./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/mix002.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/mix002.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/mix002.opt.i ./goblint.2024-06-19_11-23-25.files/mutex-meet-nonrel/mix002.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 20:30:22,119 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-21 20:30:22,194 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-21 20:30:22,197 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-21 20:30:22,198 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-21 20:30:22,223 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-21 20:30:22,224 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-21 20:30:22,224 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-21 20:30:22,225 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-21 20:30:22,228 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-21 20:30:22,228 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-21 20:30:22,229 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-21 20:30:22,229 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-21 20:30:22,230 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-21 20:30:22,231 INFO L153 SettingsManager]: * Use SBE=true [2024-06-21 20:30:22,231 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-21 20:30:22,231 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-21 20:30:22,231 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-21 20:30:22,231 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-21 20:30:22,231 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-21 20:30:22,232 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-21 20:30:22,232 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-21 20:30:22,232 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-21 20:30:22,232 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-21 20:30:22,233 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-21 20:30:22,233 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-21 20:30:22,233 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-21 20:30:22,233 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-21 20:30:22,234 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-21 20:30:22,234 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-21 20:30:22,235 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-21 20:30:22,235 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-21 20:30:22,235 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-21 20:30:22,235 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-21 20:30:22,235 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-21 20:30:22,235 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-21 20:30:22,236 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-21 20:30:22,236 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-21 20:30:22,236 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-21 20:30:22,236 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-21 20:30:22,236 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-21 20:30:22,236 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-21 20:30:22,237 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-21 20:30:22,237 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-21 20:30:22,426 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-21 20:30:22,447 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-21 20:30:22,449 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-21 20:30:22,450 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-21 20:30:22,450 INFO L274 PluginConnector]: CDTParser initialized [2024-06-21 20:30:22,451 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/mix002.opt.i [2024-06-21 20:30:23,445 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-21 20:30:23,637 INFO L384 CDTParser]: Found 1 translation units. [2024-06-21 20:30:23,638 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/mix002.opt.i [2024-06-21 20:30:23,649 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b903dc45d/fed8a468229e4a63bdc1871c25b77151/FLAGc1c6d1326 [2024-06-21 20:30:23,659 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b903dc45d/fed8a468229e4a63bdc1871c25b77151 [2024-06-21 20:30:23,661 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-21 20:30:23,672 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-21 20:30:23,672 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-06-19_11-23-25.files/mutex-meet-nonrel/mix002.opt.yml/witness.yml [2024-06-21 20:30:23,818 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-21 20:30:23,819 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-21 20:30:23,819 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-21 20:30:23,820 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-21 20:30:23,823 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-21 20:30:23,824 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.06 08:30:23" (1/2) ... [2024-06-21 20:30:23,825 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6996f00c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 08:30:23, skipping insertion in model container [2024-06-21 20:30:23,825 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.06 08:30:23" (1/2) ... [2024-06-21 20:30:23,827 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@ba273cc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 08:30:23, skipping insertion in model container [2024-06-21 20:30:23,827 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 08:30:23" (2/2) ... [2024-06-21 20:30:23,827 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6996f00c and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 08:30:23, skipping insertion in model container [2024-06-21 20:30:23,828 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 08:30:23" (2/2) ... [2024-06-21 20:30:23,828 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-21 20:30:23,903 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-21 20:30:23,905 INFO L97 edCorrectnessWitness]: Location invariant before [L861-L861] ((((((((((((((((((((((! multithreaded || (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)) && (! multithreaded || (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1))) && (! multithreaded || ((((((((((((((((((((((0 <= __unbuffered_cnt && z$flush_delayed == (_Bool)0) && z$r_buff0_thd0 == (_Bool)0) && z$r_buff0_thd1 == (_Bool)0) && z$r_buff0_thd2 == (_Bool)0) && z$r_buff1_thd0 == (_Bool)0) && z$r_buff1_thd1 == (_Bool)0) && z$r_buff1_thd2 == (_Bool)0) && z$read_delayed == (_Bool)0) && z$read_delayed_var == 0) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)) && (__unbuffered_p0_EBX == 0 || __unbuffered_p0_EBX == 1)) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)) && (__unbuffered_p1_EBX == 0 || __unbuffered_p1_EBX == 1)) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)) && (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1)) && (a == 0 || a == 1)) && (x == 0 || x == 1)) && (y == 0 || y == 1)) && (z == 0 || z == 1)) && (z$mem_tmp == 0 || z$mem_tmp == 1)) && (z$w_buff0 == 0 || z$w_buff0 == 1)) && (z$w_buff1 == 0 || z$w_buff1 == 1)))) && (! multithreaded || (y == 0 || y == 1))) && (! multithreaded || (a == 0 || a == 1))) && (! multithreaded || z$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || (z$w_buff1 == 0 || z$w_buff1 == 1))) && (! multithreaded || (__unbuffered_p1_EBX == 0 || __unbuffered_p1_EBX == 1))) && (! multithreaded || z$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1))) && (! multithreaded || z$read_delayed == (_Bool)0)) && (! multithreaded || z$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || (__unbuffered_p0_EBX == 0 || __unbuffered_p0_EBX == 1))) && (! multithreaded || (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1))) && (! multithreaded || z$read_delayed_var == 0)) && (! multithreaded || z$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || (z$w_buff0 == 0 || z$w_buff0 == 1))) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || (z$mem_tmp == 0 || z$mem_tmp == 1))) && (! multithreaded || z$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || (z == 0 || z == 1))) && (! multithreaded || z$r_buff1_thd0 == (_Bool)0) [2024-06-21 20:30:23,905 INFO L97 edCorrectnessWitness]: Location invariant before [L864-L864] ((((((((((((((((((((((! multithreaded || (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)) && (! multithreaded || (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1))) && (! multithreaded || ((((((((((((((((((((((0 <= __unbuffered_cnt && z$flush_delayed == (_Bool)0) && z$r_buff0_thd0 == (_Bool)0) && z$r_buff0_thd1 == (_Bool)0) && z$r_buff0_thd2 == (_Bool)0) && z$r_buff1_thd0 == (_Bool)0) && z$r_buff1_thd1 == (_Bool)0) && z$r_buff1_thd2 == (_Bool)0) && z$read_delayed == (_Bool)0) && z$read_delayed_var == 0) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)) && (__unbuffered_p0_EBX == 0 || __unbuffered_p0_EBX == 1)) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)) && (__unbuffered_p1_EBX == 0 || __unbuffered_p1_EBX == 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)) && (y == 0 || y == 1)) && (z == 0 || z == 1)) && (z$mem_tmp == 0 || z$mem_tmp == 1)) && (z$w_buff0 == 0 || z$w_buff0 == 1)) && (z$w_buff1 == 0 || z$w_buff1 == 1)))) && (! multithreaded || (y == 0 || y == 1))) && (! multithreaded || (a == 0 || a == 1))) && (! multithreaded || z$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || (z$w_buff1 == 0 || z$w_buff1 == 1))) && (! multithreaded || (__unbuffered_p1_EBX == 0 || __unbuffered_p1_EBX == 1))) && (! multithreaded || z$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1))) && (! multithreaded || z$read_delayed == (_Bool)0)) && (! multithreaded || z$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || (__unbuffered_p0_EBX == 0 || __unbuffered_p0_EBX == 1))) && (! multithreaded || (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1))) && (! multithreaded || z$read_delayed_var == 0)) && (! multithreaded || z$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || (z$w_buff0 == 0 || z$w_buff0 == 1))) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || (z$mem_tmp == 0 || z$mem_tmp == 1))) && (! multithreaded || z$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || (z == 0 || z == 1))) && (! multithreaded || z$r_buff1_thd0 == (_Bool)0) [2024-06-21 20:30:23,905 INFO L97 edCorrectnessWitness]: Location invariant before [L863-L863] ((((((((((((((((((((((! multithreaded || (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)) && (! multithreaded || (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1))) && (! multithreaded || ((((((((((((((((((((((0 <= __unbuffered_cnt && z$flush_delayed == (_Bool)0) && z$r_buff0_thd0 == (_Bool)0) && z$r_buff0_thd1 == (_Bool)0) && z$r_buff0_thd2 == (_Bool)0) && z$r_buff1_thd0 == (_Bool)0) && z$r_buff1_thd1 == (_Bool)0) && z$r_buff1_thd2 == (_Bool)0) && z$read_delayed == (_Bool)0) && z$read_delayed_var == 0) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)) && (__unbuffered_p0_EBX == 0 || __unbuffered_p0_EBX == 1)) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)) && (__unbuffered_p1_EBX == 0 || __unbuffered_p1_EBX == 1)) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)) && (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1)) && (a == 0 || a == 1)) && (x == 0 || x == 1)) && (y == 0 || y == 1)) && (z == 0 || z == 1)) && (z$mem_tmp == 0 || z$mem_tmp == 1)) && (z$w_buff0 == 0 || z$w_buff0 == 1)) && (z$w_buff1 == 0 || z$w_buff1 == 1)))) && (! multithreaded || (y == 0 || y == 1))) && (! multithreaded || (a == 0 || a == 1))) && (! multithreaded || z$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || (z$w_buff1 == 0 || z$w_buff1 == 1))) && (! multithreaded || (__unbuffered_p1_EBX == 0 || __unbuffered_p1_EBX == 1))) && (! multithreaded || z$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1))) && (! multithreaded || z$read_delayed == (_Bool)0)) && (! multithreaded || z$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || (__unbuffered_p0_EBX == 0 || __unbuffered_p0_EBX == 1))) && (! multithreaded || (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1))) && (! multithreaded || z$read_delayed_var == 0)) && (! multithreaded || z$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || (z$w_buff0 == 0 || z$w_buff0 == 1))) && (! multithreaded || (x == 0 || x == 1))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || (z$mem_tmp == 0 || z$mem_tmp == 1))) && (! multithreaded || z$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || (z == 0 || z == 1))) && (! multithreaded || z$r_buff1_thd0 == (_Bool)0) [2024-06-21 20:30:23,905 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-21 20:30:23,905 INFO L106 edCorrectnessWitness]: ghost_update [L859-L859] multithreaded = 1; [2024-06-21 20:30:23,939 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-21 20:30:24,208 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-21 20:30:24,216 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-21 20:30:24,314 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-21 20:30:24,398 INFO L206 MainTranslator]: Completed translation [2024-06-21 20:30:24,399 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 08:30:24 WrapperNode [2024-06-21 20:30:24,399 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-21 20:30:24,400 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-21 20:30:24,400 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-21 20:30:24,400 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-21 20:30:24,405 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 08:30:24" (1/1) ... [2024-06-21 20:30:24,417 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 08:30:24" (1/1) ... [2024-06-21 20:30:24,464 INFO L138 Inliner]: procedures = 175, calls = 51, calls flagged for inlining = 6, calls inlined = 7, statements flattened = 152 [2024-06-21 20:30:24,464 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-21 20:30:24,465 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-21 20:30:24,465 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-21 20:30:24,465 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-21 20:30:24,473 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 08:30:24" (1/1) ... [2024-06-21 20:30:24,473 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 08:30:24" (1/1) ... [2024-06-21 20:30:24,477 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 08:30:24" (1/1) ... [2024-06-21 20:30:24,498 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 20:30:24,503 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 08:30:24" (1/1) ... [2024-06-21 20:30:24,503 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 08:30:24" (1/1) ... [2024-06-21 20:30:24,511 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 08:30:24" (1/1) ... [2024-06-21 20:30:24,512 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 08:30:24" (1/1) ... [2024-06-21 20:30:24,514 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 08:30:24" (1/1) ... [2024-06-21 20:30:24,515 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 08:30:24" (1/1) ... [2024-06-21 20:30:24,540 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-21 20:30:24,541 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-21 20:30:24,541 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-21 20:30:24,541 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-21 20:30:24,542 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 08:30:24" (1/1) ... [2024-06-21 20:30:24,549 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-21 20:30:24,555 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-21 20:30:24,570 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 20:30:24,579 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 20:30:24,605 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-21 20:30:24,605 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-21 20:30:24,605 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-21 20:30:24,605 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-21 20:30:24,606 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-21 20:30:24,606 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-21 20:30:24,606 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-21 20:30:24,606 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-21 20:30:24,606 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-21 20:30:24,606 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-21 20:30:24,607 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-21 20:30:24,607 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-21 20:30:24,608 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 20:30:24,727 INFO L244 CfgBuilder]: Building ICFG [2024-06-21 20:30:24,729 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-21 20:30:25,013 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-21 20:30:25,013 INFO L293 CfgBuilder]: Performing block encoding [2024-06-21 20:30:25,163 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-21 20:30:25,163 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-21 20:30:25,164 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.06 08:30:25 BoogieIcfgContainer [2024-06-21 20:30:25,164 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-21 20:30:25,166 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-21 20:30:25,166 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-21 20:30:25,169 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-21 20:30:25,169 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.06 08:30:23" (1/4) ... [2024-06-21 20:30:25,171 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@519870dc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.06 08:30:25, skipping insertion in model container [2024-06-21 20:30:25,171 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 08:30:23" (2/4) ... [2024-06-21 20:30:25,171 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@519870dc and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 21.06 08:30:25, skipping insertion in model container [2024-06-21 20:30:25,171 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 08:30:24" (3/4) ... [2024-06-21 20:30:25,171 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@519870dc and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 21.06 08:30:25, skipping insertion in model container [2024-06-21 20:30:25,172 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.06 08:30:25" (4/4) ... [2024-06-21 20:30:25,173 INFO L112 eAbstractionObserver]: Analyzing ICFG mix002.opt.i [2024-06-21 20:30:25,186 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-21 20:30:25,186 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2024-06-21 20:30:25,186 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-21 20:30:25,231 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-21 20:30:25,288 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 54 places, 44 transitions, 100 flow [2024-06-21 20:30:25,322 INFO L124 PetriNetUnfolderBase]: 0/41 cut-off events. [2024-06-21 20:30:25,322 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-21 20:30:25,323 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51 conditions, 41 events. 0/41 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 81 event pairs, 0 based on Foata normal form. 0/38 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2024-06-21 20:30:25,323 INFO L82 GeneralOperation]: Start removeDead. Operand has 54 places, 44 transitions, 100 flow [2024-06-21 20:30:25,326 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 45 places, 35 transitions, 79 flow [2024-06-21 20:30:25,334 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-21 20:30:25,340 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;@70b314df, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-21 20:30:25,340 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2024-06-21 20:30:25,343 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-21 20:30:25,343 INFO L124 PetriNetUnfolderBase]: 0/5 cut-off events. [2024-06-21 20:30:25,343 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-21 20:30:25,343 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:30:25,344 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-06-21 20:30:25,344 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 20:30:25,348 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:30:25,348 INFO L85 PathProgramCache]: Analyzing trace with hash 406084588, now seen corresponding path program 1 times [2024-06-21 20:30:25,357 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:30:25,358 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1385748721] [2024-06-21 20:30:25,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:30:25,358 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:30:25,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:30:26,686 INFO 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 20:30:26,687 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:30:26,687 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1385748721] [2024-06-21 20:30:26,688 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1385748721] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:30:26,688 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:30:26,688 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-21 20:30:26,690 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1996263902] [2024-06-21 20:30:26,690 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:30:26,696 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-21 20:30:26,700 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:30:26,720 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-21 20:30:26,721 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-21 20:30:26,779 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 44 [2024-06-21 20:30:26,782 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 35 transitions, 79 flow. Second operand has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:30:26,783 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:30:26,783 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 44 [2024-06-21 20:30:26,784 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:30:27,083 INFO L124 PetriNetUnfolderBase]: 1116/1792 cut-off events. [2024-06-21 20:30:27,083 INFO L125 PetriNetUnfolderBase]: For 29/29 co-relation queries the response was YES. [2024-06-21 20:30:27,088 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3543 conditions, 1792 events. 1116/1792 cut-off events. For 29/29 co-relation queries the response was YES. Maximal size of possible extension queue 102. Compared 9553 event pairs, 765 based on Foata normal form. 1/1724 useless extension candidates. Maximal degree in co-relation 3531. Up to 1676 conditions per place. [2024-06-21 20:30:27,096 INFO L140 encePairwiseOnDemand]: 37/44 looper letters, 31 selfloop transitions, 4 changer transitions 0/45 dead transitions. [2024-06-21 20:30:27,096 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 45 transitions, 175 flow [2024-06-21 20:30:27,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-21 20:30:27,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-21 20:30:27,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 86 transitions. [2024-06-21 20:30:27,106 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6515151515151515 [2024-06-21 20:30:27,108 INFO L175 Difference]: Start difference. First operand has 45 places, 35 transitions, 79 flow. Second operand 3 states and 86 transitions. [2024-06-21 20:30:27,108 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 45 transitions, 175 flow [2024-06-21 20:30:27,110 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 45 transitions, 170 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-21 20:30:27,112 INFO L231 Difference]: Finished difference. Result has 45 places, 38 transitions, 106 flow [2024-06-21 20:30:27,113 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=76, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=106, PETRI_PLACES=45, PETRI_TRANSITIONS=38} [2024-06-21 20:30:27,115 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 0 predicate places. [2024-06-21 20:30:27,116 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 38 transitions, 106 flow [2024-06-21 20:30:27,116 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:30:27,116 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:30:27,116 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:30:27,116 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-21 20:30:27,117 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 20:30:27,117 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:30:27,117 INFO L85 PathProgramCache]: Analyzing trace with hash -594026213, now seen corresponding path program 1 times [2024-06-21 20:30:27,117 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:30:27,117 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1565463434] [2024-06-21 20:30:27,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:30:27,118 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:30:27,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:30:28,122 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:30:28,122 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:30:28,122 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1565463434] [2024-06-21 20:30:28,122 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1565463434] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:30:28,123 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:30:28,123 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-21 20:30:28,123 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1084938630] [2024-06-21 20:30:28,123 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:30:28,125 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-21 20:30:28,125 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:30:28,126 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-21 20:30:28,126 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-21 20:30:28,195 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 44 [2024-06-21 20:30:28,195 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 38 transitions, 106 flow. Second operand has 4 states, 4 states have (on average 16.25) internal successors, (65), 4 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:30:28,196 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:30:28,196 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 44 [2024-06-21 20:30:28,196 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:30:28,466 INFO L124 PetriNetUnfolderBase]: 1280/1988 cut-off events. [2024-06-21 20:30:28,466 INFO L125 PetriNetUnfolderBase]: For 406/406 co-relation queries the response was YES. [2024-06-21 20:30:28,469 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4509 conditions, 1988 events. 1280/1988 cut-off events. For 406/406 co-relation queries the response was YES. Maximal size of possible extension queue 111. Compared 10399 event pairs, 750 based on Foata normal form. 3/1970 useless extension candidates. Maximal degree in co-relation 4497. Up to 1897 conditions per place. [2024-06-21 20:30:28,476 INFO L140 encePairwiseOnDemand]: 36/44 looper letters, 39 selfloop transitions, 7 changer transitions 0/55 dead transitions. [2024-06-21 20:30:28,477 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 55 transitions, 244 flow [2024-06-21 20:30:28,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-21 20:30:28,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-21 20:30:28,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 109 transitions. [2024-06-21 20:30:28,479 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6193181818181818 [2024-06-21 20:30:28,479 INFO L175 Difference]: Start difference. First operand has 45 places, 38 transitions, 106 flow. Second operand 4 states and 109 transitions. [2024-06-21 20:30:28,479 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 55 transitions, 244 flow [2024-06-21 20:30:28,480 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 55 transitions, 240 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-21 20:30:28,480 INFO L231 Difference]: Finished difference. Result has 48 places, 41 transitions, 142 flow [2024-06-21 20:30:28,481 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=102, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=142, PETRI_PLACES=48, PETRI_TRANSITIONS=41} [2024-06-21 20:30:28,481 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 3 predicate places. [2024-06-21 20:30:28,481 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 41 transitions, 142 flow [2024-06-21 20:30:28,482 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.25) internal successors, (65), 4 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:30:28,482 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:30:28,482 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:30:28,482 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-21 20:30:28,482 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 20:30:28,483 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:30:28,483 INFO L85 PathProgramCache]: Analyzing trace with hash -1234942835, now seen corresponding path program 1 times [2024-06-21 20:30:28,483 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:30:28,483 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1717351988] [2024-06-21 20:30:28,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:30:28,483 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:30:28,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:30:29,728 INFO 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 20:30:29,728 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:30:29,728 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1717351988] [2024-06-21 20:30:29,728 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1717351988] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:30:29,729 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:30:29,729 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-21 20:30:29,729 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1773574174] [2024-06-21 20:30:29,729 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:30:29,730 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-21 20:30:29,730 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:30:29,730 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-21 20:30:29,731 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-21 20:30:29,800 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 44 [2024-06-21 20:30:29,800 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 41 transitions, 142 flow. Second operand has 5 states, 5 states have (on average 15.2) internal successors, (76), 5 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:30:29,800 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:30:29,800 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 44 [2024-06-21 20:30:29,801 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:30:30,155 INFO L124 PetriNetUnfolderBase]: 1558/2398 cut-off events. [2024-06-21 20:30:30,156 INFO L125 PetriNetUnfolderBase]: For 1327/1327 co-relation queries the response was YES. [2024-06-21 20:30:30,159 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6014 conditions, 2398 events. 1558/2398 cut-off events. For 1327/1327 co-relation queries the response was YES. Maximal size of possible extension queue 121. Compared 12426 event pairs, 839 based on Foata normal form. 3/2382 useless extension candidates. Maximal degree in co-relation 6000. Up to 2286 conditions per place. [2024-06-21 20:30:30,169 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 47 selfloop transitions, 10 changer transitions 0/65 dead transitions. [2024-06-21 20:30:30,170 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 65 transitions, 324 flow [2024-06-21 20:30:30,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 20:30:30,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 20:30:30,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 130 transitions. [2024-06-21 20:30:30,175 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5909090909090909 [2024-06-21 20:30:30,175 INFO L175 Difference]: Start difference. First operand has 48 places, 41 transitions, 142 flow. Second operand 5 states and 130 transitions. [2024-06-21 20:30:30,175 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 65 transitions, 324 flow [2024-06-21 20:30:30,177 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 65 transitions, 310 flow, removed 2 selfloop flow, removed 2 redundant places. [2024-06-21 20:30:30,179 INFO L231 Difference]: Finished difference. Result has 51 places, 44 transitions, 178 flow [2024-06-21 20:30:30,179 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=128, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=178, PETRI_PLACES=51, PETRI_TRANSITIONS=44} [2024-06-21 20:30:30,180 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 6 predicate places. [2024-06-21 20:30:30,180 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 44 transitions, 178 flow [2024-06-21 20:30:30,180 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.2) internal successors, (76), 5 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:30:30,180 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:30:30,181 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:30:30,181 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-21 20:30:30,181 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:30:30,181 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:30:30,181 INFO L85 PathProgramCache]: Analyzing trace with hash -293456726, now seen corresponding path program 1 times [2024-06-21 20:30:30,182 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:30:30,182 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [522130043] [2024-06-21 20:30:30,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:30:30,182 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:30:30,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:30:31,603 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 20:30:31,603 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:30:31,604 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [522130043] [2024-06-21 20:30:31,604 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [522130043] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:30:31,604 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:30:31,604 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 20:30:31,604 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [193633268] [2024-06-21 20:30:31,604 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:30:31,605 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 20:30:31,605 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:30:31,605 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 20:30:31,605 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-21 20:30:31,687 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 44 [2024-06-21 20:30:31,687 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 44 transitions, 178 flow. Second operand has 6 states, 6 states have (on average 15.166666666666666) internal successors, (91), 6 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:30:31,687 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:30:31,688 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 44 [2024-06-21 20:30:31,688 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:30:32,016 INFO L124 PetriNetUnfolderBase]: 1552/2407 cut-off events. [2024-06-21 20:30:32,016 INFO L125 PetriNetUnfolderBase]: For 2479/2479 co-relation queries the response was YES. [2024-06-21 20:30:32,020 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6593 conditions, 2407 events. 1552/2407 cut-off events. For 2479/2479 co-relation queries the response was YES. Maximal size of possible extension queue 123. Compared 12601 event pairs, 697 based on Foata normal form. 3/2404 useless extension candidates. Maximal degree in co-relation 6578. Up to 2262 conditions per place. [2024-06-21 20:30:32,028 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 54 selfloop transitions, 13 changer transitions 0/75 dead transitions. [2024-06-21 20:30:32,028 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 75 transitions, 402 flow [2024-06-21 20:30:32,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 20:30:32,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 20:30:32,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 154 transitions. [2024-06-21 20:30:32,030 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5833333333333334 [2024-06-21 20:30:32,030 INFO L175 Difference]: Start difference. First operand has 51 places, 44 transitions, 178 flow. Second operand 6 states and 154 transitions. [2024-06-21 20:30:32,030 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 75 transitions, 402 flow [2024-06-21 20:30:32,033 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 75 transitions, 378 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-06-21 20:30:32,034 INFO L231 Difference]: Finished difference. Result has 54 places, 47 transitions, 214 flow [2024-06-21 20:30:32,035 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=154, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=214, PETRI_PLACES=54, PETRI_TRANSITIONS=47} [2024-06-21 20:30:32,036 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 9 predicate places. [2024-06-21 20:30:32,036 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 47 transitions, 214 flow [2024-06-21 20:30:32,036 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.166666666666666) internal successors, (91), 6 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:30:32,036 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:30:32,036 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:30:32,036 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-21 20:30:32,037 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 20:30:32,037 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:30:32,037 INFO L85 PathProgramCache]: Analyzing trace with hash -568962572, now seen corresponding path program 1 times [2024-06-21 20:30:32,038 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:30:32,038 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [716468444] [2024-06-21 20:30:32,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:30:32,038 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:30:32,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:30:32,653 INFO 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 20:30:32,653 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:30:32,653 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [716468444] [2024-06-21 20:30:32,654 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [716468444] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:30:32,654 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:30:32,654 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 20:30:32,654 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1056751047] [2024-06-21 20:30:32,654 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:30:32,655 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 20:30:32,655 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:30:32,655 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 20:30:32,655 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-21 20:30:32,723 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-21 20:30:32,723 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 47 transitions, 214 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 20:30:32,723 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:30:32,723 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-21 20:30:32,723 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:30:33,215 INFO L124 PetriNetUnfolderBase]: 1836/2891 cut-off events. [2024-06-21 20:30:33,216 INFO L125 PetriNetUnfolderBase]: For 4376/4376 co-relation queries the response was YES. [2024-06-21 20:30:33,220 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8378 conditions, 2891 events. 1836/2891 cut-off events. For 4376/4376 co-relation queries the response was YES. Maximal size of possible extension queue 133. Compared 15166 event pairs, 950 based on Foata normal form. 2/2851 useless extension candidates. Maximal degree in co-relation 8361. Up to 2709 conditions per place. [2024-06-21 20:30:33,230 INFO L140 encePairwiseOnDemand]: 36/44 looper letters, 45 selfloop transitions, 8 changer transitions 0/61 dead transitions. [2024-06-21 20:30:33,230 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 61 transitions, 364 flow [2024-06-21 20:30:33,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 20:30:33,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 20:30:33,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 107 transitions. [2024-06-21 20:30:33,231 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4863636363636364 [2024-06-21 20:30:33,231 INFO L175 Difference]: Start difference. First operand has 54 places, 47 transitions, 214 flow. Second operand 5 states and 107 transitions. [2024-06-21 20:30:33,231 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 61 transitions, 364 flow [2024-06-21 20:30:33,233 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 61 transitions, 330 flow, removed 6 selfloop flow, removed 4 redundant places. [2024-06-21 20:30:33,233 INFO L231 Difference]: Finished difference. Result has 55 places, 50 transitions, 226 flow [2024-06-21 20:30:33,234 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=180, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=226, PETRI_PLACES=55, PETRI_TRANSITIONS=50} [2024-06-21 20:30:33,234 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 10 predicate places. [2024-06-21 20:30:33,234 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 50 transitions, 226 flow [2024-06-21 20:30:33,234 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 20:30:33,235 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:30:33,235 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:30:33,235 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-21 20:30:33,235 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 20:30:33,235 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:30:33,235 INFO L85 PathProgramCache]: Analyzing trace with hash -501762066, now seen corresponding path program 1 times [2024-06-21 20:30:33,236 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:30:33,236 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [547652217] [2024-06-21 20:30:33,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:30:33,236 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:30:33,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:30:33,928 INFO 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 20:30:33,928 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:30:33,928 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [547652217] [2024-06-21 20:30:33,928 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [547652217] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:30:33,928 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:30:33,928 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:30:33,928 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [54358458] [2024-06-21 20:30:33,929 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:30:33,929 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:30:33,929 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:30:33,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:30:33,929 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:30:34,031 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-21 20:30:34,031 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 50 transitions, 226 flow. Second operand has 7 states, 7 states have (on average 13.428571428571429) internal successors, (94), 7 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 20:30:34,031 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:30:34,032 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-21 20:30:34,032 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:30:34,557 INFO L124 PetriNetUnfolderBase]: 1819/2922 cut-off events. [2024-06-21 20:30:34,558 INFO L125 PetriNetUnfolderBase]: For 6017/6017 co-relation queries the response was YES. [2024-06-21 20:30:34,563 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8945 conditions, 2922 events. 1819/2922 cut-off events. For 6017/6017 co-relation queries the response was YES. Maximal size of possible extension queue 136. Compared 15586 event pairs, 914 based on Foata normal form. 4/2916 useless extension candidates. Maximal degree in co-relation 8926. Up to 2677 conditions per place. [2024-06-21 20:30:34,607 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 50 selfloop transitions, 11 changer transitions 0/69 dead transitions. [2024-06-21 20:30:34,607 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 69 transitions, 408 flow [2024-06-21 20:30:34,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 20:30:34,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 20:30:34,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 127 transitions. [2024-06-21 20:30:34,608 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4810606060606061 [2024-06-21 20:30:34,609 INFO L175 Difference]: Start difference. First operand has 55 places, 50 transitions, 226 flow. Second operand 6 states and 127 transitions. [2024-06-21 20:30:34,609 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 69 transitions, 408 flow [2024-06-21 20:30:34,611 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 69 transitions, 386 flow, removed 5 selfloop flow, removed 3 redundant places. [2024-06-21 20:30:34,611 INFO L231 Difference]: Finished difference. Result has 58 places, 53 transitions, 260 flow [2024-06-21 20:30:34,611 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=204, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=260, PETRI_PLACES=58, PETRI_TRANSITIONS=53} [2024-06-21 20:30:34,612 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 13 predicate places. [2024-06-21 20:30:34,612 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 53 transitions, 260 flow [2024-06-21 20:30:34,612 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.428571428571429) internal successors, (94), 7 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 20:30:34,612 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:30:34,612 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:30:34,612 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-21 20:30:34,613 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 20:30:34,613 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:30:34,613 INFO L85 PathProgramCache]: Analyzing trace with hash 2716375, now seen corresponding path program 1 times [2024-06-21 20:30:34,613 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:30:34,613 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1684136049] [2024-06-21 20:30:34,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:30:34,613 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:30:34,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:30:35,323 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:30:35,323 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:30:35,324 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1684136049] [2024-06-21 20:30:35,324 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1684136049] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:30:35,324 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:30:35,324 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:30:35,324 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [655300981] [2024-06-21 20:30:35,324 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:30:35,324 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:30:35,324 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:30:35,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:30:35,325 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:30:35,394 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-21 20:30:35,394 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 53 transitions, 260 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 20:30:35,394 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:30:35,394 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-21 20:30:35,394 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:30:36,046 INFO L124 PetriNetUnfolderBase]: 2110/3221 cut-off events. [2024-06-21 20:30:36,047 INFO L125 PetriNetUnfolderBase]: For 9465/9471 co-relation queries the response was YES. [2024-06-21 20:30:36,053 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10820 conditions, 3221 events. 2110/3221 cut-off events. For 9465/9471 co-relation queries the response was YES. Maximal size of possible extension queue 142. Compared 16347 event pairs, 1074 based on Foata normal form. 6/3224 useless extension candidates. Maximal degree in co-relation 10800. Up to 3081 conditions per place. [2024-06-21 20:30:36,070 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 56 selfloop transitions, 16 changer transitions 0/79 dead transitions. [2024-06-21 20:30:36,070 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 79 transitions, 522 flow [2024-06-21 20:30:36,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 20:30:36,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 20:30:36,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 128 transitions. [2024-06-21 20:30:36,072 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48484848484848486 [2024-06-21 20:30:36,072 INFO L175 Difference]: Start difference. First operand has 58 places, 53 transitions, 260 flow. Second operand 6 states and 128 transitions. [2024-06-21 20:30:36,072 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 79 transitions, 522 flow [2024-06-21 20:30:36,077 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 79 transitions, 490 flow, removed 7 selfloop flow, removed 4 redundant places. [2024-06-21 20:30:36,079 INFO L231 Difference]: Finished difference. Result has 60 places, 59 transitions, 318 flow [2024-06-21 20:30:36,079 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=228, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=318, PETRI_PLACES=60, PETRI_TRANSITIONS=59} [2024-06-21 20:30:36,080 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 15 predicate places. [2024-06-21 20:30:36,080 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 59 transitions, 318 flow [2024-06-21 20:30:36,080 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 20:30:36,080 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:30:36,081 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:30:36,081 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-21 20:30:36,081 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:30:36,081 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:30:36,081 INFO L85 PathProgramCache]: Analyzing trace with hash -1417243637, now seen corresponding path program 1 times [2024-06-21 20:30:36,081 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:30:36,082 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2069115062] [2024-06-21 20:30:36,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:30:36,082 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:30:36,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:30:37,961 INFO 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 20:30:37,961 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:30:37,961 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2069115062] [2024-06-21 20:30:37,961 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2069115062] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:30:37,962 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:30:37,962 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:30:37,962 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [708141281] [2024-06-21 20:30:37,962 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:30:37,962 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:30:37,962 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:30:37,963 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:30:37,963 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:30:38,060 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 44 [2024-06-21 20:30:38,060 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 59 transitions, 318 flow. Second operand has 8 states, 8 states have (on average 14.125) internal successors, (113), 8 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 20:30:38,061 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:30:38,061 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 44 [2024-06-21 20:30:38,061 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:30:38,507 INFO L124 PetriNetUnfolderBase]: 2092/3200 cut-off events. [2024-06-21 20:30:38,507 INFO L125 PetriNetUnfolderBase]: For 12578/12578 co-relation queries the response was YES. [2024-06-21 20:30:38,513 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11344 conditions, 3200 events. 2092/3200 cut-off events. For 12578/12578 co-relation queries the response was YES. Maximal size of possible extension queue 142. Compared 16314 event pairs, 688 based on Foata normal form. 6/3194 useless extension candidates. Maximal degree in co-relation 11324. Up to 2974 conditions per place. [2024-06-21 20:30:38,524 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 75 selfloop transitions, 18 changer transitions 0/103 dead transitions. [2024-06-21 20:30:38,524 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 103 transitions, 632 flow [2024-06-21 20:30:38,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:30:38,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:30:38,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 191 transitions. [2024-06-21 20:30:38,525 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5426136363636364 [2024-06-21 20:30:38,525 INFO L175 Difference]: Start difference. First operand has 60 places, 59 transitions, 318 flow. Second operand 8 states and 191 transitions. [2024-06-21 20:30:38,526 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 103 transitions, 632 flow [2024-06-21 20:30:38,532 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 103 transitions, 608 flow, removed 8 selfloop flow, removed 2 redundant places. [2024-06-21 20:30:38,533 INFO L231 Difference]: Finished difference. Result has 66 places, 63 transitions, 373 flow [2024-06-21 20:30:38,534 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=284, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=373, PETRI_PLACES=66, PETRI_TRANSITIONS=63} [2024-06-21 20:30:38,534 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 21 predicate places. [2024-06-21 20:30:38,534 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 63 transitions, 373 flow [2024-06-21 20:30:38,534 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.125) internal successors, (113), 8 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 20:30:38,534 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:30:38,535 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:30:38,535 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-21 20:30:38,535 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 20:30:38,535 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:30:38,535 INFO L85 PathProgramCache]: Analyzing trace with hash 1625236501, now seen corresponding path program 2 times [2024-06-21 20:30:38,535 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:30:38,535 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1804761838] [2024-06-21 20:30:38,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:30:38,536 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:30:38,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:30:39,231 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:30:39,232 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:30:39,232 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1804761838] [2024-06-21 20:30:39,232 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1804761838] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:30:39,232 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:30:39,232 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:30:39,232 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1862395752] [2024-06-21 20:30:39,232 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:30:39,233 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:30:39,233 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:30:39,233 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:30:39,233 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:30:39,294 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-21 20:30:39,294 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 63 transitions, 373 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 20:30:39,295 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:30:39,295 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-21 20:30:39,295 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:30:39,835 INFO L124 PetriNetUnfolderBase]: 2096/3204 cut-off events. [2024-06-21 20:30:39,835 INFO L125 PetriNetUnfolderBase]: For 15999/16014 co-relation queries the response was YES. [2024-06-21 20:30:39,841 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12174 conditions, 3204 events. 2096/3204 cut-off events. For 15999/16014 co-relation queries the response was YES. Maximal size of possible extension queue 142. Compared 16299 event pairs, 895 based on Foata normal form. 12/3212 useless extension candidates. Maximal degree in co-relation 12151. Up to 3061 conditions per place. [2024-06-21 20:30:39,853 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 55 selfloop transitions, 16 changer transitions 0/78 dead transitions. [2024-06-21 20:30:39,853 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 78 transitions, 553 flow [2024-06-21 20:30:39,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 20:30:39,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 20:30:39,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 122 transitions. [2024-06-21 20:30:39,854 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4621212121212121 [2024-06-21 20:30:39,854 INFO L175 Difference]: Start difference. First operand has 66 places, 63 transitions, 373 flow. Second operand 6 states and 122 transitions. [2024-06-21 20:30:39,854 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 78 transitions, 553 flow [2024-06-21 20:30:39,860 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 78 transitions, 488 flow, removed 17 selfloop flow, removed 5 redundant places. [2024-06-21 20:30:39,863 INFO L231 Difference]: Finished difference. Result has 67 places, 63 transitions, 348 flow [2024-06-21 20:30:39,863 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=308, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=348, PETRI_PLACES=67, PETRI_TRANSITIONS=63} [2024-06-21 20:30:39,864 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 22 predicate places. [2024-06-21 20:30:39,864 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 63 transitions, 348 flow [2024-06-21 20:30:39,864 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 20:30:39,864 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:30:39,865 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:30:39,865 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-21 20:30:39,865 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 20:30:39,865 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:30:39,865 INFO L85 PathProgramCache]: Analyzing trace with hash 955716885, now seen corresponding path program 1 times [2024-06-21 20:30:39,868 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:30:39,871 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [875178793] [2024-06-21 20:30:39,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:30:39,871 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:30:39,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:30:40,600 INFO 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 20:30:40,600 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:30:40,600 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [875178793] [2024-06-21 20:30:40,600 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [875178793] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:30:40,600 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:30:40,601 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:30:40,601 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [155662138] [2024-06-21 20:30:40,601 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:30:40,601 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:30:40,601 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:30:40,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:30:40,602 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:30:40,657 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-21 20:30:40,658 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 63 transitions, 348 flow. Second operand has 8 states, 8 states have (on average 11.375) internal successors, (91), 8 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:30:40,658 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:30:40,658 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-21 20:30:40,658 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:30:41,303 INFO L124 PetriNetUnfolderBase]: 2311/3475 cut-off events. [2024-06-21 20:30:41,304 INFO L125 PetriNetUnfolderBase]: For 19146/19156 co-relation queries the response was YES. [2024-06-21 20:30:41,310 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13417 conditions, 3475 events. 2311/3475 cut-off events. For 19146/19156 co-relation queries the response was YES. Maximal size of possible extension queue 142. Compared 17230 event pairs, 870 based on Foata normal form. 10/3482 useless extension candidates. Maximal degree in co-relation 13392. Up to 3259 conditions per place. [2024-06-21 20:30:41,323 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 78 selfloop transitions, 41 changer transitions 0/124 dead transitions. [2024-06-21 20:30:41,323 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 124 transitions, 995 flow [2024-06-21 20:30:41,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:30:41,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:30:41,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 166 transitions. [2024-06-21 20:30:41,325 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4715909090909091 [2024-06-21 20:30:41,325 INFO L175 Difference]: Start difference. First operand has 67 places, 63 transitions, 348 flow. Second operand 8 states and 166 transitions. [2024-06-21 20:30:41,325 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 124 transitions, 995 flow [2024-06-21 20:30:41,333 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 124 transitions, 930 flow, removed 4 selfloop flow, removed 5 redundant places. [2024-06-21 20:30:41,335 INFO L231 Difference]: Finished difference. Result has 73 places, 90 transitions, 638 flow [2024-06-21 20:30:41,335 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=308, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=638, PETRI_PLACES=73, PETRI_TRANSITIONS=90} [2024-06-21 20:30:41,337 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 28 predicate places. [2024-06-21 20:30:41,337 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 90 transitions, 638 flow [2024-06-21 20:30:41,337 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.375) internal successors, (91), 8 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:30:41,337 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:30:41,338 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:30:41,338 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-21 20:30:41,338 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:30:41,338 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:30:41,338 INFO L85 PathProgramCache]: Analyzing trace with hash 84029139, now seen corresponding path program 2 times [2024-06-21 20:30:41,338 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:30:41,339 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [267869957] [2024-06-21 20:30:41,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:30:41,339 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:30:41,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:30:42,181 INFO 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 20:30:42,182 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:30:42,182 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [267869957] [2024-06-21 20:30:42,182 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [267869957] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:30:42,182 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:30:42,182 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:30:42,182 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [392109800] [2024-06-21 20:30:42,182 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:30:42,183 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:30:42,183 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:30:42,183 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:30:42,183 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:30:42,259 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-21 20:30:42,259 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 90 transitions, 638 flow. Second operand has 8 states, 8 states have (on average 11.375) internal successors, (91), 8 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:30:42,259 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:30:42,259 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-21 20:30:42,259 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:30:42,943 INFO L124 PetriNetUnfolderBase]: 2327/3497 cut-off events. [2024-06-21 20:30:42,943 INFO L125 PetriNetUnfolderBase]: For 23681/23695 co-relation queries the response was YES. [2024-06-21 20:30:42,951 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14528 conditions, 3497 events. 2327/3497 cut-off events. For 23681/23695 co-relation queries the response was YES. Maximal size of possible extension queue 142. Compared 17345 event pairs, 875 based on Foata normal form. 16/3510 useless extension candidates. Maximal degree in co-relation 14499. Up to 3277 conditions per place. [2024-06-21 20:30:42,965 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 70 selfloop transitions, 49 changer transitions 0/124 dead transitions. [2024-06-21 20:30:42,966 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 124 transitions, 1082 flow [2024-06-21 20:30:42,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:30:42,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:30:42,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 143 transitions. [2024-06-21 20:30:42,967 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4642857142857143 [2024-06-21 20:30:42,967 INFO L175 Difference]: Start difference. First operand has 73 places, 90 transitions, 638 flow. Second operand 7 states and 143 transitions. [2024-06-21 20:30:42,967 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 124 transitions, 1082 flow [2024-06-21 20:30:42,982 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 124 transitions, 1048 flow, removed 13 selfloop flow, removed 2 redundant places. [2024-06-21 20:30:42,984 INFO L231 Difference]: Finished difference. Result has 78 places, 96 transitions, 791 flow [2024-06-21 20:30:42,984 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=604, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=90, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=791, PETRI_PLACES=78, PETRI_TRANSITIONS=96} [2024-06-21 20:30:42,985 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 33 predicate places. [2024-06-21 20:30:42,985 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 96 transitions, 791 flow [2024-06-21 20:30:42,985 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.375) internal successors, (91), 8 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:30:42,985 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:30:42,985 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:30:42,985 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-21 20:30:42,985 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 20:30:42,986 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:30:42,986 INFO L85 PathProgramCache]: Analyzing trace with hash -1393450129, now seen corresponding path program 1 times [2024-06-21 20:30:42,986 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:30:42,986 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1566468217] [2024-06-21 20:30:42,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:30:42,986 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:30:42,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:30:43,744 INFO 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 20:30:43,745 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:30:43,745 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1566468217] [2024-06-21 20:30:43,745 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1566468217] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:30:43,745 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:30:43,745 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:30:43,745 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [786692230] [2024-06-21 20:30:43,745 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:30:43,745 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:30:43,745 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:30:43,745 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:30:43,746 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:30:43,852 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-21 20:30:43,853 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 96 transitions, 791 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 20:30:43,853 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:30:43,853 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-21 20:30:43,853 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:30:44,519 INFO L124 PetriNetUnfolderBase]: 2230/3415 cut-off events. [2024-06-21 20:30:44,519 INFO L125 PetriNetUnfolderBase]: For 27008/27022 co-relation queries the response was YES. [2024-06-21 20:30:44,527 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14614 conditions, 3415 events. 2230/3415 cut-off events. For 27008/27022 co-relation queries the response was YES. Maximal size of possible extension queue 142. Compared 17447 event pairs, 825 based on Foata normal form. 13/3425 useless extension candidates. Maximal degree in co-relation 14583. Up to 3128 conditions per place. [2024-06-21 20:30:44,540 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 86 selfloop transitions, 30 changer transitions 0/131 dead transitions. [2024-06-21 20:30:44,540 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 131 transitions, 1219 flow [2024-06-21 20:30:44,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:30:44,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:30:44,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 150 transitions. [2024-06-21 20:30:44,570 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.487012987012987 [2024-06-21 20:30:44,570 INFO L175 Difference]: Start difference. First operand has 78 places, 96 transitions, 791 flow. Second operand 7 states and 150 transitions. [2024-06-21 20:30:44,571 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 131 transitions, 1219 flow [2024-06-21 20:30:44,586 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 131 transitions, 1091 flow, removed 30 selfloop flow, removed 5 redundant places. [2024-06-21 20:30:44,587 INFO L231 Difference]: Finished difference. Result has 80 places, 102 transitions, 802 flow [2024-06-21 20:30:44,588 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=667, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=96, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=802, PETRI_PLACES=80, PETRI_TRANSITIONS=102} [2024-06-21 20:30:44,589 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 35 predicate places. [2024-06-21 20:30:44,589 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 102 transitions, 802 flow [2024-06-21 20:30:44,590 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 20:30:44,590 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:30:44,590 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:30:44,590 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-21 20:30:44,591 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 20:30:44,591 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:30:44,591 INFO L85 PathProgramCache]: Analyzing trace with hash -1393450377, now seen corresponding path program 3 times [2024-06-21 20:30:44,591 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:30:44,591 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1425366470] [2024-06-21 20:30:44,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:30:44,592 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:30:44,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:30:45,373 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 20:30:45,374 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:30:45,374 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1425366470] [2024-06-21 20:30:45,374 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1425366470] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:30:45,374 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:30:45,374 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:30:45,374 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [493894642] [2024-06-21 20:30:45,374 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:30:45,374 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:30:45,374 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:30:45,375 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:30:45,375 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:30:45,462 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-21 20:30:45,463 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 102 transitions, 802 flow. Second operand has 8 states, 8 states have (on average 11.375) internal successors, (91), 8 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:30:45,463 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:30:45,463 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-21 20:30:45,463 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:30:46,214 INFO L124 PetriNetUnfolderBase]: 2372/3568 cut-off events. [2024-06-21 20:30:46,214 INFO L125 PetriNetUnfolderBase]: For 28646/28649 co-relation queries the response was YES. [2024-06-21 20:30:46,222 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15644 conditions, 3568 events. 2372/3568 cut-off events. For 28646/28649 co-relation queries the response was YES. Maximal size of possible extension queue 142. Compared 17704 event pairs, 855 based on Foata normal form. 7/3572 useless extension candidates. Maximal degree in co-relation 15613. Up to 3335 conditions per place. [2024-06-21 20:30:46,233 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 76 selfloop transitions, 55 changer transitions 0/136 dead transitions. [2024-06-21 20:30:46,234 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 136 transitions, 1296 flow [2024-06-21 20:30:46,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:30:46,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:30:46,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 141 transitions. [2024-06-21 20:30:46,235 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4577922077922078 [2024-06-21 20:30:46,235 INFO L175 Difference]: Start difference. First operand has 80 places, 102 transitions, 802 flow. Second operand 7 states and 141 transitions. [2024-06-21 20:30:46,235 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 136 transitions, 1296 flow [2024-06-21 20:30:46,252 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 136 transitions, 1255 flow, removed 12 selfloop flow, removed 3 redundant places. [2024-06-21 20:30:46,254 INFO L231 Difference]: Finished difference. Result has 84 places, 111 transitions, 994 flow [2024-06-21 20:30:46,254 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=761, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=102, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=994, PETRI_PLACES=84, PETRI_TRANSITIONS=111} [2024-06-21 20:30:46,255 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 39 predicate places. [2024-06-21 20:30:46,255 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 111 transitions, 994 flow [2024-06-21 20:30:46,255 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.375) internal successors, (91), 8 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:30:46,255 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:30:46,255 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:30:46,255 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-21 20:30:46,256 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 20:30:46,256 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:30:46,256 INFO L85 PathProgramCache]: Analyzing trace with hash -636814507, now seen corresponding path program 4 times [2024-06-21 20:30:46,256 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:30:46,256 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1833426582] [2024-06-21 20:30:46,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:30:46,256 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:30:46,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:30:46,998 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:30:46,998 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:30:46,998 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1833426582] [2024-06-21 20:30:46,998 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1833426582] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:30:46,998 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:30:46,998 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:30:46,998 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2074934132] [2024-06-21 20:30:46,998 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:30:46,999 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:30:46,999 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:30:46,999 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:30:46,999 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:30:47,073 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-21 20:30:47,073 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 111 transitions, 994 flow. Second operand has 8 states, 8 states have (on average 11.375) internal successors, (91), 8 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:30:47,073 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:30:47,073 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-21 20:30:47,073 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:30:47,756 INFO L124 PetriNetUnfolderBase]: 2361/3556 cut-off events. [2024-06-21 20:30:47,757 INFO L125 PetriNetUnfolderBase]: For 32451/32466 co-relation queries the response was YES. [2024-06-21 20:30:47,765 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16006 conditions, 3556 events. 2361/3556 cut-off events. For 32451/32466 co-relation queries the response was YES. Maximal size of possible extension queue 142. Compared 17657 event pairs, 859 based on Foata normal form. 14/3559 useless extension candidates. Maximal degree in co-relation 15973. Up to 3324 conditions per place. [2024-06-21 20:30:47,775 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 71 selfloop transitions, 55 changer transitions 0/131 dead transitions. [2024-06-21 20:30:47,776 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 131 transitions, 1314 flow [2024-06-21 20:30:47,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:30:47,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:30:47,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 136 transitions. [2024-06-21 20:30:47,777 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44155844155844154 [2024-06-21 20:30:47,777 INFO L175 Difference]: Start difference. First operand has 84 places, 111 transitions, 994 flow. Second operand 7 states and 136 transitions. [2024-06-21 20:30:47,777 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 131 transitions, 1314 flow [2024-06-21 20:30:47,798 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 131 transitions, 1145 flow, removed 48 selfloop flow, removed 4 redundant places. [2024-06-21 20:30:47,800 INFO L231 Difference]: Finished difference. Result has 87 places, 111 transitions, 950 flow [2024-06-21 20:30:47,800 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=825, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=111, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=950, PETRI_PLACES=87, PETRI_TRANSITIONS=111} [2024-06-21 20:30:47,800 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 42 predicate places. [2024-06-21 20:30:47,800 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 111 transitions, 950 flow [2024-06-21 20:30:47,801 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.375) internal successors, (91), 8 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:30:47,801 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:30:47,801 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:30:47,801 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-21 20:30:47,801 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 20:30:47,801 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:30:47,801 INFO L85 PathProgramCache]: Analyzing trace with hash -1157274769, now seen corresponding path program 2 times [2024-06-21 20:30:47,802 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:30:47,802 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1703218756] [2024-06-21 20:30:47,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:30:47,802 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:30:47,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:30:48,533 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 20:30:48,533 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:30:48,533 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1703218756] [2024-06-21 20:30:48,533 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1703218756] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:30:48,533 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:30:48,533 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:30:48,533 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [843570399] [2024-06-21 20:30:48,533 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:30:48,534 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:30:48,534 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:30:48,534 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:30:48,534 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:30:48,593 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-21 20:30:48,594 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 111 transitions, 950 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 20:30:48,594 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:30:48,594 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-21 20:30:48,594 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:30:49,277 INFO L124 PetriNetUnfolderBase]: 2261/3465 cut-off events. [2024-06-21 20:30:49,277 INFO L125 PetriNetUnfolderBase]: For 35741/35756 co-relation queries the response was YES. [2024-06-21 20:30:49,284 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15805 conditions, 3465 events. 2261/3465 cut-off events. For 35741/35756 co-relation queries the response was YES. Maximal size of possible extension queue 142. Compared 17663 event pairs, 816 based on Foata normal form. 14/3473 useless extension candidates. Maximal degree in co-relation 15771. Up to 3159 conditions per place. [2024-06-21 20:30:49,294 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 91 selfloop transitions, 33 changer transitions 0/142 dead transitions. [2024-06-21 20:30:49,294 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 142 transitions, 1378 flow [2024-06-21 20:30:49,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:30:49,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:30:49,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 147 transitions. [2024-06-21 20:30:49,295 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4772727272727273 [2024-06-21 20:30:49,296 INFO L175 Difference]: Start difference. First operand has 87 places, 111 transitions, 950 flow. Second operand 7 states and 147 transitions. [2024-06-21 20:30:49,296 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 142 transitions, 1378 flow [2024-06-21 20:30:49,315 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 142 transitions, 1209 flow, removed 6 selfloop flow, removed 7 redundant places. [2024-06-21 20:30:49,317 INFO L231 Difference]: Finished difference. Result has 87 places, 114 transitions, 892 flow [2024-06-21 20:30:49,318 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=781, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=111, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=892, PETRI_PLACES=87, PETRI_TRANSITIONS=114} [2024-06-21 20:30:49,318 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 42 predicate places. [2024-06-21 20:30:49,318 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 114 transitions, 892 flow [2024-06-21 20:30:49,318 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 20:30:49,318 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:30:49,319 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:30:49,319 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-21 20:30:49,319 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:30:49,319 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:30:49,319 INFO L85 PathProgramCache]: Analyzing trace with hash -1156978099, now seen corresponding path program 3 times [2024-06-21 20:30:49,319 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:30:49,319 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2069633396] [2024-06-21 20:30:49,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:30:49,320 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:30:49,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:30:50,058 INFO 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 20:30:50,060 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:30:50,060 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2069633396] [2024-06-21 20:30:50,062 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2069633396] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:30:50,062 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:30:50,062 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:30:50,062 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [615709612] [2024-06-21 20:30:50,062 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:30:50,062 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:30:50,063 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:30:50,063 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:30:50,063 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:30:50,190 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-21 20:30:50,190 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 114 transitions, 892 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 20:30:50,190 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:30:50,190 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-21 20:30:50,190 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:30:50,897 INFO L124 PetriNetUnfolderBase]: 2253/3452 cut-off events. [2024-06-21 20:30:50,897 INFO L125 PetriNetUnfolderBase]: For 39129/39144 co-relation queries the response was YES. [2024-06-21 20:30:50,903 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15935 conditions, 3452 events. 2253/3452 cut-off events. For 39129/39144 co-relation queries the response was YES. Maximal size of possible extension queue 142. Compared 17590 event pairs, 816 based on Foata normal form. 14/3460 useless extension candidates. Maximal degree in co-relation 15900. Up to 3151 conditions per place. [2024-06-21 20:30:50,912 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 85 selfloop transitions, 35 changer transitions 0/138 dead transitions. [2024-06-21 20:30:50,912 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 138 transitions, 1212 flow [2024-06-21 20:30:50,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:30:50,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:30:50,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 143 transitions. [2024-06-21 20:30:50,914 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4642857142857143 [2024-06-21 20:30:50,914 INFO L175 Difference]: Start difference. First operand has 87 places, 114 transitions, 892 flow. Second operand 7 states and 143 transitions. [2024-06-21 20:30:50,914 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 138 transitions, 1212 flow [2024-06-21 20:30:50,937 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 138 transitions, 1102 flow, removed 21 selfloop flow, removed 5 redundant places. [2024-06-21 20:30:50,938 INFO L231 Difference]: Finished difference. Result has 89 places, 114 transitions, 860 flow [2024-06-21 20:30:50,938 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=782, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=114, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=860, PETRI_PLACES=89, PETRI_TRANSITIONS=114} [2024-06-21 20:30:50,939 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 44 predicate places. [2024-06-21 20:30:50,939 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 114 transitions, 860 flow [2024-06-21 20:30:50,939 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 20:30:50,939 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:30:50,939 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:30:50,939 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-21 20:30:50,939 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:30:50,940 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:30:50,940 INFO L85 PathProgramCache]: Analyzing trace with hash -1858660447, now seen corresponding path program 1 times [2024-06-21 20:30:50,940 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:30:50,940 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1349791333] [2024-06-21 20:30:50,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:30:50,940 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:30:50,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:30:51,808 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 20:30:51,808 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:30:51,808 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1349791333] [2024-06-21 20:30:51,808 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1349791333] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:30:51,808 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:30:51,808 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:30:51,808 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1039086783] [2024-06-21 20:30:51,809 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:30:51,809 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:30:51,809 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:30:51,809 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:30:51,809 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:30:51,883 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 44 [2024-06-21 20:30:51,884 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 114 transitions, 860 flow. Second operand has 7 states, 7 states have (on average 15.714285714285714) internal successors, (110), 7 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:30:51,884 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:30:51,884 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 44 [2024-06-21 20:30:51,884 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:30:52,334 INFO L124 PetriNetUnfolderBase]: 1731/2905 cut-off events. [2024-06-21 20:30:52,335 INFO L125 PetriNetUnfolderBase]: For 37099/37099 co-relation queries the response was YES. [2024-06-21 20:30:52,343 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13525 conditions, 2905 events. 1731/2905 cut-off events. For 37099/37099 co-relation queries the response was YES. Maximal size of possible extension queue 134. Compared 16437 event pairs, 685 based on Foata normal form. 1/2896 useless extension candidates. Maximal degree in co-relation 13489. Up to 2524 conditions per place. [2024-06-21 20:30:52,351 INFO L140 encePairwiseOnDemand]: 37/44 looper letters, 81 selfloop transitions, 8 changer transitions 0/125 dead transitions. [2024-06-21 20:30:52,351 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 125 transitions, 1084 flow [2024-06-21 20:30:52,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 20:30:52,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 20:30:52,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 110 transitions. [2024-06-21 20:30:52,365 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-06-21 20:30:52,365 INFO L175 Difference]: Start difference. First operand has 89 places, 114 transitions, 860 flow. Second operand 5 states and 110 transitions. [2024-06-21 20:30:52,365 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 125 transitions, 1084 flow [2024-06-21 20:30:52,385 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 125 transitions, 1001 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-06-21 20:30:52,387 INFO L231 Difference]: Finished difference. Result has 88 places, 117 transitions, 827 flow [2024-06-21 20:30:52,387 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=777, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=114, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=106, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=827, PETRI_PLACES=88, PETRI_TRANSITIONS=117} [2024-06-21 20:30:52,387 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 43 predicate places. [2024-06-21 20:30:52,387 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 117 transitions, 827 flow [2024-06-21 20:30:52,388 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.714285714285714) internal successors, (110), 7 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:30:52,388 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:30:52,388 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:30:52,388 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-21 20:30:52,388 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 20:30:52,388 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:30:52,388 INFO L85 PathProgramCache]: Analyzing trace with hash -1690212682, now seen corresponding path program 1 times [2024-06-21 20:30:52,388 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:30:52,388 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [450546978] [2024-06-21 20:30:52,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:30:52,389 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:30:52,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:30:53,274 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:30:53,274 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:30:53,274 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [450546978] [2024-06-21 20:30:53,274 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [450546978] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:30:53,274 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:30:53,274 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:30:53,274 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1953122371] [2024-06-21 20:30:53,275 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:30:53,275 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:30:53,275 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:30:53,275 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:30:53,275 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:30:53,356 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-21 20:30:53,357 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 117 transitions, 827 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 20:30:53,357 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:30:53,357 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-21 20:30:53,357 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:30:54,173 INFO L124 PetriNetUnfolderBase]: 2381/3585 cut-off events. [2024-06-21 20:30:54,173 INFO L125 PetriNetUnfolderBase]: For 47069/47076 co-relation queries the response was YES. [2024-06-21 20:30:54,182 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17270 conditions, 3585 events. 2381/3585 cut-off events. For 47069/47076 co-relation queries the response was YES. Maximal size of possible extension queue 143. Compared 17858 event pairs, 838 based on Foata normal form. 8/3590 useless extension candidates. Maximal degree in co-relation 17233. Up to 3273 conditions per place. [2024-06-21 20:30:54,193 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 87 selfloop transitions, 65 changer transitions 0/157 dead transitions. [2024-06-21 20:30:54,193 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 157 transitions, 1369 flow [2024-06-21 20:30:54,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:30:54,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:30:54,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 164 transitions. [2024-06-21 20:30:54,194 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4659090909090909 [2024-06-21 20:30:54,194 INFO L175 Difference]: Start difference. First operand has 88 places, 117 transitions, 827 flow. Second operand 8 states and 164 transitions. [2024-06-21 20:30:54,194 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 157 transitions, 1369 flow [2024-06-21 20:30:54,217 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 157 transitions, 1341 flow, removed 8 selfloop flow, removed 3 redundant places. [2024-06-21 20:30:54,219 INFO L231 Difference]: Finished difference. Result has 93 places, 123 transitions, 1011 flow [2024-06-21 20:30:54,219 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=799, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=117, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1011, PETRI_PLACES=93, PETRI_TRANSITIONS=123} [2024-06-21 20:30:54,219 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 48 predicate places. [2024-06-21 20:30:54,220 INFO L495 AbstractCegarLoop]: Abstraction has has 93 places, 123 transitions, 1011 flow [2024-06-21 20:30:54,220 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 20:30:54,220 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:30:54,220 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:30:54,220 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-21 20:30:54,220 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 20:30:54,220 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:30:54,221 INFO L85 PathProgramCache]: Analyzing trace with hash -252851665, now seen corresponding path program 1 times [2024-06-21 20:30:54,221 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:30:54,221 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1885697929] [2024-06-21 20:30:54,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:30:54,221 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:30:54,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:30:55,034 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:30:55,035 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:30:55,035 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1885697929] [2024-06-21 20:30:55,035 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1885697929] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:30:55,035 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:30:55,035 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:30:55,035 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1395674613] [2024-06-21 20:30:55,035 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:30:55,035 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:30:55,035 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:30:55,036 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:30:55,036 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:30:55,124 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-21 20:30:55,124 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 123 transitions, 1011 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 20:30:55,124 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:30:55,124 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-21 20:30:55,124 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:30:55,892 INFO L124 PetriNetUnfolderBase]: 2403/3611 cut-off events. [2024-06-21 20:30:55,893 INFO L125 PetriNetUnfolderBase]: For 54047/54054 co-relation queries the response was YES. [2024-06-21 20:30:55,902 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18307 conditions, 3611 events. 2403/3611 cut-off events. For 54047/54054 co-relation queries the response was YES. Maximal size of possible extension queue 143. Compared 17933 event pairs, 759 based on Foata normal form. 8/3616 useless extension candidates. Maximal degree in co-relation 18269. Up to 3200 conditions per place. [2024-06-21 20:30:55,917 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 95 selfloop transitions, 65 changer transitions 0/165 dead transitions. [2024-06-21 20:30:55,917 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 165 transitions, 1581 flow [2024-06-21 20:30:55,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:30:55,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:30:55,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 167 transitions. [2024-06-21 20:30:55,918 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4744318181818182 [2024-06-21 20:30:55,918 INFO L175 Difference]: Start difference. First operand has 93 places, 123 transitions, 1011 flow. Second operand 8 states and 167 transitions. [2024-06-21 20:30:55,918 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 165 transitions, 1581 flow [2024-06-21 20:30:55,958 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 165 transitions, 1476 flow, removed 20 selfloop flow, removed 4 redundant places. [2024-06-21 20:30:55,960 INFO L231 Difference]: Finished difference. Result has 97 places, 129 transitions, 1124 flow [2024-06-21 20:30:55,960 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=906, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=123, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1124, PETRI_PLACES=97, PETRI_TRANSITIONS=129} [2024-06-21 20:30:55,961 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 52 predicate places. [2024-06-21 20:30:55,961 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 129 transitions, 1124 flow [2024-06-21 20:30:55,961 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 20:30:55,961 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:30:55,961 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:30:55,961 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-21 20:30:55,961 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 20:30:55,961 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:30:55,961 INFO L85 PathProgramCache]: Analyzing trace with hash -252851882, now seen corresponding path program 2 times [2024-06-21 20:30:55,962 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:30:55,962 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1780400803] [2024-06-21 20:30:55,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:30:55,962 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:30:55,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:30:56,804 INFO 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 20:30:56,804 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:30:56,804 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1780400803] [2024-06-21 20:30:56,804 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1780400803] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:30:56,804 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:30:56,804 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:30:56,804 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1670856041] [2024-06-21 20:30:56,804 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:30:56,804 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:30:56,805 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:30:56,805 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:30:56,806 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:30:56,898 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-21 20:30:56,898 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 129 transitions, 1124 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 20:30:56,898 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:30:56,898 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-21 20:30:56,898 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:30:57,619 INFO L124 PetriNetUnfolderBase]: 2414/3637 cut-off events. [2024-06-21 20:30:57,620 INFO L125 PetriNetUnfolderBase]: For 60333/60340 co-relation queries the response was YES. [2024-06-21 20:30:57,630 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19119 conditions, 3637 events. 2414/3637 cut-off events. For 60333/60340 co-relation queries the response was YES. Maximal size of possible extension queue 143. Compared 18116 event pairs, 812 based on Foata normal form. 8/3642 useless extension candidates. Maximal degree in co-relation 19079. Up to 3317 conditions per place. [2024-06-21 20:30:57,643 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 99 selfloop transitions, 61 changer transitions 0/165 dead transitions. [2024-06-21 20:30:57,643 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 165 transitions, 1652 flow [2024-06-21 20:30:57,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:30:57,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:30:57,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 162 transitions. [2024-06-21 20:30:57,644 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4602272727272727 [2024-06-21 20:30:57,644 INFO L175 Difference]: Start difference. First operand has 97 places, 129 transitions, 1124 flow. Second operand 8 states and 162 transitions. [2024-06-21 20:30:57,645 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 165 transitions, 1652 flow [2024-06-21 20:30:57,676 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 165 transitions, 1571 flow, removed 18 selfloop flow, removed 4 redundant places. [2024-06-21 20:30:57,678 INFO L231 Difference]: Finished difference. Result has 101 places, 132 transitions, 1205 flow [2024-06-21 20:30:57,678 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1043, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=129, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1205, PETRI_PLACES=101, PETRI_TRANSITIONS=132} [2024-06-21 20:30:57,678 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 56 predicate places. [2024-06-21 20:30:57,678 INFO L495 AbstractCegarLoop]: Abstraction has has 101 places, 132 transitions, 1205 flow [2024-06-21 20:30:57,679 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 20:30:57,679 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:30:57,679 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:30:57,679 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-21 20:30:57,679 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 20:30:57,679 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:30:57,679 INFO L85 PathProgramCache]: Analyzing trace with hash -247287475, now seen corresponding path program 2 times [2024-06-21 20:30:57,680 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:30:57,680 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [752006078] [2024-06-21 20:30:57,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:30:57,680 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:30:57,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:30:58,539 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:30:58,540 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:30:58,540 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [752006078] [2024-06-21 20:30:58,540 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [752006078] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:30:58,540 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:30:58,540 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:30:58,540 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1894326091] [2024-06-21 20:30:58,540 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:30:58,541 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:30:58,541 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:30:58,541 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:30:58,541 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:30:58,619 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-21 20:30:58,620 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 132 transitions, 1205 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 20:30:58,620 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:30:58,620 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-21 20:30:58,620 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:30:59,408 INFO L124 PetriNetUnfolderBase]: 2468/3715 cut-off events. [2024-06-21 20:30:59,408 INFO L125 PetriNetUnfolderBase]: For 67426/67429 co-relation queries the response was YES. [2024-06-21 20:30:59,457 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19980 conditions, 3715 events. 2468/3715 cut-off events. For 67426/67429 co-relation queries the response was YES. Maximal size of possible extension queue 143. Compared 18525 event pairs, 768 based on Foata normal form. 4/3716 useless extension candidates. Maximal degree in co-relation 19938. Up to 3262 conditions per place. [2024-06-21 20:30:59,466 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 103 selfloop transitions, 66 changer transitions 0/174 dead transitions. [2024-06-21 20:30:59,466 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 174 transitions, 1869 flow [2024-06-21 20:30:59,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:30:59,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:30:59,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 169 transitions. [2024-06-21 20:30:59,468 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48011363636363635 [2024-06-21 20:30:59,468 INFO L175 Difference]: Start difference. First operand has 101 places, 132 transitions, 1205 flow. Second operand 8 states and 169 transitions. [2024-06-21 20:30:59,468 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 174 transitions, 1869 flow [2024-06-21 20:30:59,510 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 174 transitions, 1764 flow, removed 9 selfloop flow, removed 5 redundant places. [2024-06-21 20:30:59,512 INFO L231 Difference]: Finished difference. Result has 104 places, 138 transitions, 1314 flow [2024-06-21 20:30:59,512 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1100, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=132, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1314, PETRI_PLACES=104, PETRI_TRANSITIONS=138} [2024-06-21 20:30:59,512 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 59 predicate places. [2024-06-21 20:30:59,512 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 138 transitions, 1314 flow [2024-06-21 20:30:59,512 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 20:30:59,513 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:30:59,513 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:30:59,513 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-21 20:30:59,513 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 20:30:59,514 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:30:59,514 INFO L85 PathProgramCache]: Analyzing trace with hash -247280035, now seen corresponding path program 3 times [2024-06-21 20:30:59,514 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:30:59,514 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1033547028] [2024-06-21 20:30:59,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:30:59,514 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:30:59,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:31:00,318 INFO 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 20:31:00,318 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:31:00,319 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1033547028] [2024-06-21 20:31:00,319 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1033547028] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:31:00,319 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:31:00,319 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:31:00,319 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2072402293] [2024-06-21 20:31:00,319 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:31:00,319 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:31:00,319 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:31:00,320 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:31:00,320 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:31:00,407 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-21 20:31:00,408 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 138 transitions, 1314 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 20:31:00,408 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:31:00,408 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-21 20:31:00,408 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:31:01,193 INFO L124 PetriNetUnfolderBase]: 2458/3701 cut-off events. [2024-06-21 20:31:01,194 INFO L125 PetriNetUnfolderBase]: For 73074/73077 co-relation queries the response was YES. [2024-06-21 20:31:01,203 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20259 conditions, 3701 events. 2458/3701 cut-off events. For 73074/73077 co-relation queries the response was YES. Maximal size of possible extension queue 143. Compared 18451 event pairs, 768 based on Foata normal form. 4/3702 useless extension candidates. Maximal degree in co-relation 20216. Up to 3254 conditions per place. [2024-06-21 20:31:01,214 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 96 selfloop transitions, 69 changer transitions 0/170 dead transitions. [2024-06-21 20:31:01,215 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 170 transitions, 1816 flow [2024-06-21 20:31:01,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:31:01,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:31:01,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 165 transitions. [2024-06-21 20:31:01,216 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46875 [2024-06-21 20:31:01,216 INFO L175 Difference]: Start difference. First operand has 104 places, 138 transitions, 1314 flow. Second operand 8 states and 165 transitions. [2024-06-21 20:31:01,216 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 170 transitions, 1816 flow [2024-06-21 20:31:01,260 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 170 transitions, 1692 flow, removed 21 selfloop flow, removed 4 redundant places. [2024-06-21 20:31:01,262 INFO L231 Difference]: Finished difference. Result has 108 places, 138 transitions, 1336 flow [2024-06-21 20:31:01,263 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1190, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=138, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1336, PETRI_PLACES=108, PETRI_TRANSITIONS=138} [2024-06-21 20:31:01,263 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 63 predicate places. [2024-06-21 20:31:01,263 INFO L495 AbstractCegarLoop]: Abstraction has has 108 places, 138 transitions, 1336 flow [2024-06-21 20:31:01,263 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 20:31:01,263 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:31:01,263 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:31:01,264 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-21 20:31:01,264 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 20:31:01,264 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:31:01,264 INFO L85 PathProgramCache]: Analyzing trace with hash -247287692, now seen corresponding path program 3 times [2024-06-21 20:31:01,264 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:31:01,264 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1634554003] [2024-06-21 20:31:01,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:31:01,265 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:31:01,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:31:02,070 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:31:02,070 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:31:02,070 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1634554003] [2024-06-21 20:31:02,070 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1634554003] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:31:02,070 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:31:02,070 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:31:02,070 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [666596729] [2024-06-21 20:31:02,070 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:31:02,071 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:31:02,071 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:31:02,071 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:31:02,071 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:31:02,151 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-21 20:31:02,151 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 138 transitions, 1336 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 20:31:02,151 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:31:02,151 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-21 20:31:02,151 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:31:02,950 INFO L124 PetriNetUnfolderBase]: 2469/3717 cut-off events. [2024-06-21 20:31:02,950 INFO L125 PetriNetUnfolderBase]: For 79105/79108 co-relation queries the response was YES. [2024-06-21 20:31:02,960 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20624 conditions, 3717 events. 2469/3717 cut-off events. For 79105/79108 co-relation queries the response was YES. Maximal size of possible extension queue 143. Compared 18528 event pairs, 824 based on Foata normal form. 4/3718 useless extension candidates. Maximal degree in co-relation 20580. Up to 3393 conditions per place. [2024-06-21 20:31:02,971 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 105 selfloop transitions, 61 changer transitions 0/171 dead transitions. [2024-06-21 20:31:02,971 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 171 transitions, 1879 flow [2024-06-21 20:31:02,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:31:02,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:31:02,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 160 transitions. [2024-06-21 20:31:02,972 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45454545454545453 [2024-06-21 20:31:02,972 INFO L175 Difference]: Start difference. First operand has 108 places, 138 transitions, 1336 flow. Second operand 8 states and 160 transitions. [2024-06-21 20:31:02,972 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 115 places, 171 transitions, 1879 flow [2024-06-21 20:31:03,011 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 171 transitions, 1724 flow, removed 3 selfloop flow, removed 7 redundant places. [2024-06-21 20:31:03,013 INFO L231 Difference]: Finished difference. Result has 109 places, 141 transitions, 1346 flow [2024-06-21 20:31:03,013 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1181, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=138, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1346, PETRI_PLACES=109, PETRI_TRANSITIONS=141} [2024-06-21 20:31:03,014 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 64 predicate places. [2024-06-21 20:31:03,014 INFO L495 AbstractCegarLoop]: Abstraction has has 109 places, 141 transitions, 1346 flow [2024-06-21 20:31:03,014 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 20:31:03,014 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:31:03,014 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:31:03,014 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-21 20:31:03,014 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 20:31:03,015 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:31:03,015 INFO L85 PathProgramCache]: Analyzing trace with hash 1733595455, now seen corresponding path program 4 times [2024-06-21 20:31:03,015 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:31:03,015 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1922321966] [2024-06-21 20:31:03,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:31:03,015 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:31:03,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:31:03,810 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:31:03,810 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:31:03,811 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1922321966] [2024-06-21 20:31:03,811 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1922321966] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:31:03,811 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:31:03,811 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:31:03,811 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [155449574] [2024-06-21 20:31:03,811 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:31:03,812 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:31:03,812 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:31:03,812 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:31:03,813 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:31:03,867 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-21 20:31:03,868 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 141 transitions, 1346 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 20:31:03,868 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:31:03,868 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-21 20:31:03,868 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:31:04,679 INFO L124 PetriNetUnfolderBase]: 2523/3798 cut-off events. [2024-06-21 20:31:04,679 INFO L125 PetriNetUnfolderBase]: For 87583/87595 co-relation queries the response was YES. [2024-06-21 20:31:04,690 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21285 conditions, 3798 events. 2523/3798 cut-off events. For 87583/87595 co-relation queries the response was YES. Maximal size of possible extension queue 143. Compared 18958 event pairs, 766 based on Foata normal form. 12/3799 useless extension candidates. Maximal degree in co-relation 21240. Up to 3316 conditions per place. [2024-06-21 20:31:04,703 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 103 selfloop transitions, 72 changer transitions 0/180 dead transitions. [2024-06-21 20:31:04,703 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 116 places, 180 transitions, 2044 flow [2024-06-21 20:31:04,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:31:04,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:31:04,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 165 transitions. [2024-06-21 20:31:04,704 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46875 [2024-06-21 20:31:04,704 INFO L175 Difference]: Start difference. First operand has 109 places, 141 transitions, 1346 flow. Second operand 8 states and 165 transitions. [2024-06-21 20:31:04,704 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 116 places, 180 transitions, 2044 flow [2024-06-21 20:31:04,764 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 180 transitions, 1936 flow, removed 9 selfloop flow, removed 5 redundant places. [2024-06-21 20:31:04,766 INFO L231 Difference]: Finished difference. Result has 112 places, 147 transitions, 1468 flow [2024-06-21 20:31:04,766 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1238, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=141, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1468, PETRI_PLACES=112, PETRI_TRANSITIONS=147} [2024-06-21 20:31:04,767 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 67 predicate places. [2024-06-21 20:31:04,767 INFO L495 AbstractCegarLoop]: Abstraction has has 112 places, 147 transitions, 1468 flow [2024-06-21 20:31:04,767 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 20:31:04,767 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:31:04,767 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:31:04,767 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-21 20:31:04,767 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:31:04,767 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:31:04,767 INFO L85 PathProgramCache]: Analyzing trace with hash 1748738685, now seen corresponding path program 5 times [2024-06-21 20:31:04,767 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:31:04,767 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1341899183] [2024-06-21 20:31:04,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:31:04,768 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:31:04,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:31:05,576 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:31:05,576 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:31:05,576 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1341899183] [2024-06-21 20:31:05,576 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1341899183] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:31:05,576 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:31:05,577 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:31:05,577 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1608286103] [2024-06-21 20:31:05,577 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:31:05,577 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:31:05,577 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:31:05,577 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:31:05,577 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:31:05,654 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-21 20:31:05,655 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 112 places, 147 transitions, 1468 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 20:31:05,655 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:31:05,655 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-21 20:31:05,655 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:31:06,438 INFO L124 PetriNetUnfolderBase]: 2513/3784 cut-off events. [2024-06-21 20:31:06,438 INFO L125 PetriNetUnfolderBase]: For 94226/94238 co-relation queries the response was YES. [2024-06-21 20:31:06,449 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21564 conditions, 3784 events. 2513/3784 cut-off events. For 94226/94238 co-relation queries the response was YES. Maximal size of possible extension queue 143. Compared 18884 event pairs, 771 based on Foata normal form. 12/3785 useless extension candidates. Maximal degree in co-relation 21518. Up to 3308 conditions per place. [2024-06-21 20:31:06,462 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 91 selfloop transitions, 80 changer transitions 0/176 dead transitions. [2024-06-21 20:31:06,462 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 176 transitions, 1986 flow [2024-06-21 20:31:06,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:31:06,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:31:06,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 160 transitions. [2024-06-21 20:31:06,463 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45454545454545453 [2024-06-21 20:31:06,463 INFO L175 Difference]: Start difference. First operand has 112 places, 147 transitions, 1468 flow. Second operand 8 states and 160 transitions. [2024-06-21 20:31:06,463 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 176 transitions, 1986 flow [2024-06-21 20:31:06,534 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 114 places, 176 transitions, 1794 flow, removed 24 selfloop flow, removed 5 redundant places. [2024-06-21 20:31:06,536 INFO L231 Difference]: Finished difference. Result has 115 places, 147 transitions, 1444 flow [2024-06-21 20:31:06,536 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1276, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=147, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=80, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1444, PETRI_PLACES=115, PETRI_TRANSITIONS=147} [2024-06-21 20:31:06,537 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 70 predicate places. [2024-06-21 20:31:06,537 INFO L495 AbstractCegarLoop]: Abstraction has has 115 places, 147 transitions, 1444 flow [2024-06-21 20:31:06,537 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 20:31:06,537 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:31:06,537 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:31:06,537 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-21 20:31:06,537 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 20:31:06,538 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:31:06,538 INFO L85 PathProgramCache]: Analyzing trace with hash -1515785907, now seen corresponding path program 6 times [2024-06-21 20:31:06,538 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:31:06,538 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [174444691] [2024-06-21 20:31:06,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:31:06,538 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:31:06,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:31:07,351 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:31:07,351 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:31:07,351 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [174444691] [2024-06-21 20:31:07,351 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [174444691] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:31:07,351 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:31:07,351 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:31:07,352 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [789677210] [2024-06-21 20:31:07,352 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:31:07,352 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:31:07,352 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:31:07,352 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:31:07,352 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:31:07,413 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-21 20:31:07,413 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 147 transitions, 1444 flow. Second operand has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:31:07,413 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:31:07,413 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-21 20:31:07,413 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:31:08,234 INFO L124 PetriNetUnfolderBase]: 2503/3770 cut-off events. [2024-06-21 20:31:08,234 INFO L125 PetriNetUnfolderBase]: For 99386/99398 co-relation queries the response was YES. [2024-06-21 20:31:08,247 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21662 conditions, 3770 events. 2503/3770 cut-off events. For 99386/99398 co-relation queries the response was YES. Maximal size of possible extension queue 143. Compared 18823 event pairs, 762 based on Foata normal form. 12/3771 useless extension candidates. Maximal degree in co-relation 21615. Up to 3300 conditions per place. [2024-06-21 20:31:08,259 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 99 selfloop transitions, 73 changer transitions 0/177 dead transitions. [2024-06-21 20:31:08,259 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 122 places, 177 transitions, 1884 flow [2024-06-21 20:31:08,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:31:08,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:31:08,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 160 transitions. [2024-06-21 20:31:08,260 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45454545454545453 [2024-06-21 20:31:08,260 INFO L175 Difference]: Start difference. First operand has 115 places, 147 transitions, 1444 flow. Second operand 8 states and 160 transitions. [2024-06-21 20:31:08,260 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 122 places, 177 transitions, 1884 flow [2024-06-21 20:31:08,303 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 177 transitions, 1684 flow, removed 12 selfloop flow, removed 7 redundant places. [2024-06-21 20:31:08,348 INFO L231 Difference]: Finished difference. Result has 116 places, 147 transitions, 1400 flow [2024-06-21 20:31:08,348 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1244, PETRI_DIFFERENCE_MINUEND_PLACES=108, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=147, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=73, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1400, PETRI_PLACES=116, PETRI_TRANSITIONS=147} [2024-06-21 20:31:08,348 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 71 predicate places. [2024-06-21 20:31:08,348 INFO L495 AbstractCegarLoop]: Abstraction has has 116 places, 147 transitions, 1400 flow [2024-06-21 20:31:08,348 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 20:31:08,348 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:31:08,348 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:31:08,349 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-21 20:31:08,349 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 20:31:08,349 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:31:08,349 INFO L85 PathProgramCache]: Analyzing trace with hash 1739534258, now seen corresponding path program 4 times [2024-06-21 20:31:08,349 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:31:08,349 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [673379058] [2024-06-21 20:31:08,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:31:08,350 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:31:08,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:31:09,151 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:31:09,151 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:31:09,151 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [673379058] [2024-06-21 20:31:09,151 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [673379058] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:31:09,151 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:31:09,151 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:31:09,151 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [894119567] [2024-06-21 20:31:09,151 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:31:09,151 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:31:09,151 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:31:09,152 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:31:09,152 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:31:09,213 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-21 20:31:09,214 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 147 transitions, 1400 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 20:31:09,214 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:31:09,214 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-21 20:31:09,214 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:31:10,056 INFO L124 PetriNetUnfolderBase]: 2498/3770 cut-off events. [2024-06-21 20:31:10,056 INFO L125 PetriNetUnfolderBase]: For 105285/105288 co-relation queries the response was YES. [2024-06-21 20:31:10,067 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21819 conditions, 3770 events. 2498/3770 cut-off events. For 105285/105288 co-relation queries the response was YES. Maximal size of possible extension queue 143. Compared 18866 event pairs, 838 based on Foata normal form. 4/3761 useless extension candidates. Maximal degree in co-relation 21771. Up to 3438 conditions per place. [2024-06-21 20:31:10,079 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 105 selfloop transitions, 61 changer transitions 0/171 dead transitions. [2024-06-21 20:31:10,079 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 171 transitions, 1812 flow [2024-06-21 20:31:10,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:31:10,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:31:10,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 155 transitions. [2024-06-21 20:31:10,080 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4403409090909091 [2024-06-21 20:31:10,080 INFO L175 Difference]: Start difference. First operand has 116 places, 147 transitions, 1400 flow. Second operand 8 states and 155 transitions. [2024-06-21 20:31:10,080 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 171 transitions, 1812 flow [2024-06-21 20:31:10,151 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 171 transitions, 1603 flow, removed 7 selfloop flow, removed 8 redundant places. [2024-06-21 20:31:10,153 INFO L231 Difference]: Finished difference. Result has 116 places, 147 transitions, 1323 flow [2024-06-21 20:31:10,153 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1191, PETRI_DIFFERENCE_MINUEND_PLACES=108, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=147, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1323, PETRI_PLACES=116, PETRI_TRANSITIONS=147} [2024-06-21 20:31:10,153 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 71 predicate places. [2024-06-21 20:31:10,153 INFO L495 AbstractCegarLoop]: Abstraction has has 116 places, 147 transitions, 1323 flow [2024-06-21 20:31:10,153 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 20:31:10,154 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:31:10,154 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:31:10,154 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-21 20:31:10,154 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 20:31:10,154 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:31:10,154 INFO L85 PathProgramCache]: Analyzing trace with hash -1506243084, now seen corresponding path program 1 times [2024-06-21 20:31:10,154 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:31:10,154 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [561904975] [2024-06-21 20:31:10,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:31:10,154 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:31:10,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:31:11,138 INFO 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 20:31:11,139 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:31:11,139 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [561904975] [2024-06-21 20:31:11,139 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [561904975] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:31:11,139 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:31:11,139 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:31:11,139 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [746901458] [2024-06-21 20:31:11,139 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:31:11,139 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:31:11,139 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:31:11,139 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:31:11,140 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:31:11,255 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-21 20:31:11,255 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 147 transitions, 1323 flow. Second operand has 9 states, 9 states have (on average 13.333333333333334) internal successors, (120), 9 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:31:11,255 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:31:11,256 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-21 20:31:11,256 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:31:11,989 INFO L124 PetriNetUnfolderBase]: 2071/3308 cut-off events. [2024-06-21 20:31:11,989 INFO L125 PetriNetUnfolderBase]: For 95584/95584 co-relation queries the response was YES. [2024-06-21 20:31:12,001 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18712 conditions, 3308 events. 2071/3308 cut-off events. For 95584/95584 co-relation queries the response was YES. Maximal size of possible extension queue 133. Compared 17677 event pairs, 669 based on Foata normal form. 4/3310 useless extension candidates. Maximal degree in co-relation 18663. Up to 2960 conditions per place. [2024-06-21 20:31:12,012 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 135 selfloop transitions, 16 changer transitions 0/176 dead transitions. [2024-06-21 20:31:12,012 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 176 transitions, 1747 flow [2024-06-21 20:31:12,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:31:12,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:31:12,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 163 transitions. [2024-06-21 20:31:12,013 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4630681818181818 [2024-06-21 20:31:12,013 INFO L175 Difference]: Start difference. First operand has 116 places, 147 transitions, 1323 flow. Second operand 8 states and 163 transitions. [2024-06-21 20:31:12,013 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 176 transitions, 1747 flow [2024-06-21 20:31:12,079 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 176 transitions, 1539 flow, removed 2 selfloop flow, removed 10 redundant places. [2024-06-21 20:31:12,081 INFO L231 Difference]: Finished difference. Result has 115 places, 152 transitions, 1214 flow [2024-06-21 20:31:12,081 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1115, PETRI_DIFFERENCE_MINUEND_PLACES=106, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=147, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=133, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1214, PETRI_PLACES=115, PETRI_TRANSITIONS=152} [2024-06-21 20:31:12,081 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 70 predicate places. [2024-06-21 20:31:12,081 INFO L495 AbstractCegarLoop]: Abstraction has has 115 places, 152 transitions, 1214 flow [2024-06-21 20:31:12,081 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.333333333333334) internal successors, (120), 9 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:31:12,081 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:31:12,082 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:31:12,082 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-21 20:31:12,082 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:31:12,082 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:31:12,082 INFO L85 PathProgramCache]: Analyzing trace with hash -1783897120, now seen corresponding path program 1 times [2024-06-21 20:31:12,082 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:31:12,082 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [698674199] [2024-06-21 20:31:12,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:31:12,083 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:31:12,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:31:13,211 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:31:13,211 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:31:13,211 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [698674199] [2024-06-21 20:31:13,211 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [698674199] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:31:13,211 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:31:13,211 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:31:13,211 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1719682950] [2024-06-21 20:31:13,211 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:31:13,211 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:31:13,211 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:31:13,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:31:13,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:31:13,305 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 44 [2024-06-21 20:31:13,305 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 152 transitions, 1214 flow. Second operand has 7 states, 7 states have (on average 15.857142857142858) internal successors, (111), 7 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:31:13,305 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:31:13,305 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 44 [2024-06-21 20:31:13,305 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:31:13,725 INFO L124 PetriNetUnfolderBase]: 1827/3072 cut-off events. [2024-06-21 20:31:13,725 INFO L125 PetriNetUnfolderBase]: For 98281/98281 co-relation queries the response was YES. [2024-06-21 20:31:13,736 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17841 conditions, 3072 events. 1827/3072 cut-off events. For 98281/98281 co-relation queries the response was YES. Maximal size of possible extension queue 133. Compared 17352 event pairs, 641 based on Foata normal form. 2/3072 useless extension candidates. Maximal degree in co-relation 17791. Up to 2582 conditions per place. [2024-06-21 20:31:13,747 INFO L140 encePairwiseOnDemand]: 36/44 looper letters, 104 selfloop transitions, 11 changer transitions 0/165 dead transitions. [2024-06-21 20:31:13,747 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 165 transitions, 1500 flow [2024-06-21 20:31:13,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 20:31:13,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 20:31:13,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 129 transitions. [2024-06-21 20:31:13,748 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48863636363636365 [2024-06-21 20:31:13,748 INFO L175 Difference]: Start difference. First operand has 115 places, 152 transitions, 1214 flow. Second operand 6 states and 129 transitions. [2024-06-21 20:31:13,748 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 165 transitions, 1500 flow [2024-06-21 20:31:13,820 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 165 transitions, 1441 flow, removed 16 selfloop flow, removed 5 redundant places. [2024-06-21 20:31:13,822 INFO L231 Difference]: Finished difference. Result has 116 places, 155 transitions, 1217 flow [2024-06-21 20:31:13,822 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1155, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=152, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=141, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1217, PETRI_PLACES=116, PETRI_TRANSITIONS=155} [2024-06-21 20:31:13,823 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 71 predicate places. [2024-06-21 20:31:13,823 INFO L495 AbstractCegarLoop]: Abstraction has has 116 places, 155 transitions, 1217 flow [2024-06-21 20:31:13,823 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.857142857142858) internal successors, (111), 7 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:31:13,823 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:31:13,823 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:31:13,823 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-21 20:31:13,823 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 20:31:13,824 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:31:13,824 INFO L85 PathProgramCache]: Analyzing trace with hash -857104494, now seen corresponding path program 1 times [2024-06-21 20:31:13,824 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:31:13,824 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [644914647] [2024-06-21 20:31:13,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:31:13,824 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:31:13,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:31:14,769 INFO 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 20:31:14,769 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:31:14,770 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [644914647] [2024-06-21 20:31:14,770 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [644914647] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:31:14,770 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:31:14,770 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:31:14,770 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [720676101] [2024-06-21 20:31:14,770 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:31:14,770 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:31:14,770 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:31:14,770 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:31:14,770 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:31:14,904 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-21 20:31:14,905 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 155 transitions, 1217 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 20:31:14,905 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:31:14,905 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-21 20:31:14,905 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:31:15,700 INFO L124 PetriNetUnfolderBase]: 2492/3762 cut-off events. [2024-06-21 20:31:15,700 INFO L125 PetriNetUnfolderBase]: For 122890/122894 co-relation queries the response was YES. [2024-06-21 20:31:15,713 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22653 conditions, 3762 events. 2492/3762 cut-off events. For 122890/122894 co-relation queries the response was YES. Maximal size of possible extension queue 143. Compared 18834 event pairs, 762 based on Foata normal form. 6/3766 useless extension candidates. Maximal degree in co-relation 22602. Up to 3567 conditions per place. [2024-06-21 20:31:15,726 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 166 selfloop transitions, 27 changer transitions 0/198 dead transitions. [2024-06-21 20:31:15,727 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 124 places, 198 transitions, 1777 flow [2024-06-21 20:31:15,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:31:15,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:31:15,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 178 transitions. [2024-06-21 20:31:15,728 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4494949494949495 [2024-06-21 20:31:15,728 INFO L175 Difference]: Start difference. First operand has 116 places, 155 transitions, 1217 flow. Second operand 9 states and 178 transitions. [2024-06-21 20:31:15,728 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 124 places, 198 transitions, 1777 flow [2024-06-21 20:31:15,810 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 198 transitions, 1737 flow, removed 11 selfloop flow, removed 4 redundant places. [2024-06-21 20:31:15,812 INFO L231 Difference]: Finished difference. Result has 121 places, 158 transitions, 1287 flow [2024-06-21 20:31:15,812 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1177, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=155, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=128, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1287, PETRI_PLACES=121, PETRI_TRANSITIONS=158} [2024-06-21 20:31:15,812 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 76 predicate places. [2024-06-21 20:31:15,812 INFO L495 AbstractCegarLoop]: Abstraction has has 121 places, 158 transitions, 1287 flow [2024-06-21 20:31:15,812 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 20:31:15,812 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:31:15,813 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:31:15,813 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-21 20:31:15,813 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 20:31:15,813 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:31:15,813 INFO L85 PathProgramCache]: Analyzing trace with hash 669184126, now seen corresponding path program 2 times [2024-06-21 20:31:15,813 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:31:15,813 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [520235165] [2024-06-21 20:31:15,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:31:15,813 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:31:15,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:31:16,785 INFO 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 20:31:16,785 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:31:16,785 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [520235165] [2024-06-21 20:31:16,785 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [520235165] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:31:16,785 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:31:16,785 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:31:16,785 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [353947800] [2024-06-21 20:31:16,785 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:31:16,786 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:31:16,786 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:31:16,786 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:31:16,786 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:31:16,874 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-21 20:31:16,874 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 121 places, 158 transitions, 1287 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 20:31:16,874 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:31:16,874 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-21 20:31:16,875 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:31:17,774 INFO L124 PetriNetUnfolderBase]: 2503/3785 cut-off events. [2024-06-21 20:31:17,774 INFO L125 PetriNetUnfolderBase]: For 131934/131941 co-relation queries the response was YES. [2024-06-21 20:31:17,788 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23451 conditions, 3785 events. 2503/3785 cut-off events. For 131934/131941 co-relation queries the response was YES. Maximal size of possible extension queue 143. Compared 19070 event pairs, 772 based on Foata normal form. 8/3790 useless extension candidates. Maximal degree in co-relation 23399. Up to 3392 conditions per place. [2024-06-21 20:31:17,802 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 118 selfloop transitions, 79 changer transitions 0/202 dead transitions. [2024-06-21 20:31:17,802 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 129 places, 202 transitions, 2009 flow [2024-06-21 20:31:17,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:31:17,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:31:17,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 183 transitions. [2024-06-21 20:31:17,804 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4621212121212121 [2024-06-21 20:31:17,804 INFO L175 Difference]: Start difference. First operand has 121 places, 158 transitions, 1287 flow. Second operand 9 states and 183 transitions. [2024-06-21 20:31:17,804 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 129 places, 202 transitions, 2009 flow [2024-06-21 20:31:17,914 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 202 transitions, 1923 flow, removed 18 selfloop flow, removed 7 redundant places. [2024-06-21 20:31:17,916 INFO L231 Difference]: Finished difference. Result has 123 places, 164 transitions, 1469 flow [2024-06-21 20:31:17,916 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1201, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=158, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1469, PETRI_PLACES=123, PETRI_TRANSITIONS=164} [2024-06-21 20:31:17,916 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 78 predicate places. [2024-06-21 20:31:17,916 INFO L495 AbstractCegarLoop]: Abstraction has has 123 places, 164 transitions, 1469 flow [2024-06-21 20:31:17,917 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 20:31:17,917 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:31:17,917 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:31:17,917 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-21 20:31:17,917 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 20:31:17,917 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:31:17,917 INFO L85 PathProgramCache]: Analyzing trace with hash 669184312, now seen corresponding path program 1 times [2024-06-21 20:31:17,917 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:31:17,917 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1061663315] [2024-06-21 20:31:17,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:31:17,917 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:31:17,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:31:18,826 INFO 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 20:31:18,827 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:31:18,827 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1061663315] [2024-06-21 20:31:18,827 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1061663315] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:31:18,827 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:31:18,827 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:31:18,827 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1037572066] [2024-06-21 20:31:18,827 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:31:18,827 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:31:18,827 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:31:18,827 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:31:18,828 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:31:18,939 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-21 20:31:18,939 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 164 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 20:31:18,939 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:31:18,940 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-21 20:31:18,940 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:31:19,831 INFO L124 PetriNetUnfolderBase]: 2525/3817 cut-off events. [2024-06-21 20:31:19,831 INFO L125 PetriNetUnfolderBase]: For 143922/143929 co-relation queries the response was YES. [2024-06-21 20:31:19,845 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24390 conditions, 3817 events. 2525/3817 cut-off events. For 143922/143929 co-relation queries the response was YES. Maximal size of possible extension queue 143. Compared 19273 event pairs, 689 based on Foata normal form. 8/3822 useless extension candidates. Maximal degree in co-relation 24337. Up to 3134 conditions per place. [2024-06-21 20:31:19,860 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 115 selfloop transitions, 92 changer transitions 0/212 dead transitions. [2024-06-21 20:31:19,860 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 131 places, 212 transitions, 2223 flow [2024-06-21 20:31:19,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:31:19,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:31:19,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 190 transitions. [2024-06-21 20:31:19,861 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4797979797979798 [2024-06-21 20:31:19,861 INFO L175 Difference]: Start difference. First operand has 123 places, 164 transitions, 1469 flow. Second operand 9 states and 190 transitions. [2024-06-21 20:31:19,862 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 131 places, 212 transitions, 2223 flow [2024-06-21 20:31:19,979 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 126 places, 212 transitions, 2096 flow, removed 27 selfloop flow, removed 5 redundant places. [2024-06-21 20:31:19,981 INFO L231 Difference]: Finished difference. Result has 127 places, 170 transitions, 1628 flow [2024-06-21 20:31:19,982 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1342, PETRI_DIFFERENCE_MINUEND_PLACES=118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=164, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=89, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1628, PETRI_PLACES=127, PETRI_TRANSITIONS=170} [2024-06-21 20:31:19,982 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 82 predicate places. [2024-06-21 20:31:19,982 INFO L495 AbstractCegarLoop]: Abstraction has has 127 places, 170 transitions, 1628 flow [2024-06-21 20:31:19,982 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 20:31:19,982 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:31:19,983 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:31:19,983 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-21 20:31:19,983 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 20:31:19,983 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:31:19,983 INFO L85 PathProgramCache]: Analyzing trace with hash -1276848926, now seen corresponding path program 2 times [2024-06-21 20:31:19,983 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:31:19,983 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1818590141] [2024-06-21 20:31:19,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:31:19,984 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:31:19,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:31:20,885 INFO 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 20:31:20,885 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:31:20,886 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1818590141] [2024-06-21 20:31:20,886 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1818590141] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:31:20,886 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:31:20,886 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:31:20,886 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1614301735] [2024-06-21 20:31:20,886 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:31:20,886 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:31:20,886 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:31:20,886 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:31:20,887 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:31:20,974 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-21 20:31:20,974 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 127 places, 170 transitions, 1628 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 20:31:20,974 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:31:20,974 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-21 20:31:20,974 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:31:21,887 INFO L124 PetriNetUnfolderBase]: 2579/3889 cut-off events. [2024-06-21 20:31:21,887 INFO L125 PetriNetUnfolderBase]: For 156388/156395 co-relation queries the response was YES. [2024-06-21 20:31:21,902 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25868 conditions, 3889 events. 2579/3889 cut-off events. For 156388/156395 co-relation queries the response was YES. Maximal size of possible extension queue 143. Compared 19549 event pairs, 683 based on Foata normal form. 8/3894 useless extension candidates. Maximal degree in co-relation 25813. Up to 3180 conditions per place. [2024-06-21 20:31:21,917 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 129 selfloop transitions, 86 changer transitions 0/220 dead transitions. [2024-06-21 20:31:21,917 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 135 places, 220 transitions, 2542 flow [2024-06-21 20:31:21,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:31:21,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:31:21,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 192 transitions. [2024-06-21 20:31:21,918 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48484848484848486 [2024-06-21 20:31:21,918 INFO L175 Difference]: Start difference. First operand has 127 places, 170 transitions, 1628 flow. Second operand 9 states and 192 transitions. [2024-06-21 20:31:21,918 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 135 places, 220 transitions, 2542 flow [2024-06-21 20:31:22,036 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 130 places, 220 transitions, 2376 flow, removed 37 selfloop flow, removed 5 redundant places. [2024-06-21 20:31:22,038 INFO L231 Difference]: Finished difference. Result has 131 places, 176 transitions, 1742 flow [2024-06-21 20:31:22,038 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1486, PETRI_DIFFERENCE_MINUEND_PLACES=122, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=170, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=80, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1742, PETRI_PLACES=131, PETRI_TRANSITIONS=176} [2024-06-21 20:31:22,039 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 86 predicate places. [2024-06-21 20:31:22,039 INFO L495 AbstractCegarLoop]: Abstraction has has 131 places, 176 transitions, 1742 flow [2024-06-21 20:31:22,039 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 20:31:22,039 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:31:22,039 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:31:22,039 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-21 20:31:22,039 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 20:31:22,039 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:31:22,039 INFO L85 PathProgramCache]: Analyzing trace with hash 751534012, now seen corresponding path program 3 times [2024-06-21 20:31:22,039 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:31:22,040 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [270443921] [2024-06-21 20:31:22,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:31:22,040 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:31:22,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:31:22,951 INFO 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 20:31:22,951 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:31:22,952 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [270443921] [2024-06-21 20:31:22,952 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [270443921] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:31:22,952 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:31:22,952 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:31:22,952 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1995699246] [2024-06-21 20:31:22,952 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:31:22,952 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:31:22,952 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:31:22,952 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:31:22,953 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:31:23,072 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-21 20:31:23,072 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 131 places, 176 transitions, 1742 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 20:31:23,072 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:31:23,072 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-21 20:31:23,072 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:31:24,110 INFO L124 PetriNetUnfolderBase]: 2569/3885 cut-off events. [2024-06-21 20:31:24,111 INFO L125 PetriNetUnfolderBase]: For 163406/163413 co-relation queries the response was YES. [2024-06-21 20:31:24,124 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26117 conditions, 3885 events. 2569/3885 cut-off events. For 163406/163413 co-relation queries the response was YES. Maximal size of possible extension queue 143. Compared 19654 event pairs, 685 based on Foata normal form. 8/3890 useless extension candidates. Maximal degree in co-relation 26060. Up to 3172 conditions per place. [2024-06-21 20:31:24,137 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 125 selfloop transitions, 87 changer transitions 0/217 dead transitions. [2024-06-21 20:31:24,137 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 139 places, 217 transitions, 2426 flow [2024-06-21 20:31:24,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:31:24,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:31:24,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 188 transitions. [2024-06-21 20:31:24,138 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47474747474747475 [2024-06-21 20:31:24,138 INFO L175 Difference]: Start difference. First operand has 131 places, 176 transitions, 1742 flow. Second operand 9 states and 188 transitions. [2024-06-21 20:31:24,138 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 139 places, 217 transitions, 2426 flow [2024-06-21 20:31:24,248 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 134 places, 217 transitions, 2262 flow, removed 23 selfloop flow, removed 5 redundant places. [2024-06-21 20:31:24,250 INFO L231 Difference]: Finished difference. Result has 135 places, 176 transitions, 1760 flow [2024-06-21 20:31:24,250 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1578, PETRI_DIFFERENCE_MINUEND_PLACES=126, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=176, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=87, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1760, PETRI_PLACES=135, PETRI_TRANSITIONS=176} [2024-06-21 20:31:24,250 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 90 predicate places. [2024-06-21 20:31:24,251 INFO L495 AbstractCegarLoop]: Abstraction has has 135 places, 176 transitions, 1760 flow [2024-06-21 20:31:24,251 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 20:31:24,251 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:31:24,251 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:31:24,251 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-21 20:31:24,251 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 20:31:24,251 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:31:24,252 INFO L85 PathProgramCache]: Analyzing trace with hash 751527316, now seen corresponding path program 3 times [2024-06-21 20:31:24,252 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:31:24,252 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1586111018] [2024-06-21 20:31:24,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:31:24,252 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:31:24,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:31:25,161 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 20:31:25,161 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:31:25,161 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1586111018] [2024-06-21 20:31:25,161 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1586111018] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:31:25,161 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:31:25,161 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:31:25,161 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2053626034] [2024-06-21 20:31:25,161 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:31:25,161 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:31:25,161 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:31:25,162 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:31:25,162 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:31:25,253 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-21 20:31:25,254 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 176 transitions, 1760 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 20:31:25,254 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:31:25,254 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-21 20:31:25,254 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:31:26,196 INFO L124 PetriNetUnfolderBase]: 2580/3901 cut-off events. [2024-06-21 20:31:26,196 INFO L125 PetriNetUnfolderBase]: For 171685/171692 co-relation queries the response was YES. [2024-06-21 20:31:26,211 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26520 conditions, 3901 events. 2580/3901 cut-off events. For 171685/171692 co-relation queries the response was YES. Maximal size of possible extension queue 143. Compared 19708 event pairs, 756 based on Foata normal form. 8/3906 useless extension candidates. Maximal degree in co-relation 26462. Up to 3500 conditions per place. [2024-06-21 20:31:26,224 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 136 selfloop transitions, 75 changer transitions 0/216 dead transitions. [2024-06-21 20:31:26,224 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 143 places, 216 transitions, 2472 flow [2024-06-21 20:31:26,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:31:26,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:31:26,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 181 transitions. [2024-06-21 20:31:26,225 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45707070707070707 [2024-06-21 20:31:26,225 INFO L175 Difference]: Start difference. First operand has 135 places, 176 transitions, 1760 flow. Second operand 9 states and 181 transitions. [2024-06-21 20:31:26,225 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 143 places, 216 transitions, 2472 flow [2024-06-21 20:31:26,368 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 135 places, 216 transitions, 2286 flow, removed 3 selfloop flow, removed 8 redundant places. [2024-06-21 20:31:26,371 INFO L231 Difference]: Finished difference. Result has 136 places, 179 transitions, 1774 flow [2024-06-21 20:31:26,371 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1574, PETRI_DIFFERENCE_MINUEND_PLACES=127, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=176, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=104, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1774, PETRI_PLACES=136, PETRI_TRANSITIONS=179} [2024-06-21 20:31:26,371 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 91 predicate places. [2024-06-21 20:31:26,371 INFO L495 AbstractCegarLoop]: Abstraction has has 136 places, 179 transitions, 1774 flow [2024-06-21 20:31:26,371 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 20:31:26,371 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:31:26,371 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:31:26,371 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-21 20:31:26,372 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 20:31:26,372 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:31:26,372 INFO L85 PathProgramCache]: Analyzing trace with hash -1270355666, now seen corresponding path program 4 times [2024-06-21 20:31:26,372 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:31:26,372 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [30419101] [2024-06-21 20:31:26,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:31:26,372 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:31:26,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:31:27,326 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 20:31:27,326 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:31:27,326 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [30419101] [2024-06-21 20:31:27,326 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [30419101] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:31:27,326 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:31:27,326 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:31:27,326 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1709395053] [2024-06-21 20:31:27,326 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:31:27,327 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:31:27,327 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:31:27,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:31:27,327 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:31:27,487 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-21 20:31:27,488 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 136 places, 179 transitions, 1774 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 20:31:27,488 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:31:27,488 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-21 20:31:27,488 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:31:28,452 INFO L124 PetriNetUnfolderBase]: 2634/3984 cut-off events. [2024-06-21 20:31:28,452 INFO L125 PetriNetUnfolderBase]: For 185233/185236 co-relation queries the response was YES. [2024-06-21 20:31:28,468 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27196 conditions, 3984 events. 2634/3984 cut-off events. For 185233/185236 co-relation queries the response was YES. Maximal size of possible extension queue 143. Compared 20198 event pairs, 709 based on Foata normal form. 4/3985 useless extension candidates. Maximal degree in co-relation 27137. Up to 3234 conditions per place. [2024-06-21 20:31:28,484 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 127 selfloop transitions, 92 changer transitions 0/224 dead transitions. [2024-06-21 20:31:28,484 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 144 places, 224 transitions, 2680 flow [2024-06-21 20:31:28,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:31:28,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:31:28,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 188 transitions. [2024-06-21 20:31:28,485 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47474747474747475 [2024-06-21 20:31:28,485 INFO L175 Difference]: Start difference. First operand has 136 places, 179 transitions, 1774 flow. Second operand 9 states and 188 transitions. [2024-06-21 20:31:28,485 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 144 places, 224 transitions, 2680 flow [2024-06-21 20:31:28,655 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 138 places, 224 transitions, 2539 flow, removed 15 selfloop flow, removed 6 redundant places. [2024-06-21 20:31:28,657 INFO L231 Difference]: Finished difference. Result has 139 places, 185 transitions, 1907 flow [2024-06-21 20:31:28,658 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1633, PETRI_DIFFERENCE_MINUEND_PLACES=130, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=179, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=86, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1907, PETRI_PLACES=139, PETRI_TRANSITIONS=185} [2024-06-21 20:31:28,658 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 94 predicate places. [2024-06-21 20:31:28,658 INFO L495 AbstractCegarLoop]: Abstraction has has 139 places, 185 transitions, 1907 flow [2024-06-21 20:31:28,658 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 20:31:28,658 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:31:28,658 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:31:28,658 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-21 20:31:28,658 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:31:28,659 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:31:28,659 INFO L85 PathProgramCache]: Analyzing trace with hash 924017206, now seen corresponding path program 4 times [2024-06-21 20:31:28,659 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:31:28,659 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1897737506] [2024-06-21 20:31:28,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:31:28,659 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:31:28,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:31:29,589 INFO 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 20:31:29,589 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:31:29,589 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1897737506] [2024-06-21 20:31:29,589 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1897737506] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:31:29,589 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:31:29,589 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:31:29,589 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [883966607] [2024-06-21 20:31:29,590 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:31:29,590 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:31:29,590 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:31:29,590 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:31:29,590 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:31:29,704 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-21 20:31:29,705 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 139 places, 185 transitions, 1907 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 20:31:29,705 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:31:29,705 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-21 20:31:29,705 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:31:30,625 INFO L124 PetriNetUnfolderBase]: 2645/4005 cut-off events. [2024-06-21 20:31:30,625 INFO L125 PetriNetUnfolderBase]: For 194977/194980 co-relation queries the response was YES. [2024-06-21 20:31:30,640 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27742 conditions, 4005 events. 2645/4005 cut-off events. For 194977/194980 co-relation queries the response was YES. Maximal size of possible extension queue 143. Compared 20320 event pairs, 753 based on Foata normal form. 4/4006 useless extension candidates. Maximal degree in co-relation 27682. Up to 3590 conditions per place. [2024-06-21 20:31:30,655 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 142 selfloop transitions, 75 changer transitions 0/222 dead transitions. [2024-06-21 20:31:30,655 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 147 places, 222 transitions, 2630 flow [2024-06-21 20:31:30,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:31:30,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:31:30,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 179 transitions. [2024-06-21 20:31:30,656 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45202020202020204 [2024-06-21 20:31:30,656 INFO L175 Difference]: Start difference. First operand has 139 places, 185 transitions, 1907 flow. Second operand 9 states and 179 transitions. [2024-06-21 20:31:30,656 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 147 places, 222 transitions, 2630 flow [2024-06-21 20:31:30,837 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 142 places, 222 transitions, 2483 flow, removed 16 selfloop flow, removed 5 redundant places. [2024-06-21 20:31:30,840 INFO L231 Difference]: Finished difference. Result has 143 places, 188 transitions, 1963 flow [2024-06-21 20:31:30,840 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1760, PETRI_DIFFERENCE_MINUEND_PLACES=134, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=185, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=113, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1963, PETRI_PLACES=143, PETRI_TRANSITIONS=188} [2024-06-21 20:31:30,840 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 98 predicate places. [2024-06-21 20:31:30,840 INFO L495 AbstractCegarLoop]: Abstraction has has 143 places, 188 transitions, 1963 flow [2024-06-21 20:31:30,840 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 20:31:30,841 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:31:30,841 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:31:30,841 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-21 20:31:30,841 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:31:30,841 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:31:30,841 INFO L85 PathProgramCache]: Analyzing trace with hash -1270592816, now seen corresponding path program 5 times [2024-06-21 20:31:30,841 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:31:30,841 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [836641654] [2024-06-21 20:31:30,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:31:30,841 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:31:30,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:31:31,773 INFO 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 20:31:31,773 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:31:31,773 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [836641654] [2024-06-21 20:31:31,773 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [836641654] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:31:31,773 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:31:31,773 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:31:31,773 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2027010941] [2024-06-21 20:31:31,773 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:31:31,774 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:31:31,775 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:31:31,776 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:31:31,776 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:31:31,875 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-21 20:31:31,876 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 143 places, 188 transitions, 1963 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 20:31:31,876 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:31:31,876 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-21 20:31:31,876 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:31:32,938 INFO L124 PetriNetUnfolderBase]: 2667/4037 cut-off events. [2024-06-21 20:31:32,938 INFO L125 PetriNetUnfolderBase]: For 206870/206873 co-relation queries the response was YES. [2024-06-21 20:31:32,953 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28048 conditions, 4037 events. 2667/4037 cut-off events. For 206870/206873 co-relation queries the response was YES. Maximal size of possible extension queue 143. Compared 20500 event pairs, 707 based on Foata normal form. 4/4038 useless extension candidates. Maximal degree in co-relation 27987. Up to 3269 conditions per place. [2024-06-21 20:31:32,970 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 136 selfloop transitions, 91 changer transitions 0/232 dead transitions. [2024-06-21 20:31:32,970 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 151 places, 232 transitions, 2867 flow [2024-06-21 20:31:32,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:31:32,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:31:32,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 190 transitions. [2024-06-21 20:31:32,971 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4797979797979798 [2024-06-21 20:31:32,971 INFO L175 Difference]: Start difference. First operand has 143 places, 188 transitions, 1963 flow. Second operand 9 states and 190 transitions. [2024-06-21 20:31:32,971 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 151 places, 232 transitions, 2867 flow [2024-06-21 20:31:33,190 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 145 places, 232 transitions, 2721 flow, removed 15 selfloop flow, removed 6 redundant places. [2024-06-21 20:31:33,193 INFO L231 Difference]: Finished difference. Result has 146 places, 191 transitions, 2045 flow [2024-06-21 20:31:33,193 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1817, PETRI_DIFFERENCE_MINUEND_PLACES=137, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=188, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2045, PETRI_PLACES=146, PETRI_TRANSITIONS=191} [2024-06-21 20:31:33,194 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 101 predicate places. [2024-06-21 20:31:33,194 INFO L495 AbstractCegarLoop]: Abstraction has has 146 places, 191 transitions, 2045 flow [2024-06-21 20:31:33,194 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 20:31:33,194 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:31:33,194 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:31:33,194 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-21 20:31:33,194 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:31:33,195 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:31:33,195 INFO L85 PathProgramCache]: Analyzing trace with hash 893696956, now seen corresponding path program 6 times [2024-06-21 20:31:33,195 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:31:33,195 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1865630939] [2024-06-21 20:31:33,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:31:33,195 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:31:33,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:31:34,209 INFO 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 20:31:34,209 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:31:34,209 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1865630939] [2024-06-21 20:31:34,209 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1865630939] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:31:34,209 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:31:34,210 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:31:34,210 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1901929335] [2024-06-21 20:31:34,210 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:31:34,210 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:31:34,210 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:31:34,210 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:31:34,210 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:31:34,293 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-21 20:31:34,293 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 146 places, 191 transitions, 2045 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 20:31:34,294 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:31:34,294 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-21 20:31:34,294 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:31:35,308 INFO L124 PetriNetUnfolderBase]: 2657/4023 cut-off events. [2024-06-21 20:31:35,308 INFO L125 PetriNetUnfolderBase]: For 215660/215663 co-relation queries the response was YES. [2024-06-21 20:31:35,324 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28274 conditions, 4023 events. 2657/4023 cut-off events. For 215660/215663 co-relation queries the response was YES. Maximal size of possible extension queue 143. Compared 20458 event pairs, 707 based on Foata normal form. 4/4024 useless extension candidates. Maximal degree in co-relation 28212. Up to 3261 conditions per place. [2024-06-21 20:31:35,341 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 135 selfloop transitions, 90 changer transitions 0/230 dead transitions. [2024-06-21 20:31:35,341 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 154 places, 230 transitions, 2767 flow [2024-06-21 20:31:35,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:31:35,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:31:35,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 189 transitions. [2024-06-21 20:31:35,342 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4772727272727273 [2024-06-21 20:31:35,342 INFO L175 Difference]: Start difference. First operand has 146 places, 191 transitions, 2045 flow. Second operand 9 states and 189 transitions. [2024-06-21 20:31:35,342 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 154 places, 230 transitions, 2767 flow [2024-06-21 20:31:35,511 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 148 places, 230 transitions, 2563 flow, removed 20 selfloop flow, removed 6 redundant places. [2024-06-21 20:31:35,514 INFO L231 Difference]: Finished difference. Result has 149 places, 191 transitions, 2029 flow [2024-06-21 20:31:35,514 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1841, PETRI_DIFFERENCE_MINUEND_PLACES=140, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=191, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=90, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=101, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2029, PETRI_PLACES=149, PETRI_TRANSITIONS=191} [2024-06-21 20:31:35,515 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 104 predicate places. [2024-06-21 20:31:35,515 INFO L495 AbstractCegarLoop]: Abstraction has has 149 places, 191 transitions, 2029 flow [2024-06-21 20:31:35,516 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 20:31:35,516 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:31:35,516 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:31:35,516 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-21 20:31:35,516 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 20:31:35,516 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:31:35,516 INFO L85 PathProgramCache]: Analyzing trace with hash 519464384, now seen corresponding path program 1 times [2024-06-21 20:31:35,516 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:31:35,516 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [207763299] [2024-06-21 20:31:35,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:31:35,516 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:31:35,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:31:36,258 INFO 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 20:31:36,258 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:31:36,258 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [207763299] [2024-06-21 20:31:36,258 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [207763299] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:31:36,258 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:31:36,258 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:31:36,258 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [526343598] [2024-06-21 20:31:36,258 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:31:36,258 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:31:36,258 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:31:36,259 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:31:36,259 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:31:36,325 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 44 [2024-06-21 20:31:36,325 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 149 places, 191 transitions, 2029 flow. Second operand has 7 states, 7 states have (on average 14.857142857142858) internal successors, (104), 7 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:31:36,325 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:31:36,325 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 44 [2024-06-21 20:31:36,325 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:31:36,956 INFO L124 PetriNetUnfolderBase]: 2195/3552 cut-off events. [2024-06-21 20:31:36,956 INFO L125 PetriNetUnfolderBase]: For 221997/222001 co-relation queries the response was YES. [2024-06-21 20:31:36,980 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25854 conditions, 3552 events. 2195/3552 cut-off events. For 221997/222001 co-relation queries the response was YES. Maximal size of possible extension queue 143. Compared 19783 event pairs, 708 based on Foata normal form. 5/3551 useless extension candidates. Maximal degree in co-relation 25791. Up to 3040 conditions per place. [2024-06-21 20:31:36,999 INFO L140 encePairwiseOnDemand]: 36/44 looper letters, 136 selfloop transitions, 13 changer transitions 0/210 dead transitions. [2024-06-21 20:31:36,999 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 154 places, 210 transitions, 2409 flow [2024-06-21 20:31:37,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 20:31:37,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 20:31:37,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 129 transitions. [2024-06-21 20:31:37,000 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48863636363636365 [2024-06-21 20:31:37,000 INFO L175 Difference]: Start difference. First operand has 149 places, 191 transitions, 2029 flow. Second operand 6 states and 129 transitions. [2024-06-21 20:31:37,000 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 154 places, 210 transitions, 2409 flow [2024-06-21 20:31:37,200 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 145 places, 210 transitions, 2186 flow, removed 0 selfloop flow, removed 9 redundant places. [2024-06-21 20:31:37,202 INFO L231 Difference]: Finished difference. Result has 146 places, 194 transitions, 1873 flow [2024-06-21 20:31:37,202 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1806, PETRI_DIFFERENCE_MINUEND_PLACES=140, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=191, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=178, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1873, PETRI_PLACES=146, PETRI_TRANSITIONS=194} [2024-06-21 20:31:37,203 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 101 predicate places. [2024-06-21 20:31:37,203 INFO L495 AbstractCegarLoop]: Abstraction has has 146 places, 194 transitions, 1873 flow [2024-06-21 20:31:37,203 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.857142857142858) internal successors, (104), 7 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:31:37,203 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:31:37,203 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:31:37,203 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-21 20:31:37,203 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 20:31:37,203 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:31:37,203 INFO L85 PathProgramCache]: Analyzing trace with hash 255508814, now seen corresponding path program 7 times [2024-06-21 20:31:37,203 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:31:37,203 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1593283811] [2024-06-21 20:31:37,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:31:37,204 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:31:37,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:31:38,121 INFO 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 20:31:38,121 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:31:38,121 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1593283811] [2024-06-21 20:31:38,121 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1593283811] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:31:38,121 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:31:38,121 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:31:38,121 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [788885078] [2024-06-21 20:31:38,121 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:31:38,122 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:31:38,122 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:31:38,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:31:38,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:31:38,213 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-21 20:31:38,214 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 146 places, 194 transitions, 1873 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 20:31:38,214 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:31:38,214 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-21 20:31:38,214 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:31:39,265 INFO L124 PetriNetUnfolderBase]: 2716/4123 cut-off events. [2024-06-21 20:31:39,266 INFO L125 PetriNetUnfolderBase]: For 239186/239189 co-relation queries the response was YES. [2024-06-21 20:31:39,280 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29307 conditions, 4123 events. 2716/4123 cut-off events. For 239186/239189 co-relation queries the response was YES. Maximal size of possible extension queue 146. Compared 21102 event pairs, 723 based on Foata normal form. 6/4116 useless extension candidates. Maximal degree in co-relation 29243. Up to 3314 conditions per place. [2024-06-21 20:31:39,293 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 137 selfloop transitions, 96 changer transitions 0/238 dead transitions. [2024-06-21 20:31:39,293 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 154 places, 238 transitions, 2849 flow [2024-06-21 20:31:39,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:31:39,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:31:39,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 187 transitions. [2024-06-21 20:31:39,294 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4722222222222222 [2024-06-21 20:31:39,294 INFO L175 Difference]: Start difference. First operand has 146 places, 194 transitions, 1873 flow. Second operand 9 states and 187 transitions. [2024-06-21 20:31:39,294 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 154 places, 238 transitions, 2849 flow [2024-06-21 20:31:39,431 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 150 places, 238 transitions, 2806 flow, removed 11 selfloop flow, removed 4 redundant places. [2024-06-21 20:31:39,433 INFO L231 Difference]: Finished difference. Result has 151 places, 200 transitions, 2118 flow [2024-06-21 20:31:39,434 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1830, PETRI_DIFFERENCE_MINUEND_PLACES=142, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=194, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=90, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=104, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2118, PETRI_PLACES=151, PETRI_TRANSITIONS=200} [2024-06-21 20:31:39,434 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 106 predicate places. [2024-06-21 20:31:39,434 INFO L495 AbstractCegarLoop]: Abstraction has has 151 places, 200 transitions, 2118 flow [2024-06-21 20:31:39,434 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 20:31:39,434 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:31:39,434 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:31:39,434 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-21 20:31:39,434 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 20:31:39,434 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:31:39,434 INFO L85 PathProgramCache]: Analyzing trace with hash 263552384, now seen corresponding path program 8 times [2024-06-21 20:31:39,435 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:31:39,435 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1481811552] [2024-06-21 20:31:39,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:31:39,435 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:31:39,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:31:40,331 INFO 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 20:31:40,331 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:31:40,331 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1481811552] [2024-06-21 20:31:40,331 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1481811552] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:31:40,331 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:31:40,331 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:31:40,331 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1521398032] [2024-06-21 20:31:40,331 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:31:40,331 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:31:40,331 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:31:40,332 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:31:40,332 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:31:40,424 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-21 20:31:40,424 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 151 places, 200 transitions, 2118 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 20:31:40,424 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:31:40,425 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-21 20:31:40,425 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:31:41,503 INFO L124 PetriNetUnfolderBase]: 2706/4109 cut-off events. [2024-06-21 20:31:41,504 INFO L125 PetriNetUnfolderBase]: For 248822/248825 co-relation queries the response was YES. [2024-06-21 20:31:41,522 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29779 conditions, 4109 events. 2706/4109 cut-off events. For 248822/248825 co-relation queries the response was YES. Maximal size of possible extension queue 146. Compared 21045 event pairs, 721 based on Foata normal form. 6/4102 useless extension candidates. Maximal degree in co-relation 29714. Up to 3306 conditions per place. [2024-06-21 20:31:41,539 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 122 selfloop transitions, 107 changer transitions 0/234 dead transitions. [2024-06-21 20:31:41,539 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 159 places, 234 transitions, 2838 flow [2024-06-21 20:31:41,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:31:41,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:31:41,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 181 transitions. [2024-06-21 20:31:41,540 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45707070707070707 [2024-06-21 20:31:41,541 INFO L175 Difference]: Start difference. First operand has 151 places, 200 transitions, 2118 flow. Second operand 9 states and 181 transitions. [2024-06-21 20:31:41,541 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 159 places, 234 transitions, 2838 flow [2024-06-21 20:31:41,730 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 153 places, 234 transitions, 2594 flow, removed 26 selfloop flow, removed 6 redundant places. [2024-06-21 20:31:41,733 INFO L231 Difference]: Finished difference. Result has 154 places, 200 transitions, 2096 flow [2024-06-21 20:31:41,733 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1874, PETRI_DIFFERENCE_MINUEND_PLACES=145, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=200, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=107, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2096, PETRI_PLACES=154, PETRI_TRANSITIONS=200} [2024-06-21 20:31:41,734 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 109 predicate places. [2024-06-21 20:31:41,734 INFO L495 AbstractCegarLoop]: Abstraction has has 154 places, 200 transitions, 2096 flow [2024-06-21 20:31:41,734 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 20:31:41,734 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:31:41,734 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:31:41,734 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-21 20:31:41,734 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 20:31:41,735 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:31:41,735 INFO L85 PathProgramCache]: Analyzing trace with hash 255271478, now seen corresponding path program 5 times [2024-06-21 20:31:41,735 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:31:41,735 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1821717950] [2024-06-21 20:31:41,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:31:41,735 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:31:41,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:31:42,660 INFO 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 20:31:42,661 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:31:42,662 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1821717950] [2024-06-21 20:31:42,662 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1821717950] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:31:42,663 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:31:42,663 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:31:42,663 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [780201511] [2024-06-21 20:31:42,663 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:31:42,663 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:31:42,663 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:31:42,663 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:31:42,664 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:31:42,750 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-21 20:31:42,750 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 154 places, 200 transitions, 2096 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 20:31:42,750 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:31:42,750 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-21 20:31:42,750 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:31:43,718 INFO L124 PetriNetUnfolderBase]: 2701/4095 cut-off events. [2024-06-21 20:31:43,718 INFO L125 PetriNetUnfolderBase]: For 256258/256258 co-relation queries the response was YES. [2024-06-21 20:31:43,735 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29921 conditions, 4095 events. 2701/4095 cut-off events. For 256258/256258 co-relation queries the response was YES. Maximal size of possible extension queue 145. Compared 20805 event pairs, 780 based on Foata normal form. 2/4082 useless extension candidates. Maximal degree in co-relation 29855. Up to 3674 conditions per place. [2024-06-21 20:31:43,750 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 148 selfloop transitions, 75 changer transitions 0/228 dead transitions. [2024-06-21 20:31:43,750 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 162 places, 228 transitions, 2634 flow [2024-06-21 20:31:43,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:31:43,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:31:43,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 174 transitions. [2024-06-21 20:31:43,751 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4393939393939394 [2024-06-21 20:31:43,751 INFO L175 Difference]: Start difference. First operand has 154 places, 200 transitions, 2096 flow. Second operand 9 states and 174 transitions. [2024-06-21 20:31:43,751 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 162 places, 228 transitions, 2634 flow [2024-06-21 20:31:43,935 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 154 places, 228 transitions, 2373 flow, removed 14 selfloop flow, removed 8 redundant places. [2024-06-21 20:31:43,938 INFO L231 Difference]: Finished difference. Result has 155 places, 200 transitions, 1993 flow [2024-06-21 20:31:43,938 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1835, PETRI_DIFFERENCE_MINUEND_PLACES=146, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=200, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=125, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1993, PETRI_PLACES=155, PETRI_TRANSITIONS=200} [2024-06-21 20:31:43,938 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 110 predicate places. [2024-06-21 20:31:43,939 INFO L495 AbstractCegarLoop]: Abstraction has has 155 places, 200 transitions, 1993 flow [2024-06-21 20:31:43,939 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 20:31:43,939 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:31:43,939 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:31:43,939 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-21 20:31:43,939 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 20:31:43,939 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:31:43,939 INFO L85 PathProgramCache]: Analyzing trace with hash 255271664, now seen corresponding path program 9 times [2024-06-21 20:31:43,939 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:31:43,939 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [34498317] [2024-06-21 20:31:43,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:31:43,940 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:31:43,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:31:44,847 INFO 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 20:31:44,847 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:31:44,847 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [34498317] [2024-06-21 20:31:44,847 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [34498317] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:31:44,847 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:31:44,847 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:31:44,847 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [832023439] [2024-06-21 20:31:44,847 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:31:44,847 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:31:44,848 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:31:44,848 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:31:44,848 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:31:44,940 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-21 20:31:44,940 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 155 places, 200 transitions, 1993 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 20:31:44,940 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:31:44,940 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-21 20:31:44,940 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:31:45,960 INFO L124 PetriNetUnfolderBase]: 2723/4134 cut-off events. [2024-06-21 20:31:45,960 INFO L125 PetriNetUnfolderBase]: For 269300/269303 co-relation queries the response was YES. [2024-06-21 20:31:45,977 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30091 conditions, 4134 events. 2723/4134 cut-off events. For 269300/269303 co-relation queries the response was YES. Maximal size of possible extension queue 148. Compared 21173 event pairs, 707 based on Foata normal form. 6/4127 useless extension candidates. Maximal degree in co-relation 30024. Up to 3318 conditions per place. [2024-06-21 20:31:45,991 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 133 selfloop transitions, 102 changer transitions 0/240 dead transitions. [2024-06-21 20:31:45,991 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 163 places, 240 transitions, 2787 flow [2024-06-21 20:31:45,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:31:45,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:31:45,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 183 transitions. [2024-06-21 20:31:45,992 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4621212121212121 [2024-06-21 20:31:45,993 INFO L175 Difference]: Start difference. First operand has 155 places, 200 transitions, 1993 flow. Second operand 9 states and 183 transitions. [2024-06-21 20:31:45,993 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 163 places, 240 transitions, 2787 flow [2024-06-21 20:31:46,184 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 153 places, 240 transitions, 2533 flow, removed 4 selfloop flow, removed 10 redundant places. [2024-06-21 20:31:46,187 INFO L231 Difference]: Finished difference. Result has 154 places, 203 transitions, 1989 flow [2024-06-21 20:31:46,187 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1739, PETRI_DIFFERENCE_MINUEND_PLACES=145, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=200, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=99, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=101, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1989, PETRI_PLACES=154, PETRI_TRANSITIONS=203} [2024-06-21 20:31:46,187 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 109 predicate places. [2024-06-21 20:31:46,187 INFO L495 AbstractCegarLoop]: Abstraction has has 154 places, 203 transitions, 1989 flow [2024-06-21 20:31:46,187 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 20:31:46,187 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:31:46,187 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:31:46,188 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-21 20:31:46,188 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 20:31:46,188 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:31:46,188 INFO L85 PathProgramCache]: Analyzing trace with hash 1258953146, now seen corresponding path program 10 times [2024-06-21 20:31:46,188 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:31:46,189 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1378728031] [2024-06-21 20:31:46,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:31:46,189 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:31:46,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:31:47,124 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:31:47,125 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:31:47,125 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1378728031] [2024-06-21 20:31:47,125 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1378728031] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:31:47,125 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:31:47,125 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:31:47,125 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1581483411] [2024-06-21 20:31:47,125 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:31:47,125 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:31:47,125 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:31:47,125 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:31:47,126 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:31:47,226 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-21 20:31:47,227 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 154 places, 203 transitions, 1989 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 20:31:47,227 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:31:47,227 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-21 20:31:47,227 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:31:48,240 INFO L124 PetriNetUnfolderBase]: 2713/4120 cut-off events. [2024-06-21 20:31:48,241 INFO L125 PetriNetUnfolderBase]: For 277503/277506 co-relation queries the response was YES. [2024-06-21 20:31:48,258 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30277 conditions, 4120 events. 2713/4120 cut-off events. For 277503/277506 co-relation queries the response was YES. Maximal size of possible extension queue 148. Compared 21035 event pairs, 707 based on Foata normal form. 6/4113 useless extension candidates. Maximal degree in co-relation 30209. Up to 3310 conditions per place. [2024-06-21 20:31:48,274 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 133 selfloop transitions, 100 changer transitions 0/238 dead transitions. [2024-06-21 20:31:48,274 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 162 places, 238 transitions, 2575 flow [2024-06-21 20:31:48,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:31:48,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:31:48,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 182 transitions. [2024-06-21 20:31:48,275 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4595959595959596 [2024-06-21 20:31:48,276 INFO L175 Difference]: Start difference. First operand has 154 places, 203 transitions, 1989 flow. Second operand 9 states and 182 transitions. [2024-06-21 20:31:48,276 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 162 places, 238 transitions, 2575 flow [2024-06-21 20:31:48,462 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 154 places, 238 transitions, 2241 flow, removed 20 selfloop flow, removed 8 redundant places. [2024-06-21 20:31:48,465 INFO L231 Difference]: Finished difference. Result has 155 places, 203 transitions, 1863 flow [2024-06-21 20:31:48,465 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1655, PETRI_DIFFERENCE_MINUEND_PLACES=146, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=203, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=100, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=103, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1863, PETRI_PLACES=155, PETRI_TRANSITIONS=203} [2024-06-21 20:31:48,466 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 110 predicate places. [2024-06-21 20:31:48,466 INFO L495 AbstractCegarLoop]: Abstraction has has 155 places, 203 transitions, 1863 flow [2024-06-21 20:31:48,466 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 20:31:48,466 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:31:48,466 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:31:48,466 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-21 20:31:48,466 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 20:31:48,467 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:31:48,467 INFO L85 PathProgramCache]: Analyzing trace with hash 533749184, now seen corresponding path program 2 times [2024-06-21 20:31:48,467 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:31:48,467 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1947810825] [2024-06-21 20:31:48,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:31:48,467 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:31:48,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:31:49,271 INFO 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 20:31:49,271 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:31:49,271 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1947810825] [2024-06-21 20:31:49,271 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1947810825] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:31:49,271 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:31:49,271 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 20:31:49,271 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [424073168] [2024-06-21 20:31:49,271 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:31:49,271 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 20:31:49,272 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:31:49,272 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 20:31:49,272 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-21 20:31:49,337 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 44 [2024-06-21 20:31:49,338 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 155 places, 203 transitions, 1863 flow. Second operand has 7 states, 7 states have (on average 14.857142857142858) internal successors, (104), 7 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:31:49,338 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:31:49,338 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 44 [2024-06-21 20:31:49,338 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:31:49,907 INFO L124 PetriNetUnfolderBase]: 2207/3589 cut-off events. [2024-06-21 20:31:49,907 INFO L125 PetriNetUnfolderBase]: For 282852/282867 co-relation queries the response was YES. [2024-06-21 20:31:49,923 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27423 conditions, 3589 events. 2207/3589 cut-off events. For 282852/282867 co-relation queries the response was YES. Maximal size of possible extension queue 144. Compared 20159 event pairs, 711 based on Foata normal form. 11/3586 useless extension candidates. Maximal degree in co-relation 27354. Up to 3051 conditions per place. [2024-06-21 20:31:49,936 INFO L140 encePairwiseOnDemand]: 36/44 looper letters, 135 selfloop transitions, 18 changer transitions 0/217 dead transitions. [2024-06-21 20:31:49,936 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 160 places, 217 transitions, 2241 flow [2024-06-21 20:31:49,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 20:31:49,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 20:31:49,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 125 transitions. [2024-06-21 20:31:49,937 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4734848484848485 [2024-06-21 20:31:49,937 INFO L175 Difference]: Start difference. First operand has 155 places, 203 transitions, 1863 flow. Second operand 6 states and 125 transitions. [2024-06-21 20:31:49,937 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 160 places, 217 transitions, 2241 flow [2024-06-21 20:31:50,111 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 151 places, 217 transitions, 2010 flow, removed 0 selfloop flow, removed 9 redundant places. [2024-06-21 20:31:50,113 INFO L231 Difference]: Finished difference. Result has 152 places, 206 transitions, 1714 flow [2024-06-21 20:31:50,113 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1632, PETRI_DIFFERENCE_MINUEND_PLACES=146, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=203, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=185, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1714, PETRI_PLACES=152, PETRI_TRANSITIONS=206} [2024-06-21 20:31:50,114 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 107 predicate places. [2024-06-21 20:31:50,114 INFO L495 AbstractCegarLoop]: Abstraction has has 152 places, 206 transitions, 1714 flow [2024-06-21 20:31:50,114 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.857142857142858) internal successors, (104), 7 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:31:50,114 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:31:50,114 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:31:50,114 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-21 20:31:50,114 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:31:50,114 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:31:50,114 INFO L85 PathProgramCache]: Analyzing trace with hash 1486869152, now seen corresponding path program 1 times [2024-06-21 20:31:50,114 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:31:50,114 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1643476865] [2024-06-21 20:31:50,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:31:50,115 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:31:50,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:31:50,929 INFO 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 20:31:50,929 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:31:50,929 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1643476865] [2024-06-21 20:31:50,929 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1643476865] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:31:50,930 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:31:50,930 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:31:50,930 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [530802807] [2024-06-21 20:31:50,930 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:31:50,930 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:31:50,930 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:31:50,930 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:31:50,930 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:31:51,009 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-21 20:31:51,009 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 152 places, 206 transitions, 1714 flow. Second operand has 8 states, 8 states have (on average 13.625) internal successors, (109), 8 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:31:51,009 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:31:51,009 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-21 20:31:51,009 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:31:51,650 INFO L124 PetriNetUnfolderBase]: 2260/3613 cut-off events. [2024-06-21 20:31:51,650 INFO L125 PetriNetUnfolderBase]: For 258782/258794 co-relation queries the response was YES. [2024-06-21 20:31:51,667 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26322 conditions, 3613 events. 2260/3613 cut-off events. For 258782/258794 co-relation queries the response was YES. Maximal size of possible extension queue 139. Compared 19699 event pairs, 995 based on Foata normal form. 13/3589 useless extension candidates. Maximal degree in co-relation 26252. Up to 3275 conditions per place. [2024-06-21 20:31:51,681 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 184 selfloop transitions, 13 changer transitions 0/222 dead transitions. [2024-06-21 20:31:51,681 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 158 places, 222 transitions, 2188 flow [2024-06-21 20:31:51,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:31:51,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:31:51,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 134 transitions. [2024-06-21 20:31:51,682 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43506493506493504 [2024-06-21 20:31:51,683 INFO L175 Difference]: Start difference. First operand has 152 places, 206 transitions, 1714 flow. Second operand 7 states and 134 transitions. [2024-06-21 20:31:51,683 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 158 places, 222 transitions, 2188 flow [2024-06-21 20:31:51,900 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 154 places, 222 transitions, 2128 flow, removed 14 selfloop flow, removed 4 redundant places. [2024-06-21 20:31:51,902 INFO L231 Difference]: Finished difference. Result has 156 places, 211 transitions, 1745 flow [2024-06-21 20:31:51,902 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1654, PETRI_DIFFERENCE_MINUEND_PLACES=148, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=206, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=194, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1745, PETRI_PLACES=156, PETRI_TRANSITIONS=211} [2024-06-21 20:31:51,903 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 111 predicate places. [2024-06-21 20:31:51,903 INFO L495 AbstractCegarLoop]: Abstraction has has 156 places, 211 transitions, 1745 flow [2024-06-21 20:31:51,903 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.625) internal successors, (109), 8 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:31:51,903 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:31:51,903 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:31:51,903 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-21 20:31:51,903 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:31:51,903 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:31:51,903 INFO L85 PathProgramCache]: Analyzing trace with hash 1487048642, now seen corresponding path program 2 times [2024-06-21 20:31:51,903 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:31:51,903 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1538854453] [2024-06-21 20:31:51,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:31:51,904 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:31:51,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:31:52,858 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:31:52,858 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:31:52,859 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1538854453] [2024-06-21 20:31:52,859 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1538854453] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:31:52,859 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:31:52,859 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:31:52,859 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1377798542] [2024-06-21 20:31:52,859 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:31:52,859 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:31:52,859 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:31:52,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:31:52,859 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:31:52,928 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-21 20:31:52,929 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 156 places, 211 transitions, 1745 flow. Second operand has 8 states, 8 states have (on average 13.625) internal successors, (109), 8 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:31:52,929 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:31:52,929 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-21 20:31:52,929 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:31:53,484 INFO L124 PetriNetUnfolderBase]: 2276/3620 cut-off events. [2024-06-21 20:31:53,484 INFO L125 PetriNetUnfolderBase]: For 269487/269510 co-relation queries the response was YES. [2024-06-21 20:31:53,503 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26862 conditions, 3620 events. 2276/3620 cut-off events. For 269487/269510 co-relation queries the response was YES. Maximal size of possible extension queue 138. Compared 19661 event pairs, 999 based on Foata normal form. 23/3601 useless extension candidates. Maximal degree in co-relation 26790. Up to 3282 conditions per place. [2024-06-21 20:31:53,518 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 179 selfloop transitions, 18 changer transitions 0/222 dead transitions. [2024-06-21 20:31:53,518 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 162 places, 222 transitions, 2203 flow [2024-06-21 20:31:53,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:31:53,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:31:53,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 133 transitions. [2024-06-21 20:31:53,519 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4318181818181818 [2024-06-21 20:31:53,519 INFO L175 Difference]: Start difference. First operand has 156 places, 211 transitions, 1745 flow. Second operand 7 states and 133 transitions. [2024-06-21 20:31:53,519 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 162 places, 222 transitions, 2203 flow [2024-06-21 20:31:53,758 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 158 places, 222 transitions, 2151 flow, removed 16 selfloop flow, removed 4 redundant places. [2024-06-21 20:31:53,760 INFO L231 Difference]: Finished difference. Result has 159 places, 214 transitions, 1783 flow [2024-06-21 20:31:53,760 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1693, PETRI_DIFFERENCE_MINUEND_PLACES=152, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=211, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=193, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1783, PETRI_PLACES=159, PETRI_TRANSITIONS=214} [2024-06-21 20:31:53,761 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 114 predicate places. [2024-06-21 20:31:53,761 INFO L495 AbstractCegarLoop]: Abstraction has has 159 places, 214 transitions, 1783 flow [2024-06-21 20:31:53,761 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.625) internal successors, (109), 8 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:31:53,761 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:31:53,761 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:31:53,761 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-21 20:31:53,761 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 20:31:53,761 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:31:53,761 INFO L85 PathProgramCache]: Analyzing trace with hash -1382758770, now seen corresponding path program 1 times [2024-06-21 20:31:53,762 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:31:53,762 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [544120873] [2024-06-21 20:31:53,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:31:53,762 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:31:53,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:31:54,679 INFO 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 20:31:54,680 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:31:54,680 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [544120873] [2024-06-21 20:31:54,680 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [544120873] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:31:54,680 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:31:54,680 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 20:31:54,680 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [282999107] [2024-06-21 20:31:54,680 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:31:54,680 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 20:31:54,680 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:31:54,680 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 20:31:54,680 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2024-06-21 20:31:54,789 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-21 20:31:54,789 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 159 places, 214 transitions, 1783 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 20:31:54,789 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:31:54,789 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-21 20:31:54,789 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:31:55,728 INFO L124 PetriNetUnfolderBase]: 2800/4262 cut-off events. [2024-06-21 20:31:55,729 INFO L125 PetriNetUnfolderBase]: For 322105/322111 co-relation queries the response was YES. [2024-06-21 20:31:55,748 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32230 conditions, 4262 events. 2800/4262 cut-off events. For 322105/322111 co-relation queries the response was YES. Maximal size of possible extension queue 151. Compared 21961 event pairs, 1063 based on Foata normal form. 10/4270 useless extension candidates. Maximal degree in co-relation 32157. Up to 3963 conditions per place. [2024-06-21 20:31:55,764 INFO L140 encePairwiseOnDemand]: 29/44 looper letters, 230 selfloop transitions, 47 changer transitions 0/282 dead transitions. [2024-06-21 20:31:55,764 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 169 places, 282 transitions, 2670 flow [2024-06-21 20:31:55,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 20:31:55,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 20:31:55,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 214 transitions. [2024-06-21 20:31:55,774 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44214876033057854 [2024-06-21 20:31:55,774 INFO L175 Difference]: Start difference. First operand has 159 places, 214 transitions, 1783 flow. Second operand 11 states and 214 transitions. [2024-06-21 20:31:55,774 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 169 places, 282 transitions, 2670 flow [2024-06-21 20:31:56,155 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 164 places, 282 transitions, 2602 flow, removed 18 selfloop flow, removed 5 redundant places. [2024-06-21 20:31:56,158 INFO L231 Difference]: Finished difference. Result has 169 places, 239 transitions, 2075 flow [2024-06-21 20:31:56,158 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1715, PETRI_DIFFERENCE_MINUEND_PLACES=154, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=214, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=180, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2075, PETRI_PLACES=169, PETRI_TRANSITIONS=239} [2024-06-21 20:31:56,158 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 124 predicate places. [2024-06-21 20:31:56,159 INFO L495 AbstractCegarLoop]: Abstraction has has 169 places, 239 transitions, 2075 flow [2024-06-21 20:31:56,159 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 20:31:56,159 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:31:56,159 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:31:56,159 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-21 20:31:56,159 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 20:31:56,160 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:31:56,160 INFO L85 PathProgramCache]: Analyzing trace with hash 482668204, now seen corresponding path program 2 times [2024-06-21 20:31:56,160 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:31:56,160 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1652031682] [2024-06-21 20:31:56,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:31:56,160 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:31:56,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:31:56,987 INFO 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 20:31:56,987 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:31:56,988 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1652031682] [2024-06-21 20:31:56,988 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1652031682] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:31:56,988 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:31:56,988 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 20:31:56,988 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [445349262] [2024-06-21 20:31:56,988 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:31:56,988 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 20:31:56,988 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:31:56,989 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 20:31:56,989 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2024-06-21 20:31:57,137 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-21 20:31:57,138 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 169 places, 239 transitions, 2075 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 20:31:57,138 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:31:57,138 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-21 20:31:57,138 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:31:58,233 INFO L124 PetriNetUnfolderBase]: 2953/4509 cut-off events. [2024-06-21 20:31:58,234 INFO L125 PetriNetUnfolderBase]: For 348311/348319 co-relation queries the response was YES. [2024-06-21 20:31:58,258 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34970 conditions, 4509 events. 2953/4509 cut-off events. For 348311/348319 co-relation queries the response was YES. Maximal size of possible extension queue 168. Compared 23697 event pairs, 1035 based on Foata normal form. 12/4519 useless extension candidates. Maximal degree in co-relation 34892. Up to 4069 conditions per place. [2024-06-21 20:31:58,277 INFO L140 encePairwiseOnDemand]: 29/44 looper letters, 244 selfloop transitions, 82 changer transitions 0/331 dead transitions. [2024-06-21 20:31:58,277 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 181 places, 331 transitions, 3661 flow [2024-06-21 20:31:58,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-21 20:31:58,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-21 20:31:58,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 253 transitions. [2024-06-21 20:31:58,278 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4423076923076923 [2024-06-21 20:31:58,278 INFO L175 Difference]: Start difference. First operand has 169 places, 239 transitions, 2075 flow. Second operand 13 states and 253 transitions. [2024-06-21 20:31:58,279 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 181 places, 331 transitions, 3661 flow [2024-06-21 20:31:58,605 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 177 places, 331 transitions, 3457 flow, removed 71 selfloop flow, removed 4 redundant places. [2024-06-21 20:31:58,608 INFO L231 Difference]: Finished difference. Result has 181 places, 274 transitions, 2555 flow [2024-06-21 20:31:58,608 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1980, PETRI_DIFFERENCE_MINUEND_PLACES=165, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=239, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=184, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=2555, PETRI_PLACES=181, PETRI_TRANSITIONS=274} [2024-06-21 20:31:58,609 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 136 predicate places. [2024-06-21 20:31:58,609 INFO L495 AbstractCegarLoop]: Abstraction has has 181 places, 274 transitions, 2555 flow [2024-06-21 20:31:58,609 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 20:31:58,609 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:31:58,609 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:31:58,609 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-21 20:31:58,609 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 20:31:58,609 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:31:58,609 INFO L85 PathProgramCache]: Analyzing trace with hash -1311347366, now seen corresponding path program 3 times [2024-06-21 20:31:58,609 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:31:58,609 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1289247025] [2024-06-21 20:31:58,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:31:58,609 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:31:58,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:31:59,460 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:31:59,461 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:31:59,461 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1289247025] [2024-06-21 20:31:59,461 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1289247025] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:31:59,461 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:31:59,461 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 20:31:59,461 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1893356016] [2024-06-21 20:31:59,461 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:31:59,461 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 20:31:59,461 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:31:59,461 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 20:31:59,461 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2024-06-21 20:31:59,577 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-21 20:31:59,578 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 181 places, 274 transitions, 2555 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 20:31:59,578 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:31:59,578 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-21 20:31:59,578 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:32:00,547 INFO L124 PetriNetUnfolderBase]: 3070/4698 cut-off events. [2024-06-21 20:32:00,547 INFO L125 PetriNetUnfolderBase]: For 367858/367866 co-relation queries the response was YES. [2024-06-21 20:32:00,574 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36983 conditions, 4698 events. 3070/4698 cut-off events. For 367858/367866 co-relation queries the response was YES. Maximal size of possible extension queue 184. Compared 24990 event pairs, 1086 based on Foata normal form. 14/4710 useless extension candidates. Maximal degree in co-relation 36901. Up to 4293 conditions per place. [2024-06-21 20:32:00,596 INFO L140 encePairwiseOnDemand]: 29/44 looper letters, 264 selfloop transitions, 83 changer transitions 0/352 dead transitions. [2024-06-21 20:32:00,596 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 191 places, 352 transitions, 3880 flow [2024-06-21 20:32:00,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 20:32:00,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 20:32:00,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 214 transitions. [2024-06-21 20:32:00,597 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44214876033057854 [2024-06-21 20:32:00,597 INFO L175 Difference]: Start difference. First operand has 181 places, 274 transitions, 2555 flow. Second operand 11 states and 214 transitions. [2024-06-21 20:32:00,597 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 191 places, 352 transitions, 3880 flow [2024-06-21 20:32:00,936 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 185 places, 352 transitions, 3627 flow, removed 92 selfloop flow, removed 6 redundant places. [2024-06-21 20:32:00,940 INFO L231 Difference]: Finished difference. Result has 189 places, 310 transitions, 3068 flow [2024-06-21 20:32:00,941 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2406, PETRI_DIFFERENCE_MINUEND_PLACES=175, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=274, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=199, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3068, PETRI_PLACES=189, PETRI_TRANSITIONS=310} [2024-06-21 20:32:00,941 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 144 predicate places. [2024-06-21 20:32:00,941 INFO L495 AbstractCegarLoop]: Abstraction has has 189 places, 310 transitions, 3068 flow [2024-06-21 20:32:00,941 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 20:32:00,941 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:32:00,941 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:32:00,941 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-21 20:32:00,941 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 20:32:00,942 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:32:00,942 INFO L85 PathProgramCache]: Analyzing trace with hash 1478727748, now seen corresponding path program 4 times [2024-06-21 20:32:00,942 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:32:00,942 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [439282568] [2024-06-21 20:32:00,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:32:00,942 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:32:00,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:32:01,753 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:32:01,754 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:32:01,754 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [439282568] [2024-06-21 20:32:01,754 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [439282568] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:32:01,754 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:32:01,754 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 20:32:01,754 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1479802445] [2024-06-21 20:32:01,754 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:32:01,754 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 20:32:01,754 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:32:01,754 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 20:32:01,755 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2024-06-21 20:32:01,877 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-21 20:32:01,878 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 189 places, 310 transitions, 3068 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 20:32:01,878 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:32:01,878 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-21 20:32:01,878 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:32:03,053 INFO L124 PetriNetUnfolderBase]: 3384/5191 cut-off events. [2024-06-21 20:32:03,053 INFO L125 PetriNetUnfolderBase]: For 388920/388927 co-relation queries the response was YES. [2024-06-21 20:32:03,081 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40029 conditions, 5191 events. 3384/5191 cut-off events. For 388920/388927 co-relation queries the response was YES. Maximal size of possible extension queue 234. Compared 28360 event pairs, 869 based on Foata normal form. 8/5196 useless extension candidates. Maximal degree in co-relation 39942. Up to 3550 conditions per place. [2024-06-21 20:32:03,102 INFO L140 encePairwiseOnDemand]: 29/44 looper letters, 193 selfloop transitions, 244 changer transitions 0/442 dead transitions. [2024-06-21 20:32:03,103 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 199 places, 442 transitions, 5292 flow [2024-06-21 20:32:03,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 20:32:03,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 20:32:03,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 238 transitions. [2024-06-21 20:32:03,104 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49173553719008267 [2024-06-21 20:32:03,104 INFO L175 Difference]: Start difference. First operand has 189 places, 310 transitions, 3068 flow. Second operand 11 states and 238 transitions. [2024-06-21 20:32:03,104 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 199 places, 442 transitions, 5292 flow [2024-06-21 20:32:03,446 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 194 places, 442 transitions, 5140 flow, removed 32 selfloop flow, removed 5 redundant places. [2024-06-21 20:32:03,451 INFO L231 Difference]: Finished difference. Result has 198 places, 364 transitions, 4042 flow [2024-06-21 20:32:03,451 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2916, PETRI_DIFFERENCE_MINUEND_PLACES=184, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=310, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=193, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=112, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=4042, PETRI_PLACES=198, PETRI_TRANSITIONS=364} [2024-06-21 20:32:03,451 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 153 predicate places. [2024-06-21 20:32:03,452 INFO L495 AbstractCegarLoop]: Abstraction has has 198 places, 364 transitions, 4042 flow [2024-06-21 20:32:03,452 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 20:32:03,452 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:32:03,452 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:32:03,452 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-21 20:32:03,452 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 20:32:03,452 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:32:03,453 INFO L85 PathProgramCache]: Analyzing trace with hash 76470958, now seen corresponding path program 5 times [2024-06-21 20:32:03,453 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:32:03,453 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1309167580] [2024-06-21 20:32:03,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:32:03,453 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:32:03,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:32:04,263 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:32:04,263 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:32:04,263 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1309167580] [2024-06-21 20:32:04,263 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1309167580] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:32:04,263 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:32:04,263 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 20:32:04,263 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1026895243] [2024-06-21 20:32:04,263 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:32:04,264 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 20:32:04,264 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:32:04,272 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 20:32:04,272 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2024-06-21 20:32:04,396 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-21 20:32:04,396 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 198 places, 364 transitions, 4042 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 20:32:04,396 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:32:04,396 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-21 20:32:04,396 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:32:05,546 INFO L124 PetriNetUnfolderBase]: 3374/5178 cut-off events. [2024-06-21 20:32:05,546 INFO L125 PetriNetUnfolderBase]: For 403652/403659 co-relation queries the response was YES. [2024-06-21 20:32:05,575 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41586 conditions, 5178 events. 3374/5178 cut-off events. For 403652/403659 co-relation queries the response was YES. Maximal size of possible extension queue 232. Compared 28347 event pairs, 863 based on Foata normal form. 8/5183 useless extension candidates. Maximal degree in co-relation 41495. Up to 3542 conditions per place. [2024-06-21 20:32:05,597 INFO L140 encePairwiseOnDemand]: 29/44 looper letters, 186 selfloop transitions, 249 changer transitions 0/440 dead transitions. [2024-06-21 20:32:05,597 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 208 places, 440 transitions, 5613 flow [2024-06-21 20:32:05,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 20:32:05,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 20:32:05,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 234 transitions. [2024-06-21 20:32:05,598 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4834710743801653 [2024-06-21 20:32:05,598 INFO L175 Difference]: Start difference. First operand has 198 places, 364 transitions, 4042 flow. Second operand 11 states and 234 transitions. [2024-06-21 20:32:05,598 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 208 places, 440 transitions, 5613 flow [2024-06-21 20:32:06,120 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 204 places, 440 transitions, 5377 flow, removed 72 selfloop flow, removed 4 redundant places. [2024-06-21 20:32:06,125 INFO L231 Difference]: Finished difference. Result has 206 places, 365 transitions, 4351 flow [2024-06-21 20:32:06,125 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3806, PETRI_DIFFERENCE_MINUEND_PLACES=194, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=364, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=248, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=115, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=4351, PETRI_PLACES=206, PETRI_TRANSITIONS=365} [2024-06-21 20:32:06,125 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 161 predicate places. [2024-06-21 20:32:06,125 INFO L495 AbstractCegarLoop]: Abstraction has has 206 places, 365 transitions, 4351 flow [2024-06-21 20:32:06,126 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 20:32:06,126 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:32:06,126 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:32:06,126 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-21 20:32:06,126 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 20:32:06,126 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:32:06,126 INFO L85 PathProgramCache]: Analyzing trace with hash -180032754, now seen corresponding path program 6 times [2024-06-21 20:32:06,126 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:32:06,126 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1603238428] [2024-06-21 20:32:06,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:32:06,126 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:32:06,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:32:06,999 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:32:06,999 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:32:06,999 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1603238428] [2024-06-21 20:32:06,999 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1603238428] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:32:06,999 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:32:06,999 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 20:32:06,999 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [232263181] [2024-06-21 20:32:06,999 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:32:07,000 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 20:32:07,000 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:32:07,000 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 20:32:07,000 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2024-06-21 20:32:07,122 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-21 20:32:07,122 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 206 places, 365 transitions, 4351 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 20:32:07,122 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:32:07,122 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-21 20:32:07,123 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:32:08,483 INFO L124 PetriNetUnfolderBase]: 3982/6177 cut-off events. [2024-06-21 20:32:08,484 INFO L125 PetriNetUnfolderBase]: For 441351/441358 co-relation queries the response was YES. [2024-06-21 20:32:08,521 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48215 conditions, 6177 events. 3982/6177 cut-off events. For 441351/441358 co-relation queries the response was YES. Maximal size of possible extension queue 328. Compared 35647 event pairs, 1010 based on Foata normal form. 10/6184 useless extension candidates. Maximal degree in co-relation 48121. Up to 3895 conditions per place. [2024-06-21 20:32:08,547 INFO L140 encePairwiseOnDemand]: 29/44 looper letters, 233 selfloop transitions, 329 changer transitions 0/567 dead transitions. [2024-06-21 20:32:08,547 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 216 places, 567 transitions, 7961 flow [2024-06-21 20:32:08,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 20:32:08,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 20:32:08,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 241 transitions. [2024-06-21 20:32:08,548 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49793388429752067 [2024-06-21 20:32:08,548 INFO L175 Difference]: Start difference. First operand has 206 places, 365 transitions, 4351 flow. Second operand 11 states and 241 transitions. [2024-06-21 20:32:08,548 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 216 places, 567 transitions, 7961 flow [2024-06-21 20:32:09,320 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 210 places, 567 transitions, 7462 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-06-21 20:32:09,326 INFO L231 Difference]: Finished difference. Result has 215 places, 470 transitions, 6099 flow [2024-06-21 20:32:09,326 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3991, PETRI_DIFFERENCE_MINUEND_PLACES=200, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=365, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=224, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=123, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=6099, PETRI_PLACES=215, PETRI_TRANSITIONS=470} [2024-06-21 20:32:09,326 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 170 predicate places. [2024-06-21 20:32:09,326 INFO L495 AbstractCegarLoop]: Abstraction has has 215 places, 470 transitions, 6099 flow [2024-06-21 20:32:09,327 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 20:32:09,327 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:32:09,327 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:32:09,327 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-06-21 20:32:09,327 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 20:32:09,327 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:32:09,327 INFO L85 PathProgramCache]: Analyzing trace with hash 1369695658, now seen corresponding path program 7 times [2024-06-21 20:32:09,327 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:32:09,327 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [810197897] [2024-06-21 20:32:09,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:32:09,327 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:32:09,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:32:10,194 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:32:10,194 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:32:10,194 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [810197897] [2024-06-21 20:32:10,194 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [810197897] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:32:10,194 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:32:10,194 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 20:32:10,194 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [381321424] [2024-06-21 20:32:10,194 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:32:10,194 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 20:32:10,195 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:32:10,195 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 20:32:10,195 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2024-06-21 20:32:10,290 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-21 20:32:10,290 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 215 places, 470 transitions, 6099 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 20:32:10,290 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:32:10,290 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-21 20:32:10,291 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:32:11,738 INFO L124 PetriNetUnfolderBase]: 3966/6154 cut-off events. [2024-06-21 20:32:11,738 INFO L125 PetriNetUnfolderBase]: For 453163/453170 co-relation queries the response was YES. [2024-06-21 20:32:11,779 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49355 conditions, 6154 events. 3966/6154 cut-off events. For 453163/453170 co-relation queries the response was YES. Maximal size of possible extension queue 326. Compared 35456 event pairs, 1001 based on Foata normal form. 10/6161 useless extension candidates. Maximal degree in co-relation 49256. Up to 3882 conditions per place. [2024-06-21 20:32:11,808 INFO L140 encePairwiseOnDemand]: 29/44 looper letters, 228 selfloop transitions, 332 changer transitions 0/565 dead transitions. [2024-06-21 20:32:11,808 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 225 places, 565 transitions, 8265 flow [2024-06-21 20:32:11,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 20:32:11,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 20:32:11,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 237 transitions. [2024-06-21 20:32:11,809 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4896694214876033 [2024-06-21 20:32:11,809 INFO L175 Difference]: Start difference. First operand has 215 places, 470 transitions, 6099 flow. Second operand 11 states and 237 transitions. [2024-06-21 20:32:11,809 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 225 places, 565 transitions, 8265 flow [2024-06-21 20:32:12,604 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 221 places, 565 transitions, 7771 flow, removed 88 selfloop flow, removed 4 redundant places. [2024-06-21 20:32:12,611 INFO L231 Difference]: Finished difference. Result has 223 places, 472 transitions, 6338 flow [2024-06-21 20:32:12,611 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=5605, PETRI_DIFFERENCE_MINUEND_PLACES=211, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=470, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=330, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=138, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=6338, PETRI_PLACES=223, PETRI_TRANSITIONS=472} [2024-06-21 20:32:12,611 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 178 predicate places. [2024-06-21 20:32:12,611 INFO L495 AbstractCegarLoop]: Abstraction has has 223 places, 472 transitions, 6338 flow [2024-06-21 20:32:12,612 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 20:32:12,612 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:32:12,612 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:32:12,612 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-06-21 20:32:12,612 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 20:32:12,612 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:32:12,612 INFO L85 PathProgramCache]: Analyzing trace with hash 484323866, now seen corresponding path program 8 times [2024-06-21 20:32:12,612 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:32:12,613 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [527795894] [2024-06-21 20:32:12,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:32:12,613 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:32:12,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:32:13,495 INFO 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 20:32:13,496 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:32:13,496 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [527795894] [2024-06-21 20:32:13,496 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [527795894] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:32:13,496 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:32:13,496 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 20:32:13,496 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1874161150] [2024-06-21 20:32:13,496 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:32:13,496 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 20:32:13,496 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:32:13,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 20:32:13,497 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2024-06-21 20:32:13,603 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-21 20:32:13,603 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 223 places, 472 transitions, 6338 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 20:32:13,603 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:32:13,603 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-21 20:32:13,603 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:32:15,078 INFO L124 PetriNetUnfolderBase]: 4144/6430 cut-off events. [2024-06-21 20:32:15,078 INFO L125 PetriNetUnfolderBase]: For 488213/488218 co-relation queries the response was YES. [2024-06-21 20:32:15,135 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52005 conditions, 6430 events. 4144/6430 cut-off events. For 488213/488218 co-relation queries the response was YES. Maximal size of possible extension queue 344. Compared 37340 event pairs, 987 based on Foata normal form. 8/6435 useless extension candidates. Maximal degree in co-relation 51904. Up to 4009 conditions per place. [2024-06-21 20:32:15,171 INFO L140 encePairwiseOnDemand]: 29/44 looper letters, 232 selfloop transitions, 348 changer transitions 0/585 dead transitions. [2024-06-21 20:32:15,171 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 233 places, 585 transitions, 9234 flow [2024-06-21 20:32:15,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 20:32:15,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 20:32:15,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 240 transitions. [2024-06-21 20:32:15,172 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49586776859504134 [2024-06-21 20:32:15,172 INFO L175 Difference]: Start difference. First operand has 223 places, 472 transitions, 6338 flow. Second operand 11 states and 240 transitions. [2024-06-21 20:32:15,172 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 233 places, 585 transitions, 9234 flow [2024-06-21 20:32:15,914 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 227 places, 585 transitions, 8671 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-06-21 20:32:15,920 INFO L231 Difference]: Finished difference. Result has 231 places, 504 transitions, 7190 flow [2024-06-21 20:32:15,921 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=5808, PETRI_DIFFERENCE_MINUEND_PLACES=217, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=472, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=316, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=150, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=7190, PETRI_PLACES=231, PETRI_TRANSITIONS=504} [2024-06-21 20:32:15,921 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 186 predicate places. [2024-06-21 20:32:15,921 INFO L495 AbstractCegarLoop]: Abstraction has has 231 places, 504 transitions, 7190 flow [2024-06-21 20:32:15,921 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 20:32:15,921 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:32:15,921 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:32:15,921 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-06-21 20:32:15,921 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:32:15,921 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:32:15,922 INFO L85 PathProgramCache]: Analyzing trace with hash -36142224, now seen corresponding path program 9 times [2024-06-21 20:32:15,922 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:32:15,922 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [489010126] [2024-06-21 20:32:15,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:32:15,922 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:32:15,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:32:16,824 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:32:16,824 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:32:16,824 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [489010126] [2024-06-21 20:32:16,824 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [489010126] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:32:16,824 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:32:16,824 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 20:32:16,824 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2001669054] [2024-06-21 20:32:16,824 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:32:16,824 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 20:32:16,824 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:32:16,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 20:32:16,825 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2024-06-21 20:32:16,954 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-21 20:32:16,954 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 231 places, 504 transitions, 7190 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 20:32:16,954 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:32:16,954 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-21 20:32:16,954 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:32:18,499 INFO L124 PetriNetUnfolderBase]: 4128/6407 cut-off events. [2024-06-21 20:32:18,499 INFO L125 PetriNetUnfolderBase]: For 499395/499400 co-relation queries the response was YES. [2024-06-21 20:32:18,544 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52526 conditions, 6407 events. 4128/6407 cut-off events. For 499395/499400 co-relation queries the response was YES. Maximal size of possible extension queue 343. Compared 37251 event pairs, 981 based on Foata normal form. 8/6412 useless extension candidates. Maximal degree in co-relation 52421. Up to 3996 conditions per place. [2024-06-21 20:32:18,573 INFO L140 encePairwiseOnDemand]: 29/44 looper letters, 229 selfloop transitions, 349 changer transitions 0/583 dead transitions. [2024-06-21 20:32:18,573 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 241 places, 583 transitions, 9330 flow [2024-06-21 20:32:18,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 20:32:18,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 20:32:18,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 237 transitions. [2024-06-21 20:32:18,574 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4896694214876033 [2024-06-21 20:32:18,574 INFO L175 Difference]: Start difference. First operand has 231 places, 504 transitions, 7190 flow. Second operand 11 states and 237 transitions. [2024-06-21 20:32:18,574 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 241 places, 583 transitions, 9330 flow [2024-06-21 20:32:19,499 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 237 places, 583 transitions, 8798 flow, removed 94 selfloop flow, removed 4 redundant places. [2024-06-21 20:32:19,507 INFO L231 Difference]: Finished difference. Result has 239 places, 506 transitions, 7400 flow [2024-06-21 20:32:19,507 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=6658, PETRI_DIFFERENCE_MINUEND_PLACES=227, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=504, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=347, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=155, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=7400, PETRI_PLACES=239, PETRI_TRANSITIONS=506} [2024-06-21 20:32:19,508 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 194 predicate places. [2024-06-21 20:32:19,508 INFO L495 AbstractCegarLoop]: Abstraction has has 239 places, 506 transitions, 7400 flow [2024-06-21 20:32:19,508 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 20:32:19,508 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:32:19,508 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:32:19,509 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-06-21 20:32:19,509 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:32:19,510 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:32:19,510 INFO L85 PathProgramCache]: Analyzing trace with hash -35934834, now seen corresponding path program 10 times [2024-06-21 20:32:19,510 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:32:19,510 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [783536228] [2024-06-21 20:32:19,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:32:19,510 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:32:19,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:32:20,379 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:32:20,379 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:32:20,379 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [783536228] [2024-06-21 20:32:20,380 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [783536228] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:32:20,380 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:32:20,380 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 20:32:20,380 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [907356626] [2024-06-21 20:32:20,380 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:32:20,380 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 20:32:20,382 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:32:20,382 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 20:32:20,382 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2024-06-21 20:32:20,506 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-21 20:32:20,506 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 239 places, 506 transitions, 7400 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 20:32:20,506 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:32:20,506 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-21 20:32:20,506 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:32:22,102 INFO L124 PetriNetUnfolderBase]: 4112/6393 cut-off events. [2024-06-21 20:32:22,102 INFO L125 PetriNetUnfolderBase]: For 509570/509575 co-relation queries the response was YES. [2024-06-21 20:32:22,143 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52229 conditions, 6393 events. 4112/6393 cut-off events. For 509570/509575 co-relation queries the response was YES. Maximal size of possible extension queue 342. Compared 37257 event pairs, 956 based on Foata normal form. 8/6398 useless extension candidates. Maximal degree in co-relation 52122. Up to 3983 conditions per place. [2024-06-21 20:32:22,170 INFO L140 encePairwiseOnDemand]: 29/44 looper letters, 218 selfloop transitions, 360 changer transitions 0/583 dead transitions. [2024-06-21 20:32:22,170 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 249 places, 583 transitions, 9355 flow [2024-06-21 20:32:22,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 20:32:22,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 20:32:22,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 233 transitions. [2024-06-21 20:32:22,171 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48140495867768596 [2024-06-21 20:32:22,171 INFO L175 Difference]: Start difference. First operand has 239 places, 506 transitions, 7400 flow. Second operand 11 states and 233 transitions. [2024-06-21 20:32:22,172 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 249 places, 583 transitions, 9355 flow [2024-06-21 20:32:22,970 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 243 places, 583 transitions, 8746 flow, removed 40 selfloop flow, removed 6 redundant places. [2024-06-21 20:32:22,976 INFO L231 Difference]: Finished difference. Result has 245 places, 508 transitions, 7610 flow [2024-06-21 20:32:22,977 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=6791, PETRI_DIFFERENCE_MINUEND_PLACES=233, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=506, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=358, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=146, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=7610, PETRI_PLACES=245, PETRI_TRANSITIONS=508} [2024-06-21 20:32:22,977 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 200 predicate places. [2024-06-21 20:32:22,977 INFO L495 AbstractCegarLoop]: Abstraction has has 245 places, 508 transitions, 7610 flow [2024-06-21 20:32:22,978 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 20:32:22,978 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:32:22,978 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:32:22,978 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-06-21 20:32:22,978 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:32:22,978 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:32:22,978 INFO L85 PathProgramCache]: Analyzing trace with hash -736726428, now seen corresponding path program 1 times [2024-06-21 20:32:22,978 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:32:22,979 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1109532875] [2024-06-21 20:32:22,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:32:22,979 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:32:22,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:32:23,732 INFO 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 20:32:23,732 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:32:23,732 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1109532875] [2024-06-21 20:32:23,732 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1109532875] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:32:23,732 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:32:23,732 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:32:23,732 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1133246127] [2024-06-21 20:32:23,732 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:32:23,732 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:32:23,732 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:32:23,733 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:32:23,733 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:32:23,808 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-21 20:32:23,809 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 245 places, 508 transitions, 7610 flow. Second operand has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:32:23,809 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:32:23,809 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-21 20:32:23,809 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:32:24,874 INFO L124 PetriNetUnfolderBase]: 3544/5588 cut-off events. [2024-06-21 20:32:24,874 INFO L125 PetriNetUnfolderBase]: For 550396/550621 co-relation queries the response was YES. [2024-06-21 20:32:24,913 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48281 conditions, 5588 events. 3544/5588 cut-off events. For 550396/550621 co-relation queries the response was YES. Maximal size of possible extension queue 317. Compared 32982 event pairs, 1187 based on Foata normal form. 43/5531 useless extension candidates. Maximal degree in co-relation 48172. Up to 4813 conditions per place. [2024-06-21 20:32:24,937 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 431 selfloop transitions, 29 changer transitions 0/535 dead transitions. [2024-06-21 20:32:24,938 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 252 places, 535 transitions, 8684 flow [2024-06-21 20:32:24,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:32:24,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:32:24,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 166 transitions. [2024-06-21 20:32:24,938 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4715909090909091 [2024-06-21 20:32:24,938 INFO L175 Difference]: Start difference. First operand has 245 places, 508 transitions, 7610 flow. Second operand 8 states and 166 transitions. [2024-06-21 20:32:24,938 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 252 places, 535 transitions, 8684 flow [2024-06-21 20:32:25,679 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 246 places, 535 transitions, 8123 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-06-21 20:32:25,685 INFO L231 Difference]: Finished difference. Result has 247 places, 511 transitions, 7160 flow [2024-06-21 20:32:25,686 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=7049, PETRI_DIFFERENCE_MINUEND_PLACES=239, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=508, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=479, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7160, PETRI_PLACES=247, PETRI_TRANSITIONS=511} [2024-06-21 20:32:25,686 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 202 predicate places. [2024-06-21 20:32:25,686 INFO L495 AbstractCegarLoop]: Abstraction has has 247 places, 511 transitions, 7160 flow [2024-06-21 20:32:25,686 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:32:25,686 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:32:25,686 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:32:25,686 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2024-06-21 20:32:25,686 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:32:25,686 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:32:25,687 INFO L85 PathProgramCache]: Analyzing trace with hash -625701590, now seen corresponding path program 11 times [2024-06-21 20:32:25,687 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:32:25,687 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1565446439] [2024-06-21 20:32:25,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:32:25,687 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:32:25,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:32:26,728 INFO 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 20:32:26,728 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:32:26,728 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1565446439] [2024-06-21 20:32:26,728 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1565446439] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:32:26,728 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:32:26,729 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 20:32:26,729 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2054819649] [2024-06-21 20:32:26,729 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:32:26,729 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 20:32:26,729 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:32:26,729 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 20:32:26,729 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2024-06-21 20:32:26,870 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-21 20:32:26,871 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 247 places, 511 transitions, 7160 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 20:32:26,871 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:32:26,871 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-21 20:32:26,871 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:32:28,381 INFO L124 PetriNetUnfolderBase]: 4293/6684 cut-off events. [2024-06-21 20:32:28,382 INFO L125 PetriNetUnfolderBase]: For 544321/544323 co-relation queries the response was YES. [2024-06-21 20:32:28,435 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54387 conditions, 6684 events. 4293/6684 cut-off events. For 544321/544323 co-relation queries the response was YES. Maximal size of possible extension queue 360. Compared 39300 event pairs, 1037 based on Foata normal form. 8/6690 useless extension candidates. Maximal degree in co-relation 54277. Up to 6003 conditions per place. [2024-06-21 20:32:28,469 INFO L140 encePairwiseOnDemand]: 29/44 looper letters, 489 selfloop transitions, 108 changer transitions 0/602 dead transitions. [2024-06-21 20:32:28,469 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 257 places, 602 transitions, 9550 flow [2024-06-21 20:32:28,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 20:32:28,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 20:32:28,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 214 transitions. [2024-06-21 20:32:28,470 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44214876033057854 [2024-06-21 20:32:28,470 INFO L175 Difference]: Start difference. First operand has 247 places, 511 transitions, 7160 flow. Second operand 11 states and 214 transitions. [2024-06-21 20:32:28,471 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 257 places, 602 transitions, 9550 flow [2024-06-21 20:32:29,310 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 251 places, 602 transitions, 9427 flow, removed 20 selfloop flow, removed 6 redundant places. [2024-06-21 20:32:29,317 INFO L231 Difference]: Finished difference. Result has 255 places, 565 transitions, 8430 flow [2024-06-21 20:32:29,317 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=7049, PETRI_DIFFERENCE_MINUEND_PLACES=241, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=511, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=422, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=8430, PETRI_PLACES=255, PETRI_TRANSITIONS=565} [2024-06-21 20:32:29,318 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 210 predicate places. [2024-06-21 20:32:29,318 INFO L495 AbstractCegarLoop]: Abstraction has has 255 places, 565 transitions, 8430 flow [2024-06-21 20:32:29,318 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 20:32:29,318 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:32:29,318 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:32:29,318 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2024-06-21 20:32:29,319 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:32:29,319 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:32:29,319 INFO L85 PathProgramCache]: Analyzing trace with hash 924165392, now seen corresponding path program 12 times [2024-06-21 20:32:29,319 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:32:29,319 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2107362932] [2024-06-21 20:32:29,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:32:29,319 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:32:29,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:32:30,266 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:32:30,266 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:32:30,266 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2107362932] [2024-06-21 20:32:30,266 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2107362932] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:32:30,267 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:32:30,267 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 20:32:30,267 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [23821962] [2024-06-21 20:32:30,267 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:32:30,267 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 20:32:30,267 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:32:30,267 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 20:32:30,267 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2024-06-21 20:32:30,383 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-21 20:32:30,384 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 255 places, 565 transitions, 8430 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 20:32:30,384 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:32:30,384 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-21 20:32:30,384 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:32:32,434 INFO L124 PetriNetUnfolderBase]: 5355/8428 cut-off events. [2024-06-21 20:32:32,434 INFO L125 PetriNetUnfolderBase]: For 605724/605729 co-relation queries the response was YES. [2024-06-21 20:32:32,488 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65429 conditions, 8428 events. 5355/8428 cut-off events. For 605724/605729 co-relation queries the response was YES. Maximal size of possible extension queue 524. Compared 52804 event pairs, 1175 based on Foata normal form. 8/8433 useless extension candidates. Maximal degree in co-relation 65316. Up to 4724 conditions per place. [2024-06-21 20:32:32,523 INFO L140 encePairwiseOnDemand]: 29/44 looper letters, 284 selfloop transitions, 555 changer transitions 0/844 dead transitions. [2024-06-21 20:32:32,523 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 265 places, 844 transitions, 14016 flow [2024-06-21 20:32:32,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 20:32:32,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 20:32:32,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 241 transitions. [2024-06-21 20:32:32,524 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49793388429752067 [2024-06-21 20:32:32,524 INFO L175 Difference]: Start difference. First operand has 255 places, 565 transitions, 8430 flow. Second operand 11 states and 241 transitions. [2024-06-21 20:32:32,524 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 265 places, 844 transitions, 14016 flow [2024-06-21 20:32:33,564 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 261 places, 844 transitions, 13849 flow, removed 30 selfloop flow, removed 4 redundant places. [2024-06-21 20:32:33,574 INFO L231 Difference]: Finished difference. Result has 267 places, 745 transitions, 12411 flow [2024-06-21 20:32:33,574 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=8263, PETRI_DIFFERENCE_MINUEND_PLACES=251, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=565, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=375, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=164, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=12411, PETRI_PLACES=267, PETRI_TRANSITIONS=745} [2024-06-21 20:32:33,574 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 222 predicate places. [2024-06-21 20:32:33,575 INFO L495 AbstractCegarLoop]: Abstraction has has 267 places, 745 transitions, 12411 flow [2024-06-21 20:32:33,575 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 20:32:33,575 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:32:33,575 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:32:33,575 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2024-06-21 20:32:33,575 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:32:33,575 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:32:33,576 INFO L85 PathProgramCache]: Analyzing trace with hash -625551860, now seen corresponding path program 13 times [2024-06-21 20:32:33,576 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:32:33,576 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1980478579] [2024-06-21 20:32:33,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:32:33,576 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:32:33,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:32:34,500 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:32:34,500 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:32:34,500 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1980478579] [2024-06-21 20:32:34,500 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1980478579] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:32:34,500 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:32:34,500 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 20:32:34,500 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [716764158] [2024-06-21 20:32:34,501 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:32:34,501 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 20:32:34,501 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:32:34,501 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 20:32:34,501 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2024-06-21 20:32:34,608 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-21 20:32:34,609 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 267 places, 745 transitions, 12411 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 20:32:34,609 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:32:34,609 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-21 20:32:34,609 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:32:36,626 INFO L124 PetriNetUnfolderBase]: 5339/8405 cut-off events. [2024-06-21 20:32:36,626 INFO L125 PetriNetUnfolderBase]: For 627557/627562 co-relation queries the response was YES. [2024-06-21 20:32:36,693 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69025 conditions, 8405 events. 5339/8405 cut-off events. For 627557/627562 co-relation queries the response was YES. Maximal size of possible extension queue 522. Compared 52700 event pairs, 1166 based on Foata normal form. 8/8410 useless extension candidates. Maximal degree in co-relation 68907. Up to 4711 conditions per place. [2024-06-21 20:32:36,734 INFO L140 encePairwiseOnDemand]: 29/44 looper letters, 278 selfloop transitions, 559 changer transitions 0/842 dead transitions. [2024-06-21 20:32:36,734 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 277 places, 842 transitions, 15307 flow [2024-06-21 20:32:36,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 20:32:36,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 20:32:36,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 237 transitions. [2024-06-21 20:32:36,736 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4896694214876033 [2024-06-21 20:32:36,736 INFO L175 Difference]: Start difference. First operand has 267 places, 745 transitions, 12411 flow. Second operand 11 states and 237 transitions. [2024-06-21 20:32:36,736 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 277 places, 842 transitions, 15307 flow [2024-06-21 20:32:37,717 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 274 places, 842 transitions, 14623 flow, removed 88 selfloop flow, removed 3 redundant places. [2024-06-21 20:32:37,992 INFO L231 Difference]: Finished difference. Result has 276 places, 748 transitions, 12953 flow [2024-06-21 20:32:37,992 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=11727, PETRI_DIFFERENCE_MINUEND_PLACES=264, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=745, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=556, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=186, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=12953, PETRI_PLACES=276, PETRI_TRANSITIONS=748} [2024-06-21 20:32:37,993 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 231 predicate places. [2024-06-21 20:32:37,993 INFO L495 AbstractCegarLoop]: Abstraction has has 276 places, 748 transitions, 12953 flow [2024-06-21 20:32:37,993 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 20:32:37,993 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:32:37,993 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:32:37,993 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2024-06-21 20:32:37,993 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:32:37,994 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:32:37,994 INFO L85 PathProgramCache]: Analyzing trace with hash -481661330, now seen corresponding path program 14 times [2024-06-21 20:32:37,994 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:32:37,994 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2075939739] [2024-06-21 20:32:37,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:32:37,994 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:32:38,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:32:38,932 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 20:32:38,932 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:32:38,932 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2075939739] [2024-06-21 20:32:38,932 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2075939739] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:32:38,932 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:32:38,932 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 20:32:38,932 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [312863824] [2024-06-21 20:32:38,932 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:32:38,932 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 20:32:38,932 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:32:38,933 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 20:32:38,933 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2024-06-21 20:32:39,054 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-21 20:32:39,054 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 276 places, 748 transitions, 12953 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 20:32:39,054 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:32:39,054 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-21 20:32:39,054 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:32:41,490 INFO L124 PetriNetUnfolderBase]: 5533/8735 cut-off events. [2024-06-21 20:32:41,490 INFO L125 PetriNetUnfolderBase]: For 704011/704016 co-relation queries the response was YES. [2024-06-21 20:32:41,609 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72941 conditions, 8735 events. 5533/8735 cut-off events. For 704011/704016 co-relation queries the response was YES. Maximal size of possible extension queue 553. Compared 55490 event pairs, 1246 based on Foata normal form. 10/8742 useless extension candidates. Maximal degree in co-relation 72821. Up to 4882 conditions per place. [2024-06-21 20:32:41,667 INFO L140 encePairwiseOnDemand]: 29/44 looper letters, 300 selfloop transitions, 569 changer transitions 0/874 dead transitions. [2024-06-21 20:32:41,667 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 286 places, 874 transitions, 17115 flow [2024-06-21 20:32:41,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 20:32:41,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 20:32:41,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 244 transitions. [2024-06-21 20:32:41,668 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5041322314049587 [2024-06-21 20:32:41,668 INFO L175 Difference]: Start difference. First operand has 276 places, 748 transitions, 12953 flow. Second operand 11 states and 244 transitions. [2024-06-21 20:32:41,668 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 286 places, 874 transitions, 17115 flow [2024-06-21 20:32:42,951 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 280 places, 874 transitions, 16124 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-06-21 20:32:42,962 INFO L231 Difference]: Finished difference. Result has 283 places, 781 transitions, 14002 flow [2024-06-21 20:32:42,963 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=12016, PETRI_DIFFERENCE_MINUEND_PLACES=270, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=748, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=536, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=206, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=14002, PETRI_PLACES=283, PETRI_TRANSITIONS=781} [2024-06-21 20:32:42,963 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 238 predicate places. [2024-06-21 20:32:42,963 INFO L495 AbstractCegarLoop]: Abstraction has has 283 places, 781 transitions, 14002 flow [2024-06-21 20:32:42,963 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 20:32:42,964 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:32:42,964 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:32:42,964 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2024-06-21 20:32:42,964 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:32:42,964 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:32:42,964 INFO L85 PathProgramCache]: Analyzing trace with hash -481666910, now seen corresponding path program 15 times [2024-06-21 20:32:42,964 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:32:42,965 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [536106285] [2024-06-21 20:32:42,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:32:42,965 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:32:42,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:32:44,024 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 20:32:44,024 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:32:44,024 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [536106285] [2024-06-21 20:32:44,025 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [536106285] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:32:44,025 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:32:44,025 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 20:32:44,025 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [78587169] [2024-06-21 20:32:44,025 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:32:44,025 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 20:32:44,025 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:32:44,026 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 20:32:44,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2024-06-21 20:32:44,148 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-21 20:32:44,148 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 283 places, 781 transitions, 14002 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 20:32:44,148 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:32:44,148 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-21 20:32:44,148 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:32:46,561 INFO L124 PetriNetUnfolderBase]: 5511/8710 cut-off events. [2024-06-21 20:32:46,562 INFO L125 PetriNetUnfolderBase]: For 713027/713032 co-relation queries the response was YES. [2024-06-21 20:32:46,634 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72953 conditions, 8710 events. 5511/8710 cut-off events. For 713027/713032 co-relation queries the response was YES. Maximal size of possible extension queue 550. Compared 55321 event pairs, 1239 based on Foata normal form. 10/8717 useless extension candidates. Maximal degree in co-relation 72830. Up to 4864 conditions per place. [2024-06-21 20:32:46,680 INFO L140 encePairwiseOnDemand]: 29/44 looper letters, 296 selfloop transitions, 571 changer transitions 0/872 dead transitions. [2024-06-21 20:32:46,680 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 293 places, 872 transitions, 17142 flow [2024-06-21 20:32:46,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 20:32:46,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 20:32:46,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 241 transitions. [2024-06-21 20:32:46,681 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49793388429752067 [2024-06-21 20:32:46,681 INFO L175 Difference]: Start difference. First operand has 283 places, 781 transitions, 14002 flow. Second operand 11 states and 241 transitions. [2024-06-21 20:32:46,681 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 293 places, 872 transitions, 17142 flow [2024-06-21 20:32:47,846 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 288 places, 872 transitions, 15989 flow, removed 141 selfloop flow, removed 5 redundant places. [2024-06-21 20:32:47,857 INFO L231 Difference]: Finished difference. Result has 290 places, 785 transitions, 14088 flow [2024-06-21 20:32:47,858 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=12849, PETRI_DIFFERENCE_MINUEND_PLACES=278, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=781, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=567, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=210, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=14088, PETRI_PLACES=290, PETRI_TRANSITIONS=785} [2024-06-21 20:32:47,858 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 245 predicate places. [2024-06-21 20:32:47,858 INFO L495 AbstractCegarLoop]: Abstraction has has 290 places, 785 transitions, 14088 flow [2024-06-21 20:32:47,858 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 20:32:47,858 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:32:47,859 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:32:47,859 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2024-06-21 20:32:47,859 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:32:47,859 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:32:47,860 INFO L85 PathProgramCache]: Analyzing trace with hash -481459520, now seen corresponding path program 16 times [2024-06-21 20:32:47,860 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:32:47,860 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1176670026] [2024-06-21 20:32:47,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:32:47,860 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:32:47,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:32:48,778 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:32:48,778 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:32:48,778 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1176670026] [2024-06-21 20:32:48,778 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1176670026] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:32:48,778 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:32:48,778 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 20:32:48,778 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [852764650] [2024-06-21 20:32:48,778 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:32:48,778 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 20:32:48,778 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:32:48,779 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 20:32:48,779 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2024-06-21 20:32:48,897 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-21 20:32:48,897 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 290 places, 785 transitions, 14088 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 20:32:48,897 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:32:48,897 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-21 20:32:48,897 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:32:51,219 INFO L124 PetriNetUnfolderBase]: 5489/8673 cut-off events. [2024-06-21 20:32:51,219 INFO L125 PetriNetUnfolderBase]: For 716098/716103 co-relation queries the response was YES. [2024-06-21 20:32:51,289 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72259 conditions, 8673 events. 5489/8673 cut-off events. For 716098/716103 co-relation queries the response was YES. Maximal size of possible extension queue 547. Compared 55064 event pairs, 1205 based on Foata normal form. 10/8680 useless extension candidates. Maximal degree in co-relation 72134. Up to 4846 conditions per place. [2024-06-21 20:32:51,332 INFO L140 encePairwiseOnDemand]: 29/44 looper letters, 288 selfloop transitions, 578 changer transitions 0/871 dead transitions. [2024-06-21 20:32:51,332 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 300 places, 871 transitions, 17000 flow [2024-06-21 20:32:51,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 20:32:51,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 20:32:51,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 237 transitions. [2024-06-21 20:32:51,333 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4896694214876033 [2024-06-21 20:32:51,333 INFO L175 Difference]: Start difference. First operand has 290 places, 785 transitions, 14088 flow. Second operand 11 states and 237 transitions. [2024-06-21 20:32:51,333 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 300 places, 871 transitions, 17000 flow [2024-06-21 20:32:52,679 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 293 places, 871 transitions, 15824 flow, removed 60 selfloop flow, removed 7 redundant places. [2024-06-21 20:32:52,690 INFO L231 Difference]: Finished difference. Result has 294 places, 785 transitions, 14086 flow [2024-06-21 20:32:52,691 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=12912, PETRI_DIFFERENCE_MINUEND_PLACES=283, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=785, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=578, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=207, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=14086, PETRI_PLACES=294, PETRI_TRANSITIONS=785} [2024-06-21 20:32:52,691 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 249 predicate places. [2024-06-21 20:32:52,691 INFO L495 AbstractCegarLoop]: Abstraction has has 294 places, 785 transitions, 14086 flow [2024-06-21 20:32:52,691 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 20:32:52,691 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:32:52,691 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:32:52,692 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2024-06-21 20:32:52,692 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 20:32:52,692 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:32:52,692 INFO L85 PathProgramCache]: Analyzing trace with hash -475035410, now seen corresponding path program 17 times [2024-06-21 20:32:52,692 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:32:52,692 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1779514779] [2024-06-21 20:32:52,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:32:52,692 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:32:52,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:32:53,622 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:32:53,622 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:32:53,622 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1779514779] [2024-06-21 20:32:53,622 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1779514779] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:32:53,622 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:32:53,622 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 20:32:53,623 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [713034278] [2024-06-21 20:32:53,623 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:32:53,623 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 20:32:53,623 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:32:53,623 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 20:32:53,623 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2024-06-21 20:32:53,726 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-21 20:32:53,726 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 294 places, 785 transitions, 14086 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 20:32:53,726 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:32:53,726 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-21 20:32:53,726 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:32:56,058 INFO L124 PetriNetUnfolderBase]: 5743/9047 cut-off events. [2024-06-21 20:32:56,058 INFO L125 PetriNetUnfolderBase]: For 767570/767573 co-relation queries the response was YES. [2024-06-21 20:32:56,146 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76048 conditions, 9047 events. 5743/9047 cut-off events. For 767570/767573 co-relation queries the response was YES. Maximal size of possible extension queue 573. Compared 57551 event pairs, 1113 based on Foata normal form. 8/9052 useless extension candidates. Maximal degree in co-relation 75922. Up to 5025 conditions per place. [2024-06-21 20:32:56,194 INFO L140 encePairwiseOnDemand]: 29/44 looper letters, 293 selfloop transitions, 611 changer transitions 0/909 dead transitions. [2024-06-21 20:32:56,195 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 304 places, 909 transitions, 18212 flow [2024-06-21 20:32:56,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 20:32:56,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 20:32:56,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 239 transitions. [2024-06-21 20:32:56,196 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.493801652892562 [2024-06-21 20:32:56,196 INFO L175 Difference]: Start difference. First operand has 294 places, 785 transitions, 14086 flow. Second operand 11 states and 239 transitions. [2024-06-21 20:32:56,196 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 304 places, 909 transitions, 18212 flow [2024-06-21 20:32:57,591 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 298 places, 909 transitions, 17157 flow, removed 6 selfloop flow, removed 6 redundant places. [2024-06-21 20:32:57,602 INFO L231 Difference]: Finished difference. Result has 303 places, 831 transitions, 15608 flow [2024-06-21 20:32:57,603 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=13111, PETRI_DIFFERENCE_MINUEND_PLACES=288, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=785, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=565, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=212, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=15608, PETRI_PLACES=303, PETRI_TRANSITIONS=831} [2024-06-21 20:32:57,603 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 258 predicate places. [2024-06-21 20:32:57,603 INFO L495 AbstractCegarLoop]: Abstraction has has 303 places, 831 transitions, 15608 flow [2024-06-21 20:32:57,603 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 20:32:57,603 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:32:57,603 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:32:57,603 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2024-06-21 20:32:57,604 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 20:32:57,604 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:32:57,604 INFO L85 PathProgramCache]: Analyzing trace with hash 2120275216, now seen corresponding path program 18 times [2024-06-21 20:32:57,604 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:32:57,604 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [265202999] [2024-06-21 20:32:57,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:32:57,604 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:32:57,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:32:58,543 INFO 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 20:32:58,543 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:32:58,543 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [265202999] [2024-06-21 20:32:58,543 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [265202999] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:32:58,543 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:32:58,543 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 20:32:58,543 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1832751426] [2024-06-21 20:32:58,543 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:32:58,543 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 20:32:58,543 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:32:58,544 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 20:32:58,544 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2024-06-21 20:32:58,658 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-21 20:32:58,658 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 303 places, 831 transitions, 15608 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 20:32:58,658 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:32:58,658 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-21 20:32:58,658 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:33:01,005 INFO L124 PetriNetUnfolderBase]: 5721/9022 cut-off events. [2024-06-21 20:33:01,005 INFO L125 PetriNetUnfolderBase]: For 776863/776866 co-relation queries the response was YES. [2024-06-21 20:33:01,085 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77253 conditions, 9022 events. 5721/9022 cut-off events. For 776863/776866 co-relation queries the response was YES. Maximal size of possible extension queue 573. Compared 57412 event pairs, 1106 based on Foata normal form. 8/9027 useless extension candidates. Maximal degree in co-relation 77122. Up to 5007 conditions per place. [2024-06-21 20:33:01,129 INFO L140 encePairwiseOnDemand]: 29/44 looper letters, 289 selfloop transitions, 613 changer transitions 0/907 dead transitions. [2024-06-21 20:33:01,130 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 313 places, 907 transitions, 18535 flow [2024-06-21 20:33:01,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 20:33:01,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 20:33:01,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 236 transitions. [2024-06-21 20:33:01,131 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48760330578512395 [2024-06-21 20:33:01,131 INFO L175 Difference]: Start difference. First operand has 303 places, 831 transitions, 15608 flow. Second operand 11 states and 236 transitions. [2024-06-21 20:33:01,131 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 313 places, 907 transitions, 18535 flow [2024-06-21 20:33:02,590 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 309 places, 907 transitions, 17593 flow, removed 141 selfloop flow, removed 4 redundant places. [2024-06-21 20:33:02,602 INFO L231 Difference]: Finished difference. Result has 311 places, 834 transitions, 15961 flow [2024-06-21 20:33:02,603 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=14666, PETRI_DIFFERENCE_MINUEND_PLACES=299, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=831, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=610, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=218, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=15961, PETRI_PLACES=311, PETRI_TRANSITIONS=834} [2024-06-21 20:33:02,603 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 266 predicate places. [2024-06-21 20:33:02,603 INFO L495 AbstractCegarLoop]: Abstraction has has 311 places, 834 transitions, 15961 flow [2024-06-21 20:33:02,603 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 20:33:02,603 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:33:02,603 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:33:02,604 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2024-06-21 20:33:02,604 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 20:33:02,604 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:33:02,604 INFO L85 PathProgramCache]: Analyzing trace with hash 570759774, now seen corresponding path program 19 times [2024-06-21 20:33:02,604 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:33:02,604 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [160049038] [2024-06-21 20:33:02,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:33:02,604 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:33:02,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:33:03,545 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 20:33:03,546 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:33:03,546 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [160049038] [2024-06-21 20:33:03,546 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [160049038] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:33:03,546 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:33:03,546 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 20:33:03,546 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [296690281] [2024-06-21 20:33:03,546 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:33:03,546 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 20:33:03,546 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:33:03,546 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 20:33:03,546 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2024-06-21 20:33:03,648 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-21 20:33:03,648 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 311 places, 834 transitions, 15961 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 20:33:03,648 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:33:03,648 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-21 20:33:03,648 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:33:05,950 INFO L124 PetriNetUnfolderBase]: 5771/9111 cut-off events. [2024-06-21 20:33:05,950 INFO L125 PetriNetUnfolderBase]: For 810936/810939 co-relation queries the response was YES. [2024-06-21 20:33:06,079 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78113 conditions, 9111 events. 5771/9111 cut-off events. For 810936/810939 co-relation queries the response was YES. Maximal size of possible extension queue 582. Compared 58223 event pairs, 1126 based on Foata normal form. 8/9116 useless extension candidates. Maximal degree in co-relation 77980. Up to 5052 conditions per place. [2024-06-21 20:33:06,128 INFO L140 encePairwiseOnDemand]: 29/44 looper letters, 296 selfloop transitions, 617 changer transitions 0/918 dead transitions. [2024-06-21 20:33:06,128 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 321 places, 918 transitions, 19209 flow [2024-06-21 20:33:06,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 20:33:06,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 20:33:06,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 238 transitions. [2024-06-21 20:33:06,129 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49173553719008267 [2024-06-21 20:33:06,129 INFO L175 Difference]: Start difference. First operand has 311 places, 834 transitions, 15961 flow. Second operand 11 states and 238 transitions. [2024-06-21 20:33:06,130 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 321 places, 918 transitions, 19209 flow [2024-06-21 20:33:07,492 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 314 places, 918 transitions, 17996 flow, removed 24 selfloop flow, removed 7 redundant places. [2024-06-21 20:33:07,505 INFO L231 Difference]: Finished difference. Result has 316 places, 844 transitions, 16298 flow [2024-06-21 20:33:07,505 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=14775, PETRI_DIFFERENCE_MINUEND_PLACES=304, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=834, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=607, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=226, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=16298, PETRI_PLACES=316, PETRI_TRANSITIONS=844} [2024-06-21 20:33:07,505 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 271 predicate places. [2024-06-21 20:33:07,506 INFO L495 AbstractCegarLoop]: Abstraction has has 316 places, 844 transitions, 16298 flow [2024-06-21 20:33:07,506 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 20:33:07,506 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:33:07,506 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:33:07,506 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2024-06-21 20:33:07,506 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 20:33:07,506 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:33:07,506 INFO L85 PathProgramCache]: Analyzing trace with hash 578186661, now seen corresponding path program 1 times [2024-06-21 20:33:07,507 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:33:07,507 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1978827179] [2024-06-21 20:33:07,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:33:07,507 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:33:07,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:33:08,630 INFO 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 20:33:08,630 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:33:08,630 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1978827179] [2024-06-21 20:33:08,630 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1978827179] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:33:08,631 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:33:08,631 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:33:08,631 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [668696065] [2024-06-21 20:33:08,631 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:33:08,631 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:33:08,631 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:33:08,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:33:08,632 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:33:08,767 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-21 20:33:08,767 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 316 places, 844 transitions, 16298 flow. Second operand has 10 states, 10 states have (on average 12.3) internal successors, (123), 10 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:33:08,767 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:33:08,767 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-21 20:33:08,767 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:33:11,120 INFO L124 PetriNetUnfolderBase]: 5450/8741 cut-off events. [2024-06-21 20:33:11,120 INFO L125 PetriNetUnfolderBase]: For 864326/864394 co-relation queries the response was YES. [2024-06-21 20:33:11,186 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76112 conditions, 8741 events. 5450/8741 cut-off events. For 864326/864394 co-relation queries the response was YES. Maximal size of possible extension queue 597. Compared 57486 event pairs, 1628 based on Foata normal form. 68/8696 useless extension candidates. Maximal degree in co-relation 75977. Up to 7559 conditions per place. [2024-06-21 20:33:11,228 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 777 selfloop transitions, 58 changer transitions 0/885 dead transitions. [2024-06-21 20:33:11,228 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 325 places, 885 transitions, 18260 flow [2024-06-21 20:33:11,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 20:33:11,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 20:33:11,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 205 transitions. [2024-06-21 20:33:11,229 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4659090909090909 [2024-06-21 20:33:11,229 INFO L175 Difference]: Start difference. First operand has 316 places, 844 transitions, 16298 flow. Second operand 10 states and 205 transitions. [2024-06-21 20:33:11,229 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 325 places, 885 transitions, 18260 flow [2024-06-21 20:33:12,580 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 319 places, 885 transitions, 17008 flow, removed 51 selfloop flow, removed 6 redundant places. [2024-06-21 20:33:12,592 INFO L231 Difference]: Finished difference. Result has 322 places, 850 transitions, 15287 flow [2024-06-21 20:33:12,592 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=15049, PETRI_DIFFERENCE_MINUEND_PLACES=310, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=844, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=788, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=15287, PETRI_PLACES=322, PETRI_TRANSITIONS=850} [2024-06-21 20:33:12,592 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 277 predicate places. [2024-06-21 20:33:12,592 INFO L495 AbstractCegarLoop]: Abstraction has has 322 places, 850 transitions, 15287 flow [2024-06-21 20:33:12,593 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.3) internal successors, (123), 10 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:33:12,593 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:33:12,593 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:33:12,593 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2024-06-21 20:33:12,593 INFO L420 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:33:12,593 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:33:12,593 INFO L85 PathProgramCache]: Analyzing trace with hash 577909614, now seen corresponding path program 20 times [2024-06-21 20:33:12,593 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:33:12,593 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1563686091] [2024-06-21 20:33:12,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:33:12,593 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:33:12,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:33:13,500 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:33:13,500 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:33:13,500 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1563686091] [2024-06-21 20:33:13,500 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1563686091] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:33:13,500 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:33:13,500 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 20:33:13,500 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1188146340] [2024-06-21 20:33:13,500 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:33:13,500 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 20:33:13,500 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:33:13,501 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 20:33:13,501 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2024-06-21 20:33:13,602 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-21 20:33:13,603 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 322 places, 850 transitions, 15287 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 20:33:13,603 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:33:13,603 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-21 20:33:13,603 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:33:16,069 INFO L124 PetriNetUnfolderBase]: 5766/9131 cut-off events. [2024-06-21 20:33:16,069 INFO L125 PetriNetUnfolderBase]: For 816334/816337 co-relation queries the response was YES. [2024-06-21 20:33:16,148 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76878 conditions, 9131 events. 5766/9131 cut-off events. For 816334/816337 co-relation queries the response was YES. Maximal size of possible extension queue 583. Compared 58780 event pairs, 1012 based on Foata normal form. 8/9136 useless extension candidates. Maximal degree in co-relation 76740. Up to 5061 conditions per place. [2024-06-21 20:33:16,191 INFO L140 encePairwiseOnDemand]: 29/44 looper letters, 269 selfloop transitions, 650 changer transitions 0/924 dead transitions. [2024-06-21 20:33:16,191 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 332 places, 924 transitions, 18083 flow [2024-06-21 20:33:16,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 20:33:16,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 20:33:16,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 232 transitions. [2024-06-21 20:33:16,192 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4793388429752066 [2024-06-21 20:33:16,192 INFO L175 Difference]: Start difference. First operand has 322 places, 850 transitions, 15287 flow. Second operand 11 states and 232 transitions. [2024-06-21 20:33:16,192 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 332 places, 924 transitions, 18083 flow [2024-06-21 20:33:18,052 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 325 places, 924 transitions, 16987 flow, removed 88 selfloop flow, removed 7 redundant places. [2024-06-21 20:33:18,063 INFO L231 Difference]: Finished difference. Result has 326 places, 850 transitions, 15505 flow [2024-06-21 20:33:18,064 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=14191, PETRI_DIFFERENCE_MINUEND_PLACES=315, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=850, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=650, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=200, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=15505, PETRI_PLACES=326, PETRI_TRANSITIONS=850} [2024-06-21 20:33:18,064 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 281 predicate places. [2024-06-21 20:33:18,064 INFO L495 AbstractCegarLoop]: Abstraction has has 326 places, 850 transitions, 15505 flow [2024-06-21 20:33:18,064 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 20:33:18,064 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:33:18,064 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:33:18,064 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2024-06-21 20:33:18,064 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 20:33:18,064 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:33:18,065 INFO L85 PathProgramCache]: Analyzing trace with hash -321891730, now seen corresponding path program 2 times [2024-06-21 20:33:18,065 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:33:18,065 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2015455649] [2024-06-21 20:33:18,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:33:18,065 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:33:18,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:33:18,811 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 20:33:18,812 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:33:18,812 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2015455649] [2024-06-21 20:33:18,812 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2015455649] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:33:18,812 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:33:18,812 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:33:18,812 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [446993511] [2024-06-21 20:33:18,812 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:33:18,812 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:33:18,812 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:33:18,812 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:33:18,812 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:33:18,918 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-21 20:33:18,918 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 326 places, 850 transitions, 15505 flow. Second operand has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:33:18,918 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:33:18,918 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-21 20:33:18,918 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:33:20,832 INFO L124 PetriNetUnfolderBase]: 4872/7842 cut-off events. [2024-06-21 20:33:20,832 INFO L125 PetriNetUnfolderBase]: For 897134/897618 co-relation queries the response was YES. [2024-06-21 20:33:20,902 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70130 conditions, 7842 events. 4872/7842 cut-off events. For 897134/897618 co-relation queries the response was YES. Maximal size of possible extension queue 534. Compared 50835 event pairs, 1266 based on Foata normal form. 54/7750 useless extension candidates. Maximal degree in co-relation 69994. Up to 6505 conditions per place. [2024-06-21 20:33:20,940 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 732 selfloop transitions, 33 changer transitions 0/877 dead transitions. [2024-06-21 20:33:20,940 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 333 places, 877 transitions, 17183 flow [2024-06-21 20:33:20,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:33:20,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:33:20,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 166 transitions. [2024-06-21 20:33:20,941 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4715909090909091 [2024-06-21 20:33:20,941 INFO L175 Difference]: Start difference. First operand has 326 places, 850 transitions, 15505 flow. Second operand 8 states and 166 transitions. [2024-06-21 20:33:20,941 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 333 places, 877 transitions, 17183 flow [2024-06-21 20:33:22,528 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 327 places, 877 transitions, 16037 flow, removed 6 selfloop flow, removed 6 redundant places. [2024-06-21 20:33:22,539 INFO L231 Difference]: Finished difference. Result has 328 places, 856 transitions, 14505 flow [2024-06-21 20:33:22,540 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=14359, PETRI_DIFFERENCE_MINUEND_PLACES=320, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=850, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=817, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=14505, PETRI_PLACES=328, PETRI_TRANSITIONS=856} [2024-06-21 20:33:22,540 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 283 predicate places. [2024-06-21 20:33:22,540 INFO L495 AbstractCegarLoop]: Abstraction has has 328 places, 856 transitions, 14505 flow [2024-06-21 20:33:22,540 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:33:22,540 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:33:22,540 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:33:22,540 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2024-06-21 20:33:22,541 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 20:33:22,541 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:33:22,541 INFO L85 PathProgramCache]: Analyzing trace with hash 300532160, now seen corresponding path program 3 times [2024-06-21 20:33:22,541 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:33:22,541 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [34927314] [2024-06-21 20:33:22,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:33:22,541 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:33:22,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:33:23,496 INFO 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 20:33:23,497 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:33:23,497 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [34927314] [2024-06-21 20:33:23,497 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [34927314] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:33:23,497 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:33:23,497 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:33:23,497 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1257241396] [2024-06-21 20:33:23,497 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:33:23,497 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:33:23,497 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:33:23,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:33:23,498 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:33:23,581 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-21 20:33:23,582 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 328 places, 856 transitions, 14505 flow. Second operand has 9 states, 9 states have (on average 13.555555555555555) internal successors, (122), 9 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:33:23,582 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:33:23,582 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-21 20:33:23,582 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:33:25,307 INFO L124 PetriNetUnfolderBase]: 4882/7862 cut-off events. [2024-06-21 20:33:25,307 INFO L125 PetriNetUnfolderBase]: For 893904/894305 co-relation queries the response was YES. [2024-06-21 20:33:25,374 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68553 conditions, 7862 events. 4882/7862 cut-off events. For 893904/894305 co-relation queries the response was YES. Maximal size of possible extension queue 533. Compared 50947 event pairs, 1234 based on Foata normal form. 51/7776 useless extension candidates. Maximal degree in co-relation 68416. Up to 6510 conditions per place. [2024-06-21 20:33:25,409 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 727 selfloop transitions, 41 changer transitions 0/880 dead transitions. [2024-06-21 20:33:25,409 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 335 places, 880 transitions, 16185 flow [2024-06-21 20:33:25,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:33:25,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:33:25,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 163 transitions. [2024-06-21 20:33:25,410 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4630681818181818 [2024-06-21 20:33:25,410 INFO L175 Difference]: Start difference. First operand has 328 places, 856 transitions, 14505 flow. Second operand 8 states and 163 transitions. [2024-06-21 20:33:25,410 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 335 places, 880 transitions, 16185 flow [2024-06-21 20:33:27,261 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 331 places, 880 transitions, 16114 flow, removed 17 selfloop flow, removed 4 redundant places. [2024-06-21 20:33:27,272 INFO L231 Difference]: Finished difference. Result has 333 places, 862 transitions, 14614 flow [2024-06-21 20:33:27,273 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=14434, PETRI_DIFFERENCE_MINUEND_PLACES=324, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=856, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=815, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=14614, PETRI_PLACES=333, PETRI_TRANSITIONS=862} [2024-06-21 20:33:27,273 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 288 predicate places. [2024-06-21 20:33:27,273 INFO L495 AbstractCegarLoop]: Abstraction has has 333 places, 862 transitions, 14614 flow [2024-06-21 20:33:27,273 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.555555555555555) internal successors, (122), 9 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:33:27,273 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:33:27,273 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:33:27,273 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2024-06-21 20:33:27,273 INFO L420 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:33:27,274 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:33:27,274 INFO L85 PathProgramCache]: Analyzing trace with hash 327344525, now seen corresponding path program 1 times [2024-06-21 20:33:27,274 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:33:27,274 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [388484593] [2024-06-21 20:33:27,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:33:27,274 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:33:27,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:33:28,360 INFO 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 20:33:28,360 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:33:28,361 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [388484593] [2024-06-21 20:33:28,361 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [388484593] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:33:28,361 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:33:28,361 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:33:28,361 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [626258337] [2024-06-21 20:33:28,361 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:33:28,361 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:33:28,361 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:33:28,361 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:33:28,361 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:33:28,506 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 44 [2024-06-21 20:33:28,506 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 333 places, 862 transitions, 14614 flow. Second operand has 8 states, 8 states have (on average 14.75) internal successors, (118), 8 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:33:28,506 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:33:28,506 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 44 [2024-06-21 20:33:28,506 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:33:30,090 INFO L124 PetriNetUnfolderBase]: 4492/7168 cut-off events. [2024-06-21 20:33:30,091 INFO L125 PetriNetUnfolderBase]: For 967180/967714 co-relation queries the response was YES. [2024-06-21 20:33:30,155 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65061 conditions, 7168 events. 4492/7168 cut-off events. For 967180/967714 co-relation queries the response was YES. Maximal size of possible extension queue 488. Compared 45521 event pairs, 1175 based on Foata normal form. 96/6905 useless extension candidates. Maximal degree in co-relation 64922. Up to 5898 conditions per place. [2024-06-21 20:33:30,189 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 703 selfloop transitions, 20 changer transitions 0/883 dead transitions. [2024-06-21 20:33:30,189 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 340 places, 883 transitions, 16182 flow [2024-06-21 20:33:30,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:33:30,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:33:30,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 167 transitions. [2024-06-21 20:33:30,190 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4744318181818182 [2024-06-21 20:33:30,190 INFO L175 Difference]: Start difference. First operand has 333 places, 862 transitions, 14614 flow. Second operand 8 states and 167 transitions. [2024-06-21 20:33:30,190 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 340 places, 883 transitions, 16182 flow [2024-06-21 20:33:31,460 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 335 places, 883 transitions, 16074 flow, removed 23 selfloop flow, removed 5 redundant places. [2024-06-21 20:33:31,472 INFO L231 Difference]: Finished difference. Result has 336 places, 865 transitions, 14600 flow [2024-06-21 20:33:31,472 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=14506, PETRI_DIFFERENCE_MINUEND_PLACES=328, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=862, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=842, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=14600, PETRI_PLACES=336, PETRI_TRANSITIONS=865} [2024-06-21 20:33:31,473 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 291 predicate places. [2024-06-21 20:33:31,473 INFO L495 AbstractCegarLoop]: Abstraction has has 336 places, 865 transitions, 14600 flow [2024-06-21 20:33:31,473 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.75) internal successors, (118), 8 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:33:31,473 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:33:31,473 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:33:31,473 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2024-06-21 20:33:31,473 INFO L420 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:33:31,473 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:33:31,473 INFO L85 PathProgramCache]: Analyzing trace with hash 1678476888, now seen corresponding path program 21 times [2024-06-21 20:33:31,473 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:33:31,473 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1375804121] [2024-06-21 20:33:31,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:33:31,473 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:33:31,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:33:32,496 INFO 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 20:33:32,496 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:33:32,496 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1375804121] [2024-06-21 20:33:32,496 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1375804121] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:33:32,496 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:33:32,496 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 20:33:32,496 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [874177126] [2024-06-21 20:33:32,496 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:33:32,496 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 20:33:32,496 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:33:32,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 20:33:32,497 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2024-06-21 20:33:32,596 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-21 20:33:32,597 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 336 places, 865 transitions, 14600 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 20:33:32,597 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:33:32,597 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-21 20:33:32,597 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:33:35,085 INFO L124 PetriNetUnfolderBase]: 5775/9154 cut-off events. [2024-06-21 20:33:35,085 INFO L125 PetriNetUnfolderBase]: For 863756/863762 co-relation queries the response was YES. [2024-06-21 20:33:35,163 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76029 conditions, 9154 events. 5775/9154 cut-off events. For 863756/863762 co-relation queries the response was YES. Maximal size of possible extension queue 584. Compared 59028 event pairs, 1680 based on Foata normal form. 12/9164 useless extension candidates. Maximal degree in co-relation 75889. Up to 7946 conditions per place. [2024-06-21 20:33:35,204 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 739 selfloop transitions, 164 changer transitions 0/908 dead transitions. [2024-06-21 20:33:35,204 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 345 places, 908 transitions, 16681 flow [2024-06-21 20:33:35,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 20:33:35,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 20:33:35,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 196 transitions. [2024-06-21 20:33:35,205 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44545454545454544 [2024-06-21 20:33:35,205 INFO L175 Difference]: Start difference. First operand has 336 places, 865 transitions, 14600 flow. Second operand 10 states and 196 transitions. [2024-06-21 20:33:35,205 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 345 places, 908 transitions, 16681 flow [2024-06-21 20:33:36,872 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 340 places, 908 transitions, 16561 flow, removed 38 selfloop flow, removed 5 redundant places. [2024-06-21 20:33:36,884 INFO L231 Difference]: Finished difference. Result has 341 places, 865 transitions, 14868 flow [2024-06-21 20:33:36,884 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=14480, PETRI_DIFFERENCE_MINUEND_PLACES=331, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=865, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=164, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=701, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=14868, PETRI_PLACES=341, PETRI_TRANSITIONS=865} [2024-06-21 20:33:36,884 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 296 predicate places. [2024-06-21 20:33:36,884 INFO L495 AbstractCegarLoop]: Abstraction has has 341 places, 865 transitions, 14868 flow [2024-06-21 20:33:36,884 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 20:33:36,884 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:33:36,884 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:33:36,885 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2024-06-21 20:33:36,885 INFO L420 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:33:36,885 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:33:36,885 INFO L85 PathProgramCache]: Analyzing trace with hash 1678626618, now seen corresponding path program 22 times [2024-06-21 20:33:36,885 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:33:36,885 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [887422444] [2024-06-21 20:33:36,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:33:36,885 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:33:36,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:33:37,889 INFO 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 20:33:37,889 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:33:37,890 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [887422444] [2024-06-21 20:33:37,890 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [887422444] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:33:37,890 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:33:37,890 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 20:33:37,890 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1816294507] [2024-06-21 20:33:37,890 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:33:37,890 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 20:33:37,890 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:33:37,890 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 20:33:37,891 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=62, Unknown=0, NotChecked=0, Total=110 [2024-06-21 20:33:37,994 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-21 20:33:37,995 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 341 places, 865 transitions, 14868 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 20:33:37,995 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:33:37,995 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-21 20:33:37,995 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:33:40,596 INFO L124 PetriNetUnfolderBase]: 5863/9298 cut-off events. [2024-06-21 20:33:40,596 INFO L125 PetriNetUnfolderBase]: For 908112/908119 co-relation queries the response was YES. [2024-06-21 20:33:40,684 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78600 conditions, 9298 events. 5863/9298 cut-off events. For 908112/908119 co-relation queries the response was YES. Maximal size of possible extension queue 596. Compared 60264 event pairs, 1055 based on Foata normal form. 10/9305 useless extension candidates. Maximal degree in co-relation 78459. Up to 5160 conditions per place. [2024-06-21 20:33:40,728 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 234 selfloop transitions, 696 changer transitions 0/935 dead transitions. [2024-06-21 20:33:40,728 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 350 places, 935 transitions, 18084 flow [2024-06-21 20:33:40,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 20:33:40,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 20:33:40,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 213 transitions. [2024-06-21 20:33:40,729 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48409090909090907 [2024-06-21 20:33:40,729 INFO L175 Difference]: Start difference. First operand has 341 places, 865 transitions, 14868 flow. Second operand 10 states and 213 transitions. [2024-06-21 20:33:40,729 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 350 places, 935 transitions, 18084 flow [2024-06-21 20:33:42,903 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 342 places, 935 transitions, 17796 flow, removed 26 selfloop flow, removed 8 redundant places. [2024-06-21 20:33:42,916 INFO L231 Difference]: Finished difference. Result has 343 places, 877 transitions, 16353 flow [2024-06-21 20:33:42,916 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=14604, PETRI_DIFFERENCE_MINUEND_PLACES=333, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=865, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=684, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=181, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=16353, PETRI_PLACES=343, PETRI_TRANSITIONS=877} [2024-06-21 20:33:42,916 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 298 predicate places. [2024-06-21 20:33:42,916 INFO L495 AbstractCegarLoop]: Abstraction has has 343 places, 877 transitions, 16353 flow [2024-06-21 20:33:42,917 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 20:33:42,917 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:33:42,917 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:33:42,917 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2024-06-21 20:33:42,917 INFO L420 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:33:42,917 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:33:42,917 INFO L85 PathProgramCache]: Analyzing trace with hash 1678621038, now seen corresponding path program 23 times [2024-06-21 20:33:42,918 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:33:42,918 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1746572459] [2024-06-21 20:33:42,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:33:42,918 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:33:42,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:33:43,912 INFO 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 20:33:43,912 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:33:43,912 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1746572459] [2024-06-21 20:33:43,912 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1746572459] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:33:43,912 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:33:43,912 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 20:33:43,912 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [320508690] [2024-06-21 20:33:43,913 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:33:43,913 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 20:33:43,913 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:33:43,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 20:33:43,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=62, Unknown=0, NotChecked=0, Total=110 [2024-06-21 20:33:44,012 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-21 20:33:44,012 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 343 places, 877 transitions, 16353 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 20:33:44,012 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:33:44,012 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-21 20:33:44,012 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:33:46,619 INFO L124 PetriNetUnfolderBase]: 5847/9285 cut-off events. [2024-06-21 20:33:46,619 INFO L125 PetriNetUnfolderBase]: For 870290/870297 co-relation queries the response was YES. [2024-06-21 20:33:46,728 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79850 conditions, 9285 events. 5847/9285 cut-off events. For 870290/870297 co-relation queries the response was YES. Maximal size of possible extension queue 597. Compared 60277 event pairs, 1091 based on Foata normal form. 10/9292 useless extension candidates. Maximal degree in co-relation 79709. Up to 5147 conditions per place. [2024-06-21 20:33:46,773 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 240 selfloop transitions, 685 changer transitions 0/930 dead transitions. [2024-06-21 20:33:46,774 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 352 places, 930 transitions, 18908 flow [2024-06-21 20:33:46,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 20:33:46,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 20:33:46,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 213 transitions. [2024-06-21 20:33:46,774 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48409090909090907 [2024-06-21 20:33:46,775 INFO L175 Difference]: Start difference. First operand has 343 places, 877 transitions, 16353 flow. Second operand 10 states and 213 transitions. [2024-06-21 20:33:46,775 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 352 places, 930 transitions, 18908 flow [2024-06-21 20:33:48,748 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 342 places, 930 transitions, 17739 flow, removed 121 selfloop flow, removed 10 redundant places. [2024-06-21 20:33:48,761 INFO L231 Difference]: Finished difference. Result has 343 places, 877 transitions, 16607 flow [2024-06-21 20:33:48,762 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=15196, PETRI_DIFFERENCE_MINUEND_PLACES=333, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=877, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=685, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=192, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=16607, PETRI_PLACES=343, PETRI_TRANSITIONS=877} [2024-06-21 20:33:48,762 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 298 predicate places. [2024-06-21 20:33:48,762 INFO L495 AbstractCegarLoop]: Abstraction has has 343 places, 877 transitions, 16607 flow [2024-06-21 20:33:48,762 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 20:33:48,762 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:33:48,762 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:33:48,762 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2024-06-21 20:33:48,763 INFO L420 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:33:48,763 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:33:48,763 INFO L85 PathProgramCache]: Analyzing trace with hash -927408166, now seen corresponding path program 24 times [2024-06-21 20:33:48,763 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:33:48,763 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1006440589] [2024-06-21 20:33:48,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:33:48,763 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:33:48,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:33:49,804 INFO 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 20:33:49,805 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:33:49,805 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1006440589] [2024-06-21 20:33:49,805 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1006440589] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:33:49,805 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:33:49,805 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 20:33:49,805 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1677124772] [2024-06-21 20:33:49,805 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:33:49,805 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 20:33:49,805 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:33:49,805 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 20:33:49,805 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=62, Unknown=0, NotChecked=0, Total=110 [2024-06-21 20:33:49,917 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-21 20:33:49,918 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 343 places, 877 transitions, 16607 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 20:33:49,918 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:33:49,918 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-21 20:33:49,918 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:33:52,546 INFO L124 PetriNetUnfolderBase]: 5969/9508 cut-off events. [2024-06-21 20:33:52,546 INFO L125 PetriNetUnfolderBase]: For 874986/874991 co-relation queries the response was YES. [2024-06-21 20:33:52,639 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81308 conditions, 9508 events. 5969/9508 cut-off events. For 874986/874991 co-relation queries the response was YES. Maximal size of possible extension queue 614. Compared 62473 event pairs, 1209 based on Foata normal form. 10/9515 useless extension candidates. Maximal degree in co-relation 81170. Up to 5255 conditions per place. [2024-06-21 20:33:52,685 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 259 selfloop transitions, 691 changer transitions 0/955 dead transitions. [2024-06-21 20:33:52,686 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 352 places, 955 transitions, 20147 flow [2024-06-21 20:33:52,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 20:33:52,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 20:33:52,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 211 transitions. [2024-06-21 20:33:52,686 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47954545454545455 [2024-06-21 20:33:52,687 INFO L175 Difference]: Start difference. First operand has 343 places, 877 transitions, 16607 flow. Second operand 10 states and 211 transitions. [2024-06-21 20:33:52,687 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 352 places, 955 transitions, 20147 flow [2024-06-21 20:33:54,519 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 340 places, 955 transitions, 18541 flow, removed 34 selfloop flow, removed 12 redundant places. [2024-06-21 20:33:54,531 INFO L231 Difference]: Finished difference. Result has 341 places, 895 transitions, 16976 flow [2024-06-21 20:33:54,532 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=15061, PETRI_DIFFERENCE_MINUEND_PLACES=331, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=877, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=673, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=204, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=16976, PETRI_PLACES=341, PETRI_TRANSITIONS=895} [2024-06-21 20:33:54,532 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 296 predicate places. [2024-06-21 20:33:54,532 INFO L495 AbstractCegarLoop]: Abstraction has has 341 places, 895 transitions, 16976 flow [2024-06-21 20:33:54,532 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 20:33:54,532 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:33:54,532 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:33:54,533 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2024-06-21 20:33:54,533 INFO L420 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:33:54,533 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:33:54,533 INFO L85 PathProgramCache]: Analyzing trace with hash -1614170264, now seen corresponding path program 25 times [2024-06-21 20:33:54,533 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:33:54,533 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1638427976] [2024-06-21 20:33:54,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:33:54,533 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:33:54,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:33:55,539 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:33:55,539 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:33:55,539 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1638427976] [2024-06-21 20:33:55,539 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1638427976] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:33:55,539 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:33:55,540 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 20:33:55,540 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1190314137] [2024-06-21 20:33:55,540 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:33:55,540 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 20:33:55,540 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:33:55,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 20:33:55,540 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=62, Unknown=0, NotChecked=0, Total=110 [2024-06-21 20:33:55,631 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-21 20:33:55,631 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 341 places, 895 transitions, 16976 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 20:33:55,631 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:33:55,631 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-21 20:33:55,631 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:33:58,263 INFO L124 PetriNetUnfolderBase]: 6019/9576 cut-off events. [2024-06-21 20:33:58,263 INFO L125 PetriNetUnfolderBase]: For 837855/837860 co-relation queries the response was YES. [2024-06-21 20:33:58,352 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81136 conditions, 9576 events. 6019/9576 cut-off events. For 837855/837860 co-relation queries the response was YES. Maximal size of possible extension queue 622. Compared 62791 event pairs, 1258 based on Foata normal form. 10/9583 useless extension candidates. Maximal degree in co-relation 81000. Up to 5300 conditions per place. [2024-06-21 20:33:58,399 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 278 selfloop transitions, 676 changer transitions 0/959 dead transitions. [2024-06-21 20:33:58,399 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 350 places, 959 transitions, 20149 flow [2024-06-21 20:33:58,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 20:33:58,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 20:33:58,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 214 transitions. [2024-06-21 20:33:58,400 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4863636363636364 [2024-06-21 20:33:58,400 INFO L175 Difference]: Start difference. First operand has 341 places, 895 transitions, 16976 flow. Second operand 10 states and 214 transitions. [2024-06-21 20:33:58,400 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 350 places, 959 transitions, 20149 flow [2024-06-21 20:34:00,299 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 342 places, 959 transitions, 19081 flow, removed 99 selfloop flow, removed 8 redundant places. [2024-06-21 20:34:00,312 INFO L231 Difference]: Finished difference. Result has 343 places, 904 transitions, 17578 flow [2024-06-21 20:34:00,313 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=15951, PETRI_DIFFERENCE_MINUEND_PLACES=333, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=895, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=667, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=228, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=17578, PETRI_PLACES=343, PETRI_TRANSITIONS=904} [2024-06-21 20:34:00,313 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 298 predicate places. [2024-06-21 20:34:00,313 INFO L495 AbstractCegarLoop]: Abstraction has has 343 places, 904 transitions, 17578 flow [2024-06-21 20:34:00,313 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 20:34:00,313 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:34:00,313 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:34:00,314 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2024-06-21 20:34:00,314 INFO L420 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:34:00,314 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:34:00,314 INFO L85 PathProgramCache]: Analyzing trace with hash 1822511568, now seen corresponding path program 26 times [2024-06-21 20:34:00,314 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:34:00,314 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [628991180] [2024-06-21 20:34:00,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:34:00,314 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:34:00,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:34:01,294 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:34:01,294 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:34:01,294 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [628991180] [2024-06-21 20:34:01,294 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [628991180] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:34:01,294 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:34:01,294 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 20:34:01,294 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1995784974] [2024-06-21 20:34:01,294 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:34:01,294 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 20:34:01,294 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:34:01,295 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 20:34:01,295 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=62, Unknown=0, NotChecked=0, Total=110 [2024-06-21 20:34:01,408 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-21 20:34:01,409 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 343 places, 904 transitions, 17578 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 20:34:01,409 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:34:01,409 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-21 20:34:01,409 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:34:03,966 INFO L124 PetriNetUnfolderBase]: 5997/9556 cut-off events. [2024-06-21 20:34:03,966 INFO L125 PetriNetUnfolderBase]: For 815198/815203 co-relation queries the response was YES. [2024-06-21 20:34:04,057 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79926 conditions, 9556 events. 5997/9556 cut-off events. For 815198/815203 co-relation queries the response was YES. Maximal size of possible extension queue 621. Compared 62802 event pairs, 1245 based on Foata normal form. 10/9563 useless extension candidates. Maximal degree in co-relation 79791. Up to 5282 conditions per place. [2024-06-21 20:34:04,104 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 272 selfloop transitions, 680 changer transitions 0/957 dead transitions. [2024-06-21 20:34:04,104 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 352 places, 957 transitions, 20224 flow [2024-06-21 20:34:04,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 20:34:04,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 20:34:04,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 211 transitions. [2024-06-21 20:34:04,105 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47954545454545455 [2024-06-21 20:34:04,105 INFO L175 Difference]: Start difference. First operand has 343 places, 904 transitions, 17578 flow. Second operand 10 states and 211 transitions. [2024-06-21 20:34:04,105 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 352 places, 957 transitions, 20224 flow [2024-06-21 20:34:05,911 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 342 places, 957 transitions, 18438 flow, removed 122 selfloop flow, removed 10 redundant places. [2024-06-21 20:34:05,925 INFO L231 Difference]: Finished difference. Result has 343 places, 904 transitions, 17195 flow [2024-06-21 20:34:05,926 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=15800, PETRI_DIFFERENCE_MINUEND_PLACES=333, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=904, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=680, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=224, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=17195, PETRI_PLACES=343, PETRI_TRANSITIONS=904} [2024-06-21 20:34:05,926 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 298 predicate places. [2024-06-21 20:34:05,926 INFO L495 AbstractCegarLoop]: Abstraction has has 343 places, 904 transitions, 17195 flow [2024-06-21 20:34:05,926 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 20:34:05,927 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:34:05,927 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:34:05,927 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2024-06-21 20:34:05,927 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 20:34:05,927 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:34:05,927 INFO L85 PathProgramCache]: Analyzing trace with hash -986098684, now seen corresponding path program 4 times [2024-06-21 20:34:05,927 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:34:05,927 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1389791604] [2024-06-21 20:34:05,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:34:05,927 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:34:05,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:34:06,852 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 20:34:06,852 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:34:06,852 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1389791604] [2024-06-21 20:34:06,852 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1389791604] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:34:06,853 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:34:06,853 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:34:06,853 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1769245765] [2024-06-21 20:34:06,853 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:34:06,853 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:34:06,853 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:34:06,853 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:34:06,853 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:34:06,943 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-21 20:34:06,944 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 343 places, 904 transitions, 17195 flow. Second operand has 9 states, 9 states have (on average 13.555555555555555) internal successors, (122), 9 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:34:06,944 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:34:06,944 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-21 20:34:06,944 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:34:08,863 INFO L124 PetriNetUnfolderBase]: 5023/8066 cut-off events. [2024-06-21 20:34:08,863 INFO L125 PetriNetUnfolderBase]: For 846431/846907 co-relation queries the response was YES. [2024-06-21 20:34:08,941 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70895 conditions, 8066 events. 5023/8066 cut-off events. For 846431/846907 co-relation queries the response was YES. Maximal size of possible extension queue 551. Compared 52526 event pairs, 1346 based on Foata normal form. 58/7930 useless extension candidates. Maximal degree in co-relation 70761. Up to 6714 conditions per place. [2024-06-21 20:34:08,982 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 778 selfloop transitions, 36 changer transitions 0/926 dead transitions. [2024-06-21 20:34:08,982 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 349 places, 926 transitions, 18981 flow [2024-06-21 20:34:08,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:34:08,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:34:08,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 146 transitions. [2024-06-21 20:34:08,982 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.474025974025974 [2024-06-21 20:34:08,983 INFO L175 Difference]: Start difference. First operand has 343 places, 904 transitions, 17195 flow. Second operand 7 states and 146 transitions. [2024-06-21 20:34:08,983 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 349 places, 926 transitions, 18981 flow [2024-06-21 20:34:10,634 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 339 places, 926 transitions, 17821 flow, removed 10 selfloop flow, removed 10 redundant places. [2024-06-21 20:34:10,647 INFO L231 Difference]: Finished difference. Result has 340 places, 907 transitions, 16191 flow [2024-06-21 20:34:10,648 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=16035, PETRI_DIFFERENCE_MINUEND_PLACES=333, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=904, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=868, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=16191, PETRI_PLACES=340, PETRI_TRANSITIONS=907} [2024-06-21 20:34:10,648 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 295 predicate places. [2024-06-21 20:34:10,648 INFO L495 AbstractCegarLoop]: Abstraction has has 340 places, 907 transitions, 16191 flow [2024-06-21 20:34:10,648 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.555555555555555) internal successors, (122), 9 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:34:10,648 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:34:10,648 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:34:10,648 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2024-06-21 20:34:10,649 INFO L420 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:34:10,649 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:34:10,649 INFO L85 PathProgramCache]: Analyzing trace with hash -1412602157, now seen corresponding path program 2 times [2024-06-21 20:34:10,649 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:34:10,649 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1622098907] [2024-06-21 20:34:10,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:34:10,649 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:34:10,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:34:11,706 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:34:11,706 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:34:11,706 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1622098907] [2024-06-21 20:34:11,706 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1622098907] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:34:11,706 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:34:11,706 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:34:11,706 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [146865340] [2024-06-21 20:34:11,706 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:34:11,707 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:34:11,707 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:34:11,707 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:34:11,707 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:34:11,807 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-21 20:34:11,807 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 340 places, 907 transitions, 16191 flow. Second operand has 10 states, 10 states have (on average 12.3) internal successors, (123), 10 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:34:11,807 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:34:11,807 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-21 20:34:11,807 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:34:14,108 INFO L124 PetriNetUnfolderBase]: 5680/9140 cut-off events. [2024-06-21 20:34:14,109 INFO L125 PetriNetUnfolderBase]: For 782180/782251 co-relation queries the response was YES. [2024-06-21 20:34:14,194 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73470 conditions, 9140 events. 5680/9140 cut-off events. For 782180/782251 co-relation queries the response was YES. Maximal size of possible extension queue 630. Compared 60968 event pairs, 1678 based on Foata normal form. 71/9101 useless extension candidates. Maximal degree in co-relation 73337. Up to 7867 conditions per place. [2024-06-21 20:34:14,238 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 829 selfloop transitions, 64 changer transitions 0/947 dead transitions. [2024-06-21 20:34:14,238 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 348 places, 947 transitions, 18304 flow [2024-06-21 20:34:14,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:34:14,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:34:14,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 183 transitions. [2024-06-21 20:34:14,239 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4621212121212121 [2024-06-21 20:34:14,239 INFO L175 Difference]: Start difference. First operand has 340 places, 907 transitions, 16191 flow. Second operand 9 states and 183 transitions. [2024-06-21 20:34:14,239 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 348 places, 947 transitions, 18304 flow [2024-06-21 20:34:15,505 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 343 places, 947 transitions, 18190 flow, removed 29 selfloop flow, removed 5 redundant places. [2024-06-21 20:34:15,517 INFO L231 Difference]: Finished difference. Result has 345 places, 914 transitions, 16348 flow [2024-06-21 20:34:15,518 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=16077, PETRI_DIFFERENCE_MINUEND_PLACES=335, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=907, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=847, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=16348, PETRI_PLACES=345, PETRI_TRANSITIONS=914} [2024-06-21 20:34:15,518 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 300 predicate places. [2024-06-21 20:34:15,518 INFO L495 AbstractCegarLoop]: Abstraction has has 345 places, 914 transitions, 16348 flow [2024-06-21 20:34:15,518 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.3) internal successors, (123), 10 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:34:15,518 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:34:15,518 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:34:15,518 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2024-06-21 20:34:15,519 INFO L420 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:34:15,519 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:34:15,519 INFO L85 PathProgramCache]: Analyzing trace with hash 406751838, now seen corresponding path program 27 times [2024-06-21 20:34:15,519 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:34:15,519 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [527900411] [2024-06-21 20:34:15,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:34:15,519 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:34:15,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:34:16,508 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:34:16,509 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:34:16,509 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [527900411] [2024-06-21 20:34:16,509 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [527900411] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:34:16,509 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:34:16,509 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 20:34:16,509 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1957068996] [2024-06-21 20:34:16,509 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:34:16,509 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 20:34:16,509 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:34:16,509 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 20:34:16,510 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=62, Unknown=0, NotChecked=0, Total=110 [2024-06-21 20:34:16,627 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-21 20:34:16,627 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 345 places, 914 transitions, 16348 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 20:34:16,628 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:34:16,628 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-21 20:34:16,628 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:34:19,317 INFO L124 PetriNetUnfolderBase]: 6175/9865 cut-off events. [2024-06-21 20:34:19,317 INFO L125 PetriNetUnfolderBase]: For 778408/778411 co-relation queries the response was YES. [2024-06-21 20:34:19,414 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79517 conditions, 9865 events. 6175/9865 cut-off events. For 778408/778411 co-relation queries the response was YES. Maximal size of possible extension queue 646. Compared 65408 event pairs, 1142 based on Foata normal form. 10/9872 useless extension candidates. Maximal degree in co-relation 79382. Up to 5455 conditions per place. [2024-06-21 20:34:19,462 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 263 selfloop transitions, 727 changer transitions 0/995 dead transitions. [2024-06-21 20:34:19,462 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 354 places, 995 transitions, 20088 flow [2024-06-21 20:34:19,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 20:34:19,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 20:34:19,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 209 transitions. [2024-06-21 20:34:19,463 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.475 [2024-06-21 20:34:19,463 INFO L175 Difference]: Start difference. First operand has 345 places, 914 transitions, 16348 flow. Second operand 10 states and 209 transitions. [2024-06-21 20:34:19,463 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 354 places, 995 transitions, 20088 flow [2024-06-21 20:34:21,010 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 348 places, 995 transitions, 19893 flow, removed 39 selfloop flow, removed 6 redundant places. [2024-06-21 20:34:21,024 INFO L231 Difference]: Finished difference. Result has 349 places, 938 transitions, 18368 flow [2024-06-21 20:34:21,025 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=16171, PETRI_DIFFERENCE_MINUEND_PLACES=339, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=914, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=703, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=211, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=18368, PETRI_PLACES=349, PETRI_TRANSITIONS=938} [2024-06-21 20:34:21,025 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 304 predicate places. [2024-06-21 20:34:21,025 INFO L495 AbstractCegarLoop]: Abstraction has has 349 places, 938 transitions, 18368 flow [2024-06-21 20:34:21,025 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 20:34:21,025 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:34:21,026 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:34:21,026 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2024-06-21 20:34:21,026 INFO L420 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:34:21,026 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:34:21,026 INFO L85 PathProgramCache]: Analyzing trace with hash 465988082, now seen corresponding path program 28 times [2024-06-21 20:34:21,026 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:34:21,026 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [511689097] [2024-06-21 20:34:21,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:34:21,026 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:34:21,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:34:22,029 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:34:22,029 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:34:22,029 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [511689097] [2024-06-21 20:34:22,029 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [511689097] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:34:22,029 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:34:22,029 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 20:34:22,030 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1460080828] [2024-06-21 20:34:22,030 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:34:22,030 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 20:34:22,030 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:34:22,030 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 20:34:22,030 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=62, Unknown=0, NotChecked=0, Total=110 [2024-06-21 20:34:22,149 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-21 20:34:22,149 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 349 places, 938 transitions, 18368 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 20:34:22,150 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:34:22,150 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-21 20:34:22,150 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:34:24,920 INFO L124 PetriNetUnfolderBase]: 6331/10106 cut-off events. [2024-06-21 20:34:24,920 INFO L125 PetriNetUnfolderBase]: For 841928/841931 co-relation queries the response was YES. [2024-06-21 20:34:25,034 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84134 conditions, 10106 events. 6331/10106 cut-off events. For 841928/841931 co-relation queries the response was YES. Maximal size of possible extension queue 673. Compared 67095 event pairs, 1231 based on Foata normal form. 10/10113 useless extension candidates. Maximal degree in co-relation 83998. Up to 5594 conditions per place. [2024-06-21 20:34:25,086 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 292 selfloop transitions, 719 changer transitions 0/1016 dead transitions. [2024-06-21 20:34:25,087 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 358 places, 1016 transitions, 22337 flow [2024-06-21 20:34:25,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 20:34:25,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 20:34:25,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 214 transitions. [2024-06-21 20:34:25,087 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4863636363636364 [2024-06-21 20:34:25,088 INFO L175 Difference]: Start difference. First operand has 349 places, 938 transitions, 18368 flow. Second operand 10 states and 214 transitions. [2024-06-21 20:34:25,088 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 358 places, 1016 transitions, 22337 flow [2024-06-21 20:34:27,176 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 352 places, 1016 transitions, 21167 flow, removed 136 selfloop flow, removed 6 redundant places. [2024-06-21 20:34:27,190 INFO L231 Difference]: Finished difference. Result has 353 places, 962 transitions, 19439 flow [2024-06-21 20:34:27,191 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=17282, PETRI_DIFFERENCE_MINUEND_PLACES=343, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=938, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=695, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=243, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=19439, PETRI_PLACES=353, PETRI_TRANSITIONS=962} [2024-06-21 20:34:27,191 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 308 predicate places. [2024-06-21 20:34:27,191 INFO L495 AbstractCegarLoop]: Abstraction has has 353 places, 962 transitions, 19439 flow [2024-06-21 20:34:27,191 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 20:34:27,192 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:34:27,192 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:34:27,192 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2024-06-21 20:34:27,192 INFO L420 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:34:27,192 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:34:27,192 INFO L85 PathProgramCache]: Analyzing trace with hash -1420236434, now seen corresponding path program 29 times [2024-06-21 20:34:27,192 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:34:27,192 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [81126161] [2024-06-21 20:34:27,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:34:27,192 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:34:27,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:34:28,202 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 20:34:28,202 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:34:28,202 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [81126161] [2024-06-21 20:34:28,202 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [81126161] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:34:28,202 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:34:28,202 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 20:34:28,202 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1963894891] [2024-06-21 20:34:28,202 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:34:28,202 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 20:34:28,202 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:34:28,203 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 20:34:28,203 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=62, Unknown=0, NotChecked=0, Total=110 [2024-06-21 20:34:28,297 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-21 20:34:28,297 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 353 places, 962 transitions, 19439 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 20:34:28,298 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:34:28,298 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-21 20:34:28,298 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:34:31,063 INFO L124 PetriNetUnfolderBase]: 6303/10079 cut-off events. [2024-06-21 20:34:31,063 INFO L125 PetriNetUnfolderBase]: For 835530/835533 co-relation queries the response was YES. [2024-06-21 20:34:31,160 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82838 conditions, 10079 events. 6303/10079 cut-off events. For 835530/835533 co-relation queries the response was YES. Maximal size of possible extension queue 673. Compared 67085 event pairs, 1189 based on Foata normal form. 10/10086 useless extension candidates. Maximal degree in co-relation 82702. Up to 5571 conditions per place. [2024-06-21 20:34:31,210 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 286 selfloop transitions, 723 changer transitions 0/1014 dead transitions. [2024-06-21 20:34:31,210 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 362 places, 1014 transitions, 22402 flow [2024-06-21 20:34:31,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 20:34:31,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 20:34:31,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 211 transitions. [2024-06-21 20:34:31,211 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47954545454545455 [2024-06-21 20:34:31,211 INFO L175 Difference]: Start difference. First operand has 353 places, 962 transitions, 19439 flow. Second operand 10 states and 211 transitions. [2024-06-21 20:34:31,211 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 362 places, 1014 transitions, 22402 flow [2024-06-21 20:34:32,806 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 356 places, 1014 transitions, 20939 flow, removed 170 selfloop flow, removed 6 redundant places. [2024-06-21 20:34:32,821 INFO L231 Difference]: Finished difference. Result has 357 places, 962 transitions, 19457 flow [2024-06-21 20:34:32,821 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=17984, PETRI_DIFFERENCE_MINUEND_PLACES=347, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=962, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=723, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=239, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=19457, PETRI_PLACES=357, PETRI_TRANSITIONS=962} [2024-06-21 20:34:32,822 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 312 predicate places. [2024-06-21 20:34:32,822 INFO L495 AbstractCegarLoop]: Abstraction has has 357 places, 962 transitions, 19457 flow [2024-06-21 20:34:32,822 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 20:34:32,822 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:34:32,822 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:34:32,822 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2024-06-21 20:34:32,822 INFO L420 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:34:32,822 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:34:32,822 INFO L85 PathProgramCache]: Analyzing trace with hash -1420029044, now seen corresponding path program 30 times [2024-06-21 20:34:32,823 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:34:32,823 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1315486372] [2024-06-21 20:34:32,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:34:32,823 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:34:32,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:34:33,810 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:34:33,810 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:34:33,810 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1315486372] [2024-06-21 20:34:33,810 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1315486372] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:34:33,810 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:34:33,810 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 20:34:33,810 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1060805350] [2024-06-21 20:34:33,811 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:34:33,811 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 20:34:33,811 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:34:33,811 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 20:34:33,811 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=62, Unknown=0, NotChecked=0, Total=110 [2024-06-21 20:34:33,932 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-21 20:34:33,932 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 357 places, 962 transitions, 19457 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 20:34:33,932 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:34:33,932 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-21 20:34:33,932 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:34:36,990 INFO L124 PetriNetUnfolderBase]: 6275/10042 cut-off events. [2024-06-21 20:34:36,990 INFO L125 PetriNetUnfolderBase]: For 817053/817056 co-relation queries the response was YES. [2024-06-21 20:34:37,092 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81523 conditions, 10042 events. 6275/10042 cut-off events. For 817053/817056 co-relation queries the response was YES. Maximal size of possible extension queue 673. Compared 66980 event pairs, 1329 based on Foata normal form. 10/10049 useless extension candidates. Maximal degree in co-relation 81387. Up to 5548 conditions per place. [2024-06-21 20:34:37,145 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 298 selfloop transitions, 713 changer transitions 0/1016 dead transitions. [2024-06-21 20:34:37,146 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 366 places, 1016 transitions, 22284 flow [2024-06-21 20:34:37,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 20:34:37,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 20:34:37,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 211 transitions. [2024-06-21 20:34:37,147 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47954545454545455 [2024-06-21 20:34:37,147 INFO L175 Difference]: Start difference. First operand has 357 places, 962 transitions, 19457 flow. Second operand 10 states and 211 transitions. [2024-06-21 20:34:37,147 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 366 places, 1016 transitions, 22284 flow [2024-06-21 20:34:39,041 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 357 places, 1016 transitions, 20737 flow, removed 80 selfloop flow, removed 9 redundant places. [2024-06-21 20:34:39,058 INFO L231 Difference]: Finished difference. Result has 358 places, 962 transitions, 19367 flow [2024-06-21 20:34:39,058 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=17914, PETRI_DIFFERENCE_MINUEND_PLACES=348, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=962, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=713, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=249, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=19367, PETRI_PLACES=358, PETRI_TRANSITIONS=962} [2024-06-21 20:34:39,059 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 313 predicate places. [2024-06-21 20:34:39,059 INFO L495 AbstractCegarLoop]: Abstraction has has 358 places, 962 transitions, 19367 flow [2024-06-21 20:34:39,059 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 20:34:39,059 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:34:39,060 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:34:39,060 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2024-06-21 20:34:39,060 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 20:34:39,060 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:34:39,060 INFO L85 PathProgramCache]: Analyzing trace with hash -648375186, now seen corresponding path program 5 times [2024-06-21 20:34:39,060 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:34:39,061 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1253088346] [2024-06-21 20:34:39,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:34:39,061 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:34:39,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:34:40,046 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:34:40,046 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:34:40,046 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1253088346] [2024-06-21 20:34:40,046 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1253088346] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:34:40,046 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:34:40,046 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:34:40,046 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2048306024] [2024-06-21 20:34:40,046 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:34:40,046 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:34:40,047 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:34:40,047 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:34:40,047 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:34:40,195 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-21 20:34:40,195 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 358 places, 962 transitions, 19367 flow. Second operand has 9 states, 9 states have (on average 13.555555555555555) internal successors, (122), 9 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:34:40,195 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:34:40,196 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-21 20:34:40,196 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:34:42,248 INFO L124 PetriNetUnfolderBase]: 5286/8547 cut-off events. [2024-06-21 20:34:42,248 INFO L125 PetriNetUnfolderBase]: For 876617/877186 co-relation queries the response was YES. [2024-06-21 20:34:42,337 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73504 conditions, 8547 events. 5286/8547 cut-off events. For 876617/877186 co-relation queries the response was YES. Maximal size of possible extension queue 583. Compared 56715 event pairs, 1050 based on Foata normal form. 53/8396 useless extension candidates. Maximal degree in co-relation 73368. Up to 7052 conditions per place. [2024-06-21 20:34:42,383 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 834 selfloop transitions, 54 changer transitions 0/1000 dead transitions. [2024-06-21 20:34:42,383 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 365 places, 1000 transitions, 21592 flow [2024-06-21 20:34:42,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:34:42,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:34:42,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 157 transitions. [2024-06-21 20:34:42,384 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4460227272727273 [2024-06-21 20:34:42,384 INFO L175 Difference]: Start difference. First operand has 358 places, 962 transitions, 19367 flow. Second operand 8 states and 157 transitions. [2024-06-21 20:34:42,384 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 365 places, 1000 transitions, 21592 flow [2024-06-21 20:34:44,182 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 353 places, 1000 transitions, 19547 flow, removed 2 selfloop flow, removed 12 redundant places. [2024-06-21 20:34:44,195 INFO L231 Difference]: Finished difference. Result has 355 places, 986 transitions, 17850 flow [2024-06-21 20:34:44,196 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=17334, PETRI_DIFFERENCE_MINUEND_PLACES=346, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=962, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=917, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=17850, PETRI_PLACES=355, PETRI_TRANSITIONS=986} [2024-06-21 20:34:44,197 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 310 predicate places. [2024-06-21 20:34:44,197 INFO L495 AbstractCegarLoop]: Abstraction has has 355 places, 986 transitions, 17850 flow [2024-06-21 20:34:44,197 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.555555555555555) internal successors, (122), 9 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:34:44,197 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:34:44,197 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:34:44,197 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2024-06-21 20:34:44,198 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 20:34:44,198 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:34:44,198 INFO L85 PathProgramCache]: Analyzing trace with hash -1076471391, now seen corresponding path program 2 times [2024-06-21 20:34:44,198 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:34:44,198 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [522712759] [2024-06-21 20:34:44,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:34:44,199 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:34:44,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:34:45,225 INFO 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 20:34:45,225 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:34:45,226 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [522712759] [2024-06-21 20:34:45,226 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [522712759] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:34:45,226 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:34:45,226 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:34:45,226 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1749272976] [2024-06-21 20:34:45,226 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:34:45,226 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:34:45,226 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:34:45,226 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:34:45,226 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:34:45,385 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 44 [2024-06-21 20:34:45,386 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 355 places, 986 transitions, 17850 flow. Second operand has 8 states, 8 states have (on average 14.75) internal successors, (118), 8 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:34:45,386 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:34:45,386 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 44 [2024-06-21 20:34:45,386 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:34:47,117 INFO L124 PetriNetUnfolderBase]: 4903/7794 cut-off events. [2024-06-21 20:34:47,117 INFO L125 PetriNetUnfolderBase]: For 862669/863272 co-relation queries the response was YES. [2024-06-21 20:34:47,192 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65935 conditions, 7794 events. 4903/7794 cut-off events. For 862669/863272 co-relation queries the response was YES. Maximal size of possible extension queue 530. Compared 49782 event pairs, 1169 based on Foata normal form. 103/7441 useless extension candidates. Maximal degree in co-relation 65798. Up to 6418 conditions per place. [2024-06-21 20:34:47,231 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 806 selfloop transitions, 29 changer transitions 0/1003 dead transitions. [2024-06-21 20:34:47,231 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 361 places, 1003 transitions, 19636 flow [2024-06-21 20:34:47,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:34:47,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:34:47,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 146 transitions. [2024-06-21 20:34:47,232 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.474025974025974 [2024-06-21 20:34:47,232 INFO L175 Difference]: Start difference. First operand has 355 places, 986 transitions, 17850 flow. Second operand 7 states and 146 transitions. [2024-06-21 20:34:47,232 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 361 places, 1003 transitions, 19636 flow [2024-06-21 20:34:48,656 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 359 places, 1003 transitions, 19550 flow, removed 21 selfloop flow, removed 2 redundant places. [2024-06-21 20:34:48,673 INFO L231 Difference]: Finished difference. Result has 360 places, 989 transitions, 17887 flow [2024-06-21 20:34:48,674 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=17764, PETRI_DIFFERENCE_MINUEND_PLACES=353, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=986, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=957, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=17887, PETRI_PLACES=360, PETRI_TRANSITIONS=989} [2024-06-21 20:34:48,674 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 315 predicate places. [2024-06-21 20:34:48,674 INFO L495 AbstractCegarLoop]: Abstraction has has 360 places, 989 transitions, 17887 flow [2024-06-21 20:34:48,674 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.75) internal successors, (118), 8 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:34:48,674 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:34:48,675 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:34:48,675 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2024-06-21 20:34:48,675 INFO L420 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:34:48,675 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:34:48,675 INFO L85 PathProgramCache]: Analyzing trace with hash 1519672977, now seen corresponding path program 3 times [2024-06-21 20:34:48,675 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:34:48,676 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2111096648] [2024-06-21 20:34:48,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:34:48,676 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:34:48,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:34:49,894 INFO 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 20:34:49,895 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:34:49,895 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2111096648] [2024-06-21 20:34:49,895 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2111096648] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:34:49,895 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:34:49,895 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:34:49,895 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [631299490] [2024-06-21 20:34:49,895 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:34:49,895 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:34:49,895 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:34:49,895 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:34:49,895 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:34:50,012 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-21 20:34:50,012 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 360 places, 989 transitions, 17887 flow. Second operand has 10 states, 10 states have (on average 12.3) internal successors, (123), 10 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:34:50,012 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:34:50,013 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-21 20:34:50,013 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:34:52,796 INFO L124 PetriNetUnfolderBase]: 6019/9732 cut-off events. [2024-06-21 20:34:52,797 INFO L125 PetriNetUnfolderBase]: For 819550/819634 co-relation queries the response was YES. [2024-06-21 20:34:52,876 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76633 conditions, 9732 events. 6019/9732 cut-off events. For 819550/819634 co-relation queries the response was YES. Maximal size of possible extension queue 684. Compared 66234 event pairs, 1738 based on Foata normal form. 82/9696 useless extension candidates. Maximal degree in co-relation 76494. Up to 8353 conditions per place. [2024-06-21 20:34:52,918 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 893 selfloop transitions, 80 changer transitions 0/1034 dead transitions. [2024-06-21 20:34:52,919 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 368 places, 1034 transitions, 20263 flow [2024-06-21 20:34:52,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:34:52,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:34:52,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 178 transitions. [2024-06-21 20:34:52,919 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4494949494949495 [2024-06-21 20:34:52,919 INFO L175 Difference]: Start difference. First operand has 360 places, 989 transitions, 17887 flow. Second operand 9 states and 178 transitions. [2024-06-21 20:34:52,919 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 368 places, 1034 transitions, 20263 flow [2024-06-21 20:34:54,306 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 363 places, 1034 transitions, 20168 flow, removed 23 selfloop flow, removed 5 redundant places. [2024-06-21 20:34:54,319 INFO L231 Difference]: Finished difference. Result has 365 places, 1006 transitions, 18253 flow [2024-06-21 20:34:54,320 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=17794, PETRI_DIFFERENCE_MINUEND_PLACES=355, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=989, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=923, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=18253, PETRI_PLACES=365, PETRI_TRANSITIONS=1006} [2024-06-21 20:34:54,320 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 320 predicate places. [2024-06-21 20:34:54,320 INFO L495 AbstractCegarLoop]: Abstraction has has 365 places, 1006 transitions, 18253 flow [2024-06-21 20:34:54,320 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.3) internal successors, (123), 10 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:34:54,320 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:34:54,320 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:34:54,320 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2024-06-21 20:34:54,320 INFO L420 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:34:54,320 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:34:54,320 INFO L85 PathProgramCache]: Analyzing trace with hash 1531100817, now seen corresponding path program 4 times [2024-06-21 20:34:54,321 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:34:54,321 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1941939665] [2024-06-21 20:34:54,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:34:54,321 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:34:54,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:34:55,442 INFO 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 20:34:55,443 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:34:55,443 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1941939665] [2024-06-21 20:34:55,443 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1941939665] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:34:55,443 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:34:55,443 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:34:55,443 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1362233770] [2024-06-21 20:34:55,443 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:34:55,443 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:34:55,443 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:34:55,443 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:34:55,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:34:55,572 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-21 20:34:55,573 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 365 places, 1006 transitions, 18253 flow. Second operand has 10 states, 10 states have (on average 12.3) internal successors, (123), 10 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:34:55,573 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:34:55,573 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-21 20:34:55,573 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:34:58,161 INFO L124 PetriNetUnfolderBase]: 6036/9760 cut-off events. [2024-06-21 20:34:58,161 INFO L125 PetriNetUnfolderBase]: For 825820/825894 co-relation queries the response was YES. [2024-06-21 20:34:58,260 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77663 conditions, 9760 events. 6036/9760 cut-off events. For 825820/825894 co-relation queries the response was YES. Maximal size of possible extension queue 686. Compared 66481 event pairs, 1718 based on Foata normal form. 74/9705 useless extension candidates. Maximal degree in co-relation 77522. Up to 8265 conditions per place. [2024-06-21 20:34:58,309 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 891 selfloop transitions, 89 changer transitions 0/1041 dead transitions. [2024-06-21 20:34:58,309 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 373 places, 1041 transitions, 20750 flow [2024-06-21 20:34:58,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:34:58,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:34:58,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 181 transitions. [2024-06-21 20:34:58,310 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45707070707070707 [2024-06-21 20:34:58,310 INFO L175 Difference]: Start difference. First operand has 365 places, 1006 transitions, 18253 flow. Second operand 9 states and 181 transitions. [2024-06-21 20:34:58,310 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 373 places, 1041 transitions, 20750 flow [2024-06-21 20:34:59,873 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 369 places, 1041 transitions, 20598 flow, removed 28 selfloop flow, removed 4 redundant places. [2024-06-21 20:34:59,886 INFO L231 Difference]: Finished difference. Result has 370 places, 1010 transitions, 18410 flow [2024-06-21 20:34:59,887 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=18101, PETRI_DIFFERENCE_MINUEND_PLACES=361, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1006, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=87, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=919, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=18410, PETRI_PLACES=370, PETRI_TRANSITIONS=1010} [2024-06-21 20:34:59,887 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 325 predicate places. [2024-06-21 20:34:59,887 INFO L495 AbstractCegarLoop]: Abstraction has has 370 places, 1010 transitions, 18410 flow [2024-06-21 20:34:59,887 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.3) internal successors, (123), 10 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:34:59,887 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:34:59,888 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:34:59,888 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2024-06-21 20:34:59,888 INFO L420 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:34:59,888 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:34:59,888 INFO L85 PathProgramCache]: Analyzing trace with hash 1205973747, now seen corresponding path program 5 times [2024-06-21 20:34:59,888 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:34:59,888 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [787012823] [2024-06-21 20:34:59,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:34:59,889 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:34:59,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:35:00,932 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 20:35:00,932 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:35:00,932 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [787012823] [2024-06-21 20:35:00,932 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [787012823] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:35:00,932 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:35:00,932 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:35:00,932 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [479756838] [2024-06-21 20:35:00,932 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:35:00,932 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:35:00,932 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:35:00,933 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:35:00,933 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:35:01,035 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-21 20:35:01,036 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 370 places, 1010 transitions, 18410 flow. Second operand has 10 states, 10 states have (on average 12.3) internal successors, (123), 10 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:35:01,036 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:35:01,036 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-21 20:35:01,036 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:35:03,636 INFO L124 PetriNetUnfolderBase]: 6053/9785 cut-off events. [2024-06-21 20:35:03,636 INFO L125 PetriNetUnfolderBase]: For 845669/845747 co-relation queries the response was YES. [2024-06-21 20:35:03,732 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76849 conditions, 9785 events. 6053/9785 cut-off events. For 845669/845747 co-relation queries the response was YES. Maximal size of possible extension queue 691. Compared 66681 event pairs, 1767 based on Foata normal form. 78/9730 useless extension candidates. Maximal degree in co-relation 76707. Up to 8407 conditions per place. [2024-06-21 20:35:03,779 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 901 selfloop transitions, 78 changer transitions 0/1040 dead transitions. [2024-06-21 20:35:03,779 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 378 places, 1040 transitions, 20593 flow [2024-06-21 20:35:03,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:35:03,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:35:03,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 179 transitions. [2024-06-21 20:35:03,780 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45202020202020204 [2024-06-21 20:35:03,780 INFO L175 Difference]: Start difference. First operand has 370 places, 1010 transitions, 18410 flow. Second operand 9 states and 179 transitions. [2024-06-21 20:35:03,780 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 378 places, 1040 transitions, 20593 flow [2024-06-21 20:35:05,284 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 373 places, 1040 transitions, 20403 flow, removed 48 selfloop flow, removed 5 redundant places. [2024-06-21 20:35:05,298 INFO L231 Difference]: Finished difference. Result has 375 places, 1013 transitions, 18478 flow [2024-06-21 20:35:05,298 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=18242, PETRI_DIFFERENCE_MINUEND_PLACES=365, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1010, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=932, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=18478, PETRI_PLACES=375, PETRI_TRANSITIONS=1013} [2024-06-21 20:35:05,298 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 330 predicate places. [2024-06-21 20:35:05,299 INFO L495 AbstractCegarLoop]: Abstraction has has 375 places, 1013 transitions, 18478 flow [2024-06-21 20:35:05,299 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.3) internal successors, (123), 10 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:35:05,299 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:35:05,299 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:35:05,299 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2024-06-21 20:35:05,299 INFO L420 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:35:05,299 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:35:05,299 INFO L85 PathProgramCache]: Analyzing trace with hash 1205696700, now seen corresponding path program 31 times [2024-06-21 20:35:05,299 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:35:05,299 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1046299925] [2024-06-21 20:35:05,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:35:05,299 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:35:05,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:35:06,292 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 20:35:06,292 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:35:06,292 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1046299925] [2024-06-21 20:35:06,292 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1046299925] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:35:06,292 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:35:06,292 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 20:35:06,292 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1279880435] [2024-06-21 20:35:06,292 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:35:06,292 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 20:35:06,292 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:35:06,292 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 20:35:06,293 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=62, Unknown=0, NotChecked=0, Total=110 [2024-06-21 20:35:06,423 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-21 20:35:06,423 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 375 places, 1013 transitions, 18478 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 20:35:06,423 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:35:06,423 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-21 20:35:06,423 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:35:09,349 INFO L124 PetriNetUnfolderBase]: 6459/10342 cut-off events. [2024-06-21 20:35:09,349 INFO L125 PetriNetUnfolderBase]: For 836097/836106 co-relation queries the response was YES. [2024-06-21 20:35:09,462 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81176 conditions, 10342 events. 6459/10342 cut-off events. For 836097/836106 co-relation queries the response was YES. Maximal size of possible extension queue 686. Compared 69297 event pairs, 1112 based on Foata normal form. 10/10326 useless extension candidates. Maximal degree in co-relation 81031. Up to 5747 conditions per place. [2024-06-21 20:35:09,512 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 284 selfloop transitions, 780 changer transitions 0/1069 dead transitions. [2024-06-21 20:35:09,512 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 384 places, 1069 transitions, 21602 flow [2024-06-21 20:35:09,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 20:35:09,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 20:35:09,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 202 transitions. [2024-06-21 20:35:09,513 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4590909090909091 [2024-06-21 20:35:09,513 INFO L175 Difference]: Start difference. First operand has 375 places, 1013 transitions, 18478 flow. Second operand 10 states and 202 transitions. [2024-06-21 20:35:09,514 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 384 places, 1069 transitions, 21602 flow [2024-06-21 20:35:11,354 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 378 places, 1069 transitions, 21412 flow, removed 20 selfloop flow, removed 6 redundant places. [2024-06-21 20:35:11,368 INFO L231 Difference]: Finished difference. Result has 379 places, 1025 transitions, 20247 flow [2024-06-21 20:35:11,368 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=18288, PETRI_DIFFERENCE_MINUEND_PLACES=369, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1013, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=768, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=245, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=20247, PETRI_PLACES=379, PETRI_TRANSITIONS=1025} [2024-06-21 20:35:11,369 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 334 predicate places. [2024-06-21 20:35:11,369 INFO L495 AbstractCegarLoop]: Abstraction has has 379 places, 1025 transitions, 20247 flow [2024-06-21 20:35:11,369 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 20:35:11,369 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:35:11,369 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:35:11,369 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2024-06-21 20:35:11,369 INFO L420 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:35:11,369 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:35:11,369 INFO L85 PathProgramCache]: Analyzing trace with hash -1784013447, now seen corresponding path program 6 times [2024-06-21 20:35:11,369 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:35:11,369 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1951360623] [2024-06-21 20:35:11,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:35:11,369 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:35:11,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:35:12,613 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 20:35:12,613 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:35:12,613 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1951360623] [2024-06-21 20:35:12,613 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1951360623] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:35:12,613 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:35:12,613 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:35:12,613 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1545229440] [2024-06-21 20:35:12,613 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:35:12,614 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:35:12,614 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:35:12,614 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:35:12,614 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:35:12,723 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-21 20:35:12,724 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 379 places, 1025 transitions, 20247 flow. Second operand has 10 states, 10 states have (on average 12.3) internal successors, (123), 10 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:35:12,724 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:35:12,724 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-21 20:35:12,724 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:35:15,388 INFO L124 PetriNetUnfolderBase]: 6109/9896 cut-off events. [2024-06-21 20:35:15,388 INFO L125 PetriNetUnfolderBase]: For 911759/911836 co-relation queries the response was YES. [2024-06-21 20:35:15,498 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80943 conditions, 9896 events. 6109/9896 cut-off events. For 911759/911836 co-relation queries the response was YES. Maximal size of possible extension queue 708. Compared 67885 event pairs, 1800 based on Foata normal form. 77/9841 useless extension candidates. Maximal degree in co-relation 80797. Up to 8487 conditions per place. [2024-06-21 20:35:15,552 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 917 selfloop transitions, 75 changer transitions 0/1053 dead transitions. [2024-06-21 20:35:15,552 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 387 places, 1053 transitions, 22388 flow [2024-06-21 20:35:15,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:35:15,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:35:15,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 180 transitions. [2024-06-21 20:35:15,553 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45454545454545453 [2024-06-21 20:35:15,553 INFO L175 Difference]: Start difference. First operand has 379 places, 1025 transitions, 20247 flow. Second operand 9 states and 180 transitions. [2024-06-21 20:35:15,553 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 387 places, 1053 transitions, 22388 flow [2024-06-21 20:35:17,910 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 380 places, 1053 transitions, 21132 flow, removed 117 selfloop flow, removed 7 redundant places. [2024-06-21 20:35:17,923 INFO L231 Difference]: Finished difference. Result has 381 places, 1025 transitions, 19149 flow [2024-06-21 20:35:17,924 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=18991, PETRI_DIFFERENCE_MINUEND_PLACES=372, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1025, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=950, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=19149, PETRI_PLACES=381, PETRI_TRANSITIONS=1025} [2024-06-21 20:35:17,924 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 336 predicate places. [2024-06-21 20:35:17,924 INFO L495 AbstractCegarLoop]: Abstraction has has 381 places, 1025 transitions, 19149 flow [2024-06-21 20:35:17,924 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.3) internal successors, (123), 10 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:35:17,924 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:35:17,924 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:35:17,924 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2024-06-21 20:35:17,925 INFO L420 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:35:17,925 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:35:17,925 INFO L85 PathProgramCache]: Analyzing trace with hash 957535322, now seen corresponding path program 32 times [2024-06-21 20:35:17,925 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:35:17,925 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [7457494] [2024-06-21 20:35:17,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:35:17,926 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:35:17,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:35:18,922 INFO 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 20:35:18,922 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:35:18,922 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [7457494] [2024-06-21 20:35:18,922 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [7457494] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:35:18,922 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:35:18,922 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 20:35:18,922 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1338897032] [2024-06-21 20:35:18,922 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:35:18,923 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 20:35:18,923 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:35:18,923 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 20:35:18,923 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=62, Unknown=0, NotChecked=0, Total=110 [2024-06-21 20:35:19,031 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-21 20:35:19,031 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 381 places, 1025 transitions, 19149 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 20:35:19,031 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:35:19,031 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-21 20:35:19,031 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:35:22,297 INFO L124 PetriNetUnfolderBase]: 6515/10468 cut-off events. [2024-06-21 20:35:22,297 INFO L125 PetriNetUnfolderBase]: For 888315/888324 co-relation queries the response was YES. [2024-06-21 20:35:22,395 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81991 conditions, 10468 events. 6515/10468 cut-off events. For 888315/888324 co-relation queries the response was YES. Maximal size of possible extension queue 706. Compared 70703 event pairs, 1423 based on Foata normal form. 10/10452 useless extension candidates. Maximal degree in co-relation 81844. Up to 5793 conditions per place. [2024-06-21 20:35:22,452 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 335 selfloop transitions, 741 changer transitions 0/1081 dead transitions. [2024-06-21 20:35:22,452 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 390 places, 1081 transitions, 22286 flow [2024-06-21 20:35:22,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 20:35:22,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 20:35:22,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 207 transitions. [2024-06-21 20:35:22,454 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47045454545454546 [2024-06-21 20:35:22,454 INFO L175 Difference]: Start difference. First operand has 381 places, 1025 transitions, 19149 flow. Second operand 10 states and 207 transitions. [2024-06-21 20:35:22,455 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 390 places, 1081 transitions, 22286 flow [2024-06-21 20:35:24,368 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 379 places, 1081 transitions, 22043 flow, removed 10 selfloop flow, removed 11 redundant places. [2024-06-21 20:35:24,382 INFO L231 Difference]: Finished difference. Result has 380 places, 1037 transitions, 20775 flow [2024-06-21 20:35:24,383 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=18906, PETRI_DIFFERENCE_MINUEND_PLACES=370, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1025, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=729, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=296, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=20775, PETRI_PLACES=380, PETRI_TRANSITIONS=1037} [2024-06-21 20:35:24,383 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 335 predicate places. [2024-06-21 20:35:24,383 INFO L495 AbstractCegarLoop]: Abstraction has has 380 places, 1037 transitions, 20775 flow [2024-06-21 20:35:24,383 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 20:35:24,383 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:35:24,384 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:35:24,384 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2024-06-21 20:35:24,384 INFO L420 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:35:24,384 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:35:24,384 INFO L85 PathProgramCache]: Analyzing trace with hash -1791642144, now seen corresponding path program 33 times [2024-06-21 20:35:24,384 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:35:24,384 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1739566292] [2024-06-21 20:35:24,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:35:24,384 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:35:24,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:35:25,373 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 20:35:25,373 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:35:25,374 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1739566292] [2024-06-21 20:35:25,374 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1739566292] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:35:25,374 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:35:25,374 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 20:35:25,374 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [528296447] [2024-06-21 20:35:25,374 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:35:25,374 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 20:35:25,374 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:35:25,374 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 20:35:25,374 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=62, Unknown=0, NotChecked=0, Total=110 [2024-06-21 20:35:25,479 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-21 20:35:25,480 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 380 places, 1037 transitions, 20775 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 20:35:25,480 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:35:25,480 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-21 20:35:25,480 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:35:28,707 INFO L124 PetriNetUnfolderBase]: 6671/10726 cut-off events. [2024-06-21 20:35:28,707 INFO L125 PetriNetUnfolderBase]: For 985975/985984 co-relation queries the response was YES. [2024-06-21 20:35:28,806 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87557 conditions, 10726 events. 6671/10726 cut-off events. For 985975/985984 co-relation queries the response was YES. Maximal size of possible extension queue 729. Compared 72900 event pairs, 1347 based on Foata normal form. 10/10710 useless extension candidates. Maximal degree in co-relation 87412. Up to 5932 conditions per place. [2024-06-21 20:35:28,857 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 320 selfloop transitions, 777 changer transitions 0/1102 dead transitions. [2024-06-21 20:35:28,857 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 389 places, 1102 transitions, 24543 flow [2024-06-21 20:35:28,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 20:35:28,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 20:35:28,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 207 transitions. [2024-06-21 20:35:28,858 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47045454545454546 [2024-06-21 20:35:28,858 INFO L175 Difference]: Start difference. First operand has 380 places, 1037 transitions, 20775 flow. Second operand 10 states and 207 transitions. [2024-06-21 20:35:28,858 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 389 places, 1102 transitions, 24543 flow [2024-06-21 20:35:30,963 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 378 places, 1102 transitions, 21750 flow, removed 116 selfloop flow, removed 11 redundant places. [2024-06-21 20:35:30,978 INFO L231 Difference]: Finished difference. Result has 379 places, 1061 transitions, 20341 flow [2024-06-21 20:35:30,978 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=18126, PETRI_DIFFERENCE_MINUEND_PLACES=369, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1037, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=753, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=284, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=20341, PETRI_PLACES=379, PETRI_TRANSITIONS=1061} [2024-06-21 20:35:30,979 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 334 predicate places. [2024-06-21 20:35:30,979 INFO L495 AbstractCegarLoop]: Abstraction has has 379 places, 1061 transitions, 20341 flow [2024-06-21 20:35:30,979 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 20:35:30,979 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:35:30,979 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:35:30,979 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2024-06-21 20:35:30,979 INFO L420 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:35:30,979 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:35:30,979 INFO L85 PathProgramCache]: Analyzing trace with hash -1791647724, now seen corresponding path program 34 times [2024-06-21 20:35:30,979 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:35:30,979 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [635620916] [2024-06-21 20:35:30,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:35:30,979 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:35:30,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:35:31,989 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:35:31,989 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:35:31,989 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [635620916] [2024-06-21 20:35:31,989 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [635620916] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:35:31,989 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:35:31,989 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 20:35:31,989 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [485149889] [2024-06-21 20:35:31,990 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:35:31,990 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 20:35:31,990 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:35:31,990 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 20:35:31,990 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=62, Unknown=0, NotChecked=0, Total=110 [2024-06-21 20:35:32,091 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-21 20:35:32,092 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 379 places, 1061 transitions, 20341 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 20:35:32,092 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:35:32,092 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-21 20:35:32,092 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:35:35,212 INFO L124 PetriNetUnfolderBase]: 6643/10701 cut-off events. [2024-06-21 20:35:35,212 INFO L125 PetriNetUnfolderBase]: For 931527/931536 co-relation queries the response was YES. [2024-06-21 20:35:35,310 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85617 conditions, 10701 events. 6643/10701 cut-off events. For 931527/931536 co-relation queries the response was YES. Maximal size of possible extension queue 730. Compared 73001 event pairs, 1330 based on Foata normal form. 10/10685 useless extension candidates. Maximal degree in co-relation 85472. Up to 5909 conditions per place. [2024-06-21 20:35:35,359 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 315 selfloop transitions, 780 changer transitions 0/1100 dead transitions. [2024-06-21 20:35:35,360 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 388 places, 1100 transitions, 23061 flow [2024-06-21 20:35:35,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 20:35:35,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 20:35:35,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 204 transitions. [2024-06-21 20:35:35,361 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4636363636363636 [2024-06-21 20:35:35,361 INFO L175 Difference]: Start difference. First operand has 379 places, 1061 transitions, 20341 flow. Second operand 10 states and 204 transitions. [2024-06-21 20:35:35,361 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 388 places, 1100 transitions, 23061 flow [2024-06-21 20:35:37,365 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 379 places, 1100 transitions, 20127 flow, removed 128 selfloop flow, removed 9 redundant places. [2024-06-21 20:35:37,378 INFO L231 Difference]: Finished difference. Result has 380 places, 1061 transitions, 18984 flow [2024-06-21 20:35:37,379 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=17407, PETRI_DIFFERENCE_MINUEND_PLACES=370, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1061, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=780, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=281, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=18984, PETRI_PLACES=380, PETRI_TRANSITIONS=1061} [2024-06-21 20:35:37,379 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 335 predicate places. [2024-06-21 20:35:37,379 INFO L495 AbstractCegarLoop]: Abstraction has has 380 places, 1061 transitions, 18984 flow [2024-06-21 20:35:37,379 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 20:35:37,379 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:35:37,379 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:35:37,379 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2024-06-21 20:35:37,380 INFO L420 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:35:37,380 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:35:37,380 INFO L85 PathProgramCache]: Analyzing trace with hash 372842928, now seen corresponding path program 35 times [2024-06-21 20:35:37,380 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:35:37,380 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1825560731] [2024-06-21 20:35:37,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:35:37,380 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:35:37,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:35:38,367 INFO 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 20:35:38,367 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:35:38,367 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1825560731] [2024-06-21 20:35:38,367 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1825560731] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:35:38,367 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:35:38,368 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 20:35:38,368 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1028200899] [2024-06-21 20:35:38,368 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:35:38,368 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 20:35:38,368 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:35:38,368 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 20:35:38,368 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=62, Unknown=0, NotChecked=0, Total=110 [2024-06-21 20:35:38,498 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-21 20:35:38,499 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 380 places, 1061 transitions, 18984 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 20:35:38,499 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:35:38,499 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-21 20:35:38,499 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:35:41,515 INFO L124 PetriNetUnfolderBase]: 6615/10656 cut-off events. [2024-06-21 20:35:41,515 INFO L125 PetriNetUnfolderBase]: For 873154/873163 co-relation queries the response was YES. [2024-06-21 20:35:41,623 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84125 conditions, 10656 events. 6615/10656 cut-off events. For 873154/873163 co-relation queries the response was YES. Maximal size of possible extension queue 728. Compared 72626 event pairs, 1417 based on Foata normal form. 10/10640 useless extension candidates. Maximal degree in co-relation 83979. Up to 5886 conditions per place. [2024-06-21 20:35:41,676 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 324 selfloop transitions, 771 changer transitions 0/1100 dead transitions. [2024-06-21 20:35:41,676 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 389 places, 1100 transitions, 21492 flow [2024-06-21 20:35:41,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 20:35:41,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 20:35:41,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 204 transitions. [2024-06-21 20:35:41,677 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4636363636363636 [2024-06-21 20:35:41,677 INFO L175 Difference]: Start difference. First operand has 380 places, 1061 transitions, 18984 flow. Second operand 10 states and 204 transitions. [2024-06-21 20:35:41,677 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 389 places, 1100 transitions, 21492 flow [2024-06-21 20:35:43,621 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 380 places, 1100 transitions, 19751 flow, removed 106 selfloop flow, removed 9 redundant places. [2024-06-21 20:35:43,635 INFO L231 Difference]: Finished difference. Result has 381 places, 1061 transitions, 18802 flow [2024-06-21 20:35:43,635 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=17243, PETRI_DIFFERENCE_MINUEND_PLACES=371, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1061, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=771, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=290, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=18802, PETRI_PLACES=381, PETRI_TRANSITIONS=1061} [2024-06-21 20:35:43,636 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 336 predicate places. [2024-06-21 20:35:43,636 INFO L495 AbstractCegarLoop]: Abstraction has has 381 places, 1061 transitions, 18802 flow [2024-06-21 20:35:43,636 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 20:35:43,636 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:35:43,636 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:35:43,636 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2024-06-21 20:35:43,636 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 20:35:43,637 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:35:43,637 INFO L85 PathProgramCache]: Analyzing trace with hash 621530626, now seen corresponding path program 6 times [2024-06-21 20:35:43,637 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:35:43,637 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1385623877] [2024-06-21 20:35:43,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:35:43,637 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:35:43,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:35:44,642 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:35:44,642 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:35:44,642 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1385623877] [2024-06-21 20:35:44,642 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1385623877] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:35:44,643 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:35:44,643 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:35:44,643 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1212191233] [2024-06-21 20:35:44,643 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:35:44,643 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:35:44,643 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:35:44,643 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:35:44,643 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:35:44,746 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-21 20:35:44,746 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 381 places, 1061 transitions, 18802 flow. Second operand has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:35:44,747 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:35:44,747 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-21 20:35:44,747 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:35:46,815 INFO L124 PetriNetUnfolderBase]: 5497/8929 cut-off events. [2024-06-21 20:35:46,815 INFO L125 PetriNetUnfolderBase]: For 973403/973913 co-relation queries the response was YES. [2024-06-21 20:35:46,908 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75345 conditions, 8929 events. 5497/8929 cut-off events. For 973403/973913 co-relation queries the response was YES. Maximal size of possible extension queue 615. Compared 60179 event pairs, 1032 based on Foata normal form. 58/8749 useless extension candidates. Maximal degree in co-relation 75198. Up to 7344 conditions per place. [2024-06-21 20:35:46,956 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 888 selfloop transitions, 74 changer transitions 0/1074 dead transitions. [2024-06-21 20:35:46,956 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 388 places, 1074 transitions, 20839 flow [2024-06-21 20:35:46,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 20:35:46,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 20:35:46,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 153 transitions. [2024-06-21 20:35:46,957 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4346590909090909 [2024-06-21 20:35:46,957 INFO L175 Difference]: Start difference. First operand has 381 places, 1061 transitions, 18802 flow. Second operand 8 states and 153 transitions. [2024-06-21 20:35:46,957 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 388 places, 1074 transitions, 20839 flow [2024-06-21 20:35:48,775 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 377 places, 1074 transitions, 19087 flow, removed 0 selfloop flow, removed 11 redundant places. [2024-06-21 20:35:48,787 INFO L231 Difference]: Finished difference. Result has 378 places, 1064 transitions, 17270 flow [2024-06-21 20:35:48,788 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=17050, PETRI_DIFFERENCE_MINUEND_PLACES=370, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1061, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=987, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=17270, PETRI_PLACES=378, PETRI_TRANSITIONS=1064} [2024-06-21 20:35:48,788 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 333 predicate places. [2024-06-21 20:35:48,788 INFO L495 AbstractCegarLoop]: Abstraction has has 378 places, 1064 transitions, 17270 flow [2024-06-21 20:35:48,788 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:35:48,788 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:35:48,788 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:35:48,788 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2024-06-21 20:35:48,788 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 20:35:48,788 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:35:48,788 INFO L85 PathProgramCache]: Analyzing trace with hash -633642591, now seen corresponding path program 3 times [2024-06-21 20:35:48,789 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:35:48,789 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [729239847] [2024-06-21 20:35:48,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:35:48,789 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:35:48,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:35:49,939 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:35:49,939 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:35:49,939 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [729239847] [2024-06-21 20:35:49,939 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [729239847] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:35:49,939 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:35:49,939 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:35:49,939 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [647985721] [2024-06-21 20:35:49,939 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:35:49,940 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:35:49,940 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:35:49,940 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:35:49,940 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:35:50,037 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 44 [2024-06-21 20:35:50,037 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 378 places, 1064 transitions, 17270 flow. Second operand has 8 states, 8 states have (on average 14.75) internal successors, (118), 8 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:35:50,037 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:35:50,037 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 44 [2024-06-21 20:35:50,038 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:35:51,911 INFO L124 PetriNetUnfolderBase]: 5134/8162 cut-off events. [2024-06-21 20:35:51,911 INFO L125 PetriNetUnfolderBase]: For 1012448/1013100 co-relation queries the response was YES. [2024-06-21 20:35:51,988 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68150 conditions, 8162 events. 5134/8162 cut-off events. For 1012448/1013100 co-relation queries the response was YES. Maximal size of possible extension queue 561. Compared 52577 event pairs, 1179 based on Foata normal form. 111/7747 useless extension candidates. Maximal degree in co-relation 68002. Up to 6734 conditions per place. [2024-06-21 20:35:52,028 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 877 selfloop transitions, 30 changer transitions 0/1076 dead transitions. [2024-06-21 20:35:52,029 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 384 places, 1076 transitions, 19176 flow [2024-06-21 20:35:52,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:35:52,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:35:52,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 142 transitions. [2024-06-21 20:35:52,029 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.461038961038961 [2024-06-21 20:35:52,029 INFO L175 Difference]: Start difference. First operand has 378 places, 1064 transitions, 17270 flow. Second operand 7 states and 142 transitions. [2024-06-21 20:35:52,029 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 384 places, 1076 transitions, 19176 flow [2024-06-21 20:35:53,603 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 378 places, 1076 transitions, 18978 flow, removed 27 selfloop flow, removed 6 redundant places. [2024-06-21 20:35:53,615 INFO L231 Difference]: Finished difference. Result has 379 places, 1067 transitions, 17198 flow [2024-06-21 20:35:53,616 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=17072, PETRI_DIFFERENCE_MINUEND_PLACES=372, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1064, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1034, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=17198, PETRI_PLACES=379, PETRI_TRANSITIONS=1067} [2024-06-21 20:35:53,616 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 334 predicate places. [2024-06-21 20:35:53,616 INFO L495 AbstractCegarLoop]: Abstraction has has 379 places, 1067 transitions, 17198 flow [2024-06-21 20:35:53,616 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.75) internal successors, (118), 8 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:35:53,616 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:35:53,616 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:35:53,616 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97 [2024-06-21 20:35:53,616 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 20:35:53,616 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:35:53,617 INFO L85 PathProgramCache]: Analyzing trace with hash -633137601, now seen corresponding path program 4 times [2024-06-21 20:35:53,617 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:35:53,617 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [581641052] [2024-06-21 20:35:53,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:35:53,617 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:35:53,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:35:54,733 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:35:54,734 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:35:54,734 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [581641052] [2024-06-21 20:35:54,734 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [581641052] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:35:54,734 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:35:54,734 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:35:54,734 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1304146086] [2024-06-21 20:35:54,734 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:35:54,734 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:35:54,734 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:35:54,734 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:35:54,734 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:35:54,857 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 44 [2024-06-21 20:35:54,857 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 379 places, 1067 transitions, 17198 flow. Second operand has 8 states, 8 states have (on average 14.75) internal successors, (118), 8 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:35:54,857 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:35:54,857 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 44 [2024-06-21 20:35:54,857 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:35:56,734 INFO L124 PetriNetUnfolderBase]: 5131/8158 cut-off events. [2024-06-21 20:35:56,734 INFO L125 PetriNetUnfolderBase]: For 1031967/1032619 co-relation queries the response was YES. [2024-06-21 20:35:56,808 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68507 conditions, 8158 events. 5131/8158 cut-off events. For 1031967/1032619 co-relation queries the response was YES. Maximal size of possible extension queue 560. Compared 52571 event pairs, 1179 based on Foata normal form. 111/7743 useless extension candidates. Maximal degree in co-relation 68358. Up to 6716 conditions per place. [2024-06-21 20:35:56,848 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 872 selfloop transitions, 41 changer transitions 0/1082 dead transitions. [2024-06-21 20:35:56,848 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 385 places, 1082 transitions, 19136 flow [2024-06-21 20:35:56,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:35:56,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:35:56,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 143 transitions. [2024-06-21 20:35:56,849 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4642857142857143 [2024-06-21 20:35:56,849 INFO L175 Difference]: Start difference. First operand has 379 places, 1067 transitions, 17198 flow. Second operand 7 states and 143 transitions. [2024-06-21 20:35:56,849 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 385 places, 1082 transitions, 19136 flow [2024-06-21 20:35:58,668 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 380 places, 1082 transitions, 19032 flow, removed 24 selfloop flow, removed 5 redundant places. [2024-06-21 20:35:58,680 INFO L231 Difference]: Finished difference. Result has 382 places, 1073 transitions, 17283 flow [2024-06-21 20:35:58,681 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=17094, PETRI_DIFFERENCE_MINUEND_PLACES=374, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1067, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1027, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=17283, PETRI_PLACES=382, PETRI_TRANSITIONS=1073} [2024-06-21 20:35:58,682 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 337 predicate places. [2024-06-21 20:35:58,682 INFO L495 AbstractCegarLoop]: Abstraction has has 382 places, 1073 transitions, 17283 flow [2024-06-21 20:35:58,682 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.75) internal successors, (118), 8 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:35:58,682 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:35:58,682 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:35:58,682 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98 [2024-06-21 20:35:58,682 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 20:35:58,683 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:35:58,683 INFO L85 PathProgramCache]: Analyzing trace with hash -840199962, now seen corresponding path program 1 times [2024-06-21 20:35:58,683 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:35:58,683 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [40330327] [2024-06-21 20:35:58,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:35:58,683 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:35:58,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:35:59,531 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:35:59,532 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:35:59,532 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [40330327] [2024-06-21 20:35:59,532 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [40330327] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:35:59,532 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:35:59,532 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:35:59,532 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [596908136] [2024-06-21 20:35:59,532 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:35:59,533 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:35:59,533 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:35:59,533 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:35:59,533 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:35:59,625 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-21 20:35:59,625 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 382 places, 1073 transitions, 17283 flow. Second operand has 9 states, 9 states have (on average 13.555555555555555) internal successors, (122), 9 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:35:59,625 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:35:59,625 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-21 20:35:59,625 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:36:02,226 INFO L124 PetriNetUnfolderBase]: 6120/10039 cut-off events. [2024-06-21 20:36:02,226 INFO L125 PetriNetUnfolderBase]: For 947014/947093 co-relation queries the response was YES. [2024-06-21 20:36:02,315 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78398 conditions, 10039 events. 6120/10039 cut-off events. For 947014/947093 co-relation queries the response was YES. Maximal size of possible extension queue 740. Compared 70399 event pairs, 1979 based on Foata normal form. 75/9987 useless extension candidates. Maximal degree in co-relation 78247. Up to 8638 conditions per place. [2024-06-21 20:36:02,358 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 1009 selfloop transitions, 15 changer transitions 0/1092 dead transitions. [2024-06-21 20:36:02,359 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 388 places, 1092 transitions, 19473 flow [2024-06-21 20:36:02,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:36:02,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:36:02,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 141 transitions. [2024-06-21 20:36:02,361 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4577922077922078 [2024-06-21 20:36:02,361 INFO L175 Difference]: Start difference. First operand has 382 places, 1073 transitions, 17283 flow. Second operand 7 states and 141 transitions. [2024-06-21 20:36:02,361 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 388 places, 1092 transitions, 19473 flow [2024-06-21 20:36:04,405 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 385 places, 1092 transitions, 19388 flow, removed 27 selfloop flow, removed 3 redundant places. [2024-06-21 20:36:04,418 INFO L231 Difference]: Finished difference. Result has 386 places, 1076 transitions, 17292 flow [2024-06-21 20:36:04,418 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=17198, PETRI_DIFFERENCE_MINUEND_PLACES=379, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1073, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1058, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=17292, PETRI_PLACES=386, PETRI_TRANSITIONS=1076} [2024-06-21 20:36:04,419 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 341 predicate places. [2024-06-21 20:36:04,419 INFO L495 AbstractCegarLoop]: Abstraction has has 386 places, 1076 transitions, 17292 flow [2024-06-21 20:36:04,419 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.555555555555555) internal successors, (122), 9 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:36:04,419 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:36:04,419 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:36:04,419 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99 [2024-06-21 20:36:04,419 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 20:36:04,420 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:36:04,420 INFO L85 PathProgramCache]: Analyzing trace with hash -1151694872, now seen corresponding path program 2 times [2024-06-21 20:36:04,420 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:36:04,420 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [813217950] [2024-06-21 20:36:04,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:36:04,420 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:36:04,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:36:05,365 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:36:05,365 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:36:05,365 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [813217950] [2024-06-21 20:36:05,365 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [813217950] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:36:05,365 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:36:05,365 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:36:05,365 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1786750893] [2024-06-21 20:36:05,365 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:36:05,365 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:36:05,366 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:36:05,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:36:05,366 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:36:05,456 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-21 20:36:05,456 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 386 places, 1076 transitions, 17292 flow. Second operand has 9 states, 9 states have (on average 13.555555555555555) internal successors, (122), 9 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:36:05,456 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:36:05,456 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-21 20:36:05,456 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:36:08,038 INFO L124 PetriNetUnfolderBase]: 6130/10055 cut-off events. [2024-06-21 20:36:08,038 INFO L125 PetriNetUnfolderBase]: For 966774/966853 co-relation queries the response was YES. [2024-06-21 20:36:08,129 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79100 conditions, 10055 events. 6130/10055 cut-off events. For 966774/966853 co-relation queries the response was YES. Maximal size of possible extension queue 741. Compared 70456 event pairs, 1979 based on Foata normal form. 75/10003 useless extension candidates. Maximal degree in co-relation 78947. Up to 8643 conditions per place. [2024-06-21 20:36:08,175 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 1005 selfloop transitions, 20 changer transitions 0/1093 dead transitions. [2024-06-21 20:36:08,175 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 392 places, 1093 transitions, 19470 flow [2024-06-21 20:36:08,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:36:08,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:36:08,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 141 transitions. [2024-06-21 20:36:08,176 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4577922077922078 [2024-06-21 20:36:08,176 INFO L175 Difference]: Start difference. First operand has 386 places, 1076 transitions, 17292 flow. Second operand 7 states and 141 transitions. [2024-06-21 20:36:08,176 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 392 places, 1093 transitions, 19470 flow [2024-06-21 20:36:10,214 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 387 places, 1093 transitions, 19398 flow, removed 23 selfloop flow, removed 5 redundant places. [2024-06-21 20:36:10,226 INFO L231 Difference]: Finished difference. Result has 388 places, 1079 transitions, 17330 flow [2024-06-21 20:36:10,226 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=17220, PETRI_DIFFERENCE_MINUEND_PLACES=381, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1076, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1056, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=17330, PETRI_PLACES=388, PETRI_TRANSITIONS=1079} [2024-06-21 20:36:10,227 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 343 predicate places. [2024-06-21 20:36:10,227 INFO L495 AbstractCegarLoop]: Abstraction has has 388 places, 1079 transitions, 17330 flow [2024-06-21 20:36:10,227 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.555555555555555) internal successors, (122), 9 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:36:10,227 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:36:10,227 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:36:10,227 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100 [2024-06-21 20:36:10,227 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 20:36:10,227 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:36:10,227 INFO L85 PathProgramCache]: Analyzing trace with hash -644316101, now seen corresponding path program 1 times [2024-06-21 20:36:10,227 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:36:10,227 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [59029385] [2024-06-21 20:36:10,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:36:10,227 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:36:10,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:36:11,262 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:36:11,262 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:36:11,262 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [59029385] [2024-06-21 20:36:11,262 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [59029385] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:36:11,262 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:36:11,262 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:36:11,262 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [487531400] [2024-06-21 20:36:11,262 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:36:11,262 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:36:11,263 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:36:11,263 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:36:11,263 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:36:11,356 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-21 20:36:11,357 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 388 places, 1079 transitions, 17330 flow. Second operand has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:36:11,357 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:36:11,357 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-21 20:36:11,357 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:36:13,822 INFO L124 PetriNetUnfolderBase]: 6140/10071 cut-off events. [2024-06-21 20:36:13,822 INFO L125 PetriNetUnfolderBase]: For 990762/990841 co-relation queries the response was YES. [2024-06-21 20:36:13,917 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79735 conditions, 10071 events. 6140/10071 cut-off events. For 990762/990841 co-relation queries the response was YES. Maximal size of possible extension queue 742. Compared 70652 event pairs, 1978 based on Foata normal form. 76/10020 useless extension candidates. Maximal degree in co-relation 79581. Up to 8672 conditions per place. [2024-06-21 20:36:13,962 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 1012 selfloop transitions, 15 changer transitions 0/1095 dead transitions. [2024-06-21 20:36:13,962 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 394 places, 1095 transitions, 19492 flow [2024-06-21 20:36:13,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:36:13,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:36:13,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 138 transitions. [2024-06-21 20:36:13,963 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44805194805194803 [2024-06-21 20:36:13,963 INFO L175 Difference]: Start difference. First operand has 388 places, 1079 transitions, 17330 flow. Second operand 7 states and 138 transitions. [2024-06-21 20:36:13,963 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 394 places, 1095 transitions, 19492 flow [2024-06-21 20:36:16,463 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 389 places, 1095 transitions, 19404 flow, removed 26 selfloop flow, removed 5 redundant places. [2024-06-21 20:36:16,475 INFO L231 Difference]: Finished difference. Result has 390 places, 1082 transitions, 17328 flow [2024-06-21 20:36:16,476 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=17242, PETRI_DIFFERENCE_MINUEND_PLACES=383, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1079, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1064, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=17328, PETRI_PLACES=390, PETRI_TRANSITIONS=1082} [2024-06-21 20:36:16,476 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 345 predicate places. [2024-06-21 20:36:16,476 INFO L495 AbstractCegarLoop]: Abstraction has has 390 places, 1082 transitions, 17328 flow [2024-06-21 20:36:16,476 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:36:16,477 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:36:16,477 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:36:16,477 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101 [2024-06-21 20:36:16,477 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 20:36:16,477 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:36:16,477 INFO L85 PathProgramCache]: Analyzing trace with hash -633396575, now seen corresponding path program 2 times [2024-06-21 20:36:16,477 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:36:16,477 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [430446065] [2024-06-21 20:36:16,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:36:16,478 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:36:16,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:36:17,652 INFO 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 20:36:17,652 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:36:17,652 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [430446065] [2024-06-21 20:36:17,653 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [430446065] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:36:17,653 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:36:17,653 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:36:17,653 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1225131543] [2024-06-21 20:36:17,653 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:36:17,653 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:36:17,653 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:36:17,653 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:36:17,653 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:36:17,768 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-21 20:36:17,769 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 390 places, 1082 transitions, 17328 flow. Second operand has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:36:17,769 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:36:17,769 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-21 20:36:17,769 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:36:20,119 INFO L124 PetriNetUnfolderBase]: 6150/10086 cut-off events. [2024-06-21 20:36:20,120 INFO L125 PetriNetUnfolderBase]: For 1005606/1005688 co-relation queries the response was YES. [2024-06-21 20:36:20,222 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80341 conditions, 10086 events. 6150/10086 cut-off events. For 1005606/1005688 co-relation queries the response was YES. Maximal size of possible extension queue 742. Compared 70678 event pairs, 1980 based on Foata normal form. 77/10035 useless extension candidates. Maximal degree in co-relation 80186. Up to 8681 conditions per place. [2024-06-21 20:36:20,269 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 1006 selfloop transitions, 20 changer transitions 0/1094 dead transitions. [2024-06-21 20:36:20,269 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 396 places, 1094 transitions, 19464 flow [2024-06-21 20:36:20,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:36:20,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:36:20,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 136 transitions. [2024-06-21 20:36:20,270 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44155844155844154 [2024-06-21 20:36:20,270 INFO L175 Difference]: Start difference. First operand has 390 places, 1082 transitions, 17328 flow. Second operand 7 states and 136 transitions. [2024-06-21 20:36:20,270 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 396 places, 1094 transitions, 19464 flow [2024-06-21 20:36:22,569 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 391 places, 1094 transitions, 19400 flow, removed 19 selfloop flow, removed 5 redundant places. [2024-06-21 20:36:22,582 INFO L231 Difference]: Finished difference. Result has 392 places, 1085 transitions, 17362 flow [2024-06-21 20:36:22,582 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=17264, PETRI_DIFFERENCE_MINUEND_PLACES=385, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1082, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1062, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=17362, PETRI_PLACES=392, PETRI_TRANSITIONS=1085} [2024-06-21 20:36:22,582 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 347 predicate places. [2024-06-21 20:36:22,582 INFO L495 AbstractCegarLoop]: Abstraction has has 392 places, 1085 transitions, 17362 flow [2024-06-21 20:36:22,582 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:36:22,583 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:36:22,583 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:36:22,583 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102 [2024-06-21 20:36:22,583 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 20:36:22,583 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:36:22,583 INFO L85 PathProgramCache]: Analyzing trace with hash -633396792, now seen corresponding path program 3 times [2024-06-21 20:36:22,583 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:36:22,583 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [261176947] [2024-06-21 20:36:22,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:36:22,583 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:36:22,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:36:23,621 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:36:23,621 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:36:23,622 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [261176947] [2024-06-21 20:36:23,622 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [261176947] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:36:23,622 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:36:23,622 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:36:23,622 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [163003896] [2024-06-21 20:36:23,622 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:36:23,622 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:36:23,622 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:36:23,622 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:36:23,622 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:36:23,724 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-21 20:36:23,730 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 392 places, 1085 transitions, 17362 flow. Second operand has 9 states, 9 states have (on average 13.555555555555555) internal successors, (122), 9 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:36:23,731 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:36:23,731 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-21 20:36:23,731 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:36:26,180 INFO L124 PetriNetUnfolderBase]: 6152/10091 cut-off events. [2024-06-21 20:36:26,181 INFO L125 PetriNetUnfolderBase]: For 1021466/1021548 co-relation queries the response was YES. [2024-06-21 20:36:26,294 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80841 conditions, 10091 events. 6152/10091 cut-off events. For 1021466/1021548 co-relation queries the response was YES. Maximal size of possible extension queue 742. Compared 70766 event pairs, 1984 based on Foata normal form. 75/10038 useless extension candidates. Maximal degree in co-relation 80685. Up to 8660 conditions per place. [2024-06-21 20:36:26,342 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 1004 selfloop transitions, 27 changer transitions 0/1099 dead transitions. [2024-06-21 20:36:26,342 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 398 places, 1099 transitions, 19538 flow [2024-06-21 20:36:26,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:36:26,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:36:26,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 140 transitions. [2024-06-21 20:36:26,343 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45454545454545453 [2024-06-21 20:36:26,343 INFO L175 Difference]: Start difference. First operand has 392 places, 1085 transitions, 17362 flow. Second operand 7 states and 140 transitions. [2024-06-21 20:36:26,343 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 398 places, 1099 transitions, 19538 flow [2024-06-21 20:36:28,697 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 393 places, 1099 transitions, 19462 flow, removed 20 selfloop flow, removed 5 redundant places. [2024-06-21 20:36:28,709 INFO L231 Difference]: Finished difference. Result has 394 places, 1088 transitions, 17420 flow [2024-06-21 20:36:28,710 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=17286, PETRI_DIFFERENCE_MINUEND_PLACES=387, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1085, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1058, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=17420, PETRI_PLACES=394, PETRI_TRANSITIONS=1088} [2024-06-21 20:36:28,710 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 349 predicate places. [2024-06-21 20:36:28,710 INFO L495 AbstractCegarLoop]: Abstraction has has 394 places, 1088 transitions, 17420 flow [2024-06-21 20:36:28,710 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.555555555555555) internal successors, (122), 9 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:36:28,710 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:36:28,710 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:36:28,711 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103 [2024-06-21 20:36:28,711 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 20:36:28,711 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:36:28,711 INFO L85 PathProgramCache]: Analyzing trace with hash -633129665, now seen corresponding path program 3 times [2024-06-21 20:36:28,711 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:36:28,711 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1926278829] [2024-06-21 20:36:28,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:36:28,711 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:36:28,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:36:29,788 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:36:29,789 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:36:29,789 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1926278829] [2024-06-21 20:36:29,789 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1926278829] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:36:29,789 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:36:29,789 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 20:36:29,789 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2089636835] [2024-06-21 20:36:29,789 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:36:29,789 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 20:36:29,789 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:36:29,789 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 20:36:29,789 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-21 20:36:29,887 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-21 20:36:29,887 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 394 places, 1088 transitions, 17420 flow. Second operand has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:36:29,887 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:36:29,887 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-21 20:36:29,887 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:36:32,256 INFO L124 PetriNetUnfolderBase]: 6151/10090 cut-off events. [2024-06-21 20:36:32,257 INFO L125 PetriNetUnfolderBase]: For 1038328/1038410 co-relation queries the response was YES. [2024-06-21 20:36:32,364 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81258 conditions, 10090 events. 6151/10090 cut-off events. For 1038328/1038410 co-relation queries the response was YES. Maximal size of possible extension queue 741. Compared 70795 event pairs, 1980 based on Foata normal form. 78/10040 useless extension candidates. Maximal degree in co-relation 81101. Up to 8657 conditions per place. [2024-06-21 20:36:32,413 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 1006 selfloop transitions, 32 changer transitions 0/1106 dead transitions. [2024-06-21 20:36:32,414 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 400 places, 1106 transitions, 19816 flow [2024-06-21 20:36:32,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 20:36:32,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 20:36:32,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 140 transitions. [2024-06-21 20:36:32,415 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45454545454545453 [2024-06-21 20:36:32,415 INFO L175 Difference]: Start difference. First operand has 394 places, 1088 transitions, 17420 flow. Second operand 7 states and 140 transitions. [2024-06-21 20:36:32,415 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 400 places, 1106 transitions, 19816 flow [2024-06-21 20:36:35,045 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 395 places, 1106 transitions, 19704 flow, removed 31 selfloop flow, removed 5 redundant places. [2024-06-21 20:36:35,058 INFO L231 Difference]: Finished difference. Result has 396 places, 1094 transitions, 17497 flow [2024-06-21 20:36:35,059 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=17308, PETRI_DIFFERENCE_MINUEND_PLACES=389, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1088, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1059, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=17497, PETRI_PLACES=396, PETRI_TRANSITIONS=1094} [2024-06-21 20:36:35,059 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 351 predicate places. [2024-06-21 20:36:35,059 INFO L495 AbstractCegarLoop]: Abstraction has has 396 places, 1094 transitions, 17497 flow [2024-06-21 20:36:35,059 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:36:35,059 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:36:35,059 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 20:36:35,059 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104 [2024-06-21 20:36:35,059 INFO L420 AbstractCegarLoop]: === Iteration 106 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:36:35,059 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:36:35,059 INFO L85 PathProgramCache]: Analyzing trace with hash -1515703427, now seen corresponding path program 1 times [2024-06-21 20:36:35,060 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:36:35,060 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1152711030] [2024-06-21 20:36:35,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:36:35,060 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:36:35,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:36:35,814 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 20:36:35,814 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:36:35,814 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1152711030] [2024-06-21 20:36:35,814 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1152711030] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:36:35,814 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:36:35,814 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:36:35,814 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1059076002] [2024-06-21 20:36:35,814 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:36:35,815 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:36:35,815 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:36:35,815 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:36:35,815 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:36:35,901 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-21 20:36:35,901 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 396 places, 1094 transitions, 17497 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:36:35,901 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:36:35,902 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-21 20:36:35,902 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:36:38,706 INFO L124 PetriNetUnfolderBase]: 6790/10915 cut-off events. [2024-06-21 20:36:38,706 INFO L125 PetriNetUnfolderBase]: For 1032049/1032060 co-relation queries the response was YES. [2024-06-21 20:36:38,833 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87582 conditions, 10915 events. 6790/10915 cut-off events. For 1032049/1032060 co-relation queries the response was YES. Maximal size of possible extension queue 742. Compared 74738 event pairs, 1525 based on Foata normal form. 14/10926 useless extension candidates. Maximal degree in co-relation 87424. Up to 8970 conditions per place. [2024-06-21 20:36:38,887 INFO L140 encePairwiseOnDemand]: 30/44 looper letters, 847 selfloop transitions, 350 changer transitions 0/1202 dead transitions. [2024-06-21 20:36:38,888 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 405 places, 1202 transitions, 21492 flow [2024-06-21 20:36:38,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 20:36:38,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 20:36:38,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 204 transitions. [2024-06-21 20:36:38,889 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4636363636363636 [2024-06-21 20:36:38,889 INFO L175 Difference]: Start difference. First operand has 396 places, 1094 transitions, 17497 flow. Second operand 10 states and 204 transitions. [2024-06-21 20:36:38,889 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 405 places, 1202 transitions, 21492 flow [2024-06-21 20:36:41,593 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 402 places, 1202 transitions, 21419 flow, removed 27 selfloop flow, removed 3 redundant places. [2024-06-21 20:36:41,607 INFO L231 Difference]: Finished difference. Result has 406 places, 1160 transitions, 19603 flow [2024-06-21 20:36:41,608 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=17424, PETRI_DIFFERENCE_MINUEND_PLACES=393, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1094, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=286, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=789, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=19603, PETRI_PLACES=406, PETRI_TRANSITIONS=1160} [2024-06-21 20:36:41,608 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 361 predicate places. [2024-06-21 20:36:41,608 INFO L495 AbstractCegarLoop]: Abstraction has has 406 places, 1160 transitions, 19603 flow [2024-06-21 20:36:41,609 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:36:41,609 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:36:41,609 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 20:36:41,609 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105 [2024-06-21 20:36:41,609 INFO L420 AbstractCegarLoop]: === Iteration 107 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:36:41,609 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:36:41,609 INFO L85 PathProgramCache]: Analyzing trace with hash -1420391001, now seen corresponding path program 2 times [2024-06-21 20:36:41,609 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:36:41,610 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [792477448] [2024-06-21 20:36:41,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:36:41,610 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:36:41,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:36:42,392 INFO 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 20:36:42,393 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:36:42,393 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [792477448] [2024-06-21 20:36:42,393 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [792477448] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:36:42,393 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:36:42,393 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:36:42,393 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1929814139] [2024-06-21 20:36:42,393 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:36:42,393 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:36:42,393 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:36:42,393 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:36:42,393 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:36:42,478 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-21 20:36:42,478 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 406 places, 1160 transitions, 19603 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:36:42,478 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:36:42,478 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-21 20:36:42,478 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:36:45,375 INFO L124 PetriNetUnfolderBase]: 6815/10950 cut-off events. [2024-06-21 20:36:45,375 INFO L125 PetriNetUnfolderBase]: For 1063245/1063256 co-relation queries the response was YES. [2024-06-21 20:36:45,497 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90510 conditions, 10950 events. 6815/10950 cut-off events. For 1063245/1063256 co-relation queries the response was YES. Maximal size of possible extension queue 746. Compared 74972 event pairs, 1540 based on Foata normal form. 18/10965 useless extension candidates. Maximal degree in co-relation 90347. Up to 9084 conditions per place. [2024-06-21 20:36:45,551 INFO L140 encePairwiseOnDemand]: 30/44 looper letters, 846 selfloop transitions, 351 changer transitions 0/1202 dead transitions. [2024-06-21 20:36:45,551 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 415 places, 1202 transitions, 22372 flow [2024-06-21 20:36:45,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 20:36:45,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 20:36:45,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 201 transitions. [2024-06-21 20:36:45,552 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45681818181818185 [2024-06-21 20:36:45,552 INFO L175 Difference]: Start difference. First operand has 406 places, 1160 transitions, 19603 flow. Second operand 10 states and 201 transitions. [2024-06-21 20:36:45,552 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 415 places, 1202 transitions, 22372 flow [2024-06-21 20:36:48,793 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 411 places, 1202 transitions, 22144 flow, removed 68 selfloop flow, removed 4 redundant places. [2024-06-21 20:36:48,808 INFO L231 Difference]: Finished difference. Result has 412 places, 1164 transitions, 20247 flow [2024-06-21 20:36:48,808 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=19403, PETRI_DIFFERENCE_MINUEND_PLACES=402, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1160, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=347, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=809, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=20247, PETRI_PLACES=412, PETRI_TRANSITIONS=1164} [2024-06-21 20:36:48,808 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 367 predicate places. [2024-06-21 20:36:48,808 INFO L495 AbstractCegarLoop]: Abstraction has has 412 places, 1164 transitions, 20247 flow [2024-06-21 20:36:48,809 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:36:48,809 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:36:48,809 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 20:36:48,809 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106 [2024-06-21 20:36:48,809 INFO L420 AbstractCegarLoop]: === Iteration 108 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:36:48,809 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:36:48,809 INFO L85 PathProgramCache]: Analyzing trace with hash 1380846297, now seen corresponding path program 3 times [2024-06-21 20:36:48,809 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:36:48,809 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [873793418] [2024-06-21 20:36:48,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:36:48,809 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:36:48,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:36:49,477 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:36:49,477 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:36:49,477 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [873793418] [2024-06-21 20:36:49,477 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [873793418] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:36:49,477 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:36:49,477 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:36:49,477 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1179506715] [2024-06-21 20:36:49,477 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:36:49,478 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:36:49,478 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:36:49,478 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:36:49,478 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:36:49,572 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-21 20:36:49,572 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 412 places, 1164 transitions, 20247 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:36:49,572 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:36:49,572 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-21 20:36:49,572 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:36:52,795 INFO L124 PetriNetUnfolderBase]: 6921/11124 cut-off events. [2024-06-21 20:36:52,795 INFO L125 PetriNetUnfolderBase]: For 1103821/1103830 co-relation queries the response was YES. [2024-06-21 20:36:52,926 INFO L83 FinitePrefix]: Finished finitePrefix Result has 93147 conditions, 11124 events. 6921/11124 cut-off events. For 1103821/1103830 co-relation queries the response was YES. Maximal size of possible extension queue 765. Compared 76455 event pairs, 1422 based on Foata normal form. 12/11133 useless extension candidates. Maximal degree in co-relation 92982. Up to 8843 conditions per place. [2024-06-21 20:36:52,982 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 879 selfloop transitions, 342 changer transitions 0/1226 dead transitions. [2024-06-21 20:36:52,982 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 421 places, 1226 transitions, 23813 flow [2024-06-21 20:36:52,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 20:36:52,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 20:36:52,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 203 transitions. [2024-06-21 20:36:52,983 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46136363636363636 [2024-06-21 20:36:52,983 INFO L175 Difference]: Start difference. First operand has 412 places, 1164 transitions, 20247 flow. Second operand 10 states and 203 transitions. [2024-06-21 20:36:52,983 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 421 places, 1226 transitions, 23813 flow [2024-06-21 20:36:55,657 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 413 places, 1226 transitions, 23124 flow, removed 111 selfloop flow, removed 8 redundant places. [2024-06-21 20:36:55,672 INFO L231 Difference]: Finished difference. Result has 416 places, 1183 transitions, 20781 flow [2024-06-21 20:36:55,673 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=19662, PETRI_DIFFERENCE_MINUEND_PLACES=404, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1164, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=325, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=836, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=20781, PETRI_PLACES=416, PETRI_TRANSITIONS=1183} [2024-06-21 20:36:55,673 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 371 predicate places. [2024-06-21 20:36:55,673 INFO L495 AbstractCegarLoop]: Abstraction has has 416 places, 1183 transitions, 20781 flow [2024-06-21 20:36:55,674 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:36:55,674 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:36:55,674 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 20:36:55,674 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107 [2024-06-21 20:36:55,674 INFO L420 AbstractCegarLoop]: === Iteration 109 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:36:55,674 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:36:55,674 INFO L85 PathProgramCache]: Analyzing trace with hash -2048044199, now seen corresponding path program 4 times [2024-06-21 20:36:55,675 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:36:55,675 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [227930268] [2024-06-21 20:36:55,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:36:55,675 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:36:55,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:36:56,585 INFO 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 20:36:56,586 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:36:56,586 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [227930268] [2024-06-21 20:36:56,586 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [227930268] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:36:56,586 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:36:56,586 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 20:36:56,586 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1432955115] [2024-06-21 20:36:56,586 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:36:56,586 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 20:36:56,586 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:36:56,586 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 20:36:56,586 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2024-06-21 20:36:56,723 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-21 20:36:56,724 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 416 places, 1183 transitions, 20781 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 20:36:56,724 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:36:56,724 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-21 20:36:56,724 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:36:59,858 INFO L124 PetriNetUnfolderBase]: 7079/11369 cut-off events. [2024-06-21 20:36:59,858 INFO L125 PetriNetUnfolderBase]: For 1177175/1177183 co-relation queries the response was YES. [2024-06-21 20:36:59,984 INFO L83 FinitePrefix]: Finished finitePrefix Result has 96272 conditions, 11369 events. 7079/11369 cut-off events. For 1177175/1177183 co-relation queries the response was YES. Maximal size of possible extension queue 797. Compared 78378 event pairs, 1919 based on Foata normal form. 14/11381 useless extension candidates. Maximal degree in co-relation 96106. Up to 9944 conditions per place. [2024-06-21 20:37:00,037 INFO L140 encePairwiseOnDemand]: 30/44 looper letters, 1120 selfloop transitions, 128 changer transitions 0/1253 dead transitions. [2024-06-21 20:37:00,038 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 427 places, 1253 transitions, 24385 flow [2024-06-21 20:37:00,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 20:37:00,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 20:37:00,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 234 transitions. [2024-06-21 20:37:00,039 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4431818181818182 [2024-06-21 20:37:00,039 INFO L175 Difference]: Start difference. First operand has 416 places, 1183 transitions, 20781 flow. Second operand 12 states and 234 transitions. [2024-06-21 20:37:00,039 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 427 places, 1253 transitions, 24385 flow [2024-06-21 20:37:03,209 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 421 places, 1253 transitions, 23670 flow, removed 184 selfloop flow, removed 6 redundant places. [2024-06-21 20:37:03,225 INFO L231 Difference]: Finished difference. Result has 423 places, 1205 transitions, 20990 flow [2024-06-21 20:37:03,225 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=20282, PETRI_DIFFERENCE_MINUEND_PLACES=410, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1183, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=110, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1059, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=20990, PETRI_PLACES=423, PETRI_TRANSITIONS=1205} [2024-06-21 20:37:03,226 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 378 predicate places. [2024-06-21 20:37:03,226 INFO L495 AbstractCegarLoop]: Abstraction has has 423 places, 1205 transitions, 20990 flow [2024-06-21 20:37:03,226 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 20:37:03,226 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:37:03,226 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 20:37:03,226 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108 [2024-06-21 20:37:03,226 INFO L420 AbstractCegarLoop]: === Iteration 110 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:37:03,226 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:37:03,227 INFO L85 PathProgramCache]: Analyzing trace with hash -2039835425, now seen corresponding path program 5 times [2024-06-21 20:37:03,227 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:37:03,227 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1315516777] [2024-06-21 20:37:03,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:37:03,227 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:37:03,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:37:04,177 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 20:37:04,177 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:37:04,177 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1315516777] [2024-06-21 20:37:04,177 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1315516777] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:37:04,177 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:37:04,177 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 20:37:04,178 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1764681623] [2024-06-21 20:37:04,178 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:37:04,178 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 20:37:04,178 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:37:04,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 20:37:04,178 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2024-06-21 20:37:04,309 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-21 20:37:04,309 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 423 places, 1205 transitions, 20990 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 20:37:04,309 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:37:04,309 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-21 20:37:04,310 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:37:07,359 INFO L124 PetriNetUnfolderBase]: 7061/11347 cut-off events. [2024-06-21 20:37:07,359 INFO L125 PetriNetUnfolderBase]: For 1163993/1164001 co-relation queries the response was YES. [2024-06-21 20:37:07,493 INFO L83 FinitePrefix]: Finished finitePrefix Result has 94986 conditions, 11347 events. 7061/11347 cut-off events. For 1163993/1164001 co-relation queries the response was YES. Maximal size of possible extension queue 797. Compared 78270 event pairs, 1948 based on Foata normal form. 16/11361 useless extension candidates. Maximal degree in co-relation 94818. Up to 10031 conditions per place. [2024-06-21 20:37:07,550 INFO L140 encePairwiseOnDemand]: 30/44 looper letters, 1126 selfloop transitions, 114 changer transitions 0/1245 dead transitions. [2024-06-21 20:37:07,550 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 433 places, 1245 transitions, 23662 flow [2024-06-21 20:37:07,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 20:37:07,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 20:37:07,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 213 transitions. [2024-06-21 20:37:07,551 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44008264462809915 [2024-06-21 20:37:07,551 INFO L175 Difference]: Start difference. First operand has 423 places, 1205 transitions, 20990 flow. Second operand 11 states and 213 transitions. [2024-06-21 20:37:07,551 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 433 places, 1245 transitions, 23662 flow [2024-06-21 20:37:11,170 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 425 places, 1245 transitions, 23347 flow, removed 91 selfloop flow, removed 8 redundant places. [2024-06-21 20:37:11,185 INFO L231 Difference]: Finished difference. Result has 426 places, 1205 transitions, 20920 flow [2024-06-21 20:37:11,185 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=20675, PETRI_DIFFERENCE_MINUEND_PLACES=415, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1205, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=114, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1091, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=20920, PETRI_PLACES=426, PETRI_TRANSITIONS=1205} [2024-06-21 20:37:11,185 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 381 predicate places. [2024-06-21 20:37:11,185 INFO L495 AbstractCegarLoop]: Abstraction has has 426 places, 1205 transitions, 20920 flow [2024-06-21 20:37:11,186 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 20:37:11,186 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:37:11,186 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 20:37:11,186 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109 [2024-06-21 20:37:11,186 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 20:37:11,186 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:37:11,186 INFO L85 PathProgramCache]: Analyzing trace with hash 1669808209, now seen corresponding path program 1 times [2024-06-21 20:37:11,186 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:37:11,186 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1655640809] [2024-06-21 20:37:11,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:37:11,187 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:37:11,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:37:11,974 INFO 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 20:37:11,974 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:37:11,974 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1655640809] [2024-06-21 20:37:11,974 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1655640809] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:37:11,974 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:37:11,974 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:37:11,975 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1648364437] [2024-06-21 20:37:11,975 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:37:11,975 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:37:11,975 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:37:11,975 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:37:11,975 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:37:12,071 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-21 20:37:12,071 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 426 places, 1205 transitions, 20920 flow. Second operand has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:37:12,071 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:37:12,071 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-21 20:37:12,071 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:37:14,489 INFO L124 PetriNetUnfolderBase]: 5922/9659 cut-off events. [2024-06-21 20:37:14,489 INFO L125 PetriNetUnfolderBase]: For 1353221/1353488 co-relation queries the response was YES. [2024-06-21 20:37:14,605 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85535 conditions, 9659 events. 5922/9659 cut-off events. For 1353221/1353488 co-relation queries the response was YES. Maximal size of possible extension queue 699. Compared 66720 event pairs, 1358 based on Foata normal form. 129/9517 useless extension candidates. Maximal degree in co-relation 85365. Up to 7877 conditions per place. [2024-06-21 20:37:14,653 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 979 selfloop transitions, 91 changer transitions 0/1237 dead transitions. [2024-06-21 20:37:14,654 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 434 places, 1237 transitions, 23290 flow [2024-06-21 20:37:14,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:37:14,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:37:14,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 188 transitions. [2024-06-21 20:37:14,654 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47474747474747475 [2024-06-21 20:37:14,654 INFO L175 Difference]: Start difference. First operand has 426 places, 1205 transitions, 20920 flow. Second operand 9 states and 188 transitions. [2024-06-21 20:37:14,654 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 434 places, 1237 transitions, 23290 flow [2024-06-21 20:37:17,954 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 426 places, 1237 transitions, 23104 flow, removed 3 selfloop flow, removed 8 redundant places. [2024-06-21 20:37:17,969 INFO L231 Difference]: Finished difference. Result has 427 places, 1208 transitions, 21009 flow [2024-06-21 20:37:17,969 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=20734, PETRI_DIFFERENCE_MINUEND_PLACES=418, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1205, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1114, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=21009, PETRI_PLACES=427, PETRI_TRANSITIONS=1208} [2024-06-21 20:37:17,969 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 382 predicate places. [2024-06-21 20:37:17,969 INFO L495 AbstractCegarLoop]: Abstraction has has 427 places, 1208 transitions, 21009 flow [2024-06-21 20:37:17,970 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:37:17,970 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:37:17,970 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 20:37:17,970 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110 [2024-06-21 20:37:17,970 INFO L420 AbstractCegarLoop]: === Iteration 112 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:37:17,970 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:37:17,970 INFO L85 PathProgramCache]: Analyzing trace with hash -1903548459, now seen corresponding path program 6 times [2024-06-21 20:37:17,971 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:37:17,971 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [124976370] [2024-06-21 20:37:17,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:37:17,971 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:37:17,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:37:18,932 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 20:37:18,932 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:37:18,932 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [124976370] [2024-06-21 20:37:18,932 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [124976370] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:37:18,932 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:37:18,932 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 20:37:18,932 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1069035155] [2024-06-21 20:37:18,932 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:37:18,932 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 20:37:18,933 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:37:18,933 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 20:37:18,933 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2024-06-21 20:37:19,051 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-21 20:37:19,051 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 427 places, 1208 transitions, 21009 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 20:37:19,051 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:37:19,051 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-21 20:37:19,051 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:37:22,379 INFO L124 PetriNetUnfolderBase]: 7132/11456 cut-off events. [2024-06-21 20:37:22,379 INFO L125 PetriNetUnfolderBase]: For 1211105/1211111 co-relation queries the response was YES. [2024-06-21 20:37:22,510 INFO L83 FinitePrefix]: Finished finitePrefix Result has 96631 conditions, 11456 events. 7132/11456 cut-off events. For 1211105/1211111 co-relation queries the response was YES. Maximal size of possible extension queue 805. Compared 79149 event pairs, 1971 based on Foata normal form. 14/11468 useless extension candidates. Maximal degree in co-relation 96460. Up to 10133 conditions per place. [2024-06-21 20:37:22,564 INFO L140 encePairwiseOnDemand]: 30/44 looper letters, 1138 selfloop transitions, 113 changer transitions 0/1256 dead transitions. [2024-06-21 20:37:22,564 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 437 places, 1256 transitions, 23907 flow [2024-06-21 20:37:22,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 20:37:22,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 20:37:22,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 213 transitions. [2024-06-21 20:37:22,565 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44008264462809915 [2024-06-21 20:37:22,565 INFO L175 Difference]: Start difference. First operand has 427 places, 1208 transitions, 21009 flow. Second operand 11 states and 213 transitions. [2024-06-21 20:37:22,565 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 437 places, 1256 transitions, 23907 flow [2024-06-21 20:37:25,913 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 430 places, 1256 transitions, 23672 flow, removed 33 selfloop flow, removed 7 redundant places. [2024-06-21 20:37:25,929 INFO L231 Difference]: Finished difference. Result has 431 places, 1218 transitions, 21267 flow [2024-06-21 20:37:25,930 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=20774, PETRI_DIFFERENCE_MINUEND_PLACES=420, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1208, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=103, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1095, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=21267, PETRI_PLACES=431, PETRI_TRANSITIONS=1218} [2024-06-21 20:37:25,930 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 386 predicate places. [2024-06-21 20:37:25,930 INFO L495 AbstractCegarLoop]: Abstraction has has 431 places, 1218 transitions, 21267 flow [2024-06-21 20:37:25,930 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 20:37:25,930 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:37:25,931 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 20:37:25,931 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111 [2024-06-21 20:37:25,931 INFO L420 AbstractCegarLoop]: === Iteration 113 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:37:25,931 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:37:25,931 INFO L85 PathProgramCache]: Analyzing trace with hash -1114300297, now seen corresponding path program 7 times [2024-06-21 20:37:25,931 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:37:25,931 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [142836443] [2024-06-21 20:37:25,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:37:25,931 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:37:25,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:37:26,915 INFO 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 20:37:26,915 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:37:26,915 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [142836443] [2024-06-21 20:37:26,915 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [142836443] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:37:26,915 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:37:26,915 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 20:37:26,915 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [56730063] [2024-06-21 20:37:26,915 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:37:26,916 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 20:37:26,916 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:37:26,916 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 20:37:26,916 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2024-06-21 20:37:27,039 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-21 20:37:27,040 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 431 places, 1218 transitions, 21267 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 20:37:27,040 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:37:27,040 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-21 20:37:27,040 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:37:30,278 INFO L124 PetriNetUnfolderBase]: 7244/11634 cut-off events. [2024-06-21 20:37:30,278 INFO L125 PetriNetUnfolderBase]: For 1231964/1231970 co-relation queries the response was YES. [2024-06-21 20:37:30,419 INFO L83 FinitePrefix]: Finished finitePrefix Result has 98117 conditions, 11634 events. 7244/11634 cut-off events. For 1231964/1231970 co-relation queries the response was YES. Maximal size of possible extension queue 825. Compared 80625 event pairs, 1969 based on Foata normal form. 12/11644 useless extension candidates. Maximal degree in co-relation 97945. Up to 10188 conditions per place. [2024-06-21 20:37:30,478 INFO L140 encePairwiseOnDemand]: 30/44 looper letters, 1144 selfloop transitions, 131 changer transitions 0/1280 dead transitions. [2024-06-21 20:37:30,478 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 442 places, 1280 transitions, 24279 flow [2024-06-21 20:37:30,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 20:37:30,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 20:37:30,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 232 transitions. [2024-06-21 20:37:30,479 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4393939393939394 [2024-06-21 20:37:30,479 INFO L175 Difference]: Start difference. First operand has 431 places, 1218 transitions, 21267 flow. Second operand 12 states and 232 transitions. [2024-06-21 20:37:30,479 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 442 places, 1280 transitions, 24279 flow [2024-06-21 20:37:34,260 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 435 places, 1280 transitions, 23999 flow, removed 54 selfloop flow, removed 7 redundant places. [2024-06-21 20:37:34,275 INFO L231 Difference]: Finished difference. Result has 437 places, 1236 transitions, 21604 flow [2024-06-21 20:37:34,276 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=20987, PETRI_DIFFERENCE_MINUEND_PLACES=424, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1218, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=113, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1087, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=21604, PETRI_PLACES=437, PETRI_TRANSITIONS=1236} [2024-06-21 20:37:34,276 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 392 predicate places. [2024-06-21 20:37:34,276 INFO L495 AbstractCegarLoop]: Abstraction has has 437 places, 1236 transitions, 21604 flow [2024-06-21 20:37:34,276 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 20:37:34,276 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:37:34,276 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 20:37:34,276 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112 [2024-06-21 20:37:34,276 INFO L420 AbstractCegarLoop]: === Iteration 114 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:37:34,277 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:37:34,277 INFO L85 PathProgramCache]: Analyzing trace with hash -1786804133, now seen corresponding path program 8 times [2024-06-21 20:37:34,277 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:37:34,277 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [38966075] [2024-06-21 20:37:34,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:37:34,277 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:37:34,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:37:35,195 INFO 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 20:37:35,195 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:37:35,195 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [38966075] [2024-06-21 20:37:35,195 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [38966075] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:37:35,195 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:37:35,195 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 20:37:35,195 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1314060841] [2024-06-21 20:37:35,195 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:37:35,195 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 20:37:35,195 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:37:35,196 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 20:37:35,196 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2024-06-21 20:37:35,312 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-21 20:37:35,312 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 437 places, 1236 transitions, 21604 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 20:37:35,312 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:37:35,312 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-21 20:37:35,312 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:37:39,043 INFO L124 PetriNetUnfolderBase]: 7294/11720 cut-off events. [2024-06-21 20:37:39,043 INFO L125 PetriNetUnfolderBase]: For 1258054/1258063 co-relation queries the response was YES. [2024-06-21 20:37:39,173 INFO L83 FinitePrefix]: Finished finitePrefix Result has 99286 conditions, 11720 events. 7294/11720 cut-off events. For 1258054/1258063 co-relation queries the response was YES. Maximal size of possible extension queue 822. Compared 81383 event pairs, 1600 based on Foata normal form. 16/11733 useless extension candidates. Maximal degree in co-relation 99112. Up to 9836 conditions per place. [2024-06-21 20:37:39,227 INFO L140 encePairwiseOnDemand]: 30/44 looper letters, 949 selfloop transitions, 354 changer transitions 0/1308 dead transitions. [2024-06-21 20:37:39,227 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 447 places, 1308 transitions, 25053 flow [2024-06-21 20:37:39,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 20:37:39,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 20:37:39,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 219 transitions. [2024-06-21 20:37:39,228 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4524793388429752 [2024-06-21 20:37:39,228 INFO L175 Difference]: Start difference. First operand has 437 places, 1236 transitions, 21604 flow. Second operand 11 states and 219 transitions. [2024-06-21 20:37:39,228 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 447 places, 1308 transitions, 25053 flow [2024-06-21 20:37:42,991 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 438 places, 1308 transitions, 24744 flow, removed 44 selfloop flow, removed 9 redundant places. [2024-06-21 20:37:43,007 INFO L231 Difference]: Finished difference. Result has 440 places, 1264 transitions, 22701 flow [2024-06-21 20:37:43,008 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=21295, PETRI_DIFFERENCE_MINUEND_PLACES=428, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1236, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=326, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=901, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=22701, PETRI_PLACES=440, PETRI_TRANSITIONS=1264} [2024-06-21 20:37:43,008 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 395 predicate places. [2024-06-21 20:37:43,008 INFO L495 AbstractCegarLoop]: Abstraction has has 440 places, 1264 transitions, 22701 flow [2024-06-21 20:37:43,008 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 20:37:43,008 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:37:43,008 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 20:37:43,008 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113 [2024-06-21 20:37:43,008 INFO L420 AbstractCegarLoop]: === Iteration 115 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:37:43,009 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:37:43,009 INFO L85 PathProgramCache]: Analyzing trace with hash -1369238459, now seen corresponding path program 9 times [2024-06-21 20:37:43,009 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:37:43,009 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [822440097] [2024-06-21 20:37:43,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:37:43,009 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:37:43,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:37:44,039 INFO 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 20:37:44,039 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:37:44,039 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [822440097] [2024-06-21 20:37:44,039 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [822440097] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:37:44,039 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:37:44,039 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 20:37:44,039 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [112336346] [2024-06-21 20:37:44,039 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:37:44,040 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 20:37:44,040 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:37:44,040 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 20:37:44,040 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2024-06-21 20:37:44,159 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-21 20:37:44,160 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 440 places, 1264 transitions, 22701 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 20:37:44,160 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:37:44,160 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-21 20:37:44,160 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:37:47,953 INFO L124 PetriNetUnfolderBase]: 7333/11769 cut-off events. [2024-06-21 20:37:47,953 INFO L125 PetriNetUnfolderBase]: For 1289933/1289940 co-relation queries the response was YES. [2024-06-21 20:37:48,326 INFO L83 FinitePrefix]: Finished finitePrefix Result has 101078 conditions, 11769 events. 7333/11769 cut-off events. For 1289933/1289940 co-relation queries the response was YES. Maximal size of possible extension queue 825. Compared 81459 event pairs, 1595 based on Foata normal form. 14/11780 useless extension candidates. Maximal degree in co-relation 100902. Up to 9907 conditions per place. [2024-06-21 20:37:48,376 INFO L140 encePairwiseOnDemand]: 30/44 looper letters, 956 selfloop transitions, 353 changer transitions 0/1314 dead transitions. [2024-06-21 20:37:48,376 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 450 places, 1314 transitions, 25817 flow [2024-06-21 20:37:48,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 20:37:48,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 20:37:48,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 217 transitions. [2024-06-21 20:37:48,377 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44834710743801653 [2024-06-21 20:37:48,377 INFO L175 Difference]: Start difference. First operand has 440 places, 1264 transitions, 22701 flow. Second operand 11 states and 217 transitions. [2024-06-21 20:37:48,377 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 450 places, 1314 transitions, 25817 flow [2024-06-21 20:37:51,835 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 441 places, 1314 transitions, 25042 flow, removed 134 selfloop flow, removed 9 redundant places. [2024-06-21 20:37:51,851 INFO L231 Difference]: Finished difference. Result has 442 places, 1270 transitions, 22866 flow [2024-06-21 20:37:51,852 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=21926, PETRI_DIFFERENCE_MINUEND_PLACES=431, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1264, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=347, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=911, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=22866, PETRI_PLACES=442, PETRI_TRANSITIONS=1270} [2024-06-21 20:37:51,852 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 397 predicate places. [2024-06-21 20:37:51,852 INFO L495 AbstractCegarLoop]: Abstraction has has 442 places, 1270 transitions, 22866 flow [2024-06-21 20:37:51,853 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 20:37:51,853 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:37:51,853 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 20:37:51,853 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable114 [2024-06-21 20:37:51,853 INFO L420 AbstractCegarLoop]: === Iteration 116 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:37:51,853 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:37:51,853 INFO L85 PathProgramCache]: Analyzing trace with hash -1113732493, now seen corresponding path program 1 times [2024-06-21 20:37:51,854 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:37:51,854 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1207688741] [2024-06-21 20:37:51,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:37:51,854 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:37:51,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:37:52,920 INFO 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 20:37:52,920 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:37:52,921 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1207688741] [2024-06-21 20:37:52,921 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1207688741] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:37:52,921 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:37:52,921 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 20:37:52,921 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2000572696] [2024-06-21 20:37:52,921 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:37:52,921 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 20:37:52,921 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:37:52,921 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 20:37:52,921 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2024-06-21 20:37:53,040 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-21 20:37:53,041 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 442 places, 1270 transitions, 22866 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 20:37:53,041 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:37:53,041 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-21 20:37:53,041 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:37:56,953 INFO L124 PetriNetUnfolderBase]: 7350/11794 cut-off events. [2024-06-21 20:37:56,953 INFO L125 PetriNetUnfolderBase]: For 1313490/1313499 co-relation queries the response was YES. [2024-06-21 20:37:57,081 INFO L83 FinitePrefix]: Finished finitePrefix Result has 100909 conditions, 11794 events. 7350/11794 cut-off events. For 1313490/1313499 co-relation queries the response was YES. Maximal size of possible extension queue 836. Compared 81970 event pairs, 1640 based on Foata normal form. 10/11801 useless extension candidates. Maximal degree in co-relation 100735. Up to 10058 conditions per place. [2024-06-21 20:37:57,134 INFO L140 encePairwiseOnDemand]: 30/44 looper letters, 1110 selfloop transitions, 203 changer transitions 0/1318 dead transitions. [2024-06-21 20:37:57,134 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 452 places, 1318 transitions, 25895 flow [2024-06-21 20:37:57,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 20:37:57,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 20:37:57,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 219 transitions. [2024-06-21 20:37:57,135 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4524793388429752 [2024-06-21 20:37:57,135 INFO L175 Difference]: Start difference. First operand has 442 places, 1270 transitions, 22866 flow. Second operand 11 states and 219 transitions. [2024-06-21 20:37:57,135 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 452 places, 1318 transitions, 25895 flow [2024-06-21 20:38:00,849 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 442 places, 1318 transitions, 24954 flow, removed 96 selfloop flow, removed 10 redundant places. [2024-06-21 20:38:00,865 INFO L231 Difference]: Finished difference. Result has 444 places, 1277 transitions, 22505 flow [2024-06-21 20:38:00,865 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=21929, PETRI_DIFFERENCE_MINUEND_PLACES=432, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1270, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=196, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1071, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=22505, PETRI_PLACES=444, PETRI_TRANSITIONS=1277} [2024-06-21 20:38:00,865 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 399 predicate places. [2024-06-21 20:38:00,865 INFO L495 AbstractCegarLoop]: Abstraction has has 444 places, 1277 transitions, 22505 flow [2024-06-21 20:38:00,866 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 20:38:00,866 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:38:00,866 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 20:38:00,866 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115 [2024-06-21 20:38:00,866 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 20:38:00,866 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:38:00,866 INFO L85 PathProgramCache]: Analyzing trace with hash -578890337, now seen corresponding path program 2 times [2024-06-21 20:38:00,866 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:38:00,866 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1946063542] [2024-06-21 20:38:00,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:38:00,867 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:38:00,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:38:01,819 INFO 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 20:38:01,820 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:38:01,820 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1946063542] [2024-06-21 20:38:01,820 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1946063542] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:38:01,820 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:38:01,820 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:38:01,820 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1637560975] [2024-06-21 20:38:01,820 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:38:01,820 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:38:01,820 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:38:01,820 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:38:01,820 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:38:01,929 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-21 20:38:01,930 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 444 places, 1277 transitions, 22505 flow. Second operand has 10 states, 10 states have (on average 13.5) internal successors, (135), 10 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:38:01,930 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:38:01,930 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-21 20:38:01,930 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:38:04,853 INFO L124 PetriNetUnfolderBase]: 6163/10103 cut-off events. [2024-06-21 20:38:04,853 INFO L125 PetriNetUnfolderBase]: For 1526560/1526823 co-relation queries the response was YES. [2024-06-21 20:38:04,975 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90946 conditions, 10103 events. 6163/10103 cut-off events. For 1526560/1526823 co-relation queries the response was YES. Maximal size of possible extension queue 759. Compared 71211 event pairs, 1445 based on Foata normal form. 130/9961 useless extension candidates. Maximal degree in co-relation 90772. Up to 8222 conditions per place. [2024-06-21 20:38:05,028 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 1016 selfloop transitions, 91 changer transitions 0/1310 dead transitions. [2024-06-21 20:38:05,029 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 452 places, 1310 transitions, 24943 flow [2024-06-21 20:38:05,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:38:05,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:38:05,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 188 transitions. [2024-06-21 20:38:05,029 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47474747474747475 [2024-06-21 20:38:05,029 INFO L175 Difference]: Start difference. First operand has 444 places, 1277 transitions, 22505 flow. Second operand 9 states and 188 transitions. [2024-06-21 20:38:05,029 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 452 places, 1310 transitions, 24943 flow [2024-06-21 20:38:08,715 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 443 places, 1310 transitions, 23742 flow, removed 64 selfloop flow, removed 9 redundant places. [2024-06-21 20:38:08,730 INFO L231 Difference]: Finished difference. Result has 444 places, 1283 transitions, 21603 flow [2024-06-21 20:38:08,730 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=21304, PETRI_DIFFERENCE_MINUEND_PLACES=435, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1277, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=85, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1186, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=21603, PETRI_PLACES=444, PETRI_TRANSITIONS=1283} [2024-06-21 20:38:08,730 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 399 predicate places. [2024-06-21 20:38:08,730 INFO L495 AbstractCegarLoop]: Abstraction has has 444 places, 1283 transitions, 21603 flow [2024-06-21 20:38:08,730 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 13.5) internal successors, (135), 10 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:38:08,730 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:38:08,730 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 20:38:08,730 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116 [2024-06-21 20:38:08,730 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 20:38:08,731 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:38:08,731 INFO L85 PathProgramCache]: Analyzing trace with hash -566913797, now seen corresponding path program 3 times [2024-06-21 20:38:08,731 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:38:08,731 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [45795156] [2024-06-21 20:38:08,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:38:08,731 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:38:08,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:38:09,775 INFO 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 20:38:09,775 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:38:09,775 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [45795156] [2024-06-21 20:38:09,775 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [45795156] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:38:09,775 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:38:09,775 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 20:38:09,775 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [507640131] [2024-06-21 20:38:09,775 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:38:09,775 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 20:38:09,776 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:38:09,776 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 20:38:09,776 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-21 20:38:09,882 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-21 20:38:09,882 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 444 places, 1283 transitions, 21603 flow. Second operand has 10 states, 10 states have (on average 13.5) internal successors, (135), 10 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:38:09,882 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:38:09,882 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-21 20:38:09,883 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:38:12,870 INFO L124 PetriNetUnfolderBase]: 6176/10104 cut-off events. [2024-06-21 20:38:12,870 INFO L125 PetriNetUnfolderBase]: For 1544100/1544354 co-relation queries the response was YES. [2024-06-21 20:38:12,975 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89359 conditions, 10104 events. 6176/10104 cut-off events. For 1544100/1544354 co-relation queries the response was YES. Maximal size of possible extension queue 758. Compared 70963 event pairs, 1419 based on Foata normal form. 127/9954 useless extension candidates. Maximal degree in co-relation 89186. Up to 8205 conditions per place. [2024-06-21 20:38:13,020 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 1004 selfloop transitions, 103 changer transitions 0/1310 dead transitions. [2024-06-21 20:38:13,020 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 452 places, 1310 transitions, 24025 flow [2024-06-21 20:38:13,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:38:13,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:38:13,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 185 transitions. [2024-06-21 20:38:13,022 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4671717171717172 [2024-06-21 20:38:13,022 INFO L175 Difference]: Start difference. First operand has 444 places, 1283 transitions, 21603 flow. Second operand 9 states and 185 transitions. [2024-06-21 20:38:13,022 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 452 places, 1310 transitions, 24025 flow [2024-06-21 20:38:16,448 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 444 places, 1310 transitions, 23735 flow, removed 47 selfloop flow, removed 8 redundant places. [2024-06-21 20:38:16,464 INFO L231 Difference]: Finished difference. Result has 445 places, 1286 transitions, 21629 flow [2024-06-21 20:38:16,464 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=21325, PETRI_DIFFERENCE_MINUEND_PLACES=436, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1283, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=100, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1180, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=21629, PETRI_PLACES=445, PETRI_TRANSITIONS=1286} [2024-06-21 20:38:16,464 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 400 predicate places. [2024-06-21 20:38:16,465 INFO L495 AbstractCegarLoop]: Abstraction has has 445 places, 1286 transitions, 21629 flow [2024-06-21 20:38:16,465 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 13.5) internal successors, (135), 10 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:38:16,465 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:38:16,465 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 20:38:16,465 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117 [2024-06-21 20:38:16,465 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 20:38:16,465 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:38:16,465 INFO L85 PathProgramCache]: Analyzing trace with hash -1363651139, now seen corresponding path program 1 times [2024-06-21 20:38:16,465 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:38:16,465 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1795570907] [2024-06-21 20:38:16,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:38:16,466 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:38:16,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:38:17,607 INFO 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 20:38:17,608 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:38:17,608 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1795570907] [2024-06-21 20:38:17,608 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1795570907] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:38:17,608 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:38:17,608 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 20:38:17,608 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [783162408] [2024-06-21 20:38:17,608 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:38:17,608 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 20:38:17,608 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:38:17,608 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 20:38:17,608 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 20:38:17,746 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-21 20:38:17,747 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 445 places, 1286 transitions, 21629 flow. Second operand has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:38:17,747 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:38:17,747 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-21 20:38:17,747 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:38:20,622 INFO L124 PetriNetUnfolderBase]: 6171/10140 cut-off events. [2024-06-21 20:38:20,622 INFO L125 PetriNetUnfolderBase]: For 1529718/1529939 co-relation queries the response was YES. [2024-06-21 20:38:20,734 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90090 conditions, 10140 events. 6171/10140 cut-off events. For 1529718/1529939 co-relation queries the response was YES. Maximal size of possible extension queue 759. Compared 71707 event pairs, 1472 based on Foata normal form. 111/10018 useless extension candidates. Maximal degree in co-relation 89916. Up to 8312 conditions per place. [2024-06-21 20:38:20,914 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 1062 selfloop transitions, 48 changer transitions 0/1313 dead transitions. [2024-06-21 20:38:20,914 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 453 places, 1313 transitions, 24027 flow [2024-06-21 20:38:20,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 20:38:20,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 20:38:20,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 182 transitions. [2024-06-21 20:38:20,915 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4595959595959596 [2024-06-21 20:38:20,915 INFO L175 Difference]: Start difference. First operand has 445 places, 1286 transitions, 21629 flow. Second operand 9 states and 182 transitions. [2024-06-21 20:38:20,916 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 453 places, 1313 transitions, 24027 flow [2024-06-21 20:38:24,482 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 446 places, 1313 transitions, 23749 flow, removed 39 selfloop flow, removed 7 redundant places. [2024-06-21 20:38:24,497 INFO L231 Difference]: Finished difference. Result has 447 places, 1289 transitions, 21527 flow [2024-06-21 20:38:24,498 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=21351, PETRI_DIFFERENCE_MINUEND_PLACES=438, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1286, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1238, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=21527, PETRI_PLACES=447, PETRI_TRANSITIONS=1289} [2024-06-21 20:38:24,498 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 402 predicate places. [2024-06-21 20:38:24,498 INFO L495 AbstractCegarLoop]: Abstraction has has 447 places, 1289 transitions, 21527 flow [2024-06-21 20:38:24,498 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 20:38:24,498 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:38:24,498 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 20:38:24,498 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118 [2024-06-21 20:38:24,498 INFO L420 AbstractCegarLoop]: === Iteration 120 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:38:24,499 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:38:24,499 INFO L85 PathProgramCache]: Analyzing trace with hash -1530938767, now seen corresponding path program 10 times [2024-06-21 20:38:24,499 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:38:24,499 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [960593758] [2024-06-21 20:38:24,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:38:24,499 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:38:24,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:38:25,525 INFO 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 20:38:25,525 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:38:25,525 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [960593758] [2024-06-21 20:38:25,525 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [960593758] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:38:25,525 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:38:25,525 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 20:38:25,525 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2141017263] [2024-06-21 20:38:25,526 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:38:25,526 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 20:38:25,526 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:38:25,526 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 20:38:25,526 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2024-06-21 20:38:25,634 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-21 20:38:25,634 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 447 places, 1289 transitions, 21527 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 20:38:25,634 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:38:25,634 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-21 20:38:25,634 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:38:29,686 INFO L124 PetriNetUnfolderBase]: 7457/11943 cut-off events. [2024-06-21 20:38:29,686 INFO L125 PetriNetUnfolderBase]: For 1397133/1397137 co-relation queries the response was YES. [2024-06-21 20:38:29,812 INFO L83 FinitePrefix]: Finished finitePrefix Result has 101169 conditions, 11943 events. 7457/11943 cut-off events. For 1397133/1397137 co-relation queries the response was YES. Maximal size of possible extension queue 848. Compared 82761 event pairs, 1561 based on Foata normal form. 12/11953 useless extension candidates. Maximal degree in co-relation 100994. Up to 10629 conditions per place. [2024-06-21 20:38:29,866 INFO L140 encePairwiseOnDemand]: 30/44 looper letters, 1219 selfloop transitions, 113 changer transitions 0/1337 dead transitions. [2024-06-21 20:38:29,866 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 457 places, 1337 transitions, 24637 flow [2024-06-21 20:38:29,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 20:38:29,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 20:38:29,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 213 transitions. [2024-06-21 20:38:29,867 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44008264462809915 [2024-06-21 20:38:29,867 INFO L175 Difference]: Start difference. First operand has 447 places, 1289 transitions, 21527 flow. Second operand 11 states and 213 transitions. [2024-06-21 20:38:29,867 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 457 places, 1337 transitions, 24637 flow [2024-06-21 20:38:34,088 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 450 places, 1337 transitions, 24487 flow, removed 30 selfloop flow, removed 7 redundant places. [2024-06-21 20:38:34,104 INFO L231 Difference]: Finished difference. Result has 451 places, 1301 transitions, 21958 flow [2024-06-21 20:38:34,104 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=21377, PETRI_DIFFERENCE_MINUEND_PLACES=440, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1289, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=101, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1176, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=21958, PETRI_PLACES=451, PETRI_TRANSITIONS=1301} [2024-06-21 20:38:34,104 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 406 predicate places. [2024-06-21 20:38:34,104 INFO L495 AbstractCegarLoop]: Abstraction has has 451 places, 1301 transitions, 21958 flow [2024-06-21 20:38:34,104 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 20:38:34,104 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 20:38:34,105 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 20:38:34,105 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119 [2024-06-21 20:38:34,105 INFO L420 AbstractCegarLoop]: === Iteration 121 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 20:38:34,105 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 20:38:34,105 INFO L85 PathProgramCache]: Analyzing trace with hash -1533795727, now seen corresponding path program 11 times [2024-06-21 20:38:34,105 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 20:38:34,105 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1962921338] [2024-06-21 20:38:34,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 20:38:34,106 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 20:38:34,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 20:38:35,228 INFO 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 20:38:35,228 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 20:38:35,228 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1962921338] [2024-06-21 20:38:35,228 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1962921338] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 20:38:35,228 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 20:38:35,228 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 20:38:35,229 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1762083227] [2024-06-21 20:38:35,229 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 20:38:35,229 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 20:38:35,229 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 20:38:35,229 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 20:38:35,229 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2024-06-21 20:38:35,393 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-06-21 20:38:35,393 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 451 places, 1301 transitions, 21958 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 20:38:35,393 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 20:38:35,393 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-06-21 20:38:35,394 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 20:38:39,400 INFO L124 PetriNetUnfolderBase]: 7591/12157 cut-off events. [2024-06-21 20:38:39,400 INFO L125 PetriNetUnfolderBase]: For 1421721/1421725 co-relation queries the response was YES. [2024-06-21 20:38:39,537 INFO L83 FinitePrefix]: Finished finitePrefix Result has 103235 conditions, 12157 events. 7591/12157 cut-off events. For 1421721/1421725 co-relation queries the response was YES. Maximal size of possible extension queue 876. Compared 84625 event pairs, 1559 based on Foata normal form. 10/12165 useless extension candidates. Maximal degree in co-relation 103059. Up to 10698 conditions per place. [2024-06-21 20:38:39,603 INFO L140 encePairwiseOnDemand]: 30/44 looper letters, 1225 selfloop transitions, 135 changer transitions 0/1365 dead transitions. [2024-06-21 20:38:39,603 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 462 places, 1365 transitions, 25217 flow [2024-06-21 20:38:39,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 20:38:39,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 20:38:39,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 232 transitions. [2024-06-21 20:38:39,604 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4393939393939394 [2024-06-21 20:38:39,604 INFO L175 Difference]: Start difference. First operand has 451 places, 1301 transitions, 21958 flow. Second operand 12 states and 232 transitions. [2024-06-21 20:38:39,604 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 462 places, 1365 transitions, 25217 flow