference. First operand has 212 places, 253 transitions, 3174 flow. Second operand 11 states and 207 transitions. [2024-06-21 21:03:09,220 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 222 places, 306 transitions, 4162 flow [2024-06-21 21:03:09,785 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 215 places, 306 transitions, 4044 flow, removed 11 selfloop flow, removed 7 redundant places. [2024-06-21 21:03:09,788 INFO L231 Difference]: Finished difference. Result has 219 places, 264 transitions, 3470 flow [2024-06-21 21:03:09,789 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3058, PETRI_DIFFERENCE_MINUEND_PLACES=205, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=253, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=195, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3470, PETRI_PLACES=219, PETRI_TRANSITIONS=264} [2024-06-21 21:03:09,789 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 176 predicate places. [2024-06-21 21:03:09,789 INFO L495 AbstractCegarLoop]: Abstraction has has 219 places, 264 transitions, 3470 flow [2024-06-21 21:03:09,789 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:03:09,789 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:03:09,789 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:03:09,789 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2024-06-21 21:03:09,789 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)] === [2024-06-21 21:03:09,790 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:03:09,790 INFO L85 PathProgramCache]: Analyzing trace with hash 1328347360, now seen corresponding path program 1 times [2024-06-21 21:03:09,790 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:03:09,790 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1574959531] [2024-06-21 21:03:09,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:03:09,790 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:03:09,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:03:10,570 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:03:10,570 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:03:10,570 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1574959531] [2024-06-21 21:03:10,570 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1574959531] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:03:10,571 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:03:10,571 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 21:03:10,571 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1680984448] [2024-06-21 21:03:10,571 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:03:10,571 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 21:03:10,571 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:03:10,571 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 21:03:10,571 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-21 21:03:10,717 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-21 21:03:10,717 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 219 places, 264 transitions, 3470 flow. Second operand has 8 states, 8 states have (on average 12.75) internal successors, (102), 8 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:03:10,717 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:03:10,717 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-21 21:03:10,717 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:03:11,651 INFO L124 PetriNetUnfolderBase]: 3159/5215 cut-off events. [2024-06-21 21:03:11,651 INFO L125 PetriNetUnfolderBase]: For 391270/391270 co-relation queries the response was YES. [2024-06-21 21:03:11,680 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41114 conditions, 5215 events. 3159/5215 cut-off events. For 391270/391270 co-relation queries the response was YES. Maximal size of possible extension queue 318. Compared 32597 event pairs, 862 based on Foata normal form. 1/5214 useless extension candidates. Maximal degree in co-relation 41017. Up to 4897 conditions per place. [2024-06-21 21:03:11,698 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 257 selfloop transitions, 15 changer transitions 0/282 dead transitions. [2024-06-21 21:03:11,698 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 225 places, 282 transitions, 4104 flow [2024-06-21 21:03:11,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 21:03:11,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 21:03:11,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 132 transitions. [2024-06-21 21:03:11,699 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4489795918367347 [2024-06-21 21:03:11,700 INFO L175 Difference]: Start difference. First operand has 219 places, 264 transitions, 3470 flow. Second operand 7 states and 132 transitions. [2024-06-21 21:03:11,700 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 225 places, 282 transitions, 4104 flow [2024-06-21 21:03:12,219 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 216 places, 282 transitions, 3928 flow, removed 22 selfloop flow, removed 9 redundant places. [2024-06-21 21:03:12,223 INFO L231 Difference]: Finished difference. Result has 217 places, 267 transitions, 3382 flow [2024-06-21 21:03:12,223 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3294, PETRI_DIFFERENCE_MINUEND_PLACES=210, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=264, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=249, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3382, PETRI_PLACES=217, PETRI_TRANSITIONS=267} [2024-06-21 21:03:12,223 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 174 predicate places. [2024-06-21 21:03:12,224 INFO L495 AbstractCegarLoop]: Abstraction has has 217 places, 267 transitions, 3382 flow [2024-06-21 21:03:12,224 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.75) internal successors, (102), 8 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:03:12,224 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:03:12,224 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:03:12,224 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2024-06-21 21:03:12,224 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)] === [2024-06-21 21:03:12,225 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:03:12,225 INFO L85 PathProgramCache]: Analyzing trace with hash 1328467330, now seen corresponding path program 2 times [2024-06-21 21:03:12,225 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:03:12,225 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [33011669] [2024-06-21 21:03:12,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:03:12,225 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:03:12,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:03:12,931 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:03:12,931 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:03:12,931 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [33011669] [2024-06-21 21:03:12,932 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [33011669] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:03:12,932 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:03:12,932 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 21:03:12,932 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2011336458] [2024-06-21 21:03:12,932 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:03:12,932 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 21:03:12,932 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:03:12,933 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 21:03:12,933 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 21:03:13,012 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-21 21:03:13,013 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 217 places, 267 transitions, 3382 flow. Second operand has 8 states, 8 states have (on average 12.75) internal successors, (102), 8 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:03:13,013 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:03:13,013 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-21 21:03:13,013 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:03:13,791 INFO L124 PetriNetUnfolderBase]: 3164/5222 cut-off events. [2024-06-21 21:03:13,792 INFO L125 PetriNetUnfolderBase]: For 395039/395039 co-relation queries the response was YES. [2024-06-21 21:03:13,824 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41153 conditions, 5222 events. 3164/5222 cut-off events. For 395039/395039 co-relation queries the response was YES. Maximal size of possible extension queue 318. Compared 32686 event pairs, 863 based on Foata normal form. 1/5221 useless extension candidates. Maximal degree in co-relation 41055. Up to 4888 conditions per place. [2024-06-21 21:03:13,844 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 249 selfloop transitions, 27 changer transitions 0/286 dead transitions. [2024-06-21 21:03:13,844 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 223 places, 286 transitions, 4194 flow [2024-06-21 21:03:13,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 21:03:13,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 21:03:13,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 134 transitions. [2024-06-21 21:03:13,845 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4557823129251701 [2024-06-21 21:03:13,845 INFO L175 Difference]: Start difference. First operand has 217 places, 267 transitions, 3382 flow. Second operand 7 states and 134 transitions. [2024-06-21 21:03:13,845 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 223 places, 286 transitions, 4194 flow [2024-06-21 21:03:14,633 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 218 places, 286 transitions, 4128 flow, removed 20 selfloop flow, removed 5 redundant places. [2024-06-21 21:03:14,637 INFO L231 Difference]: Finished difference. Result has 219 places, 273 transitions, 3486 flow [2024-06-21 21:03:14,637 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3316, PETRI_DIFFERENCE_MINUEND_PLACES=212, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=267, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=243, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3486, PETRI_PLACES=219, PETRI_TRANSITIONS=273} [2024-06-21 21:03:14,637 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 176 predicate places. [2024-06-21 21:03:14,637 INFO L495 AbstractCegarLoop]: Abstraction has has 219 places, 273 transitions, 3486 flow [2024-06-21 21:03:14,638 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.75) internal successors, (102), 8 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:03:14,638 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:03:14,638 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:03:14,638 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2024-06-21 21:03:14,638 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)] === [2024-06-21 21:03:14,638 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:03:14,638 INFO L85 PathProgramCache]: Analyzing trace with hash 608643346, now seen corresponding path program 1 times [2024-06-21 21:03:14,639 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:03:14,639 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [307064097] [2024-06-21 21:03:14,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:03:14,639 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:03:14,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:03:15,421 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:03:15,421 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:03:15,421 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [307064097] [2024-06-21 21:03:15,422 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [307064097] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:03:15,422 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:03:15,422 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:03:15,422 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1219600537] [2024-06-21 21:03:15,422 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:03:15,422 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:03:15,422 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:03:15,422 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:03:15,422 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:03:15,499 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 21:03:15,499 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 219 places, 273 transitions, 3486 flow. Second operand has 9 states, 9 states have (on average 11.555555555555555) internal successors, (104), 9 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:03:15,499 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:03:15,499 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 21:03:15,499 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:03:16,390 INFO L124 PetriNetUnfolderBase]: 3272/5332 cut-off events. [2024-06-21 21:03:16,391 INFO L125 PetriNetUnfolderBase]: For 406370/406370 co-relation queries the response was YES. [2024-06-21 21:03:16,425 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42184 conditions, 5332 events. 3272/5332 cut-off events. For 406370/406370 co-relation queries the response was YES. Maximal size of possible extension queue 318. Compared 32780 event pairs, 900 based on Foata normal form. 1/5331 useless extension candidates. Maximal degree in co-relation 42085. Up to 5098 conditions per place. [2024-06-21 21:03:16,446 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 263 selfloop transitions, 24 changer transitions 0/292 dead transitions. [2024-06-21 21:03:16,447 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 225 places, 292 transitions, 4286 flow [2024-06-21 21:03:16,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 21:03:16,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 21:03:16,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 128 transitions. [2024-06-21 21:03:16,447 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43537414965986393 [2024-06-21 21:03:16,448 INFO L175 Difference]: Start difference. First operand has 219 places, 273 transitions, 3486 flow. Second operand 7 states and 128 transitions. [2024-06-21 21:03:16,448 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 225 places, 292 transitions, 4286 flow [2024-06-21 21:03:17,120 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 222 places, 292 transitions, 4221 flow, removed 24 selfloop flow, removed 3 redundant places. [2024-06-21 21:03:17,124 INFO L231 Difference]: Finished difference. Result has 223 places, 279 transitions, 3549 flow [2024-06-21 21:03:17,124 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3421, PETRI_DIFFERENCE_MINUEND_PLACES=216, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=273, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=252, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3549, PETRI_PLACES=223, PETRI_TRANSITIONS=279} [2024-06-21 21:03:17,124 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 180 predicate places. [2024-06-21 21:03:17,125 INFO L495 AbstractCegarLoop]: Abstraction has has 223 places, 279 transitions, 3549 flow [2024-06-21 21:03:17,125 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.555555555555555) internal successors, (104), 9 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:03:17,125 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:03:17,125 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:03:17,125 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2024-06-21 21:03:17,125 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)] === [2024-06-21 21:03:17,125 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:03:17,125 INFO L85 PathProgramCache]: Analyzing trace with hash 1586556760, now seen corresponding path program 3 times [2024-06-21 21:03:17,125 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:03:17,125 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1661042671] [2024-06-21 21:03:17,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:03:17,126 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:03:17,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:03:17,842 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:03:17,842 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:03:17,842 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1661042671] [2024-06-21 21:03:17,842 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1661042671] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:03:17,842 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:03:17,842 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 21:03:17,842 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [663693095] [2024-06-21 21:03:17,842 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:03:17,842 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 21:03:17,843 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:03:17,843 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 21:03:17,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 21:03:17,919 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-21 21:03:17,919 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 223 places, 279 transitions, 3549 flow. Second operand has 8 states, 8 states have (on average 12.75) internal successors, (102), 8 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:03:17,919 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:03:17,919 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-21 21:03:17,919 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:03:18,763 INFO L124 PetriNetUnfolderBase]: 3176/5235 cut-off events. [2024-06-21 21:03:18,763 INFO L125 PetriNetUnfolderBase]: For 416921/416921 co-relation queries the response was YES. [2024-06-21 21:03:18,796 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42031 conditions, 5235 events. 3176/5235 cut-off events. For 416921/416921 co-relation queries the response was YES. Maximal size of possible extension queue 318. Compared 32621 event pairs, 865 based on Foata normal form. 1/5234 useless extension candidates. Maximal degree in co-relation 41930. Up to 4927 conditions per place. [2024-06-21 21:03:18,816 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 261 selfloop transitions, 15 changer transitions 0/288 dead transitions. [2024-06-21 21:03:18,816 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 229 places, 288 transitions, 4125 flow [2024-06-21 21:03:18,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 21:03:18,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 21:03:18,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 126 transitions. [2024-06-21 21:03:18,817 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-21 21:03:18,817 INFO L175 Difference]: Start difference. First operand has 223 places, 279 transitions, 3549 flow. Second operand 7 states and 126 transitions. [2024-06-21 21:03:18,817 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 229 places, 288 transitions, 4125 flow [2024-06-21 21:03:19,440 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 226 places, 288 transitions, 4044 flow, removed 33 selfloop flow, removed 3 redundant places. [2024-06-21 21:03:19,443 INFO L231 Difference]: Finished difference. Result has 227 places, 279 transitions, 3504 flow [2024-06-21 21:03:19,444 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3468, PETRI_DIFFERENCE_MINUEND_PLACES=220, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=279, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=264, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3504, PETRI_PLACES=227, PETRI_TRANSITIONS=279} [2024-06-21 21:03:19,444 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 184 predicate places. [2024-06-21 21:03:19,444 INFO L495 AbstractCegarLoop]: Abstraction has has 227 places, 279 transitions, 3504 flow [2024-06-21 21:03:19,444 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.75) internal successors, (102), 8 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:03:19,444 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:03:19,444 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:03:19,444 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2024-06-21 21:03:19,445 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:03:19,445 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:03:19,445 INFO L85 PathProgramCache]: Analyzing trace with hash 642799134, now seen corresponding path program 2 times [2024-06-21 21:03:19,445 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:03:19,445 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [530224584] [2024-06-21 21:03:19,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:03:19,446 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:03:19,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:03:20,100 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:03:20,101 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:03:20,101 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [530224584] [2024-06-21 21:03:20,101 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [530224584] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:03:20,101 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:03:20,101 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 21:03:20,101 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [205427682] [2024-06-21 21:03:20,102 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:03:20,102 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 21:03:20,102 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:03:20,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 21:03:20,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-21 21:03:20,164 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 21:03:20,164 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 227 places, 279 transitions, 3504 flow. Second operand has 8 states, 8 states have (on average 11.75) internal successors, (94), 8 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:03:20,164 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:03:20,164 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 21:03:20,164 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:03:21,096 INFO L124 PetriNetUnfolderBase]: 3274/5335 cut-off events. [2024-06-21 21:03:21,096 INFO L125 PetriNetUnfolderBase]: For 426771/426771 co-relation queries the response was YES. [2024-06-21 21:03:21,129 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42764 conditions, 5335 events. 3274/5335 cut-off events. For 426771/426771 co-relation queries the response was YES. Maximal size of possible extension queue 318. Compared 32754 event pairs, 898 based on Foata normal form. 1/5334 useless extension candidates. Maximal degree in co-relation 42661. Up to 5122 conditions per place. [2024-06-21 21:03:21,150 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 271 selfloop transitions, 15 changer transitions 0/291 dead transitions. [2024-06-21 21:03:21,151 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 233 places, 291 transitions, 4138 flow [2024-06-21 21:03:21,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 21:03:21,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 21:03:21,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 120 transitions. [2024-06-21 21:03:21,152 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40816326530612246 [2024-06-21 21:03:21,152 INFO L175 Difference]: Start difference. First operand has 227 places, 279 transitions, 3504 flow. Second operand 7 states and 120 transitions. [2024-06-21 21:03:21,152 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 233 places, 291 transitions, 4138 flow [2024-06-21 21:03:21,753 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 227 places, 291 transitions, 4092 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-06-21 21:03:21,757 INFO L231 Difference]: Finished difference. Result has 228 places, 282 transitions, 3538 flow [2024-06-21 21:03:21,757 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3458, PETRI_DIFFERENCE_MINUEND_PLACES=221, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=279, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=264, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3538, PETRI_PLACES=228, PETRI_TRANSITIONS=282} [2024-06-21 21:03:21,757 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 185 predicate places. [2024-06-21 21:03:21,758 INFO L495 AbstractCegarLoop]: Abstraction has has 228 places, 282 transitions, 3538 flow [2024-06-21 21:03:21,758 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.75) internal successors, (94), 8 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:03:21,758 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:03:21,758 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:03:21,758 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2024-06-21 21:03:21,758 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:03:21,759 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:03:21,759 INFO L85 PathProgramCache]: Analyzing trace with hash 1505599036, now seen corresponding path program 3 times [2024-06-21 21:03:21,759 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:03:21,759 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1462075618] [2024-06-21 21:03:21,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:03:21,759 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:03:21,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:03:22,533 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:03:22,534 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:03:22,534 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1462075618] [2024-06-21 21:03:22,534 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1462075618] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:03:22,534 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:03:22,534 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 21:03:22,534 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [977798916] [2024-06-21 21:03:22,534 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:03:22,534 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 21:03:22,534 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:03:22,535 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 21:03:22,535 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 21:03:22,596 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 21:03:22,597 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 228 places, 282 transitions, 3538 flow. Second operand has 8 states, 8 states have (on average 11.75) internal successors, (94), 8 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:03:22,597 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:03:22,597 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 21:03:22,597 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:03:23,531 INFO L124 PetriNetUnfolderBase]: 3271/5331 cut-off events. [2024-06-21 21:03:23,531 INFO L125 PetriNetUnfolderBase]: For 435740/435740 co-relation queries the response was YES. [2024-06-21 21:03:23,563 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42852 conditions, 5331 events. 3271/5331 cut-off events. For 435740/435740 co-relation queries the response was YES. Maximal size of possible extension queue 318. Compared 32756 event pairs, 898 based on Foata normal form. 1/5330 useless extension candidates. Maximal degree in co-relation 42748. Up to 5112 conditions per place. [2024-06-21 21:03:23,582 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 266 selfloop transitions, 20 changer transitions 0/291 dead transitions. [2024-06-21 21:03:23,582 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 234 places, 291 transitions, 4134 flow [2024-06-21 21:03:23,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 21:03:23,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 21:03:23,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 122 transitions. [2024-06-21 21:03:23,583 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41496598639455784 [2024-06-21 21:03:23,583 INFO L175 Difference]: Start difference. First operand has 228 places, 282 transitions, 3538 flow. Second operand 7 states and 122 transitions. [2024-06-21 21:03:23,583 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 234 places, 291 transitions, 4134 flow [2024-06-21 21:03:24,153 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 229 places, 291 transitions, 4066 flow, removed 21 selfloop flow, removed 5 redundant places. [2024-06-21 21:03:24,156 INFO L231 Difference]: Finished difference. Result has 230 places, 282 transitions, 3516 flow [2024-06-21 21:03:24,157 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3470, PETRI_DIFFERENCE_MINUEND_PLACES=223, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=282, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=262, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3516, PETRI_PLACES=230, PETRI_TRANSITIONS=282} [2024-06-21 21:03:24,157 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 187 predicate places. [2024-06-21 21:03:24,157 INFO L495 AbstractCegarLoop]: Abstraction has has 230 places, 282 transitions, 3516 flow [2024-06-21 21:03:24,157 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.75) internal successors, (94), 8 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:03:24,157 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:03:24,157 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:03:24,157 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2024-06-21 21:03:24,157 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)] === [2024-06-21 21:03:24,158 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:03:24,158 INFO L85 PathProgramCache]: Analyzing trace with hash 1284954295, now seen corresponding path program 1 times [2024-06-21 21:03:24,158 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:03:24,158 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1033193581] [2024-06-21 21:03:24,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:03:24,158 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:03:24,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:03:25,616 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:03:25,616 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:03:25,616 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1033193581] [2024-06-21 21:03:25,617 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1033193581] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:03:25,617 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:03:25,617 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 21:03:25,617 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1618505880] [2024-06-21 21:03:25,617 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:03:25,617 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 21:03:25,617 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:03:25,617 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 21:03:25,617 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-21 21:03:25,779 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 21:03:25,780 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 230 places, 282 transitions, 3516 flow. Second operand has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:03:25,780 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:03:25,780 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 21:03:25,780 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:03:27,071 INFO L124 PetriNetUnfolderBase]: 3447/5570 cut-off events. [2024-06-21 21:03:27,071 INFO L125 PetriNetUnfolderBase]: For 542640/542640 co-relation queries the response was YES. [2024-06-21 21:03:27,109 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46525 conditions, 5570 events. 3447/5570 cut-off events. For 542640/542640 co-relation queries the response was YES. Maximal size of possible extension queue 329. Compared 34154 event pairs, 706 based on Foata normal form. 12/5580 useless extension candidates. Maximal degree in co-relation 46420. Up to 5144 conditions per place. [2024-06-21 21:03:27,132 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 282 selfloop transitions, 31 changer transitions 0/325 dead transitions. [2024-06-21 21:03:27,132 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 239 places, 325 transitions, 4360 flow [2024-06-21 21:03:27,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 21:03:27,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 21:03:27,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 190 transitions. [2024-06-21 21:03:27,137 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4523809523809524 [2024-06-21 21:03:27,137 INFO L175 Difference]: Start difference. First operand has 230 places, 282 transitions, 3516 flow. Second operand 10 states and 190 transitions. [2024-06-21 21:03:27,137 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 239 places, 325 transitions, 4360 flow [2024-06-21 21:03:27,860 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 233 places, 325 transitions, 4294 flow, removed 8 selfloop flow, removed 6 redundant places. [2024-06-21 21:03:27,863 INFO L231 Difference]: Finished difference. Result has 235 places, 286 transitions, 3615 flow [2024-06-21 21:03:27,863 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3450, PETRI_DIFFERENCE_MINUEND_PLACES=224, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=282, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=253, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3615, PETRI_PLACES=235, PETRI_TRANSITIONS=286} [2024-06-21 21:03:27,864 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 192 predicate places. [2024-06-21 21:03:27,864 INFO L495 AbstractCegarLoop]: Abstraction has has 235 places, 286 transitions, 3615 flow [2024-06-21 21:03:27,864 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:03:27,864 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:03:27,864 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:03:27,864 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2024-06-21 21:03:27,864 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)] === [2024-06-21 21:03:27,864 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:03:27,864 INFO L85 PathProgramCache]: Analyzing trace with hash 1289538265, now seen corresponding path program 2 times [2024-06-21 21:03:27,865 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:03:27,865 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [139045858] [2024-06-21 21:03:27,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:03:27,865 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:03:27,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:03:29,133 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:03:29,133 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:03:29,133 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [139045858] [2024-06-21 21:03:29,133 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [139045858] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:03:29,133 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:03:29,133 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 21:03:29,133 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1450425412] [2024-06-21 21:03:29,134 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:03:29,134 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 21:03:29,134 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:03:29,134 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 21:03:29,134 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-21 21:03:29,320 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 21:03:29,320 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 235 places, 286 transitions, 3615 flow. Second operand has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:03:29,320 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:03:29,320 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 21:03:29,320 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:03:30,507 INFO L124 PetriNetUnfolderBase]: 3488/5641 cut-off events. [2024-06-21 21:03:30,507 INFO L125 PetriNetUnfolderBase]: For 558600/558600 co-relation queries the response was YES. [2024-06-21 21:03:30,545 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47679 conditions, 5641 events. 3488/5641 cut-off events. For 558600/558600 co-relation queries the response was YES. Maximal size of possible extension queue 335. Compared 34684 event pairs, 781 based on Foata normal form. 12/5651 useless extension candidates. Maximal degree in co-relation 47572. Up to 5256 conditions per place. [2024-06-21 21:03:30,568 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 285 selfloop transitions, 29 changer transitions 0/326 dead transitions. [2024-06-21 21:03:30,568 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 244 places, 326 transitions, 4452 flow [2024-06-21 21:03:30,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 21:03:30,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 21:03:30,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 188 transitions. [2024-06-21 21:03:30,569 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44761904761904764 [2024-06-21 21:03:30,569 INFO L175 Difference]: Start difference. First operand has 235 places, 286 transitions, 3615 flow. Second operand 10 states and 188 transitions. [2024-06-21 21:03:30,569 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 244 places, 326 transitions, 4452 flow [2024-06-21 21:03:31,898 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 237 places, 326 transitions, 4334 flow, removed 29 selfloop flow, removed 7 redundant places. [2024-06-21 21:03:31,902 INFO L231 Difference]: Finished difference. Result has 239 places, 288 transitions, 3649 flow [2024-06-21 21:03:31,902 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3499, PETRI_DIFFERENCE_MINUEND_PLACES=228, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=286, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=257, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3649, PETRI_PLACES=239, PETRI_TRANSITIONS=288} [2024-06-21 21:03:31,902 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 196 predicate places. [2024-06-21 21:03:31,903 INFO L495 AbstractCegarLoop]: Abstraction has has 239 places, 288 transitions, 3649 flow [2024-06-21 21:03:31,903 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:03:31,903 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:03:31,903 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:03:31,903 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2024-06-21 21:03:31,903 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)] === [2024-06-21 21:03:31,903 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:03:31,903 INFO L85 PathProgramCache]: Analyzing trace with hash 427938863, now seen corresponding path program 3 times [2024-06-21 21:03:31,903 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:03:31,903 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1946745036] [2024-06-21 21:03:31,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:03:31,904 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:03:31,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:03:33,207 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:03:33,207 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:03:33,207 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1946745036] [2024-06-21 21:03:33,207 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1946745036] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:03:33,207 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:03:33,207 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 21:03:33,207 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [706505996] [2024-06-21 21:03:33,207 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:03:33,208 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 21:03:33,208 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:03:33,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 21:03:33,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-21 21:03:33,380 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 21:03:33,380 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 239 places, 288 transitions, 3649 flow. Second operand has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:03:33,381 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:03:33,381 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 21:03:33,381 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:03:34,588 INFO L124 PetriNetUnfolderBase]: 3528/5707 cut-off events. [2024-06-21 21:03:34,588 INFO L125 PetriNetUnfolderBase]: For 580293/580303 co-relation queries the response was YES. [2024-06-21 21:03:34,628 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48270 conditions, 5707 events. 3528/5707 cut-off events. For 580293/580303 co-relation queries the response was YES. Maximal size of possible extension queue 341. Compared 35136 event pairs, 667 based on Foata normal form. 12/5713 useless extension candidates. Maximal degree in co-relation 48161. Up to 5286 conditions per place. [2024-06-21 21:03:34,650 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 292 selfloop transitions, 27 changer transitions 0/331 dead transitions. [2024-06-21 21:03:34,650 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 248 places, 331 transitions, 4509 flow [2024-06-21 21:03:34,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 21:03:34,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 21:03:34,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 188 transitions. [2024-06-21 21:03:34,651 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44761904761904764 [2024-06-21 21:03:34,652 INFO L175 Difference]: Start difference. First operand has 239 places, 288 transitions, 3649 flow. Second operand 10 states and 188 transitions. [2024-06-21 21:03:34,652 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 248 places, 331 transitions, 4509 flow [2024-06-21 21:03:35,768 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 241 places, 331 transitions, 4402 flow, removed 27 selfloop flow, removed 7 redundant places. [2024-06-21 21:03:35,772 INFO L231 Difference]: Finished difference. Result has 243 places, 291 transitions, 3699 flow [2024-06-21 21:03:35,772 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3542, PETRI_DIFFERENCE_MINUEND_PLACES=232, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=288, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=262, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3699, PETRI_PLACES=243, PETRI_TRANSITIONS=291} [2024-06-21 21:03:35,772 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 200 predicate places. [2024-06-21 21:03:35,773 INFO L495 AbstractCegarLoop]: Abstraction has has 243 places, 291 transitions, 3699 flow [2024-06-21 21:03:35,773 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:03:35,773 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:03:35,773 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:03:35,773 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2024-06-21 21:03:35,773 INFO L420 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:03:35,774 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:03:35,774 INFO L85 PathProgramCache]: Analyzing trace with hash -1995825199, now seen corresponding path program 4 times [2024-06-21 21:03:35,774 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:03:35,774 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [332265130] [2024-06-21 21:03:35,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:03:35,774 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:03:35,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:03:37,002 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:03:37,002 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:03:37,002 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [332265130] [2024-06-21 21:03:37,002 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [332265130] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:03:37,002 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:03:37,002 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 21:03:37,002 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1118962990] [2024-06-21 21:03:37,003 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:03:37,003 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 21:03:37,003 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:03:37,003 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 21:03:37,003 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-21 21:03:37,136 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 21:03:37,136 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 243 places, 291 transitions, 3699 flow. Second operand has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:03:37,136 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:03:37,136 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 21:03:37,136 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:03:38,453 INFO L124 PetriNetUnfolderBase]: 3570/5783 cut-off events. [2024-06-21 21:03:38,454 INFO L125 PetriNetUnfolderBase]: For 599403/599403 co-relation queries the response was YES. [2024-06-21 21:03:38,492 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49064 conditions, 5783 events. 3570/5783 cut-off events. For 599403/599403 co-relation queries the response was YES. Maximal size of possible extension queue 348. Compared 35823 event pairs, 788 based on Foata normal form. 12/5793 useless extension candidates. Maximal degree in co-relation 48953. Up to 5222 conditions per place. [2024-06-21 21:03:38,514 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 255 selfloop transitions, 65 changer transitions 0/332 dead transitions. [2024-06-21 21:03:38,514 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 252 places, 332 transitions, 4567 flow [2024-06-21 21:03:38,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 21:03:38,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 21:03:38,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 188 transitions. [2024-06-21 21:03:38,515 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44761904761904764 [2024-06-21 21:03:38,515 INFO L175 Difference]: Start difference. First operand has 243 places, 291 transitions, 3699 flow. Second operand 10 states and 188 transitions. [2024-06-21 21:03:38,515 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 252 places, 332 transitions, 4567 flow [2024-06-21 21:03:39,668 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 245 places, 332 transitions, 4453 flow, removed 32 selfloop flow, removed 7 redundant places. [2024-06-21 21:03:39,671 INFO L231 Difference]: Finished difference. Result has 247 places, 295 transitions, 3845 flow [2024-06-21 21:03:39,672 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3585, PETRI_DIFFERENCE_MINUEND_PLACES=236, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=291, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=228, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3845, PETRI_PLACES=247, PETRI_TRANSITIONS=295} [2024-06-21 21:03:39,672 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 204 predicate places. [2024-06-21 21:03:39,672 INFO L495 AbstractCegarLoop]: Abstraction has has 247 places, 295 transitions, 3845 flow [2024-06-21 21:03:39,672 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:03:39,672 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:03:39,672 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:03:39,672 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2024-06-21 21:03:39,672 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)] === [2024-06-21 21:03:39,673 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:03:39,673 INFO L85 PathProgramCache]: Analyzing trace with hash 1692711099, now seen corresponding path program 1 times [2024-06-21 21:03:39,673 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:03:39,673 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [991138604] [2024-06-21 21:03:39,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:03:39,673 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:03:39,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:03:40,408 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:03:40,408 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:03:40,408 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [991138604] [2024-06-21 21:03:40,408 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [991138604] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:03:40,408 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:03:40,408 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:03:40,408 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2013159450] [2024-06-21 21:03:40,409 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:03:40,409 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:03:40,409 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:03:40,409 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:03:40,409 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:03:40,495 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 21:03:40,496 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 247 places, 295 transitions, 3845 flow. Second operand has 9 states, 9 states have (on average 11.555555555555555) internal successors, (104), 9 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:03:40,496 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:03:40,496 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 21:03:40,496 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:03:41,658 INFO L124 PetriNetUnfolderBase]: 3596/5821 cut-off events. [2024-06-21 21:03:41,658 INFO L125 PetriNetUnfolderBase]: For 597183/597183 co-relation queries the response was YES. [2024-06-21 21:03:41,696 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49679 conditions, 5821 events. 3596/5821 cut-off events. For 597183/597183 co-relation queries the response was YES. Maximal size of possible extension queue 350. Compared 36079 event pairs, 825 based on Foata normal form. 2/5821 useless extension candidates. Maximal degree in co-relation 49566. Up to 5477 conditions per place. [2024-06-21 21:03:41,716 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 275 selfloop transitions, 39 changer transitions 0/326 dead transitions. [2024-06-21 21:03:41,716 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 253 places, 326 transitions, 4817 flow [2024-06-21 21:03:41,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 21:03:41,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 21:03:41,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 135 transitions. [2024-06-21 21:03:41,717 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45918367346938777 [2024-06-21 21:03:41,717 INFO L175 Difference]: Start difference. First operand has 247 places, 295 transitions, 3845 flow. Second operand 7 states and 135 transitions. [2024-06-21 21:03:41,717 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 253 places, 326 transitions, 4817 flow [2024-06-21 21:03:42,694 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 246 places, 326 transitions, 4617 flow, removed 37 selfloop flow, removed 7 redundant places. [2024-06-21 21:03:42,698 INFO L231 Difference]: Finished difference. Result has 248 places, 306 transitions, 3903 flow [2024-06-21 21:03:42,698 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3645, PETRI_DIFFERENCE_MINUEND_PLACES=240, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=295, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=259, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3903, PETRI_PLACES=248, PETRI_TRANSITIONS=306} [2024-06-21 21:03:42,698 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 205 predicate places. [2024-06-21 21:03:42,698 INFO L495 AbstractCegarLoop]: Abstraction has has 248 places, 306 transitions, 3903 flow [2024-06-21 21:03:42,698 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.555555555555555) internal successors, (104), 9 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:03:42,698 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:03:42,698 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:03:42,698 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2024-06-21 21:03:42,699 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)] === [2024-06-21 21:03:42,699 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:03:42,699 INFO L85 PathProgramCache]: Analyzing trace with hash -1932038855, now seen corresponding path program 2 times [2024-06-21 21:03:42,699 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:03:42,699 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [946666253] [2024-06-21 21:03:42,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:03:42,699 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:03:42,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:03:43,446 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:03:43,447 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:03:43,447 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [946666253] [2024-06-21 21:03:43,447 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [946666253] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:03:43,447 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:03:43,447 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:03:43,447 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1686937549] [2024-06-21 21:03:43,447 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:03:43,447 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:03:43,447 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:03:43,448 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:03:43,448 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:03:43,514 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 21:03:43,514 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 248 places, 306 transitions, 3903 flow. Second operand has 9 states, 9 states have (on average 11.555555555555555) internal successors, (104), 9 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:03:43,514 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:03:43,514 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 21:03:43,514 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:03:44,654 INFO L124 PetriNetUnfolderBase]: 3611/5844 cut-off events. [2024-06-21 21:03:44,654 INFO L125 PetriNetUnfolderBase]: For 608974/608974 co-relation queries the response was YES. [2024-06-21 21:03:44,697 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50166 conditions, 5844 events. 3611/5844 cut-off events. For 608974/608974 co-relation queries the response was YES. Maximal size of possible extension queue 352. Compared 36270 event pairs, 827 based on Foata normal form. 2/5843 useless extension candidates. Maximal degree in co-relation 50051. Up to 5564 conditions per place. [2024-06-21 21:03:44,721 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 284 selfloop transitions, 30 changer transitions 0/326 dead transitions. [2024-06-21 21:03:44,721 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 255 places, 326 transitions, 4674 flow [2024-06-21 21:03:44,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:03:44,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:03:44,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 140 transitions. [2024-06-21 21:03:44,722 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4166666666666667 [2024-06-21 21:03:44,722 INFO L175 Difference]: Start difference. First operand has 248 places, 306 transitions, 3903 flow. Second operand 8 states and 140 transitions. [2024-06-21 21:03:44,722 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 255 places, 326 transitions, 4674 flow [2024-06-21 21:03:46,088 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 253 places, 326 transitions, 4573 flow, removed 46 selfloop flow, removed 2 redundant places. [2024-06-21 21:03:46,092 INFO L231 Difference]: Finished difference. Result has 254 places, 313 transitions, 3973 flow [2024-06-21 21:03:46,092 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3826, PETRI_DIFFERENCE_MINUEND_PLACES=246, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=306, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=280, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3973, PETRI_PLACES=254, PETRI_TRANSITIONS=313} [2024-06-21 21:03:46,092 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 211 predicate places. [2024-06-21 21:03:46,093 INFO L495 AbstractCegarLoop]: Abstraction has has 254 places, 313 transitions, 3973 flow [2024-06-21 21:03:46,093 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.555555555555555) internal successors, (104), 9 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:03:46,093 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:03:46,093 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:03:46,093 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2024-06-21 21:03:46,093 INFO L420 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:03:46,094 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:03:46,094 INFO L85 PathProgramCache]: Analyzing trace with hash 1698432955, now seen corresponding path program 1 times [2024-06-21 21:03:46,094 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:03:46,094 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1331168049] [2024-06-21 21:03:46,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:03:46,094 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:03:46,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:03:46,956 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:03:46,956 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:03:46,956 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1331168049] [2024-06-21 21:03:46,956 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1331168049] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:03:46,956 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:03:46,956 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:03:46,956 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [192880212] [2024-06-21 21:03:46,956 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:03:46,957 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:03:46,957 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:03:46,957 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:03:46,957 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:03:47,031 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 21:03:47,031 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 254 places, 313 transitions, 3973 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:03:47,032 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:03:47,032 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 21:03:47,032 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:03:48,339 INFO L124 PetriNetUnfolderBase]: 3707/5944 cut-off events. [2024-06-21 21:03:48,339 INFO L125 PetriNetUnfolderBase]: For 622377/622377 co-relation queries the response was YES. [2024-06-21 21:03:48,382 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50930 conditions, 5944 events. 3707/5944 cut-off events. For 622377/622377 co-relation queries the response was YES. Maximal size of possible extension queue 352. Compared 36430 event pairs, 851 based on Foata normal form. 2/5944 useless extension candidates. Maximal degree in co-relation 50813. Up to 5677 conditions per place. [2024-06-21 21:03:48,405 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 292 selfloop transitions, 45 changer transitions 0/341 dead transitions. [2024-06-21 21:03:48,406 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 261 places, 341 transitions, 4969 flow [2024-06-21 21:03:48,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:03:48,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:03:48,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 144 transitions. [2024-06-21 21:03:48,406 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-21 21:03:48,406 INFO L175 Difference]: Start difference. First operand has 254 places, 313 transitions, 3973 flow. Second operand 8 states and 144 transitions. [2024-06-21 21:03:48,406 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 261 places, 341 transitions, 4969 flow [2024-06-21 21:03:49,354 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 258 places, 341 transitions, 4911 flow, removed 15 selfloop flow, removed 3 redundant places. [2024-06-21 21:03:49,358 INFO L231 Difference]: Finished difference. Result has 260 places, 322 transitions, 4138 flow [2024-06-21 21:03:49,358 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3915, PETRI_DIFFERENCE_MINUEND_PLACES=251, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=313, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=272, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4138, PETRI_PLACES=260, PETRI_TRANSITIONS=322} [2024-06-21 21:03:49,359 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 217 predicate places. [2024-06-21 21:03:49,359 INFO L495 AbstractCegarLoop]: Abstraction has has 260 places, 322 transitions, 4138 flow [2024-06-21 21:03:49,359 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:03:49,359 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:03:49,359 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:03:49,359 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2024-06-21 21:03:49,360 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)] === [2024-06-21 21:03:49,360 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:03:49,360 INFO L85 PathProgramCache]: Analyzing trace with hash -1255784829, now seen corresponding path program 5 times [2024-06-21 21:03:49,360 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:03:49,360 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1764276194] [2024-06-21 21:03:49,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:03:49,361 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:03:49,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:03:50,701 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:03:50,704 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:03:50,704 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1764276194] [2024-06-21 21:03:50,704 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1764276194] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:03:50,704 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:03:50,704 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 21:03:50,704 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [110467580] [2024-06-21 21:03:50,705 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:03:50,705 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 21:03:50,705 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:03:50,705 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 21:03:50,706 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-06-21 21:03:50,852 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 21:03:50,853 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 260 places, 322 transitions, 4138 flow. Second operand has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:03:50,853 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:03:50,853 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 21:03:50,853 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:03:52,106 INFO L124 PetriNetUnfolderBase]: 3597/5824 cut-off events. [2024-06-21 21:03:52,106 INFO L125 PetriNetUnfolderBase]: For 637628/637630 co-relation queries the response was YES. [2024-06-21 21:03:52,155 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50028 conditions, 5824 events. 3597/5824 cut-off events. For 637628/637630 co-relation queries the response was YES. Maximal size of possible extension queue 350. Compared 36080 event pairs, 778 based on Foata normal form. 14/5834 useless extension candidates. Maximal degree in co-relation 49909. Up to 5202 conditions per place. [2024-06-21 21:03:52,181 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 267 selfloop transitions, 80 changer transitions 0/359 dead transitions. [2024-06-21 21:03:52,181 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 268 places, 359 transitions, 4872 flow [2024-06-21 21:03:52,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 21:03:52,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 21:03:52,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 188 transitions. [2024-06-21 21:03:52,182 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44761904761904764 [2024-06-21 21:03:52,182 INFO L175 Difference]: Start difference. First operand has 260 places, 322 transitions, 4138 flow. Second operand 10 states and 188 transitions. [2024-06-21 21:03:52,182 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 268 places, 359 transitions, 4872 flow [2024-06-21 21:03:53,228 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 265 places, 359 transitions, 4811 flow, removed 21 selfloop flow, removed 3 redundant places. [2024-06-21 21:03:53,232 INFO L231 Difference]: Finished difference. Result has 267 places, 324 transitions, 4175 flow [2024-06-21 21:03:53,232 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3969, PETRI_DIFFERENCE_MINUEND_PLACES=256, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=321, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=77, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=243, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4175, PETRI_PLACES=267, PETRI_TRANSITIONS=324} [2024-06-21 21:03:53,233 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 224 predicate places. [2024-06-21 21:03:53,233 INFO L495 AbstractCegarLoop]: Abstraction has has 267 places, 324 transitions, 4175 flow [2024-06-21 21:03:53,233 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:03:53,233 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:03:53,233 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:03:53,233 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2024-06-21 21:03:53,233 INFO L420 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:03:53,233 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:03:53,233 INFO L85 PathProgramCache]: Analyzing trace with hash 1464128189, now seen corresponding path program 3 times [2024-06-21 21:03:53,233 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:03:53,234 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1319715624] [2024-06-21 21:03:53,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:03:53,234 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:03:53,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:03:54,023 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:03:54,023 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:03:54,023 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1319715624] [2024-06-21 21:03:54,023 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1319715624] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:03:54,023 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:03:54,023 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:03:54,023 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [564283654] [2024-06-21 21:03:54,023 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:03:54,024 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:03:54,024 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:03:54,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:03:54,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:03:54,089 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 21:03:54,089 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 267 places, 324 transitions, 4175 flow. Second operand has 9 states, 9 states have (on average 11.555555555555555) internal successors, (104), 9 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:03:54,089 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:03:54,089 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 21:03:54,089 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:03:55,185 INFO L124 PetriNetUnfolderBase]: 3615/5851 cut-off events. [2024-06-21 21:03:55,185 INFO L125 PetriNetUnfolderBase]: For 639382/639384 co-relation queries the response was YES. [2024-06-21 21:03:55,230 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50954 conditions, 5851 events. 3615/5851 cut-off events. For 639382/639384 co-relation queries the response was YES. Maximal size of possible extension queue 352. Compared 36283 event pairs, 818 based on Foata normal form. 4/5851 useless extension candidates. Maximal degree in co-relation 50831. Up to 5442 conditions per place. [2024-06-21 21:03:55,254 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 282 selfloop transitions, 56 changer transitions 0/350 dead transitions. [2024-06-21 21:03:55,254 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 273 places, 350 transitions, 5345 flow [2024-06-21 21:03:55,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 21:03:55,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 21:03:55,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 135 transitions. [2024-06-21 21:03:55,255 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45918367346938777 [2024-06-21 21:03:55,255 INFO L175 Difference]: Start difference. First operand has 267 places, 324 transitions, 4175 flow. Second operand 7 states and 135 transitions. [2024-06-21 21:03:55,255 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 273 places, 350 transitions, 5345 flow [2024-06-21 21:03:56,357 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 266 places, 350 transitions, 5109 flow, removed 40 selfloop flow, removed 7 redundant places. [2024-06-21 21:03:56,361 INFO L231 Difference]: Finished difference. Result has 267 places, 330 transitions, 4188 flow [2024-06-21 21:03:56,362 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3939, PETRI_DIFFERENCE_MINUEND_PLACES=260, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=324, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=271, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4188, PETRI_PLACES=267, PETRI_TRANSITIONS=330} [2024-06-21 21:03:56,362 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 224 predicate places. [2024-06-21 21:03:56,362 INFO L495 AbstractCegarLoop]: Abstraction has has 267 places, 330 transitions, 4188 flow [2024-06-21 21:03:56,362 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.555555555555555) internal successors, (104), 9 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:03:56,362 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:03:56,362 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:03:56,362 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2024-06-21 21:03:56,362 INFO L420 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 21:03:56,363 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:03:56,363 INFO L85 PathProgramCache]: Analyzing trace with hash 1688062533, now seen corresponding path program 4 times [2024-06-21 21:03:56,363 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:03:56,363 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [471834728] [2024-06-21 21:03:56,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:03:56,363 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:03:56,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:03:57,154 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:03:57,154 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:03:57,154 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [471834728] [2024-06-21 21:03:57,154 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [471834728] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:03:57,154 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:03:57,155 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 21:03:57,155 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2018202475] [2024-06-21 21:03:57,155 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:03:57,155 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 21:03:57,155 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:03:57,155 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 21:03:57,156 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 21:03:57,210 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 21:03:57,211 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 267 places, 330 transitions, 4188 flow. Second operand has 8 states, 8 states have (on average 11.75) internal successors, (94), 8 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:03:57,211 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:03:57,211 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 21:03:57,211 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:03:58,443 INFO L124 PetriNetUnfolderBase]: 3629/5873 cut-off events. [2024-06-21 21:03:58,443 INFO L125 PetriNetUnfolderBase]: For 651121/651123 co-relation queries the response was YES. [2024-06-21 21:03:58,488 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51216 conditions, 5873 events. 3629/5873 cut-off events. For 651121/651123 co-relation queries the response was YES. Maximal size of possible extension queue 355. Compared 36398 event pairs, 819 based on Foata normal form. 4/5873 useless extension candidates. Maximal degree in co-relation 51092. Up to 5456 conditions per place. [2024-06-21 21:03:58,512 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 273 selfloop transitions, 64 changer transitions 0/349 dead transitions. [2024-06-21 21:03:58,513 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 273 places, 349 transitions, 5144 flow [2024-06-21 21:03:58,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 21:03:58,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 21:03:58,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 131 transitions. [2024-06-21 21:03:58,513 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.445578231292517 [2024-06-21 21:03:58,513 INFO L175 Difference]: Start difference. First operand has 267 places, 330 transitions, 4188 flow. Second operand 7 states and 131 transitions. [2024-06-21 21:03:58,514 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 273 places, 349 transitions, 5144 flow [2024-06-21 21:03:59,847 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 270 places, 349 transitions, 4970 flow, removed 60 selfloop flow, removed 3 redundant places. [2024-06-21 21:03:59,851 INFO L231 Difference]: Finished difference. Result has 271 places, 333 transitions, 4216 flow [2024-06-21 21:03:59,851 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4046, PETRI_DIFFERENCE_MINUEND_PLACES=264, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=330, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=269, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4216, PETRI_PLACES=271, PETRI_TRANSITIONS=333} [2024-06-21 21:03:59,851 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 228 predicate places. [2024-06-21 21:03:59,852 INFO L495 AbstractCegarLoop]: Abstraction has has 271 places, 333 transitions, 4216 flow [2024-06-21 21:03:59,852 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.75) internal successors, (94), 8 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:03:59,852 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:03:59,852 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:03:59,852 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2024-06-21 21:03:59,852 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)] === [2024-06-21 21:03:59,853 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:03:59,853 INFO L85 PathProgramCache]: Analyzing trace with hash -1565303427, now seen corresponding path program 5 times [2024-06-21 21:03:59,853 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:03:59,853 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1527632634] [2024-06-21 21:03:59,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:03:59,853 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:03:59,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:04:00,615 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:04:00,615 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:04:00,615 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1527632634] [2024-06-21 21:04:00,615 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1527632634] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:04:00,615 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:04:00,615 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:04:00,615 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [260316595] [2024-06-21 21:04:00,615 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:04:00,616 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:04:00,616 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:04:00,616 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:04:00,616 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:04:00,683 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 21:04:00,683 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 271 places, 333 transitions, 4216 flow. Second operand has 9 states, 9 states have (on average 11.555555555555555) internal successors, (104), 9 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:04:00,683 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:04:00,683 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 21:04:00,683 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:04:01,936 INFO L124 PetriNetUnfolderBase]: 3639/5889 cut-off events. [2024-06-21 21:04:01,936 INFO L125 PetriNetUnfolderBase]: For 665512/665514 co-relation queries the response was YES. [2024-06-21 21:04:01,978 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51508 conditions, 5889 events. 3639/5889 cut-off events. For 665512/665514 co-relation queries the response was YES. Maximal size of possible extension queue 357. Compared 36554 event pairs, 815 based on Foata normal form. 4/5889 useless extension candidates. Maximal degree in co-relation 51382. Up to 5599 conditions per place. [2024-06-21 21:04:02,002 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 303 selfloop transitions, 31 changer transitions 0/346 dead transitions. [2024-06-21 21:04:02,002 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 278 places, 346 transitions, 4971 flow [2024-06-21 21:04:02,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:04:02,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:04:02,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 134 transitions. [2024-06-21 21:04:02,003 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39880952380952384 [2024-06-21 21:04:02,003 INFO L175 Difference]: Start difference. First operand has 271 places, 333 transitions, 4216 flow. Second operand 8 states and 134 transitions. [2024-06-21 21:04:02,003 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 278 places, 346 transitions, 4971 flow [2024-06-21 21:04:02,934 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 274 places, 346 transitions, 4859 flow, removed 12 selfloop flow, removed 4 redundant places. [2024-06-21 21:04:02,938 INFO L231 Difference]: Finished difference. Result has 275 places, 336 transitions, 4231 flow [2024-06-21 21:04:02,938 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4107, PETRI_DIFFERENCE_MINUEND_PLACES=267, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=333, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=302, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4231, PETRI_PLACES=275, PETRI_TRANSITIONS=336} [2024-06-21 21:04:02,939 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 232 predicate places. [2024-06-21 21:04:02,939 INFO L495 AbstractCegarLoop]: Abstraction has has 275 places, 336 transitions, 4231 flow [2024-06-21 21:04:02,939 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.555555555555555) internal successors, (104), 9 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:04:02,939 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:04:02,939 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:04:02,939 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2024-06-21 21:04:02,939 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)] === [2024-06-21 21:04:02,940 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:04:02,940 INFO L85 PathProgramCache]: Analyzing trace with hash 1151024387, now seen corresponding path program 6 times [2024-06-21 21:04:02,940 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:04:02,940 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1505123334] [2024-06-21 21:04:02,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:04:02,940 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:04:02,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:04:03,677 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:04:03,678 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:04:03,678 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1505123334] [2024-06-21 21:04:03,678 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1505123334] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:04:03,678 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:04:03,678 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:04:03,678 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1627538949] [2024-06-21 21:04:03,679 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:04:03,679 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:04:03,679 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:04:03,679 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:04:03,679 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:04:03,776 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 21:04:03,776 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 275 places, 336 transitions, 4231 flow. Second operand has 9 states, 9 states have (on average 11.555555555555555) internal successors, (104), 9 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:04:03,776 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:04:03,777 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 21:04:03,777 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:04:04,900 INFO L124 PetriNetUnfolderBase]: 3633/5881 cut-off events. [2024-06-21 21:04:04,900 INFO L125 PetriNetUnfolderBase]: For 675001/675003 co-relation queries the response was YES. [2024-06-21 21:04:04,947 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51396 conditions, 5881 events. 3633/5881 cut-off events. For 675001/675003 co-relation queries the response was YES. Maximal size of possible extension queue 356. Compared 36489 event pairs, 814 based on Foata normal form. 4/5881 useless extension candidates. Maximal degree in co-relation 51269. Up to 5567 conditions per place. [2024-06-21 21:04:04,972 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 296 selfloop transitions, 40 changer transitions 0/348 dead transitions. [2024-06-21 21:04:04,973 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 281 places, 348 transitions, 5101 flow [2024-06-21 21:04:04,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 21:04:04,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 21:04:04,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 125 transitions. [2024-06-21 21:04:04,973 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42517006802721086 [2024-06-21 21:04:04,974 INFO L175 Difference]: Start difference. First operand has 275 places, 336 transitions, 4231 flow. Second operand 7 states and 125 transitions. [2024-06-21 21:04:04,974 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 281 places, 348 transitions, 5101 flow [2024-06-21 21:04:05,878 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 276 places, 348 transitions, 4993 flow, removed 28 selfloop flow, removed 5 redundant places. [2024-06-21 21:04:05,882 INFO L231 Difference]: Finished difference. Result has 277 places, 336 transitions, 4209 flow [2024-06-21 21:04:05,883 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4123, PETRI_DIFFERENCE_MINUEND_PLACES=270, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=336, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=296, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4209, PETRI_PLACES=277, PETRI_TRANSITIONS=336} [2024-06-21 21:04:05,883 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 234 predicate places. [2024-06-21 21:04:05,883 INFO L495 AbstractCegarLoop]: Abstraction has has 277 places, 336 transitions, 4209 flow [2024-06-21 21:04:05,883 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.555555555555555) internal successors, (104), 9 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:04:05,883 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:04:05,883 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:04:05,883 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2024-06-21 21:04:05,883 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)] === [2024-06-21 21:04:05,884 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:04:05,884 INFO L85 PathProgramCache]: Analyzing trace with hash -576400323, now seen corresponding path program 2 times [2024-06-21 21:04:05,884 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:04:05,884 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [338986173] [2024-06-21 21:04:05,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:04:05,884 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:04:05,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:04:06,770 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:04:06,770 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:04:06,770 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [338986173] [2024-06-21 21:04:06,770 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [338986173] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:04:06,770 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:04:06,770 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:04:06,770 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2135270512] [2024-06-21 21:04:06,770 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:04:06,770 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:04:06,771 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:04:06,771 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:04:06,771 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:04:06,851 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 21:04:06,851 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 277 places, 336 transitions, 4209 flow. Second operand has 10 states, 10 states have (on average 10.5) internal successors, (105), 10 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:04:06,851 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:04:06,852 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 21:04:06,852 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:04:08,267 INFO L124 PetriNetUnfolderBase]: 3729/5979 cut-off events. [2024-06-21 21:04:08,267 INFO L125 PetriNetUnfolderBase]: For 689019/689019 co-relation queries the response was YES. [2024-06-21 21:04:08,315 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52199 conditions, 5979 events. 3729/5979 cut-off events. For 689019/689019 co-relation queries the response was YES. Maximal size of possible extension queue 357. Compared 36661 event pairs, 845 based on Foata normal form. 2/5977 useless extension candidates. Maximal degree in co-relation 52071. Up to 5700 conditions per place. [2024-06-21 21:04:08,339 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 298 selfloop transitions, 51 changer transitions 0/353 dead transitions. [2024-06-21 21:04:08,339 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 284 places, 353 transitions, 5173 flow [2024-06-21 21:04:08,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:04:08,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:04:08,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 136 transitions. [2024-06-21 21:04:08,340 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40476190476190477 [2024-06-21 21:04:08,341 INFO L175 Difference]: Start difference. First operand has 277 places, 336 transitions, 4209 flow. Second operand 8 states and 136 transitions. [2024-06-21 21:04:08,341 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 284 places, 353 transitions, 5173 flow [2024-06-21 21:04:09,649 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 279 places, 353 transitions, 5055 flow, removed 8 selfloop flow, removed 5 redundant places. [2024-06-21 21:04:09,653 INFO L231 Difference]: Finished difference. Result has 280 places, 339 transitions, 4253 flow [2024-06-21 21:04:09,653 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4091, PETRI_DIFFERENCE_MINUEND_PLACES=272, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=336, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=288, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4253, PETRI_PLACES=280, PETRI_TRANSITIONS=339} [2024-06-21 21:04:09,654 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 237 predicate places. [2024-06-21 21:04:09,654 INFO L495 AbstractCegarLoop]: Abstraction has has 280 places, 339 transitions, 4253 flow [2024-06-21 21:04:09,654 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.5) internal successors, (105), 10 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:04:09,654 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:04:09,654 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:04:09,654 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2024-06-21 21:04:09,654 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)] === [2024-06-21 21:04:09,655 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:04:09,655 INFO L85 PathProgramCache]: Analyzing trace with hash 1151257383, now seen corresponding path program 3 times [2024-06-21 21:04:09,655 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:04:09,655 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [882394099] [2024-06-21 21:04:09,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:04:09,655 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:04:09,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:04:10,513 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:04:10,514 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:04:10,514 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [882394099] [2024-06-21 21:04:10,514 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [882394099] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:04:10,514 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:04:10,514 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:04:10,514 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1144330763] [2024-06-21 21:04:10,514 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:04:10,514 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:04:10,514 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:04:10,515 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:04:10,515 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:04:10,610 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 21:04:10,610 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 280 places, 339 transitions, 4253 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:04:10,610 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:04:10,610 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 21:04:10,610 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:04:12,045 INFO L124 PetriNetUnfolderBase]: 3739/5995 cut-off events. [2024-06-21 21:04:12,045 INFO L125 PetriNetUnfolderBase]: For 704428/704428 co-relation queries the response was YES. [2024-06-21 21:04:12,095 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52512 conditions, 5995 events. 3739/5995 cut-off events. For 704428/704428 co-relation queries the response was YES. Maximal size of possible extension queue 359. Compared 36724 event pairs, 848 based on Foata normal form. 2/5993 useless extension candidates. Maximal degree in co-relation 52383. Up to 5710 conditions per place. [2024-06-21 21:04:12,120 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 300 selfloop transitions, 52 changer transitions 0/356 dead transitions. [2024-06-21 21:04:12,120 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 287 places, 356 transitions, 5231 flow [2024-06-21 21:04:12,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:04:12,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:04:12,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 137 transitions. [2024-06-21 21:04:12,121 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40773809523809523 [2024-06-21 21:04:12,121 INFO L175 Difference]: Start difference. First operand has 280 places, 339 transitions, 4253 flow. Second operand 8 states and 137 transitions. [2024-06-21 21:04:12,121 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 287 places, 356 transitions, 5231 flow [2024-06-21 21:04:13,351 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 282 places, 356 transitions, 5069 flow, removed 37 selfloop flow, removed 5 redundant places. [2024-06-21 21:04:13,355 INFO L231 Difference]: Finished difference. Result has 283 places, 342 transitions, 4261 flow [2024-06-21 21:04:13,356 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4110, PETRI_DIFFERENCE_MINUEND_PLACES=275, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=339, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=290, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4261, PETRI_PLACES=283, PETRI_TRANSITIONS=342} [2024-06-21 21:04:13,356 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 240 predicate places. [2024-06-21 21:04:13,356 INFO L495 AbstractCegarLoop]: Abstraction has has 283 places, 342 transitions, 4261 flow [2024-06-21 21:04:13,356 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:04:13,356 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:04:13,356 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:04:13,356 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2024-06-21 21:04:13,356 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)] === [2024-06-21 21:04:13,357 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:04:13,357 INFO L85 PathProgramCache]: Analyzing trace with hash -1561132969, now seen corresponding path program 4 times [2024-06-21 21:04:13,357 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:04:13,357 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [125206768] [2024-06-21 21:04:13,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:04:13,357 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:04:13,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:04:14,232 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:04:14,232 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:04:14,232 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [125206768] [2024-06-21 21:04:14,232 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [125206768] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:04:14,232 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:04:14,232 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:04:14,232 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1325343681] [2024-06-21 21:04:14,232 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:04:14,232 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:04:14,233 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:04:14,233 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:04:14,233 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:04:14,303 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 21:04:14,303 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 283 places, 342 transitions, 4261 flow. Second operand has 10 states, 10 states have (on average 10.5) internal successors, (105), 10 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:04:14,303 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:04:14,303 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 21:04:14,303 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:04:15,735 INFO L124 PetriNetUnfolderBase]: 3733/5987 cut-off events. [2024-06-21 21:04:15,736 INFO L125 PetriNetUnfolderBase]: For 713361/713361 co-relation queries the response was YES. [2024-06-21 21:04:15,786 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52415 conditions, 5987 events. 3733/5987 cut-off events. For 713361/713361 co-relation queries the response was YES. Maximal size of possible extension queue 358. Compared 36692 event pairs, 847 based on Foata normal form. 2/5985 useless extension candidates. Maximal degree in co-relation 52285. Up to 5705 conditions per place. [2024-06-21 21:04:15,810 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 303 selfloop transitions, 49 changer transitions 0/356 dead transitions. [2024-06-21 21:04:15,811 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 290 places, 356 transitions, 5031 flow [2024-06-21 21:04:15,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:04:15,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:04:15,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 137 transitions. [2024-06-21 21:04:15,811 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40773809523809523 [2024-06-21 21:04:15,811 INFO L175 Difference]: Start difference. First operand has 283 places, 342 transitions, 4261 flow. Second operand 8 states and 137 transitions. [2024-06-21 21:04:15,811 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 290 places, 356 transitions, 5031 flow [2024-06-21 21:04:17,018 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 284 places, 356 transitions, 4861 flow, removed 29 selfloop flow, removed 6 redundant places. [2024-06-21 21:04:17,023 INFO L231 Difference]: Finished difference. Result has 285 places, 342 transitions, 4195 flow [2024-06-21 21:04:17,023 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4091, PETRI_DIFFERENCE_MINUEND_PLACES=277, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=342, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=293, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4195, PETRI_PLACES=285, PETRI_TRANSITIONS=342} [2024-06-21 21:04:17,023 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 242 predicate places. [2024-06-21 21:04:17,023 INFO L495 AbstractCegarLoop]: Abstraction has has 285 places, 342 transitions, 4195 flow [2024-06-21 21:04:17,023 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.5) internal successors, (105), 10 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:04:17,023 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:04:17,023 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:04:17,024 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2024-06-21 21:04:17,024 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)] === [2024-06-21 21:04:17,024 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:04:17,024 INFO L85 PathProgramCache]: Analyzing trace with hash 1111313469, now seen corresponding path program 7 times [2024-06-21 21:04:17,024 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:04:17,024 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1383912113] [2024-06-21 21:04:17,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:04:17,024 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:04:17,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:04:17,666 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:04:17,666 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:04:17,666 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1383912113] [2024-06-21 21:04:17,667 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1383912113] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:04:17,667 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:04:17,667 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 21:04:17,667 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [558436390] [2024-06-21 21:04:17,667 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:04:17,667 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 21:04:17,667 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:04:17,667 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 21:04:17,668 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-21 21:04:17,745 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 21:04:17,745 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 285 places, 342 transitions, 4195 flow. Second operand has 8 states, 8 states have (on average 11.75) internal successors, (94), 8 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:04:17,746 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:04:17,746 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 21:04:17,746 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:04:19,042 INFO L124 PetriNetUnfolderBase]: 3650/5906 cut-off events. [2024-06-21 21:04:19,043 INFO L125 PetriNetUnfolderBase]: For 718677/718677 co-relation queries the response was YES. [2024-06-21 21:04:19,084 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51325 conditions, 5906 events. 3650/5906 cut-off events. For 718677/718677 co-relation queries the response was YES. Maximal size of possible extension queue 356. Compared 36618 event pairs, 808 based on Foata normal form. 2/5902 useless extension candidates. Maximal degree in co-relation 51195. Up to 5609 conditions per place. [2024-06-21 21:04:19,104 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 318 selfloop transitions, 37 changer transitions 0/367 dead transitions. [2024-06-21 21:04:19,104 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 292 places, 367 transitions, 5025 flow [2024-06-21 21:04:19,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:04:19,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:04:19,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 146 transitions. [2024-06-21 21:04:19,105 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43452380952380953 [2024-06-21 21:04:19,105 INFO L175 Difference]: Start difference. First operand has 285 places, 342 transitions, 4195 flow. Second operand 8 states and 146 transitions. [2024-06-21 21:04:19,105 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 292 places, 367 transitions, 5025 flow [2024-06-21 21:04:19,999 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 286 places, 367 transitions, 4902 flow, removed 9 selfloop flow, removed 6 redundant places. [2024-06-21 21:04:20,003 INFO L231 Difference]: Finished difference. Result has 287 places, 348 transitions, 4220 flow [2024-06-21 21:04:20,004 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4073, PETRI_DIFFERENCE_MINUEND_PLACES=279, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=342, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=308, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4220, PETRI_PLACES=287, PETRI_TRANSITIONS=348} [2024-06-21 21:04:20,004 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 244 predicate places. [2024-06-21 21:04:20,004 INFO L495 AbstractCegarLoop]: Abstraction has has 287 places, 348 transitions, 4220 flow [2024-06-21 21:04:20,004 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.75) internal successors, (94), 8 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:04:20,004 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:04:20,004 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:04:20,005 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2024-06-21 21:04:20,005 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)] === [2024-06-21 21:04:20,005 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:04:20,005 INFO L85 PathProgramCache]: Analyzing trace with hash -1754868709, now seen corresponding path program 1 times [2024-06-21 21:04:20,005 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:04:20,005 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [683857027] [2024-06-21 21:04:20,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:04:20,006 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:04:20,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:04:21,023 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:04:21,023 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:04:21,023 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [683857027] [2024-06-21 21:04:21,023 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [683857027] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:04:21,023 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:04:21,023 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:04:21,024 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1237383748] [2024-06-21 21:04:21,024 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:04:21,024 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:04:21,024 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:04:21,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:04:21,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:04:21,142 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-21 21:04:21,142 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 287 places, 348 transitions, 4220 flow. Second operand has 10 states, 10 states have (on average 12.5) internal successors, (125), 10 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) [2024-06-21 21:04:21,142 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:04:21,142 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-21 21:04:21,142 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:04:22,334 INFO L124 PetriNetUnfolderBase]: 3526/5782 cut-off events. [2024-06-21 21:04:22,334 INFO L125 PetriNetUnfolderBase]: For 643868/643868 co-relation queries the response was YES. [2024-06-21 21:04:22,383 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48731 conditions, 5782 events. 3526/5782 cut-off events. For 643868/643868 co-relation queries the response was YES. Maximal size of possible extension queue 357. Compared 36591 event pairs, 880 based on Foata normal form. 1/5772 useless extension candidates. Maximal degree in co-relation 48600. Up to 5429 conditions per place. [2024-06-21 21:04:22,407 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 333 selfloop transitions, 24 changer transitions 0/375 dead transitions. [2024-06-21 21:04:22,407 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 295 places, 375 transitions, 5272 flow [2024-06-21 21:04:22,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:04:22,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:04:22,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 166 transitions. [2024-06-21 21:04:22,408 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43915343915343913 [2024-06-21 21:04:22,408 INFO L175 Difference]: Start difference. First operand has 287 places, 348 transitions, 4220 flow. Second operand 9 states and 166 transitions. [2024-06-21 21:04:22,408 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 295 places, 375 transitions, 5272 flow [2024-06-21 21:04:23,760 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 287 places, 375 transitions, 5132 flow, removed 3 selfloop flow, removed 8 redundant places. [2024-06-21 21:04:23,765 INFO L231 Difference]: Finished difference. Result has 288 places, 354 transitions, 4256 flow [2024-06-21 21:04:23,765 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4080, PETRI_DIFFERENCE_MINUEND_PLACES=279, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=348, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=327, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4256, PETRI_PLACES=288, PETRI_TRANSITIONS=354} [2024-06-21 21:04:23,765 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 245 predicate places. [2024-06-21 21:04:23,765 INFO L495 AbstractCegarLoop]: Abstraction has has 288 places, 354 transitions, 4256 flow [2024-06-21 21:04:23,765 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.5) internal successors, (125), 10 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) [2024-06-21 21:04:23,766 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:04:23,766 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:04:23,766 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2024-06-21 21:04:23,766 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)] === [2024-06-21 21:04:23,766 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:04:23,766 INFO L85 PathProgramCache]: Analyzing trace with hash -1770902952, now seen corresponding path program 1 times [2024-06-21 21:04:23,767 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:04:23,767 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1079989707] [2024-06-21 21:04:23,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:04:23,767 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:04:23,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:04:24,665 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:04:24,665 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:04:24,665 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1079989707] [2024-06-21 21:04:24,665 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1079989707] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:04:24,665 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:04:24,665 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:04:24,666 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [263733683] [2024-06-21 21:04:24,666 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:04:24,666 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:04:24,666 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:04:24,666 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:04:24,666 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:04:24,746 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 21:04:24,746 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 288 places, 354 transitions, 4256 flow. Second operand has 10 states, 10 states have (on average 11.5) internal successors, (115), 10 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) [2024-06-21 21:04:24,746 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:04:24,747 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 21:04:24,747 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:04:25,949 INFO L124 PetriNetUnfolderBase]: 3625/5885 cut-off events. [2024-06-21 21:04:25,949 INFO L125 PetriNetUnfolderBase]: For 659756/659756 co-relation queries the response was YES. [2024-06-21 21:04:26,001 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49952 conditions, 5885 events. 3625/5885 cut-off events. For 659756/659756 co-relation queries the response was YES. Maximal size of possible extension queue 358. Compared 36748 event pairs, 907 based on Foata normal form. 1/5877 useless extension candidates. Maximal degree in co-relation 49820. Up to 5639 conditions per place. [2024-06-21 21:04:26,026 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 345 selfloop transitions, 18 changer transitions 0/373 dead transitions. [2024-06-21 21:04:26,026 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 295 places, 373 transitions, 5086 flow [2024-06-21 21:04:26,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:04:26,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:04:26,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 139 transitions. [2024-06-21 21:04:26,027 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41369047619047616 [2024-06-21 21:04:26,027 INFO L175 Difference]: Start difference. First operand has 288 places, 354 transitions, 4256 flow. Second operand 8 states and 139 transitions. [2024-06-21 21:04:26,027 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 295 places, 373 transitions, 5086 flow [2024-06-21 21:04:26,849 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 290 places, 373 transitions, 4995 flow, removed 36 selfloop flow, removed 5 redundant places. [2024-06-21 21:04:26,853 INFO L231 Difference]: Finished difference. Result has 291 places, 357 transitions, 4271 flow [2024-06-21 21:04:26,854 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4165, PETRI_DIFFERENCE_MINUEND_PLACES=283, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=354, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=336, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4271, PETRI_PLACES=291, PETRI_TRANSITIONS=357} [2024-06-21 21:04:26,854 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 248 predicate places. [2024-06-21 21:04:26,854 INFO L495 AbstractCegarLoop]: Abstraction has has 291 places, 357 transitions, 4271 flow [2024-06-21 21:04:26,854 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.5) internal successors, (115), 10 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) [2024-06-21 21:04:26,854 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:04:26,854 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:04:26,854 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2024-06-21 21:04:26,855 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)] === [2024-06-21 21:04:26,855 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:04:26,855 INFO L85 PathProgramCache]: Analyzing trace with hash -1770903107, now seen corresponding path program 2 times [2024-06-21 21:04:26,855 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:04:26,855 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [502188670] [2024-06-21 21:04:26,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:04:26,855 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:04:26,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:04:27,764 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:04:27,764 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:04:27,764 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [502188670] [2024-06-21 21:04:27,764 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [502188670] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:04:27,764 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:04:27,764 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:04:27,765 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1175596211] [2024-06-21 21:04:27,765 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:04:27,765 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:04:27,765 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:04:27,765 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:04:27,765 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:04:27,893 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-21 21:04:27,894 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 291 places, 357 transitions, 4271 flow. Second operand has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:04:27,894 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:04:27,894 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-21 21:04:27,894 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:04:29,083 INFO L124 PetriNetUnfolderBase]: 3538/5795 cut-off events. [2024-06-21 21:04:29,083 INFO L125 PetriNetUnfolderBase]: For 671708/671708 co-relation queries the response was YES. [2024-06-21 21:04:29,132 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49788 conditions, 5795 events. 3538/5795 cut-off events. For 671708/671708 co-relation queries the response was YES. Maximal size of possible extension queue 356. Compared 36644 event pairs, 879 based on Foata normal form. 1/5785 useless extension candidates. Maximal degree in co-relation 49654. Up to 5453 conditions per place. [2024-06-21 21:04:29,155 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 336 selfloop transitions, 18 changer transitions 0/373 dead transitions. [2024-06-21 21:04:29,155 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 298 places, 373 transitions, 5025 flow [2024-06-21 21:04:29,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:04:29,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:04:29,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 146 transitions. [2024-06-21 21:04:29,156 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43452380952380953 [2024-06-21 21:04:29,156 INFO L175 Difference]: Start difference. First operand has 291 places, 357 transitions, 4271 flow. Second operand 8 states and 146 transitions. [2024-06-21 21:04:29,156 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 298 places, 373 transitions, 5025 flow [2024-06-21 21:04:30,856 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 292 places, 373 transitions, 4915 flow, removed 39 selfloop flow, removed 6 redundant places. [2024-06-21 21:04:30,861 INFO L231 Difference]: Finished difference. Result has 293 places, 357 transitions, 4203 flow [2024-06-21 21:04:30,861 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4161, PETRI_DIFFERENCE_MINUEND_PLACES=285, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=357, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=339, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4203, PETRI_PLACES=293, PETRI_TRANSITIONS=357} [2024-06-21 21:04:30,861 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 250 predicate places. [2024-06-21 21:04:30,861 INFO L495 AbstractCegarLoop]: Abstraction has has 293 places, 357 transitions, 4203 flow [2024-06-21 21:04:30,861 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:04:30,861 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:04:30,862 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:04:30,862 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2024-06-21 21:04:30,862 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)] === [2024-06-21 21:04:30,862 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:04:30,862 INFO L85 PathProgramCache]: Analyzing trace with hash 1688076204, now seen corresponding path program 2 times [2024-06-21 21:04:30,862 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:04:30,862 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1375021868] [2024-06-21 21:04:30,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:04:30,863 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:04:30,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:04:31,763 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:04:31,764 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:04:31,764 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1375021868] [2024-06-21 21:04:31,764 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1375021868] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:04:31,764 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:04:31,764 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:04:31,764 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1660225385] [2024-06-21 21:04:31,764 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:04:31,764 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:04:31,764 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:04:31,765 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:04:31,765 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:04:31,856 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 21:04:31,856 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 293 places, 357 transitions, 4203 flow. Second operand has 10 states, 10 states have (on average 11.5) internal successors, (115), 10 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) [2024-06-21 21:04:31,856 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:04:31,856 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 21:04:31,856 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:04:32,925 INFO L124 PetriNetUnfolderBase]: 3635/5899 cut-off events. [2024-06-21 21:04:32,925 INFO L125 PetriNetUnfolderBase]: For 687639/687639 co-relation queries the response was YES. [2024-06-21 21:04:32,980 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50596 conditions, 5899 events. 3635/5899 cut-off events. For 687639/687639 co-relation queries the response was YES. Maximal size of possible extension queue 358. Compared 36832 event pairs, 909 based on Foata normal form. 1/5891 useless extension candidates. Maximal degree in co-relation 50461. Up to 5611 conditions per place. [2024-06-21 21:04:33,169 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 325 selfloop transitions, 46 changer transitions 0/381 dead transitions. [2024-06-21 21:04:33,169 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 301 places, 381 transitions, 5513 flow [2024-06-21 21:04:33,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:04:33,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:04:33,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 156 transitions. [2024-06-21 21:04:33,170 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4126984126984127 [2024-06-21 21:04:33,170 INFO L175 Difference]: Start difference. First operand has 293 places, 357 transitions, 4203 flow. Second operand 9 states and 156 transitions. [2024-06-21 21:04:33,170 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 301 places, 381 transitions, 5513 flow [2024-06-21 21:04:34,746 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 294 places, 381 transitions, 5467 flow, removed 3 selfloop flow, removed 7 redundant places. [2024-06-21 21:04:34,750 INFO L231 Difference]: Finished difference. Result has 295 places, 366 transitions, 4453 flow [2024-06-21 21:04:34,750 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4157, PETRI_DIFFERENCE_MINUEND_PLACES=286, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=357, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=317, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4453, PETRI_PLACES=295, PETRI_TRANSITIONS=366} [2024-06-21 21:04:34,751 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 252 predicate places. [2024-06-21 21:04:34,751 INFO L495 AbstractCegarLoop]: Abstraction has has 295 places, 366 transitions, 4453 flow [2024-06-21 21:04:34,751 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.5) internal successors, (115), 10 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) [2024-06-21 21:04:34,751 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:04:34,751 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:04:34,751 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2024-06-21 21:04:34,751 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)] === [2024-06-21 21:04:34,752 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:04:34,752 INFO L85 PathProgramCache]: Analyzing trace with hash 1688076421, now seen corresponding path program 1 times [2024-06-21 21:04:34,752 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:04:34,752 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1493565304] [2024-06-21 21:04:34,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:04:34,752 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:04:34,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:04:35,536 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:04:35,536 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:04:35,536 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1493565304] [2024-06-21 21:04:35,536 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1493565304] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:04:35,536 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:04:35,536 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:04:35,536 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [325164948] [2024-06-21 21:04:35,536 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:04:35,537 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:04:35,537 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:04:35,537 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:04:35,537 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:04:35,648 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 21:04:35,648 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 295 places, 366 transitions, 4453 flow. Second operand has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:04:35,649 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:04:35,649 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 21:04:35,649 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:04:36,769 INFO L124 PetriNetUnfolderBase]: 3653/5926 cut-off events. [2024-06-21 21:04:36,770 INFO L125 PetriNetUnfolderBase]: For 711815/711815 co-relation queries the response was YES. [2024-06-21 21:04:36,820 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51364 conditions, 5926 events. 3653/5926 cut-off events. For 711815/711815 co-relation queries the response was YES. Maximal size of possible extension queue 361. Compared 37058 event pairs, 909 based on Foata normal form. 2/5919 useless extension candidates. Maximal degree in co-relation 51228. Up to 5648 conditions per place. [2024-06-21 21:04:36,843 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 346 selfloop transitions, 35 changer transitions 0/391 dead transitions. [2024-06-21 21:04:36,844 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 302 places, 391 transitions, 5545 flow [2024-06-21 21:04:36,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:04:36,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:04:36,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 145 transitions. [2024-06-21 21:04:36,845 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43154761904761907 [2024-06-21 21:04:36,845 INFO L175 Difference]: Start difference. First operand has 295 places, 366 transitions, 4453 flow. Second operand 8 states and 145 transitions. [2024-06-21 21:04:36,845 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 302 places, 391 transitions, 5545 flow [2024-06-21 21:04:38,381 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 298 places, 391 transitions, 5452 flow, removed 35 selfloop flow, removed 4 redundant places. [2024-06-21 21:04:38,385 INFO L231 Difference]: Finished difference. Result has 300 places, 375 transitions, 4579 flow [2024-06-21 21:04:38,385 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4360, PETRI_DIFFERENCE_MINUEND_PLACES=291, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=366, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=334, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4579, PETRI_PLACES=300, PETRI_TRANSITIONS=375} [2024-06-21 21:04:38,386 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 257 predicate places. [2024-06-21 21:04:38,386 INFO L495 AbstractCegarLoop]: Abstraction has has 300 places, 375 transitions, 4579 flow [2024-06-21 21:04:38,386 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:04:38,386 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:04:38,386 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:04:38,386 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2024-06-21 21:04:38,386 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)] === [2024-06-21 21:04:38,386 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:04:38,387 INFO L85 PathProgramCache]: Analyzing trace with hash 1688070469, now seen corresponding path program 3 times [2024-06-21 21:04:38,387 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:04:38,387 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1848217130] [2024-06-21 21:04:38,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:04:38,387 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:04:38,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:04:39,356 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:04:39,356 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:04:39,356 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1848217130] [2024-06-21 21:04:39,356 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1848217130] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:04:39,356 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:04:39,356 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:04:39,357 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [190284480] [2024-06-21 21:04:39,357 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:04:39,357 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:04:39,357 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:04:39,357 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:04:39,357 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:04:39,475 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-21 21:04:39,475 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 300 places, 375 transitions, 4579 flow. Second operand has 10 states, 10 states have (on average 12.5) internal successors, (125), 10 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) [2024-06-21 21:04:39,475 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:04:39,475 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-21 21:04:39,475 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:04:40,625 INFO L124 PetriNetUnfolderBase]: 3573/5846 cut-off events. [2024-06-21 21:04:40,625 INFO L125 PetriNetUnfolderBase]: For 726478/726478 co-relation queries the response was YES. [2024-06-21 21:04:40,680 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51581 conditions, 5846 events. 3573/5846 cut-off events. For 726478/726478 co-relation queries the response was YES. Maximal size of possible extension queue 360. Compared 36912 event pairs, 879 based on Foata normal form. 1/5836 useless extension candidates. Maximal degree in co-relation 51442. Up to 5482 conditions per place. [2024-06-21 21:04:40,705 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 339 selfloop transitions, 30 changer transitions 0/391 dead transitions. [2024-06-21 21:04:40,705 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 307 places, 391 transitions, 5423 flow [2024-06-21 21:04:40,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:04:40,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:04:40,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 147 transitions. [2024-06-21 21:04:40,706 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4375 [2024-06-21 21:04:40,706 INFO L175 Difference]: Start difference. First operand has 300 places, 375 transitions, 4579 flow. Second operand 8 states and 147 transitions. [2024-06-21 21:04:40,706 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 307 places, 391 transitions, 5423 flow [2024-06-21 21:04:42,822 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 304 places, 391 transitions, 5355 flow, removed 29 selfloop flow, removed 3 redundant places. [2024-06-21 21:04:42,826 INFO L231 Difference]: Finished difference. Result has 305 places, 378 transitions, 4653 flow [2024-06-21 21:04:42,827 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4511, PETRI_DIFFERENCE_MINUEND_PLACES=297, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=375, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=345, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4653, PETRI_PLACES=305, PETRI_TRANSITIONS=378} [2024-06-21 21:04:42,827 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 262 predicate places. [2024-06-21 21:04:42,827 INFO L495 AbstractCegarLoop]: Abstraction has has 305 places, 378 transitions, 4653 flow [2024-06-21 21:04:42,827 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.5) internal successors, (125), 10 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) [2024-06-21 21:04:42,827 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:04:42,827 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:04:42,827 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2024-06-21 21:04:42,827 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)] === [2024-06-21 21:04:42,828 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:04:42,828 INFO L85 PathProgramCache]: Analyzing trace with hash -1767183882, now seen corresponding path program 3 times [2024-06-21 21:04:42,828 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:04:42,828 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1492144724] [2024-06-21 21:04:42,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:04:42,828 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:04:42,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:04:43,687 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:04:43,687 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:04:43,687 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1492144724] [2024-06-21 21:04:43,687 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1492144724] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:04:43,687 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:04:43,687 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:04:43,687 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1895377016] [2024-06-21 21:04:43,687 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:04:43,687 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:04:43,688 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:04:43,688 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:04:43,688 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:04:43,806 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 21:04:43,806 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 305 places, 378 transitions, 4653 flow. Second operand has 10 states, 10 states have (on average 11.5) internal successors, (115), 10 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) [2024-06-21 21:04:43,806 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:04:43,807 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 21:04:43,807 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:04:45,009 INFO L124 PetriNetUnfolderBase]: 3655/5929 cut-off events. [2024-06-21 21:04:45,009 INFO L125 PetriNetUnfolderBase]: For 737091/737091 co-relation queries the response was YES. [2024-06-21 21:04:45,061 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52518 conditions, 5929 events. 3655/5929 cut-off events. For 737091/737091 co-relation queries the response was YES. Maximal size of possible extension queue 360. Compared 37037 event pairs, 908 based on Foata normal form. 1/5921 useless extension candidates. Maximal degree in co-relation 52376. Up to 5640 conditions per place. [2024-06-21 21:04:45,086 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 338 selfloop transitions, 44 changer transitions 0/392 dead transitions. [2024-06-21 21:04:45,086 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 312 places, 392 transitions, 5629 flow [2024-06-21 21:04:45,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:04:45,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:04:45,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 145 transitions. [2024-06-21 21:04:45,087 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43154761904761907 [2024-06-21 21:04:45,087 INFO L175 Difference]: Start difference. First operand has 305 places, 378 transitions, 4653 flow. Second operand 8 states and 145 transitions. [2024-06-21 21:04:45,087 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 312 places, 392 transitions, 5629 flow [2024-06-21 21:04:46,815 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 306 places, 392 transitions, 5471 flow, removed 51 selfloop flow, removed 6 redundant places. [2024-06-21 21:04:46,819 INFO L231 Difference]: Finished difference. Result has 307 places, 378 transitions, 4589 flow [2024-06-21 21:04:46,820 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4495, PETRI_DIFFERENCE_MINUEND_PLACES=299, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=378, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=334, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4589, PETRI_PLACES=307, PETRI_TRANSITIONS=378} [2024-06-21 21:04:46,820 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 264 predicate places. [2024-06-21 21:04:46,820 INFO L495 AbstractCegarLoop]: Abstraction has has 307 places, 378 transitions, 4589 flow [2024-06-21 21:04:46,820 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.5) internal successors, (115), 10 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) [2024-06-21 21:04:46,820 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:04:46,820 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:04:46,820 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2024-06-21 21:04:46,820 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)] === [2024-06-21 21:04:46,821 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:04:46,821 INFO L85 PathProgramCache]: Analyzing trace with hash -1559575619, now seen corresponding path program 2 times [2024-06-21 21:04:46,821 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:04:46,821 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1346413120] [2024-06-21 21:04:46,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:04:46,821 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:04:46,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:04:47,583 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:04:47,583 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:04:47,583 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1346413120] [2024-06-21 21:04:47,583 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1346413120] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:04:47,583 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:04:47,583 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:04:47,583 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [867118877] [2024-06-21 21:04:47,583 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:04:47,584 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:04:47,584 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:04:47,584 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:04:47,584 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:04:47,680 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 21:04:47,680 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 307 places, 378 transitions, 4589 flow. Second operand has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:04:47,680 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:04:47,680 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 21:04:47,681 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:04:48,886 INFO L124 PetriNetUnfolderBase]: 3679/5964 cut-off events. [2024-06-21 21:04:48,886 INFO L125 PetriNetUnfolderBase]: For 760405/760405 co-relation queries the response was YES. [2024-06-21 21:04:48,940 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53021 conditions, 5964 events. 3679/5964 cut-off events. For 760405/760405 co-relation queries the response was YES. Maximal size of possible extension queue 362. Compared 37258 event pairs, 906 based on Foata normal form. 2/5957 useless extension candidates. Maximal degree in co-relation 52878. Up to 5699 conditions per place. [2024-06-21 21:04:48,964 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 355 selfloop transitions, 29 changer transitions 0/394 dead transitions. [2024-06-21 21:04:48,965 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 314 places, 394 transitions, 5619 flow [2024-06-21 21:04:48,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:04:48,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:04:48,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 140 transitions. [2024-06-21 21:04:48,966 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4166666666666667 [2024-06-21 21:04:48,966 INFO L175 Difference]: Start difference. First operand has 307 places, 378 transitions, 4589 flow. Second operand 8 states and 140 transitions. [2024-06-21 21:04:48,966 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 314 places, 394 transitions, 5619 flow [2024-06-21 21:04:51,053 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 307 places, 394 transitions, 5513 flow, removed 5 selfloop flow, removed 7 redundant places. [2024-06-21 21:04:51,058 INFO L231 Difference]: Finished difference. Result has 308 places, 381 transitions, 4597 flow [2024-06-21 21:04:51,058 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4483, PETRI_DIFFERENCE_MINUEND_PLACES=300, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=378, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=352, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4597, PETRI_PLACES=308, PETRI_TRANSITIONS=381} [2024-06-21 21:04:51,058 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 265 predicate places. [2024-06-21 21:04:51,058 INFO L495 AbstractCegarLoop]: Abstraction has has 308 places, 381 transitions, 4597 flow [2024-06-21 21:04:51,059 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:04:51,059 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:04:51,059 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:04:51,059 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2024-06-21 21:04:51,059 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)] === [2024-06-21 21:04:51,059 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:04:51,060 INFO L85 PathProgramCache]: Analyzing trace with hash -1555413314, now seen corresponding path program 4 times [2024-06-21 21:04:51,060 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:04:51,060 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [534189221] [2024-06-21 21:04:51,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:04:51,060 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:04:51,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:04:51,887 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:04:51,887 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:04:51,887 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [534189221] [2024-06-21 21:04:51,887 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [534189221] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:04:51,887 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:04:51,888 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:04:51,888 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [262175690] [2024-06-21 21:04:51,888 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:04:51,888 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:04:51,888 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:04:51,888 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:04:51,888 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:04:51,976 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 21:04:51,976 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 308 places, 381 transitions, 4597 flow. Second operand has 10 states, 10 states have (on average 11.5) internal successors, (115), 10 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) [2024-06-21 21:04:51,976 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:04:51,976 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 21:04:51,976 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:04:53,180 INFO L124 PetriNetUnfolderBase]: 3678/5963 cut-off events. [2024-06-21 21:04:53,180 INFO L125 PetriNetUnfolderBase]: For 771408/771408 co-relation queries the response was YES. [2024-06-21 21:04:53,233 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53160 conditions, 5963 events. 3678/5963 cut-off events. For 771408/771408 co-relation queries the response was YES. Maximal size of possible extension queue 363. Compared 37258 event pairs, 906 based on Foata normal form. 1/5955 useless extension candidates. Maximal degree in co-relation 53016. Up to 5708 conditions per place. [2024-06-21 21:04:53,258 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 359 selfloop transitions, 30 changer transitions 0/399 dead transitions. [2024-06-21 21:04:53,258 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 315 places, 399 transitions, 5897 flow [2024-06-21 21:04:53,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:04:53,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:04:53,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 139 transitions. [2024-06-21 21:04:53,259 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41369047619047616 [2024-06-21 21:04:53,259 INFO L175 Difference]: Start difference. First operand has 308 places, 381 transitions, 4597 flow. Second operand 8 states and 139 transitions. [2024-06-21 21:04:53,259 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 315 places, 399 transitions, 5897 flow [2024-06-21 21:04:55,073 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 309 places, 399 transitions, 5790 flow, removed 21 selfloop flow, removed 6 redundant places. [2024-06-21 21:04:55,078 INFO L231 Difference]: Finished difference. Result has 310 places, 387 transitions, 4692 flow [2024-06-21 21:04:55,078 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4490, PETRI_DIFFERENCE_MINUEND_PLACES=302, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=381, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=357, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4692, PETRI_PLACES=310, PETRI_TRANSITIONS=387} [2024-06-21 21:04:55,079 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 267 predicate places. [2024-06-21 21:04:55,079 INFO L495 AbstractCegarLoop]: Abstraction has has 310 places, 387 transitions, 4692 flow [2024-06-21 21:04:55,079 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.5) internal successors, (115), 10 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) [2024-06-21 21:04:55,079 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:04:55,079 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:04:55,079 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2024-06-21 21:04:55,079 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)] === [2024-06-21 21:04:55,079 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:04:55,079 INFO L85 PathProgramCache]: Analyzing trace with hash -1548061664, now seen corresponding path program 5 times [2024-06-21 21:04:55,079 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:04:55,080 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1613865891] [2024-06-21 21:04:55,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:04:55,080 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:04:55,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:04:55,876 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:04:55,876 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:04:55,876 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1613865891] [2024-06-21 21:04:55,876 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1613865891] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:04:55,877 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:04:55,877 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:04:55,877 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [977080682] [2024-06-21 21:04:55,877 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:04:55,877 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:04:55,877 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:04:55,877 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:04:55,877 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:04:55,952 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 21:04:55,953 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 310 places, 387 transitions, 4692 flow. Second operand has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:04:55,953 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:04:55,953 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 21:04:55,953 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:04:57,266 INFO L124 PetriNetUnfolderBase]: 3675/5959 cut-off events. [2024-06-21 21:04:57,266 INFO L125 PetriNetUnfolderBase]: For 781723/781723 co-relation queries the response was YES. [2024-06-21 21:04:57,322 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53112 conditions, 5959 events. 3675/5959 cut-off events. For 781723/781723 co-relation queries the response was YES. Maximal size of possible extension queue 362. Compared 37237 event pairs, 906 based on Foata normal form. 1/5951 useless extension candidates. Maximal degree in co-relation 52968. Up to 5721 conditions per place. [2024-06-21 21:04:57,347 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 369 selfloop transitions, 18 changer transitions 0/397 dead transitions. [2024-06-21 21:04:57,347 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 317 places, 397 transitions, 5492 flow [2024-06-21 21:04:57,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:04:57,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:04:57,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 133 transitions. [2024-06-21 21:04:57,348 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3958333333333333 [2024-06-21 21:04:57,348 INFO L175 Difference]: Start difference. First operand has 310 places, 387 transitions, 4692 flow. Second operand 8 states and 133 transitions. [2024-06-21 21:04:57,348 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 317 places, 397 transitions, 5492 flow [2024-06-21 21:04:59,294 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 312 places, 397 transitions, 5322 flow, removed 55 selfloop flow, removed 5 redundant places. [2024-06-21 21:04:59,298 INFO L231 Difference]: Finished difference. Result has 313 places, 387 transitions, 4564 flow [2024-06-21 21:04:59,298 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4522, PETRI_DIFFERENCE_MINUEND_PLACES=305, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=387, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=369, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4564, PETRI_PLACES=313, PETRI_TRANSITIONS=387} [2024-06-21 21:04:59,299 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 270 predicate places. [2024-06-21 21:04:59,299 INFO L495 AbstractCegarLoop]: Abstraction has has 313 places, 387 transitions, 4564 flow [2024-06-21 21:04:59,299 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:04:59,299 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:04:59,299 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:04:59,299 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2024-06-21 21:04:59,299 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)] === [2024-06-21 21:04:59,299 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:04:59,299 INFO L85 PathProgramCache]: Analyzing trace with hash -1555418894, now seen corresponding path program 6 times [2024-06-21 21:04:59,300 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:04:59,300 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1312689620] [2024-06-21 21:04:59,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:04:59,300 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:04:59,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:05:00,063 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:05:00,063 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:05:00,063 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1312689620] [2024-06-21 21:05:00,063 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1312689620] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:05:00,063 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:05:00,063 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:05:00,063 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1330381035] [2024-06-21 21:05:00,064 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:05:00,064 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:05:00,064 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:05:00,064 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:05:00,064 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:05:00,151 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 21:05:00,151 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 313 places, 387 transitions, 4564 flow. Second operand has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:05:00,151 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:05:00,151 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 21:05:00,151 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:05:01,448 INFO L124 PetriNetUnfolderBase]: 3686/5974 cut-off events. [2024-06-21 21:05:01,448 INFO L125 PetriNetUnfolderBase]: For 796730/796730 co-relation queries the response was YES. [2024-06-21 21:05:01,494 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53297 conditions, 5974 events. 3686/5974 cut-off events. For 796730/796730 co-relation queries the response was YES. Maximal size of possible extension queue 361. Compared 37332 event pairs, 906 based on Foata normal form. 1/5966 useless extension candidates. Maximal degree in co-relation 53152. Up to 5721 conditions per place. [2024-06-21 21:05:01,516 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 356 selfloop transitions, 31 changer transitions 0/397 dead transitions. [2024-06-21 21:05:01,517 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 320 places, 397 transitions, 5364 flow [2024-06-21 21:05:01,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:05:01,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:05:01,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 136 transitions. [2024-06-21 21:05:01,517 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40476190476190477 [2024-06-21 21:05:01,517 INFO L175 Difference]: Start difference. First operand has 313 places, 387 transitions, 4564 flow. Second operand 8 states and 136 transitions. [2024-06-21 21:05:01,517 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 320 places, 397 transitions, 5364 flow [2024-06-21 21:05:03,743 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 313 places, 397 transitions, 5266 flow, removed 27 selfloop flow, removed 7 redundant places. [2024-06-21 21:05:03,748 INFO L231 Difference]: Finished difference. Result has 314 places, 387 transitions, 4534 flow [2024-06-21 21:05:03,748 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4466, PETRI_DIFFERENCE_MINUEND_PLACES=306, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=387, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=356, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4534, PETRI_PLACES=314, PETRI_TRANSITIONS=387} [2024-06-21 21:05:03,748 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 271 predicate places. [2024-06-21 21:05:03,748 INFO L495 AbstractCegarLoop]: Abstraction has has 314 places, 387 transitions, 4534 flow [2024-06-21 21:05:03,749 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:05:03,749 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:05:03,749 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:05:03,749 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2024-06-21 21:05:03,749 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)] === [2024-06-21 21:05:03,749 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:05:03,749 INFO L85 PathProgramCache]: Analyzing trace with hash -571074213, now seen corresponding path program 4 times [2024-06-21 21:05:03,749 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:05:03,749 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [667334013] [2024-06-21 21:05:03,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:05:03,749 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:05:03,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:05:04,618 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:05:04,618 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:05:04,618 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [667334013] [2024-06-21 21:05:04,618 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [667334013] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:05:04,618 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:05:04,618 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:05:04,618 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1037801007] [2024-06-21 21:05:04,618 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:05:04,618 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:05:04,618 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:05:04,619 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:05:04,619 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:05:04,752 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-21 21:05:04,752 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 314 places, 387 transitions, 4534 flow. Second operand has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:05:04,752 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:05:04,752 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-21 21:05:04,752 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:05:05,931 INFO L124 PetriNetUnfolderBase]: 3583/5863 cut-off events. [2024-06-21 21:05:05,931 INFO L125 PetriNetUnfolderBase]: For 804991/804991 co-relation queries the response was YES. [2024-06-21 21:05:05,987 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52567 conditions, 5863 events. 3583/5863 cut-off events. For 804991/804991 co-relation queries the response was YES. Maximal size of possible extension queue 359. Compared 37084 event pairs, 878 based on Foata normal form. 1/5853 useless extension candidates. Maximal degree in co-relation 52421. Up to 5522 conditions per place. [2024-06-21 21:05:06,011 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 358 selfloop transitions, 18 changer transitions 0/400 dead transitions. [2024-06-21 21:05:06,011 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 321 places, 400 transitions, 5388 flow [2024-06-21 21:05:06,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:05:06,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:05:06,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 140 transitions. [2024-06-21 21:05:06,012 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4166666666666667 [2024-06-21 21:05:06,012 INFO L175 Difference]: Start difference. First operand has 314 places, 387 transitions, 4534 flow. Second operand 8 states and 140 transitions. [2024-06-21 21:05:06,012 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 321 places, 400 transitions, 5388 flow [2024-06-21 21:05:07,919 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 314 places, 400 transitions, 5318 flow, removed 2 selfloop flow, removed 7 redundant places. [2024-06-21 21:05:07,923 INFO L231 Difference]: Finished difference. Result has 315 places, 390 transitions, 4588 flow [2024-06-21 21:05:07,924 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4464, PETRI_DIFFERENCE_MINUEND_PLACES=307, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=387, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=369, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4588, PETRI_PLACES=315, PETRI_TRANSITIONS=390} [2024-06-21 21:05:07,924 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 272 predicate places. [2024-06-21 21:05:07,924 INFO L495 AbstractCegarLoop]: Abstraction has has 315 places, 390 transitions, 4588 flow [2024-06-21 21:05:07,924 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:05:07,924 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:05:07,924 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:05:07,924 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2024-06-21 21:05:07,925 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)] === [2024-06-21 21:05:07,925 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:05:07,925 INFO L85 PathProgramCache]: Analyzing trace with hash -563716611, now seen corresponding path program 3 times [2024-06-21 21:05:07,925 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:05:07,925 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [377351381] [2024-06-21 21:05:07,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:05:07,925 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:05:07,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:05:08,658 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:05:08,659 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:05:08,659 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [377351381] [2024-06-21 21:05:08,659 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [377351381] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:05:08,659 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:05:08,659 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:05:08,659 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1045177894] [2024-06-21 21:05:08,659 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:05:08,659 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:05:08,659 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:05:08,659 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:05:08,660 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:05:08,746 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 21:05:08,746 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 315 places, 390 transitions, 4588 flow. Second operand has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:05:08,746 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:05:08,746 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 21:05:08,746 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:05:09,955 INFO L124 PetriNetUnfolderBase]: 3693/5986 cut-off events. [2024-06-21 21:05:09,955 INFO L125 PetriNetUnfolderBase]: For 830275/830275 co-relation queries the response was YES. [2024-06-21 21:05:10,010 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54036 conditions, 5986 events. 3693/5986 cut-off events. For 830275/830275 co-relation queries the response was YES. Maximal size of possible extension queue 362. Compared 37482 event pairs, 906 based on Foata normal form. 2/5979 useless extension candidates. Maximal degree in co-relation 53889. Up to 5727 conditions per place. [2024-06-21 21:05:10,036 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 371 selfloop transitions, 25 changer transitions 0/406 dead transitions. [2024-06-21 21:05:10,036 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 322 places, 406 transitions, 5648 flow [2024-06-21 21:05:10,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:05:10,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:05:10,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 138 transitions. [2024-06-21 21:05:10,037 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4107142857142857 [2024-06-21 21:05:10,037 INFO L175 Difference]: Start difference. First operand has 315 places, 390 transitions, 4588 flow. Second operand 8 states and 138 transitions. [2024-06-21 21:05:10,037 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 322 places, 406 transitions, 5648 flow [2024-06-21 21:05:12,426 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 316 places, 406 transitions, 5546 flow, removed 35 selfloop flow, removed 6 redundant places. [2024-06-21 21:05:12,431 INFO L231 Difference]: Finished difference. Result has 317 places, 393 transitions, 4588 flow [2024-06-21 21:05:12,431 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4486, PETRI_DIFFERENCE_MINUEND_PLACES=309, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=390, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=368, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4588, PETRI_PLACES=317, PETRI_TRANSITIONS=393} [2024-06-21 21:05:12,431 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 274 predicate places. [2024-06-21 21:05:12,431 INFO L495 AbstractCegarLoop]: Abstraction has has 317 places, 393 transitions, 4588 flow [2024-06-21 21:05:12,431 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:05:12,431 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:05:12,432 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:05:12,432 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2024-06-21 21:05:12,432 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)] === [2024-06-21 21:05:12,432 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:05:12,432 INFO L85 PathProgramCache]: Analyzing trace with hash -1547794537, now seen corresponding path program 4 times [2024-06-21 21:05:12,432 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:05:12,432 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [127501619] [2024-06-21 21:05:12,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:05:12,432 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:05:12,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:05:13,175 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:05:13,175 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:05:13,176 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [127501619] [2024-06-21 21:05:13,176 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [127501619] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:05:13,176 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:05:13,176 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:05:13,176 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2070087916] [2024-06-21 21:05:13,176 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:05:13,176 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:05:13,176 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:05:13,176 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:05:13,176 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:05:13,282 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 21:05:13,282 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 317 places, 393 transitions, 4588 flow. Second operand has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:05:13,282 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:05:13,282 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 21:05:13,283 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:05:14,698 INFO L124 PetriNetUnfolderBase]: 3678/5964 cut-off events. [2024-06-21 21:05:14,698 INFO L125 PetriNetUnfolderBase]: For 836180/836180 co-relation queries the response was YES. [2024-06-21 21:05:14,745 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53693 conditions, 5964 events. 3678/5964 cut-off events. For 836180/836180 co-relation queries the response was YES. Maximal size of possible extension queue 361. Compared 37333 event pairs, 905 based on Foata normal form. 3/5958 useless extension candidates. Maximal degree in co-relation 53545. Up to 5718 conditions per place. [2024-06-21 21:05:14,769 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 373 selfloop transitions, 21 changer transitions 0/404 dead transitions. [2024-06-21 21:05:14,769 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 325 places, 404 transitions, 5406 flow [2024-06-21 21:05:14,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:05:14,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:05:14,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 145 transitions. [2024-06-21 21:05:14,770 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3835978835978836 [2024-06-21 21:05:14,770 INFO L175 Difference]: Start difference. First operand has 317 places, 393 transitions, 4588 flow. Second operand 9 states and 145 transitions. [2024-06-21 21:05:14,770 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 325 places, 404 transitions, 5406 flow [2024-06-21 21:05:17,333 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 319 places, 404 transitions, 5290 flow, removed 31 selfloop flow, removed 6 redundant places. [2024-06-21 21:05:17,338 INFO L231 Difference]: Finished difference. Result has 320 places, 393 transitions, 4521 flow [2024-06-21 21:05:17,338 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4472, PETRI_DIFFERENCE_MINUEND_PLACES=311, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=393, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=372, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4521, PETRI_PLACES=320, PETRI_TRANSITIONS=393} [2024-06-21 21:05:17,338 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 277 predicate places. [2024-06-21 21:05:17,338 INFO L495 AbstractCegarLoop]: Abstraction has has 320 places, 393 transitions, 4521 flow [2024-06-21 21:05:17,339 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:05:17,339 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:05:17,339 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:05:17,339 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2024-06-21 21:05:17,339 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)] === [2024-06-21 21:05:17,339 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:05:17,339 INFO L85 PathProgramCache]: Analyzing trace with hash -2137893755, now seen corresponding path program 1 times [2024-06-21 21:05:17,339 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:05:17,339 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1238421005] [2024-06-21 21:05:17,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:05:17,339 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:05:17,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:05:18,283 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:05:18,283 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:05:18,283 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1238421005] [2024-06-21 21:05:18,283 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1238421005] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:05:18,283 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:05:18,283 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:05:18,283 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1248572821] [2024-06-21 21:05:18,283 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:05:18,283 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:05:18,284 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:05:18,284 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:05:18,284 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:05:18,375 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 21:05:18,375 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 320 places, 393 transitions, 4521 flow. Second operand has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:05:18,375 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:05:18,375 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 21:05:18,375 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:05:19,670 INFO L124 PetriNetUnfolderBase]: 3741/6031 cut-off events. [2024-06-21 21:05:19,671 INFO L125 PetriNetUnfolderBase]: For 964775/964775 co-relation queries the response was YES. [2024-06-21 21:05:19,729 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56704 conditions, 6031 events. 3741/6031 cut-off events. For 964775/964775 co-relation queries the response was YES. Maximal size of possible extension queue 360. Compared 37385 event pairs, 804 based on Foata normal form. 1/6026 useless extension candidates. Maximal degree in co-relation 56555. Up to 5683 conditions per place. [2024-06-21 21:05:19,755 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 360 selfloop transitions, 45 changer transitions 0/423 dead transitions. [2024-06-21 21:05:19,755 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 327 places, 423 transitions, 5731 flow [2024-06-21 21:05:19,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:05:19,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:05:19,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 153 transitions. [2024-06-21 21:05:19,756 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45535714285714285 [2024-06-21 21:05:19,756 INFO L175 Difference]: Start difference. First operand has 320 places, 393 transitions, 4521 flow. Second operand 8 states and 153 transitions. [2024-06-21 21:05:19,756 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 327 places, 423 transitions, 5731 flow [2024-06-21 21:05:22,481 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 319 places, 423 transitions, 5677 flow, removed 3 selfloop flow, removed 8 redundant places. [2024-06-21 21:05:22,488 INFO L231 Difference]: Finished difference. Result has 320 places, 399 transitions, 4709 flow [2024-06-21 21:05:22,488 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4467, PETRI_DIFFERENCE_MINUEND_PLACES=312, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=393, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=351, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4709, PETRI_PLACES=320, PETRI_TRANSITIONS=399} [2024-06-21 21:05:22,488 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 277 predicate places. [2024-06-21 21:05:22,488 INFO L495 AbstractCegarLoop]: Abstraction has has 320 places, 399 transitions, 4709 flow [2024-06-21 21:05:22,489 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:05:22,489 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:05:22,489 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:05:22,489 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2024-06-21 21:05:22,489 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)] === [2024-06-21 21:05:22,489 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:05:22,490 INFO L85 PathProgramCache]: Analyzing trace with hash -2132179835, now seen corresponding path program 2 times [2024-06-21 21:05:22,490 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:05:22,490 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [237078114] [2024-06-21 21:05:22,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:05:22,490 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:05:22,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:05:23,374 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:05:23,374 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:05:23,374 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [237078114] [2024-06-21 21:05:23,374 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [237078114] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:05:23,374 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:05:23,374 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:05:23,374 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [514807690] [2024-06-21 21:05:23,374 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:05:23,374 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:05:23,375 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:05:23,375 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:05:23,375 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:05:23,481 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 21:05:23,481 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 320 places, 399 transitions, 4709 flow. Second operand has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:05:23,481 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:05:23,481 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 21:05:23,481 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:05:24,795 INFO L124 PetriNetUnfolderBase]: 3751/6047 cut-off events. [2024-06-21 21:05:24,795 INFO L125 PetriNetUnfolderBase]: For 988406/988406 co-relation queries the response was YES. [2024-06-21 21:05:24,856 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57514 conditions, 6047 events. 3751/6047 cut-off events. For 988406/988406 co-relation queries the response was YES. Maximal size of possible extension queue 360. Compared 37574 event pairs, 804 based on Foata normal form. 1/6038 useless extension candidates. Maximal degree in co-relation 57364. Up to 5711 conditions per place. [2024-06-21 21:05:24,883 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 364 selfloop transitions, 43 changer transitions 0/425 dead transitions. [2024-06-21 21:05:24,884 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 327 places, 425 transitions, 5691 flow [2024-06-21 21:05:24,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:05:24,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:05:24,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 148 transitions. [2024-06-21 21:05:24,884 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44047619047619047 [2024-06-21 21:05:24,884 INFO L175 Difference]: Start difference. First operand has 320 places, 399 transitions, 4709 flow. Second operand 8 states and 148 transitions. [2024-06-21 21:05:24,885 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 327 places, 425 transitions, 5691 flow [2024-06-21 21:05:27,367 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 324 places, 425 transitions, 5516 flow, removed 72 selfloop flow, removed 3 redundant places. [2024-06-21 21:05:27,372 INFO L231 Difference]: Finished difference. Result has 325 places, 405 transitions, 4742 flow [2024-06-21 21:05:27,372 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4572, PETRI_DIFFERENCE_MINUEND_PLACES=317, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=399, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=359, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4742, PETRI_PLACES=325, PETRI_TRANSITIONS=405} [2024-06-21 21:05:27,372 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 282 predicate places. [2024-06-21 21:05:27,372 INFO L495 AbstractCegarLoop]: Abstraction has has 325 places, 405 transitions, 4742 flow [2024-06-21 21:05:27,372 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:05:27,372 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:05:27,373 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:05:27,373 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2024-06-21 21:05:27,373 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)] === [2024-06-21 21:05:27,373 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:05:27,373 INFO L85 PathProgramCache]: Analyzing trace with hash -1447438571, now seen corresponding path program 1 times [2024-06-21 21:05:27,373 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:05:27,373 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1169193129] [2024-06-21 21:05:27,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:05:27,373 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:05:27,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:05:28,163 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:05:28,163 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:05:28,163 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1169193129] [2024-06-21 21:05:28,163 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1169193129] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:05:28,163 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:05:28,163 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:05:28,164 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1150204703] [2024-06-21 21:05:28,164 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:05:28,164 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:05:28,164 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:05:28,164 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:05:28,164 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:05:28,258 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 21:05:28,258 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 325 places, 405 transitions, 4742 flow. Second operand has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:05:28,258 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:05:28,258 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 21:05:28,258 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:05:29,663 INFO L124 PetriNetUnfolderBase]: 3761/6061 cut-off events. [2024-06-21 21:05:29,664 INFO L125 PetriNetUnfolderBase]: For 1011746/1011746 co-relation queries the response was YES. [2024-06-21 21:05:29,717 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57829 conditions, 6061 events. 3761/6061 cut-off events. For 1011746/1011746 co-relation queries the response was YES. Maximal size of possible extension queue 361. Compared 37633 event pairs, 800 based on Foata normal form. 2/6057 useless extension candidates. Maximal degree in co-relation 57677. Up to 5643 conditions per place. [2024-06-21 21:05:29,742 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 356 selfloop transitions, 56 changer transitions 0/430 dead transitions. [2024-06-21 21:05:29,742 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 332 places, 430 transitions, 5720 flow [2024-06-21 21:05:29,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:05:29,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:05:29,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 148 transitions. [2024-06-21 21:05:29,743 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44047619047619047 [2024-06-21 21:05:29,743 INFO L175 Difference]: Start difference. First operand has 325 places, 405 transitions, 4742 flow. Second operand 8 states and 148 transitions. [2024-06-21 21:05:29,743 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 332 places, 430 transitions, 5720 flow [2024-06-21 21:05:32,272 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 327 places, 430 transitions, 5610 flow, removed 15 selfloop flow, removed 5 redundant places. [2024-06-21 21:05:32,277 INFO L231 Difference]: Finished difference. Result has 328 places, 408 transitions, 4846 flow [2024-06-21 21:05:32,277 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4632, PETRI_DIFFERENCE_MINUEND_PLACES=320, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=405, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=349, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4846, PETRI_PLACES=328, PETRI_TRANSITIONS=408} [2024-06-21 21:05:32,277 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 285 predicate places. [2024-06-21 21:05:32,277 INFO L495 AbstractCegarLoop]: Abstraction has has 328 places, 408 transitions, 4846 flow [2024-06-21 21:05:32,278 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:05:32,278 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:05:32,278 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:05:32,278 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97 [2024-06-21 21:05:32,278 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)] === [2024-06-21 21:05:32,278 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:05:32,279 INFO L85 PathProgramCache]: Analyzing trace with hash -2022303683, now seen corresponding path program 1 times [2024-06-21 21:05:32,279 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:05:32,279 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1820724030] [2024-06-21 21:05:32,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:05:32,279 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:05:32,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:05:33,097 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:05:33,097 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:05:33,097 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1820724030] [2024-06-21 21:05:33,097 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1820724030] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:05:33,097 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:05:33,097 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:05:33,098 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1916511813] [2024-06-21 21:05:33,098 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:05:33,098 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:05:33,098 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:05:33,098 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:05:33,098 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:05:33,157 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 21:05:33,157 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 328 places, 408 transitions, 4846 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:05:33,157 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:05:33,157 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 21:05:33,157 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:05:34,592 INFO L124 PetriNetUnfolderBase]: 3886/6206 cut-off events. [2024-06-21 21:05:34,592 INFO L125 PetriNetUnfolderBase]: For 1042332/1042332 co-relation queries the response was YES. [2024-06-21 21:05:34,657 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59614 conditions, 6206 events. 3886/6206 cut-off events. For 1042332/1042332 co-relation queries the response was YES. Maximal size of possible extension queue 367. Compared 38132 event pairs, 834 based on Foata normal form. 2/6205 useless extension candidates. Maximal degree in co-relation 59461. Up to 5905 conditions per place. [2024-06-21 21:05:34,687 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 384 selfloop transitions, 60 changer transitions 0/448 dead transitions. [2024-06-21 21:05:34,687 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 336 places, 448 transitions, 6251 flow [2024-06-21 21:05:34,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:05:34,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:05:34,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 155 transitions. [2024-06-21 21:05:34,688 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41005291005291006 [2024-06-21 21:05:34,688 INFO L175 Difference]: Start difference. First operand has 328 places, 408 transitions, 4846 flow. Second operand 9 states and 155 transitions. [2024-06-21 21:05:34,688 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 336 places, 448 transitions, 6251 flow [2024-06-21 21:05:37,809 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 330 places, 448 transitions, 6073 flow, removed 38 selfloop flow, removed 6 redundant places. [2024-06-21 21:05:37,814 INFO L231 Difference]: Finished difference. Result has 335 places, 428 transitions, 5136 flow [2024-06-21 21:05:37,815 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4670, PETRI_DIFFERENCE_MINUEND_PLACES=322, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=408, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=354, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5136, PETRI_PLACES=335, PETRI_TRANSITIONS=428} [2024-06-21 21:05:37,815 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 292 predicate places. [2024-06-21 21:05:37,815 INFO L495 AbstractCegarLoop]: Abstraction has has 335 places, 428 transitions, 5136 flow [2024-06-21 21:05:37,815 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:05:37,815 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:05:37,815 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:05:37,815 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98 [2024-06-21 21:05:37,816 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)] === [2024-06-21 21:05:37,816 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:05:37,816 INFO L85 PathProgramCache]: Analyzing trace with hash -2022303869, now seen corresponding path program 2 times [2024-06-21 21:05:37,816 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:05:37,817 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1039353834] [2024-06-21 21:05:37,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:05:37,817 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:05:37,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:05:38,646 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:05:38,646 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:05:38,647 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1039353834] [2024-06-21 21:05:38,647 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1039353834] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:05:38,647 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:05:38,647 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:05:38,647 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [959555224] [2024-06-21 21:05:38,647 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:05:38,647 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:05:38,647 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:05:38,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:05:38,647 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:05:38,718 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 21:05:38,718 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 335 places, 428 transitions, 5136 flow. Second operand has 10 states, 10 states have (on average 11.5) internal successors, (115), 10 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) [2024-06-21 21:05:38,718 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:05:38,718 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 21:05:38,718 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:05:40,108 INFO L124 PetriNetUnfolderBase]: 3834/6164 cut-off events. [2024-06-21 21:05:40,109 INFO L125 PetriNetUnfolderBase]: For 1081827/1081827 co-relation queries the response was YES. [2024-06-21 21:05:40,169 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60808 conditions, 6164 events. 3834/6164 cut-off events. For 1081827/1081827 co-relation queries the response was YES. Maximal size of possible extension queue 371. Compared 38245 event pairs, 805 based on Foata normal form. 2/6164 useless extension candidates. Maximal degree in co-relation 60650. Up to 5636 conditions per place. [2024-06-21 21:05:40,196 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 349 selfloop transitions, 83 changer transitions 0/456 dead transitions. [2024-06-21 21:05:40,196 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 342 places, 456 transitions, 6474 flow [2024-06-21 21:05:40,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:05:40,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:05:40,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 151 transitions. [2024-06-21 21:05:40,197 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4494047619047619 [2024-06-21 21:05:40,197 INFO L175 Difference]: Start difference. First operand has 335 places, 428 transitions, 5136 flow. Second operand 8 states and 151 transitions. [2024-06-21 21:05:40,197 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 342 places, 456 transitions, 6474 flow [2024-06-21 21:05:43,488 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 340 places, 456 transitions, 6372 flow, removed 48 selfloop flow, removed 2 redundant places. [2024-06-21 21:05:43,494 INFO L231 Difference]: Finished difference. Result has 341 places, 434 transitions, 5393 flow [2024-06-21 21:05:43,495 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5034, PETRI_DIFFERENCE_MINUEND_PLACES=333, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=428, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=80, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=348, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5393, PETRI_PLACES=341, PETRI_TRANSITIONS=434} [2024-06-21 21:05:43,495 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 298 predicate places. [2024-06-21 21:05:43,495 INFO L495 AbstractCegarLoop]: Abstraction has has 341 places, 434 transitions, 5393 flow [2024-06-21 21:05:43,495 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.5) internal successors, (115), 10 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) [2024-06-21 21:05:43,495 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:05:43,495 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:05:43,496 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99 [2024-06-21 21:05:43,496 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)] === [2024-06-21 21:05:43,496 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:05:43,496 INFO L85 PathProgramCache]: Analyzing trace with hash 1111449543, now seen corresponding path program 3 times [2024-06-21 21:05:43,496 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:05:43,497 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [130675177] [2024-06-21 21:05:43,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:05:43,497 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:05:43,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:05:44,373 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:05:44,374 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:05:44,374 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [130675177] [2024-06-21 21:05:44,374 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [130675177] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:05:44,374 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:05:44,374 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:05:44,374 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [330496649] [2024-06-21 21:05:44,374 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:05:44,374 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:05:44,374 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:05:44,375 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:05:44,375 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:05:44,462 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 21:05:44,463 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 341 places, 434 transitions, 5393 flow. Second operand has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:05:44,463 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:05:44,463 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 21:05:44,463 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:05:45,945 INFO L124 PetriNetUnfolderBase]: 3837/6169 cut-off events. [2024-06-21 21:05:45,945 INFO L125 PetriNetUnfolderBase]: For 1102854/1102854 co-relation queries the response was YES. [2024-06-21 21:05:46,009 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61588 conditions, 6169 events. 3837/6169 cut-off events. For 1102854/1102854 co-relation queries the response was YES. Maximal size of possible extension queue 373. Compared 38285 event pairs, 804 based on Foata normal form. 1/6168 useless extension candidates. Maximal degree in co-relation 61428. Up to 5819 conditions per place. [2024-06-21 21:05:46,037 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 387 selfloop transitions, 41 changer transitions 0/452 dead transitions. [2024-06-21 21:05:46,037 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 348 places, 452 transitions, 6339 flow [2024-06-21 21:05:46,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:05:46,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:05:46,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 143 transitions. [2024-06-21 21:05:46,038 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4255952380952381 [2024-06-21 21:05:46,039 INFO L175 Difference]: Start difference. First operand has 341 places, 434 transitions, 5393 flow. Second operand 8 states and 143 transitions. [2024-06-21 21:05:46,039 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 348 places, 452 transitions, 6339 flow [2024-06-21 21:05:48,705 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 344 places, 452 transitions, 6178 flow, removed 53 selfloop flow, removed 4 redundant places. [2024-06-21 21:05:48,711 INFO L231 Difference]: Finished difference. Result has 345 places, 437 transitions, 5374 flow [2024-06-21 21:05:48,711 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5232, PETRI_DIFFERENCE_MINUEND_PLACES=337, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=434, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=393, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5374, PETRI_PLACES=345, PETRI_TRANSITIONS=437} [2024-06-21 21:05:48,711 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 302 predicate places. [2024-06-21 21:05:48,711 INFO L495 AbstractCegarLoop]: Abstraction has has 345 places, 437 transitions, 5374 flow [2024-06-21 21:05:48,711 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:05:48,711 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:05:48,712 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:05:48,712 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100 [2024-06-21 21:05:48,712 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)] === [2024-06-21 21:05:48,712 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:05:48,712 INFO L85 PathProgramCache]: Analyzing trace with hash 1111807035, now seen corresponding path program 2 times [2024-06-21 21:05:48,712 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:05:48,712 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [843420031] [2024-06-21 21:05:48,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:05:48,712 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:05:48,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:05:49,487 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:05:49,487 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:05:49,487 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [843420031] [2024-06-21 21:05:49,487 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [843420031] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:05:49,487 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:05:49,487 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:05:49,487 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1293271743] [2024-06-21 21:05:49,488 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:05:49,488 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:05:49,488 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:05:49,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:05:49,488 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:05:49,545 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 21:05:49,545 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 345 places, 437 transitions, 5374 flow. Second operand has 10 states, 10 states have (on average 10.5) internal successors, (105), 10 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:05:49,545 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:05:49,545 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 21:05:49,545 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:05:51,153 INFO L124 PetriNetUnfolderBase]: 3937/6279 cut-off events. [2024-06-21 21:05:51,153 INFO L125 PetriNetUnfolderBase]: For 1134655/1134655 co-relation queries the response was YES. [2024-06-21 21:05:51,210 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62382 conditions, 6279 events. 3937/6279 cut-off events. For 1134655/1134655 co-relation queries the response was YES. Maximal size of possible extension queue 377. Compared 38568 event pairs, 833 based on Foata normal form. 4/6281 useless extension candidates. Maximal degree in co-relation 62220. Up to 6055 conditions per place. [2024-06-21 21:05:51,235 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 408 selfloop transitions, 48 changer transitions 0/460 dead transitions. [2024-06-21 21:05:51,235 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 352 places, 460 transitions, 6476 flow [2024-06-21 21:05:51,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:05:51,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:05:51,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 137 transitions. [2024-06-21 21:05:51,236 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40773809523809523 [2024-06-21 21:05:51,236 INFO L175 Difference]: Start difference. First operand has 345 places, 437 transitions, 5374 flow. Second operand 8 states and 137 transitions. [2024-06-21 21:05:51,236 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 352 places, 460 transitions, 6476 flow [2024-06-21 21:05:54,262 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 346 places, 460 transitions, 6352 flow, removed 18 selfloop flow, removed 6 redundant places. [2024-06-21 21:05:54,268 INFO L231 Difference]: Finished difference. Result has 347 places, 444 transitions, 5502 flow [2024-06-21 21:05:54,268 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5250, PETRI_DIFFERENCE_MINUEND_PLACES=339, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=437, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=390, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5502, PETRI_PLACES=347, PETRI_TRANSITIONS=444} [2024-06-21 21:05:54,268 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 304 predicate places. [2024-06-21 21:05:54,268 INFO L495 AbstractCegarLoop]: Abstraction has has 347 places, 444 transitions, 5502 flow [2024-06-21 21:05:54,268 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.5) internal successors, (105), 10 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:05:54,268 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:05:54,268 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:05:54,269 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101 [2024-06-21 21:05:54,269 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)] === [2024-06-21 21:05:54,269 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:05:54,269 INFO L85 PathProgramCache]: Analyzing trace with hash -1845172349, now seen corresponding path program 3 times [2024-06-21 21:05:54,269 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:05:54,269 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [520824413] [2024-06-21 21:05:54,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:05:54,269 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:05:54,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:05:55,084 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:05:55,084 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:05:55,084 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [520824413] [2024-06-21 21:05:55,085 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [520824413] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:05:55,085 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:05:55,085 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:05:55,085 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1868973122] [2024-06-21 21:05:55,085 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:05:55,085 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:05:55,085 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:05:55,085 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:05:55,085 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:05:55,196 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 21:05:55,197 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 347 places, 444 transitions, 5502 flow. Second operand has 10 states, 10 states have (on average 11.5) internal successors, (115), 10 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) [2024-06-21 21:05:55,197 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:05:55,197 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 21:05:55,197 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:05:56,643 INFO L124 PetriNetUnfolderBase]: 3863/6211 cut-off events. [2024-06-21 21:05:56,643 INFO L125 PetriNetUnfolderBase]: For 1150397/1150397 co-relation queries the response was YES. [2024-06-21 21:05:56,709 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62688 conditions, 6211 events. 3863/6211 cut-off events. For 1150397/1150397 co-relation queries the response was YES. Maximal size of possible extension queue 379. Compared 38576 event pairs, 804 based on Foata normal form. 2/6211 useless extension candidates. Maximal degree in co-relation 62525. Up to 5859 conditions per place. [2024-06-21 21:05:56,736 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 396 selfloop transitions, 42 changer transitions 0/464 dead transitions. [2024-06-21 21:05:56,737 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 354 places, 464 transitions, 6522 flow [2024-06-21 21:05:56,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:05:56,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:05:56,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 143 transitions. [2024-06-21 21:05:56,738 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4255952380952381 [2024-06-21 21:05:56,738 INFO L175 Difference]: Start difference. First operand has 347 places, 444 transitions, 5502 flow. Second operand 8 states and 143 transitions. [2024-06-21 21:05:56,738 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 354 places, 464 transitions, 6522 flow [2024-06-21 21:06:00,354 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 350 places, 464 transitions, 6356 flow, removed 54 selfloop flow, removed 4 redundant places. [2024-06-21 21:06:00,359 INFO L231 Difference]: Finished difference. Result has 351 places, 447 transitions, 5508 flow [2024-06-21 21:06:00,359 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5336, PETRI_DIFFERENCE_MINUEND_PLACES=343, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=444, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=402, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5508, PETRI_PLACES=351, PETRI_TRANSITIONS=447} [2024-06-21 21:06:00,360 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 308 predicate places. [2024-06-21 21:06:00,360 INFO L495 AbstractCegarLoop]: Abstraction has has 351 places, 447 transitions, 5508 flow [2024-06-21 21:06:00,360 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.5) internal successors, (115), 10 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) [2024-06-21 21:06:00,360 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:06:00,360 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:06:00,360 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102 [2024-06-21 21:06:00,360 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)] === [2024-06-21 21:06:00,360 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:06:00,360 INFO L85 PathProgramCache]: Analyzing trace with hash 1111569885, now seen corresponding path program 3 times [2024-06-21 21:06:00,361 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:06:00,361 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [528701668] [2024-06-21 21:06:00,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:06:00,361 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:06:00,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:06:01,174 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:06:01,174 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:06:01,174 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [528701668] [2024-06-21 21:06:01,175 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [528701668] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:06:01,175 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:06:01,175 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:06:01,175 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [183332548] [2024-06-21 21:06:01,175 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:06:01,175 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:06:01,175 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:06:01,175 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:06:01,175 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:06:01,282 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 21:06:01,282 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 351 places, 447 transitions, 5508 flow. Second operand has 10 states, 10 states have (on average 10.5) internal successors, (105), 10 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:06:01,282 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:06:01,282 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 21:06:01,283 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:06:02,702 INFO L124 PetriNetUnfolderBase]: 3967/6327 cut-off events. [2024-06-21 21:06:02,702 INFO L125 PetriNetUnfolderBase]: For 1179089/1179089 co-relation queries the response was YES. [2024-06-21 21:06:02,768 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63554 conditions, 6327 events. 3967/6327 cut-off events. For 1179089/1179089 co-relation queries the response was YES. Maximal size of possible extension queue 383. Compared 38956 event pairs, 831 based on Foata normal form. 4/6329 useless extension candidates. Maximal degree in co-relation 63390. Up to 6059 conditions per place. [2024-06-21 21:06:02,796 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 406 selfloop transitions, 60 changer transitions 0/470 dead transitions. [2024-06-21 21:06:02,796 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 358 places, 470 transitions, 6645 flow [2024-06-21 21:06:02,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:06:02,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:06:02,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 140 transitions. [2024-06-21 21:06:02,797 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4166666666666667 [2024-06-21 21:06:02,797 INFO L175 Difference]: Start difference. First operand has 351 places, 447 transitions, 5508 flow. Second operand 8 states and 140 transitions. [2024-06-21 21:06:02,797 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 358 places, 470 transitions, 6645 flow [2024-06-21 21:06:05,157 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 352 places, 470 transitions, 6505 flow, removed 31 selfloop flow, removed 6 redundant places. [2024-06-21 21:06:05,163 INFO L231 Difference]: Finished difference. Result has 353 places, 453 transitions, 5646 flow [2024-06-21 21:06:05,163 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5368, PETRI_DIFFERENCE_MINUEND_PLACES=345, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=447, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=387, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5646, PETRI_PLACES=353, PETRI_TRANSITIONS=453} [2024-06-21 21:06:05,163 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 310 predicate places. [2024-06-21 21:06:05,163 INFO L495 AbstractCegarLoop]: Abstraction has has 353 places, 453 transitions, 5646 flow [2024-06-21 21:06:05,163 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.5) internal successors, (105), 10 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:06:05,163 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:06:05,163 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:06:05,163 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103 [2024-06-21 21:06:05,164 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)] === [2024-06-21 21:06:05,164 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:06:05,164 INFO L85 PathProgramCache]: Analyzing trace with hash -2140753691, now seen corresponding path program 1 times [2024-06-21 21:06:05,164 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:06:05,164 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [196194552] [2024-06-21 21:06:05,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:06:05,164 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:06:05,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:06:06,136 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:06:06,136 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:06:06,136 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [196194552] [2024-06-21 21:06:06,136 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [196194552] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:06:06,136 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:06:06,136 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:06:06,136 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1697024502] [2024-06-21 21:06:06,136 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:06:06,137 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:06:06,137 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:06:06,137 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:06:06,138 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:06:06,283 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 21:06:06,283 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 353 places, 453 transitions, 5646 flow. Second operand has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:06:06,283 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:06:06,283 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 21:06:06,283 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:06:07,811 INFO L124 PetriNetUnfolderBase]: 3893/6253 cut-off events. [2024-06-21 21:06:07,812 INFO L125 PetriNetUnfolderBase]: For 1194949/1194949 co-relation queries the response was YES. [2024-06-21 21:06:07,875 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63806 conditions, 6253 events. 3893/6253 cut-off events. For 1194949/1194949 co-relation queries the response was YES. Maximal size of possible extension queue 387. Compared 38829 event pairs, 674 based on Foata normal form. 2/6253 useless extension candidates. Maximal degree in co-relation 63641. Up to 5837 conditions per place. [2024-06-21 21:06:07,900 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 410 selfloop transitions, 45 changer transitions 0/483 dead transitions. [2024-06-21 21:06:07,901 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 360 places, 483 transitions, 6930 flow [2024-06-21 21:06:07,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:06:07,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:06:07,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 153 transitions. [2024-06-21 21:06:07,902 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45535714285714285 [2024-06-21 21:06:07,902 INFO L175 Difference]: Start difference. First operand has 353 places, 453 transitions, 5646 flow. Second operand 8 states and 153 transitions. [2024-06-21 21:06:07,902 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 360 places, 483 transitions, 6930 flow [2024-06-21 21:06:11,224 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 354 places, 483 transitions, 6711 flow, removed 54 selfloop flow, removed 6 redundant places. [2024-06-21 21:06:11,229 INFO L231 Difference]: Finished difference. Result has 355 places, 457 transitions, 5618 flow [2024-06-21 21:06:11,229 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5427, PETRI_DIFFERENCE_MINUEND_PLACES=347, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=453, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=410, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5618, PETRI_PLACES=355, PETRI_TRANSITIONS=457} [2024-06-21 21:06:11,230 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 312 predicate places. [2024-06-21 21:06:11,230 INFO L495 AbstractCegarLoop]: Abstraction has has 355 places, 457 transitions, 5618 flow [2024-06-21 21:06:11,230 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:06:11,230 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:06:11,230 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:06:11,230 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104 [2024-06-21 21:06:11,230 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)] === [2024-06-21 21:06:11,230 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:06:11,230 INFO L85 PathProgramCache]: Analyzing trace with hash 816227367, now seen corresponding path program 2 times [2024-06-21 21:06:11,230 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:06:11,230 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1817124921] [2024-06-21 21:06:11,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:06:11,231 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:06:11,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:06:12,241 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:06:12,242 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:06:12,242 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1817124921] [2024-06-21 21:06:12,242 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1817124921] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:06:12,242 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:06:12,242 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:06:12,242 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1112960638] [2024-06-21 21:06:12,242 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:06:12,242 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:06:12,242 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:06:12,243 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:06:12,243 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:06:12,342 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 21:06:12,342 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 355 places, 457 transitions, 5618 flow. Second operand has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:06:12,342 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:06:12,342 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 21:06:12,342 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:06:14,010 INFO L124 PetriNetUnfolderBase]: 3900/6268 cut-off events. [2024-06-21 21:06:14,010 INFO L125 PetriNetUnfolderBase]: For 1215988/1215988 co-relation queries the response was YES. [2024-06-21 21:06:14,068 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64075 conditions, 6268 events. 3900/6268 cut-off events. For 1215988/1215988 co-relation queries the response was YES. Maximal size of possible extension queue 388. Compared 39050 event pairs, 810 based on Foata normal form. 2/6268 useless extension candidates. Maximal degree in co-relation 63909. Up to 5895 conditions per place. [2024-06-21 21:06:14,093 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 410 selfloop transitions, 42 changer transitions 0/480 dead transitions. [2024-06-21 21:06:14,093 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 362 places, 480 transitions, 6632 flow [2024-06-21 21:06:14,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:06:14,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:06:14,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 148 transitions. [2024-06-21 21:06:14,094 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44047619047619047 [2024-06-21 21:06:14,094 INFO L175 Difference]: Start difference. First operand has 355 places, 457 transitions, 5618 flow. Second operand 8 states and 148 transitions. [2024-06-21 21:06:14,094 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 362 places, 480 transitions, 6632 flow [2024-06-21 21:06:17,544 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 358 places, 480 transitions, 6499 flow, removed 41 selfloop flow, removed 4 redundant places. [2024-06-21 21:06:17,550 INFO L231 Difference]: Finished difference. Result has 359 places, 459 transitions, 5628 flow [2024-06-21 21:06:17,550 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5505, PETRI_DIFFERENCE_MINUEND_PLACES=351, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=457, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=415, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5628, PETRI_PLACES=359, PETRI_TRANSITIONS=459} [2024-06-21 21:06:17,550 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 316 predicate places. [2024-06-21 21:06:17,551 INFO L495 AbstractCegarLoop]: Abstraction has has 359 places, 459 transitions, 5628 flow [2024-06-21 21:06:17,551 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:06:17,551 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:06:17,551 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:06:17,551 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105 [2024-06-21 21:06:17,551 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)] === [2024-06-21 21:06:17,552 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:06:17,552 INFO L85 PathProgramCache]: Analyzing trace with hash 1111446567, now seen corresponding path program 3 times [2024-06-21 21:06:17,552 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:06:17,552 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [456728881] [2024-06-21 21:06:17,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:06:17,552 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:06:17,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:06:18,711 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:06:18,711 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:06:18,711 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [456728881] [2024-06-21 21:06:18,712 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [456728881] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:06:18,712 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:06:18,712 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:06:18,712 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [951781465] [2024-06-21 21:06:18,712 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:06:18,712 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:06:18,712 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:06:18,713 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:06:18,713 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:06:18,821 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 21:06:18,821 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 359 places, 459 transitions, 5628 flow. Second operand has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:06:18,821 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:06:18,821 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 21:06:18,821 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:06:20,590 INFO L124 PetriNetUnfolderBase]: 3907/6277 cut-off events. [2024-06-21 21:06:20,591 INFO L125 PetriNetUnfolderBase]: For 1236856/1236856 co-relation queries the response was YES. [2024-06-21 21:06:20,651 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64267 conditions, 6277 events. 3907/6277 cut-off events. For 1236856/1236856 co-relation queries the response was YES. Maximal size of possible extension queue 389. Compared 39090 event pairs, 808 based on Foata normal form. 2/6277 useless extension candidates. Maximal degree in co-relation 64099. Up to 5906 conditions per place. [2024-06-21 21:06:20,676 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 409 selfloop transitions, 40 changer transitions 0/477 dead transitions. [2024-06-21 21:06:20,676 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 366 places, 477 transitions, 6604 flow [2024-06-21 21:06:20,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:06:20,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:06:20,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 143 transitions. [2024-06-21 21:06:20,677 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4255952380952381 [2024-06-21 21:06:20,677 INFO L175 Difference]: Start difference. First operand has 359 places, 459 transitions, 5628 flow. Second operand 8 states and 143 transitions. [2024-06-21 21:06:20,677 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 366 places, 477 transitions, 6604 flow [2024-06-21 21:06:22,917 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 360 places, 477 transitions, 6501 flow, removed 11 selfloop flow, removed 6 redundant places. [2024-06-21 21:06:22,922 INFO L231 Difference]: Finished difference. Result has 361 places, 461 transitions, 5648 flow [2024-06-21 21:06:22,923 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5525, PETRI_DIFFERENCE_MINUEND_PLACES=353, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=459, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=419, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5648, PETRI_PLACES=361, PETRI_TRANSITIONS=461} [2024-06-21 21:06:22,923 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 318 predicate places. [2024-06-21 21:06:22,923 INFO L495 AbstractCegarLoop]: Abstraction has has 361 places, 461 transitions, 5648 flow [2024-06-21 21:06:22,923 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:06:22,923 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:06:22,923 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:06:22,923 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106 [2024-06-21 21:06:22,923 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)] === [2024-06-21 21:06:22,924 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:06:22,924 INFO L85 PathProgramCache]: Analyzing trace with hash -1844926085, now seen corresponding path program 1 times [2024-06-21 21:06:22,924 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:06:22,924 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1317422301] [2024-06-21 21:06:22,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:06:22,924 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:06:22,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:06:23,893 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:06:23,893 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:06:23,893 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1317422301] [2024-06-21 21:06:23,893 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1317422301] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:06:23,893 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:06:23,893 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 21:06:23,893 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [502421506] [2024-06-21 21:06:23,893 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:06:23,894 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 21:06:23,894 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:06:23,894 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 21:06:23,894 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2024-06-21 21:06:23,986 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 21:06:23,986 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 361 places, 461 transitions, 5648 flow. Second operand has 11 states, 11 states have (on average 10.454545454545455) internal successors, (115), 11 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) [2024-06-21 21:06:23,987 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:06:23,987 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 21:06:23,987 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:06:25,732 INFO L124 PetriNetUnfolderBase]: 4011/6393 cut-off events. [2024-06-21 21:06:25,732 INFO L125 PetriNetUnfolderBase]: For 1267475/1267475 co-relation queries the response was YES. [2024-06-21 21:06:25,802 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65183 conditions, 6393 events. 4011/6393 cut-off events. For 1267475/1267475 co-relation queries the response was YES. Maximal size of possible extension queue 392. Compared 39390 event pairs, 842 based on Foata normal form. 4/6395 useless extension candidates. Maximal degree in co-relation 65014. Up to 6026 conditions per place. [2024-06-21 21:06:25,829 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 416 selfloop transitions, 69 changer transitions 0/489 dead transitions. [2024-06-21 21:06:25,829 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 369 places, 489 transitions, 7068 flow [2024-06-21 21:06:25,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:06:25,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:06:25,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 162 transitions. [2024-06-21 21:06:25,830 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-21 21:06:25,830 INFO L175 Difference]: Start difference. First operand has 361 places, 461 transitions, 5648 flow. Second operand 9 states and 162 transitions. [2024-06-21 21:06:25,830 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 369 places, 489 transitions, 7068 flow [2024-06-21 21:06:28,049 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 363 places, 489 transitions, 6965 flow, removed 13 selfloop flow, removed 6 redundant places. [2024-06-21 21:06:28,054 INFO L231 Difference]: Finished difference. Result has 364 places, 467 transitions, 5835 flow [2024-06-21 21:06:28,055 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5545, PETRI_DIFFERENCE_MINUEND_PLACES=355, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=461, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=395, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5835, PETRI_PLACES=364, PETRI_TRANSITIONS=467} [2024-06-21 21:06:28,055 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 321 predicate places. [2024-06-21 21:06:28,055 INFO L495 AbstractCegarLoop]: Abstraction has has 364 places, 467 transitions, 5835 flow [2024-06-21 21:06:28,055 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.454545454545455) internal successors, (115), 11 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) [2024-06-21 21:06:28,055 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:06:28,055 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:06:28,055 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107 [2024-06-21 21:06:28,055 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)] === [2024-06-21 21:06:28,056 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:06:28,056 INFO L85 PathProgramCache]: Analyzing trace with hash 435949623, now seen corresponding path program 4 times [2024-06-21 21:06:28,056 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:06:28,056 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1280509698] [2024-06-21 21:06:28,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:06:28,056 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:06:28,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:06:28,880 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:06:28,881 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:06:28,881 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1280509698] [2024-06-21 21:06:28,881 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1280509698] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:06:28,881 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:06:28,881 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:06:28,881 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1020050089] [2024-06-21 21:06:28,881 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:06:28,881 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:06:28,881 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:06:28,882 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:06:28,882 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:06:28,984 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 21:06:28,984 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 364 places, 467 transitions, 5835 flow. Second operand has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:06:28,984 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:06:28,984 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 21:06:28,984 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:06:30,456 INFO L124 PetriNetUnfolderBase]: 3937/6318 cut-off events. [2024-06-21 21:06:30,456 INFO L125 PetriNetUnfolderBase]: For 1286005/1286007 co-relation queries the response was YES. [2024-06-21 21:06:30,522 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65536 conditions, 6318 events. 3937/6318 cut-off events. For 1286005/1286007 co-relation queries the response was YES. Maximal size of possible extension queue 394. Compared 39278 event pairs, 810 based on Foata normal form. 4/6319 useless extension candidates. Maximal degree in co-relation 65366. Up to 5800 conditions per place. [2024-06-21 21:06:30,549 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 389 selfloop transitions, 73 changer transitions 0/490 dead transitions. [2024-06-21 21:06:30,549 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 371 places, 490 transitions, 6933 flow [2024-06-21 21:06:30,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:06:30,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:06:30,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 150 transitions. [2024-06-21 21:06:30,550 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44642857142857145 [2024-06-21 21:06:30,550 INFO L175 Difference]: Start difference. First operand has 364 places, 467 transitions, 5835 flow. Second operand 8 states and 150 transitions. [2024-06-21 21:06:30,550 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 371 places, 490 transitions, 6933 flow [2024-06-21 21:06:32,700 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 366 places, 490 transitions, 6816 flow, removed 33 selfloop flow, removed 5 redundant places. [2024-06-21 21:06:32,705 INFO L231 Difference]: Finished difference. Result has 367 places, 470 transitions, 5982 flow [2024-06-21 21:06:32,705 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5718, PETRI_DIFFERENCE_MINUEND_PLACES=359, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=467, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=394, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5982, PETRI_PLACES=367, PETRI_TRANSITIONS=470} [2024-06-21 21:06:32,705 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 324 predicate places. [2024-06-21 21:06:32,705 INFO L495 AbstractCegarLoop]: Abstraction has has 367 places, 470 transitions, 5982 flow [2024-06-21 21:06:32,705 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:06:32,705 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:06:32,705 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:06:32,705 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108 [2024-06-21 21:06:32,706 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)] === [2024-06-21 21:06:32,706 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:06:32,706 INFO L85 PathProgramCache]: Analyzing trace with hash 697362307, now seen corresponding path program 5 times [2024-06-21 21:06:32,706 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:06:32,706 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2074872138] [2024-06-21 21:06:32,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:06:32,706 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:06:32,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:06:33,575 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:06:33,575 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:06:33,575 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2074872138] [2024-06-21 21:06:33,575 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2074872138] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:06:33,575 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:06:33,575 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:06:33,575 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [390119853] [2024-06-21 21:06:33,575 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:06:33,575 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:06:33,576 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:06:33,576 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:06:33,576 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:06:33,649 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 21:06:33,649 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 367 places, 470 transitions, 5982 flow. Second operand has 10 states, 10 states have (on average 11.5) internal successors, (115), 10 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) [2024-06-21 21:06:33,649 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:06:33,649 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 21:06:33,649 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:06:35,067 INFO L124 PetriNetUnfolderBase]: 3973/6367 cut-off events. [2024-06-21 21:06:35,067 INFO L125 PetriNetUnfolderBase]: For 1333212/1333214 co-relation queries the response was YES. [2024-06-21 21:06:35,137 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67258 conditions, 6367 events. 3973/6367 cut-off events. For 1333212/1333214 co-relation queries the response was YES. Maximal size of possible extension queue 401. Compared 39598 event pairs, 811 based on Foata normal form. 4/6368 useless extension candidates. Maximal degree in co-relation 67086. Up to 5652 conditions per place. [2024-06-21 21:06:35,165 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 357 selfloop transitions, 117 changer transitions 0/502 dead transitions. [2024-06-21 21:06:35,165 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 374 places, 502 transitions, 8022 flow [2024-06-21 21:06:35,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:06:35,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:06:35,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 154 transitions. [2024-06-21 21:06:35,166 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4583333333333333 [2024-06-21 21:06:35,166 INFO L175 Difference]: Start difference. First operand has 367 places, 470 transitions, 5982 flow. Second operand 8 states and 154 transitions. [2024-06-21 21:06:35,166 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 374 places, 502 transitions, 8022 flow [2024-06-21 21:06:38,330 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 368 places, 502 transitions, 7784 flow, removed 49 selfloop flow, removed 6 redundant places. [2024-06-21 21:06:38,335 INFO L231 Difference]: Finished difference. Result has 369 places, 479 transitions, 6320 flow [2024-06-21 21:06:38,335 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5744, PETRI_DIFFERENCE_MINUEND_PLACES=361, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=470, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=111, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=359, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6320, PETRI_PLACES=369, PETRI_TRANSITIONS=479} [2024-06-21 21:06:38,335 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 326 predicate places. [2024-06-21 21:06:38,335 INFO L495 AbstractCegarLoop]: Abstraction has has 369 places, 479 transitions, 6320 flow [2024-06-21 21:06:38,335 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.5) internal successors, (115), 10 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) [2024-06-21 21:06:38,335 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:06:38,336 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:06:38,336 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109 [2024-06-21 21:06:38,336 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)] === [2024-06-21 21:06:38,336 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:06:38,336 INFO L85 PathProgramCache]: Analyzing trace with hash 436069779, now seen corresponding path program 4 times [2024-06-21 21:06:38,336 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:06:38,336 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [236723486] [2024-06-21 21:06:38,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:06:38,337 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:06:38,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:06:39,185 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:06:39,186 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:06:39,186 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [236723486] [2024-06-21 21:06:39,186 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [236723486] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:06:39,186 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:06:39,186 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:06:39,186 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1602013649] [2024-06-21 21:06:39,186 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:06:39,186 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:06:39,186 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:06:39,186 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:06:39,186 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:06:39,257 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 21:06:39,258 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 369 places, 479 transitions, 6320 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:06:39,258 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:06:39,258 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 21:06:39,258 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:06:40,870 INFO L124 PetriNetUnfolderBase]: 4089/6498 cut-off events. [2024-06-21 21:06:40,870 INFO L125 PetriNetUnfolderBase]: For 1380244/1380246 co-relation queries the response was YES. [2024-06-21 21:06:40,939 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69289 conditions, 6498 events. 4089/6498 cut-off events. For 1380244/1380246 co-relation queries the response was YES. Maximal size of possible extension queue 405. Compared 39943 event pairs, 847 based on Foata normal form. 4/6499 useless extension candidates. Maximal degree in co-relation 69116. Up to 6034 conditions per place. [2024-06-21 21:06:40,969 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 398 selfloop transitions, 108 changer transitions 0/510 dead transitions. [2024-06-21 21:06:40,969 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 377 places, 510 transitions, 8160 flow [2024-06-21 21:06:40,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:06:40,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:06:40,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 157 transitions. [2024-06-21 21:06:40,970 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41534391534391535 [2024-06-21 21:06:40,970 INFO L175 Difference]: Start difference. First operand has 369 places, 479 transitions, 6320 flow. Second operand 9 states and 157 transitions. [2024-06-21 21:06:40,971 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 377 places, 510 transitions, 8160 flow [2024-06-21 21:06:44,106 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 374 places, 510 transitions, 7888 flow, removed 90 selfloop flow, removed 3 redundant places. [2024-06-21 21:06:44,111 INFO L231 Difference]: Finished difference. Result has 375 places, 488 transitions, 6558 flow [2024-06-21 21:06:44,111 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6048, PETRI_DIFFERENCE_MINUEND_PLACES=366, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=479, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=102, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=377, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6558, PETRI_PLACES=375, PETRI_TRANSITIONS=488} [2024-06-21 21:06:44,111 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 332 predicate places. [2024-06-21 21:06:44,112 INFO L495 AbstractCegarLoop]: Abstraction has has 375 places, 488 transitions, 6558 flow [2024-06-21 21:06:44,112 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:06:44,112 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:06:44,112 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:06:44,112 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110 [2024-06-21 21:06:44,112 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)] === [2024-06-21 21:06:44,112 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:06:44,112 INFO L85 PathProgramCache]: Analyzing trace with hash 925143487, now seen corresponding path program 6 times [2024-06-21 21:06:44,112 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:06:44,112 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1279533013] [2024-06-21 21:06:44,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:06:44,113 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:06:44,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:06:44,946 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:06:44,946 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:06:44,946 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1279533013] [2024-06-21 21:06:44,946 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1279533013] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:06:44,946 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:06:44,946 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:06:44,947 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1318456950] [2024-06-21 21:06:44,947 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:06:44,947 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:06:44,947 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:06:44,947 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:06:44,947 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:06:45,044 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 21:06:45,044 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 375 places, 488 transitions, 6558 flow. Second operand has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:06:45,044 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:06:45,044 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 21:06:45,044 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:06:46,949 INFO L124 PetriNetUnfolderBase]: 4014/6433 cut-off events. [2024-06-21 21:06:46,949 INFO L125 PetriNetUnfolderBase]: For 1410043/1410045 co-relation queries the response was YES. [2024-06-21 21:06:47,009 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69536 conditions, 6433 events. 4014/6433 cut-off events. For 1410043/1410045 co-relation queries the response was YES. Maximal size of possible extension queue 407. Compared 40075 event pairs, 821 based on Foata normal form. 4/6434 useless extension candidates. Maximal degree in co-relation 69361. Up to 5854 conditions per place. [2024-06-21 21:06:47,036 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 395 selfloop transitions, 90 changer transitions 0/516 dead transitions. [2024-06-21 21:06:47,036 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 384 places, 516 transitions, 7934 flow [2024-06-21 21:06:47,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 21:06:47,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 21:06:47,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 181 transitions. [2024-06-21 21:06:47,037 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.430952380952381 [2024-06-21 21:06:47,037 INFO L175 Difference]: Start difference. First operand has 375 places, 488 transitions, 6558 flow. Second operand 10 states and 181 transitions. [2024-06-21 21:06:47,037 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 384 places, 516 transitions, 7934 flow [2024-06-21 21:06:50,978 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 380 places, 516 transitions, 7686 flow, removed 103 selfloop flow, removed 4 redundant places. [2024-06-21 21:06:50,983 INFO L231 Difference]: Finished difference. Result has 382 places, 491 transitions, 6587 flow [2024-06-21 21:06:50,983 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6310, PETRI_DIFFERENCE_MINUEND_PLACES=371, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=488, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=87, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=398, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6587, PETRI_PLACES=382, PETRI_TRANSITIONS=491} [2024-06-21 21:06:50,984 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 339 predicate places. [2024-06-21 21:06:50,984 INFO L495 AbstractCegarLoop]: Abstraction has has 382 places, 491 transitions, 6587 flow [2024-06-21 21:06:50,984 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:06:50,984 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:06:50,984 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:06:50,984 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111 [2024-06-21 21:06:50,984 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)] === [2024-06-21 21:06:50,984 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:06:50,984 INFO L85 PathProgramCache]: Analyzing trace with hash 1047393847, now seen corresponding path program 7 times [2024-06-21 21:06:50,985 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:06:50,985 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1750798321] [2024-06-21 21:06:50,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:06:50,985 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:06:50,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:06:51,808 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:06:51,808 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:06:51,808 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1750798321] [2024-06-21 21:06:51,808 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1750798321] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:06:51,809 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:06:51,809 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:06:51,809 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [439954124] [2024-06-21 21:06:51,809 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:06:51,809 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:06:51,809 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:06:51,809 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:06:51,809 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:06:51,894 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 21:06:51,895 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 382 places, 491 transitions, 6587 flow. Second operand has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:06:51,895 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:06:51,895 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 21:06:51,895 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:06:53,486 INFO L124 PetriNetUnfolderBase]: 4009/6420 cut-off events. [2024-06-21 21:06:53,486 INFO L125 PetriNetUnfolderBase]: For 1417851/1417853 co-relation queries the response was YES. [2024-06-21 21:06:53,558 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69420 conditions, 6420 events. 4009/6420 cut-off events. For 1417851/1417853 co-relation queries the response was YES. Maximal size of possible extension queue 407. Compared 39941 event pairs, 816 based on Foata normal form. 4/6421 useless extension candidates. Maximal degree in co-relation 69242. Up to 5848 conditions per place. [2024-06-21 21:06:53,587 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 389 selfloop transitions, 89 changer transitions 0/509 dead transitions. [2024-06-21 21:06:53,587 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 389 places, 509 transitions, 7617 flow [2024-06-21 21:06:53,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:06:53,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:06:53,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 147 transitions. [2024-06-21 21:06:53,588 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4375 [2024-06-21 21:06:53,588 INFO L175 Difference]: Start difference. First operand has 382 places, 491 transitions, 6587 flow. Second operand 8 states and 147 transitions. [2024-06-21 21:06:53,588 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 389 places, 509 transitions, 7617 flow [2024-06-21 21:06:57,736 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 381 places, 509 transitions, 7352 flow, removed 39 selfloop flow, removed 8 redundant places. [2024-06-21 21:06:57,741 INFO L231 Difference]: Finished difference. Result has 382 places, 491 transitions, 6506 flow [2024-06-21 21:06:57,741 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6322, PETRI_DIFFERENCE_MINUEND_PLACES=374, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=491, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=89, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=402, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6506, PETRI_PLACES=382, PETRI_TRANSITIONS=491} [2024-06-21 21:06:57,741 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 339 predicate places. [2024-06-21 21:06:57,742 INFO L495 AbstractCegarLoop]: Abstraction has has 382 places, 491 transitions, 6506 flow [2024-06-21 21:06:57,742 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:06:57,742 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:06:57,742 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:06:57,742 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112 [2024-06-21 21:06:57,742 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)] === [2024-06-21 21:06:57,742 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:06:57,742 INFO L85 PathProgramCache]: Analyzing trace with hash -382817083, now seen corresponding path program 5 times [2024-06-21 21:06:57,742 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:06:57,743 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1055818179] [2024-06-21 21:06:57,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:06:57,743 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:06:57,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:06:58,542 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:06:58,542 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:06:58,542 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1055818179] [2024-06-21 21:06:58,542 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1055818179] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:06:58,542 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:06:58,542 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:06:58,543 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1552471213] [2024-06-21 21:06:58,543 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:06:58,543 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:06:58,543 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:06:58,543 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:06:58,543 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:06:58,617 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 21:06:58,617 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 382 places, 491 transitions, 6506 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:06:58,617 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:06:58,617 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 21:06:58,618 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:07:00,179 INFO L124 PetriNetUnfolderBase]: 4119/6544 cut-off events. [2024-06-21 21:07:00,180 INFO L125 PetriNetUnfolderBase]: For 1450429/1450431 co-relation queries the response was YES. [2024-06-21 21:07:00,248 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70519 conditions, 6544 events. 4119/6544 cut-off events. For 1450429/1450431 co-relation queries the response was YES. Maximal size of possible extension queue 411. Compared 40327 event pairs, 844 based on Foata normal form. 4/6545 useless extension candidates. Maximal degree in co-relation 70340. Up to 6065 conditions per place. [2024-06-21 21:07:00,276 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 394 selfloop transitions, 118 changer transitions 0/516 dead transitions. [2024-06-21 21:07:00,276 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 389 places, 516 transitions, 8194 flow [2024-06-21 21:07:00,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:07:00,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:07:00,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 143 transitions. [2024-06-21 21:07:00,277 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4255952380952381 [2024-06-21 21:07:00,277 INFO L175 Difference]: Start difference. First operand has 382 places, 491 transitions, 6506 flow. Second operand 8 states and 143 transitions. [2024-06-21 21:07:00,277 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 389 places, 516 transitions, 8194 flow [2024-06-21 21:07:04,103 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 382 places, 516 transitions, 8016 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-06-21 21:07:04,109 INFO L231 Difference]: Finished difference. Result has 383 places, 497 transitions, 6686 flow [2024-06-21 21:07:04,110 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6328, PETRI_DIFFERENCE_MINUEND_PLACES=375, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=491, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=112, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=379, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6686, PETRI_PLACES=383, PETRI_TRANSITIONS=497} [2024-06-21 21:07:04,110 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 340 predicate places. [2024-06-21 21:07:04,110 INFO L495 AbstractCegarLoop]: Abstraction has has 383 places, 497 transitions, 6686 flow [2024-06-21 21:07:04,110 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:07:04,110 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:07:04,111 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:07:04,111 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113 [2024-06-21 21:07:04,111 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)] === [2024-06-21 21:07:04,111 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:07:04,111 INFO L85 PathProgramCache]: Analyzing trace with hash -383232793, now seen corresponding path program 6 times [2024-06-21 21:07:04,111 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:07:04,112 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1650975983] [2024-06-21 21:07:04,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:07:04,112 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:07:04,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:07:04,932 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:07:04,932 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:07:04,932 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1650975983] [2024-06-21 21:07:04,932 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1650975983] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:07:04,932 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:07:04,932 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:07:04,932 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [370433927] [2024-06-21 21:07:04,932 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:07:04,933 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:07:04,933 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:07:04,933 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:07:04,933 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:07:05,042 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 21:07:05,042 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 383 places, 497 transitions, 6686 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:07:05,042 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:07:05,042 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 21:07:05,042 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:07:06,755 INFO L124 PetriNetUnfolderBase]: 4113/6536 cut-off events. [2024-06-21 21:07:06,755 INFO L125 PetriNetUnfolderBase]: For 1460640/1460642 co-relation queries the response was YES. [2024-06-21 21:07:06,823 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70512 conditions, 6536 events. 4113/6536 cut-off events. For 1460640/1460642 co-relation queries the response was YES. Maximal size of possible extension queue 411. Compared 40308 event pairs, 847 based on Foata normal form. 4/6537 useless extension candidates. Maximal degree in co-relation 70332. Up to 6060 conditions per place. [2024-06-21 21:07:06,851 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 397 selfloop transitions, 115 changer transitions 0/516 dead transitions. [2024-06-21 21:07:06,851 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 390 places, 516 transitions, 8262 flow [2024-06-21 21:07:06,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:07:06,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:07:06,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 144 transitions. [2024-06-21 21:07:06,852 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-21 21:07:06,852 INFO L175 Difference]: Start difference. First operand has 383 places, 497 transitions, 6686 flow. Second operand 8 states and 144 transitions. [2024-06-21 21:07:06,852 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 390 places, 516 transitions, 8262 flow [2024-06-21 21:07:11,322 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 386 places, 516 transitions, 8042 flow, removed 38 selfloop flow, removed 4 redundant places. [2024-06-21 21:07:11,327 INFO L231 Difference]: Finished difference. Result has 387 places, 497 transitions, 6702 flow [2024-06-21 21:07:11,328 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6466, PETRI_DIFFERENCE_MINUEND_PLACES=379, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=497, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=115, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=382, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6702, PETRI_PLACES=387, PETRI_TRANSITIONS=497} [2024-06-21 21:07:11,328 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 344 predicate places. [2024-06-21 21:07:11,328 INFO L495 AbstractCegarLoop]: Abstraction has has 387 places, 497 transitions, 6702 flow [2024-06-21 21:07:11,328 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:07:11,328 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:07:11,328 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:07:11,328 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable114 [2024-06-21 21:07:11,328 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)] === [2024-06-21 21:07:11,328 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:07:11,328 INFO L85 PathProgramCache]: Analyzing trace with hash 790332633, now seen corresponding path program 8 times [2024-06-21 21:07:11,329 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:07:11,329 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [773847451] [2024-06-21 21:07:11,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:07:11,329 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:07:11,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:07:12,165 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:07:12,165 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:07:12,165 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [773847451] [2024-06-21 21:07:12,165 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [773847451] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:07:12,166 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:07:12,166 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:07:12,166 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [326953799] [2024-06-21 21:07:12,166 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:07:12,166 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:07:12,166 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:07:12,166 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:07:12,166 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:07:12,259 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 21:07:12,260 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 387 places, 497 transitions, 6702 flow. Second operand has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:07:12,260 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:07:12,260 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 21:07:12,260 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:07:13,789 INFO L124 PetriNetUnfolderBase]: 4051/6486 cut-off events. [2024-06-21 21:07:13,789 INFO L125 PetriNetUnfolderBase]: For 1501197/1501199 co-relation queries the response was YES. [2024-06-21 21:07:13,864 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70752 conditions, 6486 events. 4051/6486 cut-off events. For 1501197/1501199 co-relation queries the response was YES. Maximal size of possible extension queue 415. Compared 40436 event pairs, 815 based on Foata normal form. 4/6487 useless extension candidates. Maximal degree in co-relation 70571. Up to 5736 conditions per place. [2024-06-21 21:07:13,895 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 348 selfloop transitions, 141 changer transitions 0/522 dead transitions. [2024-06-21 21:07:13,895 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 395 places, 522 transitions, 8408 flow [2024-06-21 21:07:13,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:07:13,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:07:13,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 162 transitions. [2024-06-21 21:07:13,896 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-21 21:07:13,896 INFO L175 Difference]: Start difference. First operand has 387 places, 497 transitions, 6702 flow. Second operand 9 states and 162 transitions. [2024-06-21 21:07:13,896 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 395 places, 522 transitions, 8408 flow [2024-06-21 21:07:18,727 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 390 places, 522 transitions, 8177 flow, removed 17 selfloop flow, removed 5 redundant places. [2024-06-21 21:07:18,733 INFO L231 Difference]: Finished difference. Result has 391 places, 503 transitions, 6931 flow [2024-06-21 21:07:18,733 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6471, PETRI_DIFFERENCE_MINUEND_PLACES=382, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=497, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=135, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=362, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6931, PETRI_PLACES=391, PETRI_TRANSITIONS=503} [2024-06-21 21:07:18,733 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 348 predicate places. [2024-06-21 21:07:18,733 INFO L495 AbstractCegarLoop]: Abstraction has has 391 places, 503 transitions, 6931 flow [2024-06-21 21:07:18,733 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:07:18,733 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:07:18,733 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:07:18,734 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115 [2024-06-21 21:07:18,734 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)] === [2024-06-21 21:07:18,734 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:07:18,734 INFO L85 PathProgramCache]: Analyzing trace with hash 1051862497, now seen corresponding path program 9 times [2024-06-21 21:07:18,734 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:07:18,734 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1025536175] [2024-06-21 21:07:18,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:07:18,734 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:07:18,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:07:19,553 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:07:19,553 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:07:19,553 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1025536175] [2024-06-21 21:07:19,553 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1025536175] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:07:19,553 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:07:19,553 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:07:19,554 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [185200140] [2024-06-21 21:07:19,554 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:07:19,554 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:07:19,554 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:07:19,554 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:07:19,554 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:07:19,643 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 21:07:19,643 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 391 places, 503 transitions, 6931 flow. Second operand has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:07:19,644 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:07:19,644 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 21:07:19,644 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:07:21,237 INFO L124 PetriNetUnfolderBase]: 4050/6483 cut-off events. [2024-06-21 21:07:21,237 INFO L125 PetriNetUnfolderBase]: For 1511412/1511414 co-relation queries the response was YES. [2024-06-21 21:07:21,311 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70744 conditions, 6483 events. 4050/6483 cut-off events. For 1511412/1511414 co-relation queries the response was YES. Maximal size of possible extension queue 416. Compared 40433 event pairs, 819 based on Foata normal form. 4/6484 useless extension candidates. Maximal degree in co-relation 70562. Up to 5732 conditions per place. [2024-06-21 21:07:21,343 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 347 selfloop transitions, 141 changer transitions 0/521 dead transitions. [2024-06-21 21:07:21,343 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 398 places, 521 transitions, 8233 flow [2024-06-21 21:07:21,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:07:21,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:07:21,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 149 transitions. [2024-06-21 21:07:21,344 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44345238095238093 [2024-06-21 21:07:21,344 INFO L175 Difference]: Start difference. First operand has 391 places, 503 transitions, 6931 flow. Second operand 8 states and 149 transitions. [2024-06-21 21:07:21,344 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 398 places, 521 transitions, 8233 flow [2024-06-21 21:07:25,695 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 393 places, 521 transitions, 7906 flow, removed 72 selfloop flow, removed 5 redundant places. [2024-06-21 21:07:25,700 INFO L231 Difference]: Finished difference. Result has 394 places, 503 transitions, 6892 flow [2024-06-21 21:07:25,701 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6604, PETRI_DIFFERENCE_MINUEND_PLACES=386, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=503, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=141, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=362, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6892, PETRI_PLACES=394, PETRI_TRANSITIONS=503} [2024-06-21 21:07:25,701 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 351 predicate places. [2024-06-21 21:07:25,701 INFO L495 AbstractCegarLoop]: Abstraction has has 394 places, 503 transitions, 6892 flow [2024-06-21 21:07:25,701 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:07:25,701 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:07:25,701 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:07:25,701 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116 [2024-06-21 21:07:25,701 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)] === [2024-06-21 21:07:25,701 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:07:25,702 INFO L85 PathProgramCache]: Analyzing trace with hash -1102632799, now seen corresponding path program 10 times [2024-06-21 21:07:25,702 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:07:25,702 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [295668542] [2024-06-21 21:07:25,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:07:25,702 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:07:25,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:07:26,528 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:07:26,528 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:07:26,528 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [295668542] [2024-06-21 21:07:26,528 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [295668542] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:07:26,528 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:07:26,528 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:07:26,528 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1497005412] [2024-06-21 21:07:26,529 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:07:26,529 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:07:26,529 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:07:26,529 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:07:26,529 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:07:26,603 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 21:07:26,603 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 394 places, 503 transitions, 6892 flow. Second operand has 10 states, 10 states have (on average 11.5) internal successors, (115), 10 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) [2024-06-21 21:07:26,603 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:07:26,603 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 21:07:26,603 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:07:28,382 INFO L124 PetriNetUnfolderBase]: 4051/6494 cut-off events. [2024-06-21 21:07:28,382 INFO L125 PetriNetUnfolderBase]: For 1535306/1535308 co-relation queries the response was YES. [2024-06-21 21:07:28,448 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70891 conditions, 6494 events. 4051/6494 cut-off events. For 1535306/1535308 co-relation queries the response was YES. Maximal size of possible extension queue 417. Compared 40572 event pairs, 812 based on Foata normal form. 4/6495 useless extension candidates. Maximal degree in co-relation 70708. Up to 6060 conditions per place. [2024-06-21 21:07:28,477 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 432 selfloop transitions, 56 changer transitions 0/521 dead transitions. [2024-06-21 21:07:28,477 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 401 places, 521 transitions, 8497 flow [2024-06-21 21:07:28,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:07:28,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:07:28,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 143 transitions. [2024-06-21 21:07:28,478 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4255952380952381 [2024-06-21 21:07:28,478 INFO L175 Difference]: Start difference. First operand has 394 places, 503 transitions, 6892 flow. Second operand 8 states and 143 transitions. [2024-06-21 21:07:28,478 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 401 places, 521 transitions, 8497 flow [2024-06-21 21:07:32,184 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 393 places, 521 transitions, 8187 flow, removed 5 selfloop flow, removed 8 redundant places. [2024-06-21 21:07:32,189 INFO L231 Difference]: Finished difference. Result has 394 places, 506 transitions, 6789 flow [2024-06-21 21:07:32,190 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6588, PETRI_DIFFERENCE_MINUEND_PLACES=386, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=503, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=450, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6789, PETRI_PLACES=394, PETRI_TRANSITIONS=506} [2024-06-21 21:07:32,190 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 351 predicate places. [2024-06-21 21:07:32,190 INFO L495 AbstractCegarLoop]: Abstraction has has 394 places, 506 transitions, 6789 flow [2024-06-21 21:07:32,190 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.5) internal successors, (115), 10 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) [2024-06-21 21:07:32,190 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:07:32,190 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:07:32,190 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117 [2024-06-21 21:07:32,190 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)] === [2024-06-21 21:07:32,190 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:07:32,191 INFO L85 PathProgramCache]: Analyzing trace with hash -1150726137, now seen corresponding path program 11 times [2024-06-21 21:07:32,191 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:07:32,191 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1806635330] [2024-06-21 21:07:32,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:07:32,191 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:07:32,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:07:32,994 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:07:32,994 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:07:32,994 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1806635330] [2024-06-21 21:07:32,994 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1806635330] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:07:32,994 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:07:32,994 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:07:32,994 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [568589261] [2024-06-21 21:07:32,994 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:07:32,994 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:07:32,995 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:07:32,995 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:07:32,995 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:07:33,075 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 21:07:33,076 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 394 places, 506 transitions, 6789 flow. Second operand has 10 states, 10 states have (on average 11.5) internal successors, (115), 10 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) [2024-06-21 21:07:33,076 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:07:33,076 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 21:07:33,076 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:07:34,728 INFO L124 PetriNetUnfolderBase]: 4049/6486 cut-off events. [2024-06-21 21:07:34,729 INFO L125 PetriNetUnfolderBase]: For 1543327/1543329 co-relation queries the response was YES. [2024-06-21 21:07:34,805 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70463 conditions, 6486 events. 4049/6486 cut-off events. For 1543327/1543329 co-relation queries the response was YES. Maximal size of possible extension queue 415. Compared 40470 event pairs, 821 based on Foata normal form. 4/6487 useless extension candidates. Maximal degree in co-relation 70280. Up to 6118 conditions per place. [2024-06-21 21:07:34,835 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 450 selfloop transitions, 35 changer transitions 0/518 dead transitions. [2024-06-21 21:07:34,835 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 401 places, 518 transitions, 7813 flow [2024-06-21 21:07:34,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:07:34,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:07:34,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 137 transitions. [2024-06-21 21:07:34,836 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40773809523809523 [2024-06-21 21:07:34,836 INFO L175 Difference]: Start difference. First operand has 394 places, 506 transitions, 6789 flow. Second operand 8 states and 137 transitions. [2024-06-21 21:07:34,836 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 401 places, 518 transitions, 7813 flow [2024-06-21 21:07:39,550 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 395 places, 518 transitions, 7481 flow, removed 64 selfloop flow, removed 6 redundant places. [2024-06-21 21:07:39,555 INFO L231 Difference]: Finished difference. Result has 396 places, 506 transitions, 6533 flow [2024-06-21 21:07:39,556 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6457, PETRI_DIFFERENCE_MINUEND_PLACES=388, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=506, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=471, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6533, PETRI_PLACES=396, PETRI_TRANSITIONS=506} [2024-06-21 21:07:39,556 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 353 predicate places. [2024-06-21 21:07:39,556 INFO L495 AbstractCegarLoop]: Abstraction has has 396 places, 506 transitions, 6533 flow [2024-06-21 21:07:39,556 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.5) internal successors, (115), 10 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) [2024-06-21 21:07:39,556 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:07:39,556 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:07:39,556 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118 [2024-06-21 21:07:39,556 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)] === [2024-06-21 21:07:39,557 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:07:39,557 INFO L85 PathProgramCache]: Analyzing trace with hash -745277571, now seen corresponding path program 7 times [2024-06-21 21:07:39,557 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:07:39,557 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [732104019] [2024-06-21 21:07:39,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:07:39,557 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:07:39,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:07:40,354 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:07:40,354 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:07:40,354 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [732104019] [2024-06-21 21:07:40,354 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [732104019] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:07:40,354 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:07:40,354 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:07:40,354 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [877059259] [2024-06-21 21:07:40,354 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:07:40,354 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:07:40,354 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:07:40,355 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:07:40,355 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:07:40,418 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 21:07:40,419 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 396 places, 506 transitions, 6533 flow. Second operand has 10 states, 10 states have (on average 10.5) internal successors, (105), 10 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:07:40,419 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:07:40,419 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 21:07:40,419 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:07:42,113 INFO L124 PetriNetUnfolderBase]: 4163/6610 cut-off events. [2024-06-21 21:07:42,113 INFO L125 PetriNetUnfolderBase]: For 1575792/1575794 co-relation queries the response was YES. [2024-06-21 21:07:42,190 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71461 conditions, 6610 events. 4163/6610 cut-off events. For 1575792/1575794 co-relation queries the response was YES. Maximal size of possible extension queue 420. Compared 40744 event pairs, 848 based on Foata normal form. 4/6611 useless extension candidates. Maximal degree in co-relation 71277. Up to 6353 conditions per place. [2024-06-21 21:07:42,219 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 465 selfloop transitions, 56 changer transitions 0/525 dead transitions. [2024-06-21 21:07:42,220 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 403 places, 525 transitions, 7998 flow [2024-06-21 21:07:42,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:07:42,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:07:42,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 133 transitions. [2024-06-21 21:07:42,220 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3958333333333333 [2024-06-21 21:07:42,220 INFO L175 Difference]: Start difference. First operand has 396 places, 506 transitions, 6533 flow. Second operand 8 states and 133 transitions. [2024-06-21 21:07:42,221 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 403 places, 525 transitions, 7998 flow [2024-06-21 21:07:46,844 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 395 places, 525 transitions, 7842 flow, removed 6 selfloop flow, removed 8 redundant places. [2024-06-21 21:07:46,849 INFO L231 Difference]: Finished difference. Result has 397 places, 512 transitions, 6653 flow [2024-06-21 21:07:46,850 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6377, PETRI_DIFFERENCE_MINUEND_PLACES=388, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=506, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=450, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6653, PETRI_PLACES=397, PETRI_TRANSITIONS=512} [2024-06-21 21:07:46,850 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 354 predicate places. [2024-06-21 21:07:46,850 INFO L495 AbstractCegarLoop]: Abstraction has has 397 places, 512 transitions, 6653 flow [2024-06-21 21:07:46,850 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.5) internal successors, (105), 10 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:07:46,850 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:07:46,851 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:07:46,851 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119 [2024-06-21 21:07:46,851 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)] === [2024-06-21 21:07:46,851 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:07:46,851 INFO L85 PathProgramCache]: Analyzing trace with hash -700927449, now seen corresponding path program 4 times [2024-06-21 21:07:46,851 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:07:46,851 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [773897152] [2024-06-21 21:07:46,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:07:46,852 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:07:46,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:07:47,667 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:07:47,667 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:07:47,667 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [773897152] [2024-06-21 21:07:47,667 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [773897152] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:07:47,667 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:07:47,667 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:07:47,668 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1798311687] [2024-06-21 21:07:47,668 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:07:47,668 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:07:47,668 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:07:47,668 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:07:47,668 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:07:47,760 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 21:07:47,760 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 397 places, 512 transitions, 6653 flow. Second operand has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:07:47,760 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:07:47,760 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 21:07:47,760 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:07:49,484 INFO L124 PetriNetUnfolderBase]: 4073/6519 cut-off events. [2024-06-21 21:07:49,484 INFO L125 PetriNetUnfolderBase]: For 1587729/1587729 co-relation queries the response was YES. [2024-06-21 21:07:49,555 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71035 conditions, 6519 events. 4073/6519 cut-off events. For 1587729/1587729 co-relation queries the response was YES. Maximal size of possible extension queue 421. Compared 40640 event pairs, 834 based on Foata normal form. 1/6517 useless extension candidates. Maximal degree in co-relation 70849. Up to 6115 conditions per place. [2024-06-21 21:07:49,583 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 449 selfloop transitions, 38 changer transitions 0/522 dead transitions. [2024-06-21 21:07:49,584 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 404 places, 522 transitions, 7653 flow [2024-06-21 21:07:49,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:07:49,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:07:49,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 137 transitions. [2024-06-21 21:07:49,585 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40773809523809523 [2024-06-21 21:07:49,585 INFO L175 Difference]: Start difference. First operand has 397 places, 512 transitions, 6653 flow. Second operand 8 states and 137 transitions. [2024-06-21 21:07:49,585 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 404 places, 522 transitions, 7653 flow [2024-06-21 21:07:55,173 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 400 places, 522 transitions, 7496 flow, removed 42 selfloop flow, removed 4 redundant places. [2024-06-21 21:07:55,179 INFO L231 Difference]: Finished difference. Result has 401 places, 512 transitions, 6578 flow [2024-06-21 21:07:55,179 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6496, PETRI_DIFFERENCE_MINUEND_PLACES=393, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=512, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=474, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6578, PETRI_PLACES=401, PETRI_TRANSITIONS=512} [2024-06-21 21:07:55,179 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 358 predicate places. [2024-06-21 21:07:55,179 INFO L495 AbstractCegarLoop]: Abstraction has has 401 places, 512 transitions, 6578 flow [2024-06-21 21:07:55,179 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:07:55,179 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:07:55,180 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:07:55,180 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120 [2024-06-21 21:07:55,180 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)] === [2024-06-21 21:07:55,180 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:07:55,180 INFO L85 PathProgramCache]: Analyzing trace with hash -750991491, now seen corresponding path program 8 times [2024-06-21 21:07:55,180 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:07:55,180 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1849150960] [2024-06-21 21:07:55,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:07:55,180 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:07:55,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:07:55,924 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:07:55,925 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:07:55,925 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1849150960] [2024-06-21 21:07:55,925 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1849150960] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:07:55,925 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:07:55,925 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:07:55,925 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [941451161] [2024-06-21 21:07:55,925 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:07:55,925 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:07:55,925 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:07:55,926 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:07:55,926 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:07:56,025 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 21:07:56,025 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 401 places, 512 transitions, 6578 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:07:56,025 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:07:56,025 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 21:07:56,025 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:07:57,856 INFO L124 PetriNetUnfolderBase]: 4170/6624 cut-off events. [2024-06-21 21:07:57,856 INFO L125 PetriNetUnfolderBase]: For 1615579/1615581 co-relation queries the response was YES. [2024-06-21 21:07:57,927 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71779 conditions, 6624 events. 4170/6624 cut-off events. For 1615579/1615581 co-relation queries the response was YES. Maximal size of possible extension queue 423. Compared 40945 event pairs, 848 based on Foata normal form. 4/6625 useless extension candidates. Maximal degree in co-relation 71592. Up to 6389 conditions per place. [2024-06-21 21:07:57,954 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 475 selfloop transitions, 48 changer transitions 0/527 dead transitions. [2024-06-21 21:07:57,954 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 409 places, 527 transitions, 7734 flow [2024-06-21 21:07:57,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:07:57,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:07:57,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 141 transitions. [2024-06-21 21:07:57,955 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.373015873015873 [2024-06-21 21:07:57,955 INFO L175 Difference]: Start difference. First operand has 401 places, 512 transitions, 6578 flow. Second operand 9 states and 141 transitions. [2024-06-21 21:07:57,955 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 409 places, 527 transitions, 7734 flow [2024-06-21 21:08:02,936 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 401 places, 527 transitions, 7604 flow, removed 11 selfloop flow, removed 8 redundant places. [2024-06-21 21:08:02,941 INFO L231 Difference]: Finished difference. Result has 402 places, 516 transitions, 6626 flow [2024-06-21 21:08:02,941 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6448, PETRI_DIFFERENCE_MINUEND_PLACES=393, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=512, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=465, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6626, PETRI_PLACES=402, PETRI_TRANSITIONS=516} [2024-06-21 21:08:02,942 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 359 predicate places. [2024-06-21 21:08:02,942 INFO L495 AbstractCegarLoop]: Abstraction has has 402 places, 516 transitions, 6626 flow [2024-06-21 21:08:02,942 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:08:02,942 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:08:02,942 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:08:02,942 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121 [2024-06-21 21:08:02,942 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)] === [2024-06-21 21:08:02,942 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:08:02,942 INFO L85 PathProgramCache]: Analyzing trace with hash -1150488801, now seen corresponding path program 9 times [2024-06-21 21:08:02,942 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:08:02,942 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1980654686] [2024-06-21 21:08:02,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:08:02,943 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:08:02,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:08:03,693 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:08:03,693 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:08:03,693 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1980654686] [2024-06-21 21:08:03,693 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1980654686] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:08:03,693 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:08:03,693 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:08:03,693 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [30657989] [2024-06-21 21:08:03,693 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:08:03,694 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:08:03,694 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:08:03,694 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:08:03,694 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:08:03,780 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 21:08:03,780 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 402 places, 516 transitions, 6626 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:08:03,780 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:08:03,780 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 21:08:03,780 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:08:05,453 INFO L124 PetriNetUnfolderBase]: 4164/6616 cut-off events. [2024-06-21 21:08:05,453 INFO L125 PetriNetUnfolderBase]: For 1624825/1624827 co-relation queries the response was YES. [2024-06-21 21:08:05,533 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71658 conditions, 6616 events. 4164/6616 cut-off events. For 1624825/1624827 co-relation queries the response was YES. Maximal size of possible extension queue 423. Compared 40895 event pairs, 847 based on Foata normal form. 4/6617 useless extension candidates. Maximal degree in co-relation 71470. Up to 6381 conditions per place. [2024-06-21 21:08:05,565 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 478 selfloop transitions, 45 changer transitions 0/527 dead transitions. [2024-06-21 21:08:05,565 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 410 places, 527 transitions, 7712 flow [2024-06-21 21:08:05,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:08:05,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:08:05,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 142 transitions. [2024-06-21 21:08:05,566 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37566137566137564 [2024-06-21 21:08:05,566 INFO L175 Difference]: Start difference. First operand has 402 places, 516 transitions, 6626 flow. Second operand 9 states and 142 transitions. [2024-06-21 21:08:05,566 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 410 places, 527 transitions, 7712 flow [2024-06-21 21:08:11,403 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 404 places, 527 transitions, 7564 flow, removed 29 selfloop flow, removed 6 redundant places. [2024-06-21 21:08:11,409 INFO L231 Difference]: Finished difference. Result has 405 places, 516 transitions, 6574 flow [2024-06-21 21:08:11,409 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6478, PETRI_DIFFERENCE_MINUEND_PLACES=396, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=516, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=471, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6574, PETRI_PLACES=405, PETRI_TRANSITIONS=516} [2024-06-21 21:08:11,409 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 362 predicate places. [2024-06-21 21:08:11,409 INFO L495 AbstractCegarLoop]: Abstraction has has 405 places, 516 transitions, 6574 flow [2024-06-21 21:08:11,409 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:08:11,409 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:08:11,409 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:08:11,410 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122 [2024-06-21 21:08:11,410 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)] === [2024-06-21 21:08:11,410 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:08:11,410 INFO L85 PathProgramCache]: Analyzing trace with hash -973594431, now seen corresponding path program 10 times [2024-06-21 21:08:11,410 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:08:11,410 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [447812841] [2024-06-21 21:08:11,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:08:11,410 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:08:11,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:08:12,218 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:08:12,218 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:08:12,218 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [447812841] [2024-06-21 21:08:12,218 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [447812841] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:08:12,218 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:08:12,218 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:08:12,218 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [532658686] [2024-06-21 21:08:12,219 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:08:12,219 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:08:12,219 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:08:12,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:08:12,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:08:12,295 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 21:08:12,295 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 405 places, 516 transitions, 6574 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:08:12,296 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:08:12,296 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 21:08:12,296 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:08:13,897 INFO L124 PetriNetUnfolderBase]: 4174/6644 cut-off events. [2024-06-21 21:08:13,897 INFO L125 PetriNetUnfolderBase]: For 1649017/1649019 co-relation queries the response was YES. [2024-06-21 21:08:13,976 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71921 conditions, 6644 events. 4174/6644 cut-off events. For 1649017/1649019 co-relation queries the response was YES. Maximal size of possible extension queue 426. Compared 41239 event pairs, 845 based on Foata normal form. 4/6645 useless extension candidates. Maximal degree in co-relation 71732. Up to 6284 conditions per place. [2024-06-21 21:08:14,006 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 442 selfloop transitions, 88 changer transitions 0/534 dead transitions. [2024-06-21 21:08:14,007 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 413 places, 534 transitions, 8265 flow [2024-06-21 21:08:14,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:08:14,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:08:14,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 148 transitions. [2024-06-21 21:08:14,007 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3915343915343915 [2024-06-21 21:08:14,007 INFO L175 Difference]: Start difference. First operand has 405 places, 516 transitions, 6574 flow. Second operand 9 states and 148 transitions. [2024-06-21 21:08:14,008 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 413 places, 534 transitions, 8265 flow [2024-06-21 21:08:20,077 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 404 places, 534 transitions, 8112 flow, removed 6 selfloop flow, removed 9 redundant places. [2024-06-21 21:08:20,083 INFO L231 Difference]: Finished difference. Result has 405 places, 519 transitions, 6670 flow [2024-06-21 21:08:20,083 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6421, PETRI_DIFFERENCE_MINUEND_PLACES=396, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=516, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=85, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=431, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6670, PETRI_PLACES=405, PETRI_TRANSITIONS=519} [2024-06-21 21:08:20,084 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 362 predicate places. [2024-06-21 21:08:20,084 INFO L495 AbstractCegarLoop]: Abstraction has has 405 places, 519 transitions, 6670 flow [2024-06-21 21:08:20,084 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:08:20,084 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:08:20,084 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:08:20,084 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123 [2024-06-21 21:08:20,084 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)] === [2024-06-21 21:08:20,084 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:08:20,084 INFO L85 PathProgramCache]: Analyzing trace with hash -973357467, now seen corresponding path program 12 times [2024-06-21 21:08:20,084 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:08:20,084 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1070472334] [2024-06-21 21:08:20,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:08:20,085 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:08:20,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:08:20,846 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:08:20,846 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:08:20,846 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1070472334] [2024-06-21 21:08:20,846 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1070472334] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:08:20,846 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:08:20,847 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:08:20,847 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [368407851] [2024-06-21 21:08:20,847 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:08:20,847 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:08:20,847 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:08:20,847 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:08:20,847 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:08:20,933 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 21:08:20,933 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 405 places, 519 transitions, 6670 flow. Second operand has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:08:20,933 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:08:20,933 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 21:08:20,933 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:08:22,575 INFO L124 PetriNetUnfolderBase]: 4070/6538 cut-off events. [2024-06-21 21:08:22,575 INFO L125 PetriNetUnfolderBase]: For 1660892/1660894 co-relation queries the response was YES. [2024-06-21 21:08:22,649 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71249 conditions, 6538 events. 4070/6538 cut-off events. For 1660892/1660894 co-relation queries the response was YES. Maximal size of possible extension queue 426. Compared 41047 event pairs, 812 based on Foata normal form. 4/6539 useless extension candidates. Maximal degree in co-relation 71059. Up to 6088 conditions per place. [2024-06-21 21:08:22,678 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 435 selfloop transitions, 60 changer transitions 0/532 dead transitions. [2024-06-21 21:08:22,679 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 412 places, 532 transitions, 7728 flow [2024-06-21 21:08:22,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:08:22,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:08:22,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 140 transitions. [2024-06-21 21:08:22,679 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4166666666666667 [2024-06-21 21:08:22,680 INFO L175 Difference]: Start difference. First operand has 405 places, 519 transitions, 6670 flow. Second operand 8 states and 140 transitions. [2024-06-21 21:08:22,680 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 412 places, 532 transitions, 7728 flow [2024-06-21 21:08:28,082 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 405 places, 532 transitions, 7379 flow, removed 63 selfloop flow, removed 7 redundant places. [2024-06-21 21:08:28,088 INFO L231 Difference]: Finished difference. Result has 406 places, 519 transitions, 6447 flow [2024-06-21 21:08:28,088 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6321, PETRI_DIFFERENCE_MINUEND_PLACES=398, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=519, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=459, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6447, PETRI_PLACES=406, PETRI_TRANSITIONS=519} [2024-06-21 21:08:28,088 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 363 predicate places. [2024-06-21 21:08:28,088 INFO L495 AbstractCegarLoop]: Abstraction has has 406 places, 519 transitions, 6447 flow [2024-06-21 21:08:28,088 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:08:28,088 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:08:28,088 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:08:28,089 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable124 [2024-06-21 21:08:28,089 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)] === [2024-06-21 21:08:28,089 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:08:28,089 INFO L85 PathProgramCache]: Analyzing trace with hash -523259877, now seen corresponding path program 11 times [2024-06-21 21:08:28,089 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:08:28,089 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [405611463] [2024-06-21 21:08:28,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:08:28,090 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:08:28,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:08:28,903 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:08:28,903 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:08:28,903 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [405611463] [2024-06-21 21:08:28,903 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [405611463] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:08:28,903 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:08:28,904 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:08:28,904 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1705030850] [2024-06-21 21:08:28,904 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:08:28,904 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:08:28,904 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:08:28,904 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:08:28,904 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:08:29,029 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 21:08:29,030 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 406 places, 519 transitions, 6447 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:08:29,030 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:08:29,030 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 21:08:29,030 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:08:30,743 INFO L124 PetriNetUnfolderBase]: 4162/6622 cut-off events. [2024-06-21 21:08:30,743 INFO L125 PetriNetUnfolderBase]: For 1664268/1664270 co-relation queries the response was YES. [2024-06-21 21:08:30,813 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71487 conditions, 6622 events. 4162/6622 cut-off events. For 1664268/1664270 co-relation queries the response was YES. Maximal size of possible extension queue 425. Compared 41040 event pairs, 830 based on Foata normal form. 4/6623 useless extension candidates. Maximal degree in co-relation 71296. Up to 6271 conditions per place. [2024-06-21 21:08:30,839 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 438 selfloop transitions, 91 changer transitions 0/533 dead transitions. [2024-06-21 21:08:30,840 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 414 places, 533 transitions, 7825 flow [2024-06-21 21:08:30,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:08:30,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:08:30,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 147 transitions. [2024-06-21 21:08:30,840 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3888888888888889 [2024-06-21 21:08:30,841 INFO L175 Difference]: Start difference. First operand has 406 places, 519 transitions, 6447 flow. Second operand 9 states and 147 transitions. [2024-06-21 21:08:30,841 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 414 places, 533 transitions, 7825 flow [2024-06-21 21:08:36,153 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 407 places, 533 transitions, 7663 flow, removed 19 selfloop flow, removed 7 redundant places. [2024-06-21 21:08:36,159 INFO L231 Difference]: Finished difference. Result has 408 places, 519 transitions, 6473 flow [2024-06-21 21:08:36,159 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6285, PETRI_DIFFERENCE_MINUEND_PLACES=399, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=519, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=91, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=428, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6473, PETRI_PLACES=408, PETRI_TRANSITIONS=519} [2024-06-21 21:08:36,160 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 365 predicate places. [2024-06-21 21:08:36,160 INFO L495 AbstractCegarLoop]: Abstraction has has 408 places, 519 transitions, 6473 flow [2024-06-21 21:08:36,160 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:08:36,160 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:08:36,160 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:08:36,160 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable125 [2024-06-21 21:08:36,160 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)] === [2024-06-21 21:08:36,161 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:08:36,161 INFO L85 PathProgramCache]: Analyzing trace with hash 1317377847, now seen corresponding path program 12 times [2024-06-21 21:08:36,161 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:08:36,161 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [23082322] [2024-06-21 21:08:36,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:08:36,161 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:08:36,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:08:36,963 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:08:36,964 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:08:36,964 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [23082322] [2024-06-21 21:08:36,964 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [23082322] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:08:36,964 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:08:36,964 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:08:36,964 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [569265521] [2024-06-21 21:08:36,964 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:08:36,965 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:08:36,965 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:08:36,965 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:08:36,965 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:08:37,030 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 21:08:37,031 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 408 places, 519 transitions, 6473 flow. Second operand has 10 states, 10 states have (on average 10.5) internal successors, (105), 10 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:08:37,031 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:08:37,031 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 21:08:37,031 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:08:38,909 INFO L124 PetriNetUnfolderBase]: 4156/6610 cut-off events. [2024-06-21 21:08:38,909 INFO L125 PetriNetUnfolderBase]: For 1672400/1672402 co-relation queries the response was YES. [2024-06-21 21:08:38,977 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71397 conditions, 6610 events. 4156/6610 cut-off events. For 1672400/1672402 co-relation queries the response was YES. Maximal size of possible extension queue 425. Compared 40918 event pairs, 840 based on Foata normal form. 4/6611 useless extension candidates. Maximal degree in co-relation 71205. Up to 6351 conditions per place. [2024-06-21 21:08:39,003 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 476 selfloop transitions, 51 changer transitions 0/531 dead transitions. [2024-06-21 21:08:39,003 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 415 places, 531 transitions, 7581 flow [2024-06-21 21:08:39,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:08:39,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:08:39,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 133 transitions. [2024-06-21 21:08:39,004 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3958333333333333 [2024-06-21 21:08:39,004 INFO L175 Difference]: Start difference. First operand has 408 places, 519 transitions, 6473 flow. Second operand 8 states and 133 transitions. [2024-06-21 21:08:39,004 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 415 places, 531 transitions, 7581 flow [2024-06-21 21:08:43,884 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 407 places, 531 transitions, 7344 flow, removed 24 selfloop flow, removed 8 redundant places. [2024-06-21 21:08:43,890 INFO L231 Difference]: Finished difference. Result has 408 places, 519 transitions, 6344 flow [2024-06-21 21:08:43,891 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6236, PETRI_DIFFERENCE_MINUEND_PLACES=400, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=519, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=468, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6344, PETRI_PLACES=408, PETRI_TRANSITIONS=519} [2024-06-21 21:08:43,891 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 365 predicate places. [2024-06-21 21:08:43,891 INFO L495 AbstractCegarLoop]: Abstraction has has 408 places, 519 transitions, 6344 flow [2024-06-21 21:08:43,891 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.5) internal successors, (105), 10 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:08:43,891 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:08:43,892 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:08:43,892 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126 [2024-06-21 21:08:43,892 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)] === [2024-06-21 21:08:43,892 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:08:43,892 INFO L85 PathProgramCache]: Analyzing trace with hash -1150849269, now seen corresponding path program 4 times [2024-06-21 21:08:43,892 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:08:43,893 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1799149677] [2024-06-21 21:08:43,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:08:43,893 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:08:43,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:08:44,877 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:08:44,878 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:08:44,878 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1799149677] [2024-06-21 21:08:44,878 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1799149677] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:08:44,878 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:08:44,878 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:08:44,878 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1068463014] [2024-06-21 21:08:44,878 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:08:44,879 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:08:44,879 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:08:44,879 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:08:44,879 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:08:44,971 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 21:08:44,971 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 408 places, 519 transitions, 6344 flow. Second operand has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:08:44,971 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:08:44,971 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 21:08:44,971 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:08:46,903 INFO L124 PetriNetUnfolderBase]: 4060/6510 cut-off events. [2024-06-21 21:08:46,903 INFO L125 PetriNetUnfolderBase]: For 1682716/1682716 co-relation queries the response was YES. [2024-06-21 21:08:46,970 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70513 conditions, 6510 events. 4060/6510 cut-off events. For 1682716/1682716 co-relation queries the response was YES. Maximal size of possible extension queue 426. Compared 40713 event pairs, 823 based on Foata normal form. 2/6509 useless extension candidates. Maximal degree in co-relation 70321. Up to 6099 conditions per place. [2024-06-21 21:08:46,996 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 456 selfloop transitions, 37 changer transitions 0/530 dead transitions. [2024-06-21 21:08:46,997 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 415 places, 530 transitions, 7358 flow [2024-06-21 21:08:46,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:08:46,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:08:46,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 137 transitions. [2024-06-21 21:08:46,998 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40773809523809523 [2024-06-21 21:08:46,998 INFO L175 Difference]: Start difference. First operand has 408 places, 519 transitions, 6344 flow. Second operand 8 states and 137 transitions. [2024-06-21 21:08:46,998 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 415 places, 530 transitions, 7358 flow [2024-06-21 21:08:53,716 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 407 places, 530 transitions, 7166 flow, removed 13 selfloop flow, removed 8 redundant places. [2024-06-21 21:08:53,721 INFO L231 Difference]: Finished difference. Result has 408 places, 519 transitions, 6231 flow [2024-06-21 21:08:53,721 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6152, PETRI_DIFFERENCE_MINUEND_PLACES=400, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=519, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=482, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6231, PETRI_PLACES=408, PETRI_TRANSITIONS=519} [2024-06-21 21:08:53,721 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 365 predicate places. [2024-06-21 21:08:53,722 INFO L495 AbstractCegarLoop]: Abstraction has has 408 places, 519 transitions, 6231 flow [2024-06-21 21:08:53,722 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.666666666666666) internal successors, (105), 9 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:08:53,722 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:08:53,722 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:08:53,722 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127 [2024-06-21 21:08:53,722 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)] === [2024-06-21 21:08:53,723 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:08:53,723 INFO L85 PathProgramCache]: Analyzing trace with hash 1317623925, now seen corresponding path program 2 times [2024-06-21 21:08:53,723 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:08:53,723 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1216599690] [2024-06-21 21:08:53,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:08:53,724 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:08:53,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:08:54,596 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:08:54,597 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:08:54,597 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1216599690] [2024-06-21 21:08:54,597 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1216599690] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:08:54,597 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:08:54,597 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:08:54,597 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [113951566] [2024-06-21 21:08:54,597 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:08:54,598 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:08:54,598 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:08:54,598 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:08:54,598 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:08:54,708 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 21:08:54,709 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 408 places, 519 transitions, 6231 flow. Second operand has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:08:54,709 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:08:54,709 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 21:08:54,709 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:08:56,584 INFO L124 PetriNetUnfolderBase]: 4171/6627 cut-off events. [2024-06-21 21:08:56,584 INFO L125 PetriNetUnfolderBase]: For 1721007/1721007 co-relation queries the response was YES. [2024-06-21 21:08:56,664 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71404 conditions, 6627 events. 4171/6627 cut-off events. For 1721007/1721007 co-relation queries the response was YES. Maximal size of possible extension queue 426. Compared 40998 event pairs, 855 based on Foata normal form. 4/6628 useless extension candidates. Maximal degree in co-relation 71211. Up to 6239 conditions per place. [2024-06-21 21:08:56,695 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 470 selfloop transitions, 67 changer transitions 0/541 dead transitions. [2024-06-21 21:08:56,695 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 416 places, 541 transitions, 7733 flow [2024-06-21 21:08:56,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:08:56,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:08:56,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 157 transitions. [2024-06-21 21:08:56,696 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41534391534391535 [2024-06-21 21:08:56,696 INFO L175 Difference]: Start difference. First operand has 408 places, 519 transitions, 6231 flow. Second operand 9 states and 157 transitions. [2024-06-21 21:08:56,696 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 416 places, 541 transitions, 7733 flow [2024-06-21 21:09:02,276 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 409 places, 541 transitions, 7639 flow, removed 5 selfloop flow, removed 7 redundant places. [2024-06-21 21:09:02,281 INFO L231 Difference]: Finished difference. Result has 410 places, 522 transitions, 6351 flow [2024-06-21 21:09:02,282 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6137, PETRI_DIFFERENCE_MINUEND_PLACES=401, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=519, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=455, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6351, PETRI_PLACES=410, PETRI_TRANSITIONS=522} [2024-06-21 21:09:02,282 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 367 predicate places. [2024-06-21 21:09:02,282 INFO L495 AbstractCegarLoop]: Abstraction has has 410 places, 522 transitions, 6351 flow [2024-06-21 21:09:02,282 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:09:02,282 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:09:02,282 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:09:02,283 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable128 [2024-06-21 21:09:02,283 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)] === [2024-06-21 21:09:02,283 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:09:02,283 INFO L85 PathProgramCache]: Analyzing trace with hash -737172993, now seen corresponding path program 3 times [2024-06-21 21:09:02,283 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:09:02,283 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1830098508] [2024-06-21 21:09:02,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:09:02,283 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:09:02,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:09:03,254 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:09:03,255 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:09:03,255 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1830098508] [2024-06-21 21:09:03,255 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1830098508] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:09:03,255 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:09:03,255 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 21:09:03,255 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1856665385] [2024-06-21 21:09:03,255 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:09:03,255 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 21:09:03,255 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:09:03,255 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 21:09:03,256 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2024-06-21 21:09:03,337 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 21:09:03,338 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 410 places, 522 transitions, 6351 flow. Second operand has 11 states, 11 states have (on average 10.454545454545455) internal successors, (115), 11 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) [2024-06-21 21:09:03,338 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:09:03,338 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 21:09:03,338 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:09:05,330 INFO L124 PetriNetUnfolderBase]: 4223/6703 cut-off events. [2024-06-21 21:09:05,330 INFO L125 PetriNetUnfolderBase]: For 1782772/1782772 co-relation queries the response was YES. [2024-06-21 21:09:05,410 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72905 conditions, 6703 events. 4223/6703 cut-off events. For 1782772/1782772 co-relation queries the response was YES. Maximal size of possible extension queue 430. Compared 41427 event pairs, 859 based on Foata normal form. 4/6704 useless extension candidates. Maximal degree in co-relation 72711. Up to 6279 conditions per place. [2024-06-21 21:09:05,440 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 460 selfloop transitions, 83 changer transitions 0/547 dead transitions. [2024-06-21 21:09:05,440 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 418 places, 547 transitions, 8199 flow [2024-06-21 21:09:05,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:09:05,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:09:05,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 156 transitions. [2024-06-21 21:09:05,441 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4126984126984127 [2024-06-21 21:09:05,441 INFO L175 Difference]: Start difference. First operand has 410 places, 522 transitions, 6351 flow. Second operand 9 states and 156 transitions. [2024-06-21 21:09:05,441 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 418 places, 547 transitions, 8199 flow [2024-06-21 21:09:11,434 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 411 places, 547 transitions, 7959 flow, removed 40 selfloop flow, removed 7 redundant places. [2024-06-21 21:09:11,440 INFO L231 Difference]: Finished difference. Result has 412 places, 528 transitions, 6443 flow [2024-06-21 21:09:11,440 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6135, PETRI_DIFFERENCE_MINUEND_PLACES=403, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=522, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=77, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=445, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6443, PETRI_PLACES=412, PETRI_TRANSITIONS=528} [2024-06-21 21:09:11,440 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 369 predicate places. [2024-06-21 21:09:11,440 INFO L495 AbstractCegarLoop]: Abstraction has has 412 places, 528 transitions, 6443 flow [2024-06-21 21:09:11,440 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.454545454545455) internal successors, (115), 11 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) [2024-06-21 21:09:11,441 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:09:11,441 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:09:11,441 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable129 [2024-06-21 21:09:11,441 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)] === [2024-06-21 21:09:11,441 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:09:11,441 INFO L85 PathProgramCache]: Analyzing trace with hash -750564993, now seen corresponding path program 4 times [2024-06-21 21:09:11,441 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:09:11,441 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1009976387] [2024-06-21 21:09:11,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:09:11,441 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:09:11,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:09:12,439 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:09:12,440 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:09:12,440 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1009976387] [2024-06-21 21:09:12,440 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1009976387] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:09:12,440 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:09:12,440 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 21:09:12,440 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1071270808] [2024-06-21 21:09:12,440 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:09:12,440 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 21:09:12,441 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:09:12,441 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 21:09:12,441 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2024-06-21 21:09:12,568 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 21:09:12,568 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 412 places, 528 transitions, 6443 flow. Second operand has 11 states, 11 states have (on average 10.454545454545455) internal successors, (115), 11 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) [2024-06-21 21:09:12,568 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:09:12,568 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 21:09:12,568 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:09:14,531 INFO L124 PetriNetUnfolderBase]: 4211/6686 cut-off events. [2024-06-21 21:09:14,531 INFO L125 PetriNetUnfolderBase]: For 1771175/1771175 co-relation queries the response was YES. [2024-06-21 21:09:14,610 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72259 conditions, 6686 events. 4211/6686 cut-off events. For 1771175/1771175 co-relation queries the response was YES. Maximal size of possible extension queue 428. Compared 41321 event pairs, 991 based on Foata normal form. 4/6688 useless extension candidates. Maximal degree in co-relation 72064. Up to 6477 conditions per place. [2024-06-21 21:09:14,641 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 514 selfloop transitions, 23 changer transitions 0/541 dead transitions. [2024-06-21 21:09:14,642 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 420 places, 541 transitions, 7563 flow [2024-06-21 21:09:14,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:09:14,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:09:14,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 142 transitions. [2024-06-21 21:09:14,643 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37566137566137564 [2024-06-21 21:09:14,643 INFO L175 Difference]: Start difference. First operand has 412 places, 528 transitions, 6443 flow. Second operand 9 states and 142 transitions. [2024-06-21 21:09:14,643 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 420 places, 541 transitions, 7563 flow [2024-06-21 21:09:19,190 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 415 places, 541 transitions, 7314 flow, removed 63 selfloop flow, removed 5 redundant places. [2024-06-21 21:09:19,196 INFO L231 Difference]: Finished difference. Result has 416 places, 528 transitions, 6247 flow [2024-06-21 21:09:19,196 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6194, PETRI_DIFFERENCE_MINUEND_PLACES=407, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=528, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=505, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6247, PETRI_PLACES=416, PETRI_TRANSITIONS=528} [2024-06-21 21:09:19,196 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 373 predicate places. [2024-06-21 21:09:19,196 INFO L495 AbstractCegarLoop]: Abstraction has has 416 places, 528 transitions, 6247 flow [2024-06-21 21:09:19,196 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.454545454545455) internal successors, (115), 11 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) [2024-06-21 21:09:19,197 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:09:19,197 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:09:19,197 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130 [2024-06-21 21:09:19,197 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)] === [2024-06-21 21:09:19,197 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:09:19,197 INFO L85 PathProgramCache]: Analyzing trace with hash -750982563, now seen corresponding path program 5 times [2024-06-21 21:09:19,197 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:09:19,197 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [927966727] [2024-06-21 21:09:19,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:09:19,197 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:09:19,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:09:20,162 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:09:20,162 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:09:20,162 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [927966727] [2024-06-21 21:09:20,162 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [927966727] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:09:20,162 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:09:20,162 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 21:09:20,162 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1462927671] [2024-06-21 21:09:20,162 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:09:20,163 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 21:09:20,163 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:09:20,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 21:09:20,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2024-06-21 21:09:20,250 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 21:09:20,250 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 416 places, 528 transitions, 6247 flow. Second operand has 11 states, 11 states have (on average 10.454545454545455) internal successors, (115), 11 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) [2024-06-21 21:09:20,250 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:09:20,250 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 21:09:20,250 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:09:22,284 INFO L124 PetriNetUnfolderBase]: 4199/6675 cut-off events. [2024-06-21 21:09:22,284 INFO L125 PetriNetUnfolderBase]: For 1758189/1758189 co-relation queries the response was YES. [2024-06-21 21:09:22,361 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71313 conditions, 6675 events. 4199/6675 cut-off events. For 1758189/1758189 co-relation queries the response was YES. Maximal size of possible extension queue 430. Compared 41301 event pairs, 855 based on Foata normal form. 4/6676 useless extension candidates. Maximal degree in co-relation 71117. Up to 6263 conditions per place. [2024-06-21 21:09:22,392 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 464 selfloop transitions, 78 changer transitions 0/546 dead transitions. [2024-06-21 21:09:22,392 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 424 places, 546 transitions, 7427 flow [2024-06-21 21:09:22,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:09:22,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:09:22,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 155 transitions. [2024-06-21 21:09:22,393 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41005291005291006 [2024-06-21 21:09:22,393 INFO L175 Difference]: Start difference. First operand has 416 places, 528 transitions, 6247 flow. Second operand 9 states and 155 transitions. [2024-06-21 21:09:22,393 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 424 places, 546 transitions, 7427 flow [2024-06-21 21:09:27,589 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 411 places, 546 transitions, 7179 flow, removed 24 selfloop flow, removed 13 redundant places. [2024-06-21 21:09:27,595 INFO L231 Difference]: Finished difference. Result has 412 places, 528 transitions, 6161 flow [2024-06-21 21:09:27,595 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5999, PETRI_DIFFERENCE_MINUEND_PLACES=403, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=528, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=450, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6161, PETRI_PLACES=412, PETRI_TRANSITIONS=528} [2024-06-21 21:09:27,595 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 369 predicate places. [2024-06-21 21:09:27,595 INFO L495 AbstractCegarLoop]: Abstraction has has 412 places, 528 transitions, 6161 flow [2024-06-21 21:09:27,595 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.454545454545455) internal successors, (115), 11 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) [2024-06-21 21:09:27,595 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:09:27,596 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:09:27,596 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131 [2024-06-21 21:09:27,596 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)] === [2024-06-21 21:09:27,596 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:09:27,596 INFO L85 PathProgramCache]: Analyzing trace with hash -86150501, now seen corresponding path program 13 times [2024-06-21 21:09:27,596 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:09:27,596 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1907603957] [2024-06-21 21:09:27,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:09:27,596 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:09:27,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:09:28,404 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:09:28,404 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:09:28,404 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1907603957] [2024-06-21 21:09:28,404 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1907603957] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:09:28,404 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:09:28,404 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:09:28,404 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1347564992] [2024-06-21 21:09:28,404 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:09:28,405 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:09:28,405 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:09:28,405 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:09:28,405 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:09:28,483 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 21:09:28,483 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 412 places, 528 transitions, 6161 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:09:28,483 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:09:28,483 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 21:09:28,483 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:09:30,402 INFO L124 PetriNetUnfolderBase]: 4238/6733 cut-off events. [2024-06-21 21:09:30,402 INFO L125 PetriNetUnfolderBase]: For 1739502/1739502 co-relation queries the response was YES. [2024-06-21 21:09:30,475 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70939 conditions, 6733 events. 4238/6733 cut-off events. For 1739502/1739502 co-relation queries the response was YES. Maximal size of possible extension queue 437. Compared 41737 event pairs, 852 based on Foata normal form. 2/6733 useless extension candidates. Maximal degree in co-relation 70745. Up to 6392 conditions per place. [2024-06-21 21:09:30,502 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 485 selfloop transitions, 80 changer transitions 0/569 dead transitions. [2024-06-21 21:09:30,503 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 420 places, 569 transitions, 7565 flow [2024-06-21 21:09:30,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:09:30,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:09:30,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 163 transitions. [2024-06-21 21:09:30,504 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4312169312169312 [2024-06-21 21:09:30,504 INFO L175 Difference]: Start difference. First operand has 412 places, 528 transitions, 6161 flow. Second operand 9 states and 163 transitions. [2024-06-21 21:09:30,504 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 420 places, 569 transitions, 7565 flow [2024-06-21 21:09:35,245 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 411 places, 569 transitions, 7316 flow, removed 19 selfloop flow, removed 9 redundant places. [2024-06-21 21:09:35,251 INFO L231 Difference]: Finished difference. Result has 414 places, 544 transitions, 6318 flow [2024-06-21 21:09:35,251 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5915, PETRI_DIFFERENCE_MINUEND_PLACES=403, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=528, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=451, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6318, PETRI_PLACES=414, PETRI_TRANSITIONS=544} [2024-06-21 21:09:35,251 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 371 predicate places. [2024-06-21 21:09:35,251 INFO L495 AbstractCegarLoop]: Abstraction has has 414 places, 544 transitions, 6318 flow [2024-06-21 21:09:35,252 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:09:35,252 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:09:35,252 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:09:35,252 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132 [2024-06-21 21:09:35,252 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)] === [2024-06-21 21:09:35,252 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:09:35,252 INFO L85 PathProgramCache]: Analyzing trace with hash 933723295, now seen corresponding path program 1 times [2024-06-21 21:09:35,252 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:09:35,252 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [456109300] [2024-06-21 21:09:35,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:09:35,252 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:09:35,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:09:36,295 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:09:36,295 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:09:36,295 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [456109300] [2024-06-21 21:09:36,295 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [456109300] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:09:36,295 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:09:36,296 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:09:36,296 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1425036018] [2024-06-21 21:09:36,296 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:09:36,296 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:09:36,296 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:09:36,296 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:09:36,296 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:09:36,425 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-21 21:09:36,425 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 414 places, 544 transitions, 6318 flow. Second operand has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:09:36,425 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:09:36,425 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-21 21:09:36,425 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:09:38,249 INFO L124 PetriNetUnfolderBase]: 3992/6475 cut-off events. [2024-06-21 21:09:38,249 INFO L125 PetriNetUnfolderBase]: For 1550385/1550385 co-relation queries the response was YES. [2024-06-21 21:09:38,319 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66439 conditions, 6475 events. 3992/6475 cut-off events. For 1550385/1550385 co-relation queries the response was YES. Maximal size of possible extension queue 440. Compared 41438 event pairs, 871 based on Foata normal form. 2/6464 useless extension candidates. Maximal degree in co-relation 66242. Up to 5980 conditions per place. [2024-06-21 21:09:38,345 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 499 selfloop transitions, 29 changer transitions 0/575 dead transitions. [2024-06-21 21:09:38,345 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 423 places, 575 transitions, 7848 flow [2024-06-21 21:09:38,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 21:09:38,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 21:09:38,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 185 transitions. [2024-06-21 21:09:38,346 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44047619047619047 [2024-06-21 21:09:38,346 INFO L175 Difference]: Start difference. First operand has 414 places, 544 transitions, 6318 flow. Second operand 10 states and 185 transitions. [2024-06-21 21:09:38,346 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 423 places, 575 transitions, 7848 flow [2024-06-21 21:09:42,845 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 416 places, 575 transitions, 7606 flow, removed 4 selfloop flow, removed 7 redundant places. [2024-06-21 21:09:42,850 INFO L231 Difference]: Finished difference. Result has 417 places, 548 transitions, 6275 flow [2024-06-21 21:09:42,851 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6076, PETRI_DIFFERENCE_MINUEND_PLACES=407, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=544, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=517, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6275, PETRI_PLACES=417, PETRI_TRANSITIONS=548} [2024-06-21 21:09:42,851 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 374 predicate places. [2024-06-21 21:09:42,851 INFO L495 AbstractCegarLoop]: Abstraction has has 417 places, 548 transitions, 6275 flow [2024-06-21 21:09:42,851 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:09:42,851 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:09:42,851 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:09:42,851 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable133 [2024-06-21 21:09:42,851 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)] === [2024-06-21 21:09:42,852 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:09:42,852 INFO L85 PathProgramCache]: Analyzing trace with hash 933783745, now seen corresponding path program 2 times [2024-06-21 21:09:42,852 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:09:42,852 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2064758316] [2024-06-21 21:09:42,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:09:42,852 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:09:42,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:09:43,890 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:09:43,890 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:09:43,890 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2064758316] [2024-06-21 21:09:43,890 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2064758316] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:09:43,890 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:09:43,890 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:09:43,890 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1853742678] [2024-06-21 21:09:43,891 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:09:43,891 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:09:43,891 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:09:43,891 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:09:43,891 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:09:44,016 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-21 21:09:44,016 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 417 places, 548 transitions, 6275 flow. Second operand has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:09:44,016 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:09:44,016 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-21 21:09:44,016 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:09:45,705 INFO L124 PetriNetUnfolderBase]: 4000/6487 cut-off events. [2024-06-21 21:09:45,705 INFO L125 PetriNetUnfolderBase]: For 1573590/1573590 co-relation queries the response was YES. [2024-06-21 21:09:45,785 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66715 conditions, 6487 events. 4000/6487 cut-off events. For 1573590/1573590 co-relation queries the response was YES. Maximal size of possible extension queue 442. Compared 41528 event pairs, 906 based on Foata normal form. 2/6476 useless extension candidates. Maximal degree in co-relation 66517. Up to 6023 conditions per place. [2024-06-21 21:09:45,814 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 499 selfloop transitions, 26 changer transitions 0/572 dead transitions. [2024-06-21 21:09:45,815 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 426 places, 572 transitions, 7457 flow [2024-06-21 21:09:45,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 21:09:45,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 21:09:45,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 180 transitions. [2024-06-21 21:09:45,815 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-21 21:09:45,815 INFO L175 Difference]: Start difference. First operand has 417 places, 548 transitions, 6275 flow. Second operand 10 states and 180 transitions. [2024-06-21 21:09:45,816 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 426 places, 572 transitions, 7457 flow [2024-06-21 21:09:52,238 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 420 places, 572 transitions, 7310 flow, removed 59 selfloop flow, removed 6 redundant places. [2024-06-21 21:09:52,244 INFO L231 Difference]: Finished difference. Result has 421 places, 550 transitions, 6259 flow [2024-06-21 21:09:52,244 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6156, PETRI_DIFFERENCE_MINUEND_PLACES=411, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=548, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=522, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6259, PETRI_PLACES=421, PETRI_TRANSITIONS=550} [2024-06-21 21:09:52,245 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 378 predicate places. [2024-06-21 21:09:52,245 INFO L495 AbstractCegarLoop]: Abstraction has has 421 places, 550 transitions, 6259 flow [2024-06-21 21:09:52,245 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:09:52,245 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:09:52,245 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:09:52,245 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable134 [2024-06-21 21:09:52,245 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)] === [2024-06-21 21:09:52,245 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:09:52,245 INFO L85 PathProgramCache]: Analyzing trace with hash 933783869, now seen corresponding path program 1 times [2024-06-21 21:09:52,245 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:09:52,245 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1136925947] [2024-06-21 21:09:52,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:09:52,246 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:09:52,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:09:53,324 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:09:53,324 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:09:53,324 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1136925947] [2024-06-21 21:09:53,324 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1136925947] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:09:53,324 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:09:53,324 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 21:09:53,324 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1620365479] [2024-06-21 21:09:53,324 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:09:53,325 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 21:09:53,325 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:09:53,325 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 21:09:53,325 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-21 21:09:53,448 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 21:09:53,448 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 421 places, 550 transitions, 6259 flow. Second operand has 11 states, 11 states have (on average 11.454545454545455) internal successors, (126), 11 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:09:53,448 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:09:53,448 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 21:09:53,448 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:09:55,123 INFO L124 PetriNetUnfolderBase]: 4107/6599 cut-off events. [2024-06-21 21:09:55,123 INFO L125 PetriNetUnfolderBase]: For 1592471/1592471 co-relation queries the response was YES. [2024-06-21 21:09:55,205 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67643 conditions, 6599 events. 4107/6599 cut-off events. For 1592471/1592471 co-relation queries the response was YES. Maximal size of possible extension queue 444. Compared 41674 event pairs, 931 based on Foata normal form. 1/6587 useless extension candidates. Maximal degree in co-relation 67443. Up to 6293 conditions per place. [2024-06-21 21:09:55,235 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 537 selfloop transitions, 31 changer transitions 0/578 dead transitions. [2024-06-21 21:09:55,235 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 430 places, 578 transitions, 7895 flow [2024-06-21 21:09:55,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 21:09:55,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 21:09:55,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 174 transitions. [2024-06-21 21:09:55,236 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4142857142857143 [2024-06-21 21:09:55,236 INFO L175 Difference]: Start difference. First operand has 421 places, 550 transitions, 6259 flow. Second operand 10 states and 174 transitions. [2024-06-21 21:09:55,236 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 430 places, 578 transitions, 7895 flow [2024-06-21 21:10:01,909 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 422 places, 578 transitions, 7812 flow, removed 17 selfloop flow, removed 8 redundant places. [2024-06-21 21:10:01,914 INFO L231 Difference]: Finished difference. Result has 423 places, 556 transitions, 6418 flow [2024-06-21 21:10:01,914 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6176, PETRI_DIFFERENCE_MINUEND_PLACES=413, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=550, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=522, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6418, PETRI_PLACES=423, PETRI_TRANSITIONS=556} [2024-06-21 21:10:01,915 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 380 predicate places. [2024-06-21 21:10:01,915 INFO L495 AbstractCegarLoop]: Abstraction has has 423 places, 556 transitions, 6418 flow [2024-06-21 21:10:01,915 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.454545454545455) internal successors, (126), 11 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:10:01,915 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:10:01,915 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:10:01,915 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable135 [2024-06-21 21:10:01,916 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)] === [2024-06-21 21:10:01,916 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:10:01,916 INFO L85 PathProgramCache]: Analyzing trace with hash 675292315, now seen corresponding path program 2 times [2024-06-21 21:10:01,916 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:10:01,916 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1281962045] [2024-06-21 21:10:01,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:10:01,917 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:10:01,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:10:03,020 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:10:03,020 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:10:03,020 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1281962045] [2024-06-21 21:10:03,020 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1281962045] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:10:03,021 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:10:03,021 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 21:10:03,021 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2145351711] [2024-06-21 21:10:03,021 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:10:03,021 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 21:10:03,021 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:10:03,022 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 21:10:03,022 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-21 21:10:03,128 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 21:10:03,129 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 423 places, 556 transitions, 6418 flow. Second operand has 11 states, 11 states have (on average 11.454545454545455) internal successors, (126), 11 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:10:03,129 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:10:03,129 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 21:10:03,129 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:10:04,800 INFO L124 PetriNetUnfolderBase]: 4112/6606 cut-off events. [2024-06-21 21:10:04,800 INFO L125 PetriNetUnfolderBase]: For 1619273/1619273 co-relation queries the response was YES. [2024-06-21 21:10:04,884 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68321 conditions, 6606 events. 4112/6606 cut-off events. For 1619273/1619273 co-relation queries the response was YES. Maximal size of possible extension queue 445. Compared 41705 event pairs, 931 based on Foata normal form. 1/6594 useless extension candidates. Maximal degree in co-relation 68120. Up to 6321 conditions per place. [2024-06-21 21:10:04,916 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 545 selfloop transitions, 21 changer transitions 0/576 dead transitions. [2024-06-21 21:10:04,916 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 431 places, 576 transitions, 7688 flow [2024-06-21 21:10:04,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:10:04,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:10:04,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 153 transitions. [2024-06-21 21:10:04,917 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40476190476190477 [2024-06-21 21:10:04,917 INFO L175 Difference]: Start difference. First operand has 423 places, 556 transitions, 6418 flow. Second operand 9 states and 153 transitions. [2024-06-21 21:10:04,917 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 431 places, 576 transitions, 7688 flow [2024-06-21 21:10:11,752 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 425 places, 576 transitions, 7533 flow, removed 65 selfloop flow, removed 6 redundant places. [2024-06-21 21:10:11,758 INFO L231 Difference]: Finished difference. Result has 426 places, 559 transitions, 6407 flow [2024-06-21 21:10:11,758 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6289, PETRI_DIFFERENCE_MINUEND_PLACES=417, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=556, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=535, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6407, PETRI_PLACES=426, PETRI_TRANSITIONS=559} [2024-06-21 21:10:11,758 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 383 predicate places. [2024-06-21 21:10:11,758 INFO L495 AbstractCegarLoop]: Abstraction has has 426 places, 559 transitions, 6407 flow [2024-06-21 21:10:11,759 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.454545454545455) internal successors, (126), 11 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:10:11,759 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:10:11,759 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:10:11,759 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable136 [2024-06-21 21:10:11,759 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)] === [2024-06-21 21:10:11,759 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:10:11,759 INFO L85 PathProgramCache]: Analyzing trace with hash 675287665, now seen corresponding path program 3 times [2024-06-21 21:10:11,759 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:10:11,759 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2050007893] [2024-06-21 21:10:11,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:10:11,759 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:10:11,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:10:12,818 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:10:12,819 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:10:12,819 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2050007893] [2024-06-21 21:10:12,819 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2050007893] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:10:12,819 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:10:12,819 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 21:10:12,820 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [649285340] [2024-06-21 21:10:12,820 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:10:12,820 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 21:10:12,820 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:10:12,820 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 21:10:12,821 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-21 21:10:12,975 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 21:10:12,976 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 426 places, 559 transitions, 6407 flow. Second operand has 11 states, 11 states have (on average 11.454545454545455) internal successors, (126), 11 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:10:12,976 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:10:12,976 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 21:10:12,976 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:10:14,600 INFO L124 PetriNetUnfolderBase]: 4109/6602 cut-off events. [2024-06-21 21:10:14,601 INFO L125 PetriNetUnfolderBase]: For 1631230/1631230 co-relation queries the response was YES. [2024-06-21 21:10:14,683 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68220 conditions, 6602 events. 4109/6602 cut-off events. For 1631230/1631230 co-relation queries the response was YES. Maximal size of possible extension queue 445. Compared 41694 event pairs, 931 based on Foata normal form. 1/6590 useless extension candidates. Maximal degree in co-relation 68017. Up to 6311 conditions per place. [2024-06-21 21:10:14,712 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 540 selfloop transitions, 26 changer transitions 0/576 dead transitions. [2024-06-21 21:10:14,712 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 434 places, 576 transitions, 7587 flow [2024-06-21 21:10:14,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:10:14,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:10:14,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 155 transitions. [2024-06-21 21:10:14,713 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41005291005291006 [2024-06-21 21:10:14,713 INFO L175 Difference]: Start difference. First operand has 426 places, 559 transitions, 6407 flow. Second operand 9 states and 155 transitions. [2024-06-21 21:10:14,714 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 434 places, 576 transitions, 7587 flow [2024-06-21 21:10:22,186 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 427 places, 576 transitions, 7457 flow, removed 46 selfloop flow, removed 7 redundant places. [2024-06-21 21:10:22,192 INFO L231 Difference]: Finished difference. Result has 428 places, 559 transitions, 6335 flow [2024-06-21 21:10:22,192 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6277, PETRI_DIFFERENCE_MINUEND_PLACES=419, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=559, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=533, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6335, PETRI_PLACES=428, PETRI_TRANSITIONS=559} [2024-06-21 21:10:22,192 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 385 predicate places. [2024-06-21 21:10:22,192 INFO L495 AbstractCegarLoop]: Abstraction has has 428 places, 559 transitions, 6335 flow [2024-06-21 21:10:22,193 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.454545454545455) internal successors, (126), 11 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:10:22,193 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:10:22,193 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:10:22,193 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137 [2024-06-21 21:10:22,193 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)] === [2024-06-21 21:10:22,193 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:10:22,194 INFO L85 PathProgramCache]: Analyzing trace with hash -387455551, now seen corresponding path program 3 times [2024-06-21 21:10:22,194 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:10:22,194 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2053040891] [2024-06-21 21:10:22,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:10:22,194 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:10:22,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:10:23,311 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:10:23,311 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:10:23,311 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2053040891] [2024-06-21 21:10:23,312 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2053040891] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:10:23,312 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:10:23,312 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 21:10:23,312 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [597009218] [2024-06-21 21:10:23,312 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:10:23,312 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 21:10:23,312 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:10:23,312 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 21:10:23,312 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-06-21 21:10:23,466 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-21 21:10:23,466 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 428 places, 559 transitions, 6335 flow. Second operand has 11 states, 11 states have (on average 12.454545454545455) internal successors, (137), 11 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:10:23,466 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:10:23,466 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-21 21:10:23,466 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:10:25,182 INFO L124 PetriNetUnfolderBase]: 4020/6511 cut-off events. [2024-06-21 21:10:25,182 INFO L125 PetriNetUnfolderBase]: For 1646945/1646945 co-relation queries the response was YES. [2024-06-21 21:10:25,267 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67519 conditions, 6511 events. 4020/6511 cut-off events. For 1646945/1646945 co-relation queries the response was YES. Maximal size of possible extension queue 445. Compared 41570 event pairs, 908 based on Foata normal form. 2/6500 useless extension candidates. Maximal degree in co-relation 67315. Up to 6053 conditions per place. [2024-06-21 21:10:25,298 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 507 selfloop transitions, 20 changer transitions 0/577 dead transitions. [2024-06-21 21:10:25,299 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 436 places, 577 transitions, 7439 flow [2024-06-21 21:10:25,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:10:25,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:10:25,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 161 transitions. [2024-06-21 21:10:25,299 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42592592592592593 [2024-06-21 21:10:25,300 INFO L175 Difference]: Start difference. First operand has 428 places, 559 transitions, 6335 flow. Second operand 9 states and 161 transitions. [2024-06-21 21:10:25,300 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 436 places, 577 transitions, 7439 flow [2024-06-21 21:10:33,093 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 428 places, 577 transitions, 7327 flow, removed 25 selfloop flow, removed 8 redundant places. [2024-06-21 21:10:33,099 INFO L231 Difference]: Finished difference. Result has 429 places, 559 transitions, 6268 flow [2024-06-21 21:10:33,099 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6223, PETRI_DIFFERENCE_MINUEND_PLACES=420, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=559, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=539, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6268, PETRI_PLACES=429, PETRI_TRANSITIONS=559} [2024-06-21 21:10:33,099 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 386 predicate places. [2024-06-21 21:10:33,099 INFO L495 AbstractCegarLoop]: Abstraction has has 429 places, 559 transitions, 6268 flow [2024-06-21 21:10:33,099 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 12.454545454545455) internal successors, (137), 11 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:10:33,100 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:10:33,100 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:10:33,100 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable138 [2024-06-21 21:10:33,100 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)] === [2024-06-21 21:10:33,100 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:10:33,100 INFO L85 PathProgramCache]: Analyzing trace with hash 936585215, now seen corresponding path program 1 times [2024-06-21 21:10:33,100 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:10:33,100 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1647019191] [2024-06-21 21:10:33,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:10:33,100 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:10:33,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:10:33,989 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:10:33,989 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:10:33,989 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1647019191] [2024-06-21 21:10:33,989 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1647019191] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:10:33,989 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:10:33,989 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:10:33,990 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [917450121] [2024-06-21 21:10:33,990 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:10:33,990 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:10:33,990 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:10:33,990 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:10:33,990 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:10:34,090 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 21:10:34,090 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 429 places, 559 transitions, 6268 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:10:34,090 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:10:34,090 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 21:10:34,090 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:10:35,813 INFO L124 PetriNetUnfolderBase]: 4141/6651 cut-off events. [2024-06-21 21:10:35,814 INFO L125 PetriNetUnfolderBase]: For 1676578/1676578 co-relation queries the response was YES. [2024-06-21 21:10:35,899 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68802 conditions, 6651 events. 4141/6651 cut-off events. For 1676578/1676578 co-relation queries the response was YES. Maximal size of possible extension queue 448. Compared 42062 event pairs, 937 based on Foata normal form. 2/6640 useless extension candidates. Maximal degree in co-relation 68597. Up to 6362 conditions per place. [2024-06-21 21:10:35,930 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 549 selfloop transitions, 21 changer transitions 0/580 dead transitions. [2024-06-21 21:10:35,930 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 437 places, 580 transitions, 7542 flow [2024-06-21 21:10:35,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:10:35,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:10:35,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 154 transitions. [2024-06-21 21:10:35,931 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4074074074074074 [2024-06-21 21:10:35,931 INFO L175 Difference]: Start difference. First operand has 429 places, 559 transitions, 6268 flow. Second operand 9 states and 154 transitions. [2024-06-21 21:10:35,931 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 437 places, 580 transitions, 7542 flow [2024-06-21 21:10:44,815 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 429 places, 580 transitions, 7490 flow, removed 3 selfloop flow, removed 8 redundant places. [2024-06-21 21:10:44,822 INFO L231 Difference]: Finished difference. Result has 430 places, 562 transitions, 6352 flow [2024-06-21 21:10:44,823 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6216, PETRI_DIFFERENCE_MINUEND_PLACES=421, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=559, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=538, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6352, PETRI_PLACES=430, PETRI_TRANSITIONS=562} [2024-06-21 21:10:44,823 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 387 predicate places. [2024-06-21 21:10:44,823 INFO L495 AbstractCegarLoop]: Abstraction has has 430 places, 562 transitions, 6352 flow [2024-06-21 21:10:44,824 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:10:44,824 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:10:44,824 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:10:44,824 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable139 [2024-06-21 21:10:44,824 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)] === [2024-06-21 21:10:44,824 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:10:44,824 INFO L85 PathProgramCache]: Analyzing trace with hash 790763161, now seen corresponding path program 2 times [2024-06-21 21:10:44,825 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:10:44,825 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1210396853] [2024-06-21 21:10:44,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:10:44,825 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:10:44,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:10:45,719 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:10:45,719 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:10:45,720 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1210396853] [2024-06-21 21:10:45,720 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1210396853] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:10:45,720 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:10:45,720 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:10:45,720 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1345379575] [2024-06-21 21:10:45,720 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:10:45,720 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:10:45,720 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:10:45,720 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:10:45,720 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:10:45,849 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 21:10:45,849 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 430 places, 562 transitions, 6352 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:10:45,849 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:10:45,849 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 21:10:45,849 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:10:47,598 INFO L124 PetriNetUnfolderBase]: 4172/6700 cut-off events. [2024-06-21 21:10:47,598 INFO L125 PetriNetUnfolderBase]: For 1729781/1729781 co-relation queries the response was YES. [2024-06-21 21:10:47,685 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70236 conditions, 6700 events. 4172/6700 cut-off events. For 1729781/1729781 co-relation queries the response was YES. Maximal size of possible extension queue 451. Compared 42343 event pairs, 940 based on Foata normal form. 2/6689 useless extension candidates. Maximal degree in co-relation 70030. Up to 6286 conditions per place. [2024-06-21 21:10:47,717 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 510 selfloop transitions, 70 changer transitions 0/590 dead transitions. [2024-06-21 21:10:47,717 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 438 places, 590 transitions, 8390 flow [2024-06-21 21:10:47,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:10:47,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:10:47,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 165 transitions. [2024-06-21 21:10:47,718 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4365079365079365 [2024-06-21 21:10:47,718 INFO L175 Difference]: Start difference. First operand has 430 places, 562 transitions, 6352 flow. Second operand 9 states and 165 transitions. [2024-06-21 21:10:47,718 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 438 places, 590 transitions, 8390 flow [2024-06-21 21:10:55,659 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 431 places, 590 transitions, 8276 flow, removed 38 selfloop flow, removed 7 redundant places. [2024-06-21 21:10:55,665 INFO L231 Difference]: Finished difference. Result has 432 places, 571 transitions, 6654 flow [2024-06-21 21:10:55,666 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6238, PETRI_DIFFERENCE_MINUEND_PLACES=423, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=562, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=498, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6654, PETRI_PLACES=432, PETRI_TRANSITIONS=571} [2024-06-21 21:10:55,666 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 389 predicate places. [2024-06-21 21:10:55,666 INFO L495 AbstractCegarLoop]: Abstraction has has 432 places, 571 transitions, 6654 flow [2024-06-21 21:10:55,666 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:10:55,666 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:10:55,666 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:10:55,666 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140 [2024-06-21 21:10:55,666 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)] === [2024-06-21 21:10:55,666 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:10:55,666 INFO L85 PathProgramCache]: Analyzing trace with hash 1052049179, now seen corresponding path program 4 times [2024-06-21 21:10:55,667 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:10:55,667 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [366477442] [2024-06-21 21:10:55,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:10:55,667 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:10:55,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:10:56,727 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:10:56,727 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:10:56,727 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [366477442] [2024-06-21 21:10:56,727 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [366477442] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:10:56,727 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:10:56,727 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 21:10:56,727 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2109193536] [2024-06-21 21:10:56,727 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:10:56,728 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 21:10:56,728 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:10:56,728 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 21:10:56,728 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-06-21 21:10:56,892 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 21:10:56,892 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 432 places, 571 transitions, 6654 flow. Second operand has 11 states, 11 states have (on average 11.454545454545455) internal successors, (126), 11 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:10:56,892 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:10:56,892 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 21:10:56,892 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:10:58,687 INFO L124 PetriNetUnfolderBase]: 4177/6707 cut-off events. [2024-06-21 21:10:58,687 INFO L125 PetriNetUnfolderBase]: For 1744842/1744842 co-relation queries the response was YES. [2024-06-21 21:10:58,773 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70741 conditions, 6707 events. 4177/6707 cut-off events. For 1744842/1744842 co-relation queries the response was YES. Maximal size of possible extension queue 452. Compared 42434 event pairs, 941 based on Foata normal form. 1/6695 useless extension candidates. Maximal degree in co-relation 70534. Up to 6374 conditions per place. [2024-06-21 21:10:58,804 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 524 selfloop transitions, 54 changer transitions 0/588 dead transitions. [2024-06-21 21:10:58,804 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 440 places, 588 transitions, 7942 flow [2024-06-21 21:10:58,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:10:58,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:10:58,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 157 transitions. [2024-06-21 21:10:58,805 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41534391534391535 [2024-06-21 21:10:58,805 INFO L175 Difference]: Start difference. First operand has 432 places, 571 transitions, 6654 flow. Second operand 9 states and 157 transitions. [2024-06-21 21:10:58,805 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 440 places, 588 transitions, 7942 flow [2024-06-21 21:11:06,514 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 436 places, 588 transitions, 7797 flow, removed 53 selfloop flow, removed 4 redundant places. [2024-06-21 21:11:06,521 INFO L231 Difference]: Finished difference. Result has 437 places, 574 transitions, 6723 flow [2024-06-21 21:11:06,522 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6509, PETRI_DIFFERENCE_MINUEND_PLACES=428, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=571, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=517, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6723, PETRI_PLACES=437, PETRI_TRANSITIONS=574} [2024-06-21 21:11:06,522 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 394 predicate places. [2024-06-21 21:11:06,522 INFO L495 AbstractCegarLoop]: Abstraction has has 437 places, 574 transitions, 6723 flow [2024-06-21 21:11:06,522 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.454545454545455) internal successors, (126), 11 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:11:06,522 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:11:06,522 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:11:06,523 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141 [2024-06-21 21:11:06,523 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)] === [2024-06-21 21:11:06,523 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:11:06,523 INFO L85 PathProgramCache]: Analyzing trace with hash 790756651, now seen corresponding path program 3 times [2024-06-21 21:11:06,523 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:11:06,523 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [444830648] [2024-06-21 21:11:06,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:11:06,524 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:11:06,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:11:07,532 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:11:07,532 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:11:07,532 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [444830648] [2024-06-21 21:11:07,532 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [444830648] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:11:07,532 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:11:07,532 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:11:07,533 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [761268510] [2024-06-21 21:11:07,533 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:11:07,533 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:11:07,533 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:11:07,533 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:11:07,533 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:11:07,651 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 21:11:07,651 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 437 places, 574 transitions, 6723 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:11:07,651 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:11:07,651 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 21:11:07,651 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:11:09,378 INFO L124 PetriNetUnfolderBase]: 4187/6723 cut-off events. [2024-06-21 21:11:09,378 INFO L125 PetriNetUnfolderBase]: For 1778677/1778677 co-relation queries the response was YES. [2024-06-21 21:11:09,466 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71429 conditions, 6723 events. 4187/6723 cut-off events. For 1778677/1778677 co-relation queries the response was YES. Maximal size of possible extension queue 454. Compared 42566 event pairs, 940 based on Foata normal form. 2/6712 useless extension candidates. Maximal degree in co-relation 71220. Up to 6303 conditions per place. [2024-06-21 21:11:09,498 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 516 selfloop transitions, 71 changer transitions 0/597 dead transitions. [2024-06-21 21:11:09,498 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 445 places, 597 transitions, 8595 flow [2024-06-21 21:11:09,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:11:09,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:11:09,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 167 transitions. [2024-06-21 21:11:09,499 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4417989417989418 [2024-06-21 21:11:09,499 INFO L175 Difference]: Start difference. First operand has 437 places, 574 transitions, 6723 flow. Second operand 9 states and 167 transitions. [2024-06-21 21:11:09,499 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 445 places, 597 transitions, 8595 flow [2024-06-21 21:11:18,511 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 438 places, 597 transitions, 8403 flow, removed 44 selfloop flow, removed 7 redundant places. [2024-06-21 21:11:18,517 INFO L231 Difference]: Finished difference. Result has 439 places, 577 transitions, 6751 flow [2024-06-21 21:11:18,517 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6531, PETRI_DIFFERENCE_MINUEND_PLACES=430, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=574, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=506, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6751, PETRI_PLACES=439, PETRI_TRANSITIONS=577} [2024-06-21 21:11:18,517 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 396 predicate places. [2024-06-21 21:11:18,518 INFO L495 AbstractCegarLoop]: Abstraction has has 439 places, 577 transitions, 6751 flow [2024-06-21 21:11:18,518 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:11:18,518 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:11:18,518 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:11:18,518 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142 [2024-06-21 21:11:18,518 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)] === [2024-06-21 21:11:18,518 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:11:18,518 INFO L85 PathProgramCache]: Analyzing trace with hash 790578835, now seen corresponding path program 5 times [2024-06-21 21:11:18,518 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:11:18,518 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1954725103] [2024-06-21 21:11:18,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:11:18,519 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:11:18,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:11:19,502 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:11:19,503 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:11:19,503 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1954725103] [2024-06-21 21:11:19,503 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1954725103] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:11:19,503 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:11:19,503 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:11:19,503 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1705540312] [2024-06-21 21:11:19,503 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:11:19,503 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:11:19,503 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:11:19,503 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:11:19,504 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:11:19,647 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 21:11:19,647 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 439 places, 577 transitions, 6751 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:11:19,647 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:11:19,647 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 21:11:19,647 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:11:21,371 INFO L124 PetriNetUnfolderBase]: 4176/6701 cut-off events. [2024-06-21 21:11:21,371 INFO L125 PetriNetUnfolderBase]: For 1789669/1789669 co-relation queries the response was YES. [2024-06-21 21:11:21,457 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71397 conditions, 6701 events. 4176/6701 cut-off events. For 1789669/1789669 co-relation queries the response was YES. Maximal size of possible extension queue 456. Compared 42386 event pairs, 935 based on Foata normal form. 1/6689 useless extension candidates. Maximal degree in co-relation 71187. Up to 6358 conditions per place. [2024-06-21 21:11:21,487 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 527 selfloop transitions, 61 changer transitions 0/598 dead transitions. [2024-06-21 21:11:21,487 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 447 places, 598 transitions, 8453 flow [2024-06-21 21:11:21,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:11:21,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:11:21,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 160 transitions. [2024-06-21 21:11:21,489 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42328042328042326 [2024-06-21 21:11:21,489 INFO L175 Difference]: Start difference. First operand has 439 places, 577 transitions, 6751 flow. Second operand 9 states and 160 transitions. [2024-06-21 21:11:21,489 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 447 places, 598 transitions, 8453 flow [2024-06-21 21:11:28,522 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 441 places, 598 transitions, 8273 flow, removed 30 selfloop flow, removed 6 redundant places. [2024-06-21 21:11:28,528 INFO L231 Difference]: Finished difference. Result has 442 places, 583 transitions, 6905 flow [2024-06-21 21:11:28,529 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6571, PETRI_DIFFERENCE_MINUEND_PLACES=433, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=577, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=519, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6905, PETRI_PLACES=442, PETRI_TRANSITIONS=583} [2024-06-21 21:11:28,529 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 399 predicate places. [2024-06-21 21:11:28,529 INFO L495 AbstractCegarLoop]: Abstraction has has 442 places, 583 transitions, 6905 flow [2024-06-21 21:11:28,529 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:11:28,530 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:11:28,530 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:11:28,530 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143 [2024-06-21 21:11:28,530 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)] === [2024-06-21 21:11:28,530 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:11:28,530 INFO L85 PathProgramCache]: Analyzing trace with hash 1051871425, now seen corresponding path program 4 times [2024-06-21 21:11:28,531 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:11:28,531 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1883975054] [2024-06-21 21:11:28,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:11:28,531 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:11:28,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:11:29,571 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:11:29,571 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:11:29,571 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1883975054] [2024-06-21 21:11:29,572 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1883975054] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:11:29,572 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:11:29,572 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:11:29,572 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [963371293] [2024-06-21 21:11:29,572 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:11:29,572 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:11:29,572 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:11:29,572 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:11:29,572 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:11:29,709 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-21 21:11:29,710 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 442 places, 583 transitions, 6905 flow. Second operand has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:11:29,710 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:11:29,710 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-21 21:11:29,710 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:11:31,444 INFO L124 PetriNetUnfolderBase]: 4097/6626 cut-off events. [2024-06-21 21:11:31,444 INFO L125 PetriNetUnfolderBase]: For 1833947/1833947 co-relation queries the response was YES. [2024-06-21 21:11:31,531 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71576 conditions, 6626 events. 4097/6626 cut-off events. For 1833947/1833947 co-relation queries the response was YES. Maximal size of possible extension queue 458. Compared 42368 event pairs, 912 based on Foata normal form. 2/6615 useless extension candidates. Maximal degree in co-relation 71365. Up to 6140 conditions per place. [2024-06-21 21:11:31,562 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 515 selfloop transitions, 32 changer transitions 0/600 dead transitions. [2024-06-21 21:11:31,562 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 450 places, 600 transitions, 8119 flow [2024-06-21 21:11:31,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:11:31,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:11:31,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 162 transitions. [2024-06-21 21:11:31,563 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-21 21:11:31,563 INFO L175 Difference]: Start difference. First operand has 442 places, 583 transitions, 6905 flow. Second operand 9 states and 162 transitions. [2024-06-21 21:11:31,563 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 450 places, 600 transitions, 8119 flow [2024-06-21 21:11:41,289 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 445 places, 600 transitions, 7926 flow, removed 68 selfloop flow, removed 5 redundant places. [2024-06-21 21:11:41,295 INFO L231 Difference]: Finished difference. Result has 446 places, 585 transitions, 6865 flow [2024-06-21 21:11:41,295 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6712, PETRI_DIFFERENCE_MINUEND_PLACES=437, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=583, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=551, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6865, PETRI_PLACES=446, PETRI_TRANSITIONS=585} [2024-06-21 21:11:41,296 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 403 predicate places. [2024-06-21 21:11:41,296 INFO L495 AbstractCegarLoop]: Abstraction has has 446 places, 585 transitions, 6865 flow [2024-06-21 21:11:41,296 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:11:41,296 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:11:41,296 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:11:41,296 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable144 [2024-06-21 21:11:41,296 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)] === [2024-06-21 21:11:41,296 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:11:41,296 INFO L85 PathProgramCache]: Analyzing trace with hash 790583485, now seen corresponding path program 6 times [2024-06-21 21:11:41,296 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:11:41,297 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [38041004] [2024-06-21 21:11:41,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:11:41,297 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:11:41,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:11:42,292 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:11:42,292 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:11:42,292 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [38041004] [2024-06-21 21:11:42,292 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [38041004] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:11:42,292 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:11:42,292 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:11:42,292 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [826881421] [2024-06-21 21:11:42,292 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:11:42,292 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:11:42,293 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:11:42,293 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:11:42,293 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:11:42,385 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 21:11:42,386 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 446 places, 585 transitions, 6865 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:11:42,386 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:11:42,386 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 21:11:42,386 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:11:44,063 INFO L124 PetriNetUnfolderBase]: 4205/6749 cut-off events. [2024-06-21 21:11:44,064 INFO L125 PetriNetUnfolderBase]: For 1843239/1843239 co-relation queries the response was YES. [2024-06-21 21:11:44,151 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72687 conditions, 6749 events. 4205/6749 cut-off events. For 1843239/1843239 co-relation queries the response was YES. Maximal size of possible extension queue 458. Compared 42701 event pairs, 941 based on Foata normal form. 1/6737 useless extension candidates. Maximal degree in co-relation 72474. Up to 6414 conditions per place. [2024-06-21 21:11:44,182 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 536 selfloop transitions, 53 changer transitions 0/599 dead transitions. [2024-06-21 21:11:44,182 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 454 places, 599 transitions, 8081 flow [2024-06-21 21:11:44,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:11:44,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:11:44,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 158 transitions. [2024-06-21 21:11:44,183 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41798941798941797 [2024-06-21 21:11:44,183 INFO L175 Difference]: Start difference. First operand has 446 places, 585 transitions, 6865 flow. Second operand 9 states and 158 transitions. [2024-06-21 21:11:44,183 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 454 places, 599 transitions, 8081 flow [2024-06-21 21:11:50,091 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 447 places, 599 transitions, 7902 flow, removed 59 selfloop flow, removed 7 redundant places. [2024-06-21 21:11:50,097 INFO L231 Difference]: Finished difference. Result has 448 places, 585 transitions, 6798 flow [2024-06-21 21:11:50,097 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6686, PETRI_DIFFERENCE_MINUEND_PLACES=439, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=585, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=532, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6798, PETRI_PLACES=448, PETRI_TRANSITIONS=585} [2024-06-21 21:11:50,098 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 405 predicate places. [2024-06-21 21:11:50,098 INFO L495 AbstractCegarLoop]: Abstraction has has 448 places, 585 transitions, 6798 flow [2024-06-21 21:11:50,098 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:11:50,098 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:11:50,098 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:11:50,098 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable145 [2024-06-21 21:11:50,098 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)] === [2024-06-21 21:11:50,098 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:11:50,098 INFO L85 PathProgramCache]: Analyzing trace with hash 1051876385, now seen corresponding path program 4 times [2024-06-21 21:11:50,098 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:11:50,098 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1629855283] [2024-06-21 21:11:50,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:11:50,099 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:11:50,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:11:51,031 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:11:51,031 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:11:51,031 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1629855283] [2024-06-21 21:11:51,032 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1629855283] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:11:51,032 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:11:51,032 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 21:11:51,032 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [776303746] [2024-06-21 21:11:51,032 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:11:51,032 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 21:11:51,032 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:11:51,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 21:11:51,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2024-06-21 21:11:51,124 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 21:11:51,124 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 448 places, 585 transitions, 6798 flow. Second operand has 11 states, 11 states have (on average 11.454545454545455) internal successors, (126), 11 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:11:51,124 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:11:51,124 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 21:11:51,124 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:11:52,851 INFO L124 PetriNetUnfolderBase]: 4175/6701 cut-off events. [2024-06-21 21:11:52,851 INFO L125 PetriNetUnfolderBase]: For 1840533/1840533 co-relation queries the response was YES. [2024-06-21 21:11:52,938 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71710 conditions, 6701 events. 4175/6701 cut-off events. For 1840533/1840533 co-relation queries the response was YES. Maximal size of possible extension queue 458. Compared 42367 event pairs, 933 based on Foata normal form. 2/6690 useless extension candidates. Maximal degree in co-relation 71496. Up to 6288 conditions per place. [2024-06-21 21:11:52,969 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 524 selfloop transitions, 70 changer transitions 0/604 dead transitions. [2024-06-21 21:11:52,970 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 456 places, 604 transitions, 8334 flow [2024-06-21 21:11:52,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:11:52,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:11:52,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 167 transitions. [2024-06-21 21:11:52,971 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4417989417989418 [2024-06-21 21:11:52,971 INFO L175 Difference]: Start difference. First operand has 448 places, 585 transitions, 6798 flow. Second operand 9 states and 167 transitions. [2024-06-21 21:11:52,971 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 456 places, 604 transitions, 8334 flow [2024-06-21 21:11:59,167 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 448 places, 604 transitions, 8160 flow, removed 30 selfloop flow, removed 8 redundant places. [2024-06-21 21:11:59,175 INFO L231 Difference]: Finished difference. Result has 449 places, 585 transitions, 6770 flow [2024-06-21 21:11:59,175 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6624, PETRI_DIFFERENCE_MINUEND_PLACES=440, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=585, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=515, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6770, PETRI_PLACES=449, PETRI_TRANSITIONS=585} [2024-06-21 21:11:59,176 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 406 predicate places. [2024-06-21 21:11:59,176 INFO L495 AbstractCegarLoop]: Abstraction has has 449 places, 585 transitions, 6770 flow [2024-06-21 21:11:59,176 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.454545454545455) internal successors, (126), 11 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:11:59,176 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:11:59,176 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:11:59,176 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable146 [2024-06-21 21:11:59,177 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)] === [2024-06-21 21:11:59,177 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:11:59,177 INFO L85 PathProgramCache]: Analyzing trace with hash -1102386597, now seen corresponding path program 7 times [2024-06-21 21:11:59,177 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:11:59,177 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1208882896] [2024-06-21 21:11:59,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:11:59,178 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:11:59,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:12:00,270 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:12:00,270 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:12:00,270 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1208882896] [2024-06-21 21:12:00,270 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1208882896] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:12:00,270 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:12:00,270 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:12:00,270 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [569552984] [2024-06-21 21:12:00,270 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:12:00,271 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:12:00,271 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:12:00,271 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:12:00,271 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:12:00,368 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 21:12:00,368 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 449 places, 585 transitions, 6770 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:12:00,368 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:12:00,368 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 21:12:00,369 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:12:02,152 INFO L124 PetriNetUnfolderBase]: 4180/6708 cut-off events. [2024-06-21 21:12:02,152 INFO L125 PetriNetUnfolderBase]: For 1852826/1852826 co-relation queries the response was YES. [2024-06-21 21:12:02,241 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71953 conditions, 6708 events. 4180/6708 cut-off events. For 1852826/1852826 co-relation queries the response was YES. Maximal size of possible extension queue 459. Compared 42407 event pairs, 932 based on Foata normal form. 1/6696 useless extension candidates. Maximal degree in co-relation 71738. Up to 6403 conditions per place. [2024-06-21 21:12:02,273 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 553 selfloop transitions, 40 changer transitions 0/603 dead transitions. [2024-06-21 21:12:02,273 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 458 places, 603 transitions, 8496 flow [2024-06-21 21:12:02,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 21:12:02,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 21:12:02,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 163 transitions. [2024-06-21 21:12:02,274 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3880952380952381 [2024-06-21 21:12:02,274 INFO L175 Difference]: Start difference. First operand has 449 places, 585 transitions, 6770 flow. Second operand 10 states and 163 transitions. [2024-06-21 21:12:02,275 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 458 places, 603 transitions, 8496 flow [2024-06-21 21:12:11,107 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 449 places, 603 transitions, 8316 flow, removed 5 selfloop flow, removed 9 redundant places. [2024-06-21 21:12:11,113 INFO L231 Difference]: Finished difference. Result has 450 places, 591 transitions, 6898 flow [2024-06-21 21:12:11,113 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6590, PETRI_DIFFERENCE_MINUEND_PLACES=440, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=585, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=548, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6898, PETRI_PLACES=450, PETRI_TRANSITIONS=591} [2024-06-21 21:12:11,114 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 407 predicate places. [2024-06-21 21:12:11,114 INFO L495 AbstractCegarLoop]: Abstraction has has 450 places, 591 transitions, 6898 flow [2024-06-21 21:12:11,114 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:12:11,114 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:12:11,114 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:12:11,114 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable147 [2024-06-21 21:12:11,114 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)] === [2024-06-21 21:12:11,115 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:12:11,115 INFO L85 PathProgramCache]: Analyzing trace with hash -523429695, now seen corresponding path program 5 times [2024-06-21 21:12:11,115 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:12:11,115 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1087740574] [2024-06-21 21:12:11,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:12:11,115 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:12:11,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:12:12,161 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:12:12,161 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:12:12,161 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1087740574] [2024-06-21 21:12:12,161 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1087740574] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:12:12,161 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:12:12,161 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 21:12:12,161 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1173723253] [2024-06-21 21:12:12,161 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:12:12,161 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 21:12:12,162 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:12:12,162 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 21:12:12,162 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-21 21:12:12,293 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-21 21:12:12,293 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 450 places, 591 transitions, 6898 flow. Second operand has 11 states, 11 states have (on average 12.454545454545455) internal successors, (137), 11 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:12:12,293 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:12:12,293 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-21 21:12:12,294 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:12:14,041 INFO L124 PetriNetUnfolderBase]: 4088/6614 cut-off events. [2024-06-21 21:12:14,041 INFO L125 PetriNetUnfolderBase]: For 1875193/1875193 co-relation queries the response was YES. [2024-06-21 21:12:14,129 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71584 conditions, 6614 events. 4088/6614 cut-off events. For 1875193/1875193 co-relation queries the response was YES. Maximal size of possible extension queue 459. Compared 42281 event pairs, 909 based on Foata normal form. 2/6603 useless extension candidates. Maximal degree in co-relation 71368. Up to 6154 conditions per place. [2024-06-21 21:12:14,159 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 530 selfloop transitions, 20 changer transitions 0/605 dead transitions. [2024-06-21 21:12:14,160 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 458 places, 605 transitions, 8114 flow [2024-06-21 21:12:14,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:12:14,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:12:14,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 155 transitions. [2024-06-21 21:12:14,161 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41005291005291006 [2024-06-21 21:12:14,161 INFO L175 Difference]: Start difference. First operand has 450 places, 591 transitions, 6898 flow. Second operand 9 states and 155 transitions. [2024-06-21 21:12:14,161 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 458 places, 605 transitions, 8114 flow [2024-06-21 21:12:21,263 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 452 places, 605 transitions, 7925 flow, removed 75 selfloop flow, removed 6 redundant places. [2024-06-21 21:12:21,271 INFO L231 Difference]: Finished difference. Result has 453 places, 593 transitions, 6844 flow [2024-06-21 21:12:21,271 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6709, PETRI_DIFFERENCE_MINUEND_PLACES=444, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=591, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=571, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6844, PETRI_PLACES=453, PETRI_TRANSITIONS=593} [2024-06-21 21:12:21,271 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 410 predicate places. [2024-06-21 21:12:21,272 INFO L495 AbstractCegarLoop]: Abstraction has has 453 places, 593 transitions, 6844 flow [2024-06-21 21:12:21,272 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 12.454545454545455) internal successors, (137), 11 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:12:21,272 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:12:21,272 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:12:21,272 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable148 [2024-06-21 21:12:21,272 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)] === [2024-06-21 21:12:21,273 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:12:21,273 INFO L85 PathProgramCache]: Analyzing trace with hash -523424921, now seen corresponding path program 8 times [2024-06-21 21:12:21,273 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:12:21,273 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1979346427] [2024-06-21 21:12:21,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:12:21,274 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:12:21,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:12:22,326 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:12:22,326 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:12:22,326 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1979346427] [2024-06-21 21:12:22,326 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1979346427] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:12:22,326 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:12:22,326 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:12:22,326 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [926054598] [2024-06-21 21:12:22,326 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:12:22,326 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:12:22,326 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:12:22,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:12:22,327 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:12:22,484 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 21:12:22,484 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 453 places, 593 transitions, 6844 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:12:22,484 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:12:22,484 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 21:12:22,484 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:12:24,449 INFO L124 PetriNetUnfolderBase]: 4204/6748 cut-off events. [2024-06-21 21:12:24,450 INFO L125 PetriNetUnfolderBase]: For 1895072/1895072 co-relation queries the response was YES. [2024-06-21 21:12:24,537 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72899 conditions, 6748 events. 4204/6748 cut-off events. For 1895072/1895072 co-relation queries the response was YES. Maximal size of possible extension queue 460. Compared 42659 event pairs, 937 based on Foata normal form. 1/6736 useless extension candidates. Maximal degree in co-relation 72681. Up to 6452 conditions per place. [2024-06-21 21:12:24,569 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 563 selfloop transitions, 34 changer transitions 0/607 dead transitions. [2024-06-21 21:12:24,569 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 461 places, 607 transitions, 8132 flow [2024-06-21 21:12:24,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:12:24,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:12:24,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 150 transitions. [2024-06-21 21:12:24,570 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3968253968253968 [2024-06-21 21:12:24,570 INFO L175 Difference]: Start difference. First operand has 453 places, 593 transitions, 6844 flow. Second operand 9 states and 150 transitions. [2024-06-21 21:12:24,570 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 461 places, 607 transitions, 8132 flow [2024-06-21 21:12:33,470 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 454 places, 607 transitions, 8013 flow, removed 41 selfloop flow, removed 7 redundant places. [2024-06-21 21:12:33,476 INFO L231 Difference]: Finished difference. Result has 455 places, 596 transitions, 6871 flow [2024-06-21 21:12:33,477 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6725, PETRI_DIFFERENCE_MINUEND_PLACES=446, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=593, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=559, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6871, PETRI_PLACES=455, PETRI_TRANSITIONS=596} [2024-06-21 21:12:33,477 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 412 predicate places. [2024-06-21 21:12:33,477 INFO L495 AbstractCegarLoop]: Abstraction has has 455 places, 596 transitions, 6871 flow [2024-06-21 21:12:33,477 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:12:33,477 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:12:33,478 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:12:33,478 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable149 [2024-06-21 21:12:33,478 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)] === [2024-06-21 21:12:33,478 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:12:33,478 INFO L85 PathProgramCache]: Analyzing trace with hash -736988729, now seen corresponding path program 5 times [2024-06-21 21:12:33,479 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:12:33,479 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [536693018] [2024-06-21 21:12:33,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:12:33,479 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:12:33,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:12:34,293 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:12:34,293 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:12:34,293 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [536693018] [2024-06-21 21:12:34,293 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [536693018] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:12:34,293 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:12:34,293 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:12:34,293 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [524219756] [2024-06-21 21:12:34,294 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:12:34,294 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:12:34,294 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:12:34,294 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:12:34,294 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:12:34,436 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 21:12:34,436 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 455 places, 596 transitions, 6871 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:12:34,437 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:12:34,437 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 21:12:34,437 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:12:36,279 INFO L124 PetriNetUnfolderBase]: 4193/6725 cut-off events. [2024-06-21 21:12:36,280 INFO L125 PetriNetUnfolderBase]: For 1926487/1926487 co-relation queries the response was YES. [2024-06-21 21:12:36,371 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72579 conditions, 6725 events. 4193/6725 cut-off events. For 1926487/1926487 co-relation queries the response was YES. Maximal size of possible extension queue 462. Compared 42493 event pairs, 933 based on Foata normal form. 3/6715 useless extension candidates. Maximal degree in co-relation 72360. Up to 6434 conditions per place. [2024-06-21 21:12:36,405 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 579 selfloop transitions, 23 changer transitions 0/612 dead transitions. [2024-06-21 21:12:36,405 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 463 places, 612 transitions, 8203 flow [2024-06-21 21:12:36,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:12:36,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:12:36,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 149 transitions. [2024-06-21 21:12:36,406 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3941798941798942 [2024-06-21 21:12:36,406 INFO L175 Difference]: Start difference. First operand has 455 places, 596 transitions, 6871 flow. Second operand 9 states and 149 transitions. [2024-06-21 21:12:36,406 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 463 places, 612 transitions, 8203 flow [2024-06-21 21:12:44,893 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 456 places, 612 transitions, 8085 flow, removed 27 selfloop flow, removed 7 redundant places. [2024-06-21 21:12:44,899 INFO L231 Difference]: Finished difference. Result has 457 places, 599 transitions, 6903 flow [2024-06-21 21:12:44,899 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6753, PETRI_DIFFERENCE_MINUEND_PLACES=448, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=596, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=573, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6903, PETRI_PLACES=457, PETRI_TRANSITIONS=599} [2024-06-21 21:12:44,899 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 414 predicate places. [2024-06-21 21:12:44,899 INFO L495 AbstractCegarLoop]: Abstraction has has 457 places, 599 transitions, 6903 flow [2024-06-21 21:12:44,899 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:12:44,899 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:12:44,899 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:12:44,899 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable150 [2024-06-21 21:12:44,900 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)] === [2024-06-21 21:12:44,900 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:12:44,900 INFO L85 PathProgramCache]: Analyzing trace with hash 962658405, now seen corresponding path program 6 times [2024-06-21 21:12:44,900 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:12:44,900 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1229123909] [2024-06-21 21:12:44,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:12:44,900 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:12:44,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:12:45,784 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:12:45,784 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:12:45,784 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1229123909] [2024-06-21 21:12:45,784 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1229123909] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:12:45,784 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:12:45,784 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 21:12:45,784 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1636409433] [2024-06-21 21:12:45,784 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:12:45,785 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 21:12:45,785 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:12:45,785 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 21:12:45,785 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2024-06-21 21:12:45,891 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 21:12:45,891 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 457 places, 599 transitions, 6903 flow. Second operand has 11 states, 11 states have (on average 11.454545454545455) internal successors, (126), 11 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:12:45,891 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:12:45,891 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 21:12:45,891 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:12:47,848 INFO L124 PetriNetUnfolderBase]: 4219/6763 cut-off events. [2024-06-21 21:12:47,848 INFO L125 PetriNetUnfolderBase]: For 1965177/1965177 co-relation queries the response was YES. [2024-06-21 21:12:48,234 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73526 conditions, 6763 events. 4219/6763 cut-off events. For 1965177/1965177 co-relation queries the response was YES. Maximal size of possible extension queue 466. Compared 42741 event pairs, 936 based on Foata normal form. 2/6752 useless extension candidates. Maximal degree in co-relation 73306. Up to 6441 conditions per place. [2024-06-21 21:12:48,264 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 575 selfloop transitions, 35 changer transitions 0/620 dead transitions. [2024-06-21 21:12:48,265 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 465 places, 620 transitions, 8663 flow [2024-06-21 21:12:48,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:12:48,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:12:48,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 155 transitions. [2024-06-21 21:12:48,265 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41005291005291006 [2024-06-21 21:12:48,266 INFO L175 Difference]: Start difference. First operand has 457 places, 599 transitions, 6903 flow. Second operand 9 states and 155 transitions. [2024-06-21 21:12:48,266 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 465 places, 620 transitions, 8663 flow [2024-06-21 21:12:57,294 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 458 places, 620 transitions, 8541 flow, removed 40 selfloop flow, removed 7 redundant places. [2024-06-21 21:12:57,300 INFO L231 Difference]: Finished difference. Result has 459 places, 605 transitions, 7059 flow [2024-06-21 21:12:57,301 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6781, PETRI_DIFFERENCE_MINUEND_PLACES=450, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=599, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=567, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7059, PETRI_PLACES=459, PETRI_TRANSITIONS=605} [2024-06-21 21:12:57,301 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 416 predicate places. [2024-06-21 21:12:57,301 INFO L495 AbstractCegarLoop]: Abstraction has has 459 places, 605 transitions, 7059 flow [2024-06-21 21:12:57,301 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.454545454545455) internal successors, (126), 11 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:12:57,301 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:12:57,301 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:12:57,301 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151 [2024-06-21 21:12:57,301 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)] === [2024-06-21 21:12:57,302 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:12:57,302 INFO L85 PathProgramCache]: Analyzing trace with hash -523424735, now seen corresponding path program 7 times [2024-06-21 21:12:57,302 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:12:57,302 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1799496867] [2024-06-21 21:12:57,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:12:57,302 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:12:57,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:12:58,369 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:12:58,369 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:12:58,369 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1799496867] [2024-06-21 21:12:58,369 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1799496867] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:12:58,369 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:12:58,369 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 21:12:58,370 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2072428723] [2024-06-21 21:12:58,370 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:12:58,370 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 21:12:58,370 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:12:58,370 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 21:12:58,370 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2024-06-21 21:12:58,489 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 21:12:58,489 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 459 places, 605 transitions, 7059 flow. Second operand has 11 states, 11 states have (on average 11.454545454545455) internal successors, (126), 11 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:12:58,489 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:12:58,490 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 21:12:58,490 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:13:00,362 INFO L124 PetriNetUnfolderBase]: 4229/6779 cut-off events. [2024-06-21 21:13:00,363 INFO L125 PetriNetUnfolderBase]: For 1988791/1988791 co-relation queries the response was YES. [2024-06-21 21:13:00,456 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73740 conditions, 6779 events. 4229/6779 cut-off events. For 1988791/1988791 co-relation queries the response was YES. Maximal size of possible extension queue 468. Compared 42835 event pairs, 931 based on Foata normal form. 2/6768 useless extension candidates. Maximal degree in co-relation 73519. Up to 6415 conditions per place. [2024-06-21 21:13:00,488 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 558 selfloop transitions, 55 changer transitions 0/623 dead transitions. [2024-06-21 21:13:00,489 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 467 places, 623 transitions, 8735 flow [2024-06-21 21:13:00,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:13:00,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:13:00,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 157 transitions. [2024-06-21 21:13:00,489 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41534391534391535 [2024-06-21 21:13:00,490 INFO L175 Difference]: Start difference. First operand has 459 places, 605 transitions, 7059 flow. Second operand 9 states and 157 transitions. [2024-06-21 21:13:00,490 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 467 places, 623 transitions, 8735 flow [2024-06-21 21:13:10,079 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 462 places, 623 transitions, 8597 flow, removed 53 selfloop flow, removed 5 redundant places. [2024-06-21 21:13:10,085 INFO L231 Difference]: Finished difference. Result has 463 places, 608 transitions, 7141 flow [2024-06-21 21:13:10,085 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6921, PETRI_DIFFERENCE_MINUEND_PLACES=454, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=605, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=553, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7141, PETRI_PLACES=463, PETRI_TRANSITIONS=608} [2024-06-21 21:13:10,085 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 420 predicate places. [2024-06-21 21:13:10,085 INFO L495 AbstractCegarLoop]: Abstraction has has 463 places, 608 transitions, 7141 flow [2024-06-21 21:13:10,085 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.454545454545455) internal successors, (126), 11 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:13:10,085 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:13:10,085 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:13:10,086 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152 [2024-06-21 21:13:10,086 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)] === [2024-06-21 21:13:10,086 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:13:10,086 INFO L85 PathProgramCache]: Analyzing trace with hash -523245245, now seen corresponding path program 8 times [2024-06-21 21:13:10,086 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:13:10,086 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1111404411] [2024-06-21 21:13:10,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:13:10,086 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:13:10,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:13:10,963 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:13:10,963 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:13:10,963 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1111404411] [2024-06-21 21:13:10,963 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1111404411] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:13:10,963 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:13:10,963 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:13:10,964 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1391328469] [2024-06-21 21:13:10,964 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:13:10,964 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:13:10,964 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:13:10,964 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:13:10,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:13:11,091 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 21:13:11,092 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 463 places, 608 transitions, 7141 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:13:11,092 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:13:11,092 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 21:13:11,092 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:13:13,488 INFO L124 PetriNetUnfolderBase]: 4239/6795 cut-off events. [2024-06-21 21:13:13,497 INFO L125 PetriNetUnfolderBase]: For 2012758/2012758 co-relation queries the response was YES. [2024-06-21 21:13:13,581 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74066 conditions, 6795 events. 4239/6795 cut-off events. For 2012758/2012758 co-relation queries the response was YES. Maximal size of possible extension queue 470. Compared 43041 event pairs, 936 based on Foata normal form. 2/6784 useless extension candidates. Maximal degree in co-relation 73843. Up to 6425 conditions per place. [2024-06-21 21:13:13,608 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 561 selfloop transitions, 56 changer transitions 0/627 dead transitions. [2024-06-21 21:13:13,608 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 471 places, 627 transitions, 9141 flow [2024-06-21 21:13:13,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:13:13,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:13:13,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 159 transitions. [2024-06-21 21:13:13,609 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42063492063492064 [2024-06-21 21:13:13,609 INFO L175 Difference]: Start difference. First operand has 463 places, 608 transitions, 7141 flow. Second operand 9 states and 159 transitions. [2024-06-21 21:13:13,609 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 471 places, 627 transitions, 9141 flow [2024-06-21 21:13:24,272 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 464 places, 627 transitions, 8888 flow, removed 62 selfloop flow, removed 7 redundant places. [2024-06-21 21:13:24,278 INFO L231 Difference]: Finished difference. Result has 465 places, 611 transitions, 7116 flow [2024-06-21 21:13:24,278 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6908, PETRI_DIFFERENCE_MINUEND_PLACES=456, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=608, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=555, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7116, PETRI_PLACES=465, PETRI_TRANSITIONS=611} [2024-06-21 21:13:24,278 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 422 predicate places. [2024-06-21 21:13:24,278 INFO L495 AbstractCegarLoop]: Abstraction has has 465 places, 611 transitions, 7116 flow [2024-06-21 21:13:24,278 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:13:24,278 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:13:24,278 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:13:24,279 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable153 [2024-06-21 21:13:24,279 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)] === [2024-06-21 21:13:24,279 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:13:24,279 INFO L85 PathProgramCache]: Analyzing trace with hash -516995831, now seen corresponding path program 9 times [2024-06-21 21:13:24,279 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:13:24,279 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1961642115] [2024-06-21 21:13:24,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:13:24,279 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:13:24,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:13:25,226 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:13:25,226 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:13:25,226 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1961642115] [2024-06-21 21:13:25,226 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1961642115] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:13:25,226 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:13:25,226 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:13:25,226 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1760304608] [2024-06-21 21:13:25,226 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:13:25,227 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:13:25,227 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:13:25,227 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:13:25,227 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:13:25,346 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 21:13:25,346 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 465 places, 611 transitions, 7116 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:13:25,346 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:13:25,346 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 21:13:25,346 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:13:27,809 INFO L124 PetriNetUnfolderBase]: 4244/6802 cut-off events. [2024-06-21 21:13:27,809 INFO L125 PetriNetUnfolderBase]: For 2022022/2022022 co-relation queries the response was YES. [2024-06-21 21:13:27,896 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74065 conditions, 6802 events. 4244/6802 cut-off events. For 2022022/2022022 co-relation queries the response was YES. Maximal size of possible extension queue 471. Compared 43072 event pairs, 938 based on Foata normal form. 1/6790 useless extension candidates. Maximal degree in co-relation 73841. Up to 6519 conditions per place. [2024-06-21 21:13:27,927 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 594 selfloop transitions, 21 changer transitions 0/625 dead transitions. [2024-06-21 21:13:27,927 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 473 places, 625 transitions, 8446 flow [2024-06-21 21:13:27,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:13:27,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:13:27,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 147 transitions. [2024-06-21 21:13:27,928 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3888888888888889 [2024-06-21 21:13:27,928 INFO L175 Difference]: Start difference. First operand has 465 places, 611 transitions, 7116 flow. Second operand 9 states and 147 transitions. [2024-06-21 21:13:27,928 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 473 places, 625 transitions, 8446 flow [2024-06-21 21:13:39,446 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 466 places, 625 transitions, 8230 flow, removed 47 selfloop flow, removed 7 redundant places. [2024-06-21 21:13:39,452 INFO L231 Difference]: Finished difference. Result has 467 places, 614 transitions, 7026 flow [2024-06-21 21:13:39,452 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6900, PETRI_DIFFERENCE_MINUEND_PLACES=458, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=611, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=590, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7026, PETRI_PLACES=467, PETRI_TRANSITIONS=614} [2024-06-21 21:13:39,452 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 424 predicate places. [2024-06-21 21:13:39,452 INFO L495 AbstractCegarLoop]: Abstraction has has 467 places, 614 transitions, 7026 flow [2024-06-21 21:13:39,452 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:13:39,453 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:13:39,453 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:13:39,453 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable154 [2024-06-21 21:13:39,453 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)] === [2024-06-21 21:13:39,453 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:13:39,453 INFO L85 PathProgramCache]: Analyzing trace with hash -295350605, now seen corresponding path program 9 times [2024-06-21 21:13:39,453 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:13:39,453 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1172689473] [2024-06-21 21:13:39,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:13:39,453 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:13:39,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:13:40,279 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:13:40,279 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:13:40,279 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1172689473] [2024-06-21 21:13:40,279 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1172689473] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:13:40,279 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:13:40,279 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:13:40,280 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2016652068] [2024-06-21 21:13:40,280 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:13:40,280 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:13:40,280 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:13:40,280 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:13:40,280 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:13:40,364 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 21:13:40,364 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 467 places, 614 transitions, 7026 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:13:40,364 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:13:40,364 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 21:13:40,364 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:13:42,701 INFO L124 PetriNetUnfolderBase]: 4238/6794 cut-off events. [2024-06-21 21:13:42,701 INFO L125 PetriNetUnfolderBase]: For 2032214/2032214 co-relation queries the response was YES. [2024-06-21 21:13:42,917 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73461 conditions, 6794 events. 4238/6794 cut-off events. For 2032214/2032214 co-relation queries the response was YES. Maximal size of possible extension queue 471. Compared 43018 event pairs, 933 based on Foata normal form. 2/6783 useless extension candidates. Maximal degree in co-relation 73237. Up to 6471 conditions per place. [2024-06-21 21:13:42,955 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 582 selfloop transitions, 36 changer transitions 0/628 dead transitions. [2024-06-21 21:13:42,955 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 475 places, 628 transitions, 8302 flow [2024-06-21 21:13:42,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:13:42,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:13:42,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 153 transitions. [2024-06-21 21:13:42,956 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40476190476190477 [2024-06-21 21:13:42,956 INFO L175 Difference]: Start difference. First operand has 467 places, 614 transitions, 7026 flow. Second operand 9 states and 153 transitions. [2024-06-21 21:13:42,957 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 475 places, 628 transitions, 8302 flow [2024-06-21 21:13:52,094 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 468 places, 628 transitions, 8142 flow, removed 61 selfloop flow, removed 7 redundant places. [2024-06-21 21:13:52,104 INFO L231 Difference]: Finished difference. Result has 469 places, 614 transitions, 6944 flow [2024-06-21 21:13:52,105 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6866, PETRI_DIFFERENCE_MINUEND_PLACES=460, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=614, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=578, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6944, PETRI_PLACES=469, PETRI_TRANSITIONS=614} [2024-06-21 21:13:52,105 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 426 predicate places. [2024-06-21 21:13:52,105 INFO L495 AbstractCegarLoop]: Abstraction has has 469 places, 614 transitions, 6944 flow [2024-06-21 21:13:52,105 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:13:52,105 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:13:52,105 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:13:52,106 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable155 [2024-06-21 21:13:52,106 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)] === [2024-06-21 21:13:52,106 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:13:52,106 INFO L85 PathProgramCache]: Analyzing trace with hash -523251755, now seen corresponding path program 10 times [2024-06-21 21:13:52,106 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:13:52,106 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1175351200] [2024-06-21 21:13:52,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:13:52,107 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:13:52,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:13:53,016 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:13:53,017 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:13:53,017 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1175351200] [2024-06-21 21:13:53,017 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1175351200] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:13:53,017 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:13:53,017 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:13:53,017 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [38918430] [2024-06-21 21:13:53,017 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:13:53,017 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:13:53,018 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:13:53,018 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:13:53,018 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:13:53,123 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 21:13:53,123 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 469 places, 614 transitions, 6944 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:13:53,124 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:13:53,124 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 21:13:53,124 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:13:55,413 INFO L124 PetriNetUnfolderBase]: 4232/6786 cut-off events. [2024-06-21 21:13:55,413 INFO L125 PetriNetUnfolderBase]: For 2030694/2030694 co-relation queries the response was YES. [2024-06-21 21:13:55,499 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73116 conditions, 6786 events. 4232/6786 cut-off events. For 2030694/2030694 co-relation queries the response was YES. Maximal size of possible extension queue 471. Compared 42958 event pairs, 934 based on Foata normal form. 2/6775 useless extension candidates. Maximal degree in co-relation 72891. Up to 6422 conditions per place. [2024-06-21 21:13:55,527 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 564 selfloop transitions, 55 changer transitions 0/629 dead transitions. [2024-06-21 21:13:55,527 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 477 places, 629 transitions, 8226 flow [2024-06-21 21:13:55,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:13:55,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:13:55,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 159 transitions. [2024-06-21 21:13:55,528 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42063492063492064 [2024-06-21 21:13:55,528 INFO L175 Difference]: Start difference. First operand has 469 places, 614 transitions, 6944 flow. Second operand 9 states and 159 transitions. [2024-06-21 21:13:55,528 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 477 places, 629 transitions, 8226 flow [2024-06-21 21:14:05,850 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 469 places, 629 transitions, 8088 flow, removed 31 selfloop flow, removed 8 redundant places. [2024-06-21 21:14:05,856 INFO L231 Difference]: Finished difference. Result has 470 places, 614 transitions, 6922 flow [2024-06-21 21:14:05,856 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6806, PETRI_DIFFERENCE_MINUEND_PLACES=461, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=614, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=559, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6922, PETRI_PLACES=470, PETRI_TRANSITIONS=614} [2024-06-21 21:14:05,856 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 427 predicate places. [2024-06-21 21:14:05,857 INFO L495 AbstractCegarLoop]: Abstraction has has 470 places, 614 transitions, 6922 flow [2024-06-21 21:14:05,857 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:14:05,857 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:14:05,857 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:14:05,857 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable156 [2024-06-21 21:14:05,857 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)] === [2024-06-21 21:14:05,858 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:14:05,858 INFO L85 PathProgramCache]: Analyzing trace with hash -973170785, now seen corresponding path program 10 times [2024-06-21 21:14:05,858 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:14:05,858 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1247198342] [2024-06-21 21:14:05,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:14:05,858 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:14:05,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:14:06,852 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:14:06,852 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:14:06,852 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1247198342] [2024-06-21 21:14:06,852 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1247198342] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:14:06,852 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:14:06,852 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 21:14:06,853 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [217586789] [2024-06-21 21:14:06,853 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:14:06,853 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 21:14:06,853 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:14:06,853 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 21:14:06,853 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-21 21:14:06,986 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-21 21:14:06,986 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 470 places, 614 transitions, 6922 flow. Second operand has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:14:06,986 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:14:06,986 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-21 21:14:06,986 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:14:09,293 INFO L124 PetriNetUnfolderBase]: 4229/6782 cut-off events. [2024-06-21 21:14:09,294 INFO L125 PetriNetUnfolderBase]: For 2023223/2023223 co-relation queries the response was YES. [2024-06-21 21:14:09,383 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73007 conditions, 6782 events. 4229/6782 cut-off events. For 2023223/2023223 co-relation queries the response was YES. Maximal size of possible extension queue 471. Compared 42868 event pairs, 936 based on Foata normal form. 1/6770 useless extension candidates. Maximal degree in co-relation 72781. Up to 6484 conditions per place. [2024-06-21 21:14:09,411 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 582 selfloop transitions, 33 changer transitions 0/625 dead transitions. [2024-06-21 21:14:09,412 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 478 places, 625 transitions, 8180 flow [2024-06-21 21:14:09,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:14:09,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:14:09,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 151 transitions. [2024-06-21 21:14:09,413 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3994708994708995 [2024-06-21 21:14:09,413 INFO L175 Difference]: Start difference. First operand has 470 places, 614 transitions, 6922 flow. Second operand 9 states and 151 transitions. [2024-06-21 21:14:09,413 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 478 places, 625 transitions, 8180 flow [2024-06-21 21:14:19,944 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 469 places, 625 transitions, 7984 flow, removed 25 selfloop flow, removed 9 redundant places. [2024-06-21 21:14:19,950 INFO L231 Difference]: Finished difference. Result has 470 places, 614 transitions, 6798 flow [2024-06-21 21:14:19,950 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6726, PETRI_DIFFERENCE_MINUEND_PLACES=461, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=614, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=581, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6798, PETRI_PLACES=470, PETRI_TRANSITIONS=614} [2024-06-21 21:14:19,950 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 427 predicate places. [2024-06-21 21:14:19,950 INFO L495 AbstractCegarLoop]: Abstraction has has 470 places, 614 transitions, 6798 flow [2024-06-21 21:14:19,950 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.6) internal successors, (116), 10 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:14:19,950 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:14:19,950 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:14:19,950 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable157 [2024-06-21 21:14:19,950 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)] === [2024-06-21 21:14:19,951 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:14:19,951 INFO L85 PathProgramCache]: Analyzing trace with hash -736680899, now seen corresponding path program 1 times [2024-06-21 21:14:19,951 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:14:19,951 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [728216423] [2024-06-21 21:14:19,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:14:19,951 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:14:19,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:14:21,280 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:14:21,280 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:14:21,281 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [728216423] [2024-06-21 21:14:21,281 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [728216423] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:14:21,281 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:14:21,281 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 21:14:21,281 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [227331462] [2024-06-21 21:14:21,281 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:14:21,281 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 21:14:21,281 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:14:21,281 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 21:14:21,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2024-06-21 21:14:21,389 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-21 21:14:21,389 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 470 places, 614 transitions, 6798 flow. Second operand has 12 states, 12 states have (on average 10.416666666666666) internal successors, (125), 12 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) [2024-06-21 21:14:21,389 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:14:21,389 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-21 21:14:21,389 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:14:23,979 INFO L124 PetriNetUnfolderBase]: 4436/7008 cut-off events. [2024-06-21 21:14:23,979 INFO L125 PetriNetUnfolderBase]: For 2358139/2358139 co-relation queries the response was YES. [2024-06-21 21:14:24,071 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78147 conditions, 7008 events. 4436/7008 cut-off events. For 2358139/2358139 co-relation queries the response was YES. Maximal size of possible extension queue 470. Compared 43282 event pairs, 1005 based on Foata normal form. 2/7008 useless extension candidates. Maximal degree in co-relation 77920. Up to 6807 conditions per place. [2024-06-21 21:14:24,101 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 602 selfloop transitions, 22 changer transitions 0/628 dead transitions. [2024-06-21 21:14:24,101 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 478 places, 628 transitions, 8154 flow [2024-06-21 21:14:24,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 21:14:24,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 21:14:24,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 140 transitions. [2024-06-21 21:14:24,102 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37037037037037035 [2024-06-21 21:14:24,102 INFO L175 Difference]: Start difference. First operand has 470 places, 614 transitions, 6798 flow. Second operand 9 states and 140 transitions. [2024-06-21 21:14:24,102 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 478 places, 628 transitions, 8154 flow Killed by 15