./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/mix020.oepc.i --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --validate ./goblint.2024-05-21_14-57-05.files/protection/mix020.oepc.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version bcb38a6f Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReachWitnessValidation.xml -i ../../../trunk/examples/svcomp/pthread-wmm/mix020.oepc.i ./goblint.2024-05-21_14-57-05.files/protection/mix020.oepc.yml/witness.yml -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --traceabstraction.compute.hoare.annotation.of.negated.interpolant.automaton,.abstraction.and.cfg false --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.fs.goblint-validation-bcb38a6-m [2024-06-03 19:24:14,497 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-03 19:24:14,540 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-03 19:24:14,543 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-03 19:24:14,544 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-03 19:24:14,562 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-03 19:24:14,562 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-03 19:24:14,562 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-03 19:24:14,563 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-03 19:24:14,563 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-03 19:24:14,563 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-03 19:24:14,564 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-03 19:24:14,564 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-03 19:24:14,564 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-03 19:24:14,564 INFO L153 SettingsManager]: * Use SBE=true [2024-06-03 19:24:14,565 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-03 19:24:14,565 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-03 19:24:14,565 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-03 19:24:14,565 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-03 19:24:14,565 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-03 19:24:14,566 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-03 19:24:14,572 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-03 19:24:14,572 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-03 19:24:14,572 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-03 19:24:14,573 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-03 19:24:14,573 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-03 19:24:14,573 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-03 19:24:14,573 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-03 19:24:14,573 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-03 19:24:14,573 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-03 19:24:14,574 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-03 19:24:14,574 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-03 19:24:14,574 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-03 19:24:14,574 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-03 19:24:14,574 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-03 19:24:14,574 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-03 19:24:14,575 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-03 19:24:14,575 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-03 19:24:14,575 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-03 19:24:14,575 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-03 19:24:14,575 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-03 19:24:14,576 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-03 19:24:14,576 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-03 19:24:14,576 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-03 19:24:14,757 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-03 19:24:14,777 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-03 19:24:14,779 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-03 19:24:14,780 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-03 19:24:14,780 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-03 19:24:14,781 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-05-21_14-57-05.files/protection/mix020.oepc.yml/witness.yml [2024-06-03 19:24:14,987 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-03 19:24:14,987 INFO L274 PluginConnector]: CDTParser initialized [2024-06-03 19:24:14,988 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/mix020.oepc.i [2024-06-03 19:24:16,041 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-03 19:24:16,242 INFO L384 CDTParser]: Found 1 translation units. [2024-06-03 19:24:16,243 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/mix020.oepc.i [2024-06-03 19:24:16,264 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d89bf1977/94190c15c25441b2a6a737e5459fb2bc/FLAGcbe45f5fd [2024-06-03 19:24:16,277 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d89bf1977/94190c15c25441b2a6a737e5459fb2bc [2024-06-03 19:24:16,278 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-03 19:24:16,279 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-03 19:24:16,282 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-03 19:24:16,282 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-03 19:24:16,285 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-03 19:24:16,286 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 03.06 07:24:14" (1/2) ... [2024-06-03 19:24:16,287 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1fa4eb08 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 07:24:16, skipping insertion in model container [2024-06-03 19:24:16,287 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 03.06 07:24:14" (1/2) ... [2024-06-03 19:24:16,288 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@2d996d1b and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 07:24:16, skipping insertion in model container [2024-06-03 19:24:16,289 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.06 07:24:16" (2/2) ... [2024-06-03 19:24:16,289 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1fa4eb08 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 07:24:16, skipping insertion in model container [2024-06-03 19:24:16,289 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.06 07:24:16" (2/2) ... [2024-06-03 19:24:16,289 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-03 19:24:16,384 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-03 19:24:16,385 INFO L97 edCorrectnessWitness]: Location invariant before [L874-L874] ((((((((((((((((((((((! multithreaded || ((0 <= a$w_buff1 && a$w_buff1 <= 1) && (a$w_buff1 == 0 || a$w_buff1 == 1))) && (! multithreaded || ((0 <= a$mem_tmp && a$mem_tmp <= 1) && (a$mem_tmp == 0 || a$mem_tmp == 1)))) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1)))) && (! multithreaded || ((0 <= a && a <= 1) && (a == 0 || a == 1)))) && (! multithreaded || ((0 <= a$w_buff0 && a$w_buff0 <= 1) && (a$w_buff0 == 0 || a$w_buff0 == 1)))) && (! multithreaded || (((0 <= y && y <= 2) && y <= 127) && ((y == 0 || y == 1) || y == 2)))) && (! multithreaded || ((0 <= __unbuffered_p3_EBX && __unbuffered_p3_EBX <= 1) && (__unbuffered_p3_EBX == 0 || __unbuffered_p3_EBX == 1)))) && (! multithreaded || a$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || a$read_delayed == (_Bool)0)) && (! multithreaded || a$read_delayed_var == 0)) && (! multithreaded || a$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || ((0 <= z && z <= 1) && (z == 0 || z == 1)))) && (! multithreaded || a$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || a$r_buff1_thd4 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || a$r_buff0_thd4 == (_Bool)0)) && (! multithreaded || a$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 1) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || a$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || a$flush_delayed == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p3_EAX && __unbuffered_p3_EAX <= 1) && (__unbuffered_p3_EAX == 0 || __unbuffered_p3_EAX == 1)))) && (! multithreaded || a$r_buff0_thd3 == (_Bool)0) [2024-06-03 19:24:16,385 INFO L97 edCorrectnessWitness]: Location invariant before [L871-L871] ((((((((((((((((((((((! multithreaded || ((0 <= a$w_buff1 && a$w_buff1 <= 1) && (a$w_buff1 == 0 || a$w_buff1 == 1))) && (! multithreaded || ((0 <= a$mem_tmp && a$mem_tmp <= 1) && (a$mem_tmp == 0 || a$mem_tmp == 1)))) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1)))) && (! multithreaded || ((0 <= a && a <= 1) && (a == 0 || a == 1)))) && (! multithreaded || ((0 <= a$w_buff0 && a$w_buff0 <= 1) && (a$w_buff0 == 0 || a$w_buff0 == 1)))) && (! multithreaded || (((0 <= y && y <= 2) && y <= 127) && ((y == 0 || y == 1) || y == 2)))) && (! multithreaded || ((0 <= __unbuffered_p3_EBX && __unbuffered_p3_EBX <= 1) && (__unbuffered_p3_EBX == 0 || __unbuffered_p3_EBX == 1)))) && (! multithreaded || a$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || a$read_delayed == (_Bool)0)) && (! multithreaded || a$read_delayed_var == 0)) && (! multithreaded || a$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || ((0 <= z && z <= 1) && (z == 0 || z == 1)))) && (! multithreaded || a$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || a$r_buff1_thd4 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || a$r_buff0_thd4 == (_Bool)0)) && (! multithreaded || a$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 1) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || a$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || a$flush_delayed == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p3_EAX && __unbuffered_p3_EAX <= 1) && (__unbuffered_p3_EAX == 0 || __unbuffered_p3_EAX == 1)))) && (! multithreaded || a$r_buff0_thd3 == (_Bool)0) [2024-06-03 19:24:16,385 INFO L97 edCorrectnessWitness]: Location invariant before [L869-L869] ((((((((((((((((((((((! multithreaded || ((0 <= a$w_buff1 && a$w_buff1 <= 1) && (a$w_buff1 == 0 || a$w_buff1 == 1))) && (! multithreaded || ((0 <= a$mem_tmp && a$mem_tmp <= 1) && (a$mem_tmp == 0 || a$mem_tmp == 1)))) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1)))) && (! multithreaded || ((0 <= a && a <= 1) && (a == 0 || a == 1)))) && (! multithreaded || ((0 <= a$w_buff0 && a$w_buff0 <= 1) && (a$w_buff0 == 0 || a$w_buff0 == 1)))) && (! multithreaded || (((0 <= y && y <= 2) && y <= 127) && ((y == 0 || y == 1) || y == 2)))) && (! multithreaded || ((0 <= __unbuffered_p3_EBX && __unbuffered_p3_EBX <= 1) && (__unbuffered_p3_EBX == 0 || __unbuffered_p3_EBX == 1)))) && (! multithreaded || a$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || a$read_delayed == (_Bool)0)) && (! multithreaded || a$read_delayed_var == 0)) && (! multithreaded || a$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || ((0 <= z && z <= 1) && (z == 0 || z == 1)))) && (! multithreaded || a$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || a$r_buff1_thd4 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || a$r_buff0_thd4 == (_Bool)0)) && (! multithreaded || a$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 1) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || a$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || a$flush_delayed == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p3_EAX && __unbuffered_p3_EAX <= 1) && (__unbuffered_p3_EAX == 0 || __unbuffered_p3_EAX == 1)))) && (! multithreaded || a$r_buff0_thd3 == (_Bool)0) [2024-06-03 19:24:16,385 INFO L97 edCorrectnessWitness]: Location invariant before [L873-L873] ((((((((((((((((((((((! multithreaded || ((0 <= a$w_buff1 && a$w_buff1 <= 1) && (a$w_buff1 == 0 || a$w_buff1 == 1))) && (! multithreaded || ((0 <= a$mem_tmp && a$mem_tmp <= 1) && (a$mem_tmp == 0 || a$mem_tmp == 1)))) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1)))) && (! multithreaded || ((0 <= a && a <= 1) && (a == 0 || a == 1)))) && (! multithreaded || ((0 <= a$w_buff0 && a$w_buff0 <= 1) && (a$w_buff0 == 0 || a$w_buff0 == 1)))) && (! multithreaded || (((0 <= y && y <= 2) && y <= 127) && ((y == 0 || y == 1) || y == 2)))) && (! multithreaded || ((0 <= __unbuffered_p3_EBX && __unbuffered_p3_EBX <= 1) && (__unbuffered_p3_EBX == 0 || __unbuffered_p3_EBX == 1)))) && (! multithreaded || a$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || a$read_delayed == (_Bool)0)) && (! multithreaded || a$read_delayed_var == 0)) && (! multithreaded || a$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || ((0 <= z && z <= 1) && (z == 0 || z == 1)))) && (! multithreaded || a$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || a$r_buff1_thd4 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || a$r_buff0_thd4 == (_Bool)0)) && (! multithreaded || a$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 1) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || a$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || a$flush_delayed == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p3_EAX && __unbuffered_p3_EAX <= 1) && (__unbuffered_p3_EAX == 0 || __unbuffered_p3_EAX == 1)))) && (! multithreaded || a$r_buff0_thd3 == (_Bool)0) [2024-06-03 19:24:16,385 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-03 19:24:16,385 INFO L106 edCorrectnessWitness]: ghost_update [L867-L867] multithreaded = 1; [2024-06-03 19:24:16,421 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-03 19:24:16,711 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-03 19:24:16,721 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-03 19:24:16,828 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-03 19:24:16,867 INFO L206 MainTranslator]: Completed translation [2024-06-03 19:24:16,867 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 07:24:16 WrapperNode [2024-06-03 19:24:16,867 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-03 19:24:16,871 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-03 19:24:16,871 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-03 19:24:16,871 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-03 19:24:16,876 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 07:24:16" (1/1) ... [2024-06-03 19:24:16,901 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 07:24:16" (1/1) ... [2024-06-03 19:24:16,968 INFO L138 Inliner]: procedures = 176, calls = 54, calls flagged for inlining = 6, calls inlined = 7, statements flattened = 139 [2024-06-03 19:24:16,969 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-03 19:24:16,970 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-03 19:24:16,970 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-03 19:24:16,970 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-03 19:24:16,979 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 07:24:16" (1/1) ... [2024-06-03 19:24:16,979 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 07:24:16" (1/1) ... [2024-06-03 19:24:16,992 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 07:24:16" (1/1) ... [2024-06-03 19:24:17,010 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2024-06-03 19:24:17,020 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 07:24:16" (1/1) ... [2024-06-03 19:24:17,020 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 07:24:16" (1/1) ... [2024-06-03 19:24:17,031 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 07:24:16" (1/1) ... [2024-06-03 19:24:17,043 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 07:24:16" (1/1) ... [2024-06-03 19:24:17,045 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 07:24:16" (1/1) ... [2024-06-03 19:24:17,051 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 07:24:16" (1/1) ... [2024-06-03 19:24:17,055 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-03 19:24:17,058 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-03 19:24:17,058 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-03 19:24:17,058 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-03 19:24:17,059 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 07:24:16" (1/1) ... [2024-06-03 19:24:17,063 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-03 19:24:17,075 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-03 19:24:17,088 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-06-03 19:24:17,095 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-06-03 19:24:17,120 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-03 19:24:17,120 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-03 19:24:17,120 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-03 19:24:17,121 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-03 19:24:17,121 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-03 19:24:17,121 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-03 19:24:17,121 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-03 19:24:17,122 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-03 19:24:17,122 INFO L130 BoogieDeclarations]: Found specification of procedure P3 [2024-06-03 19:24:17,122 INFO L138 BoogieDeclarations]: Found implementation of procedure P3 [2024-06-03 19:24:17,122 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-03 19:24:17,122 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-03 19:24:17,122 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-03 19:24:17,123 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-03 19:24:17,124 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-03 19:24:17,232 INFO L244 CfgBuilder]: Building ICFG [2024-06-03 19:24:17,234 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-03 19:24:17,577 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-03 19:24:17,577 INFO L293 CfgBuilder]: Performing block encoding [2024-06-03 19:24:17,739 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-03 19:24:17,739 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-03 19:24:17,740 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.06 07:24:17 BoogieIcfgContainer [2024-06-03 19:24:17,740 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-03 19:24:17,742 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-03 19:24:17,742 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-03 19:24:17,745 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-03 19:24:17,745 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 03.06 07:24:14" (1/4) ... [2024-06-03 19:24:17,745 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6f9a27fa and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 03.06 07:24:17, skipping insertion in model container [2024-06-03 19:24:17,745 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.06 07:24:16" (2/4) ... [2024-06-03 19:24:17,745 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6f9a27fa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.06 07:24:17, skipping insertion in model container [2024-06-03 19:24:17,746 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 07:24:16" (3/4) ... [2024-06-03 19:24:17,746 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6f9a27fa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.06 07:24:17, skipping insertion in model container [2024-06-03 19:24:17,746 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.06 07:24:17" (4/4) ... [2024-06-03 19:24:17,747 INFO L112 eAbstractionObserver]: Analyzing ICFG mix020.oepc.i [2024-06-03 19:24:17,759 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-03 19:24:17,760 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 4 error locations. [2024-06-03 19:24:17,760 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-03 19:24:17,827 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-03 19:24:17,853 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 66 places, 53 transitions, 122 flow [2024-06-03 19:24:17,876 INFO L124 PetriNetUnfolderBase]: 0/49 cut-off events. [2024-06-03 19:24:17,876 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-03 19:24:17,878 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62 conditions, 49 events. 0/49 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 83 event pairs, 0 based on Foata normal form. 0/45 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2024-06-03 19:24:17,878 INFO L82 GeneralOperation]: Start removeDead. Operand has 66 places, 53 transitions, 122 flow [2024-06-03 19:24:17,881 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 56 places, 43 transitions, 98 flow [2024-06-03 19:24:17,887 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-03 19:24:17,891 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;@3b06bce3, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-03 19:24:17,891 INFO L358 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2024-06-03 19:24:17,894 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-03 19:24:17,894 INFO L124 PetriNetUnfolderBase]: 0/6 cut-off events. [2024-06-03 19:24:17,894 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-03 19:24:17,895 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:24:17,895 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-06-03 19:24:17,895 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-03 19:24:17,899 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:24:17,899 INFO L85 PathProgramCache]: Analyzing trace with hash -450440332, now seen corresponding path program 1 times [2024-06-03 19:24:17,905 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:24:17,905 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1036513414] [2024-06-03 19:24:17,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:24:17,906 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:24:18,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:24:18,986 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:24:18,987 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:24:18,987 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1036513414] [2024-06-03 19:24:18,988 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1036513414] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:24:18,988 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:24:18,989 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-03 19:24:18,990 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [536012164] [2024-06-03 19:24:18,990 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:24:18,996 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-03 19:24:18,999 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:24:19,022 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-03 19:24:19,023 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-03 19:24:19,077 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 53 [2024-06-03 19:24:19,080 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 43 transitions, 98 flow. Second operand has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:24:19,080 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:24:19,080 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 53 [2024-06-03 19:24:19,081 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:24:20,551 INFO L124 PetriNetUnfolderBase]: 9583/13402 cut-off events. [2024-06-03 19:24:20,551 INFO L125 PetriNetUnfolderBase]: For 182/182 co-relation queries the response was YES. [2024-06-03 19:24:20,570 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26802 conditions, 13402 events. 9583/13402 cut-off events. For 182/182 co-relation queries the response was YES. Maximal size of possible extension queue 480. Compared 73458 event pairs, 7347 based on Foata normal form. 1/13218 useless extension candidates. Maximal degree in co-relation 26786. Up to 13009 conditions per place. [2024-06-03 19:24:20,629 INFO L140 encePairwiseOnDemand]: 44/53 looper letters, 45 selfloop transitions, 5 changer transitions 0/57 dead transitions. [2024-06-03 19:24:20,629 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 57 transitions, 235 flow [2024-06-03 19:24:20,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-03 19:24:20,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-03 19:24:20,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 96 transitions. [2024-06-03 19:24:20,638 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6037735849056604 [2024-06-03 19:24:20,639 INFO L175 Difference]: Start difference. First operand has 56 places, 43 transitions, 98 flow. Second operand 3 states and 96 transitions. [2024-06-03 19:24:20,640 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 57 transitions, 235 flow [2024-06-03 19:24:20,642 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 57 transitions, 228 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-06-03 19:24:20,656 INFO L231 Difference]: Finished difference. Result has 55 places, 47 transitions, 133 flow [2024-06-03 19:24:20,658 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=94, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=133, PETRI_PLACES=55, PETRI_TRANSITIONS=47} [2024-06-03 19:24:20,660 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, -1 predicate places. [2024-06-03 19:24:20,661 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 47 transitions, 133 flow [2024-06-03 19:24:20,661 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:24:20,661 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:24:20,661 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:24:20,661 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-03 19:24:20,662 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-03 19:24:20,662 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:24:20,662 INFO L85 PathProgramCache]: Analyzing trace with hash 918560787, now seen corresponding path program 1 times [2024-06-03 19:24:20,662 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:24:20,662 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [499412749] [2024-06-03 19:24:20,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:24:20,663 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:24:20,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:24:21,415 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:24:21,416 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:24:21,416 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [499412749] [2024-06-03 19:24:21,416 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [499412749] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:24:21,416 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:24:21,416 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-03 19:24:21,416 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1972363221] [2024-06-03 19:24:21,417 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:24:21,417 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-03 19:24:21,418 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:24:21,418 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-03 19:24:21,418 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-06-03 19:24:21,472 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 53 [2024-06-03 19:24:21,480 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 47 transitions, 133 flow. Second operand has 4 states, 4 states have (on average 15.75) internal successors, (63), 4 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:24:21,481 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:24:21,481 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 53 [2024-06-03 19:24:21,481 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:24:22,836 INFO L124 PetriNetUnfolderBase]: 9573/13388 cut-off events. [2024-06-03 19:24:22,836 INFO L125 PetriNetUnfolderBase]: For 2477/2477 co-relation queries the response was YES. [2024-06-03 19:24:22,851 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30228 conditions, 13388 events. 9573/13388 cut-off events. For 2477/2477 co-relation queries the response was YES. Maximal size of possible extension queue 480. Compared 73509 event pairs, 6546 based on Foata normal form. 4/13389 useless extension candidates. Maximal degree in co-relation 30213. Up to 12974 conditions per place. [2024-06-03 19:24:22,919 INFO L140 encePairwiseOnDemand]: 43/53 looper letters, 55 selfloop transitions, 9 changer transitions 0/71 dead transitions. [2024-06-03 19:24:22,919 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 71 transitions, 327 flow [2024-06-03 19:24:22,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-03 19:24:22,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-03 19:24:22,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 124 transitions. [2024-06-03 19:24:22,921 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5849056603773585 [2024-06-03 19:24:22,921 INFO L175 Difference]: Start difference. First operand has 55 places, 47 transitions, 133 flow. Second operand 4 states and 124 transitions. [2024-06-03 19:24:22,921 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 71 transitions, 327 flow [2024-06-03 19:24:22,926 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 71 transitions, 322 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-03 19:24:22,927 INFO L231 Difference]: Finished difference. Result has 58 places, 51 transitions, 181 flow [2024-06-03 19:24:22,927 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=128, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=181, PETRI_PLACES=58, PETRI_TRANSITIONS=51} [2024-06-03 19:24:22,928 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 2 predicate places. [2024-06-03 19:24:22,928 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 51 transitions, 181 flow [2024-06-03 19:24:22,928 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.75) internal successors, (63), 4 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:24:22,928 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:24:22,929 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:24:22,929 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-03 19:24:22,929 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-03 19:24:22,929 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:24:22,930 INFO L85 PathProgramCache]: Analyzing trace with hash -2026321742, now seen corresponding path program 1 times [2024-06-03 19:24:22,930 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:24:22,930 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1569955878] [2024-06-03 19:24:22,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:24:22,930 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:24:22,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:24:24,005 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:24:24,006 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:24:24,007 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1569955878] [2024-06-03 19:24:24,007 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1569955878] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:24:24,007 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:24:24,007 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-03 19:24:24,007 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1349718465] [2024-06-03 19:24:24,007 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:24:24,008 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-03 19:24:24,008 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:24:24,009 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-03 19:24:24,009 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-06-03 19:24:24,075 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 53 [2024-06-03 19:24:24,075 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 51 transitions, 181 flow. Second operand has 6 states, 6 states have (on average 14.5) internal successors, (87), 6 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:24:24,075 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:24:24,075 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 53 [2024-06-03 19:24:24,075 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:24:25,608 INFO L124 PetriNetUnfolderBase]: 11609/16162 cut-off events. [2024-06-03 19:24:25,609 INFO L125 PetriNetUnfolderBase]: For 8177/8177 co-relation queries the response was YES. [2024-06-03 19:24:25,630 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40315 conditions, 16162 events. 11609/16162 cut-off events. For 8177/8177 co-relation queries the response was YES. Maximal size of possible extension queue 562. Compared 88882 event pairs, 6715 based on Foata normal form. 4/16163 useless extension candidates. Maximal degree in co-relation 40298. Up to 15648 conditions per place. [2024-06-03 19:24:25,684 INFO L140 encePairwiseOnDemand]: 41/53 looper letters, 76 selfloop transitions, 17 changer transitions 0/99 dead transitions. [2024-06-03 19:24:25,684 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 99 transitions, 514 flow [2024-06-03 19:24:25,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 19:24:25,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 19:24:25,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 175 transitions. [2024-06-03 19:24:25,686 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.550314465408805 [2024-06-03 19:24:25,686 INFO L175 Difference]: Start difference. First operand has 58 places, 51 transitions, 181 flow. Second operand 6 states and 175 transitions. [2024-06-03 19:24:25,686 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 99 transitions, 514 flow [2024-06-03 19:24:25,688 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 99 transitions, 486 flow, removed 6 selfloop flow, removed 2 redundant places. [2024-06-03 19:24:25,689 INFO L231 Difference]: Finished difference. Result has 63 places, 59 transitions, 258 flow [2024-06-03 19:24:25,689 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=162, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=258, PETRI_PLACES=63, PETRI_TRANSITIONS=59} [2024-06-03 19:24:25,690 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 7 predicate places. [2024-06-03 19:24:25,690 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 59 transitions, 258 flow [2024-06-03 19:24:25,690 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.5) internal successors, (87), 6 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:24:25,690 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:24:25,691 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:24:25,691 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-03 19:24:25,691 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-03 19:24:25,691 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:24:25,691 INFO L85 PathProgramCache]: Analyzing trace with hash 1608536278, now seen corresponding path program 1 times [2024-06-03 19:24:25,692 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:24:25,692 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1234618426] [2024-06-03 19:24:25,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:24:25,692 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:24:25,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:24:26,811 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:24:26,812 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:24:26,815 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1234618426] [2024-06-03 19:24:26,815 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1234618426] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:24:26,816 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:24:26,816 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 19:24:26,816 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1418283681] [2024-06-03 19:24:26,816 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:24:26,817 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 19:24:26,817 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:24:26,818 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 19:24:26,818 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-06-03 19:24:26,922 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 53 [2024-06-03 19:24:26,922 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 59 transitions, 258 flow. Second operand has 7 states, 7 states have (on average 14.428571428571429) internal successors, (101), 7 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:24:26,922 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:24:26,922 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 53 [2024-06-03 19:24:26,922 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:24:28,650 INFO L124 PetriNetUnfolderBase]: 11593/16134 cut-off events. [2024-06-03 19:24:28,651 INFO L125 PetriNetUnfolderBase]: For 16521/16521 co-relation queries the response was YES. [2024-06-03 19:24:28,680 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44839 conditions, 16134 events. 11593/16134 cut-off events. For 16521/16521 co-relation queries the response was YES. Maximal size of possible extension queue 562. Compared 88657 event pairs, 5796 based on Foata normal form. 8/16139 useless extension candidates. Maximal degree in co-relation 44820. Up to 15582 conditions per place. [2024-06-03 19:24:28,746 INFO L140 encePairwiseOnDemand]: 41/53 looper letters, 83 selfloop transitions, 20 changer transitions 0/109 dead transitions. [2024-06-03 19:24:28,746 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 109 transitions, 604 flow [2024-06-03 19:24:28,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 19:24:28,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 19:24:28,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 198 transitions. [2024-06-03 19:24:28,748 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5336927223719676 [2024-06-03 19:24:28,748 INFO L175 Difference]: Start difference. First operand has 63 places, 59 transitions, 258 flow. Second operand 7 states and 198 transitions. [2024-06-03 19:24:28,748 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 109 transitions, 604 flow [2024-06-03 19:24:28,753 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 109 transitions, 565 flow, removed 6 selfloop flow, removed 3 redundant places. [2024-06-03 19:24:28,755 INFO L231 Difference]: Finished difference. Result has 66 places, 61 transitions, 291 flow [2024-06-03 19:24:28,755 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=211, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=291, PETRI_PLACES=66, PETRI_TRANSITIONS=61} [2024-06-03 19:24:28,756 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 10 predicate places. [2024-06-03 19:24:28,756 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 61 transitions, 291 flow [2024-06-03 19:24:28,757 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.428571428571429) internal successors, (101), 7 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:24:28,757 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:24:28,757 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:24:28,757 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-03 19:24:28,757 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-03 19:24:28,758 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:24:28,758 INFO L85 PathProgramCache]: Analyzing trace with hash 1375156545, now seen corresponding path program 1 times [2024-06-03 19:24:28,758 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:24:28,758 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1076842221] [2024-06-03 19:24:28,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:24:28,758 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:24:28,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:24:29,469 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:24:29,469 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:24:29,470 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1076842221] [2024-06-03 19:24:29,470 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1076842221] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:24:29,470 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:24:29,470 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-03 19:24:29,470 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [437485129] [2024-06-03 19:24:29,470 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:24:29,471 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-03 19:24:29,471 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:24:29,471 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-03 19:24:29,472 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-03 19:24:29,537 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 53 [2024-06-03 19:24:29,538 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 61 transitions, 291 flow. Second operand has 6 states, 6 states have (on average 13.666666666666666) internal successors, (82), 6 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:24:29,538 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:24:29,538 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 53 [2024-06-03 19:24:29,538 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:24:31,048 INFO L124 PetriNetUnfolderBase]: 11584/16154 cut-off events. [2024-06-03 19:24:31,048 INFO L125 PetriNetUnfolderBase]: For 25790/25790 co-relation queries the response was YES. [2024-06-03 19:24:31,073 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48041 conditions, 16154 events. 11584/16154 cut-off events. For 25790/25790 co-relation queries the response was YES. Maximal size of possible extension queue 560. Compared 88919 event pairs, 6342 based on Foata normal form. 3/16154 useless extension candidates. Maximal degree in co-relation 48021. Up to 15660 conditions per place. [2024-06-03 19:24:31,130 INFO L140 encePairwiseOnDemand]: 43/53 looper letters, 66 selfloop transitions, 10 changer transitions 0/82 dead transitions. [2024-06-03 19:24:31,130 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 82 transitions, 513 flow [2024-06-03 19:24:31,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-03 19:24:31,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-03 19:24:31,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 124 transitions. [2024-06-03 19:24:31,131 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4679245283018868 [2024-06-03 19:24:31,131 INFO L175 Difference]: Start difference. First operand has 66 places, 61 transitions, 291 flow. Second operand 5 states and 124 transitions. [2024-06-03 19:24:31,131 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 82 transitions, 513 flow [2024-06-03 19:24:31,136 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 82 transitions, 459 flow, removed 9 selfloop flow, removed 5 redundant places. [2024-06-03 19:24:31,137 INFO L231 Difference]: Finished difference. Result has 66 places, 65 transitions, 302 flow [2024-06-03 19:24:31,137 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=237, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=302, PETRI_PLACES=66, PETRI_TRANSITIONS=65} [2024-06-03 19:24:31,138 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 10 predicate places. [2024-06-03 19:24:31,138 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 65 transitions, 302 flow [2024-06-03 19:24:31,138 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.666666666666666) internal successors, (82), 6 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:24:31,138 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:24:31,139 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:24:31,139 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-03 19:24:31,139 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-03 19:24:31,139 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:24:31,139 INFO L85 PathProgramCache]: Analyzing trace with hash -319818651, now seen corresponding path program 1 times [2024-06-03 19:24:31,139 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:24:31,140 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [99583345] [2024-06-03 19:24:31,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:24:31,140 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:24:31,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:24:31,917 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:24:31,917 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:24:31,917 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [99583345] [2024-06-03 19:24:31,917 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [99583345] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:24:31,917 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:24:31,917 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 19:24:31,917 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1975283602] [2024-06-03 19:24:31,917 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:24:31,918 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 19:24:31,918 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:24:31,918 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 19:24:31,918 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-03 19:24:31,994 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 53 [2024-06-03 19:24:31,995 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 65 transitions, 302 flow. Second operand has 7 states, 7 states have (on average 13.571428571428571) internal successors, (95), 7 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:24:31,995 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:24:31,995 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 53 [2024-06-03 19:24:31,995 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:24:33,552 INFO L124 PetriNetUnfolderBase]: 11650/16443 cut-off events. [2024-06-03 19:24:33,553 INFO L125 PetriNetUnfolderBase]: For 37059/37059 co-relation queries the response was YES. [2024-06-03 19:24:33,581 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52203 conditions, 16443 events. 11650/16443 cut-off events. For 37059/37059 co-relation queries the response was YES. Maximal size of possible extension queue 575. Compared 91963 event pairs, 6009 based on Foata normal form. 14/16451 useless extension candidates. Maximal degree in co-relation 52181. Up to 15536 conditions per place. [2024-06-03 19:24:33,636 INFO L140 encePairwiseOnDemand]: 41/53 looper letters, 84 selfloop transitions, 22 changer transitions 0/112 dead transitions. [2024-06-03 19:24:33,636 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 112 transitions, 724 flow [2024-06-03 19:24:33,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 19:24:33,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 19:24:33,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 160 transitions. [2024-06-03 19:24:33,637 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5031446540880503 [2024-06-03 19:24:33,638 INFO L175 Difference]: Start difference. First operand has 66 places, 65 transitions, 302 flow. Second operand 6 states and 160 transitions. [2024-06-03 19:24:33,638 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 112 transitions, 724 flow [2024-06-03 19:24:33,644 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 112 transitions, 691 flow, removed 9 selfloop flow, removed 3 redundant places. [2024-06-03 19:24:33,645 INFO L231 Difference]: Finished difference. Result has 71 places, 79 transitions, 449 flow [2024-06-03 19:24:33,646 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=269, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=449, PETRI_PLACES=71, PETRI_TRANSITIONS=79} [2024-06-03 19:24:33,646 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 15 predicate places. [2024-06-03 19:24:33,646 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 79 transitions, 449 flow [2024-06-03 19:24:33,646 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.571428571428571) internal successors, (95), 7 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:24:33,647 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:24:33,647 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:24:33,647 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-03 19:24:33,647 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-03 19:24:33,647 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:24:33,647 INFO L85 PathProgramCache]: Analyzing trace with hash -1330164000, now seen corresponding path program 1 times [2024-06-03 19:24:33,648 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:24:33,648 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2090645818] [2024-06-03 19:24:33,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:24:33,648 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:24:33,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:24:34,418 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:24:34,418 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:24:34,418 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2090645818] [2024-06-03 19:24:34,418 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2090645818] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:24:34,418 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:24:34,419 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 19:24:34,419 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1208731402] [2024-06-03 19:24:34,419 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:24:34,419 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 19:24:34,419 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:24:34,419 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 19:24:34,419 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-03 19:24:34,488 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 53 [2024-06-03 19:24:34,488 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 79 transitions, 449 flow. Second operand has 7 states, 7 states have (on average 13.571428571428571) internal successors, (95), 7 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:24:34,488 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:24:34,488 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 53 [2024-06-03 19:24:34,488 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:24:35,916 INFO L124 PetriNetUnfolderBase]: 11672/16528 cut-off events. [2024-06-03 19:24:35,916 INFO L125 PetriNetUnfolderBase]: For 54502/54514 co-relation queries the response was YES. [2024-06-03 19:24:35,952 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58661 conditions, 16528 events. 11672/16528 cut-off events. For 54502/54514 co-relation queries the response was YES. Maximal size of possible extension queue 576. Compared 92759 event pairs, 6052 based on Foata normal form. 11/16534 useless extension candidates. Maximal degree in co-relation 58636. Up to 15724 conditions per place. [2024-06-03 19:24:36,014 INFO L140 encePairwiseOnDemand]: 42/53 looper letters, 90 selfloop transitions, 21 changer transitions 0/117 dead transitions. [2024-06-03 19:24:36,015 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 117 transitions, 859 flow [2024-06-03 19:24:36,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 19:24:36,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 19:24:36,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 155 transitions. [2024-06-03 19:24:36,016 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48742138364779874 [2024-06-03 19:24:36,016 INFO L175 Difference]: Start difference. First operand has 71 places, 79 transitions, 449 flow. Second operand 6 states and 155 transitions. [2024-06-03 19:24:36,016 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 117 transitions, 859 flow [2024-06-03 19:24:36,033 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 117 transitions, 833 flow, removed 12 selfloop flow, removed 1 redundant places. [2024-06-03 19:24:36,034 INFO L231 Difference]: Finished difference. Result has 76 places, 87 transitions, 560 flow [2024-06-03 19:24:36,034 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=423, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=560, PETRI_PLACES=76, PETRI_TRANSITIONS=87} [2024-06-03 19:24:36,035 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 20 predicate places. [2024-06-03 19:24:36,035 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 87 transitions, 560 flow [2024-06-03 19:24:36,035 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.571428571428571) internal successors, (95), 7 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:24:36,035 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:24:36,035 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:24:36,036 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-03 19:24:36,036 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-03 19:24:36,036 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:24:36,036 INFO L85 PathProgramCache]: Analyzing trace with hash -579972990, now seen corresponding path program 2 times [2024-06-03 19:24:36,036 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:24:36,036 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [592859102] [2024-06-03 19:24:36,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:24:36,036 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:24:36,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:24:36,784 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:24:36,784 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:24:36,784 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [592859102] [2024-06-03 19:24:36,784 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [592859102] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:24:36,784 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:24:36,784 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 19:24:36,785 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [564746617] [2024-06-03 19:24:36,785 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:24:36,785 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 19:24:36,785 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:24:36,785 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 19:24:36,785 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-03 19:24:36,856 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 53 [2024-06-03 19:24:36,856 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 87 transitions, 560 flow. Second operand has 7 states, 7 states have (on average 13.571428571428571) internal successors, (95), 7 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:24:36,856 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:24:36,856 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 53 [2024-06-03 19:24:36,857 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:24:38,408 INFO L124 PetriNetUnfolderBase]: 11663/16514 cut-off events. [2024-06-03 19:24:38,408 INFO L125 PetriNetUnfolderBase]: For 70199/70199 co-relation queries the response was YES. [2024-06-03 19:24:38,451 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62295 conditions, 16514 events. 11663/16514 cut-off events. For 70199/70199 co-relation queries the response was YES. Maximal size of possible extension queue 576. Compared 92561 event pairs, 6045 based on Foata normal form. 3/16514 useless extension candidates. Maximal degree in co-relation 62267. Up to 15751 conditions per place. [2024-06-03 19:24:38,517 INFO L140 encePairwiseOnDemand]: 42/53 looper letters, 91 selfloop transitions, 14 changer transitions 0/111 dead transitions. [2024-06-03 19:24:38,517 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 111 transitions, 832 flow [2024-06-03 19:24:38,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 19:24:38,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 19:24:38,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 147 transitions. [2024-06-03 19:24:38,518 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46226415094339623 [2024-06-03 19:24:38,518 INFO L175 Difference]: Start difference. First operand has 76 places, 87 transitions, 560 flow. Second operand 6 states and 147 transitions. [2024-06-03 19:24:38,518 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 111 transitions, 832 flow [2024-06-03 19:24:38,564 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 111 transitions, 766 flow, removed 28 selfloop flow, removed 2 redundant places. [2024-06-03 19:24:38,566 INFO L231 Difference]: Finished difference. Result has 80 places, 87 transitions, 533 flow [2024-06-03 19:24:38,566 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=494, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=533, PETRI_PLACES=80, PETRI_TRANSITIONS=87} [2024-06-03 19:24:38,566 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 24 predicate places. [2024-06-03 19:24:38,567 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 87 transitions, 533 flow [2024-06-03 19:24:38,567 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.571428571428571) internal successors, (95), 7 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:24:38,567 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:24:38,567 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:24:38,567 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-03 19:24:38,567 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-03 19:24:38,568 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:24:38,568 INFO L85 PathProgramCache]: Analyzing trace with hash -999665428, now seen corresponding path program 1 times [2024-06-03 19:24:38,568 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:24:38,568 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1205359558] [2024-06-03 19:24:38,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:24:38,568 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:24:38,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:24:39,504 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:24:39,504 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:24:39,504 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1205359558] [2024-06-03 19:24:39,504 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1205359558] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:24:39,505 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:24:39,505 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 19:24:39,505 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1083655515] [2024-06-03 19:24:39,506 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:24:39,506 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 19:24:39,506 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:24:39,506 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 19:24:39,506 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-03 19:24:39,645 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 53 [2024-06-03 19:24:39,645 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 87 transitions, 533 flow. Second operand has 8 states, 8 states have (on average 13.5) internal successors, (108), 8 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:24:39,645 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:24:39,645 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 53 [2024-06-03 19:24:39,646 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:24:41,266 INFO L124 PetriNetUnfolderBase]: 11685/16542 cut-off events. [2024-06-03 19:24:41,266 INFO L125 PetriNetUnfolderBase]: For 78150/78150 co-relation queries the response was YES. [2024-06-03 19:24:41,303 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63022 conditions, 16542 events. 11685/16542 cut-off events. For 78150/78150 co-relation queries the response was YES. Maximal size of possible extension queue 576. Compared 92737 event pairs, 5921 based on Foata normal form. 3/16542 useless extension candidates. Maximal degree in co-relation 62992. Up to 15754 conditions per place. [2024-06-03 19:24:41,365 INFO L140 encePairwiseOnDemand]: 41/53 looper letters, 104 selfloop transitions, 18 changer transitions 0/128 dead transitions. [2024-06-03 19:24:41,365 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 128 transitions, 917 flow [2024-06-03 19:24:41,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 19:24:41,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 19:24:41,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 176 transitions. [2024-06-03 19:24:41,368 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4743935309973046 [2024-06-03 19:24:41,368 INFO L175 Difference]: Start difference. First operand has 80 places, 87 transitions, 533 flow. Second operand 7 states and 176 transitions. [2024-06-03 19:24:41,368 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 128 transitions, 917 flow [2024-06-03 19:24:41,403 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 128 transitions, 873 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-06-03 19:24:41,404 INFO L231 Difference]: Finished difference. Result has 81 places, 91 transitions, 588 flow [2024-06-03 19:24:41,404 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=489, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=588, PETRI_PLACES=81, PETRI_TRANSITIONS=91} [2024-06-03 19:24:41,405 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 25 predicate places. [2024-06-03 19:24:41,405 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 91 transitions, 588 flow [2024-06-03 19:24:41,405 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.5) internal successors, (108), 8 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:24:41,405 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:24:41,405 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:24:41,405 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-03 19:24:41,405 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-03 19:24:41,406 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:24:41,406 INFO L85 PathProgramCache]: Analyzing trace with hash -1553773192, now seen corresponding path program 1 times [2024-06-03 19:24:41,406 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:24:41,406 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [174195710] [2024-06-03 19:24:41,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:24:41,406 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:24:41,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:24:42,241 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:24:42,241 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:24:42,241 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [174195710] [2024-06-03 19:24:42,241 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [174195710] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:24:42,242 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:24:42,242 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 19:24:42,242 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1775995665] [2024-06-03 19:24:42,242 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:24:42,243 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 19:24:42,244 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:24:42,245 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 19:24:42,245 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-03 19:24:42,396 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 53 [2024-06-03 19:24:42,397 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 91 transitions, 588 flow. Second operand has 8 states, 8 states have (on average 13.5) internal successors, (108), 8 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:24:42,397 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:24:42,397 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 53 [2024-06-03 19:24:42,397 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:24:43,995 INFO L124 PetriNetUnfolderBase]: 12097/17042 cut-off events. [2024-06-03 19:24:43,995 INFO L125 PetriNetUnfolderBase]: For 100741/100747 co-relation queries the response was YES. [2024-06-03 19:24:44,045 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69055 conditions, 17042 events. 12097/17042 cut-off events. For 100741/100747 co-relation queries the response was YES. Maximal size of possible extension queue 569. Compared 94770 event pairs, 5397 based on Foata normal form. 15/17047 useless extension candidates. Maximal degree in co-relation 69025. Up to 15832 conditions per place. [2024-06-03 19:24:44,114 INFO L140 encePairwiseOnDemand]: 38/53 looper letters, 123 selfloop transitions, 37 changer transitions 0/166 dead transitions. [2024-06-03 19:24:44,114 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 166 transitions, 1396 flow [2024-06-03 19:24:44,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 19:24:44,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 19:24:44,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 195 transitions. [2024-06-03 19:24:44,115 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5256064690026954 [2024-06-03 19:24:44,115 INFO L175 Difference]: Start difference. First operand has 81 places, 91 transitions, 588 flow. Second operand 7 states and 195 transitions. [2024-06-03 19:24:44,115 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 166 transitions, 1396 flow [2024-06-03 19:24:44,164 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 166 transitions, 1329 flow, removed 18 selfloop flow, removed 5 redundant places. [2024-06-03 19:24:44,166 INFO L231 Difference]: Finished difference. Result has 86 places, 114 transitions, 869 flow [2024-06-03 19:24:44,166 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=521, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=91, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=869, PETRI_PLACES=86, PETRI_TRANSITIONS=114} [2024-06-03 19:24:44,167 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 30 predicate places. [2024-06-03 19:24:44,167 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 114 transitions, 869 flow [2024-06-03 19:24:44,167 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.5) internal successors, (108), 8 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:24:44,167 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:24:44,167 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:24:44,167 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-03 19:24:44,168 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-03 19:24:44,168 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:24:44,168 INFO L85 PathProgramCache]: Analyzing trace with hash 1885292618, now seen corresponding path program 2 times [2024-06-03 19:24:44,168 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:24:44,168 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [721000067] [2024-06-03 19:24:44,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:24:44,168 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:24:44,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:24:45,020 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:24:45,020 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:24:45,024 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [721000067] [2024-06-03 19:24:45,024 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [721000067] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:24:45,024 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:24:45,024 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 19:24:45,024 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [339632170] [2024-06-03 19:24:45,024 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:24:45,024 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 19:24:45,024 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:24:45,025 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 19:24:45,025 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-03 19:24:45,111 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 53 [2024-06-03 19:24:45,111 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 114 transitions, 869 flow. Second operand has 8 states, 8 states have (on average 13.5) internal successors, (108), 8 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:24:45,111 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:24:45,111 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 53 [2024-06-03 19:24:45,111 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:24:46,894 INFO L124 PetriNetUnfolderBase]: 12119/17120 cut-off events. [2024-06-03 19:24:46,895 INFO L125 PetriNetUnfolderBase]: For 130805/130817 co-relation queries the response was YES. [2024-06-03 19:24:46,922 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77665 conditions, 17120 events. 12119/17120 cut-off events. For 130805/130817 co-relation queries the response was YES. Maximal size of possible extension queue 571. Compared 95732 event pairs, 5653 based on Foata normal form. 11/17126 useless extension candidates. Maximal degree in co-relation 77631. Up to 16250 conditions per place. [2024-06-03 19:24:46,984 INFO L140 encePairwiseOnDemand]: 41/53 looper letters, 118 selfloop transitions, 35 changer transitions 0/159 dead transitions. [2024-06-03 19:24:46,985 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 159 transitions, 1445 flow [2024-06-03 19:24:46,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 19:24:46,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 19:24:46,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 180 transitions. [2024-06-03 19:24:46,987 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48517520215633425 [2024-06-03 19:24:46,987 INFO L175 Difference]: Start difference. First operand has 86 places, 114 transitions, 869 flow. Second operand 7 states and 180 transitions. [2024-06-03 19:24:46,987 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 159 transitions, 1445 flow [2024-06-03 19:24:47,039 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 159 transitions, 1389 flow, removed 27 selfloop flow, removed 1 redundant places. [2024-06-03 19:24:47,041 INFO L231 Difference]: Finished difference. Result has 92 places, 122 transitions, 1018 flow [2024-06-03 19:24:47,041 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=813, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=114, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1018, PETRI_PLACES=92, PETRI_TRANSITIONS=122} [2024-06-03 19:24:47,041 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 36 predicate places. [2024-06-03 19:24:47,041 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 122 transitions, 1018 flow [2024-06-03 19:24:47,042 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.5) internal successors, (108), 8 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:24:47,042 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:24:47,042 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:24:47,042 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-03 19:24:47,042 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-03 19:24:47,042 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:24:47,042 INFO L85 PathProgramCache]: Analyzing trace with hash -799292092, now seen corresponding path program 2 times [2024-06-03 19:24:47,043 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:24:47,043 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [496077068] [2024-06-03 19:24:47,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:24:47,043 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:24:47,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:24:47,864 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:24:47,864 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:24:47,864 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [496077068] [2024-06-03 19:24:47,865 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [496077068] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:24:47,865 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:24:47,865 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 19:24:47,865 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1200176944] [2024-06-03 19:24:47,865 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:24:47,865 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 19:24:47,865 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:24:47,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 19:24:47,866 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-03 19:24:47,989 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 53 [2024-06-03 19:24:47,991 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 122 transitions, 1018 flow. Second operand has 8 states, 8 states have (on average 13.5) internal successors, (108), 8 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:24:47,991 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:24:47,991 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 53 [2024-06-03 19:24:47,991 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:24:49,808 INFO L124 PetriNetUnfolderBase]: 12247/17273 cut-off events. [2024-06-03 19:24:49,808 INFO L125 PetriNetUnfolderBase]: For 158053/158063 co-relation queries the response was YES. [2024-06-03 19:24:49,846 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82052 conditions, 17273 events. 12247/17273 cut-off events. For 158053/158063 co-relation queries the response was YES. Maximal size of possible extension queue 571. Compared 96310 event pairs, 5626 based on Foata normal form. 24/17292 useless extension candidates. Maximal degree in co-relation 82015. Up to 16213 conditions per place. [2024-06-03 19:24:49,913 INFO L140 encePairwiseOnDemand]: 38/53 looper letters, 142 selfloop transitions, 30 changer transitions 0/178 dead transitions. [2024-06-03 19:24:49,914 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 178 transitions, 1784 flow [2024-06-03 19:24:49,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 19:24:49,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 19:24:49,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 187 transitions. [2024-06-03 19:24:49,915 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5040431266846361 [2024-06-03 19:24:49,915 INFO L175 Difference]: Start difference. First operand has 92 places, 122 transitions, 1018 flow. Second operand 7 states and 187 transitions. [2024-06-03 19:24:49,915 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 178 transitions, 1784 flow [2024-06-03 19:24:49,999 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 178 transitions, 1708 flow, removed 28 selfloop flow, removed 3 redundant places. [2024-06-03 19:24:50,001 INFO L231 Difference]: Finished difference. Result has 98 places, 133 transitions, 1169 flow [2024-06-03 19:24:50,001 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=942, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=122, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=97, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1169, PETRI_PLACES=98, PETRI_TRANSITIONS=133} [2024-06-03 19:24:50,001 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 42 predicate places. [2024-06-03 19:24:50,002 INFO L495 AbstractCegarLoop]: Abstraction has has 98 places, 133 transitions, 1169 flow [2024-06-03 19:24:50,002 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.5) internal successors, (108), 8 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:24:50,002 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:24:50,002 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:24:50,002 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-03 19:24:50,002 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-03 19:24:50,003 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:24:50,003 INFO L85 PathProgramCache]: Analyzing trace with hash 1891959044, now seen corresponding path program 3 times [2024-06-03 19:24:50,003 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:24:50,003 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1035604576] [2024-06-03 19:24:50,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:24:50,003 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:24:50,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:24:50,718 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:24:50,718 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:24:50,718 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1035604576] [2024-06-03 19:24:50,719 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1035604576] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:24:50,719 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:24:50,719 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 19:24:50,719 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [553065881] [2024-06-03 19:24:50,719 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:24:50,719 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 19:24:50,720 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:24:50,720 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 19:24:50,720 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-03 19:24:50,816 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 53 [2024-06-03 19:24:50,817 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 133 transitions, 1169 flow. Second operand has 8 states, 8 states have (on average 13.5) internal successors, (108), 8 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:24:50,817 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:24:50,817 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 53 [2024-06-03 19:24:50,817 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:24:52,811 INFO L124 PetriNetUnfolderBase]: 12313/17366 cut-off events. [2024-06-03 19:24:52,811 INFO L125 PetriNetUnfolderBase]: For 183486/183486 co-relation queries the response was YES. [2024-06-03 19:24:52,864 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85718 conditions, 17366 events. 12313/17366 cut-off events. For 183486/183486 co-relation queries the response was YES. Maximal size of possible extension queue 571. Compared 96994 event pairs, 5640 based on Foata normal form. 14/17375 useless extension candidates. Maximal degree in co-relation 85677. Up to 16483 conditions per place. [2024-06-03 19:24:52,939 INFO L140 encePairwiseOnDemand]: 38/53 looper letters, 146 selfloop transitions, 27 changer transitions 0/179 dead transitions. [2024-06-03 19:24:52,939 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 179 transitions, 1807 flow [2024-06-03 19:24:52,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 19:24:52,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 19:24:52,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 181 transitions. [2024-06-03 19:24:52,940 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48787061994609165 [2024-06-03 19:24:52,940 INFO L175 Difference]: Start difference. First operand has 98 places, 133 transitions, 1169 flow. Second operand 7 states and 181 transitions. [2024-06-03 19:24:52,940 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 179 transitions, 1807 flow [2024-06-03 19:24:53,063 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 179 transitions, 1749 flow, removed 20 selfloop flow, removed 2 redundant places. [2024-06-03 19:24:53,065 INFO L231 Difference]: Finished difference. Result has 105 places, 142 transitions, 1309 flow [2024-06-03 19:24:53,066 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1113, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=133, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=108, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1309, PETRI_PLACES=105, PETRI_TRANSITIONS=142} [2024-06-03 19:24:53,066 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 49 predicate places. [2024-06-03 19:24:53,066 INFO L495 AbstractCegarLoop]: Abstraction has has 105 places, 142 transitions, 1309 flow [2024-06-03 19:24:53,066 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.5) internal successors, (108), 8 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:24:53,067 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:24:53,067 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:24:53,067 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-03 19:24:53,067 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-03 19:24:53,067 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:24:53,067 INFO L85 PathProgramCache]: Analyzing trace with hash 1891721708, now seen corresponding path program 3 times [2024-06-03 19:24:53,068 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:24:53,068 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [126595039] [2024-06-03 19:24:53,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:24:53,068 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:24:53,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:24:53,863 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:24:53,863 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:24:53,864 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [126595039] [2024-06-03 19:24:53,864 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [126595039] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:24:53,864 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:24:53,864 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 19:24:53,864 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1791620824] [2024-06-03 19:24:53,864 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:24:53,864 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 19:24:53,864 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:24:53,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 19:24:53,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-03 19:24:53,973 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 53 [2024-06-03 19:24:53,973 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 142 transitions, 1309 flow. Second operand has 8 states, 8 states have (on average 13.5) internal successors, (108), 8 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:24:53,973 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:24:53,973 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 53 [2024-06-03 19:24:53,973 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:24:55,973 INFO L124 PetriNetUnfolderBase]: 12304/17358 cut-off events. [2024-06-03 19:24:55,974 INFO L125 PetriNetUnfolderBase]: For 204162/204162 co-relation queries the response was YES. [2024-06-03 19:24:56,055 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87912 conditions, 17358 events. 12304/17358 cut-off events. For 204162/204162 co-relation queries the response was YES. Maximal size of possible extension queue 571. Compared 97025 event pairs, 5670 based on Foata normal form. 3/17358 useless extension candidates. Maximal degree in co-relation 87867. Up to 16588 conditions per place. [2024-06-03 19:24:56,135 INFO L140 encePairwiseOnDemand]: 41/53 looper letters, 149 selfloop transitions, 18 changer transitions 0/173 dead transitions. [2024-06-03 19:24:56,135 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 173 transitions, 1723 flow [2024-06-03 19:24:56,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 19:24:56,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 19:24:56,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 170 transitions. [2024-06-03 19:24:56,136 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4582210242587601 [2024-06-03 19:24:56,136 INFO L175 Difference]: Start difference. First operand has 105 places, 142 transitions, 1309 flow. Second operand 7 states and 170 transitions. [2024-06-03 19:24:56,136 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 173 transitions, 1723 flow [2024-06-03 19:24:56,281 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 173 transitions, 1613 flow, removed 34 selfloop flow, removed 4 redundant places. [2024-06-03 19:24:56,283 INFO L231 Difference]: Finished difference. Result has 108 places, 142 transitions, 1246 flow [2024-06-03 19:24:56,283 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1199, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=142, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=124, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1246, PETRI_PLACES=108, PETRI_TRANSITIONS=142} [2024-06-03 19:24:56,284 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 52 predicate places. [2024-06-03 19:24:56,284 INFO L495 AbstractCegarLoop]: Abstraction has has 108 places, 142 transitions, 1246 flow [2024-06-03 19:24:56,284 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.5) internal successors, (108), 8 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:24:56,284 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:24:56,284 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:24:56,284 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-03 19:24:56,284 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-03 19:24:56,285 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:24:56,285 INFO L85 PathProgramCache]: Analyzing trace with hash 1891967972, now seen corresponding path program 1 times [2024-06-03 19:24:56,285 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:24:56,285 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1479099056] [2024-06-03 19:24:56,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:24:56,285 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:24:56,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:24:57,385 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:24:57,385 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:24:57,386 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1479099056] [2024-06-03 19:24:57,386 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1479099056] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:24:57,386 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:24:57,386 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:24:57,386 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [237289232] [2024-06-03 19:24:57,386 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:24:57,386 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:24:57,387 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:24:57,387 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:24:57,387 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:24:57,542 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 53 [2024-06-03 19:24:57,542 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 142 transitions, 1246 flow. Second operand has 9 states, 9 states have (on average 13.444444444444445) internal successors, (121), 9 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:24:57,542 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:24:57,542 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 53 [2024-06-03 19:24:57,542 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:24:59,735 INFO L124 PetriNetUnfolderBase]: 12485/17606 cut-off events. [2024-06-03 19:24:59,735 INFO L125 PetriNetUnfolderBase]: For 222888/222888 co-relation queries the response was YES. [2024-06-03 19:24:59,809 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89806 conditions, 17606 events. 12485/17606 cut-off events. For 222888/222888 co-relation queries the response was YES. Maximal size of possible extension queue 572. Compared 98520 event pairs, 5508 based on Foata normal form. 30/17630 useless extension candidates. Maximal degree in co-relation 89760. Up to 16447 conditions per place. [2024-06-03 19:24:59,889 INFO L140 encePairwiseOnDemand]: 41/53 looper letters, 150 selfloop transitions, 34 changer transitions 0/190 dead transitions. [2024-06-03 19:24:59,889 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 114 places, 190 transitions, 1910 flow [2024-06-03 19:24:59,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 19:24:59,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 19:24:59,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 188 transitions. [2024-06-03 19:24:59,890 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5067385444743935 [2024-06-03 19:24:59,890 INFO L175 Difference]: Start difference. First operand has 108 places, 142 transitions, 1246 flow. Second operand 7 states and 188 transitions. [2024-06-03 19:24:59,890 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 114 places, 190 transitions, 1910 flow [2024-06-03 19:25:00,067 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 190 transitions, 1849 flow, removed 7 selfloop flow, removed 6 redundant places. [2024-06-03 19:25:00,069 INFO L231 Difference]: Finished difference. Result has 109 places, 145 transitions, 1326 flow [2024-06-03 19:25:00,069 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1185, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=142, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=108, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1326, PETRI_PLACES=109, PETRI_TRANSITIONS=145} [2024-06-03 19:25:00,070 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 53 predicate places. [2024-06-03 19:25:00,070 INFO L495 AbstractCegarLoop]: Abstraction has has 109 places, 145 transitions, 1326 flow [2024-06-03 19:25:00,070 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.444444444444445) internal successors, (121), 9 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:25:00,070 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:25:00,070 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:25:00,070 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-03 19:25:00,070 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-03 19:25:00,071 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:25:00,071 INFO L85 PathProgramCache]: Analyzing trace with hash 1050763014, now seen corresponding path program 1 times [2024-06-03 19:25:00,071 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:25:00,071 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [494887872] [2024-06-03 19:25:00,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:25:00,071 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:25:00,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:25:00,699 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:25:00,699 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:25:00,699 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [494887872] [2024-06-03 19:25:00,701 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [494887872] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:25:00,701 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:25:00,701 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-03 19:25:00,701 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1624495469] [2024-06-03 19:25:00,701 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:25:00,702 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-03 19:25:00,702 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:25:00,703 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-03 19:25:00,703 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-03 19:25:00,773 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 53 [2024-06-03 19:25:00,773 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 145 transitions, 1326 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) [2024-06-03 19:25:00,773 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:25:00,773 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 53 [2024-06-03 19:25:00,773 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:25:02,607 INFO L124 PetriNetUnfolderBase]: 11810/16633 cut-off events. [2024-06-03 19:25:02,608 INFO L125 PetriNetUnfolderBase]: For 256290/256303 co-relation queries the response was YES. [2024-06-03 19:25:02,676 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89584 conditions, 16633 events. 11810/16633 cut-off events. For 256290/256303 co-relation queries the response was YES. Maximal size of possible extension queue 560. Compared 94753 event pairs, 7126 based on Foata normal form. 14/16584 useless extension candidates. Maximal degree in co-relation 89537. Up to 15945 conditions per place. [2024-06-03 19:25:02,753 INFO L140 encePairwiseOnDemand]: 43/53 looper letters, 129 selfloop transitions, 15 changer transitions 0/160 dead transitions. [2024-06-03 19:25:02,753 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 114 places, 160 transitions, 1667 flow [2024-06-03 19:25:02,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 19:25:02,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 19:25:02,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 139 transitions. [2024-06-03 19:25:02,756 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4371069182389937 [2024-06-03 19:25:02,756 INFO L175 Difference]: Start difference. First operand has 109 places, 145 transitions, 1326 flow. Second operand 6 states and 139 transitions. [2024-06-03 19:25:02,756 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 114 places, 160 transitions, 1667 flow [2024-06-03 19:25:02,964 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 160 transitions, 1526 flow, removed 38 selfloop flow, removed 5 redundant places. [2024-06-03 19:25:02,966 INFO L231 Difference]: Finished difference. Result has 111 places, 147 transitions, 1251 flow [2024-06-03 19:25:02,966 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1187, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=145, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=131, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1251, PETRI_PLACES=111, PETRI_TRANSITIONS=147} [2024-06-03 19:25:02,966 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 55 predicate places. [2024-06-03 19:25:02,967 INFO L495 AbstractCegarLoop]: Abstraction has has 111 places, 147 transitions, 1251 flow [2024-06-03 19:25:02,967 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) [2024-06-03 19:25:02,967 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:25:02,967 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:25:02,967 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-03 19:25:02,967 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-03 19:25:02,967 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:25:02,968 INFO L85 PathProgramCache]: Analyzing trace with hash -810636059, now seen corresponding path program 1 times [2024-06-03 19:25:02,968 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:25:02,968 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1193944853] [2024-06-03 19:25:02,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:25:02,968 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:25:02,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:25:03,637 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:25:03,637 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:25:03,638 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1193944853] [2024-06-03 19:25:03,638 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1193944853] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:25:03,638 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:25:03,638 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 19:25:03,638 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [42137131] [2024-06-03 19:25:03,638 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:25:03,638 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 19:25:03,638 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:25:03,639 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 19:25:03,639 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-03 19:25:03,753 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 53 [2024-06-03 19:25:03,754 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 147 transitions, 1251 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) [2024-06-03 19:25:03,754 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:25:03,754 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 53 [2024-06-03 19:25:03,754 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:25:05,942 INFO L124 PetriNetUnfolderBase]: 12635/17820 cut-off events. [2024-06-03 19:25:05,942 INFO L125 PetriNetUnfolderBase]: For 266895/266901 co-relation queries the response was YES. [2024-06-03 19:25:06,013 INFO L83 FinitePrefix]: Finished finitePrefix Result has 94609 conditions, 17820 events. 12635/17820 cut-off events. For 266895/266901 co-relation queries the response was YES. Maximal size of possible extension queue 570. Compared 99543 event pairs, 5527 based on Foata normal form. 9/17826 useless extension candidates. Maximal degree in co-relation 94560. Up to 16912 conditions per place. [2024-06-03 19:25:06,096 INFO L140 encePairwiseOnDemand]: 38/53 looper letters, 179 selfloop transitions, 51 changer transitions 0/236 dead transitions. [2024-06-03 19:25:06,096 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 236 transitions, 2328 flow [2024-06-03 19:25:06,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 19:25:06,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 19:25:06,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 254 transitions. [2024-06-03 19:25:06,098 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47924528301886793 [2024-06-03 19:25:06,098 INFO L175 Difference]: Start difference. First operand has 111 places, 147 transitions, 1251 flow. Second operand 10 states and 254 transitions. [2024-06-03 19:25:06,098 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 236 transitions, 2328 flow [2024-06-03 19:25:06,314 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 236 transitions, 2284 flow, removed 6 selfloop flow, removed 4 redundant places. [2024-06-03 19:25:06,317 INFO L231 Difference]: Finished difference. Result has 119 places, 177 transitions, 1656 flow [2024-06-03 19:25:06,317 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1207, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=147, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=119, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1656, PETRI_PLACES=119, PETRI_TRANSITIONS=177} [2024-06-03 19:25:06,317 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 63 predicate places. [2024-06-03 19:25:06,317 INFO L495 AbstractCegarLoop]: Abstraction has has 119 places, 177 transitions, 1656 flow [2024-06-03 19:25:06,317 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) [2024-06-03 19:25:06,317 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:25:06,318 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:25:06,318 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-03 19:25:06,318 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-03 19:25:06,318 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:25:06,318 INFO L85 PathProgramCache]: Analyzing trace with hash -871996439, now seen corresponding path program 2 times [2024-06-03 19:25:06,318 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:25:06,318 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1904759576] [2024-06-03 19:25:06,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:25:06,318 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:25:06,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:25:07,306 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:25:07,307 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:25:07,307 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1904759576] [2024-06-03 19:25:07,307 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1904759576] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:25:07,307 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:25:07,307 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:25:07,307 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1971238956] [2024-06-03 19:25:07,307 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:25:07,307 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:25:07,307 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:25:07,308 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:25:07,308 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:25:07,413 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 53 [2024-06-03 19:25:07,414 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 177 transitions, 1656 flow. Second operand has 9 states, 9 states have (on average 13.444444444444445) internal successors, (121), 9 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:25:07,414 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:25:07,414 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 53 [2024-06-03 19:25:07,414 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:25:09,728 INFO L124 PetriNetUnfolderBase]: 12856/17914 cut-off events. [2024-06-03 19:25:09,728 INFO L125 PetriNetUnfolderBase]: For 319334/319342 co-relation queries the response was YES. [2024-06-03 19:25:09,810 INFO L83 FinitePrefix]: Finished finitePrefix Result has 100808 conditions, 17914 events. 12856/17914 cut-off events. For 319334/319342 co-relation queries the response was YES. Maximal size of possible extension queue 569. Compared 98727 event pairs, 6388 based on Foata normal form. 13/17878 useless extension candidates. Maximal degree in co-relation 100757. Up to 17207 conditions per place. [2024-06-03 19:25:09,901 INFO L140 encePairwiseOnDemand]: 37/53 looper letters, 212 selfloop transitions, 65 changer transitions 0/283 dead transitions. [2024-06-03 19:25:09,901 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 283 transitions, 2940 flow [2024-06-03 19:25:09,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 19:25:09,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 19:25:09,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 247 transitions. [2024-06-03 19:25:09,902 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4660377358490566 [2024-06-03 19:25:09,903 INFO L175 Difference]: Start difference. First operand has 119 places, 177 transitions, 1656 flow. Second operand 10 states and 247 transitions. [2024-06-03 19:25:09,903 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 283 transitions, 2940 flow [2024-06-03 19:25:10,453 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 283 transitions, 2750 flow, removed 86 selfloop flow, removed 3 redundant places. [2024-06-03 19:25:10,456 INFO L231 Difference]: Finished difference. Result has 130 places, 225 transitions, 2261 flow [2024-06-03 19:25:10,456 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1556, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=177, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=123, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2261, PETRI_PLACES=130, PETRI_TRANSITIONS=225} [2024-06-03 19:25:10,457 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 74 predicate places. [2024-06-03 19:25:10,457 INFO L495 AbstractCegarLoop]: Abstraction has has 130 places, 225 transitions, 2261 flow [2024-06-03 19:25:10,457 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.444444444444445) internal successors, (121), 9 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:25:10,457 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:25:10,457 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:25:10,458 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-03 19:25:10,458 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-03 19:25:10,458 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:25:10,458 INFO L85 PathProgramCache]: Analyzing trace with hash -1023852702, now seen corresponding path program 1 times [2024-06-03 19:25:10,458 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:25:10,459 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [783266762] [2024-06-03 19:25:10,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:25:10,459 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:25:10,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:25:11,219 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:25:11,220 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:25:11,220 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [783266762] [2024-06-03 19:25:11,220 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [783266762] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:25:11,220 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:25:11,220 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:25:11,220 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [184592336] [2024-06-03 19:25:11,220 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:25:11,221 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:25:11,221 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:25:11,221 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:25:11,221 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:25:11,326 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 53 [2024-06-03 19:25:11,327 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 130 places, 225 transitions, 2261 flow. Second operand has 9 states, 9 states have (on average 13.444444444444445) internal successors, (121), 9 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:25:11,327 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:25:11,327 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 53 [2024-06-03 19:25:11,327 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:25:14,209 INFO L124 PetriNetUnfolderBase]: 13433/18648 cut-off events. [2024-06-03 19:25:14,209 INFO L125 PetriNetUnfolderBase]: For 358886/358890 co-relation queries the response was YES. [2024-06-03 19:25:14,262 INFO L83 FinitePrefix]: Finished finitePrefix Result has 107705 conditions, 18648 events. 13433/18648 cut-off events. For 358886/358890 co-relation queries the response was YES. Maximal size of possible extension queue 570. Compared 103030 event pairs, 6377 based on Foata normal form. 18/18596 useless extension candidates. Maximal degree in co-relation 107648. Up to 17518 conditions per place. [2024-06-03 19:25:14,348 INFO L140 encePairwiseOnDemand]: 34/53 looper letters, 260 selfloop transitions, 82 changer transitions 0/348 dead transitions. [2024-06-03 19:25:14,348 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 140 places, 348 transitions, 4253 flow [2024-06-03 19:25:14,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-03 19:25:14,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-03 19:25:14,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 298 transitions. [2024-06-03 19:25:14,350 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5111492281303602 [2024-06-03 19:25:14,350 INFO L175 Difference]: Start difference. First operand has 130 places, 225 transitions, 2261 flow. Second operand 11 states and 298 transitions. [2024-06-03 19:25:14,350 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 140 places, 348 transitions, 4253 flow [2024-06-03 19:25:14,736 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 137 places, 348 transitions, 4082 flow, removed 57 selfloop flow, removed 3 redundant places. [2024-06-03 19:25:14,739 INFO L231 Difference]: Finished difference. Result has 142 places, 267 transitions, 2844 flow [2024-06-03 19:25:14,740 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=2090, PETRI_DIFFERENCE_MINUEND_PLACES=127, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=225, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=167, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2844, PETRI_PLACES=142, PETRI_TRANSITIONS=267} [2024-06-03 19:25:14,740 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 86 predicate places. [2024-06-03 19:25:14,740 INFO L495 AbstractCegarLoop]: Abstraction has has 142 places, 267 transitions, 2844 flow [2024-06-03 19:25:14,740 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.444444444444445) internal successors, (121), 9 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:25:14,740 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:25:14,741 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:25:14,741 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-03 19:25:14,741 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-03 19:25:14,741 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:25:14,741 INFO L85 PathProgramCache]: Analyzing trace with hash -1595913864, now seen corresponding path program 2 times [2024-06-03 19:25:14,741 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:25:14,742 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1912356155] [2024-06-03 19:25:14,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:25:14,742 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:25:14,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:25:15,593 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:25:15,593 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:25:15,594 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1912356155] [2024-06-03 19:25:15,594 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1912356155] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:25:15,594 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:25:15,594 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:25:15,594 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1077780514] [2024-06-03 19:25:15,594 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:25:15,594 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:25:15,594 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:25:15,595 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:25:15,595 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:25:15,758 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 53 [2024-06-03 19:25:15,758 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 142 places, 267 transitions, 2844 flow. Second operand has 9 states, 9 states have (on average 13.444444444444445) internal successors, (121), 9 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:25:15,758 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:25:15,758 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 53 [2024-06-03 19:25:15,758 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:25:18,643 INFO L124 PetriNetUnfolderBase]: 14353/19928 cut-off events. [2024-06-03 19:25:18,643 INFO L125 PetriNetUnfolderBase]: For 447390/447400 co-relation queries the response was YES. [2024-06-03 19:25:18,784 INFO L83 FinitePrefix]: Finished finitePrefix Result has 127659 conditions, 19928 events. 14353/19928 cut-off events. For 447390/447400 co-relation queries the response was YES. Maximal size of possible extension queue 586. Compared 110969 event pairs, 6389 based on Foata normal form. 30/19900 useless extension candidates. Maximal degree in co-relation 127597. Up to 18571 conditions per place. [2024-06-03 19:25:18,889 INFO L140 encePairwiseOnDemand]: 35/53 looper letters, 277 selfloop transitions, 105 changer transitions 0/388 dead transitions. [2024-06-03 19:25:18,889 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 150 places, 388 transitions, 5102 flow [2024-06-03 19:25:18,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:25:18,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:25:18,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 244 transitions. [2024-06-03 19:25:18,890 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5115303983228512 [2024-06-03 19:25:18,890 INFO L175 Difference]: Start difference. First operand has 142 places, 267 transitions, 2844 flow. Second operand 9 states and 244 transitions. [2024-06-03 19:25:18,890 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 150 places, 388 transitions, 5102 flow [2024-06-03 19:25:19,413 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 148 places, 388 transitions, 4767 flow, removed 162 selfloop flow, removed 2 redundant places. [2024-06-03 19:25:19,417 INFO L231 Difference]: Finished difference. Result has 153 places, 321 transitions, 3781 flow [2024-06-03 19:25:19,417 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=2683, PETRI_DIFFERENCE_MINUEND_PLACES=140, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=267, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=184, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3781, PETRI_PLACES=153, PETRI_TRANSITIONS=321} [2024-06-03 19:25:19,417 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 97 predicate places. [2024-06-03 19:25:19,417 INFO L495 AbstractCegarLoop]: Abstraction has has 153 places, 321 transitions, 3781 flow [2024-06-03 19:25:19,418 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.444444444444445) internal successors, (121), 9 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:25:19,418 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:25:19,418 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:25:19,418 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-03 19:25:19,418 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-03 19:25:19,418 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:25:19,418 INFO L85 PathProgramCache]: Analyzing trace with hash 1870835592, now seen corresponding path program 3 times [2024-06-03 19:25:19,419 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:25:19,419 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1767491691] [2024-06-03 19:25:19,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:25:19,419 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:25:19,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:25:20,412 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:25:20,412 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:25:20,412 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1767491691] [2024-06-03 19:25:20,412 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1767491691] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:25:20,412 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:25:20,412 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:25:20,412 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1408986090] [2024-06-03 19:25:20,412 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:25:20,413 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:25:20,413 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:25:20,413 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:25:20,413 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:25:20,530 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 53 [2024-06-03 19:25:20,530 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 153 places, 321 transitions, 3781 flow. Second operand has 9 states, 9 states have (on average 13.444444444444445) internal successors, (121), 9 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:25:20,530 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:25:20,530 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 53 [2024-06-03 19:25:20,530 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:25:24,612 INFO L124 PetriNetUnfolderBase]: 15935/22016 cut-off events. [2024-06-03 19:25:24,612 INFO L125 PetriNetUnfolderBase]: For 543128/543188 co-relation queries the response was YES. [2024-06-03 19:25:24,919 INFO L83 FinitePrefix]: Finished finitePrefix Result has 148287 conditions, 22016 events. 15935/22016 cut-off events. For 543128/543188 co-relation queries the response was YES. Maximal size of possible extension queue 671. Compared 122820 event pairs, 6241 based on Foata normal form. 26/21970 useless extension candidates. Maximal degree in co-relation 148219. Up to 18523 conditions per place. [2024-06-03 19:25:25,021 INFO L140 encePairwiseOnDemand]: 34/53 looper letters, 286 selfloop transitions, 206 changer transitions 0/498 dead transitions. [2024-06-03 19:25:25,021 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 161 places, 498 transitions, 6759 flow [2024-06-03 19:25:25,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:25:25,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:25:25,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 257 transitions. [2024-06-03 19:25:25,025 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5387840670859538 [2024-06-03 19:25:25,025 INFO L175 Difference]: Start difference. First operand has 153 places, 321 transitions, 3781 flow. Second operand 9 states and 257 transitions. [2024-06-03 19:25:25,025 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 161 places, 498 transitions, 6759 flow [2024-06-03 19:25:25,678 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 159 places, 498 transitions, 6580 flow, removed 84 selfloop flow, removed 2 redundant places. [2024-06-03 19:25:25,683 INFO L231 Difference]: Finished difference. Result has 164 places, 392 transitions, 5140 flow [2024-06-03 19:25:25,683 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=3602, PETRI_DIFFERENCE_MINUEND_PLACES=151, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=321, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=148, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=150, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5140, PETRI_PLACES=164, PETRI_TRANSITIONS=392} [2024-06-03 19:25:25,683 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 108 predicate places. [2024-06-03 19:25:25,683 INFO L495 AbstractCegarLoop]: Abstraction has has 164 places, 392 transitions, 5140 flow [2024-06-03 19:25:25,684 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.444444444444445) internal successors, (121), 9 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:25:25,684 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:25:25,684 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:25:25,684 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-03 19:25:25,684 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-03 19:25:25,684 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:25:25,684 INFO L85 PathProgramCache]: Analyzing trace with hash -871848414, now seen corresponding path program 4 times [2024-06-03 19:25:25,684 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:25:25,684 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [816482617] [2024-06-03 19:25:25,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:25:25,685 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:25:25,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:25:26,503 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:25:26,504 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:25:26,504 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [816482617] [2024-06-03 19:25:26,504 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [816482617] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:25:26,504 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:25:26,504 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:25:26,504 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1533018249] [2024-06-03 19:25:26,504 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:25:26,505 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:25:26,505 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:25:26,505 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:25:26,505 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:25:26,594 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 53 [2024-06-03 19:25:26,594 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 164 places, 392 transitions, 5140 flow. Second operand has 9 states, 9 states have (on average 13.444444444444445) internal successors, (121), 9 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:25:26,594 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:25:26,594 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 53 [2024-06-03 19:25:26,594 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:25:30,603 INFO L124 PetriNetUnfolderBase]: 15909/21988 cut-off events. [2024-06-03 19:25:30,604 INFO L125 PetriNetUnfolderBase]: For 625334/625434 co-relation queries the response was YES. [2024-06-03 19:25:30,709 INFO L83 FinitePrefix]: Finished finitePrefix Result has 160839 conditions, 21988 events. 15909/21988 cut-off events. For 625334/625434 co-relation queries the response was YES. Maximal size of possible extension queue 670. Compared 123066 event pairs, 6383 based on Foata normal form. 46/21962 useless extension candidates. Maximal degree in co-relation 160765. Up to 18512 conditions per place. [2024-06-03 19:25:30,951 INFO L140 encePairwiseOnDemand]: 34/53 looper letters, 294 selfloop transitions, 194 changer transitions 0/494 dead transitions. [2024-06-03 19:25:30,951 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 172 places, 494 transitions, 7329 flow [2024-06-03 19:25:30,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:25:30,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:25:30,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 256 transitions. [2024-06-03 19:25:30,952 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5366876310272537 [2024-06-03 19:25:30,952 INFO L175 Difference]: Start difference. First operand has 164 places, 392 transitions, 5140 flow. Second operand 9 states and 256 transitions. [2024-06-03 19:25:30,952 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 172 places, 494 transitions, 7329 flow [2024-06-03 19:25:31,846 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 170 places, 494 transitions, 7124 flow, removed 93 selfloop flow, removed 2 redundant places. [2024-06-03 19:25:31,852 INFO L231 Difference]: Finished difference. Result has 172 places, 394 transitions, 5429 flow [2024-06-03 19:25:31,852 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=4943, PETRI_DIFFERENCE_MINUEND_PLACES=162, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=392, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=192, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=198, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5429, PETRI_PLACES=172, PETRI_TRANSITIONS=394} [2024-06-03 19:25:31,853 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 116 predicate places. [2024-06-03 19:25:31,853 INFO L495 AbstractCegarLoop]: Abstraction has has 172 places, 394 transitions, 5429 flow [2024-06-03 19:25:31,853 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.444444444444445) internal successors, (121), 9 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:25:31,853 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:25:31,853 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:25:31,853 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-03 19:25:31,853 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-03 19:25:31,853 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:25:31,853 INFO L85 PathProgramCache]: Analyzing trace with hash -871848569, now seen corresponding path program 3 times [2024-06-03 19:25:31,854 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:25:31,854 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1025588623] [2024-06-03 19:25:31,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:25:31,854 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:25:31,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:25:32,875 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:25:32,875 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:25:32,875 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1025588623] [2024-06-03 19:25:32,875 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1025588623] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:25:32,875 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:25:32,875 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:25:32,875 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1904252806] [2024-06-03 19:25:32,876 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:25:32,876 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:25:32,876 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:25:32,876 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:25:32,876 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:25:33,001 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 53 [2024-06-03 19:25:33,001 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 172 places, 394 transitions, 5429 flow. Second operand has 9 states, 9 states have (on average 13.444444444444445) internal successors, (121), 9 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:25:33,002 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:25:33,002 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 53 [2024-06-03 19:25:33,002 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:25:37,031 INFO L124 PetriNetUnfolderBase]: 15931/22107 cut-off events. [2024-06-03 19:25:37,031 INFO L125 PetriNetUnfolderBase]: For 628026/628049 co-relation queries the response was YES. [2024-06-03 19:25:37,123 INFO L83 FinitePrefix]: Finished finitePrefix Result has 160995 conditions, 22107 events. 15931/22107 cut-off events. For 628026/628049 co-relation queries the response was YES. Maximal size of possible extension queue 669. Compared 124562 event pairs, 6683 based on Foata normal form. 21/22072 useless extension candidates. Maximal degree in co-relation 160918. Up to 21159 conditions per place. [2024-06-03 19:25:37,231 INFO L140 encePairwiseOnDemand]: 37/53 looper letters, 347 selfloop transitions, 104 changer transitions 0/457 dead transitions. [2024-06-03 19:25:37,231 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 180 places, 457 transitions, 6793 flow [2024-06-03 19:25:37,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:25:37,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:25:37,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 226 transitions. [2024-06-03 19:25:37,232 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47379454926624737 [2024-06-03 19:25:37,232 INFO L175 Difference]: Start difference. First operand has 172 places, 394 transitions, 5429 flow. Second operand 9 states and 226 transitions. [2024-06-03 19:25:37,232 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 180 places, 457 transitions, 6793 flow [2024-06-03 19:25:37,812 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 176 places, 457 transitions, 6502 flow, removed 32 selfloop flow, removed 4 redundant places. [2024-06-03 19:25:37,818 INFO L231 Difference]: Finished difference. Result has 178 places, 410 transitions, 5602 flow [2024-06-03 19:25:37,818 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=5140, PETRI_DIFFERENCE_MINUEND_PLACES=168, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=394, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=300, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5602, PETRI_PLACES=178, PETRI_TRANSITIONS=410} [2024-06-03 19:25:37,818 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 122 predicate places. [2024-06-03 19:25:37,818 INFO L495 AbstractCegarLoop]: Abstraction has has 178 places, 410 transitions, 5602 flow [2024-06-03 19:25:37,818 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.444444444444445) internal successors, (121), 9 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:25:37,818 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:25:37,818 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:25:37,819 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-03 19:25:37,819 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-03 19:25:37,819 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:25:37,819 INFO L85 PathProgramCache]: Analyzing trace with hash 1608880255, now seen corresponding path program 4 times [2024-06-03 19:25:37,819 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:25:37,819 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [909081316] [2024-06-03 19:25:37,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:25:37,820 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:25:37,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:25:39,006 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:25:39,006 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:25:39,006 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [909081316] [2024-06-03 19:25:39,006 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [909081316] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:25:39,006 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:25:39,006 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:25:39,006 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1869098227] [2024-06-03 19:25:39,006 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:25:39,007 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:25:39,007 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:25:39,007 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:25:39,007 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:25:39,148 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 53 [2024-06-03 19:25:39,148 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 178 places, 410 transitions, 5602 flow. Second operand has 9 states, 9 states have (on average 13.444444444444445) internal successors, (121), 9 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:25:39,148 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:25:39,148 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 53 [2024-06-03 19:25:39,149 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand