./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/mix057_power.opt_pso.opt_rmo.opt_tso.oepc_tso.opt.i --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --validate ./goblint.2024-06-19_11-23-25.files/mutex-meet-nonrel/mix057_power.opt_pso.opt_rmo.opt_tso.oepc_tso.opt.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version eb4cb34f Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReachWitnessValidation.xml -i ../../../trunk/examples/svcomp/pthread-wmm/mix057_power.opt_pso.opt_rmo.opt_tso.oepc_tso.opt.i ./goblint.2024-06-19_11-23-25.files/mutex-meet-nonrel/mix057_power.opt_pso.opt_rmo.opt_tso.oepc_tso.opt.yml/witness.yml -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --traceabstraction.compute.hoare.annotation.of.negated.interpolant.automaton,.abstraction.and.cfg false --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.fs.goblint-validation-eb4cb34-m [2024-06-21 21:18:39,443 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-21 21:18:39,505 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-21 21:18:39,509 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-21 21:18:39,510 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-21 21:18:39,531 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-21 21:18:39,531 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-21 21:18:39,532 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-21 21:18:39,532 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-21 21:18:39,536 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-21 21:18:39,536 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-21 21:18:39,536 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-21 21:18:39,537 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-21 21:18:39,538 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-21 21:18:39,538 INFO L153 SettingsManager]: * Use SBE=true [2024-06-21 21:18:39,538 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-21 21:18:39,538 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-21 21:18:39,539 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-21 21:18:39,539 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-21 21:18:39,539 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-21 21:18:39,539 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-21 21:18:39,540 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-21 21:18:39,540 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-21 21:18:39,540 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-21 21:18:39,540 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-21 21:18:39,541 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-21 21:18:39,541 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-21 21:18:39,541 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-21 21:18:39,542 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-21 21:18:39,542 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-21 21:18:39,543 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-21 21:18:39,543 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-21 21:18:39,543 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-21 21:18:39,543 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-21 21:18:39,543 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-21 21:18:39,543 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-21 21:18:39,544 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-21 21:18:39,544 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-21 21:18:39,544 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-21 21:18:39,544 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-21 21:18:39,544 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-21 21:18:39,545 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-21 21:18:39,545 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-21 21:18:39,545 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-21 21:18:39,752 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-21 21:18:39,778 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-21 21:18:39,780 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-21 21:18:39,781 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-21 21:18:39,781 INFO L274 PluginConnector]: CDTParser initialized [2024-06-21 21:18:39,782 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/mix057_power.opt_pso.opt_rmo.opt_tso.oepc_tso.opt.i [2024-06-21 21:18:40,818 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-21 21:18:41,009 INFO L384 CDTParser]: Found 1 translation units. [2024-06-21 21:18:41,009 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/mix057_power.opt_pso.opt_rmo.opt_tso.oepc_tso.opt.i [2024-06-21 21:18:41,019 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/86e6f67eb/37a2eb1fe81c405585c5d9cc1f1945ba/FLAG58665a4d4 [2024-06-21 21:18:41,028 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/86e6f67eb/37a2eb1fe81c405585c5d9cc1f1945ba [2024-06-21 21:18:41,030 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-21 21:18:41,033 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-21 21:18:41,034 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-06-19_11-23-25.files/mutex-meet-nonrel/mix057_power.opt_pso.opt_rmo.opt_tso.oepc_tso.opt.yml/witness.yml [2024-06-21 21:18:41,234 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-21 21:18:41,236 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-21 21:18:41,237 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-21 21:18:41,237 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-21 21:18:41,241 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-21 21:18:41,241 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.06 09:18:41" (1/2) ... [2024-06-21 21:18:41,242 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1b148d6a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 09:18:41, skipping insertion in model container [2024-06-21 21:18:41,242 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.06 09:18:41" (1/2) ... [2024-06-21 21:18:41,243 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@1738ac54 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 09:18:41, skipping insertion in model container [2024-06-21 21:18:41,243 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 09:18:41" (2/2) ... [2024-06-21 21:18:41,244 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1b148d6a and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 09:18:41, skipping insertion in model container [2024-06-21 21:18:41,244 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 09:18:41" (2/2) ... [2024-06-21 21:18:41,244 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-21 21:18:41,338 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-21 21:18:41,339 INFO L97 edCorrectnessWitness]: Location invariant before [L839-L839] (((((((((((((((((((! multithreaded || z$r_buff0_thd0 == (_Bool)0) && (! multithreaded || (z$w_buff1 == 0 || z$w_buff1 == 2))) && (! multithreaded || ((y == 0 || y == 1) || y == 2))) && (! multithreaded || (((((((((((((((((((0 <= __unbuffered_cnt && z$flush_delayed == (_Bool)0) && z$r_buff0_thd0 == (_Bool)0) && z$r_buff0_thd1 == (_Bool)0) && z$r_buff0_thd2 == (_Bool)0) && z$r_buff0_thd3 == (_Bool)0) && z$r_buff1_thd0 == (_Bool)0) && z$r_buff1_thd1 == (_Bool)0) && z$r_buff1_thd2 == (_Bool)0) && z$r_buff1_thd3 == (_Bool)0) && z$read_delayed == (_Bool)0) && z$read_delayed_var == 0) && (__unbuffered_p3_EAX == 0 || __unbuffered_p3_EAX == 1)) && (a == 0 || a == 1)) && (z$w_buff0 == 0 || z$w_buff0 == 2)) && (z$w_buff1 == 0 || z$w_buff1 == 2)) && ((x == 0 || x == 1) || x == 2)) && ((y == 0 || y == 1) || y == 2)) && ((z == 0 || z == 1) || z == 2)) && ((z$mem_tmp == 0 || z$mem_tmp == 1) || z$mem_tmp == 2)))) && (! multithreaded || z$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || z$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || ((z$mem_tmp == 0 || z$mem_tmp == 1) || z$mem_tmp == 2))) && (! multithreaded || ((x == 0 || x == 1) || x == 2))) && (! multithreaded || ((z == 0 || z == 1) || z == 2))) && (! multithreaded || z$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || z$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || z$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || (z$w_buff0 == 0 || z$w_buff0 == 2))) && (! multithreaded || z$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || (a == 0 || a == 1))) && (! multithreaded || (__unbuffered_p3_EAX == 0 || __unbuffered_p3_EAX == 1))) && (! multithreaded || z$read_delayed_var == 0)) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || z$read_delayed == (_Bool)0)) && (! multithreaded || z$r_buff1_thd0 == (_Bool)0) [2024-06-21 21:18:41,339 INFO L97 edCorrectnessWitness]: Location invariant before [L837-L837] (((((((((((((((((((! multithreaded || z$r_buff0_thd0 == (_Bool)0) && (! multithreaded || (z$w_buff1 == 0 || z$w_buff1 == 2))) && (! multithreaded || ((y == 0 || y == 1) || y == 2))) && (! multithreaded || (((((((((((((((((((0 <= __unbuffered_cnt && z$flush_delayed == (_Bool)0) && z$r_buff0_thd0 == (_Bool)0) && z$r_buff0_thd1 == (_Bool)0) && z$r_buff0_thd2 == (_Bool)0) && z$r_buff0_thd3 == (_Bool)0) && z$r_buff1_thd0 == (_Bool)0) && z$r_buff1_thd1 == (_Bool)0) && z$r_buff1_thd2 == (_Bool)0) && z$r_buff1_thd3 == (_Bool)0) && z$read_delayed == (_Bool)0) && z$read_delayed_var == 0) && (__unbuffered_p3_EAX == 0 || __unbuffered_p3_EAX == 1)) && (a == 0 || a == 1)) && (z$w_buff0 == 0 || z$w_buff0 == 2)) && (z$w_buff1 == 0 || z$w_buff1 == 2)) && ((x == 0 || x == 1) || x == 2)) && ((y == 0 || y == 1) || y == 2)) && ((z == 0 || z == 1) || z == 2)) && ((z$mem_tmp == 0 || z$mem_tmp == 1) || z$mem_tmp == 2)))) && (! multithreaded || z$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || z$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || ((z$mem_tmp == 0 || z$mem_tmp == 1) || z$mem_tmp == 2))) && (! multithreaded || ((x == 0 || x == 1) || x == 2))) && (! multithreaded || ((z == 0 || z == 1) || z == 2))) && (! multithreaded || z$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || z$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || z$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || (z$w_buff0 == 0 || z$w_buff0 == 2))) && (! multithreaded || z$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || (a == 0 || a == 1))) && (! multithreaded || (__unbuffered_p3_EAX == 0 || __unbuffered_p3_EAX == 1))) && (! multithreaded || z$read_delayed_var == 0)) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || z$read_delayed == (_Bool)0)) && (! multithreaded || z$r_buff1_thd0 == (_Bool)0) [2024-06-21 21:18:41,339 INFO L97 edCorrectnessWitness]: Location invariant before [L842-L842] (((((((((((((((((((! multithreaded || z$r_buff0_thd0 == (_Bool)0) && (! multithreaded || (z$w_buff1 == 0 || z$w_buff1 == 2))) && (! multithreaded || ((y == 0 || y == 1) || y == 2))) && (! multithreaded || (((((((((((((((((((0 <= __unbuffered_cnt && z$flush_delayed == (_Bool)0) && z$r_buff0_thd0 == (_Bool)0) && z$r_buff0_thd1 == (_Bool)0) && z$r_buff0_thd2 == (_Bool)0) && z$r_buff0_thd3 == (_Bool)0) && z$r_buff1_thd0 == (_Bool)0) && z$r_buff1_thd1 == (_Bool)0) && z$r_buff1_thd2 == (_Bool)0) && z$r_buff1_thd3 == (_Bool)0) && z$read_delayed == (_Bool)0) && z$read_delayed_var == 0) && (__unbuffered_p3_EAX == 0 || __unbuffered_p3_EAX == 1)) && (a == 0 || a == 1)) && (z$w_buff0 == 0 || z$w_buff0 == 2)) && (z$w_buff1 == 0 || z$w_buff1 == 2)) && ((x == 0 || x == 1) || x == 2)) && ((y == 0 || y == 1) || y == 2)) && ((z == 0 || z == 1) || z == 2)) && ((z$mem_tmp == 0 || z$mem_tmp == 1) || z$mem_tmp == 2)))) && (! multithreaded || z$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || z$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || ((z$mem_tmp == 0 || z$mem_tmp == 1) || z$mem_tmp == 2))) && (! multithreaded || ((x == 0 || x == 1) || x == 2))) && (! multithreaded || ((z == 0 || z == 1) || z == 2))) && (! multithreaded || z$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || z$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || z$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || (z$w_buff0 == 0 || z$w_buff0 == 2))) && (! multithreaded || z$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || (a == 0 || a == 1))) && (! multithreaded || (__unbuffered_p3_EAX == 0 || __unbuffered_p3_EAX == 1))) && (! multithreaded || z$read_delayed_var == 0)) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || z$read_delayed == (_Bool)0)) && (! multithreaded || z$r_buff1_thd0 == (_Bool)0) [2024-06-21 21:18:41,340 INFO L97 edCorrectnessWitness]: Location invariant before [L841-L841] (((((((((((((((((((! multithreaded || z$r_buff0_thd0 == (_Bool)0) && (! multithreaded || (z$w_buff1 == 0 || z$w_buff1 == 2))) && (! multithreaded || ((y == 0 || y == 1) || y == 2))) && (! multithreaded || (((((((((((((((((((0 <= __unbuffered_cnt && z$flush_delayed == (_Bool)0) && z$r_buff0_thd0 == (_Bool)0) && z$r_buff0_thd1 == (_Bool)0) && z$r_buff0_thd2 == (_Bool)0) && z$r_buff0_thd3 == (_Bool)0) && z$r_buff1_thd0 == (_Bool)0) && z$r_buff1_thd1 == (_Bool)0) && z$r_buff1_thd2 == (_Bool)0) && z$r_buff1_thd3 == (_Bool)0) && z$read_delayed == (_Bool)0) && z$read_delayed_var == 0) && (__unbuffered_p3_EAX == 0 || __unbuffered_p3_EAX == 1)) && (a == 0 || a == 1)) && (z$w_buff0 == 0 || z$w_buff0 == 2)) && (z$w_buff1 == 0 || z$w_buff1 == 2)) && ((x == 0 || x == 1) || x == 2)) && ((y == 0 || y == 1) || y == 2)) && ((z == 0 || z == 1) || z == 2)) && ((z$mem_tmp == 0 || z$mem_tmp == 1) || z$mem_tmp == 2)))) && (! multithreaded || z$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || z$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || ((z$mem_tmp == 0 || z$mem_tmp == 1) || z$mem_tmp == 2))) && (! multithreaded || ((x == 0 || x == 1) || x == 2))) && (! multithreaded || ((z == 0 || z == 1) || z == 2))) && (! multithreaded || z$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || z$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || z$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || (z$w_buff0 == 0 || z$w_buff0 == 2))) && (! multithreaded || z$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || (a == 0 || a == 1))) && (! multithreaded || (__unbuffered_p3_EAX == 0 || __unbuffered_p3_EAX == 1))) && (! multithreaded || z$read_delayed_var == 0)) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || z$read_delayed == (_Bool)0)) && (! multithreaded || z$r_buff1_thd0 == (_Bool)0) [2024-06-21 21:18:41,340 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-21 21:18:41,340 INFO L106 edCorrectnessWitness]: ghost_update [L835-L835] multithreaded = 1; [2024-06-21 21:18:41,379 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-21 21:18:41,648 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-21 21:18:41,663 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-21 21:18:41,803 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-21 21:18:41,836 INFO L206 MainTranslator]: Completed translation [2024-06-21 21:18:41,836 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 09:18:41 WrapperNode [2024-06-21 21:18:41,836 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-21 21:18:41,837 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-21 21:18:41,837 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-21 21:18:41,837 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-21 21:18:41,842 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 09:18:41" (1/1) ... [2024-06-21 21:18:41,854 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 09:18:41" (1/1) ... [2024-06-21 21:18:41,882 INFO L138 Inliner]: procedures = 176, calls = 52, calls flagged for inlining = 6, calls inlined = 7, statements flattened = 155 [2024-06-21 21:18:41,882 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-21 21:18:41,883 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-21 21:18:41,883 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-21 21:18:41,883 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-21 21:18:41,891 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 09:18:41" (1/1) ... [2024-06-21 21:18:41,891 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 09:18:41" (1/1) ... [2024-06-21 21:18:41,894 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 09:18:41" (1/1) ... [2024-06-21 21:18:41,907 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2024-06-21 21:18:41,907 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 09:18:41" (1/1) ... [2024-06-21 21:18:41,907 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 09:18:41" (1/1) ... [2024-06-21 21:18:41,915 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 09:18:41" (1/1) ... [2024-06-21 21:18:41,917 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 09:18:41" (1/1) ... [2024-06-21 21:18:41,918 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 09:18:41" (1/1) ... [2024-06-21 21:18:41,920 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 09:18:41" (1/1) ... [2024-06-21 21:18:41,922 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-21 21:18:41,923 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-21 21:18:41,923 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-21 21:18:41,923 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-21 21:18:41,924 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 09:18:41" (1/1) ... [2024-06-21 21:18:41,928 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-21 21:18:41,934 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-21 21:18:41,945 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-06-21 21:18:41,962 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-06-21 21:18:41,977 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-21 21:18:41,977 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-21 21:18:41,977 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-21 21:18:41,977 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-21 21:18:41,977 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-21 21:18:41,977 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-21 21:18:41,977 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-21 21:18:41,978 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-21 21:18:41,978 INFO L130 BoogieDeclarations]: Found specification of procedure P3 [2024-06-21 21:18:41,978 INFO L138 BoogieDeclarations]: Found implementation of procedure P3 [2024-06-21 21:18:41,978 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-21 21:18:41,978 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-21 21:18:41,978 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-21 21:18:41,978 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-21 21:18:41,979 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-21 21:18:42,068 INFO L244 CfgBuilder]: Building ICFG [2024-06-21 21:18:42,070 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-21 21:18:42,486 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-21 21:18:42,487 INFO L293 CfgBuilder]: Performing block encoding [2024-06-21 21:18:42,622 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-21 21:18:42,623 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-21 21:18:42,623 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.06 09:18:42 BoogieIcfgContainer [2024-06-21 21:18:42,623 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-21 21:18:42,625 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-21 21:18:42,625 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-21 21:18:42,627 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-21 21:18:42,628 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.06 09:18:41" (1/4) ... [2024-06-21 21:18:42,628 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5c73e6b0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.06 09:18:42, skipping insertion in model container [2024-06-21 21:18:42,628 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 09:18:41" (2/4) ... [2024-06-21 21:18:42,628 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5c73e6b0 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 21.06 09:18:42, skipping insertion in model container [2024-06-21 21:18:42,629 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 09:18:41" (3/4) ... [2024-06-21 21:18:42,629 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5c73e6b0 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 21.06 09:18:42, skipping insertion in model container [2024-06-21 21:18:42,629 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.06 09:18:42" (4/4) ... [2024-06-21 21:18:42,630 INFO L112 eAbstractionObserver]: Analyzing ICFG mix057_power.opt_pso.opt_rmo.opt_tso.oepc_tso.opt.i [2024-06-21 21:18:42,642 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-21 21:18:42,643 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 4 error locations. [2024-06-21 21:18:42,643 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-21 21:18:42,681 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-21 21:18:42,707 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 64 places, 51 transitions, 118 flow [2024-06-21 21:18:42,735 INFO L124 PetriNetUnfolderBase]: 0/47 cut-off events. [2024-06-21 21:18:42,735 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-21 21:18:42,736 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60 conditions, 47 events. 0/47 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 83 event pairs, 0 based on Foata normal form. 0/43 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2024-06-21 21:18:42,736 INFO L82 GeneralOperation]: Start removeDead. Operand has 64 places, 51 transitions, 118 flow [2024-06-21 21:18:42,739 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 54 places, 41 transitions, 94 flow [2024-06-21 21:18:42,750 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-21 21:18:42,756 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;@6d306055, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-21 21:18:42,756 INFO L358 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2024-06-21 21:18:42,760 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-21 21:18:42,760 INFO L124 PetriNetUnfolderBase]: 0/6 cut-off events. [2024-06-21 21:18:42,760 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-21 21:18:42,760 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:18:42,761 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-06-21 21:18:42,761 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)] === [2024-06-21 21:18:42,765 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:18:42,765 INFO L85 PathProgramCache]: Analyzing trace with hash 375576810, now seen corresponding path program 1 times [2024-06-21 21:18:42,773 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:18:42,773 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1556137102] [2024-06-21 21:18:42,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:18:42,774 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:18:42,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:18:43,508 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:18:43,509 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:18:43,510 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1556137102] [2024-06-21 21:18:43,510 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1556137102] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:18:43,511 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:18:43,511 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-21 21:18:43,512 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [798520454] [2024-06-21 21:18:43,512 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:18:43,518 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-21 21:18:43,522 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:18:43,541 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-21 21:18:43,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-21 21:18:43,572 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 51 [2024-06-21 21:18:43,574 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 41 transitions, 94 flow. Second operand has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 3 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:18:43,574 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:18:43,574 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 51 [2024-06-21 21:18:43,575 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:18:44,729 INFO L124 PetriNetUnfolderBase]: 8152/11425 cut-off events. [2024-06-21 21:18:44,729 INFO L125 PetriNetUnfolderBase]: For 178/178 co-relation queries the response was YES. [2024-06-21 21:18:44,745 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22912 conditions, 11425 events. 8152/11425 cut-off events. For 178/178 co-relation queries the response was YES. Maximal size of possible extension queue 439. Compared 62217 event pairs, 6174 based on Foata normal form. 1/11241 useless extension candidates. Maximal degree in co-relation 22899. Up to 11108 conditions per place. [2024-06-21 21:18:44,789 INFO L140 encePairwiseOnDemand]: 42/51 looper letters, 42 selfloop transitions, 5 changer transitions 0/55 dead transitions. [2024-06-21 21:18:44,789 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 55 transitions, 225 flow [2024-06-21 21:18:44,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-21 21:18:44,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-21 21:18:44,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 93 transitions. [2024-06-21 21:18:44,799 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6078431372549019 [2024-06-21 21:18:44,800 INFO L175 Difference]: Start difference. First operand has 54 places, 41 transitions, 94 flow. Second operand 3 states and 93 transitions. [2024-06-21 21:18:44,801 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 55 transitions, 225 flow [2024-06-21 21:18:44,803 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 55 transitions, 218 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-06-21 21:18:44,807 INFO L231 Difference]: Finished difference. Result has 53 places, 45 transitions, 129 flow [2024-06-21 21:18:44,809 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=90, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=129, PETRI_PLACES=53, PETRI_TRANSITIONS=45} [2024-06-21 21:18:44,811 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, -1 predicate places. [2024-06-21 21:18:44,812 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 45 transitions, 129 flow [2024-06-21 21:18:44,812 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 3 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:18:44,812 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:18:44,813 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:18:44,813 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-21 21:18:44,813 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)] === [2024-06-21 21:18:44,813 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:18:44,814 INFO L85 PathProgramCache]: Analyzing trace with hash 152353751, now seen corresponding path program 1 times [2024-06-21 21:18:44,814 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:18:44,814 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1678501794] [2024-06-21 21:18:44,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:18:44,814 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:18:44,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:18:45,380 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:18:45,380 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:18:45,380 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1678501794] [2024-06-21 21:18:45,381 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1678501794] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:18:45,381 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:18:45,381 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-21 21:18:45,381 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1194813121] [2024-06-21 21:18:45,381 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:18:45,384 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-21 21:18:45,384 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:18:45,384 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-21 21:18:45,385 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-21 21:18:45,411 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 51 [2024-06-21 21:18:45,412 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 45 transitions, 129 flow. Second operand has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:18:45,412 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:18:45,412 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 51 [2024-06-21 21:18:45,412 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:18:46,520 INFO L124 PetriNetUnfolderBase]: 9537/13006 cut-off events. [2024-06-21 21:18:46,520 INFO L125 PetriNetUnfolderBase]: For 2493/2493 co-relation queries the response was YES. [2024-06-21 21:18:46,536 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29769 conditions, 13006 events. 9537/13006 cut-off events. For 2493/2493 co-relation queries the response was YES. Maximal size of possible extension queue 487. Compared 68184 event pairs, 6489 based on Foata normal form. 4/13003 useless extension candidates. Maximal degree in co-relation 29757. Up to 12918 conditions per place. [2024-06-21 21:18:46,578 INFO L140 encePairwiseOnDemand]: 41/51 looper letters, 53 selfloop transitions, 9 changer transitions 0/69 dead transitions. [2024-06-21 21:18:46,579 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 69 transitions, 319 flow [2024-06-21 21:18:46,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-21 21:18:46,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-21 21:18:46,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 118 transitions. [2024-06-21 21:18:46,580 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5784313725490197 [2024-06-21 21:18:46,580 INFO L175 Difference]: Start difference. First operand has 53 places, 45 transitions, 129 flow. Second operand 4 states and 118 transitions. [2024-06-21 21:18:46,580 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 69 transitions, 319 flow [2024-06-21 21:18:46,582 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 69 transitions, 314 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-21 21:18:46,583 INFO L231 Difference]: Finished difference. Result has 56 places, 49 transitions, 177 flow [2024-06-21 21:18:46,583 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=124, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=177, PETRI_PLACES=56, PETRI_TRANSITIONS=49} [2024-06-21 21:18:46,583 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 2 predicate places. [2024-06-21 21:18:46,584 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 49 transitions, 177 flow [2024-06-21 21:18:46,584 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:18:46,584 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:18:46,584 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:18:46,584 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-21 21:18:46,584 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)] === [2024-06-21 21:18:46,585 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:18:46,585 INFO L85 PathProgramCache]: Analyzing trace with hash 428000069, now seen corresponding path program 1 times [2024-06-21 21:18:46,585 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:18:46,585 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [439599850] [2024-06-21 21:18:46,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:18:46,586 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:18:46,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:18:47,108 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:18:47,108 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:18:47,109 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [439599850] [2024-06-21 21:18:47,109 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [439599850] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:18:47,109 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:18:47,109 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-21 21:18:47,109 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [711191065] [2024-06-21 21:18:47,109 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:18:47,110 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-21 21:18:47,110 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:18:47,111 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-21 21:18:47,112 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-21 21:18:47,156 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 51 [2024-06-21 21:18:47,157 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 49 transitions, 177 flow. Second operand has 5 states, 5 states have (on average 14.2) internal successors, (71), 5 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:18:47,157 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:18:47,157 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 51 [2024-06-21 21:18:47,157 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:18:48,321 INFO L124 PetriNetUnfolderBase]: 9555/13087 cut-off events. [2024-06-21 21:18:48,321 INFO L125 PetriNetUnfolderBase]: For 7234/7234 co-relation queries the response was YES. [2024-06-21 21:18:48,339 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33312 conditions, 13087 events. 9555/13087 cut-off events. For 7234/7234 co-relation queries the response was YES. Maximal size of possible extension queue 490. Compared 69174 event pairs, 5076 based on Foata normal form. 7/13091 useless extension candidates. Maximal degree in co-relation 33298. Up to 12839 conditions per place. [2024-06-21 21:18:48,387 INFO L140 encePairwiseOnDemand]: 39/51 looper letters, 71 selfloop transitions, 21 changer transitions 0/99 dead transitions. [2024-06-21 21:18:48,387 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 99 transitions, 535 flow [2024-06-21 21:18:48,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 21:18:48,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 21:18:48,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 155 transitions. [2024-06-21 21:18:48,389 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6078431372549019 [2024-06-21 21:18:48,389 INFO L175 Difference]: Start difference. First operand has 56 places, 49 transitions, 177 flow. Second operand 5 states and 155 transitions. [2024-06-21 21:18:48,389 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 99 transitions, 535 flow [2024-06-21 21:18:48,391 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 99 transitions, 516 flow, removed 3 selfloop flow, removed 2 redundant places. [2024-06-21 21:18:48,394 INFO L231 Difference]: Finished difference. Result has 61 places, 63 transitions, 308 flow [2024-06-21 21:18:48,394 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=158, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=308, PETRI_PLACES=61, PETRI_TRANSITIONS=63} [2024-06-21 21:18:48,395 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 7 predicate places. [2024-06-21 21:18:48,395 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 63 transitions, 308 flow [2024-06-21 21:18:48,395 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.2) internal successors, (71), 5 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:18:48,395 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:18:48,395 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:18:48,396 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-21 21:18:48,396 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 21:18:48,396 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:18:48,396 INFO L85 PathProgramCache]: Analyzing trace with hash -148694574, now seen corresponding path program 1 times [2024-06-21 21:18:48,396 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:18:48,397 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [158746976] [2024-06-21 21:18:48,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:18:48,397 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:18:48,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:18:49,032 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:18:49,032 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:18:49,032 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [158746976] [2024-06-21 21:18:49,032 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [158746976] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:18:49,033 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:18:49,033 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 21:18:49,033 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [503695632] [2024-06-21 21:18:49,033 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:18:49,033 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 21:18:49,034 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:18:49,034 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 21:18:49,034 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-21 21:18:49,071 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 51 [2024-06-21 21:18:49,072 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 63 transitions, 308 flow. Second operand has 6 states, 6 states have (on average 14.166666666666666) internal successors, (85), 6 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:18:49,072 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:18:49,072 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 51 [2024-06-21 21:18:49,072 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:18:50,309 INFO L124 PetriNetUnfolderBase]: 9584/13130 cut-off events. [2024-06-21 21:18:50,310 INFO L125 PetriNetUnfolderBase]: For 17340/17345 co-relation queries the response was YES. [2024-06-21 21:18:50,332 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39031 conditions, 13130 events. 9584/13130 cut-off events. For 17340/17345 co-relation queries the response was YES. Maximal size of possible extension queue 490. Compared 69441 event pairs, 4111 based on Foata normal form. 18/13145 useless extension candidates. Maximal degree in co-relation 39014. Up to 12804 conditions per place. [2024-06-21 21:18:50,378 INFO L140 encePairwiseOnDemand]: 39/51 looper letters, 78 selfloop transitions, 25 changer transitions 0/110 dead transitions. [2024-06-21 21:18:50,378 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 110 transitions, 680 flow [2024-06-21 21:18:50,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 21:18:50,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 21:18:50,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 179 transitions. [2024-06-21 21:18:50,382 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5849673202614379 [2024-06-21 21:18:50,382 INFO L175 Difference]: Start difference. First operand has 61 places, 63 transitions, 308 flow. Second operand 6 states and 179 transitions. [2024-06-21 21:18:50,383 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 110 transitions, 680 flow [2024-06-21 21:18:50,390 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 110 transitions, 668 flow, removed 6 selfloop flow, removed 0 redundant places. [2024-06-21 21:18:50,392 INFO L231 Difference]: Finished difference. Result has 66 places, 66 transitions, 385 flow [2024-06-21 21:18:50,392 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=288, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=385, PETRI_PLACES=66, PETRI_TRANSITIONS=66} [2024-06-21 21:18:50,393 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 12 predicate places. [2024-06-21 21:18:50,393 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 66 transitions, 385 flow [2024-06-21 21:18:50,393 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.166666666666666) internal successors, (85), 6 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:18:50,394 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:18:50,394 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:18:50,394 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-21 21:18:50,394 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)] === [2024-06-21 21:18:50,394 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:18:50,394 INFO L85 PathProgramCache]: Analyzing trace with hash -697143758, now seen corresponding path program 1 times [2024-06-21 21:18:50,395 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:18:50,395 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1537998709] [2024-06-21 21:18:50,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:18:50,395 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:18:50,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:18:50,922 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:18:50,922 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:18:50,922 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1537998709] [2024-06-21 21:18:50,922 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1537998709] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:18:50,923 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:18:50,923 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 21:18:50,923 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1887786018] [2024-06-21 21:18:50,923 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:18:50,923 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 21:18:50,924 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:18:50,924 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 21:18:50,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-21 21:18:50,993 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 51 [2024-06-21 21:18:50,993 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 66 transitions, 385 flow. Second operand has 6 states, 6 states have (on average 13.5) internal successors, (81), 6 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:18:50,993 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:18:50,993 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 51 [2024-06-21 21:18:50,993 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:18:52,026 INFO L124 PetriNetUnfolderBase]: 8180/11488 cut-off events. [2024-06-21 21:18:52,027 INFO L125 PetriNetUnfolderBase]: For 22164/22164 co-relation queries the response was YES. [2024-06-21 21:18:52,047 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37134 conditions, 11488 events. 8180/11488 cut-off events. For 22164/22164 co-relation queries the response was YES. Maximal size of possible extension queue 437. Compared 63023 event pairs, 4129 based on Foata normal form. 3/11489 useless extension candidates. Maximal degree in co-relation 37113. Up to 11135 conditions per place. [2024-06-21 21:18:52,087 INFO L140 encePairwiseOnDemand]: 41/51 looper letters, 66 selfloop transitions, 10 changer transitions 0/83 dead transitions. [2024-06-21 21:18:52,088 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 83 transitions, 581 flow [2024-06-21 21:18:52,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 21:18:52,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 21:18:52,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 121 transitions. [2024-06-21 21:18:52,089 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4745098039215686 [2024-06-21 21:18:52,089 INFO L175 Difference]: Start difference. First operand has 66 places, 66 transitions, 385 flow. Second operand 5 states and 121 transitions. [2024-06-21 21:18:52,089 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 83 transitions, 581 flow [2024-06-21 21:18:52,095 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 83 transitions, 512 flow, removed 12 selfloop flow, removed 4 redundant places. [2024-06-21 21:18:52,096 INFO L231 Difference]: Finished difference. Result has 67 places, 66 transitions, 347 flow [2024-06-21 21:18:52,096 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=316, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=347, PETRI_PLACES=67, PETRI_TRANSITIONS=66} [2024-06-21 21:18:52,096 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 13 predicate places. [2024-06-21 21:18:52,097 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 66 transitions, 347 flow [2024-06-21 21:18:52,097 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.5) internal successors, (81), 6 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:18:52,097 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:18:52,097 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:18:52,097 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-21 21:18:52,097 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)] === [2024-06-21 21:18:52,098 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:18:52,098 INFO L85 PathProgramCache]: Analyzing trace with hash -159711428, now seen corresponding path program 1 times [2024-06-21 21:18:52,098 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:18:52,098 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1972575581] [2024-06-21 21:18:52,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:18:52,098 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:18:52,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:18:52,654 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:18:52,654 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:18:52,654 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1972575581] [2024-06-21 21:18:52,655 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1972575581] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:18:52,655 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:18:52,655 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 21:18:52,655 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [217608359] [2024-06-21 21:18:52,655 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:18:52,655 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 21:18:52,656 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:18:52,656 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 21:18:52,656 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-21 21:18:52,748 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 51 [2024-06-21 21:18:52,748 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 66 transitions, 347 flow. Second operand has 7 states, 7 states have (on average 13.428571428571429) internal successors, (94), 7 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:18:52,749 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:18:52,749 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 51 [2024-06-21 21:18:52,749 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:18:53,848 INFO L124 PetriNetUnfolderBase]: 8192/11545 cut-off events. [2024-06-21 21:18:53,849 INFO L125 PetriNetUnfolderBase]: For 25442/25442 co-relation queries the response was YES. [2024-06-21 21:18:53,865 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37773 conditions, 11545 events. 8192/11545 cut-off events. For 25442/25442 co-relation queries the response was YES. Maximal size of possible extension queue 441. Compared 63333 event pairs, 3950 based on Foata normal form. 5/11544 useless extension candidates. Maximal degree in co-relation 37750. Up to 11085 conditions per place. [2024-06-21 21:18:53,900 INFO L140 encePairwiseOnDemand]: 39/51 looper letters, 79 selfloop transitions, 22 changer transitions 0/108 dead transitions. [2024-06-21 21:18:53,901 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 108 transitions, 743 flow [2024-06-21 21:18:53,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 21:18:53,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 21:18:53,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 152 transitions. [2024-06-21 21:18:53,902 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49673202614379086 [2024-06-21 21:18:53,902 INFO L175 Difference]: Start difference. First operand has 67 places, 66 transitions, 347 flow. Second operand 6 states and 152 transitions. [2024-06-21 21:18:53,902 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 108 transitions, 743 flow [2024-06-21 21:18:53,910 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 108 transitions, 714 flow, removed 3 selfloop flow, removed 4 redundant places. [2024-06-21 21:18:53,912 INFO L231 Difference]: Finished difference. Result has 71 places, 80 transitions, 492 flow [2024-06-21 21:18:53,912 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=318, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=492, PETRI_PLACES=71, PETRI_TRANSITIONS=80} [2024-06-21 21:18:53,912 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 17 predicate places. [2024-06-21 21:18:53,912 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 80 transitions, 492 flow [2024-06-21 21:18:53,913 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.428571428571429) internal successors, (94), 7 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:18:53,913 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:18:53,913 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:18:53,913 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-21 21:18:53,913 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)] === [2024-06-21 21:18:53,913 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:18:53,914 INFO L85 PathProgramCache]: Analyzing trace with hash 483442845, now seen corresponding path program 1 times [2024-06-21 21:18:53,914 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:18:53,914 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1307856630] [2024-06-21 21:18:53,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:18:53,914 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:18:53,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:18:54,502 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:18:54,502 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:18:54,502 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1307856630] [2024-06-21 21:18:54,504 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1307856630] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:18:54,504 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:18:54,504 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 21:18:54,504 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [408775255] [2024-06-21 21:18:54,504 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:18:54,504 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 21:18:54,505 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:18:54,505 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 21:18:54,505 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-21 21:18:54,557 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 51 [2024-06-21 21:18:54,558 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 80 transitions, 492 flow. Second operand has 7 states, 7 states have (on average 12.428571428571429) internal successors, (87), 7 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:18:54,558 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:18:54,558 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 51 [2024-06-21 21:18:54,558 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:18:55,804 INFO L124 PetriNetUnfolderBase]: 9600/13120 cut-off events. [2024-06-21 21:18:55,804 INFO L125 PetriNetUnfolderBase]: For 45763/45773 co-relation queries the response was YES. [2024-06-21 21:18:55,825 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48573 conditions, 13120 events. 9600/13120 cut-off events. For 45763/45773 co-relation queries the response was YES. Maximal size of possible extension queue 486. Compared 68824 event pairs, 4758 based on Foata normal form. 14/13131 useless extension candidates. Maximal degree in co-relation 48548. Up to 12898 conditions per place. [2024-06-21 21:18:55,872 INFO L140 encePairwiseOnDemand]: 39/51 looper letters, 83 selfloop transitions, 25 changer transitions 0/114 dead transitions. [2024-06-21 21:18:55,872 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 114 transitions, 851 flow [2024-06-21 21:18:55,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 21:18:55,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 21:18:55,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 149 transitions. [2024-06-21 21:18:55,874 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4869281045751634 [2024-06-21 21:18:55,874 INFO L175 Difference]: Start difference. First operand has 71 places, 80 transitions, 492 flow. Second operand 6 states and 149 transitions. [2024-06-21 21:18:55,874 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 114 transitions, 851 flow [2024-06-21 21:18:55,895 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 114 transitions, 827 flow, removed 11 selfloop flow, removed 1 redundant places. [2024-06-21 21:18:55,896 INFO L231 Difference]: Finished difference. Result has 76 places, 84 transitions, 564 flow [2024-06-21 21:18:55,896 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=468, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=564, PETRI_PLACES=76, PETRI_TRANSITIONS=84} [2024-06-21 21:18:55,898 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 22 predicate places. [2024-06-21 21:18:55,898 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 84 transitions, 564 flow [2024-06-21 21:18:55,899 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.428571428571429) internal successors, (87), 7 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:18:55,899 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:18:55,899 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:18:55,899 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-21 21:18:55,899 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)] === [2024-06-21 21:18:55,900 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:18:55,900 INFO L85 PathProgramCache]: Analyzing trace with hash 59784273, now seen corresponding path program 2 times [2024-06-21 21:18:55,900 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:18:55,900 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [186018782] [2024-06-21 21:18:55,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:18:55,900 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:18:55,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:18:56,535 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:18:56,535 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:18:56,536 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [186018782] [2024-06-21 21:18:56,536 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [186018782] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:18:56,536 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:18:56,536 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 21:18:56,536 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [114008168] [2024-06-21 21:18:56,536 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:18:56,537 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 21:18:56,537 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:18:56,537 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 21:18:56,537 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-21 21:18:56,602 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 51 [2024-06-21 21:18:56,602 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 84 transitions, 564 flow. Second operand has 7 states, 7 states have (on average 12.428571428571429) internal successors, (87), 7 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:18:56,602 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:18:56,602 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 51 [2024-06-21 21:18:56,602 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:18:57,979 INFO L124 PetriNetUnfolderBase]: 9576/13072 cut-off events. [2024-06-21 21:18:57,979 INFO L125 PetriNetUnfolderBase]: For 51024/51024 co-relation queries the response was YES. [2024-06-21 21:18:58,014 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48986 conditions, 13072 events. 9576/13072 cut-off events. For 51024/51024 co-relation queries the response was YES. Maximal size of possible extension queue 486. Compared 68447 event pairs, 4778 based on Foata normal form. 3/13067 useless extension candidates. Maximal degree in co-relation 48958. Up to 12868 conditions per place. [2024-06-21 21:18:58,073 INFO L140 encePairwiseOnDemand]: 39/51 looper letters, 76 selfloop transitions, 26 changer transitions 0/108 dead transitions. [2024-06-21 21:18:58,073 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 108 transitions, 830 flow [2024-06-21 21:18:58,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 21:18:58,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 21:18:58,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 144 transitions. [2024-06-21 21:18:58,075 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47058823529411764 [2024-06-21 21:18:58,075 INFO L175 Difference]: Start difference. First operand has 76 places, 84 transitions, 564 flow. Second operand 6 states and 144 transitions. [2024-06-21 21:18:58,075 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 108 transitions, 830 flow [2024-06-21 21:18:58,105 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 108 transitions, 787 flow, removed 7 selfloop flow, removed 3 redundant places. [2024-06-21 21:18:58,107 INFO L231 Difference]: Finished difference. Result has 79 places, 84 transitions, 584 flow [2024-06-21 21:18:58,107 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=521, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=584, PETRI_PLACES=79, PETRI_TRANSITIONS=84} [2024-06-21 21:18:58,107 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 25 predicate places. [2024-06-21 21:18:58,108 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 84 transitions, 584 flow [2024-06-21 21:18:58,108 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.428571428571429) internal successors, (87), 7 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:18:58,108 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:18:58,108 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:18:58,108 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-21 21:18:58,108 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)] === [2024-06-21 21:18:58,109 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:18:58,109 INFO L85 PathProgramCache]: Analyzing trace with hash 1461043215, now seen corresponding path program 1 times [2024-06-21 21:18:58,109 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:18:58,109 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1051725767] [2024-06-21 21:18:58,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:18:58,109 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:18:58,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:18:58,774 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:18:58,774 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:18:58,774 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1051725767] [2024-06-21 21:18:58,775 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1051725767] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:18:58,775 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:18:58,775 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 21:18:58,775 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1410371763] [2024-06-21 21:18:58,775 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:18:58,775 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 21:18:58,776 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:18:58,776 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 21:18:58,776 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2024-06-21 21:18:58,865 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 51 [2024-06-21 21:18:58,865 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 84 transitions, 584 flow. Second operand has 8 states, 8 states have (on average 12.375) internal successors, (99), 8 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:18:58,865 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:18:58,865 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 51 [2024-06-21 21:18:58,866 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:19:00,387 INFO L124 PetriNetUnfolderBase]: 10114/13851 cut-off events. [2024-06-21 21:19:00,387 INFO L125 PetriNetUnfolderBase]: For 65313/65321 co-relation queries the response was YES. [2024-06-21 21:19:00,425 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53367 conditions, 13851 events. 10114/13851 cut-off events. For 65313/65321 co-relation queries the response was YES. Maximal size of possible extension queue 486. Compared 74157 event pairs, 4210 based on Foata normal form. 13/13860 useless extension candidates. Maximal degree in co-relation 53338. Up to 12889 conditions per place. [2024-06-21 21:19:00,488 INFO L140 encePairwiseOnDemand]: 34/51 looper letters, 122 selfloop transitions, 59 changer transitions 0/187 dead transitions. [2024-06-21 21:19:00,489 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 187 transitions, 1660 flow [2024-06-21 21:19:00,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:19:00,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:19:00,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 213 transitions. [2024-06-21 21:19:00,490 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5220588235294118 [2024-06-21 21:19:00,490 INFO L175 Difference]: Start difference. First operand has 79 places, 84 transitions, 584 flow. Second operand 8 states and 213 transitions. [2024-06-21 21:19:00,491 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 187 transitions, 1660 flow [2024-06-21 21:19:00,530 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 187 transitions, 1497 flow, removed 8 selfloop flow, removed 6 redundant places. [2024-06-21 21:19:00,532 INFO L231 Difference]: Finished difference. Result has 84 places, 120 transitions, 935 flow [2024-06-21 21:19:00,532 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=500, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=935, PETRI_PLACES=84, PETRI_TRANSITIONS=120} [2024-06-21 21:19:00,533 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 30 predicate places. [2024-06-21 21:19:00,533 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 120 transitions, 935 flow [2024-06-21 21:19:00,533 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.375) internal successors, (99), 8 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:19:00,533 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:19:00,533 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:19:00,534 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-21 21:19:00,534 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)] === [2024-06-21 21:19:00,534 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:19:00,534 INFO L85 PathProgramCache]: Analyzing trace with hash 958809213, now seen corresponding path program 2 times [2024-06-21 21:19:00,534 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:19:00,534 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1782330405] [2024-06-21 21:19:00,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:19:00,535 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:19:00,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:19:01,219 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:19:01,219 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:19:01,219 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1782330405] [2024-06-21 21:19:01,220 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1782330405] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:19:01,220 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:19:01,220 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 21:19:01,220 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1271084311] [2024-06-21 21:19:01,220 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:19:01,220 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 21:19:01,221 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:19:01,221 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 21:19:01,221 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-21 21:19:01,287 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 51 [2024-06-21 21:19:01,288 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 120 transitions, 935 flow. Second operand has 8 states, 8 states have (on average 12.375) internal successors, (99), 8 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:19:01,288 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:19:01,288 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 51 [2024-06-21 21:19:01,288 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:19:02,755 INFO L124 PetriNetUnfolderBase]: 10462/14372 cut-off events. [2024-06-21 21:19:02,755 INFO L125 PetriNetUnfolderBase]: For 93880/93894 co-relation queries the response was YES. [2024-06-21 21:19:02,812 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63519 conditions, 14372 events. 10462/14372 cut-off events. For 93880/93894 co-relation queries the response was YES. Maximal size of possible extension queue 486. Compared 77183 event pairs, 4347 based on Foata normal form. 25/14393 useless extension candidates. Maximal degree in co-relation 63486. Up to 13157 conditions per place. [2024-06-21 21:19:02,879 INFO L140 encePairwiseOnDemand]: 37/51 looper letters, 101 selfloop transitions, 81 changer transitions 0/188 dead transitions. [2024-06-21 21:19:02,879 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 188 transitions, 1803 flow [2024-06-21 21:19:02,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 21:19:02,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 21:19:02,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 183 transitions. [2024-06-21 21:19:02,881 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5126050420168067 [2024-06-21 21:19:02,881 INFO L175 Difference]: Start difference. First operand has 84 places, 120 transitions, 935 flow. Second operand 7 states and 183 transitions. [2024-06-21 21:19:02,881 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 188 transitions, 1803 flow [2024-06-21 21:19:02,967 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 188 transitions, 1709 flow, removed 38 selfloop flow, removed 2 redundant places. [2024-06-21 21:19:02,970 INFO L231 Difference]: Finished difference. Result has 91 places, 141 transitions, 1308 flow [2024-06-21 21:19:02,970 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=865, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=120, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1308, PETRI_PLACES=91, PETRI_TRANSITIONS=141} [2024-06-21 21:19:02,971 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 37 predicate places. [2024-06-21 21:19:02,971 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 141 transitions, 1308 flow [2024-06-21 21:19:02,971 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.375) internal successors, (99), 8 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:19:02,971 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:19:02,971 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:19:02,971 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-21 21:19:02,972 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)] === [2024-06-21 21:19:02,972 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:19:02,972 INFO L85 PathProgramCache]: Analyzing trace with hash -1472620209, now seen corresponding path program 3 times [2024-06-21 21:19:02,972 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:19:02,972 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2049843793] [2024-06-21 21:19:02,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:19:02,972 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:19:02,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:19:03,744 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:19:03,744 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:19:03,744 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2049843793] [2024-06-21 21:19:03,744 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2049843793] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:19:03,745 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:19:03,745 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 21:19:03,745 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1389120110] [2024-06-21 21:19:03,745 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:19:03,745 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 21:19:03,745 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:19:03,745 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 21:19:03,745 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-21 21:19:03,833 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 51 [2024-06-21 21:19:03,833 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 141 transitions, 1308 flow. Second operand has 8 states, 8 states have (on average 12.375) internal successors, (99), 8 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:19:03,833 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:19:03,833 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 51 [2024-06-21 21:19:03,833 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:19:05,325 INFO L124 PetriNetUnfolderBase]: 10544/14484 cut-off events. [2024-06-21 21:19:05,325 INFO L125 PetriNetUnfolderBase]: For 123345/123351 co-relation queries the response was YES. [2024-06-21 21:19:05,370 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69990 conditions, 14484 events. 10544/14484 cut-off events. For 123345/123351 co-relation queries the response was YES. Maximal size of possible extension queue 486. Compared 77625 event pairs, 4361 based on Foata normal form. 13/14484 useless extension candidates. Maximal degree in co-relation 69953. Up to 13209 conditions per place. [2024-06-21 21:19:05,431 INFO L140 encePairwiseOnDemand]: 37/51 looper letters, 105 selfloop transitions, 93 changer transitions 0/204 dead transitions. [2024-06-21 21:19:05,432 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 204 transitions, 2248 flow [2024-06-21 21:19:05,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 21:19:05,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 21:19:05,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 181 transitions. [2024-06-21 21:19:05,433 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5070028011204482 [2024-06-21 21:19:05,433 INFO L175 Difference]: Start difference. First operand has 91 places, 141 transitions, 1308 flow. Second operand 7 states and 181 transitions. [2024-06-21 21:19:05,434 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 204 transitions, 2248 flow [2024-06-21 21:19:05,539 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 204 transitions, 2121 flow, removed 20 selfloop flow, removed 3 redundant places. [2024-06-21 21:19:05,542 INFO L231 Difference]: Finished difference. Result has 96 places, 157 transitions, 1591 flow [2024-06-21 21:19:05,542 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=1193, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=141, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=77, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1591, PETRI_PLACES=96, PETRI_TRANSITIONS=157} [2024-06-21 21:19:05,542 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 42 predicate places. [2024-06-21 21:19:05,542 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 157 transitions, 1591 flow [2024-06-21 21:19:05,543 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.375) internal successors, (99), 8 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:19:05,543 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:19:05,543 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:19:05,543 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-21 21:19:05,543 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)] === [2024-06-21 21:19:05,543 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:19:05,544 INFO L85 PathProgramCache]: Analyzing trace with hash -1516238939, now seen corresponding path program 4 times [2024-06-21 21:19:05,544 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:19:05,544 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [15182747] [2024-06-21 21:19:05,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:19:05,544 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:19:05,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:19:06,193 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:19:06,193 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:19:06,193 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [15182747] [2024-06-21 21:19:06,193 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [15182747] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:19:06,193 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:19:06,193 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 21:19:06,193 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [576238260] [2024-06-21 21:19:06,193 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:19:06,193 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 21:19:06,194 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:19:06,194 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 21:19:06,194 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-21 21:19:06,279 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 51 [2024-06-21 21:19:06,280 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 157 transitions, 1591 flow. Second operand has 8 states, 8 states have (on average 12.375) internal successors, (99), 8 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:19:06,280 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:19:06,280 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 51 [2024-06-21 21:19:06,280 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:19:07,841 INFO L124 PetriNetUnfolderBase]: 10559/14515 cut-off events. [2024-06-21 21:19:07,841 INFO L125 PetriNetUnfolderBase]: For 152869/152885 co-relation queries the response was YES. [2024-06-21 21:19:07,889 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73888 conditions, 14515 events. 10559/14515 cut-off events. For 152869/152885 co-relation queries the response was YES. Maximal size of possible extension queue 486. Compared 78105 event pairs, 4341 based on Foata normal form. 22/14524 useless extension candidates. Maximal degree in co-relation 73849. Up to 13227 conditions per place. [2024-06-21 21:19:07,952 INFO L140 encePairwiseOnDemand]: 37/51 looper letters, 95 selfloop transitions, 108 changer transitions 0/209 dead transitions. [2024-06-21 21:19:07,952 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 209 transitions, 2408 flow [2024-06-21 21:19:07,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 21:19:07,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 21:19:07,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 179 transitions. [2024-06-21 21:19:07,954 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5014005602240896 [2024-06-21 21:19:07,954 INFO L175 Difference]: Start difference. First operand has 96 places, 157 transitions, 1591 flow. Second operand 7 states and 179 transitions. [2024-06-21 21:19:07,954 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 209 transitions, 2408 flow [2024-06-21 21:19:08,082 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 209 transitions, 2213 flow, removed 32 selfloop flow, removed 3 redundant places. [2024-06-21 21:19:08,085 INFO L231 Difference]: Finished difference. Result has 100 places, 165 transitions, 1744 flow [2024-06-21 21:19:08,085 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=1410, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=157, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=100, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1744, PETRI_PLACES=100, PETRI_TRANSITIONS=165} [2024-06-21 21:19:08,086 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 46 predicate places. [2024-06-21 21:19:08,086 INFO L495 AbstractCegarLoop]: Abstraction has has 100 places, 165 transitions, 1744 flow [2024-06-21 21:19:08,086 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.375) internal successors, (99), 8 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:19:08,086 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:19:08,086 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:19:08,086 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-21 21:19:08,087 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)] === [2024-06-21 21:19:08,087 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:19:08,087 INFO L85 PathProgramCache]: Analyzing trace with hash 1136186811, now seen corresponding path program 1 times [2024-06-21 21:19:08,087 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:19:08,087 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1858052439] [2024-06-21 21:19:08,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:19:08,087 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:19:08,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:19:08,779 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:19:08,779 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:19:08,779 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1858052439] [2024-06-21 21:19:08,779 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1858052439] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:19:08,779 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:19:08,779 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 21:19:08,779 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [884445374] [2024-06-21 21:19:08,779 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:19:08,780 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 21:19:08,780 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:19:08,780 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 21:19:08,780 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-21 21:19:08,855 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 51 [2024-06-21 21:19:08,855 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 165 transitions, 1744 flow. Second operand has 8 states, 8 states have (on average 13.375) internal successors, (107), 8 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:19:08,855 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:19:08,855 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 51 [2024-06-21 21:19:08,855 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:19:10,213 INFO L124 PetriNetUnfolderBase]: 9184/12878 cut-off events. [2024-06-21 21:19:10,213 INFO L125 PetriNetUnfolderBase]: For 137708/137712 co-relation queries the response was YES. [2024-06-21 21:19:10,257 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65871 conditions, 12878 events. 9184/12878 cut-off events. For 137708/137712 co-relation queries the response was YES. Maximal size of possible extension queue 433. Compared 70572 event pairs, 3611 based on Foata normal form. 12/12888 useless extension candidates. Maximal degree in co-relation 65830. Up to 12350 conditions per place. [2024-06-21 21:19:10,315 INFO L140 encePairwiseOnDemand]: 39/51 looper letters, 172 selfloop transitions, 26 changer transitions 0/205 dead transitions. [2024-06-21 21:19:10,315 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 205 transitions, 2390 flow [2024-06-21 21:19:10,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 21:19:10,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 21:19:10,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 176 transitions. [2024-06-21 21:19:10,316 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49299719887955185 [2024-06-21 21:19:10,317 INFO L175 Difference]: Start difference. First operand has 100 places, 165 transitions, 1744 flow. Second operand 7 states and 176 transitions. [2024-06-21 21:19:10,317 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 205 transitions, 2390 flow [2024-06-21 21:19:10,451 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 205 transitions, 2200 flow, removed 20 selfloop flow, removed 4 redundant places. [2024-06-21 21:19:10,454 INFO L231 Difference]: Finished difference. Result has 103 places, 169 transitions, 1671 flow [2024-06-21 21:19:10,454 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=1554, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=165, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=139, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1671, PETRI_PLACES=103, PETRI_TRANSITIONS=169} [2024-06-21 21:19:10,454 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 49 predicate places. [2024-06-21 21:19:10,454 INFO L495 AbstractCegarLoop]: Abstraction has has 103 places, 169 transitions, 1671 flow [2024-06-21 21:19:10,455 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.375) internal successors, (107), 8 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:19:10,455 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:19:10,455 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:19:10,455 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-21 21:19:10,455 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 21:19:10,455 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:19:10,456 INFO L85 PathProgramCache]: Analyzing trace with hash 265428354, now seen corresponding path program 1 times [2024-06-21 21:19:10,456 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:19:10,456 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [189319763] [2024-06-21 21:19:10,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:19:10,456 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:19:10,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:19:10,923 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:19:10,923 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:19:10,923 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [189319763] [2024-06-21 21:19:10,924 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [189319763] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:19:10,924 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:19:10,924 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 21:19:10,924 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [458288069] [2024-06-21 21:19:10,924 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:19:10,924 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 21:19:10,924 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:19:10,924 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 21:19:10,925 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-21 21:19:11,006 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 51 [2024-06-21 21:19:11,006 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 169 transitions, 1671 flow. Second operand has 6 states, 6 states have (on average 14.0) internal successors, (84), 6 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:19:11,006 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:19:11,006 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 51 [2024-06-21 21:19:11,006 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:19:12,213 INFO L124 PetriNetUnfolderBase]: 9177/12865 cut-off events. [2024-06-21 21:19:12,213 INFO L125 PetriNetUnfolderBase]: For 150643/150645 co-relation queries the response was YES. [2024-06-21 21:19:12,258 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67264 conditions, 12865 events. 9177/12865 cut-off events. For 150643/150645 co-relation queries the response was YES. Maximal size of possible extension queue 433. Compared 70457 event pairs, 3745 based on Foata normal form. 2/12865 useless extension candidates. Maximal degree in co-relation 67222. Up to 12465 conditions per place. [2024-06-21 21:19:12,316 INFO L140 encePairwiseOnDemand]: 42/51 looper letters, 166 selfloop transitions, 10 changer transitions 0/183 dead transitions. [2024-06-21 21:19:12,317 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 183 transitions, 2067 flow [2024-06-21 21:19:12,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 21:19:12,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 21:19:12,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 117 transitions. [2024-06-21 21:19:12,318 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4588235294117647 [2024-06-21 21:19:12,318 INFO L175 Difference]: Start difference. First operand has 103 places, 169 transitions, 1671 flow. Second operand 5 states and 117 transitions. [2024-06-21 21:19:12,318 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 183 transitions, 2067 flow [2024-06-21 21:19:12,458 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 183 transitions, 1972 flow, removed 24 selfloop flow, removed 5 redundant places. [2024-06-21 21:19:12,461 INFO L231 Difference]: Finished difference. Result has 103 places, 169 transitions, 1605 flow [2024-06-21 21:19:12,461 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=1576, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=169, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=159, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1605, PETRI_PLACES=103, PETRI_TRANSITIONS=169} [2024-06-21 21:19:12,462 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 49 predicate places. [2024-06-21 21:19:12,462 INFO L495 AbstractCegarLoop]: Abstraction has has 103 places, 169 transitions, 1605 flow [2024-06-21 21:19:12,462 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.0) internal successors, (84), 6 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:19:12,462 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:19:12,463 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:19:12,463 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-21 21:19:12,463 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 21:19:12,463 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:19:12,463 INFO L85 PathProgramCache]: Analyzing trace with hash 562953669, now seen corresponding path program 1 times [2024-06-21 21:19:12,463 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:19:12,463 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [530335871] [2024-06-21 21:19:12,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:19:12,464 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:19:12,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:19:13,090 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:19:13,090 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:19:13,090 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [530335871] [2024-06-21 21:19:13,090 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [530335871] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:19:13,090 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:19:13,091 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 21:19:13,091 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [624639181] [2024-06-21 21:19:13,091 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:19:13,091 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 21:19:13,091 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:19:13,091 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 21:19:13,091 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-21 21:19:13,153 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 51 [2024-06-21 21:19:13,153 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 169 transitions, 1605 flow. Second operand has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:19:13,153 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:19:13,153 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 51 [2024-06-21 21:19:13,153 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:19:14,774 INFO L124 PetriNetUnfolderBase]: 10760/14859 cut-off events. [2024-06-21 21:19:14,775 INFO L125 PetriNetUnfolderBase]: For 193986/194018 co-relation queries the response was YES. [2024-06-21 21:19:14,832 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78370 conditions, 14859 events. 10760/14859 cut-off events. For 193986/194018 co-relation queries the response was YES. Maximal size of possible extension queue 486. Compared 80811 event pairs, 4411 based on Foata normal form. 35/14890 useless extension candidates. Maximal degree in co-relation 78327. Up to 13428 conditions per place. [2024-06-21 21:19:14,902 INFO L140 encePairwiseOnDemand]: 38/51 looper letters, 116 selfloop transitions, 113 changer transitions 0/235 dead transitions. [2024-06-21 21:19:14,902 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 235 transitions, 2689 flow [2024-06-21 21:19:14,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 21:19:14,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 21:19:14,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 182 transitions. [2024-06-21 21:19:14,904 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5098039215686274 [2024-06-21 21:19:14,904 INFO L175 Difference]: Start difference. First operand has 103 places, 169 transitions, 1605 flow. Second operand 7 states and 182 transitions. [2024-06-21 21:19:14,904 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 235 transitions, 2689 flow [2024-06-21 21:19:15,059 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 235 transitions, 2656 flow, removed 5 selfloop flow, removed 4 redundant places. [2024-06-21 21:19:15,062 INFO L231 Difference]: Finished difference. Result has 108 places, 188 transitions, 2151 flow [2024-06-21 21:19:15,062 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=1572, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=169, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=94, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2151, PETRI_PLACES=108, PETRI_TRANSITIONS=188} [2024-06-21 21:19:15,062 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 54 predicate places. [2024-06-21 21:19:15,062 INFO L495 AbstractCegarLoop]: Abstraction has has 108 places, 188 transitions, 2151 flow [2024-06-21 21:19:15,063 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:19:15,063 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:19:15,063 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:19:15,063 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-21 21:19:15,063 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)] === [2024-06-21 21:19:15,063 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:19:15,063 INFO L85 PathProgramCache]: Analyzing trace with hash 562948089, now seen corresponding path program 2 times [2024-06-21 21:19:15,063 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:19:15,064 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [677900771] [2024-06-21 21:19:15,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:19:15,064 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:19:15,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:19:15,681 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:19:15,682 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:19:15,682 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [677900771] [2024-06-21 21:19:15,682 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [677900771] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:19:15,682 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:19:15,682 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 21:19:15,682 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [196257597] [2024-06-21 21:19:15,682 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:19:15,682 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 21:19:15,682 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:19:15,683 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 21:19:15,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-21 21:19:15,785 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 51 [2024-06-21 21:19:15,786 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 188 transitions, 2151 flow. Second operand has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:19:15,786 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:19:15,786 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 51 [2024-06-21 21:19:15,786 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:19:17,378 INFO L124 PetriNetUnfolderBase]: 10738/14822 cut-off events. [2024-06-21 21:19:17,378 INFO L125 PetriNetUnfolderBase]: For 224831/224855 co-relation queries the response was YES. [2024-06-21 21:19:17,442 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83307 conditions, 14822 events. 10738/14822 cut-off events. For 224831/224855 co-relation queries the response was YES. Maximal size of possible extension queue 486. Compared 80215 event pairs, 4423 based on Foata normal form. 29/14847 useless extension candidates. Maximal degree in co-relation 83262. Up to 13414 conditions per place. [2024-06-21 21:19:17,511 INFO L140 encePairwiseOnDemand]: 37/51 looper letters, 117 selfloop transitions, 120 changer transitions 0/243 dead transitions. [2024-06-21 21:19:17,512 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 114 places, 243 transitions, 3127 flow [2024-06-21 21:19:17,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 21:19:17,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 21:19:17,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 185 transitions. [2024-06-21 21:19:17,513 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5182072829131653 [2024-06-21 21:19:17,514 INFO L175 Difference]: Start difference. First operand has 108 places, 188 transitions, 2151 flow. Second operand 7 states and 185 transitions. [2024-06-21 21:19:17,514 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 114 places, 243 transitions, 3127 flow [2024-06-21 21:19:17,871 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 243 transitions, 2938 flow, removed 38 selfloop flow, removed 3 redundant places. [2024-06-21 21:19:17,874 INFO L231 Difference]: Finished difference. Result has 114 places, 195 transitions, 2455 flow [2024-06-21 21:19:17,875 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=1966, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=188, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=113, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2455, PETRI_PLACES=114, PETRI_TRANSITIONS=195} [2024-06-21 21:19:17,876 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 60 predicate places. [2024-06-21 21:19:17,876 INFO L495 AbstractCegarLoop]: Abstraction has has 114 places, 195 transitions, 2455 flow [2024-06-21 21:19:17,876 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:19:17,876 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:19:17,885 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:19:17,885 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-21 21:19:17,886 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)] === [2024-06-21 21:19:17,887 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:19:17,887 INFO L85 PathProgramCache]: Analyzing trace with hash 1625508409, now seen corresponding path program 3 times [2024-06-21 21:19:17,887 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:19:17,887 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [437962640] [2024-06-21 21:19:17,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:19:17,887 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:19:17,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:19:18,617 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:19:18,617 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:19:18,617 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [437962640] [2024-06-21 21:19:18,618 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [437962640] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:19:18,618 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:19:18,618 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 21:19:18,618 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1321659139] [2024-06-21 21:19:18,618 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:19:18,619 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 21:19:18,619 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:19:18,619 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 21:19:18,619 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-21 21:19:18,688 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 51 [2024-06-21 21:19:18,688 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 195 transitions, 2455 flow. Second operand has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:19:18,688 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:19:18,688 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 51 [2024-06-21 21:19:18,689 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:19:20,433 INFO L124 PetriNetUnfolderBase]: 10753/14868 cut-off events. [2024-06-21 21:19:20,434 INFO L125 PetriNetUnfolderBase]: For 252838/252900 co-relation queries the response was YES. [2024-06-21 21:19:20,512 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86452 conditions, 14868 events. 10753/14868 cut-off events. For 252838/252900 co-relation queries the response was YES. Maximal size of possible extension queue 486. Compared 80824 event pairs, 4458 based on Foata normal form. 66/14919 useless extension candidates. Maximal degree in co-relation 86404. Up to 13437 conditions per place. [2024-06-21 21:19:20,582 INFO L140 encePairwiseOnDemand]: 38/51 looper letters, 111 selfloop transitions, 124 changer transitions 0/241 dead transitions. [2024-06-21 21:19:20,582 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 241 transitions, 3269 flow [2024-06-21 21:19:20,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 21:19:20,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 21:19:20,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 173 transitions. [2024-06-21 21:19:20,584 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.484593837535014 [2024-06-21 21:19:20,585 INFO L175 Difference]: Start difference. First operand has 114 places, 195 transitions, 2455 flow. Second operand 7 states and 173 transitions. [2024-06-21 21:19:20,585 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 241 transitions, 3269 flow [2024-06-21 21:19:21,014 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 241 transitions, 3095 flow, removed 6 selfloop flow, removed 4 redundant places. [2024-06-21 21:19:21,017 INFO L231 Difference]: Finished difference. Result has 117 places, 204 transitions, 2697 flow [2024-06-21 21:19:21,017 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=2289, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=195, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=115, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2697, PETRI_PLACES=117, PETRI_TRANSITIONS=204} [2024-06-21 21:19:21,017 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 63 predicate places. [2024-06-21 21:19:21,018 INFO L495 AbstractCegarLoop]: Abstraction has has 117 places, 204 transitions, 2697 flow [2024-06-21 21:19:21,018 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:19:21,018 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:19:21,018 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:19:21,018 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-21 21:19:21,018 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 21:19:21,019 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:19:21,019 INFO L85 PathProgramCache]: Analyzing trace with hash -361653562, now seen corresponding path program 1 times [2024-06-21 21:19:21,019 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:19:21,019 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1290016247] [2024-06-21 21:19:21,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:19:21,019 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:19:21,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:19:21,602 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:19:21,603 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:19:21,603 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1290016247] [2024-06-21 21:19:21,603 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1290016247] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:19:21,603 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:19:21,603 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 21:19:21,603 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1517189872] [2024-06-21 21:19:21,603 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:19:21,603 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 21:19:21,603 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:19:21,604 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 21:19:21,604 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-21 21:19:21,682 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 51 [2024-06-21 21:19:21,682 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 117 places, 204 transitions, 2697 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) [2024-06-21 21:19:21,682 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:19:21,682 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 51 [2024-06-21 21:19:21,682 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:19:23,129 INFO L124 PetriNetUnfolderBase]: 9344/13406 cut-off events. [2024-06-21 21:19:23,130 INFO L125 PetriNetUnfolderBase]: For 231142/231144 co-relation queries the response was YES. [2024-06-21 21:19:23,184 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77887 conditions, 13406 events. 9344/13406 cut-off events. For 231142/231144 co-relation queries the response was YES. Maximal size of possible extension queue 451. Compared 75671 event pairs, 3735 based on Foata normal form. 4/13408 useless extension candidates. Maximal degree in co-relation 77838. Up to 12672 conditions per place. [2024-06-21 21:19:23,247 INFO L140 encePairwiseOnDemand]: 41/51 looper letters, 206 selfloop transitions, 14 changer transitions 0/227 dead transitions. [2024-06-21 21:19:23,247 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 122 places, 227 transitions, 3237 flow [2024-06-21 21:19:23,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 21:19:23,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 21:19:23,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 138 transitions. [2024-06-21 21:19:23,248 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45098039215686275 [2024-06-21 21:19:23,248 INFO L175 Difference]: Start difference. First operand has 117 places, 204 transitions, 2697 flow. Second operand 6 states and 138 transitions. [2024-06-21 21:19:23,248 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 122 places, 227 transitions, 3237 flow [2024-06-21 21:19:23,520 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 118 places, 227 transitions, 3025 flow, removed 22 selfloop flow, removed 4 redundant places. [2024-06-21 21:19:23,522 INFO L231 Difference]: Finished difference. Result has 119 places, 208 transitions, 2572 flow [2024-06-21 21:19:23,523 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=2485, PETRI_DIFFERENCE_MINUEND_PLACES=113, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=204, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=190, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2572, PETRI_PLACES=119, PETRI_TRANSITIONS=208} [2024-06-21 21:19:23,523 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 65 predicate places. [2024-06-21 21:19:23,523 INFO L495 AbstractCegarLoop]: Abstraction has has 119 places, 208 transitions, 2572 flow [2024-06-21 21:19:23,523 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) [2024-06-21 21:19:23,524 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:19:23,524 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:19:23,524 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-21 21:19:23,524 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)] === [2024-06-21 21:19:23,524 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:19:23,524 INFO L85 PathProgramCache]: Analyzing trace with hash 1103530162, now seen corresponding path program 1 times [2024-06-21 21:19:23,524 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:19:23,525 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2050239309] [2024-06-21 21:19:23,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:19:23,525 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:19:23,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:19:24,155 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:19:24,155 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:19:24,155 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2050239309] [2024-06-21 21:19:24,155 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2050239309] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:19:24,155 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:19:24,155 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 21:19:24,155 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [514812768] [2024-06-21 21:19:24,156 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:19:24,156 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 21:19:24,156 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:19:24,156 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 21:19:24,156 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 21:19:24,226 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 51 [2024-06-21 21:19:24,227 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 208 transitions, 2572 flow. Second operand has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:19:24,227 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:19:24,227 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 51 [2024-06-21 21:19:24,227 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:19:26,004 INFO L124 PetriNetUnfolderBase]: 10775/14879 cut-off events. [2024-06-21 21:19:26,005 INFO L125 PetriNetUnfolderBase]: For 290357/290393 co-relation queries the response was YES. [2024-06-21 21:19:26,058 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89535 conditions, 14879 events. 10775/14879 cut-off events. For 290357/290393 co-relation queries the response was YES. Maximal size of possible extension queue 486. Compared 80126 event pairs, 3384 based on Foata normal form. 38/14914 useless extension candidates. Maximal degree in co-relation 89484. Up to 14194 conditions per place. [2024-06-21 21:19:26,129 INFO L140 encePairwiseOnDemand]: 40/51 looper letters, 207 selfloop transitions, 41 changer transitions 0/254 dead transitions. [2024-06-21 21:19:26,129 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 125 places, 254 transitions, 3418 flow [2024-06-21 21:19:26,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 21:19:26,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 21:19:26,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 171 transitions. [2024-06-21 21:19:26,131 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4789915966386555 [2024-06-21 21:19:26,131 INFO L175 Difference]: Start difference. First operand has 119 places, 208 transitions, 2572 flow. Second operand 7 states and 171 transitions. [2024-06-21 21:19:26,131 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 125 places, 254 transitions, 3418 flow [2024-06-21 21:19:26,379 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 121 places, 254 transitions, 3361 flow, removed 17 selfloop flow, removed 4 redundant places. [2024-06-21 21:19:26,382 INFO L231 Difference]: Finished difference. Result has 122 places, 214 transitions, 2733 flow [2024-06-21 21:19:26,383 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=2515, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=208, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=170, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2733, PETRI_PLACES=122, PETRI_TRANSITIONS=214} [2024-06-21 21:19:26,383 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 68 predicate places. [2024-06-21 21:19:26,383 INFO L495 AbstractCegarLoop]: Abstraction has has 122 places, 214 transitions, 2733 flow [2024-06-21 21:19:26,383 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:19:26,384 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:19:26,384 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:19:26,384 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-21 21:19:26,384 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)] === [2024-06-21 21:19:26,384 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:19:26,384 INFO L85 PathProgramCache]: Analyzing trace with hash -2006921832, now seen corresponding path program 2 times [2024-06-21 21:19:26,385 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:19:26,385 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1278324451] [2024-06-21 21:19:26,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:19:26,385 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:19:26,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:19:27,056 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:19:27,057 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:19:27,057 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1278324451] [2024-06-21 21:19:27,057 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1278324451] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:19:27,057 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:19:27,057 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 21:19:27,057 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [949159012] [2024-06-21 21:19:27,057 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:19:27,057 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 21:19:27,057 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:19:27,058 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 21:19:27,058 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-21 21:19:27,148 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 51 [2024-06-21 21:19:27,149 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 214 transitions, 2733 flow. Second operand has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:19:27,149 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:19:27,149 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 51 [2024-06-21 21:19:27,149 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:19:28,906 INFO L124 PetriNetUnfolderBase]: 10760/14849 cut-off events. [2024-06-21 21:19:28,906 INFO L125 PetriNetUnfolderBase]: For 320750/320770 co-relation queries the response was YES. [2024-06-21 21:19:29,015 INFO L83 FinitePrefix]: Finished finitePrefix Result has 91984 conditions, 14849 events. 10760/14849 cut-off events. For 320750/320770 co-relation queries the response was YES. Maximal size of possible extension queue 486. Compared 79812 event pairs, 4052 based on Foata normal form. 22/14868 useless extension candidates. Maximal degree in co-relation 91932. Up to 14309 conditions per place. [2024-06-21 21:19:29,098 INFO L140 encePairwiseOnDemand]: 39/51 looper letters, 206 selfloop transitions, 40 changer transitions 0/252 dead transitions. [2024-06-21 21:19:29,098 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 252 transitions, 3355 flow [2024-06-21 21:19:29,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 21:19:29,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 21:19:29,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 168 transitions. [2024-06-21 21:19:29,101 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47058823529411764 [2024-06-21 21:19:29,102 INFO L175 Difference]: Start difference. First operand has 122 places, 214 transitions, 2733 flow. Second operand 7 states and 168 transitions. [2024-06-21 21:19:29,102 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 252 transitions, 3355 flow [2024-06-21 21:19:29,565 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 252 transitions, 3219 flow, removed 51 selfloop flow, removed 3 redundant places. [2024-06-21 21:19:29,568 INFO L231 Difference]: Finished difference. Result has 126 places, 214 transitions, 2689 flow [2024-06-21 21:19:29,569 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=2597, PETRI_DIFFERENCE_MINUEND_PLACES=119, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=214, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=174, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2689, PETRI_PLACES=126, PETRI_TRANSITIONS=214} [2024-06-21 21:19:29,569 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 72 predicate places. [2024-06-21 21:19:29,569 INFO L495 AbstractCegarLoop]: Abstraction has has 126 places, 214 transitions, 2689 flow [2024-06-21 21:19:29,570 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:19:29,570 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:19:29,570 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:19:29,570 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-21 21:19:29,571 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)] === [2024-06-21 21:19:29,571 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:19:29,571 INFO L85 PathProgramCache]: Analyzing trace with hash 1221862990, now seen corresponding path program 1 times [2024-06-21 21:19:29,571 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:19:29,571 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1972837399] [2024-06-21 21:19:29,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:19:29,572 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:19:29,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:19:30,379 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:19:30,379 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:19:30,379 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1972837399] [2024-06-21 21:19:30,379 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1972837399] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:19:30,379 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:19:30,380 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:19:30,380 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1829995670] [2024-06-21 21:19:30,380 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:19:30,380 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:19:30,381 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:19:30,382 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:19:30,382 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:19:30,456 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 51 [2024-06-21 21:19:30,461 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 126 places, 214 transitions, 2689 flow. Second operand has 9 states, 9 states have (on average 12.333333333333334) internal successors, (111), 9 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:19:30,461 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:19:30,461 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 51 [2024-06-21 21:19:30,461 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:19:32,480 INFO L124 PetriNetUnfolderBase]: 11085/15323 cut-off events. [2024-06-21 21:19:32,480 INFO L125 PetriNetUnfolderBase]: For 359849/359869 co-relation queries the response was YES. [2024-06-21 21:19:32,546 INFO L83 FinitePrefix]: Finished finitePrefix Result has 95655 conditions, 15323 events. 11085/15323 cut-off events. For 359849/359869 co-relation queries the response was YES. Maximal size of possible extension queue 497. Compared 83287 event pairs, 4024 based on Foata normal form. 63/15382 useless extension candidates. Maximal degree in co-relation 95601. Up to 13521 conditions per place. [2024-06-21 21:19:32,622 INFO L140 encePairwiseOnDemand]: 37/51 looper letters, 133 selfloop transitions, 133 changer transitions 0/272 dead transitions. [2024-06-21 21:19:32,622 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 133 places, 272 transitions, 3713 flow [2024-06-21 21:19:32,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:19:32,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:19:32,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 208 transitions. [2024-06-21 21:19:32,624 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5098039215686274 [2024-06-21 21:19:32,624 INFO L175 Difference]: Start difference. First operand has 126 places, 214 transitions, 2689 flow. Second operand 8 states and 208 transitions. [2024-06-21 21:19:32,624 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 133 places, 272 transitions, 3713 flow [2024-06-21 21:19:33,014 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 127 places, 272 transitions, 3621 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-06-21 21:19:33,018 INFO L231 Difference]: Finished difference. Result has 128 places, 218 transitions, 2961 flow [2024-06-21 21:19:33,018 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=2597, PETRI_DIFFERENCE_MINUEND_PLACES=120, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=214, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=129, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2961, PETRI_PLACES=128, PETRI_TRANSITIONS=218} [2024-06-21 21:19:33,018 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 74 predicate places. [2024-06-21 21:19:33,019 INFO L495 AbstractCegarLoop]: Abstraction has has 128 places, 218 transitions, 2961 flow [2024-06-21 21:19:33,019 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) [2024-06-21 21:19:33,019 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:19:33,019 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:19:33,019 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-21 21:19:33,019 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)] === [2024-06-21 21:19:33,020 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:19:33,020 INFO L85 PathProgramCache]: Analyzing trace with hash 545933055, now seen corresponding path program 1 times [2024-06-21 21:19:33,020 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:19:33,020 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [706659072] [2024-06-21 21:19:33,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:19:33,020 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:19:33,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:19:33,589 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:19:33,589 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:19:33,589 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [706659072] [2024-06-21 21:19:33,589 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [706659072] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:19:33,589 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:19:33,590 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 21:19:33,590 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1855539406] [2024-06-21 21:19:33,590 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:19:33,590 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 21:19:33,590 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:19:33,590 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 21:19:33,590 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-21 21:19:33,636 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 51 [2024-06-21 21:19:33,636 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 128 places, 218 transitions, 2961 flow. Second operand has 7 states, 7 states have (on average 12.857142857142858) internal successors, (90), 7 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:19:33,636 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:19:33,636 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 51 [2024-06-21 21:19:33,636 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:19:35,411 INFO L124 PetriNetUnfolderBase]: 11108/15356 cut-off events. [2024-06-21 21:19:35,411 INFO L125 PetriNetUnfolderBase]: For 386618/386632 co-relation queries the response was YES. [2024-06-21 21:19:35,483 INFO L83 FinitePrefix]: Finished finitePrefix Result has 100302 conditions, 15356 events. 11108/15356 cut-off events. For 386618/386632 co-relation queries the response was YES. Maximal size of possible extension queue 497. Compared 83260 event pairs, 4061 based on Foata normal form. 18/15372 useless extension candidates. Maximal degree in co-relation 100247. Up to 15010 conditions per place. [2024-06-21 21:19:35,563 INFO L140 encePairwiseOnDemand]: 41/51 looper letters, 219 selfloop transitions, 29 changer transitions 0/254 dead transitions. [2024-06-21 21:19:35,563 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 133 places, 254 transitions, 3783 flow [2024-06-21 21:19:35,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 21:19:35,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 21:19:35,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 142 transitions. [2024-06-21 21:19:35,564 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46405228758169936 [2024-06-21 21:19:35,564 INFO L175 Difference]: Start difference. First operand has 128 places, 218 transitions, 2961 flow. Second operand 6 states and 142 transitions. [2024-06-21 21:19:35,564 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 133 places, 254 transitions, 3783 flow [2024-06-21 21:19:36,213 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 127 places, 254 transitions, 3461 flow, removed 27 selfloop flow, removed 6 redundant places. [2024-06-21 21:19:36,216 INFO L231 Difference]: Finished difference. Result has 128 places, 225 transitions, 2851 flow [2024-06-21 21:19:36,216 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=2651, PETRI_DIFFERENCE_MINUEND_PLACES=122, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=218, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=196, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2851, PETRI_PLACES=128, PETRI_TRANSITIONS=225} [2024-06-21 21:19:36,217 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 74 predicate places. [2024-06-21 21:19:36,217 INFO L495 AbstractCegarLoop]: Abstraction has has 128 places, 225 transitions, 2851 flow [2024-06-21 21:19:36,217 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.857142857142858) internal successors, (90), 7 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:19:36,217 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:19:36,217 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:19:36,218 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-21 21:19:36,218 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)] === [2024-06-21 21:19:36,218 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:19:36,218 INFO L85 PathProgramCache]: Analyzing trace with hash 717397692, now seen corresponding path program 2 times [2024-06-21 21:19:36,218 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:19:36,218 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [432403996] [2024-06-21 21:19:36,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:19:36,219 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:19:36,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:19:36,922 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:19:36,922 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:19:36,922 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [432403996] [2024-06-21 21:19:36,922 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [432403996] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:19:36,922 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:19:36,923 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:19:36,923 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [141646266] [2024-06-21 21:19:36,923 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:19:36,925 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:19:36,925 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:19:36,926 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:19:36,926 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:19:36,997 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 51 [2024-06-21 21:19:36,997 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 128 places, 225 transitions, 2851 flow. Second operand has 9 states, 9 states have (on average 12.333333333333334) internal successors, (111), 9 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:19:36,997 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:19:36,997 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 51 [2024-06-21 21:19:36,997 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:19:38,953 INFO L124 PetriNetUnfolderBase]: 11179/15433 cut-off events. [2024-06-21 21:19:38,953 INFO L125 PetriNetUnfolderBase]: For 403442/403452 co-relation queries the response was YES. [2024-06-21 21:19:39,032 INFO L83 FinitePrefix]: Finished finitePrefix Result has 99558 conditions, 15433 events. 11179/15433 cut-off events. For 403442/403452 co-relation queries the response was YES. Maximal size of possible extension queue 498. Compared 83599 event pairs, 4063 based on Foata normal form. 18/15436 useless extension candidates. Maximal degree in co-relation 99502. Up to 13972 conditions per place. [2024-06-21 21:19:39,118 INFO L140 encePairwiseOnDemand]: 37/51 looper letters, 132 selfloop transitions, 140 changer transitions 0/278 dead transitions. [2024-06-21 21:19:39,118 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 135 places, 278 transitions, 3903 flow [2024-06-21 21:19:39,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:19:39,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:19:39,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 202 transitions. [2024-06-21 21:19:39,119 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4950980392156863 [2024-06-21 21:19:39,120 INFO L175 Difference]: Start difference. First operand has 128 places, 225 transitions, 2851 flow. Second operand 8 states and 202 transitions. [2024-06-21 21:19:39,120 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 135 places, 278 transitions, 3903 flow [2024-06-21 21:19:39,521 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 278 transitions, 3521 flow, removed 29 selfloop flow, removed 7 redundant places. [2024-06-21 21:19:39,524 INFO L231 Difference]: Finished difference. Result has 129 places, 229 transitions, 2851 flow [2024-06-21 21:19:39,525 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=2469, PETRI_DIFFERENCE_MINUEND_PLACES=121, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=225, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=136, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2851, PETRI_PLACES=129, PETRI_TRANSITIONS=229} [2024-06-21 21:19:39,525 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 75 predicate places. [2024-06-21 21:19:39,525 INFO L495 AbstractCegarLoop]: Abstraction has has 129 places, 229 transitions, 2851 flow [2024-06-21 21:19:39,525 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.333333333333334) internal successors, (111), 9 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:19:39,525 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:19:39,526 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:19:39,526 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-21 21:19:39,526 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)] === [2024-06-21 21:19:39,526 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:19:39,526 INFO L85 PathProgramCache]: Analyzing trace with hash 945298842, now seen corresponding path program 3 times [2024-06-21 21:19:39,526 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:19:39,526 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1856088865] [2024-06-21 21:19:39,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:19:39,527 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:19:39,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:19:40,302 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:19:40,302 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:19:40,302 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1856088865] [2024-06-21 21:19:40,303 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1856088865] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:19:40,303 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:19:40,303 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:19:40,303 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1231873777] [2024-06-21 21:19:40,303 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:19:40,304 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:19:40,305 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:19:40,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:19:40,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:19:40,392 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 51 [2024-06-21 21:19:40,392 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 129 places, 229 transitions, 2851 flow. Second operand has 9 states, 9 states have (on average 12.333333333333334) internal successors, (111), 9 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:19:40,392 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:19:40,392 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 51 [2024-06-21 21:19:40,393 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:19:42,924 INFO L124 PetriNetUnfolderBase]: 11250/15544 cut-off events. [2024-06-21 21:19:42,924 INFO L125 PetriNetUnfolderBase]: For 434929/434947 co-relation queries the response was YES. [2024-06-21 21:19:42,990 INFO L83 FinitePrefix]: Finished finitePrefix Result has 103838 conditions, 15544 events. 11250/15544 cut-off events. For 434929/434947 co-relation queries the response was YES. Maximal size of possible extension queue 499. Compared 84170 event pairs, 4047 based on Foata normal form. 26/15555 useless extension candidates. Maximal degree in co-relation 103783. Up to 14077 conditions per place. [2024-06-21 21:19:43,086 INFO L140 encePairwiseOnDemand]: 37/51 looper letters, 127 selfloop transitions, 148 changer transitions 0/281 dead transitions. [2024-06-21 21:19:43,087 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 136 places, 281 transitions, 3837 flow [2024-06-21 21:19:43,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:19:43,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:19:43,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 201 transitions. [2024-06-21 21:19:43,088 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49264705882352944 [2024-06-21 21:19:43,088 INFO L175 Difference]: Start difference. First operand has 129 places, 229 transitions, 2851 flow. Second operand 8 states and 201 transitions. [2024-06-21 21:19:43,088 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 136 places, 281 transitions, 3837 flow [2024-06-21 21:19:43,462 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 130 places, 281 transitions, 3489 flow, removed 37 selfloop flow, removed 6 redundant places. [2024-06-21 21:19:43,465 INFO L231 Difference]: Finished difference. Result has 131 places, 233 transitions, 2909 flow [2024-06-21 21:19:43,466 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=2503, PETRI_DIFFERENCE_MINUEND_PLACES=123, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=229, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=144, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2909, PETRI_PLACES=131, PETRI_TRANSITIONS=233} [2024-06-21 21:19:43,466 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 77 predicate places. [2024-06-21 21:19:43,466 INFO L495 AbstractCegarLoop]: Abstraction has has 131 places, 233 transitions, 2909 flow [2024-06-21 21:19:43,467 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.333333333333334) internal successors, (111), 9 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:19:43,467 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:19:43,467 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:19:43,467 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-21 21:19:43,467 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)] === [2024-06-21 21:19:43,467 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:19:43,467 INFO L85 PathProgramCache]: Analyzing trace with hash 953869722, now seen corresponding path program 4 times [2024-06-21 21:19:43,468 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:19:43,468 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [812229818] [2024-06-21 21:19:43,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:19:43,468 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:19:43,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:19:44,349 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:19:44,349 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:19:44,349 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [812229818] [2024-06-21 21:19:44,349 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [812229818] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:19:44,349 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:19:44,349 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:19:44,349 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1774537499] [2024-06-21 21:19:44,349 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:19:44,349 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:19:44,350 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:19:44,350 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:19:44,350 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:19:44,420 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 51 [2024-06-21 21:19:44,421 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 131 places, 233 transitions, 2909 flow. Second operand has 9 states, 9 states have (on average 12.333333333333334) internal successors, (111), 9 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:19:44,421 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:19:44,421 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 51 [2024-06-21 21:19:44,421 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:19:46,765 INFO L124 PetriNetUnfolderBase]: 11270/15572 cut-off events. [2024-06-21 21:19:46,765 INFO L125 PetriNetUnfolderBase]: For 469194/469212 co-relation queries the response was YES. [2024-06-21 21:19:46,825 INFO L83 FinitePrefix]: Finished finitePrefix Result has 106566 conditions, 15572 events. 11270/15572 cut-off events. For 469194/469212 co-relation queries the response was YES. Maximal size of possible extension queue 500. Compared 84471 event pairs, 3661 based on Foata normal form. 26/15583 useless extension candidates. Maximal degree in co-relation 106510. Up to 13517 conditions per place. [2024-06-21 21:19:46,903 INFO L140 encePairwiseOnDemand]: 37/51 looper letters, 119 selfloop transitions, 163 changer transitions 0/288 dead transitions. [2024-06-21 21:19:46,904 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 138 places, 288 transitions, 3933 flow [2024-06-21 21:19:46,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:19:46,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:19:46,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 205 transitions. [2024-06-21 21:19:46,905 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5024509803921569 [2024-06-21 21:19:46,905 INFO L175 Difference]: Start difference. First operand has 131 places, 233 transitions, 2909 flow. Second operand 8 states and 205 transitions. [2024-06-21 21:19:46,905 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 138 places, 288 transitions, 3933 flow [2024-06-21 21:19:47,354 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 132 places, 288 transitions, 3561 flow, removed 41 selfloop flow, removed 6 redundant places. [2024-06-21 21:19:47,357 INFO L231 Difference]: Finished difference. Result has 133 places, 237 transitions, 2980 flow [2024-06-21 21:19:47,357 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=2537, PETRI_DIFFERENCE_MINUEND_PLACES=125, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=233, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=159, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2980, PETRI_PLACES=133, PETRI_TRANSITIONS=237} [2024-06-21 21:19:47,358 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 79 predicate places. [2024-06-21 21:19:47,358 INFO L495 AbstractCegarLoop]: Abstraction has has 133 places, 237 transitions, 2980 flow [2024-06-21 21:19:47,358 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.333333333333334) internal successors, (111), 9 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:19:47,358 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:19:47,358 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:19:47,358 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-21 21:19:47,359 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 21:19:47,359 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:19:47,359 INFO L85 PathProgramCache]: Analyzing trace with hash 170289303, now seen corresponding path program 2 times [2024-06-21 21:19:47,359 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:19:47,359 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [313986168] [2024-06-21 21:19:47,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:19:47,359 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:19:47,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:19:47,997 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:19:47,997 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:19:47,997 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [313986168] [2024-06-21 21:19:47,998 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [313986168] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:19:47,998 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:19:47,998 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 21:19:47,998 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [146796275] [2024-06-21 21:19:47,998 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:19:47,999 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 21:19:47,999 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:19:47,999 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 21:19:47,999 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-21 21:19:48,069 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 51 [2024-06-21 21:19:48,069 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 133 places, 237 transitions, 2980 flow. Second operand has 7 states, 7 states have (on average 12.857142857142858) internal successors, (90), 7 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:19:48,069 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:19:48,069 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 51 [2024-06-21 21:19:48,069 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:19:50,125 INFO L124 PetriNetUnfolderBase]: 11259/15577 cut-off events. [2024-06-21 21:19:50,125 INFO L125 PetriNetUnfolderBase]: For 502570/502598 co-relation queries the response was YES. [2024-06-21 21:19:50,185 INFO L83 FinitePrefix]: Finished finitePrefix Result has 109192 conditions, 15577 events. 11259/15577 cut-off events. For 502570/502598 co-relation queries the response was YES. Maximal size of possible extension queue 500. Compared 84635 event pairs, 4063 based on Foata normal form. 23/15594 useless extension candidates. Maximal degree in co-relation 109135. Up to 15229 conditions per place. [2024-06-21 21:19:50,265 INFO L140 encePairwiseOnDemand]: 41/51 looper letters, 224 selfloop transitions, 29 changer transitions 0/259 dead transitions. [2024-06-21 21:19:50,266 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 138 places, 259 transitions, 3568 flow [2024-06-21 21:19:50,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 21:19:50,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 21:19:50,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 134 transitions. [2024-06-21 21:19:50,267 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43790849673202614 [2024-06-21 21:19:50,267 INFO L175 Difference]: Start difference. First operand has 133 places, 237 transitions, 2980 flow. Second operand 6 states and 134 transitions. [2024-06-21 21:19:50,267 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 138 places, 259 transitions, 3568 flow [2024-06-21 21:19:50,751 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 132 places, 259 transitions, 3131 flow, removed 58 selfloop flow, removed 6 redundant places. [2024-06-21 21:19:50,754 INFO L231 Difference]: Finished difference. Result has 133 places, 237 transitions, 2613 flow [2024-06-21 21:19:50,754 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=2543, PETRI_DIFFERENCE_MINUEND_PLACES=127, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=237, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=208, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2613, PETRI_PLACES=133, PETRI_TRANSITIONS=237} [2024-06-21 21:19:50,755 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 79 predicate places. [2024-06-21 21:19:50,755 INFO L495 AbstractCegarLoop]: Abstraction has has 133 places, 237 transitions, 2613 flow [2024-06-21 21:19:50,755 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.857142857142858) internal successors, (90), 7 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:19:50,755 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:19:50,755 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:19:50,755 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-21 21:19:50,755 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)] === [2024-06-21 21:19:50,756 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:19:50,756 INFO L85 PathProgramCache]: Analyzing trace with hash 214620299, now seen corresponding path program 1 times [2024-06-21 21:19:50,756 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:19:50,756 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1524302948] [2024-06-21 21:19:50,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:19:50,756 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:19:50,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:19:51,373 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:19:51,373 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:19:51,373 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1524302948] [2024-06-21 21:19:51,373 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1524302948] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:19:51,373 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:19:51,373 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 21:19:51,374 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [845439134] [2024-06-21 21:19:51,374 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:19:51,374 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 21:19:51,374 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:19:51,374 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 21:19:51,374 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-21 21:19:51,434 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 51 [2024-06-21 21:19:51,434 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 133 places, 237 transitions, 2613 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) [2024-06-21 21:19:51,434 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:19:51,434 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 51 [2024-06-21 21:19:51,434 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:19:53,542 INFO L124 PetriNetUnfolderBase]: 9873/14073 cut-off events. [2024-06-21 21:19:53,542 INFO L125 PetriNetUnfolderBase]: For 439237/439243 co-relation queries the response was YES. [2024-06-21 21:19:53,605 INFO L83 FinitePrefix]: Finished finitePrefix Result has 95462 conditions, 14073 events. 9873/14073 cut-off events. For 439237/439243 co-relation queries the response was YES. Maximal size of possible extension queue 458. Compared 79319 event pairs, 3453 based on Foata normal form. 8/14079 useless extension candidates. Maximal degree in co-relation 95404. Up to 13379 conditions per place. [2024-06-21 21:19:53,766 INFO L140 encePairwiseOnDemand]: 40/51 looper letters, 232 selfloop transitions, 25 changer transitions 0/264 dead transitions. [2024-06-21 21:19:53,767 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 138 places, 264 transitions, 3354 flow [2024-06-21 21:19:53,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 21:19:53,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 21:19:53,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 146 transitions. [2024-06-21 21:19:53,768 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.477124183006536 [2024-06-21 21:19:53,768 INFO L175 Difference]: Start difference. First operand has 133 places, 237 transitions, 2613 flow. Second operand 6 states and 146 transitions. [2024-06-21 21:19:53,768 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 138 places, 264 transitions, 3354 flow [2024-06-21 21:19:54,165 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 133 places, 264 transitions, 3273 flow, removed 8 selfloop flow, removed 5 redundant places. [2024-06-21 21:19:54,168 INFO L231 Difference]: Finished difference. Result has 134 places, 241 transitions, 2648 flow [2024-06-21 21:19:54,168 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=2532, PETRI_DIFFERENCE_MINUEND_PLACES=128, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=237, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=215, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2648, PETRI_PLACES=134, PETRI_TRANSITIONS=241} [2024-06-21 21:19:54,168 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 80 predicate places. [2024-06-21 21:19:54,169 INFO L495 AbstractCegarLoop]: Abstraction has has 134 places, 241 transitions, 2648 flow [2024-06-21 21:19:54,169 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) [2024-06-21 21:19:54,169 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:19:54,169 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:19:54,169 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-21 21:19:54,169 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 21:19:54,170 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:19:54,170 INFO L85 PathProgramCache]: Analyzing trace with hash 1674587007, now seen corresponding path program 2 times [2024-06-21 21:19:54,170 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:19:54,170 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1312281170] [2024-06-21 21:19:54,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:19:54,170 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:19:54,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:19:54,763 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:19:54,763 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:19:54,763 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1312281170] [2024-06-21 21:19:54,765 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1312281170] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:19:54,765 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:19:54,765 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 21:19:54,766 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1850555531] [2024-06-21 21:19:54,766 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:19:54,766 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 21:19:54,766 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:19:54,767 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 21:19:54,767 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-21 21:19:54,849 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 51 [2024-06-21 21:19:54,849 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 134 places, 241 transitions, 2648 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) [2024-06-21 21:19:54,849 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:19:54,849 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 51 [2024-06-21 21:19:54,849 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:19:56,803 INFO L124 PetriNetUnfolderBase]: 9827/13998 cut-off events. [2024-06-21 21:19:56,803 INFO L125 PetriNetUnfolderBase]: For 460155/460163 co-relation queries the response was YES. [2024-06-21 21:19:56,858 INFO L83 FinitePrefix]: Finished finitePrefix Result has 95969 conditions, 13998 events. 9827/13998 cut-off events. For 460155/460163 co-relation queries the response was YES. Maximal size of possible extension queue 454. Compared 78848 event pairs, 3465 based on Foata normal form. 3/13996 useless extension candidates. Maximal degree in co-relation 95910. Up to 13317 conditions per place. [2024-06-21 21:19:56,927 INFO L140 encePairwiseOnDemand]: 40/51 looper letters, 226 selfloop transitions, 26 changer transitions 0/259 dead transitions. [2024-06-21 21:19:56,927 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 139 places, 259 transitions, 3208 flow [2024-06-21 21:19:56,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 21:19:56,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 21:19:56,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 142 transitions. [2024-06-21 21:19:56,928 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46405228758169936 [2024-06-21 21:19:56,928 INFO L175 Difference]: Start difference. First operand has 134 places, 241 transitions, 2648 flow. Second operand 6 states and 142 transitions. [2024-06-21 21:19:56,928 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 139 places, 259 transitions, 3208 flow [2024-06-21 21:19:57,360 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 136 places, 259 transitions, 3153 flow, removed 13 selfloop flow, removed 3 redundant places. [2024-06-21 21:19:57,363 INFO L231 Difference]: Finished difference. Result has 137 places, 241 transitions, 2654 flow [2024-06-21 21:19:57,364 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=2593, PETRI_DIFFERENCE_MINUEND_PLACES=131, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=241, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=215, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2654, PETRI_PLACES=137, PETRI_TRANSITIONS=241} [2024-06-21 21:19:57,364 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 83 predicate places. [2024-06-21 21:19:57,364 INFO L495 AbstractCegarLoop]: Abstraction has has 137 places, 241 transitions, 2654 flow [2024-06-21 21:19:57,364 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) [2024-06-21 21:19:57,364 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:19:57,365 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:19:57,365 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-21 21:19:57,365 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)] === [2024-06-21 21:19:57,365 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:19:57,365 INFO L85 PathProgramCache]: Analyzing trace with hash -1314129812, now seen corresponding path program 1 times [2024-06-21 21:19:57,365 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:19:57,365 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1376308061] [2024-06-21 21:19:57,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:19:57,366 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:19:57,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:19:58,199 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:19:58,199 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:19:58,199 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1376308061] [2024-06-21 21:19:58,199 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1376308061] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:19:58,200 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:19:58,200 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:19:58,200 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [707336949] [2024-06-21 21:19:58,200 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:19:58,200 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:19:58,200 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:19:58,200 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:19:58,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:19:58,285 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 51 [2024-06-21 21:19:58,286 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 137 places, 241 transitions, 2654 flow. Second operand has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:19:58,286 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:19:58,286 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 51 [2024-06-21 21:19:58,286 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:20:00,708 INFO L124 PetriNetUnfolderBase]: 11820/16425 cut-off events. [2024-06-21 21:20:00,709 INFO L125 PetriNetUnfolderBase]: For 614071/614083 co-relation queries the response was YES. [2024-06-21 21:20:00,788 INFO L83 FinitePrefix]: Finished finitePrefix Result has 116727 conditions, 16425 events. 11820/16425 cut-off events. For 614071/614083 co-relation queries the response was YES. Maximal size of possible extension queue 541. Compared 91036 event pairs, 3206 based on Foata normal form. 35/16456 useless extension candidates. Maximal degree in co-relation 116667. Up to 12932 conditions per place. [2024-06-21 21:20:00,877 INFO L140 encePairwiseOnDemand]: 38/51 looper letters, 168 selfloop transitions, 136 changer transitions 0/310 dead transitions. [2024-06-21 21:20:00,878 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 144 places, 310 transitions, 4100 flow [2024-06-21 21:20:00,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:20:00,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:20:00,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 211 transitions. [2024-06-21 21:20:00,879 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5171568627450981 [2024-06-21 21:20:00,879 INFO L175 Difference]: Start difference. First operand has 137 places, 241 transitions, 2654 flow. Second operand 8 states and 211 transitions. [2024-06-21 21:20:00,879 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 144 places, 310 transitions, 4100 flow [2024-06-21 21:20:01,509 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 137 places, 310 transitions, 4008 flow, removed 4 selfloop flow, removed 7 redundant places. [2024-06-21 21:20:01,512 INFO L231 Difference]: Finished difference. Result has 140 places, 250 transitions, 3118 flow [2024-06-21 21:20:01,513 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=2562, PETRI_DIFFERENCE_MINUEND_PLACES=130, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=241, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=129, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=109, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3118, PETRI_PLACES=140, PETRI_TRANSITIONS=250} [2024-06-21 21:20:01,515 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 86 predicate places. [2024-06-21 21:20:01,515 INFO L495 AbstractCegarLoop]: Abstraction has has 140 places, 250 transitions, 3118 flow [2024-06-21 21:20:01,515 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:20:01,515 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:20:01,515 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:20:01,515 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-21 21:20:01,515 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)] === [2024-06-21 21:20:01,516 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:20:01,516 INFO L85 PathProgramCache]: Analyzing trace with hash -1225564052, now seen corresponding path program 2 times [2024-06-21 21:20:01,516 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:20:01,516 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1129570928] [2024-06-21 21:20:01,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:20:01,516 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:20:01,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:20:02,286 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:20:02,286 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:20:02,286 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1129570928] [2024-06-21 21:20:02,286 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1129570928] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:20:02,286 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:20:02,286 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 21:20:02,286 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [24882397] [2024-06-21 21:20:02,286 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:20:02,286 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 21:20:02,287 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:20:02,287 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 21:20:02,287 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 21:20:02,370 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 51 [2024-06-21 21:20:02,370 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 140 places, 250 transitions, 3118 flow. Second operand has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:20:02,370 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:20:02,370 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 51 [2024-06-21 21:20:02,370 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:20:04,999 INFO L124 PetriNetUnfolderBase]: 12223/17021 cut-off events. [2024-06-21 21:20:05,000 INFO L125 PetriNetUnfolderBase]: For 689802/689814 co-relation queries the response was YES. [2024-06-21 21:20:05,096 INFO L83 FinitePrefix]: Finished finitePrefix Result has 127354 conditions, 17021 events. 12223/17021 cut-off events. For 689802/689814 co-relation queries the response was YES. Maximal size of possible extension queue 579. Compared 95361 event pairs, 4221 based on Foata normal form. 35/17052 useless extension candidates. Maximal degree in co-relation 127292. Up to 14571 conditions per place. [2024-06-21 21:20:05,340 INFO L140 encePairwiseOnDemand]: 37/51 looper letters, 162 selfloop transitions, 144 changer transitions 0/312 dead transitions. [2024-06-21 21:20:05,340 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 147 places, 312 transitions, 4436 flow [2024-06-21 21:20:05,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 21:20:05,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 21:20:05,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 209 transitions. [2024-06-21 21:20:05,342 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5122549019607843 [2024-06-21 21:20:05,342 INFO L175 Difference]: Start difference. First operand has 140 places, 250 transitions, 3118 flow. Second operand 8 states and 209 transitions. [2024-06-21 21:20:05,342 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 147 places, 312 transitions, 4436 flow [2024-06-21 21:20:06,077 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 144 places, 312 transitions, 4227 flow, removed 43 selfloop flow, removed 3 redundant places. [2024-06-21 21:20:06,081 INFO L231 Difference]: Finished difference. Result has 146 places, 257 transitions, 3425 flow [2024-06-21 21:20:06,081 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=2909, PETRI_DIFFERENCE_MINUEND_PLACES=137, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=250, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=139, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=108, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3425, PETRI_PLACES=146, PETRI_TRANSITIONS=257} [2024-06-21 21:20:06,082 INFO L281 CegarLoopForPetriNet]: 54 programPoint places, 92 predicate places. [2024-06-21 21:20:06,082 INFO L495 AbstractCegarLoop]: Abstraction has has 146 places, 257 transitions, 3425 flow [2024-06-21 21:20:06,082 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:20:06,082 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 21:20:06,083 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 21:20:06,083 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-21 21:20:06,083 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-21 21:20:06,083 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 21:20:06,083 INFO L85 PathProgramCache]: Analyzing trace with hash -256241325, now seen corresponding path program 1 times [2024-06-21 21:20:06,083 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 21:20:06,083 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1375981128] [2024-06-21 21:20:06,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 21:20:06,084 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 21:20:06,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 21:20:06,739 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 21:20:06,740 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 21:20:06,740 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1375981128] [2024-06-21 21:20:06,740 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1375981128] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 21:20:06,740 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 21:20:06,740 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 21:20:06,740 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [987108259] [2024-06-21 21:20:06,740 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 21:20:06,741 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 21:20:06,741 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 21:20:06,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 21:20:06,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-21 21:20:06,801 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 51 [2024-06-21 21:20:06,802 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 146 places, 257 transitions, 3425 flow. Second operand has 8 states, 8 states have (on average 12.75) internal successors, (102), 8 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 21:20:06,802 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 21:20:06,802 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 51 [2024-06-21 21:20:06,802 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 21:20:09,538 INFO L124 PetriNetUnfolderBase]: 12319/17204 cut-off events. [2024-06-21 21:20:09,538 INFO L125 PetriNetUnfolderBase]: For 745805/745831 co-relation queries the response was YES. [2024-06-21 21:20:09,610 INFO L83 FinitePrefix]: Finished finitePrefix Result has 132230 conditions, 17204 events. 12319/17204 cut-off events. For 745805/745831 co-relation queries the response was YES. Maximal size of possible extension queue 581. Compared 96969 event pairs, 4286 based on Foata normal form. 33/17233 useless extension candidates. Maximal degree in co-relation 132165. Up to 15632 conditions per place. [2024-06-21 21:20:09,718 INFO L140 encePairwiseOnDemand]: 38/51 looper letters, 154 selfloop transitions, 148 changer transitions 0/308 dead transitions. [2024-06-21 21:20:09,718 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 152 places, 308 transitions, 4584 flow [2024-06-21 21:20:09,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 21:20:09,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 21:20:09,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 179 transitions. [2024-06-21 21:20:09,720 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5014005602240896 [2024-06-21 21:20:09,720 INFO L175 Difference]: Start difference. First operand has 146 places, 257 transitions, 3425 flow. Second operand 7 states and 179 transitions. [2024-06-21 21:20:09,720 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 152 places, 308 transitions, 4584 flow