./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/mix029_power.opt_pso.opt_rmo.opt.i --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --validate ./goblint.2024-05-21_14-57-05.files/protection/mix029_power.opt_pso.opt_rmo.opt.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 76401ed0 Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReachWitnessValidation.xml -i ../../../trunk/examples/svcomp/pthread-wmm/mix029_power.opt_pso.opt_rmo.opt.i ./goblint.2024-05-21_14-57-05.files/protection/mix029_power.opt_pso.opt_rmo.opt.yml/witness.yml -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --traceabstraction.compute.hoare.annotation.of.negated.interpolant.automaton,.abstraction.and.cfg false --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.fs.goblint-validation-76401ed-m [2024-06-20 16:09:06,644 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-20 16:09:06,692 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-20 16:09:06,695 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-20 16:09:06,695 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-20 16:09:06,735 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-20 16:09:06,736 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-20 16:09:06,736 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-20 16:09:06,736 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-20 16:09:06,737 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-20 16:09:06,738 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-20 16:09:06,738 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-20 16:09:06,738 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-20 16:09:06,752 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-20 16:09:06,752 INFO L153 SettingsManager]: * Use SBE=true [2024-06-20 16:09:06,752 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-20 16:09:06,753 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-20 16:09:06,753 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-20 16:09:06,753 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-20 16:09:06,753 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-20 16:09:06,753 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-20 16:09:06,754 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-20 16:09:06,754 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-20 16:09:06,754 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-20 16:09:06,754 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-20 16:09:06,754 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-20 16:09:06,755 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-20 16:09:06,755 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-20 16:09:06,755 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-20 16:09:06,755 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-20 16:09:06,755 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-20 16:09:06,756 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-20 16:09:06,756 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-20 16:09:06,756 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-20 16:09:06,756 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-20 16:09:06,756 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-20 16:09:06,756 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-20 16:09:06,757 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-20 16:09:06,757 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-20 16:09:06,757 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-20 16:09:06,757 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-20 16:09:06,758 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-20 16:09:06,758 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-20 16:09:06,758 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-20 16:09:06,965 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-20 16:09:06,996 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-20 16:09:06,998 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-20 16:09:06,999 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-20 16:09:06,999 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-20 16:09:07,000 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-05-21_14-57-05.files/protection/mix029_power.opt_pso.opt_rmo.opt.yml/witness.yml [2024-06-20 16:09:07,202 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-20 16:09:07,202 INFO L274 PluginConnector]: CDTParser initialized [2024-06-20 16:09:07,203 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/mix029_power.opt_pso.opt_rmo.opt.i [2024-06-20 16:09:08,254 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-20 16:09:08,483 INFO L384 CDTParser]: Found 1 translation units. [2024-06-20 16:09:08,484 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/mix029_power.opt_pso.opt_rmo.opt.i [2024-06-20 16:09:08,501 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8b171eabf/d511d974957a44a4bb6cfaee1d382454/FLAGca5da778b [2024-06-20 16:09:08,515 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8b171eabf/d511d974957a44a4bb6cfaee1d382454 [2024-06-20 16:09:08,515 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-20 16:09:08,516 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-20 16:09:08,517 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-20 16:09:08,517 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-20 16:09:08,523 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-20 16:09:08,524 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 20.06 04:09:07" (1/2) ... [2024-06-20 16:09:08,525 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5be6dca9 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 04:09:08, skipping insertion in model container [2024-06-20 16:09:08,525 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 20.06 04:09:07" (1/2) ... [2024-06-20 16:09:08,526 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@2611e435 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 04:09:08, skipping insertion in model container [2024-06-20 16:09:08,527 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.06 04:09:08" (2/2) ... [2024-06-20 16:09:08,527 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5be6dca9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 04:09:08, skipping insertion in model container [2024-06-20 16:09:08,527 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.06 04:09:08" (2/2) ... [2024-06-20 16:09:08,528 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-20 16:09:08,684 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-20 16:09:08,685 INFO L97 edCorrectnessWitness]: Location invariant before [L851-L851] (((((((((((((((((((((! multithreaded || y$read_delayed == (_Bool)0) && (! multithreaded || ((((0 <= y$w_buff1 && y$w_buff1 <= 2) && y$w_buff1 <= 127) && y$w_buff1 % 2 == 0) && (y$w_buff1 == 0 || y$w_buff1 == 2)))) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1)))) && (! multithreaded || y$read_delayed_var == 0)) && (! multithreaded || (((0 <= z && z <= 2) && z <= 127) && ((z == 0 || z == 1) || z == 2)))) && (! multithreaded || ((0 <= a && a <= 1) && (a == 0 || a == 1)))) && (! multithreaded || y$r_buff1_thd4 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd4 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || y$flush_delayed == (_Bool)0)) && (! multithreaded || y$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || (((0 <= __unbuffered_p3_EAX && __unbuffered_p3_EAX <= 2) && __unbuffered_p3_EAX <= 127) && ((__unbuffered_p3_EAX == 0 || __unbuffered_p3_EAX == 1) || __unbuffered_p3_EAX == 2)))) && (! multithreaded || y$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || (((0 <= y && y <= 2) && y <= 127) && ((y == 0 || y == 1) || y == 2)))) && (! multithreaded || ((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 1) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || ((((0 <= y$w_buff0 && y$w_buff0 <= 2) && y$w_buff0 <= 127) && y$w_buff0 % 2 == 0) && (y$w_buff0 == 0 || y$w_buff0 == 2)))) && (! multithreaded || ((0 <= __unbuffered_p3_EBX && __unbuffered_p3_EBX <= 1) && (__unbuffered_p3_EBX == 0 || __unbuffered_p3_EBX == 1)))) && (! multithreaded || (((0 <= y$mem_tmp && y$mem_tmp <= 2) && y$mem_tmp <= 127) && ((y$mem_tmp == 0 || y$mem_tmp == 1) || y$mem_tmp == 2))) [2024-06-20 16:09:08,685 INFO L97 edCorrectnessWitness]: Location invariant before [L853-L853] (((((((((((((((((((((! multithreaded || y$read_delayed == (_Bool)0) && (! multithreaded || ((((0 <= y$w_buff1 && y$w_buff1 <= 2) && y$w_buff1 <= 127) && y$w_buff1 % 2 == 0) && (y$w_buff1 == 0 || y$w_buff1 == 2)))) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1)))) && (! multithreaded || y$read_delayed_var == 0)) && (! multithreaded || (((0 <= z && z <= 2) && z <= 127) && ((z == 0 || z == 1) || z == 2)))) && (! multithreaded || ((0 <= a && a <= 1) && (a == 0 || a == 1)))) && (! multithreaded || y$r_buff1_thd4 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd4 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || y$flush_delayed == (_Bool)0)) && (! multithreaded || y$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || (((0 <= __unbuffered_p3_EAX && __unbuffered_p3_EAX <= 2) && __unbuffered_p3_EAX <= 127) && ((__unbuffered_p3_EAX == 0 || __unbuffered_p3_EAX == 1) || __unbuffered_p3_EAX == 2)))) && (! multithreaded || y$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || (((0 <= y && y <= 2) && y <= 127) && ((y == 0 || y == 1) || y == 2)))) && (! multithreaded || ((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 1) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || ((((0 <= y$w_buff0 && y$w_buff0 <= 2) && y$w_buff0 <= 127) && y$w_buff0 % 2 == 0) && (y$w_buff0 == 0 || y$w_buff0 == 2)))) && (! multithreaded || ((0 <= __unbuffered_p3_EBX && __unbuffered_p3_EBX <= 1) && (__unbuffered_p3_EBX == 0 || __unbuffered_p3_EBX == 1)))) && (! multithreaded || (((0 <= y$mem_tmp && y$mem_tmp <= 2) && y$mem_tmp <= 127) && ((y$mem_tmp == 0 || y$mem_tmp == 1) || y$mem_tmp == 2))) [2024-06-20 16:09:08,685 INFO L97 edCorrectnessWitness]: Location invariant before [L849-L849] (((((((((((((((((((((! multithreaded || y$read_delayed == (_Bool)0) && (! multithreaded || ((((0 <= y$w_buff1 && y$w_buff1 <= 2) && y$w_buff1 <= 127) && y$w_buff1 % 2 == 0) && (y$w_buff1 == 0 || y$w_buff1 == 2)))) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1)))) && (! multithreaded || y$read_delayed_var == 0)) && (! multithreaded || (((0 <= z && z <= 2) && z <= 127) && ((z == 0 || z == 1) || z == 2)))) && (! multithreaded || ((0 <= a && a <= 1) && (a == 0 || a == 1)))) && (! multithreaded || y$r_buff1_thd4 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd4 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || y$flush_delayed == (_Bool)0)) && (! multithreaded || y$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || (((0 <= __unbuffered_p3_EAX && __unbuffered_p3_EAX <= 2) && __unbuffered_p3_EAX <= 127) && ((__unbuffered_p3_EAX == 0 || __unbuffered_p3_EAX == 1) || __unbuffered_p3_EAX == 2)))) && (! multithreaded || y$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || (((0 <= y && y <= 2) && y <= 127) && ((y == 0 || y == 1) || y == 2)))) && (! multithreaded || ((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 1) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || ((((0 <= y$w_buff0 && y$w_buff0 <= 2) && y$w_buff0 <= 127) && y$w_buff0 % 2 == 0) && (y$w_buff0 == 0 || y$w_buff0 == 2)))) && (! multithreaded || ((0 <= __unbuffered_p3_EBX && __unbuffered_p3_EBX <= 1) && (__unbuffered_p3_EBX == 0 || __unbuffered_p3_EBX == 1)))) && (! multithreaded || (((0 <= y$mem_tmp && y$mem_tmp <= 2) && y$mem_tmp <= 127) && ((y$mem_tmp == 0 || y$mem_tmp == 1) || y$mem_tmp == 2))) [2024-06-20 16:09:08,686 INFO L97 edCorrectnessWitness]: Location invariant before [L854-L854] (((((((((((((((((((((! multithreaded || y$read_delayed == (_Bool)0) && (! multithreaded || ((((0 <= y$w_buff1 && y$w_buff1 <= 2) && y$w_buff1 <= 127) && y$w_buff1 % 2 == 0) && (y$w_buff1 == 0 || y$w_buff1 == 2)))) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1)))) && (! multithreaded || y$read_delayed_var == 0)) && (! multithreaded || (((0 <= z && z <= 2) && z <= 127) && ((z == 0 || z == 1) || z == 2)))) && (! multithreaded || ((0 <= a && a <= 1) && (a == 0 || a == 1)))) && (! multithreaded || y$r_buff1_thd4 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd4 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || y$flush_delayed == (_Bool)0)) && (! multithreaded || y$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || (((0 <= __unbuffered_p3_EAX && __unbuffered_p3_EAX <= 2) && __unbuffered_p3_EAX <= 127) && ((__unbuffered_p3_EAX == 0 || __unbuffered_p3_EAX == 1) || __unbuffered_p3_EAX == 2)))) && (! multithreaded || y$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || (((0 <= y && y <= 2) && y <= 127) && ((y == 0 || y == 1) || y == 2)))) && (! multithreaded || ((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 1) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || ((((0 <= y$w_buff0 && y$w_buff0 <= 2) && y$w_buff0 <= 127) && y$w_buff0 % 2 == 0) && (y$w_buff0 == 0 || y$w_buff0 == 2)))) && (! multithreaded || ((0 <= __unbuffered_p3_EBX && __unbuffered_p3_EBX <= 1) && (__unbuffered_p3_EBX == 0 || __unbuffered_p3_EBX == 1)))) && (! multithreaded || (((0 <= y$mem_tmp && y$mem_tmp <= 2) && y$mem_tmp <= 127) && ((y$mem_tmp == 0 || y$mem_tmp == 1) || y$mem_tmp == 2))) [2024-06-20 16:09:08,686 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-20 16:09:08,686 INFO L106 edCorrectnessWitness]: ghost_update [L847-L847] multithreaded = 1; [2024-06-20 16:09:08,728 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-20 16:09:09,077 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-20 16:09:09,093 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-20 16:09:09,231 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-20 16:09:09,268 INFO L206 MainTranslator]: Completed translation [2024-06-20 16:09:09,269 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 04:09:09 WrapperNode [2024-06-20 16:09:09,269 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-20 16:09:09,271 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-20 16:09:09,271 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-20 16:09:09,271 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-20 16:09:09,276 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 04:09:09" (1/1) ... [2024-06-20 16:09:09,300 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 04:09:09" (1/1) ... [2024-06-20 16:09:09,342 INFO L138 Inliner]: procedures = 176, calls = 54, calls flagged for inlining = 6, calls inlined = 7, statements flattened = 157 [2024-06-20 16:09:09,342 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-20 16:09:09,343 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-20 16:09:09,343 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-20 16:09:09,343 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-20 16:09:09,351 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 04:09:09" (1/1) ... [2024-06-20 16:09:09,351 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 04:09:09" (1/1) ... [2024-06-20 16:09:09,354 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 04:09:09" (1/1) ... [2024-06-20 16:09:09,366 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2024-06-20 16:09:09,367 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 04:09:09" (1/1) ... [2024-06-20 16:09:09,367 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 04:09:09" (1/1) ... [2024-06-20 16:09:09,375 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 04:09:09" (1/1) ... [2024-06-20 16:09:09,376 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 04:09:09" (1/1) ... [2024-06-20 16:09:09,378 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 04:09:09" (1/1) ... [2024-06-20 16:09:09,379 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 04:09:09" (1/1) ... [2024-06-20 16:09:09,383 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-20 16:09:09,383 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-20 16:09:09,383 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-20 16:09:09,383 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-20 16:09:09,384 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 04:09:09" (1/1) ... [2024-06-20 16:09:09,388 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-20 16:09:09,394 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-20 16:09:09,406 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-06-20 16:09:09,442 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-06-20 16:09:09,455 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-20 16:09:09,455 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-20 16:09:09,456 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-20 16:09:09,456 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-20 16:09:09,456 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-20 16:09:09,456 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-20 16:09:09,456 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-20 16:09:09,457 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-20 16:09:09,457 INFO L130 BoogieDeclarations]: Found specification of procedure P3 [2024-06-20 16:09:09,457 INFO L138 BoogieDeclarations]: Found implementation of procedure P3 [2024-06-20 16:09:09,457 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-20 16:09:09,457 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-20 16:09:09,457 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-20 16:09:09,458 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-20 16:09:09,459 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-20 16:09:09,594 INFO L244 CfgBuilder]: Building ICFG [2024-06-20 16:09:09,596 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-20 16:09:09,922 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-20 16:09:09,922 INFO L293 CfgBuilder]: Performing block encoding [2024-06-20 16:09:10,090 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-20 16:09:10,091 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-20 16:09:10,091 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.06 04:09:10 BoogieIcfgContainer [2024-06-20 16:09:10,091 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-20 16:09:10,094 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-20 16:09:10,094 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-20 16:09:10,096 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-20 16:09:10,096 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 20.06 04:09:07" (1/4) ... [2024-06-20 16:09:10,097 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@e643bf5 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 20.06 04:09:10, skipping insertion in model container [2024-06-20 16:09:10,098 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.06 04:09:08" (2/4) ... [2024-06-20 16:09:10,098 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@e643bf5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.06 04:09:10, skipping insertion in model container [2024-06-20 16:09:10,098 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 04:09:09" (3/4) ... [2024-06-20 16:09:10,098 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@e643bf5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.06 04:09:10, skipping insertion in model container [2024-06-20 16:09:10,098 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.06 04:09:10" (4/4) ... [2024-06-20 16:09:10,099 INFO L112 eAbstractionObserver]: Analyzing ICFG mix029_power.opt_pso.opt_rmo.opt.i [2024-06-20 16:09:10,112 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-20 16:09:10,113 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 4 error locations. [2024-06-20 16:09:10,113 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-20 16:09:10,189 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-20 16:09:10,220 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 65 places, 52 transitions, 120 flow [2024-06-20 16:09:10,249 INFO L124 PetriNetUnfolderBase]: 0/48 cut-off events. [2024-06-20 16:09:10,249 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-20 16:09:10,252 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61 conditions, 48 events. 0/48 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 89 event pairs, 0 based on Foata normal form. 0/44 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2024-06-20 16:09:10,252 INFO L82 GeneralOperation]: Start removeDead. Operand has 65 places, 52 transitions, 120 flow [2024-06-20 16:09:10,255 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 55 places, 42 transitions, 96 flow [2024-06-20 16:09:10,267 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-20 16:09:10,274 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;@1bed504a, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-20 16:09:10,274 INFO L358 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2024-06-20 16:09:10,279 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-20 16:09:10,279 INFO L124 PetriNetUnfolderBase]: 0/5 cut-off events. [2024-06-20 16:09:10,279 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-20 16:09:10,280 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:09:10,280 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-06-20 16:09:10,281 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)] === [2024-06-20 16:09:10,284 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:09:10,285 INFO L85 PathProgramCache]: Analyzing trace with hash 389440905, now seen corresponding path program 1 times [2024-06-20 16:09:10,294 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:09:10,295 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1676835180] [2024-06-20 16:09:10,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:09:10,295 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:09:10,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:09:11,395 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:09:11,395 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:09:11,396 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1676835180] [2024-06-20 16:09:11,396 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1676835180] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:09:11,397 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:09:11,397 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-20 16:09:11,398 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1029671968] [2024-06-20 16:09:11,398 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:09:11,405 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-20 16:09:11,409 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:09:11,431 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-20 16:09:11,432 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-20 16:09:11,478 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 52 [2024-06-20 16:09:11,480 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 42 transitions, 96 flow. Second operand has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:09:11,481 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:09:11,481 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 52 [2024-06-20 16:09:11,481 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:09:12,818 INFO L124 PetriNetUnfolderBase]: 7775/11127 cut-off events. [2024-06-20 16:09:12,818 INFO L125 PetriNetUnfolderBase]: For 170/170 co-relation queries the response was YES. [2024-06-20 16:09:12,836 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22099 conditions, 11127 events. 7775/11127 cut-off events. For 170/170 co-relation queries the response was YES. Maximal size of possible extension queue 452. Compared 63774 event pairs, 5733 based on Foata normal form. 1/10783 useless extension candidates. Maximal degree in co-relation 22086. Up to 10609 conditions per place. [2024-06-20 16:09:12,885 INFO L140 encePairwiseOnDemand]: 43/52 looper letters, 42 selfloop transitions, 5 changer transitions 0/56 dead transitions. [2024-06-20 16:09:12,885 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 56 transitions, 227 flow [2024-06-20 16:09:12,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-20 16:09:12,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-20 16:09:12,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 96 transitions. [2024-06-20 16:09:12,895 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6153846153846154 [2024-06-20 16:09:12,897 INFO L175 Difference]: Start difference. First operand has 55 places, 42 transitions, 96 flow. Second operand 3 states and 96 transitions. [2024-06-20 16:09:12,897 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 56 transitions, 227 flow [2024-06-20 16:09:12,900 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 56 transitions, 220 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-06-20 16:09:12,905 INFO L231 Difference]: Finished difference. Result has 54 places, 46 transitions, 131 flow [2024-06-20 16:09:12,906 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=92, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=131, PETRI_PLACES=54, PETRI_TRANSITIONS=46} [2024-06-20 16:09:12,909 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, -1 predicate places. [2024-06-20 16:09:12,909 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 46 transitions, 131 flow [2024-06-20 16:09:12,910 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:09:12,910 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:09:12,910 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:09:12,910 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-20 16:09:12,910 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)] === [2024-06-20 16:09:12,911 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:09:12,911 INFO L85 PathProgramCache]: Analyzing trace with hash 590575656, now seen corresponding path program 1 times [2024-06-20 16:09:12,911 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:09:12,911 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1865350681] [2024-06-20 16:09:12,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:09:12,912 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:09:12,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:09:13,798 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:09:13,799 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:09:13,799 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1865350681] [2024-06-20 16:09:13,799 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1865350681] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:09:13,799 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:09:13,799 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-20 16:09:13,800 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1166457093] [2024-06-20 16:09:13,800 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:09:13,802 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-20 16:09:13,802 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:09:13,803 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-20 16:09:13,803 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-20 16:09:13,848 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 52 [2024-06-20 16:09:13,849 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 46 transitions, 131 flow. Second operand has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:09:13,849 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:09:13,849 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 52 [2024-06-20 16:09:13,849 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:09:15,209 INFO L124 PetriNetUnfolderBase]: 9097/12637 cut-off events. [2024-06-20 16:09:15,210 INFO L125 PetriNetUnfolderBase]: For 2438/2438 co-relation queries the response was YES. [2024-06-20 16:09:15,233 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28720 conditions, 12637 events. 9097/12637 cut-off events. For 2438/2438 co-relation queries the response was YES. Maximal size of possible extension queue 513. Compared 69920 event pairs, 5837 based on Foata normal form. 4/12637 useless extension candidates. Maximal degree in co-relation 28708. Up to 12338 conditions per place. [2024-06-20 16:09:15,288 INFO L140 encePairwiseOnDemand]: 42/52 looper letters, 53 selfloop transitions, 9 changer transitions 0/70 dead transitions. [2024-06-20 16:09:15,289 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 70 transitions, 321 flow [2024-06-20 16:09:15,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-20 16:09:15,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-20 16:09:15,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 122 transitions. [2024-06-20 16:09:15,290 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5865384615384616 [2024-06-20 16:09:15,291 INFO L175 Difference]: Start difference. First operand has 54 places, 46 transitions, 131 flow. Second operand 4 states and 122 transitions. [2024-06-20 16:09:15,291 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 70 transitions, 321 flow [2024-06-20 16:09:15,292 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 70 transitions, 316 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-20 16:09:15,293 INFO L231 Difference]: Finished difference. Result has 57 places, 50 transitions, 179 flow [2024-06-20 16:09:15,293 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=126, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=179, PETRI_PLACES=57, PETRI_TRANSITIONS=50} [2024-06-20 16:09:15,294 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 2 predicate places. [2024-06-20 16:09:15,294 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 50 transitions, 179 flow [2024-06-20 16:09:15,295 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:09:15,295 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:09:15,295 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:09:15,295 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-20 16:09:15,295 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)] === [2024-06-20 16:09:15,296 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:09:15,296 INFO L85 PathProgramCache]: Analyzing trace with hash 1654027547, now seen corresponding path program 1 times [2024-06-20 16:09:15,296 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:09:15,296 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1017044669] [2024-06-20 16:09:15,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:09:15,297 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:09:15,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:09:16,260 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:09:16,260 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:09:16,261 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1017044669] [2024-06-20 16:09:16,261 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1017044669] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:09:16,261 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:09:16,261 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-20 16:09:16,261 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1369772090] [2024-06-20 16:09:16,261 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:09:16,262 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-20 16:09:16,262 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:09:16,262 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-20 16:09:16,262 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-20 16:09:16,349 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 52 [2024-06-20 16:09:16,350 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 50 transitions, 179 flow. Second operand has 6 states, 6 states have (on average 14.166666666666666) internal successors, (85), 6 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:09:16,350 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:09:16,350 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 52 [2024-06-20 16:09:16,350 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:09:17,897 INFO L124 PetriNetUnfolderBase]: 11555/15928 cut-off events. [2024-06-20 16:09:17,897 INFO L125 PetriNetUnfolderBase]: For 8202/8202 co-relation queries the response was YES. [2024-06-20 16:09:17,924 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39937 conditions, 15928 events. 11555/15928 cut-off events. For 8202/8202 co-relation queries the response was YES. Maximal size of possible extension queue 565. Compared 86326 event pairs, 5920 based on Foata normal form. 8/15932 useless extension candidates. Maximal degree in co-relation 39923. Up to 15541 conditions per place. [2024-06-20 16:09:17,979 INFO L140 encePairwiseOnDemand]: 41/52 looper letters, 71 selfloop transitions, 16 changer transitions 0/94 dead transitions. [2024-06-20 16:09:17,979 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 94 transitions, 486 flow [2024-06-20 16:09:17,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 16:09:17,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 16:09:17,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 169 transitions. [2024-06-20 16:09:17,984 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5416666666666666 [2024-06-20 16:09:17,984 INFO L175 Difference]: Start difference. First operand has 57 places, 50 transitions, 179 flow. Second operand 6 states and 169 transitions. [2024-06-20 16:09:17,985 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 94 transitions, 486 flow [2024-06-20 16:09:17,989 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 94 transitions, 458 flow, removed 6 selfloop flow, removed 2 redundant places. [2024-06-20 16:09:17,990 INFO L231 Difference]: Finished difference. Result has 61 places, 56 transitions, 241 flow [2024-06-20 16:09:17,990 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=154, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=241, PETRI_PLACES=61, PETRI_TRANSITIONS=56} [2024-06-20 16:09:17,991 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 6 predicate places. [2024-06-20 16:09:17,992 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 56 transitions, 241 flow [2024-06-20 16:09:17,992 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.166666666666666) internal successors, (85), 6 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:09:17,992 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:09:17,992 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:09:17,992 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-20 16:09:17,992 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-20 16:09:17,993 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:09:17,993 INFO L85 PathProgramCache]: Analyzing trace with hash 1482349763, now seen corresponding path program 1 times [2024-06-20 16:09:17,993 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:09:17,994 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1583253035] [2024-06-20 16:09:17,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:09:17,994 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:09:18,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:09:18,963 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:09:18,964 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:09:18,967 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1583253035] [2024-06-20 16:09:18,967 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1583253035] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:09:18,967 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:09:18,967 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-20 16:09:18,968 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [166221702] [2024-06-20 16:09:18,968 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:09:18,968 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-20 16:09:18,969 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:09:18,969 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-20 16:09:18,970 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-20 16:09:19,034 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 52 [2024-06-20 16:09:19,035 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 56 transitions, 241 flow. Second operand has 6 states, 6 states have (on average 13.5) internal successors, (81), 6 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:09:19,036 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:09:19,036 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 52 [2024-06-20 16:09:19,036 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:09:20,642 INFO L124 PetriNetUnfolderBase]: 9854/13976 cut-off events. [2024-06-20 16:09:20,642 INFO L125 PetriNetUnfolderBase]: For 13385/13385 co-relation queries the response was YES. [2024-06-20 16:09:20,673 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38252 conditions, 13976 events. 9854/13976 cut-off events. For 13385/13385 co-relation queries the response was YES. Maximal size of possible extension queue 509. Compared 78931 event pairs, 5511 based on Foata normal form. 3/13773 useless extension candidates. Maximal degree in co-relation 38235. Up to 13366 conditions per place. [2024-06-20 16:09:20,724 INFO L140 encePairwiseOnDemand]: 41/52 looper letters, 59 selfloop transitions, 12 changer transitions 0/78 dead transitions. [2024-06-20 16:09:20,725 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 78 transitions, 458 flow [2024-06-20 16:09:20,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 16:09:20,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 16:09:20,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 135 transitions. [2024-06-20 16:09:20,726 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4326923076923077 [2024-06-20 16:09:20,726 INFO L175 Difference]: Start difference. First operand has 61 places, 56 transitions, 241 flow. Second operand 6 states and 135 transitions. [2024-06-20 16:09:20,726 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 78 transitions, 458 flow [2024-06-20 16:09:20,733 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 78 transitions, 418 flow, removed 6 selfloop flow, removed 3 redundant places. [2024-06-20 16:09:20,734 INFO L231 Difference]: Finished difference. Result has 65 places, 62 transitions, 282 flow [2024-06-20 16:09:20,734 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=203, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=282, PETRI_PLACES=65, PETRI_TRANSITIONS=62} [2024-06-20 16:09:20,735 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 10 predicate places. [2024-06-20 16:09:20,735 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 62 transitions, 282 flow [2024-06-20 16:09:20,736 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.5) internal successors, (81), 6 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:09:20,736 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:09:20,736 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:09:20,736 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-20 16:09:20,736 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)] === [2024-06-20 16:09:20,737 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:09:20,737 INFO L85 PathProgramCache]: Analyzing trace with hash -1315032729, now seen corresponding path program 1 times [2024-06-20 16:09:20,737 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:09:20,737 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2093901741] [2024-06-20 16:09:20,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:09:20,737 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:09:20,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:09:21,718 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:09:21,718 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:09:21,718 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2093901741] [2024-06-20 16:09:21,718 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2093901741] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:09:21,718 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:09:21,719 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 16:09:21,719 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [303495486] [2024-06-20 16:09:21,719 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:09:21,719 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 16:09:21,720 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:09:21,720 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 16:09:21,720 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-20 16:09:21,811 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 52 [2024-06-20 16:09:21,811 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 62 transitions, 282 flow. Second operand has 7 states, 7 states have (on average 13.428571428571429) internal successors, (94), 7 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:09:21,811 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:09:21,811 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 52 [2024-06-20 16:09:21,811 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:09:23,309 INFO L124 PetriNetUnfolderBase]: 9836/13952 cut-off events. [2024-06-20 16:09:23,310 INFO L125 PetriNetUnfolderBase]: For 20719/20719 co-relation queries the response was YES. [2024-06-20 16:09:23,348 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41488 conditions, 13952 events. 9836/13952 cut-off events. For 20719/20719 co-relation queries the response was YES. Maximal size of possible extension queue 509. Compared 78842 event pairs, 5261 based on Foata normal form. 6/13752 useless extension candidates. Maximal degree in co-relation 41468. Up to 13312 conditions per place. [2024-06-20 16:09:23,410 INFO L140 encePairwiseOnDemand]: 41/52 looper letters, 68 selfloop transitions, 15 changer transitions 0/90 dead transitions. [2024-06-20 16:09:23,410 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 90 transitions, 538 flow [2024-06-20 16:09:23,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 16:09:23,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 16:09:23,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 146 transitions. [2024-06-20 16:09:23,411 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46794871794871795 [2024-06-20 16:09:23,411 INFO L175 Difference]: Start difference. First operand has 65 places, 62 transitions, 282 flow. Second operand 6 states and 146 transitions. [2024-06-20 16:09:23,412 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 90 transitions, 538 flow [2024-06-20 16:09:23,417 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 90 transitions, 507 flow, removed 7 selfloop flow, removed 3 redundant places. [2024-06-20 16:09:23,418 INFO L231 Difference]: Finished difference. Result has 68 places, 66 transitions, 328 flow [2024-06-20 16:09:23,418 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=251, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=328, PETRI_PLACES=68, PETRI_TRANSITIONS=66} [2024-06-20 16:09:23,419 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 13 predicate places. [2024-06-20 16:09:23,419 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 66 transitions, 328 flow [2024-06-20 16:09:23,419 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.428571428571429) internal successors, (94), 7 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:09:23,419 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:09:23,419 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:09:23,419 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-20 16:09:23,420 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)] === [2024-06-20 16:09:23,420 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:09:23,420 INFO L85 PathProgramCache]: Analyzing trace with hash -840215710, now seen corresponding path program 1 times [2024-06-20 16:09:23,420 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:09:23,420 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [838132353] [2024-06-20 16:09:23,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:09:23,421 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:09:23,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:09:24,379 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:09:24,379 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:09:24,380 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [838132353] [2024-06-20 16:09:24,380 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [838132353] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:09:24,380 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:09:24,380 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 16:09:24,380 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1611043586] [2024-06-20 16:09:24,380 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:09:24,381 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 16:09:24,381 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:09:24,381 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 16:09:24,381 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-20 16:09:24,473 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 52 [2024-06-20 16:09:24,474 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 66 transitions, 328 flow. Second operand has 7 states, 7 states have (on average 12.428571428571429) internal successors, (87), 7 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:09:24,474 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:09:24,474 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 52 [2024-06-20 16:09:24,474 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:09:26,097 INFO L124 PetriNetUnfolderBase]: 11550/15932 cut-off events. [2024-06-20 16:09:26,098 INFO L125 PetriNetUnfolderBase]: For 35782/35794 co-relation queries the response was YES. [2024-06-20 16:09:26,125 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51540 conditions, 15932 events. 11550/15932 cut-off events. For 35782/35794 co-relation queries the response was YES. Maximal size of possible extension queue 565. Compared 86341 event pairs, 6273 based on Foata normal form. 11/15937 useless extension candidates. Maximal degree in co-relation 51519. Up to 15550 conditions per place. [2024-06-20 16:09:26,177 INFO L140 encePairwiseOnDemand]: 41/52 looper letters, 75 selfloop transitions, 22 changer transitions 0/103 dead transitions. [2024-06-20 16:09:26,178 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 103 transitions, 692 flow [2024-06-20 16:09:26,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 16:09:26,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 16:09:26,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 148 transitions. [2024-06-20 16:09:26,179 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47435897435897434 [2024-06-20 16:09:26,179 INFO L175 Difference]: Start difference. First operand has 68 places, 66 transitions, 328 flow. Second operand 6 states and 148 transitions. [2024-06-20 16:09:26,179 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 103 transitions, 692 flow [2024-06-20 16:09:26,183 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 103 transitions, 647 flow, removed 10 selfloop flow, removed 4 redundant places. [2024-06-20 16:09:26,185 INFO L231 Difference]: Finished difference. Result has 70 places, 74 transitions, 410 flow [2024-06-20 16:09:26,185 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=283, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=410, PETRI_PLACES=70, PETRI_TRANSITIONS=74} [2024-06-20 16:09:26,186 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 15 predicate places. [2024-06-20 16:09:26,186 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 74 transitions, 410 flow [2024-06-20 16:09:26,186 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.428571428571429) internal successors, (87), 7 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:09:26,186 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:09:26,186 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:09:26,186 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-20 16:09:26,187 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)] === [2024-06-20 16:09:26,187 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:09:26,187 INFO L85 PathProgramCache]: Analyzing trace with hash -816050590, now seen corresponding path program 2 times [2024-06-20 16:09:26,187 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:09:26,187 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [855665194] [2024-06-20 16:09:26,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:09:26,188 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:09:26,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:09:27,084 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:09:27,085 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:09:27,085 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [855665194] [2024-06-20 16:09:27,085 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [855665194] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:09:27,085 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:09:27,085 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 16:09:27,085 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2061937246] [2024-06-20 16:09:27,085 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:09:27,085 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 16:09:27,086 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:09:27,086 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 16:09:27,086 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-20 16:09:27,158 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 52 [2024-06-20 16:09:27,158 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 74 transitions, 410 flow. Second operand has 7 states, 7 states have (on average 12.428571428571429) internal successors, (87), 7 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:09:27,158 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:09:27,159 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 52 [2024-06-20 16:09:27,159 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:09:28,780 INFO L124 PetriNetUnfolderBase]: 11541/15921 cut-off events. [2024-06-20 16:09:28,780 INFO L125 PetriNetUnfolderBase]: For 49173/49182 co-relation queries the response was YES. [2024-06-20 16:09:28,817 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55276 conditions, 15921 events. 11541/15921 cut-off events. For 49173/49182 co-relation queries the response was YES. Maximal size of possible extension queue 565. Compared 86280 event pairs, 6275 based on Foata normal form. 9/15923 useless extension candidates. Maximal degree in co-relation 55254. Up to 15541 conditions per place. [2024-06-20 16:09:28,873 INFO L140 encePairwiseOnDemand]: 41/52 looper letters, 71 selfloop transitions, 21 changer transitions 0/98 dead transitions. [2024-06-20 16:09:28,874 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 98 transitions, 658 flow [2024-06-20 16:09:28,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 16:09:28,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 16:09:28,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 142 transitions. [2024-06-20 16:09:28,875 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4551282051282051 [2024-06-20 16:09:28,875 INFO L175 Difference]: Start difference. First operand has 70 places, 74 transitions, 410 flow. Second operand 6 states and 142 transitions. [2024-06-20 16:09:28,875 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 98 transitions, 658 flow [2024-06-20 16:09:28,893 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 98 transitions, 603 flow, removed 22 selfloop flow, removed 2 redundant places. [2024-06-20 16:09:28,894 INFO L231 Difference]: Finished difference. Result has 74 places, 74 transitions, 408 flow [2024-06-20 16:09:28,894 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=355, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=408, PETRI_PLACES=74, PETRI_TRANSITIONS=74} [2024-06-20 16:09:28,895 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 19 predicate places. [2024-06-20 16:09:28,895 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 74 transitions, 408 flow [2024-06-20 16:09:28,895 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.428571428571429) internal successors, (87), 7 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:09:28,895 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:09:28,896 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:09:28,896 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-20 16:09:28,896 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)] === [2024-06-20 16:09:28,896 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:09:28,896 INFO L85 PathProgramCache]: Analyzing trace with hash 1215586188, now seen corresponding path program 1 times [2024-06-20 16:09:28,896 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:09:28,896 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [332811519] [2024-06-20 16:09:28,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:09:28,897 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:09:28,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:09:29,912 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:09:29,913 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:09:29,913 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [332811519] [2024-06-20 16:09:29,913 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [332811519] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:09:29,913 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:09:29,913 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 16:09:29,913 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [96902707] [2024-06-20 16:09:29,913 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:09:29,913 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 16:09:29,913 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:09:29,914 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 16:09:29,914 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-20 16:09:30,002 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 52 [2024-06-20 16:09:30,002 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 74 transitions, 408 flow. Second operand has 8 states, 8 states have (on average 12.375) internal successors, (99), 8 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:09:30,002 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:09:30,002 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 52 [2024-06-20 16:09:30,002 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:09:31,654 INFO L124 PetriNetUnfolderBase]: 11563/15972 cut-off events. [2024-06-20 16:09:31,654 INFO L125 PetriNetUnfolderBase]: For 55493/55493 co-relation queries the response was YES. [2024-06-20 16:09:31,698 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55944 conditions, 15972 events. 11563/15972 cut-off events. For 55493/55493 co-relation queries the response was YES. Maximal size of possible extension queue 566. Compared 86729 event pairs, 6120 based on Foata normal form. 3/15971 useless extension candidates. Maximal degree in co-relation 55920. Up to 15580 conditions per place. [2024-06-20 16:09:31,756 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 89 selfloop transitions, 19 changer transitions 0/114 dead transitions. [2024-06-20 16:09:31,757 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 114 transitions, 760 flow [2024-06-20 16:09:31,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 16:09:31,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 16:09:31,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 168 transitions. [2024-06-20 16:09:31,758 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46153846153846156 [2024-06-20 16:09:31,758 INFO L175 Difference]: Start difference. First operand has 74 places, 74 transitions, 408 flow. Second operand 7 states and 168 transitions. [2024-06-20 16:09:31,758 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 114 transitions, 760 flow [2024-06-20 16:09:31,776 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 114 transitions, 700 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-06-20 16:09:31,777 INFO L231 Difference]: Finished difference. Result has 75 places, 78 transitions, 443 flow [2024-06-20 16:09:31,778 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=348, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=443, PETRI_PLACES=75, PETRI_TRANSITIONS=78} [2024-06-20 16:09:31,778 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 20 predicate places. [2024-06-20 16:09:31,778 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 78 transitions, 443 flow [2024-06-20 16:09:31,779 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.375) internal successors, (99), 8 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:09:31,779 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:09:31,779 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:09:31,779 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-20 16:09:31,779 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)] === [2024-06-20 16:09:31,779 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:09:31,779 INFO L85 PathProgramCache]: Analyzing trace with hash -276881380, now seen corresponding path program 1 times [2024-06-20 16:09:31,780 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:09:31,780 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1426610781] [2024-06-20 16:09:31,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:09:31,780 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:09:31,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:09:32,718 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:09:32,719 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:09:32,719 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1426610781] [2024-06-20 16:09:32,719 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1426610781] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:09:32,719 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:09:32,719 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 16:09:32,719 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [826602778] [2024-06-20 16:09:32,719 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:09:32,719 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 16:09:32,719 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:09:32,720 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 16:09:32,720 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-20 16:09:32,819 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 52 [2024-06-20 16:09:32,819 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 78 transitions, 443 flow. Second operand has 8 states, 8 states have (on average 12.375) internal successors, (99), 8 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:09:32,819 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:09:32,819 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 52 [2024-06-20 16:09:32,820 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:09:34,718 INFO L124 PetriNetUnfolderBase]: 11607/16020 cut-off events. [2024-06-20 16:09:34,718 INFO L125 PetriNetUnfolderBase]: For 72430/72439 co-relation queries the response was YES. [2024-06-20 16:09:34,759 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59980 conditions, 16020 events. 11607/16020 cut-off events. For 72430/72439 co-relation queries the response was YES. Maximal size of possible extension queue 562. Compared 86854 event pairs, 5724 based on Foata normal form. 9/16021 useless extension candidates. Maximal degree in co-relation 59956. Up to 15516 conditions per place. [2024-06-20 16:09:34,841 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 87 selfloop transitions, 32 changer transitions 0/125 dead transitions. [2024-06-20 16:09:34,842 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 125 transitions, 909 flow [2024-06-20 16:09:34,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 16:09:34,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 16:09:34,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 175 transitions. [2024-06-20 16:09:34,843 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4807692307692308 [2024-06-20 16:09:34,843 INFO L175 Difference]: Start difference. First operand has 75 places, 78 transitions, 443 flow. Second operand 7 states and 175 transitions. [2024-06-20 16:09:34,843 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 125 transitions, 909 flow [2024-06-20 16:09:34,863 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 125 transitions, 846 flow, removed 15 selfloop flow, removed 5 redundant places. [2024-06-20 16:09:34,864 INFO L231 Difference]: Finished difference. Result has 77 places, 86 transitions, 543 flow [2024-06-20 16:09:34,865 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=380, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=543, PETRI_PLACES=77, PETRI_TRANSITIONS=86} [2024-06-20 16:09:34,865 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 22 predicate places. [2024-06-20 16:09:34,865 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 86 transitions, 543 flow [2024-06-20 16:09:34,866 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.375) internal successors, (99), 8 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:09:34,866 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:09:34,866 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:09:34,866 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-20 16:09:34,866 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)] === [2024-06-20 16:09:34,866 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:09:34,866 INFO L85 PathProgramCache]: Analyzing trace with hash -1203384978, now seen corresponding path program 2 times [2024-06-20 16:09:34,867 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:09:34,867 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [158410561] [2024-06-20 16:09:34,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:09:34,867 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:09:34,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:09:35,924 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:09:35,924 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:09:35,924 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [158410561] [2024-06-20 16:09:35,924 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [158410561] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:09:35,924 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:09:35,924 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 16:09:35,924 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [370151431] [2024-06-20 16:09:35,924 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:09:35,925 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 16:09:35,925 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:09:35,925 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 16:09:35,925 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-20 16:09:36,063 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 52 [2024-06-20 16:09:36,063 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 86 transitions, 543 flow. Second operand has 8 states, 8 states have (on average 12.375) internal successors, (99), 8 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:09:36,064 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:09:36,064 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 52 [2024-06-20 16:09:36,064 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:09:38,052 INFO L124 PetriNetUnfolderBase]: 11629/16072 cut-off events. [2024-06-20 16:09:38,052 INFO L125 PetriNetUnfolderBase]: For 91412/91418 co-relation queries the response was YES. [2024-06-20 16:09:38,092 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64051 conditions, 16072 events. 11629/16072 cut-off events. For 91412/91418 co-relation queries the response was YES. Maximal size of possible extension queue 566. Compared 87407 event pairs, 5963 based on Foata normal form. 7/16073 useless extension candidates. Maximal degree in co-relation 64026. Up to 15592 conditions per place. [2024-06-20 16:09:38,156 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 88 selfloop transitions, 36 changer transitions 0/130 dead transitions. [2024-06-20 16:09:38,157 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 130 transitions, 1039 flow [2024-06-20 16:09:38,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 16:09:38,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 16:09:38,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 172 transitions. [2024-06-20 16:09:38,158 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4725274725274725 [2024-06-20 16:09:38,158 INFO L175 Difference]: Start difference. First operand has 77 places, 86 transitions, 543 flow. Second operand 7 states and 172 transitions. [2024-06-20 16:09:38,159 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 130 transitions, 1039 flow [2024-06-20 16:09:38,192 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 130 transitions, 988 flow, removed 16 selfloop flow, removed 3 redundant places. [2024-06-20 16:09:38,193 INFO L231 Difference]: Finished difference. Result has 81 places, 94 transitions, 683 flow [2024-06-20 16:09:38,194 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=492, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=683, PETRI_PLACES=81, PETRI_TRANSITIONS=94} [2024-06-20 16:09:38,194 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 26 predicate places. [2024-06-20 16:09:38,194 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 94 transitions, 683 flow [2024-06-20 16:09:38,195 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.375) internal successors, (99), 8 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:09:38,195 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:09:38,195 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:09:38,195 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-20 16:09:38,195 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)] === [2024-06-20 16:09:38,195 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:09:38,195 INFO L85 PathProgramCache]: Analyzing trace with hash 577699852, now seen corresponding path program 3 times [2024-06-20 16:09:38,196 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:09:38,196 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [877807373] [2024-06-20 16:09:38,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:09:38,196 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:09:38,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:09:39,315 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:09:39,315 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:09:39,315 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [877807373] [2024-06-20 16:09:39,315 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [877807373] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:09:39,315 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:09:39,316 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 16:09:39,316 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1762667682] [2024-06-20 16:09:39,316 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:09:39,316 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 16:09:39,316 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:09:39,318 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 16:09:39,318 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-20 16:09:39,407 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 52 [2024-06-20 16:09:39,407 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 94 transitions, 683 flow. Second operand has 8 states, 8 states have (on average 12.375) internal successors, (99), 8 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:09:39,407 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:09:39,407 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 52 [2024-06-20 16:09:39,407 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:09:41,501 INFO L124 PetriNetUnfolderBase]: 11620/16055 cut-off events. [2024-06-20 16:09:41,502 INFO L125 PetriNetUnfolderBase]: For 114011/114011 co-relation queries the response was YES. [2024-06-20 16:09:41,530 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67821 conditions, 16055 events. 11620/16055 cut-off events. For 114011/114011 co-relation queries the response was YES. Maximal size of possible extension queue 566. Compared 87279 event pairs, 5982 based on Foata normal form. 3/16049 useless extension candidates. Maximal degree in co-relation 67794. Up to 15583 conditions per place. [2024-06-20 16:09:41,583 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 84 selfloop transitions, 35 changer transitions 0/125 dead transitions. [2024-06-20 16:09:41,583 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 125 transitions, 1003 flow [2024-06-20 16:09:41,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 16:09:41,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 16:09:41,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 166 transitions. [2024-06-20 16:09:41,584 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45604395604395603 [2024-06-20 16:09:41,584 INFO L175 Difference]: Start difference. First operand has 81 places, 94 transitions, 683 flow. Second operand 7 states and 166 transitions. [2024-06-20 16:09:41,584 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 125 transitions, 1003 flow [2024-06-20 16:09:41,630 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 125 transitions, 914 flow, removed 34 selfloop flow, removed 3 redundant places. [2024-06-20 16:09:41,631 INFO L231 Difference]: Finished difference. Result has 85 places, 94 transitions, 675 flow [2024-06-20 16:09:41,631 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=594, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=94, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=675, PETRI_PLACES=85, PETRI_TRANSITIONS=94} [2024-06-20 16:09:41,632 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 30 predicate places. [2024-06-20 16:09:41,632 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 94 transitions, 675 flow [2024-06-20 16:09:41,632 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.375) internal successors, (99), 8 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:09:41,632 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:09:41,632 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:09:41,633 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-20 16:09:41,633 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)] === [2024-06-20 16:09:41,633 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:09:41,633 INFO L85 PathProgramCache]: Analyzing trace with hash -170114822, now seen corresponding path program 2 times [2024-06-20 16:09:41,633 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:09:41,633 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2047562779] [2024-06-20 16:09:41,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:09:41,634 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:09:41,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:09:42,587 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:09:42,587 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:09:42,587 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2047562779] [2024-06-20 16:09:42,587 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2047562779] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:09:42,587 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:09:42,587 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 16:09:42,587 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2068158331] [2024-06-20 16:09:42,587 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:09:42,587 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 16:09:42,588 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:09:42,588 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 16:09:42,588 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-20 16:09:42,688 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 52 [2024-06-20 16:09:42,688 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 94 transitions, 675 flow. Second operand has 8 states, 8 states have (on average 12.375) internal successors, (99), 8 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:09:42,688 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:09:42,688 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 52 [2024-06-20 16:09:42,688 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:09:44,475 INFO L124 PetriNetUnfolderBase]: 11664/16121 cut-off events. [2024-06-20 16:09:44,475 INFO L125 PetriNetUnfolderBase]: For 127001/127010 co-relation queries the response was YES. [2024-06-20 16:09:44,530 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69415 conditions, 16121 events. 11664/16121 cut-off events. For 127001/127010 co-relation queries the response was YES. Maximal size of possible extension queue 566. Compared 87591 event pairs, 5715 based on Foata normal form. 12/16126 useless extension candidates. Maximal degree in co-relation 69386. Up to 15572 conditions per place. [2024-06-20 16:09:44,595 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 92 selfloop transitions, 36 changer transitions 0/134 dead transitions. [2024-06-20 16:09:44,595 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 134 transitions, 1137 flow [2024-06-20 16:09:44,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 16:09:44,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 16:09:44,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 170 transitions. [2024-06-20 16:09:44,597 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46703296703296704 [2024-06-20 16:09:44,597 INFO L175 Difference]: Start difference. First operand has 85 places, 94 transitions, 675 flow. Second operand 7 states and 170 transitions. [2024-06-20 16:09:44,597 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 134 transitions, 1137 flow [2024-06-20 16:09:44,645 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 134 transitions, 1039 flow, removed 8 selfloop flow, removed 6 redundant places. [2024-06-20 16:09:44,647 INFO L231 Difference]: Finished difference. Result has 86 places, 98 transitions, 708 flow [2024-06-20 16:09:44,647 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=577, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=94, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=708, PETRI_PLACES=86, PETRI_TRANSITIONS=98} [2024-06-20 16:09:44,648 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 31 predicate places. [2024-06-20 16:09:44,648 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 98 transitions, 708 flow [2024-06-20 16:09:44,648 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.375) internal successors, (99), 8 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:09:44,648 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:09:44,648 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:09:44,648 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-20 16:09:44,649 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)] === [2024-06-20 16:09:44,649 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:09:44,649 INFO L85 PathProgramCache]: Analyzing trace with hash -1026253272, now seen corresponding path program 3 times [2024-06-20 16:09:44,649 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:09:44,649 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1887368281] [2024-06-20 16:09:44,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:09:44,649 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:09:44,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:09:45,593 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:09:45,593 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:09:45,593 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1887368281] [2024-06-20 16:09:45,593 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1887368281] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:09:45,593 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:09:45,593 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 16:09:45,594 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [511993203] [2024-06-20 16:09:45,594 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:09:45,594 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 16:09:45,594 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:09:45,594 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 16:09:45,594 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-20 16:09:45,665 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 52 [2024-06-20 16:09:45,666 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 98 transitions, 708 flow. Second operand has 8 states, 8 states have (on average 12.375) internal successors, (99), 8 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:09:45,666 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:09:45,666 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 52 [2024-06-20 16:09:45,666 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:09:47,499 INFO L124 PetriNetUnfolderBase]: 11646/16097 cut-off events. [2024-06-20 16:09:47,499 INFO L125 PetriNetUnfolderBase]: For 140582/140591 co-relation queries the response was YES. [2024-06-20 16:09:47,554 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70548 conditions, 16097 events. 11646/16097 cut-off events. For 140582/140591 co-relation queries the response was YES. Maximal size of possible extension queue 566. Compared 87440 event pairs, 5712 based on Foata normal form. 12/16102 useless extension candidates. Maximal degree in co-relation 70518. Up to 15557 conditions per place. [2024-06-20 16:09:47,622 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 91 selfloop transitions, 35 changer transitions 0/132 dead transitions. [2024-06-20 16:09:47,622 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 132 transitions, 1048 flow [2024-06-20 16:09:47,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 16:09:47,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 16:09:47,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 169 transitions. [2024-06-20 16:09:47,624 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4642857142857143 [2024-06-20 16:09:47,624 INFO L175 Difference]: Start difference. First operand has 86 places, 98 transitions, 708 flow. Second operand 7 states and 169 transitions. [2024-06-20 16:09:47,624 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 132 transitions, 1048 flow [2024-06-20 16:09:47,687 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 132 transitions, 932 flow, removed 32 selfloop flow, removed 4 redundant places. [2024-06-20 16:09:47,688 INFO L231 Difference]: Finished difference. Result has 89 places, 98 transitions, 673 flow [2024-06-20 16:09:47,689 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=592, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=98, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=673, PETRI_PLACES=89, PETRI_TRANSITIONS=98} [2024-06-20 16:09:47,689 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 34 predicate places. [2024-06-20 16:09:47,689 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 98 transitions, 673 flow [2024-06-20 16:09:47,690 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.375) internal successors, (99), 8 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:09:47,690 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:09:47,690 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:09:47,690 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-20 16:09:47,690 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)] === [2024-06-20 16:09:47,690 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:09:47,690 INFO L85 PathProgramCache]: Analyzing trace with hash -1026007194, now seen corresponding path program 1 times [2024-06-20 16:09:47,691 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:09:47,691 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [531719952] [2024-06-20 16:09:47,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:09:47,691 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:09:47,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:09:49,046 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:09:49,046 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:09:49,046 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [531719952] [2024-06-20 16:09:49,046 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [531719952] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:09:49,046 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:09:49,046 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:09:49,047 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [937530587] [2024-06-20 16:09:49,047 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:09:49,047 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:09:49,047 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:09:49,047 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:09:49,047 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:09:49,162 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 52 [2024-06-20 16:09:49,162 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 98 transitions, 673 flow. Second operand has 9 states, 9 states have (on average 13.333333333333334) internal successors, (120), 9 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:09:49,162 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:09:49,162 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 52 [2024-06-20 16:09:49,162 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:09:50,738 INFO L124 PetriNetUnfolderBase]: 9939/13885 cut-off events. [2024-06-20 16:09:50,738 INFO L125 PetriNetUnfolderBase]: For 133067/133067 co-relation queries the response was YES. [2024-06-20 16:09:50,793 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62190 conditions, 13885 events. 9939/13885 cut-off events. For 133067/133067 co-relation queries the response was YES. Maximal size of possible extension queue 504. Compared 76629 event pairs, 4734 based on Foata normal form. 6/13741 useless extension candidates. Maximal degree in co-relation 62159. Up to 13423 conditions per place. [2024-06-20 16:09:50,848 INFO L140 encePairwiseOnDemand]: 41/52 looper letters, 108 selfloop transitions, 18 changer transitions 0/133 dead transitions. [2024-06-20 16:09:50,849 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 133 transitions, 1055 flow [2024-06-20 16:09:50,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 16:09:50,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 16:09:50,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 169 transitions. [2024-06-20 16:09:50,850 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4642857142857143 [2024-06-20 16:09:50,850 INFO L175 Difference]: Start difference. First operand has 89 places, 98 transitions, 673 flow. Second operand 7 states and 169 transitions. [2024-06-20 16:09:50,850 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 133 transitions, 1055 flow [2024-06-20 16:09:50,908 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 133 transitions, 956 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-06-20 16:09:50,910 INFO L231 Difference]: Finished difference. Result has 89 places, 101 transitions, 674 flow [2024-06-20 16:09:50,910 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=574, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=98, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=674, PETRI_PLACES=89, PETRI_TRANSITIONS=101} [2024-06-20 16:09:50,910 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 34 predicate places. [2024-06-20 16:09:50,910 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 101 transitions, 674 flow [2024-06-20 16:09:50,911 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.333333333333334) internal successors, (120), 9 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:09:50,911 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:09:50,911 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:09:50,911 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-20 16:09:50,911 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-20 16:09:50,911 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:09:50,911 INFO L85 PathProgramCache]: Analyzing trace with hash 2000730435, now seen corresponding path program 1 times [2024-06-20 16:09:50,912 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:09:50,912 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [141553752] [2024-06-20 16:09:50,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:09:50,912 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:09:50,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:09:51,754 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:09:51,756 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:09:51,756 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [141553752] [2024-06-20 16:09:51,756 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [141553752] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:09:51,756 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:09:51,756 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-20 16:09:51,756 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [698728902] [2024-06-20 16:09:51,756 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:09:51,757 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-20 16:09:51,757 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:09:51,757 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-20 16:09:51,757 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-20 16:09:51,814 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 52 [2024-06-20 16:09:51,814 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 101 transitions, 674 flow. Second operand has 6 states, 6 states have (on average 15.0) internal successors, (90), 6 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:09:51,814 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:09:51,814 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 52 [2024-06-20 16:09:51,815 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:09:53,231 INFO L124 PetriNetUnfolderBase]: 9340/13660 cut-off events. [2024-06-20 16:09:53,231 INFO L125 PetriNetUnfolderBase]: For 145750/145750 co-relation queries the response was YES. [2024-06-20 16:09:53,270 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62521 conditions, 13660 events. 9340/13660 cut-off events. For 145750/145750 co-relation queries the response was YES. Maximal size of possible extension queue 510. Compared 80752 event pairs, 4941 based on Foata normal form. 2/13478 useless extension candidates. Maximal degree in co-relation 62489. Up to 12717 conditions per place. [2024-06-20 16:09:53,321 INFO L140 encePairwiseOnDemand]: 43/52 looper letters, 93 selfloop transitions, 11 changer transitions 0/118 dead transitions. [2024-06-20 16:09:53,321 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 118 transitions, 958 flow [2024-06-20 16:09:53,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-20 16:09:53,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-20 16:09:53,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 122 transitions. [2024-06-20 16:09:53,322 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46923076923076923 [2024-06-20 16:09:53,322 INFO L175 Difference]: Start difference. First operand has 89 places, 101 transitions, 674 flow. Second operand 5 states and 122 transitions. [2024-06-20 16:09:53,322 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 118 transitions, 958 flow [2024-06-20 16:09:53,379 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 118 transitions, 884 flow, removed 21 selfloop flow, removed 5 redundant places. [2024-06-20 16:09:53,381 INFO L231 Difference]: Finished difference. Result has 89 places, 105 transitions, 681 flow [2024-06-20 16:09:53,381 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=600, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=101, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=681, PETRI_PLACES=89, PETRI_TRANSITIONS=105} [2024-06-20 16:09:53,382 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 34 predicate places. [2024-06-20 16:09:53,382 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 105 transitions, 681 flow [2024-06-20 16:09:53,382 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.0) internal successors, (90), 6 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:09:53,382 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:09:53,382 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:09:53,382 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-20 16:09:53,382 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-20 16:09:53,383 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:09:53,383 INFO L85 PathProgramCache]: Analyzing trace with hash -1187772272, now seen corresponding path program 1 times [2024-06-20 16:09:53,383 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:09:53,383 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [961818079] [2024-06-20 16:09:53,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:09:53,383 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:09:53,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:09:54,443 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:09:54,443 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:09:54,443 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [961818079] [2024-06-20 16:09:54,443 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [961818079] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:09:54,443 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:09:54,443 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:09:54,443 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [465717887] [2024-06-20 16:09:54,443 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:09:54,444 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:09:54,444 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:09:54,444 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:09:54,444 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:09:54,587 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 52 [2024-06-20 16:09:54,587 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 105 transitions, 681 flow. Second operand has 9 states, 9 states have (on average 12.333333333333334) internal successors, (111), 9 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:09:54,587 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:09:54,587 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 52 [2024-06-20 16:09:54,587 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:09:56,444 INFO L124 PetriNetUnfolderBase]: 11668/16154 cut-off events. [2024-06-20 16:09:56,444 INFO L125 PetriNetUnfolderBase]: For 200937/200937 co-relation queries the response was YES. [2024-06-20 16:09:56,502 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78156 conditions, 16154 events. 11668/16154 cut-off events. For 200937/200937 co-relation queries the response was YES. Maximal size of possible extension queue 565. Compared 87805 event pairs, 5816 based on Foata normal form. 6/16154 useless extension candidates. Maximal degree in co-relation 78123. Up to 15694 conditions per place. [2024-06-20 16:09:56,722 INFO L140 encePairwiseOnDemand]: 39/52 looper letters, 124 selfloop transitions, 23 changer transitions 0/153 dead transitions. [2024-06-20 16:09:56,723 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 153 transitions, 1153 flow [2024-06-20 16:09:56,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:09:56,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:09:56,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 191 transitions. [2024-06-20 16:09:56,724 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45913461538461536 [2024-06-20 16:09:56,724 INFO L175 Difference]: Start difference. First operand has 89 places, 105 transitions, 681 flow. Second operand 8 states and 191 transitions. [2024-06-20 16:09:56,724 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 153 transitions, 1153 flow [2024-06-20 16:09:56,777 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 153 transitions, 1102 flow, removed 17 selfloop flow, removed 3 redundant places. [2024-06-20 16:09:56,779 INFO L231 Difference]: Finished difference. Result has 94 places, 109 transitions, 755 flow [2024-06-20 16:09:56,779 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=630, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=105, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=755, PETRI_PLACES=94, PETRI_TRANSITIONS=109} [2024-06-20 16:09:56,780 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 39 predicate places. [2024-06-20 16:09:56,780 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 109 transitions, 755 flow [2024-06-20 16:09:56,780 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.333333333333334) internal successors, (111), 9 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:09:56,780 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:09:56,780 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:09:56,780 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-20 16:09:56,780 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)] === [2024-06-20 16:09:56,781 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:09:56,781 INFO L85 PathProgramCache]: Analyzing trace with hash 6613480, now seen corresponding path program 2 times [2024-06-20 16:09:56,781 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:09:56,781 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1093747841] [2024-06-20 16:09:56,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:09:56,782 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:09:56,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:09:57,781 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:09:57,781 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:09:57,781 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1093747841] [2024-06-20 16:09:57,781 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1093747841] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:09:57,781 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:09:57,781 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:09:57,781 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2016124268] [2024-06-20 16:09:57,781 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:09:57,782 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:09:57,782 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:09:57,782 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:09:57,782 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:09:57,877 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 52 [2024-06-20 16:09:57,877 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 109 transitions, 755 flow. Second operand has 9 states, 9 states have (on average 12.333333333333334) internal successors, (111), 9 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:09:57,877 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:09:57,877 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 52 [2024-06-20 16:09:57,877 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:09:59,842 INFO L124 PetriNetUnfolderBase]: 11774/16344 cut-off events. [2024-06-20 16:09:59,842 INFO L125 PetriNetUnfolderBase]: For 230967/230976 co-relation queries the response was YES. [2024-06-20 16:09:59,895 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83033 conditions, 16344 events. 11774/16344 cut-off events. For 230967/230976 co-relation queries the response was YES. Maximal size of possible extension queue 567. Compared 89218 event pairs, 5378 based on Foata normal form. 10/16346 useless extension candidates. Maximal degree in co-relation 82999. Up to 15487 conditions per place. [2024-06-20 16:09:59,965 INFO L140 encePairwiseOnDemand]: 39/52 looper letters, 103 selfloop transitions, 62 changer transitions 0/171 dead transitions. [2024-06-20 16:09:59,965 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 171 transitions, 1603 flow [2024-06-20 16:09:59,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:09:59,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:09:59,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 204 transitions. [2024-06-20 16:09:59,966 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49038461538461536 [2024-06-20 16:09:59,967 INFO L175 Difference]: Start difference. First operand has 94 places, 109 transitions, 755 flow. Second operand 8 states and 204 transitions. [2024-06-20 16:09:59,967 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 171 transitions, 1603 flow [2024-06-20 16:10:00,053 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 171 transitions, 1510 flow, removed 26 selfloop flow, removed 6 redundant places. [2024-06-20 16:10:00,055 INFO L231 Difference]: Finished difference. Result has 96 places, 121 transitions, 1009 flow [2024-06-20 16:10:00,056 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=662, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=109, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1009, PETRI_PLACES=96, PETRI_TRANSITIONS=121} [2024-06-20 16:10:00,056 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 41 predicate places. [2024-06-20 16:10:00,056 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 121 transitions, 1009 flow [2024-06-20 16:10:00,056 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.333333333333334) internal successors, (111), 9 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:10:00,056 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:10:00,057 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:10:00,057 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-20 16:10:00,057 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)] === [2024-06-20 16:10:00,057 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:10:00,057 INFO L85 PathProgramCache]: Analyzing trace with hash -1185249538, now seen corresponding path program 3 times [2024-06-20 16:10:00,057 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:10:00,057 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [345377533] [2024-06-20 16:10:00,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:10:00,058 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:10:00,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:10:01,067 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:10:01,067 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:10:01,067 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [345377533] [2024-06-20 16:10:01,067 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [345377533] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:10:01,067 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:10:01,067 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:10:01,067 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [264281286] [2024-06-20 16:10:01,067 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:10:01,067 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:10:01,068 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:10:01,068 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:10:01,068 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:10:01,140 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 52 [2024-06-20 16:10:01,141 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 121 transitions, 1009 flow. Second operand has 9 states, 9 states have (on average 12.333333333333334) internal successors, (111), 9 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:10:01,141 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:10:01,141 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 52 [2024-06-20 16:10:01,141 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:10:03,239 INFO L124 PetriNetUnfolderBase]: 11756/16312 cut-off events. [2024-06-20 16:10:03,239 INFO L125 PetriNetUnfolderBase]: For 265060/265069 co-relation queries the response was YES. [2024-06-20 16:10:03,321 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86628 conditions, 16312 events. 11756/16312 cut-off events. For 265060/265069 co-relation queries the response was YES. Maximal size of possible extension queue 567. Compared 89000 event pairs, 5386 based on Foata normal form. 10/16314 useless extension candidates. Maximal degree in co-relation 86593. Up to 15472 conditions per place. [2024-06-20 16:10:03,398 INFO L140 encePairwiseOnDemand]: 39/52 looper letters, 102 selfloop transitions, 61 changer transitions 0/169 dead transitions. [2024-06-20 16:10:03,399 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 103 places, 169 transitions, 1557 flow [2024-06-20 16:10:03,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:10:03,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:10:03,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 203 transitions. [2024-06-20 16:10:03,400 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4879807692307692 [2024-06-20 16:10:03,401 INFO L175 Difference]: Start difference. First operand has 96 places, 121 transitions, 1009 flow. Second operand 8 states and 203 transitions. [2024-06-20 16:10:03,401 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 103 places, 169 transitions, 1557 flow [2024-06-20 16:10:03,556 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 169 transitions, 1424 flow, removed 53 selfloop flow, removed 3 redundant places. [2024-06-20 16:10:03,558 INFO L231 Difference]: Finished difference. Result has 101 places, 121 transitions, 1009 flow [2024-06-20 16:10:03,558 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=876, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=121, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1009, PETRI_PLACES=101, PETRI_TRANSITIONS=121} [2024-06-20 16:10:03,559 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 46 predicate places. [2024-06-20 16:10:03,559 INFO L495 AbstractCegarLoop]: Abstraction has has 101 places, 121 transitions, 1009 flow [2024-06-20 16:10:03,560 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.333333333333334) internal successors, (111), 9 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:10:03,560 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:10:03,560 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:10:03,560 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-20 16:10:03,560 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)] === [2024-06-20 16:10:03,560 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:10:03,560 INFO L85 PathProgramCache]: Analyzing trace with hash 728833662, now seen corresponding path program 4 times [2024-06-20 16:10:03,560 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:10:03,561 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1222235283] [2024-06-20 16:10:03,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:10:03,561 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:10:03,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:10:04,511 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:10:04,511 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:10:04,511 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1222235283] [2024-06-20 16:10:04,511 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1222235283] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:10:04,511 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:10:04,511 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:10:04,512 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1366820822] [2024-06-20 16:10:04,512 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:10:04,512 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:10:04,512 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:10:04,513 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:10:04,513 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:10:04,649 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 52 [2024-06-20 16:10:04,649 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 121 transitions, 1009 flow. Second operand has 9 states, 9 states have (on average 12.333333333333334) internal successors, (111), 9 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:10:04,649 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:10:04,649 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 52 [2024-06-20 16:10:04,649 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:10:06,725 INFO L124 PetriNetUnfolderBase]: 11862/16474 cut-off events. [2024-06-20 16:10:06,726 INFO L125 PetriNetUnfolderBase]: For 288619/288622 co-relation queries the response was YES. [2024-06-20 16:10:06,795 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89105 conditions, 16474 events. 11862/16474 cut-off events. For 288619/288622 co-relation queries the response was YES. Maximal size of possible extension queue 567. Compared 90049 event pairs, 5383 based on Foata normal form. 6/16470 useless extension candidates. Maximal degree in co-relation 89068. Up to 15563 conditions per place. [2024-06-20 16:10:06,870 INFO L140 encePairwiseOnDemand]: 39/52 looper letters, 103 selfloop transitions, 68 changer transitions 0/177 dead transitions. [2024-06-20 16:10:06,870 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 177 transitions, 1851 flow [2024-06-20 16:10:06,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:10:06,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:10:06,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 202 transitions. [2024-06-20 16:10:06,872 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4855769230769231 [2024-06-20 16:10:06,872 INFO L175 Difference]: Start difference. First operand has 101 places, 121 transitions, 1009 flow. Second operand 8 states and 202 transitions. [2024-06-20 16:10:06,872 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 177 transitions, 1851 flow [2024-06-20 16:10:07,016 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 177 transitions, 1689 flow, removed 7 selfloop flow, removed 7 redundant places. [2024-06-20 16:10:07,018 INFO L231 Difference]: Finished difference. Result has 102 places, 129 transitions, 1162 flow [2024-06-20 16:10:07,018 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=863, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=121, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1162, PETRI_PLACES=102, PETRI_TRANSITIONS=129} [2024-06-20 16:10:07,019 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 47 predicate places. [2024-06-20 16:10:07,019 INFO L495 AbstractCegarLoop]: Abstraction has has 102 places, 129 transitions, 1162 flow [2024-06-20 16:10:07,019 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.333333333333334) internal successors, (111), 9 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:10:07,019 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:10:07,019 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:10:07,019 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-20 16:10:07,019 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)] === [2024-06-20 16:10:07,020 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:10:07,020 INFO L85 PathProgramCache]: Analyzing trace with hash -1741727042, now seen corresponding path program 5 times [2024-06-20 16:10:07,020 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:10:07,020 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2063607944] [2024-06-20 16:10:07,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:10:07,020 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:10:07,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:10:07,953 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:10:07,953 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:10:07,954 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2063607944] [2024-06-20 16:10:07,954 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2063607944] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:10:07,954 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:10:07,954 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:10:07,954 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [85847572] [2024-06-20 16:10:07,954 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:10:07,954 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:10:07,955 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:10:07,955 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:10:07,955 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:10:08,089 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 52 [2024-06-20 16:10:08,089 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 129 transitions, 1162 flow. Second operand has 9 states, 9 states have (on average 12.333333333333334) internal successors, (111), 9 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:10:08,089 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:10:08,089 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 52 [2024-06-20 16:10:08,089 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:10:10,206 INFO L124 PetriNetUnfolderBase]: 11844/16450 cut-off events. [2024-06-20 16:10:10,207 INFO L125 PetriNetUnfolderBase]: For 309017/309020 co-relation queries the response was YES. [2024-06-20 16:10:10,274 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90026 conditions, 16450 events. 11844/16450 cut-off events. For 309017/309020 co-relation queries the response was YES. Maximal size of possible extension queue 567. Compared 89924 event pairs, 5391 based on Foata normal form. 6/16446 useless extension candidates. Maximal degree in co-relation 89988. Up to 15548 conditions per place. [2024-06-20 16:10:10,348 INFO L140 encePairwiseOnDemand]: 39/52 looper letters, 96 selfloop transitions, 71 changer transitions 0/173 dead transitions. [2024-06-20 16:10:10,349 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 173 transitions, 1720 flow [2024-06-20 16:10:10,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:10:10,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:10:10,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 196 transitions. [2024-06-20 16:10:10,350 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47115384615384615 [2024-06-20 16:10:10,350 INFO L175 Difference]: Start difference. First operand has 102 places, 129 transitions, 1162 flow. Second operand 8 states and 196 transitions. [2024-06-20 16:10:10,351 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 173 transitions, 1720 flow [2024-06-20 16:10:10,523 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 173 transitions, 1467 flow, removed 57 selfloop flow, removed 5 redundant places. [2024-06-20 16:10:10,525 INFO L231 Difference]: Finished difference. Result has 105 places, 129 transitions, 1062 flow [2024-06-20 16:10:10,525 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=909, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=129, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1062, PETRI_PLACES=105, PETRI_TRANSITIONS=129} [2024-06-20 16:10:10,526 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 50 predicate places. [2024-06-20 16:10:10,526 INFO L495 AbstractCegarLoop]: Abstraction has has 105 places, 129 transitions, 1062 flow [2024-06-20 16:10:10,526 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.333333333333334) internal successors, (111), 9 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:10:10,526 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:10:10,526 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:10:10,526 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-20 16:10:10,527 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)] === [2024-06-20 16:10:10,527 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:10:10,527 INFO L85 PathProgramCache]: Analyzing trace with hash -1749084272, now seen corresponding path program 6 times [2024-06-20 16:10:10,527 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:10:10,527 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1356188446] [2024-06-20 16:10:10,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:10:10,527 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:10:10,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:10:11,466 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:10:11,467 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:10:11,467 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1356188446] [2024-06-20 16:10:11,467 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1356188446] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:10:11,467 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:10:11,467 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:10:11,467 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [966991260] [2024-06-20 16:10:11,468 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:10:11,468 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:10:11,468 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:10:11,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:10:11,469 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:10:11,584 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 52 [2024-06-20 16:10:11,584 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 129 transitions, 1062 flow. Second operand has 9 states, 9 states have (on average 12.333333333333334) internal successors, (111), 9 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:10:11,584 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:10:11,584 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 52 [2024-06-20 16:10:11,584 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:10:13,544 INFO L124 PetriNetUnfolderBase]: 11826/16426 cut-off events. [2024-06-20 16:10:13,544 INFO L125 PetriNetUnfolderBase]: For 327806/327809 co-relation queries the response was YES. [2024-06-20 16:10:13,602 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90589 conditions, 16426 events. 11826/16426 cut-off events. For 327806/327809 co-relation queries the response was YES. Maximal size of possible extension queue 567. Compared 89611 event pairs, 5380 based on Foata normal form. 6/16422 useless extension candidates. Maximal degree in co-relation 90550. Up to 15533 conditions per place. [2024-06-20 16:10:13,688 INFO L140 encePairwiseOnDemand]: 39/52 looper letters, 96 selfloop transitions, 69 changer transitions 0/171 dead transitions. [2024-06-20 16:10:13,688 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 171 transitions, 1500 flow [2024-06-20 16:10:13,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:10:13,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:10:13,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 195 transitions. [2024-06-20 16:10:13,690 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46875 [2024-06-20 16:10:13,690 INFO L175 Difference]: Start difference. First operand has 105 places, 129 transitions, 1062 flow. Second operand 8 states and 195 transitions. [2024-06-20 16:10:13,690 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 171 transitions, 1500 flow [2024-06-20 16:10:13,861 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 171 transitions, 1287 flow, removed 30 selfloop flow, removed 7 redundant places. [2024-06-20 16:10:13,863 INFO L231 Difference]: Finished difference. Result has 106 places, 129 transitions, 998 flow [2024-06-20 16:10:13,863 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=849, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=129, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=998, PETRI_PLACES=106, PETRI_TRANSITIONS=129} [2024-06-20 16:10:13,864 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 51 predicate places. [2024-06-20 16:10:13,864 INFO L495 AbstractCegarLoop]: Abstraction has has 106 places, 129 transitions, 998 flow [2024-06-20 16:10:13,864 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.333333333333334) internal successors, (111), 9 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:10:13,864 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:10:13,864 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:10:13,865 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-20 16:10:13,865 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-20 16:10:13,865 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:10:13,865 INFO L85 PathProgramCache]: Analyzing trace with hash 1893102841, now seen corresponding path program 1 times [2024-06-20 16:10:13,865 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:10:13,865 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [983602850] [2024-06-20 16:10:13,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:10:13,866 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:10:13,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:10:14,792 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:10:14,792 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:10:14,793 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [983602850] [2024-06-20 16:10:14,793 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [983602850] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:10:14,793 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:10:14,793 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 16:10:14,793 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [655189861] [2024-06-20 16:10:14,793 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:10:14,793 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 16:10:14,793 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:10:14,793 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 16:10:14,793 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-20 16:10:14,883 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 52 [2024-06-20 16:10:14,884 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 129 transitions, 998 flow. Second operand has 7 states, 7 states have (on average 13.857142857142858) internal successors, (97), 7 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:10:14,884 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:10:14,884 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 52 [2024-06-20 16:10:14,884 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:10:16,612 INFO L124 PetriNetUnfolderBase]: 11079/15671 cut-off events. [2024-06-20 16:10:16,612 INFO L125 PetriNetUnfolderBase]: For 343058/343074 co-relation queries the response was YES. [2024-06-20 16:10:16,666 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88457 conditions, 15671 events. 11079/15671 cut-off events. For 343058/343074 co-relation queries the response was YES. Maximal size of possible extension queue 565. Compared 88690 event pairs, 5714 based on Foata normal form. 3/15640 useless extension candidates. Maximal degree in co-relation 88417. Up to 15027 conditions per place. [2024-06-20 16:10:16,731 INFO L140 encePairwiseOnDemand]: 41/52 looper letters, 126 selfloop transitions, 23 changer transitions 0/162 dead transitions. [2024-06-20 16:10:16,731 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 162 transitions, 1562 flow [2024-06-20 16:10:16,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 16:10:16,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 16:10:16,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 144 transitions. [2024-06-20 16:10:16,732 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46153846153846156 [2024-06-20 16:10:16,732 INFO L175 Difference]: Start difference. First operand has 106 places, 129 transitions, 998 flow. Second operand 6 states and 144 transitions. [2024-06-20 16:10:16,732 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 162 transitions, 1562 flow [2024-06-20 16:10:16,861 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 162 transitions, 1413 flow, removed 3 selfloop flow, removed 7 redundant places. [2024-06-20 16:10:16,863 INFO L231 Difference]: Finished difference. Result has 107 places, 143 transitions, 1074 flow [2024-06-20 16:10:16,863 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=849, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=129, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=113, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1074, PETRI_PLACES=107, PETRI_TRANSITIONS=143} [2024-06-20 16:10:16,864 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 52 predicate places. [2024-06-20 16:10:16,864 INFO L495 AbstractCegarLoop]: Abstraction has has 107 places, 143 transitions, 1074 flow [2024-06-20 16:10:16,864 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.857142857142858) internal successors, (97), 7 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:10:16,864 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:10:16,864 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:10:16,865 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-20 16:10:16,865 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)] === [2024-06-20 16:10:16,865 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:10:16,865 INFO L85 PathProgramCache]: Analyzing trace with hash -1224854965, now seen corresponding path program 1 times [2024-06-20 16:10:16,865 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:10:16,866 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2041520678] [2024-06-20 16:10:16,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:10:16,866 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:10:16,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:10:18,019 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:10:18,019 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:10:18,019 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2041520678] [2024-06-20 16:10:18,019 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2041520678] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:10:18,019 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:10:18,019 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:10:18,019 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [658510575] [2024-06-20 16:10:18,020 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:10:18,021 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:10:18,021 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:10:18,022 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:10:18,022 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:10:18,130 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 52 [2024-06-20 16:10:18,131 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 143 transitions, 1074 flow. Second operand has 9 states, 9 states have (on average 12.333333333333334) internal successors, (111), 9 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:10:18,131 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:10:18,131 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 52 [2024-06-20 16:10:18,131 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:10:20,428 INFO L124 PetriNetUnfolderBase]: 12334/17175 cut-off events. [2024-06-20 16:10:20,428 INFO L125 PetriNetUnfolderBase]: For 406926/407046 co-relation queries the response was YES. [2024-06-20 16:10:20,482 INFO L83 FinitePrefix]: Finished finitePrefix Result has 100562 conditions, 17175 events. 12334/17175 cut-off events. For 406926/407046 co-relation queries the response was YES. Maximal size of possible extension queue 600. Compared 94525 event pairs, 4759 based on Foata normal form. 6/17131 useless extension candidates. Maximal degree in co-relation 100519. Up to 16408 conditions per place. [2024-06-20 16:10:20,557 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 167 selfloop transitions, 28 changer transitions 0/204 dead transitions. [2024-06-20 16:10:20,557 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 204 transitions, 1872 flow [2024-06-20 16:10:20,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 16:10:20,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 16:10:20,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 216 transitions. [2024-06-20 16:10:20,559 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46153846153846156 [2024-06-20 16:10:20,559 INFO L175 Difference]: Start difference. First operand has 107 places, 143 transitions, 1074 flow. Second operand 9 states and 216 transitions. [2024-06-20 16:10:20,559 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 115 places, 204 transitions, 1872 flow [2024-06-20 16:10:20,747 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 114 places, 204 transitions, 1826 flow, removed 22 selfloop flow, removed 1 redundant places. [2024-06-20 16:10:20,749 INFO L231 Difference]: Finished difference. Result has 115 places, 149 transitions, 1236 flow [2024-06-20 16:10:20,750 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1028, PETRI_DIFFERENCE_MINUEND_PLACES=106, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=143, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=118, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1236, PETRI_PLACES=115, PETRI_TRANSITIONS=149} [2024-06-20 16:10:20,750 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 60 predicate places. [2024-06-20 16:10:20,750 INFO L495 AbstractCegarLoop]: Abstraction has has 115 places, 149 transitions, 1236 flow [2024-06-20 16:10:20,750 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.333333333333334) internal successors, (111), 9 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:10:20,750 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:10:20,750 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:10:20,751 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-20 16:10:20,751 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)] === [2024-06-20 16:10:20,751 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:10:20,751 INFO L85 PathProgramCache]: Analyzing trace with hash 1907498261, now seen corresponding path program 2 times [2024-06-20 16:10:20,751 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:10:20,751 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [691553361] [2024-06-20 16:10:20,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:10:20,751 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:10:20,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:10:21,733 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:10:21,733 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:10:21,733 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [691553361] [2024-06-20 16:10:21,734 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [691553361] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:10:21,734 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:10:21,734 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:10:21,734 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [227867270] [2024-06-20 16:10:21,734 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:10:21,734 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:10:21,734 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:10:21,735 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:10:21,735 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:10:21,904 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 52 [2024-06-20 16:10:21,904 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 149 transitions, 1236 flow. Second operand has 9 states, 9 states have (on average 12.333333333333334) internal successors, (111), 9 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:10:21,904 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:10:21,904 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 52 [2024-06-20 16:10:21,904 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:10:24,243 INFO L124 PetriNetUnfolderBase]: 12319/17154 cut-off events. [2024-06-20 16:10:24,243 INFO L125 PetriNetUnfolderBase]: For 446898/447018 co-relation queries the response was YES. [2024-06-20 16:10:24,292 INFO L83 FinitePrefix]: Finished finitePrefix Result has 103387 conditions, 17154 events. 12319/17154 cut-off events. For 446898/447018 co-relation queries the response was YES. Maximal size of possible extension queue 600. Compared 94390 event pairs, 5571 based on Foata normal form. 6/17110 useless extension candidates. Maximal degree in co-relation 103341. Up to 16476 conditions per place. [2024-06-20 16:10:24,365 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 162 selfloop transitions, 22 changer transitions 0/193 dead transitions. [2024-06-20 16:10:24,365 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 122 places, 193 transitions, 1722 flow [2024-06-20 16:10:24,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:10:24,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:10:24,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 190 transitions. [2024-06-20 16:10:24,367 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4567307692307692 [2024-06-20 16:10:24,367 INFO L175 Difference]: Start difference. First operand has 115 places, 149 transitions, 1236 flow. Second operand 8 states and 190 transitions. [2024-06-20 16:10:24,367 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 122 places, 193 transitions, 1722 flow [2024-06-20 16:10:24,595 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 193 transitions, 1578 flow, removed 60 selfloop flow, removed 5 redundant places. [2024-06-20 16:10:24,597 INFO L231 Difference]: Finished difference. Result has 118 places, 149 transitions, 1146 flow [2024-06-20 16:10:24,597 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1092, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=149, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=127, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1146, PETRI_PLACES=118, PETRI_TRANSITIONS=149} [2024-06-20 16:10:24,597 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 63 predicate places. [2024-06-20 16:10:24,597 INFO L495 AbstractCegarLoop]: Abstraction has has 118 places, 149 transitions, 1146 flow [2024-06-20 16:10:24,598 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.333333333333334) internal successors, (111), 9 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:10:24,598 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:10:24,598 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:10:24,598 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-20 16:10:24,598 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-20 16:10:24,598 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:10:24,598 INFO L85 PathProgramCache]: Analyzing trace with hash 204841825, now seen corresponding path program 3 times [2024-06-20 16:10:24,599 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:10:24,599 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2071753368] [2024-06-20 16:10:24,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:10:24,599 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:10:24,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:10:25,553 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:10:25,553 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:10:25,553 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2071753368] [2024-06-20 16:10:25,553 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2071753368] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:10:25,553 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:10:25,553 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:10:25,554 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1232704290] [2024-06-20 16:10:25,554 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:10:25,554 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:10:25,554 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:10:25,554 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:10:25,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:10:25,691 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 52 [2024-06-20 16:10:25,691 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 149 transitions, 1146 flow. Second operand has 9 states, 9 states have (on average 12.333333333333334) internal successors, (111), 9 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:10:25,691 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:10:25,692 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 52 [2024-06-20 16:10:25,692 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:10:28,315 INFO L124 PetriNetUnfolderBase]: 12355/17208 cut-off events. [2024-06-20 16:10:28,316 INFO L125 PetriNetUnfolderBase]: For 476876/477002 co-relation queries the response was YES. [2024-06-20 16:10:28,401 INFO L83 FinitePrefix]: Finished finitePrefix Result has 104674 conditions, 17208 events. 12355/17208 cut-off events. For 476876/477002 co-relation queries the response was YES. Maximal size of possible extension queue 600. Compared 94790 event pairs, 5578 based on Foata normal form. 10/17166 useless extension candidates. Maximal degree in co-relation 104626. Up to 16453 conditions per place. [2024-06-20 16:10:28,485 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 145 selfloop transitions, 39 changer transitions 0/193 dead transitions. [2024-06-20 16:10:28,486 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 125 places, 193 transitions, 1696 flow [2024-06-20 16:10:28,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:10:28,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:10:28,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 191 transitions. [2024-06-20 16:10:28,487 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45913461538461536 [2024-06-20 16:10:28,487 INFO L175 Difference]: Start difference. First operand has 118 places, 149 transitions, 1146 flow. Second operand 8 states and 191 transitions. [2024-06-20 16:10:28,487 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 125 places, 193 transitions, 1696 flow [2024-06-20 16:10:28,755 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 118 places, 193 transitions, 1644 flow, removed 2 selfloop flow, removed 7 redundant places. [2024-06-20 16:10:28,757 INFO L231 Difference]: Finished difference. Result has 119 places, 152 transitions, 1262 flow [2024-06-20 16:10:28,757 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1094, PETRI_DIFFERENCE_MINUEND_PLACES=111, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=149, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=110, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1262, PETRI_PLACES=119, PETRI_TRANSITIONS=152} [2024-06-20 16:10:28,758 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 64 predicate places. [2024-06-20 16:10:28,758 INFO L495 AbstractCegarLoop]: Abstraction has has 119 places, 152 transitions, 1262 flow [2024-06-20 16:10:28,758 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.333333333333334) internal successors, (111), 9 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:10:28,758 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:10:28,758 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:10:28,758 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-20 16:10:28,759 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-20 16:10:28,761 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:10:28,761 INFO L85 PathProgramCache]: Analyzing trace with hash 205026523, now seen corresponding path program 1 times [2024-06-20 16:10:28,761 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:10:28,762 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [885487786] [2024-06-20 16:10:28,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:10:28,762 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:10:28,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:10:30,139 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:10:30,139 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:10:30,139 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [885487786] [2024-06-20 16:10:30,139 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [885487786] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:10:30,139 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:10:30,139 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:10:30,140 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1909106808] [2024-06-20 16:10:30,140 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:10:30,140 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:10:30,140 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:10:30,140 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:10:30,140 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:10:30,285 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 52 [2024-06-20 16:10:30,285 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 152 transitions, 1262 flow. Second operand has 10 states, 10 states have (on average 12.3) internal successors, (123), 10 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:10:30,285 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:10:30,285 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 52 [2024-06-20 16:10:30,285 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:10:32,850 INFO L124 PetriNetUnfolderBase]: 12472/17343 cut-off events. [2024-06-20 16:10:32,851 INFO L125 PetriNetUnfolderBase]: For 524422/524551 co-relation queries the response was YES. [2024-06-20 16:10:32,927 INFO L83 FinitePrefix]: Finished finitePrefix Result has 108622 conditions, 17343 events. 12472/17343 cut-off events. For 524422/524551 co-relation queries the response was YES. Maximal size of possible extension queue 602. Compared 95115 event pairs, 5293 based on Foata normal form. 10/17284 useless extension candidates. Maximal degree in co-relation 108573. Up to 16552 conditions per place. [2024-06-20 16:10:33,009 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 151 selfloop transitions, 39 changer transitions 0/199 dead transitions. [2024-06-20 16:10:33,009 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 199 transitions, 1828 flow [2024-06-20 16:10:33,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:10:33,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:10:33,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 194 transitions. [2024-06-20 16:10:33,011 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46634615384615385 [2024-06-20 16:10:33,011 INFO L175 Difference]: Start difference. First operand has 119 places, 152 transitions, 1262 flow. Second operand 8 states and 194 transitions. [2024-06-20 16:10:33,011 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 199 transitions, 1828 flow [2024-06-20 16:10:33,258 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 199 transitions, 1686 flow, removed 34 selfloop flow, removed 6 redundant places. [2024-06-20 16:10:33,260 INFO L231 Difference]: Finished difference. Result has 121 places, 155 transitions, 1286 flow [2024-06-20 16:10:33,260 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1120, PETRI_DIFFERENCE_MINUEND_PLACES=113, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=152, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=113, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1286, PETRI_PLACES=121, PETRI_TRANSITIONS=155} [2024-06-20 16:10:33,261 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 66 predicate places. [2024-06-20 16:10:33,261 INFO L495 AbstractCegarLoop]: Abstraction has has 121 places, 155 transitions, 1286 flow [2024-06-20 16:10:33,261 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.3) internal successors, (123), 10 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:10:33,261 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:10:33,261 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:10:33,261 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-20 16:10:33,261 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-20 16:10:33,262 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:10:33,262 INFO L85 PathProgramCache]: Analyzing trace with hash -283582066, now seen corresponding path program 1 times [2024-06-20 16:10:33,262 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:10:33,262 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [725910514] [2024-06-20 16:10:33,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:10:33,262 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:10:33,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:10:34,350 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:10:34,350 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:10:34,350 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [725910514] [2024-06-20 16:10:34,350 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [725910514] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:10:34,350 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:10:34,350 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 16:10:34,351 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1617185706] [2024-06-20 16:10:34,351 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:10:34,351 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 16:10:34,351 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:10:34,351 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 16:10:34,351 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-20 16:10:34,470 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 52 [2024-06-20 16:10:34,470 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 121 places, 155 transitions, 1286 flow. Second operand has 7 states, 7 states have (on average 13.857142857142858) internal successors, (97), 7 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:10:34,470 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:10:34,470 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 52 [2024-06-20 16:10:34,471 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:10:36,948 INFO L124 PetriNetUnfolderBase]: 11805/16640 cut-off events. [2024-06-20 16:10:36,948 INFO L125 PetriNetUnfolderBase]: For 560135/560295 co-relation queries the response was YES. [2024-06-20 16:10:37,007 INFO L83 FinitePrefix]: Finished finitePrefix Result has 108064 conditions, 16640 events. 11805/16640 cut-off events. For 560135/560295 co-relation queries the response was YES. Maximal size of possible extension queue 602. Compared 93920 event pairs, 5503 based on Foata normal form. 4/16531 useless extension candidates. Maximal degree in co-relation 108014. Up to 15771 conditions per place. [2024-06-20 16:10:37,083 INFO L140 encePairwiseOnDemand]: 42/52 looper letters, 147 selfloop transitions, 18 changer transitions 0/182 dead transitions. [2024-06-20 16:10:37,083 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 182 transitions, 1744 flow [2024-06-20 16:10:37,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 16:10:37,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 16:10:37,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 144 transitions. [2024-06-20 16:10:37,084 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46153846153846156 [2024-06-20 16:10:37,084 INFO L175 Difference]: Start difference. First operand has 121 places, 155 transitions, 1286 flow. Second operand 6 states and 144 transitions. [2024-06-20 16:10:37,084 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 182 transitions, 1744 flow [2024-06-20 16:10:37,252 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 182 transitions, 1604 flow, removed 33 selfloop flow, removed 6 redundant places. [2024-06-20 16:10:37,254 INFO L231 Difference]: Finished difference. Result has 121 places, 159 transitions, 1266 flow [2024-06-20 16:10:37,254 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1146, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=155, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=137, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1266, PETRI_PLACES=121, PETRI_TRANSITIONS=159} [2024-06-20 16:10:37,255 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 66 predicate places. [2024-06-20 16:10:37,255 INFO L495 AbstractCegarLoop]: Abstraction has has 121 places, 159 transitions, 1266 flow [2024-06-20 16:10:37,255 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.857142857142858) internal successors, (97), 7 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:10:37,255 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:10:37,255 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:10:37,255 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-20 16:10:37,256 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-20 16:10:37,256 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:10:37,256 INFO L85 PathProgramCache]: Analyzing trace with hash 1612959341, now seen corresponding path program 4 times [2024-06-20 16:10:37,256 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:10:37,256 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [809686112] [2024-06-20 16:10:37,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:10:37,256 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:10:37,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:10:38,319 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:10:38,319 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:10:38,319 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [809686112] [2024-06-20 16:10:38,319 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [809686112] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:10:38,319 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:10:38,319 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 16:10:38,319 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [310167313] [2024-06-20 16:10:38,319 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:10:38,320 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 16:10:38,320 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:10:38,320 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 16:10:38,320 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-20 16:10:38,446 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 52 [2024-06-20 16:10:38,446 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 121 places, 159 transitions, 1266 flow. Second operand has 9 states, 9 states have (on average 12.333333333333334) internal successors, (111), 9 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:10:38,446 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:10:38,446 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 52 [2024-06-20 16:10:38,446 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:10:41,083 INFO L124 PetriNetUnfolderBase]: 12489/17363 cut-off events. [2024-06-20 16:10:41,083 INFO L125 PetriNetUnfolderBase]: For 603198/603352 co-relation queries the response was YES. [2024-06-20 16:10:41,149 INFO L83 FinitePrefix]: Finished finitePrefix Result has 114924 conditions, 17363 events. 12489/17363 cut-off events. For 603198/603352 co-relation queries the response was YES. Maximal size of possible extension queue 602. Compared 95226 event pairs, 5542 based on Foata normal form. 6/17296 useless extension candidates. Maximal degree in co-relation 114873. Up to 16635 conditions per place. [2024-06-20 16:10:41,235 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 154 selfloop transitions, 38 changer transitions 0/201 dead transitions. [2024-06-20 16:10:41,236 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 201 transitions, 1838 flow [2024-06-20 16:10:41,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:10:41,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:10:41,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 188 transitions. [2024-06-20 16:10:41,237 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4519230769230769 [2024-06-20 16:10:41,237 INFO L175 Difference]: Start difference. First operand has 121 places, 159 transitions, 1266 flow. Second operand 8 states and 188 transitions. [2024-06-20 16:10:41,237 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 201 transitions, 1838 flow [2024-06-20 16:10:41,518 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 201 transitions, 1756 flow, removed 26 selfloop flow, removed 4 redundant places. [2024-06-20 16:10:41,520 INFO L231 Difference]: Finished difference. Result has 125 places, 162 transitions, 1362 flow [2024-06-20 16:10:41,520 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1184, PETRI_DIFFERENCE_MINUEND_PLACES=117, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=159, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=121, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1362, PETRI_PLACES=125, PETRI_TRANSITIONS=162} [2024-06-20 16:10:41,521 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 70 predicate places. [2024-06-20 16:10:41,521 INFO L495 AbstractCegarLoop]: Abstraction has has 125 places, 162 transitions, 1362 flow [2024-06-20 16:10:41,521 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.333333333333334) internal successors, (111), 9 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:10:41,521 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:10:41,521 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:10:41,521 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-20 16:10:41,521 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-20 16:10:41,522 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:10:41,522 INFO L85 PathProgramCache]: Analyzing trace with hash 1841045189, now seen corresponding path program 2 times [2024-06-20 16:10:41,522 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:10:41,522 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [742917112] [2024-06-20 16:10:41,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:10:41,522 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:10:41,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:10:42,978 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:10:42,978 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:10:42,978 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [742917112] [2024-06-20 16:10:42,978 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [742917112] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:10:42,978 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:10:42,979 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:10:42,979 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [803205563] [2024-06-20 16:10:42,979 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:10:42,979 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:10:42,979 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:10:42,980 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:10:42,980 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:10:43,107 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 52 [2024-06-20 16:10:43,108 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 162 transitions, 1362 flow. Second operand has 10 states, 10 states have (on average 12.3) internal successors, (123), 10 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:10:43,108 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:10:43,108 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 52 [2024-06-20 16:10:43,108 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:10:45,749 INFO L124 PetriNetUnfolderBase]: 12525/17421 cut-off events. [2024-06-20 16:10:45,749 INFO L125 PetriNetUnfolderBase]: For 653407/653570 co-relation queries the response was YES. [2024-06-20 16:10:45,834 INFO L83 FinitePrefix]: Finished finitePrefix Result has 118281 conditions, 17421 events. 12525/17421 cut-off events. For 653407/653570 co-relation queries the response was YES. Maximal size of possible extension queue 602. Compared 95404 event pairs, 5259 based on Foata normal form. 12/17362 useless extension candidates. Maximal degree in co-relation 118229. Up to 16625 conditions per place. [2024-06-20 16:10:45,916 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 158 selfloop transitions, 39 changer transitions 0/206 dead transitions. [2024-06-20 16:10:45,917 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 132 places, 206 transitions, 1946 flow [2024-06-20 16:10:45,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:10:45,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:10:45,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 189 transitions. [2024-06-20 16:10:45,923 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4543269230769231 [2024-06-20 16:10:45,923 INFO L175 Difference]: Start difference. First operand has 125 places, 162 transitions, 1362 flow. Second operand 8 states and 189 transitions. [2024-06-20 16:10:45,923 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 132 places, 206 transitions, 1946 flow [2024-06-20 16:10:46,250 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 126 places, 206 transitions, 1794 flow, removed 40 selfloop flow, removed 6 redundant places. [2024-06-20 16:10:46,253 INFO L231 Difference]: Finished difference. Result has 127 places, 165 transitions, 1388 flow [2024-06-20 16:10:46,253 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1210, PETRI_DIFFERENCE_MINUEND_PLACES=119, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=162, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=123, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1388, PETRI_PLACES=127, PETRI_TRANSITIONS=165} [2024-06-20 16:10:46,255 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 72 predicate places. [2024-06-20 16:10:46,255 INFO L495 AbstractCegarLoop]: Abstraction has has 127 places, 165 transitions, 1388 flow [2024-06-20 16:10:46,255 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.3) internal successors, (123), 10 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:10:46,256 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:10:46,256 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:10:46,256 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-20 16:10:46,256 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-20 16:10:46,256 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:10:46,256 INFO L85 PathProgramCache]: Analyzing trace with hash 1849616069, now seen corresponding path program 3 times [2024-06-20 16:10:46,256 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:10:46,256 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [969286313] [2024-06-20 16:10:46,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:10:46,257 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:10:46,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:10:47,677 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:10:47,678 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:10:47,678 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [969286313] [2024-06-20 16:10:47,679 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [969286313] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:10:47,679 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:10:47,679 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:10:47,679 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1132963867] [2024-06-20 16:10:47,679 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:10:47,679 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:10:47,679 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:10:47,680 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:10:47,680 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:10:47,788 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 52 [2024-06-20 16:10:47,788 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 127 places, 165 transitions, 1388 flow. Second operand has 10 states, 10 states have (on average 12.3) internal successors, (123), 10 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:10:47,788 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:10:47,789 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 52 [2024-06-20 16:10:47,789 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 16:10:50,734 INFO L124 PetriNetUnfolderBase]: 12561/17473 cut-off events. [2024-06-20 16:10:50,735 INFO L125 PetriNetUnfolderBase]: For 702250/702413 co-relation queries the response was YES. [2024-06-20 16:10:50,815 INFO L83 FinitePrefix]: Finished finitePrefix Result has 121585 conditions, 17473 events. 12561/17473 cut-off events. For 702250/702413 co-relation queries the response was YES. Maximal size of possible extension queue 602. Compared 95972 event pairs, 4999 based on Foata normal form. 12/17414 useless extension candidates. Maximal degree in co-relation 121532. Up to 16540 conditions per place. [2024-06-20 16:10:50,903 INFO L140 encePairwiseOnDemand]: 40/52 looper letters, 156 selfloop transitions, 50 changer transitions 0/215 dead transitions. [2024-06-20 16:10:50,904 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 134 places, 215 transitions, 2260 flow [2024-06-20 16:10:50,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 16:10:50,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 16:10:50,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 192 transitions. [2024-06-20 16:10:50,905 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46153846153846156 [2024-06-20 16:10:50,905 INFO L175 Difference]: Start difference. First operand has 127 places, 165 transitions, 1388 flow. Second operand 8 states and 192 transitions. [2024-06-20 16:10:50,905 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 134 places, 215 transitions, 2260 flow [2024-06-20 16:10:51,223 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 215 transitions, 2108 flow, removed 39 selfloop flow, removed 6 redundant places. [2024-06-20 16:10:51,226 INFO L231 Difference]: Finished difference. Result has 129 places, 171 transitions, 1532 flow [2024-06-20 16:10:51,226 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=52, PETRI_DIFFERENCE_MINUEND_FLOW=1236, PETRI_DIFFERENCE_MINUEND_PLACES=121, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=165, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=118, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1532, PETRI_PLACES=129, PETRI_TRANSITIONS=171} [2024-06-20 16:10:51,227 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 74 predicate places. [2024-06-20 16:10:51,227 INFO L495 AbstractCegarLoop]: Abstraction has has 129 places, 171 transitions, 1532 flow [2024-06-20 16:10:51,227 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.3) internal successors, (123), 10 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:10:51,227 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 16:10:51,227 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 16:10:51,227 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-20 16:10:51,227 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-20 16:10:51,228 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 16:10:51,228 INFO L85 PathProgramCache]: Analyzing trace with hash 1613144039, now seen corresponding path program 4 times [2024-06-20 16:10:51,228 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 16:10:51,228 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2139580722] [2024-06-20 16:10:51,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 16:10:51,228 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 16:10:51,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 16:10:52,582 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 16:10:52,582 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 16:10:52,582 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2139580722] [2024-06-20 16:10:52,582 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2139580722] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 16:10:52,582 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 16:10:52,582 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 16:10:52,582 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1546452765] [2024-06-20 16:10:52,583 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 16:10:52,583 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 16:10:52,584 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 16:10:52,584 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 16:10:52,584 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-20 16:10:52,728 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 52 [2024-06-20 16:10:52,728 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 129 places, 171 transitions, 1532 flow. Second operand has 10 states, 10 states have (on average 12.3) internal successors, (123), 10 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 16:10:52,728 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 16:10:52,728 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 52 [2024-06-20 16:10:52,728 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand