./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/mix023_power.opt_pso.opt_rmo.opt.i --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --validate ./goblint.2024-05-21_14-57-05.files/protection/mix023_power.opt_pso.opt_rmo.opt.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version cde23df1 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/mix023_power.opt_pso.opt_rmo.opt.i ./goblint.2024-05-21_14-57-05.files/protection/mix023_power.opt_pso.opt_rmo.opt.yml/witness.yml -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --traceabstraction.compute.hoare.annotation.of.negated.interpolant.automaton,.abstraction.and.cfg false --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.fs.goblint-validation-cde23df-m [2024-06-14 12:09:10,246 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-14 12:09:10,318 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-14 12:09:10,322 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-14 12:09:10,323 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-14 12:09:10,344 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-14 12:09:10,344 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-14 12:09:10,345 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-14 12:09:10,345 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-14 12:09:10,348 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-14 12:09:10,348 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-14 12:09:10,349 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-14 12:09:10,349 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-14 12:09:10,350 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-14 12:09:10,350 INFO L153 SettingsManager]: * Use SBE=true [2024-06-14 12:09:10,351 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-14 12:09:10,351 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-14 12:09:10,351 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-14 12:09:10,351 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-14 12:09:10,351 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-14 12:09:10,352 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-14 12:09:10,352 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-14 12:09:10,352 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-14 12:09:10,352 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-14 12:09:10,353 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-14 12:09:10,353 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-14 12:09:10,353 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-14 12:09:10,353 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-14 12:09:10,354 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-14 12:09:10,354 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-14 12:09:10,355 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-14 12:09:10,355 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-14 12:09:10,355 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-14 12:09:10,355 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-14 12:09:10,355 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-14 12:09:10,355 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-14 12:09:10,356 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-14 12:09:10,356 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-14 12:09:10,356 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-14 12:09:10,356 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-14 12:09:10,356 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-14 12:09:10,357 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-14 12:09:10,357 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-14 12:09:10,357 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-14 12:09:10,563 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-14 12:09:10,584 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-14 12:09:10,586 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-14 12:09:10,587 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-14 12:09:10,588 INFO L274 PluginConnector]: CDTParser initialized [2024-06-14 12:09:10,588 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/mix023_power.opt_pso.opt_rmo.opt.i [2024-06-14 12:09:11,640 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-14 12:09:11,859 INFO L384 CDTParser]: Found 1 translation units. [2024-06-14 12:09:11,860 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/mix023_power.opt_pso.opt_rmo.opt.i [2024-06-14 12:09:11,870 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/71246b0d8/1da6796c459345bf92563def91bbec0e/FLAG7c154000b [2024-06-14 12:09:11,883 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/71246b0d8/1da6796c459345bf92563def91bbec0e [2024-06-14 12:09:11,885 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-14 12:09:11,886 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-14 12:09:11,888 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-05-21_14-57-05.files/protection/mix023_power.opt_pso.opt_rmo.opt.yml/witness.yml [2024-06-14 12:09:12,090 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-14 12:09:12,091 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-14 12:09:12,092 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-14 12:09:12,092 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-14 12:09:12,095 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-14 12:09:12,096 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.06 12:09:11" (1/2) ... [2024-06-14 12:09:12,097 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1dd49990 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 12:09:12, skipping insertion in model container [2024-06-14 12:09:12,097 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.06 12:09:11" (1/2) ... [2024-06-14 12:09:12,098 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@5510a721 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 12:09:12, skipping insertion in model container [2024-06-14 12:09:12,099 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 14.06 12:09:12" (2/2) ... [2024-06-14 12:09:12,099 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1dd49990 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 12:09:12, skipping insertion in model container [2024-06-14 12:09:12,099 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 14.06 12:09:12" (2/2) ... [2024-06-14 12:09:12,099 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-14 12:09:12,196 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-14 12:09:12,197 INFO L97 edCorrectnessWitness]: Location invariant before [L864-L864] ((((((((((((((((((((((! multithreaded || ((0 <= y$w_buff0 && y$w_buff0 <= 1) && (y$w_buff0 == 0 || y$w_buff0 == 1))) && (! multithreaded || ((0 <= y$mem_tmp && y$mem_tmp <= 1) && (y$mem_tmp == 0 || y$mem_tmp == 1)))) && (! multithreaded || y$read_delayed_var == 0)) && (! multithreaded || (((0 <= z && z <= 2) && z <= 127) && ((z == 0 || z == 1) || z == 2)))) && (! multithreaded || y$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p1_EBX && __unbuffered_p1_EBX <= 1) && (__unbuffered_p1_EBX == 0 || __unbuffered_p1_EBX == 1)))) && (! multithreaded || (((0 <= x && x <= 2) && x <= 127) && ((x == 0 || x == 1) || x == 2)))) && (! multithreaded || (((0 <= __unbuffered_p1_EAX && __unbuffered_p1_EAX <= 2) && __unbuffered_p1_EAX <= 127) && ((__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1) || __unbuffered_p1_EAX == 2)))) && (! multithreaded || y$r_buff1_thd4 == (_Bool)0)) && (! multithreaded || ((0 <= a && a <= 1) && (a == 0 || a == 1)))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1)))) && (! multithreaded || y$flush_delayed == (_Bool)0)) && (! multithreaded || y$read_delayed == (_Bool)0)) && (! multithreaded || y$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || (((0 <= __unbuffered_p3_EAX && __unbuffered_p3_EAX <= 2) && __unbuffered_p3_EAX <= 127) && ((__unbuffered_p3_EAX == 0 || __unbuffered_p3_EAX == 1) || __unbuffered_p3_EAX == 2)))) && (! multithreaded || ((0 <= y$w_buff1 && y$w_buff1 <= 1) && (y$w_buff1 == 0 || y$w_buff1 == 1)))) && (! multithreaded || ((0 <= __unbuffered_p3_EBX && __unbuffered_p3_EBX <= 1) && (__unbuffered_p3_EBX == 0 || __unbuffered_p3_EBX == 1)))) && (! multithreaded || y$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd4 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd0 == (_Bool)0) [2024-06-14 12:09:12,198 INFO L97 edCorrectnessWitness]: Location invariant before [L866-L866] ((((((((((((((((((((((! multithreaded || ((0 <= y$w_buff0 && y$w_buff0 <= 1) && (y$w_buff0 == 0 || y$w_buff0 == 1))) && (! multithreaded || ((0 <= y$mem_tmp && y$mem_tmp <= 1) && (y$mem_tmp == 0 || y$mem_tmp == 1)))) && (! multithreaded || y$read_delayed_var == 0)) && (! multithreaded || (((0 <= z && z <= 2) && z <= 127) && ((z == 0 || z == 1) || z == 2)))) && (! multithreaded || y$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p1_EBX && __unbuffered_p1_EBX <= 1) && (__unbuffered_p1_EBX == 0 || __unbuffered_p1_EBX == 1)))) && (! multithreaded || (((0 <= x && x <= 2) && x <= 127) && ((x == 0 || x == 1) || x == 2)))) && (! multithreaded || (((0 <= __unbuffered_p1_EAX && __unbuffered_p1_EAX <= 2) && __unbuffered_p1_EAX <= 127) && ((__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1) || __unbuffered_p1_EAX == 2)))) && (! multithreaded || y$r_buff1_thd4 == (_Bool)0)) && (! multithreaded || ((0 <= a && a <= 1) && (a == 0 || a == 1)))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1)))) && (! multithreaded || y$flush_delayed == (_Bool)0)) && (! multithreaded || y$read_delayed == (_Bool)0)) && (! multithreaded || y$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || (((0 <= __unbuffered_p3_EAX && __unbuffered_p3_EAX <= 2) && __unbuffered_p3_EAX <= 127) && ((__unbuffered_p3_EAX == 0 || __unbuffered_p3_EAX == 1) || __unbuffered_p3_EAX == 2)))) && (! multithreaded || ((0 <= y$w_buff1 && y$w_buff1 <= 1) && (y$w_buff1 == 0 || y$w_buff1 == 1)))) && (! multithreaded || ((0 <= __unbuffered_p3_EBX && __unbuffered_p3_EBX <= 1) && (__unbuffered_p3_EBX == 0 || __unbuffered_p3_EBX == 1)))) && (! multithreaded || y$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd4 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd0 == (_Bool)0) [2024-06-14 12:09:12,198 INFO L97 edCorrectnessWitness]: Location invariant before [L867-L867] ((((((((((((((((((((((! multithreaded || ((0 <= y$w_buff0 && y$w_buff0 <= 1) && (y$w_buff0 == 0 || y$w_buff0 == 1))) && (! multithreaded || ((0 <= y$mem_tmp && y$mem_tmp <= 1) && (y$mem_tmp == 0 || y$mem_tmp == 1)))) && (! multithreaded || y$read_delayed_var == 0)) && (! multithreaded || (((0 <= z && z <= 2) && z <= 127) && ((z == 0 || z == 1) || z == 2)))) && (! multithreaded || y$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p1_EBX && __unbuffered_p1_EBX <= 1) && (__unbuffered_p1_EBX == 0 || __unbuffered_p1_EBX == 1)))) && (! multithreaded || (((0 <= x && x <= 2) && x <= 127) && ((x == 0 || x == 1) || x == 2)))) && (! multithreaded || (((0 <= __unbuffered_p1_EAX && __unbuffered_p1_EAX <= 2) && __unbuffered_p1_EAX <= 127) && ((__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1) || __unbuffered_p1_EAX == 2)))) && (! multithreaded || y$r_buff1_thd4 == (_Bool)0)) && (! multithreaded || ((0 <= a && a <= 1) && (a == 0 || a == 1)))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1)))) && (! multithreaded || y$flush_delayed == (_Bool)0)) && (! multithreaded || y$read_delayed == (_Bool)0)) && (! multithreaded || y$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || (((0 <= __unbuffered_p3_EAX && __unbuffered_p3_EAX <= 2) && __unbuffered_p3_EAX <= 127) && ((__unbuffered_p3_EAX == 0 || __unbuffered_p3_EAX == 1) || __unbuffered_p3_EAX == 2)))) && (! multithreaded || ((0 <= y$w_buff1 && y$w_buff1 <= 1) && (y$w_buff1 == 0 || y$w_buff1 == 1)))) && (! multithreaded || ((0 <= __unbuffered_p3_EBX && __unbuffered_p3_EBX <= 1) && (__unbuffered_p3_EBX == 0 || __unbuffered_p3_EBX == 1)))) && (! multithreaded || y$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd4 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd0 == (_Bool)0) [2024-06-14 12:09:12,198 INFO L97 edCorrectnessWitness]: Location invariant before [L862-L862] ((((((((((((((((((((((! multithreaded || ((0 <= y$w_buff0 && y$w_buff0 <= 1) && (y$w_buff0 == 0 || y$w_buff0 == 1))) && (! multithreaded || ((0 <= y$mem_tmp && y$mem_tmp <= 1) && (y$mem_tmp == 0 || y$mem_tmp == 1)))) && (! multithreaded || y$read_delayed_var == 0)) && (! multithreaded || (((0 <= z && z <= 2) && z <= 127) && ((z == 0 || z == 1) || z == 2)))) && (! multithreaded || y$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p1_EBX && __unbuffered_p1_EBX <= 1) && (__unbuffered_p1_EBX == 0 || __unbuffered_p1_EBX == 1)))) && (! multithreaded || (((0 <= x && x <= 2) && x <= 127) && ((x == 0 || x == 1) || x == 2)))) && (! multithreaded || (((0 <= __unbuffered_p1_EAX && __unbuffered_p1_EAX <= 2) && __unbuffered_p1_EAX <= 127) && ((__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1) || __unbuffered_p1_EAX == 2)))) && (! multithreaded || y$r_buff1_thd4 == (_Bool)0)) && (! multithreaded || ((0 <= a && a <= 1) && (a == 0 || a == 1)))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1)))) && (! multithreaded || y$flush_delayed == (_Bool)0)) && (! multithreaded || y$read_delayed == (_Bool)0)) && (! multithreaded || y$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || (((0 <= __unbuffered_p3_EAX && __unbuffered_p3_EAX <= 2) && __unbuffered_p3_EAX <= 127) && ((__unbuffered_p3_EAX == 0 || __unbuffered_p3_EAX == 1) || __unbuffered_p3_EAX == 2)))) && (! multithreaded || ((0 <= y$w_buff1 && y$w_buff1 <= 1) && (y$w_buff1 == 0 || y$w_buff1 == 1)))) && (! multithreaded || ((0 <= __unbuffered_p3_EBX && __unbuffered_p3_EBX <= 1) && (__unbuffered_p3_EBX == 0 || __unbuffered_p3_EBX == 1)))) && (! multithreaded || y$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd4 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd0 == (_Bool)0) [2024-06-14 12:09:12,198 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-14 12:09:12,199 INFO L106 edCorrectnessWitness]: ghost_update [L860-L860] multithreaded = 1; [2024-06-14 12:09:12,235 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-14 12:09:12,576 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-14 12:09:12,589 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-14 12:09:12,721 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-14 12:09:12,760 INFO L206 MainTranslator]: Completed translation [2024-06-14 12:09:12,761 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 12:09:12 WrapperNode [2024-06-14 12:09:12,761 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-14 12:09:12,762 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-14 12:09:12,762 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-14 12:09:12,762 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-14 12:09:12,768 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 14.06 12:09:12" (1/1) ... [2024-06-14 12:09:12,796 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 14.06 12:09:12" (1/1) ... [2024-06-14 12:09:12,830 INFO L138 Inliner]: procedures = 176, calls = 56, calls flagged for inlining = 6, calls inlined = 7, statements flattened = 139 [2024-06-14 12:09:12,831 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-14 12:09:12,832 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-14 12:09:12,832 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-14 12:09:12,832 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-14 12:09:12,840 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 12:09:12" (1/1) ... [2024-06-14 12:09:12,841 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 12:09:12" (1/1) ... [2024-06-14 12:09:12,853 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 12:09:12" (1/1) ... [2024-06-14 12:09:12,880 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]. [2024-06-14 12:09:12,881 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 12:09:12" (1/1) ... [2024-06-14 12:09:12,881 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 12:09:12" (1/1) ... [2024-06-14 12:09:12,909 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 12:09:12" (1/1) ... [2024-06-14 12:09:12,911 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 12:09:12" (1/1) ... [2024-06-14 12:09:12,913 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 12:09:12" (1/1) ... [2024-06-14 12:09:12,914 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 12:09:12" (1/1) ... [2024-06-14 12:09:12,917 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-14 12:09:12,917 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-14 12:09:12,917 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-14 12:09:12,917 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-14 12:09:12,918 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 12:09:12" (1/1) ... [2024-06-14 12:09:12,924 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-14 12:09:12,929 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-14 12:09:12,941 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) [2024-06-14 12:09:12,947 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 [2024-06-14 12:09:12,967 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-14 12:09:12,967 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-14 12:09:12,967 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-14 12:09:12,967 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-14 12:09:12,967 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-14 12:09:12,968 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-14 12:09:12,968 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-14 12:09:12,968 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-14 12:09:12,968 INFO L130 BoogieDeclarations]: Found specification of procedure P3 [2024-06-14 12:09:12,968 INFO L138 BoogieDeclarations]: Found implementation of procedure P3 [2024-06-14 12:09:12,968 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-14 12:09:12,968 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-14 12:09:12,968 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-14 12:09:12,969 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-14 12:09:12,970 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-14 12:09:13,139 INFO L244 CfgBuilder]: Building ICFG [2024-06-14 12:09:13,142 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-14 12:09:13,548 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-14 12:09:13,548 INFO L293 CfgBuilder]: Performing block encoding [2024-06-14 12:09:13,690 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-14 12:09:13,690 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-14 12:09:13,691 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.06 12:09:13 BoogieIcfgContainer [2024-06-14 12:09:13,691 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-14 12:09:13,693 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-14 12:09:13,693 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-14 12:09:13,695 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-14 12:09:13,695 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.06 12:09:11" (1/4) ... [2024-06-14 12:09:13,696 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2e35d28 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.06 12:09:13, skipping insertion in model container [2024-06-14 12:09:13,696 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 14.06 12:09:12" (2/4) ... [2024-06-14 12:09:13,696 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2e35d28 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 14.06 12:09:13, skipping insertion in model container [2024-06-14 12:09:13,696 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 12:09:12" (3/4) ... [2024-06-14 12:09:13,696 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2e35d28 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 14.06 12:09:13, skipping insertion in model container [2024-06-14 12:09:13,697 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.06 12:09:13" (4/4) ... [2024-06-14 12:09:13,697 INFO L112 eAbstractionObserver]: Analyzing ICFG mix023_power.opt_pso.opt_rmo.opt.i [2024-06-14 12:09:13,710 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-14 12:09:13,710 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 4 error locations. [2024-06-14 12:09:13,710 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-14 12:09:13,750 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-14 12:09:13,776 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 67 places, 54 transitions, 124 flow [2024-06-14 12:09:13,828 INFO L124 PetriNetUnfolderBase]: 0/50 cut-off events. [2024-06-14 12:09:13,828 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-14 12:09:13,831 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63 conditions, 50 events. 0/50 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 94 event pairs, 0 based on Foata normal form. 0/46 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2024-06-14 12:09:13,831 INFO L82 GeneralOperation]: Start removeDead. Operand has 67 places, 54 transitions, 124 flow [2024-06-14 12:09:13,851 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 57 places, 44 transitions, 100 flow [2024-06-14 12:09:13,876 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-14 12:09:13,882 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;@57fb9ef, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-14 12:09:13,882 INFO L358 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2024-06-14 12:09:13,892 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-14 12:09:13,892 INFO L124 PetriNetUnfolderBase]: 0/6 cut-off events. [2024-06-14 12:09:13,892 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-14 12:09:13,893 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:09:13,893 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-06-14 12:09:13,893 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)] === [2024-06-14 12:09:13,897 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:09:13,897 INFO L85 PathProgramCache]: Analyzing trace with hash -923982927, now seen corresponding path program 1 times [2024-06-14 12:09:13,905 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:09:13,906 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1131257599] [2024-06-14 12:09:13,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:09:13,907 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:09:14,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:09:14,766 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:09:14,767 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:09:14,767 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1131257599] [2024-06-14 12:09:14,768 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1131257599] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:09:14,768 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:09:14,768 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-14 12:09:14,769 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1846638869] [2024-06-14 12:09:14,770 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:09:14,776 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-14 12:09:14,780 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:09:14,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-14 12:09:14,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-14 12:09:14,836 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 54 [2024-06-14 12:09:14,838 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 44 transitions, 100 flow. Second operand has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:09:14,839 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:09:14,839 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 54 [2024-06-14 12:09:14,839 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:09:16,127 INFO L124 PetriNetUnfolderBase]: 8152/11700 cut-off events. [2024-06-14 12:09:16,128 INFO L125 PetriNetUnfolderBase]: For 177/177 co-relation queries the response was YES. [2024-06-14 12:09:16,147 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23189 conditions, 11700 events. 8152/11700 cut-off events. For 177/177 co-relation queries the response was YES. Maximal size of possible extension queue 435. Compared 67293 event pairs, 6174 based on Foata normal form. 1/11332 useless extension candidates. Maximal degree in co-relation 23173. Up to 11108 conditions per place. [2024-06-14 12:09:16,199 INFO L140 encePairwiseOnDemand]: 45/54 looper letters, 44 selfloop transitions, 5 changer transitions 0/58 dead transitions. [2024-06-14 12:09:16,199 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 58 transitions, 235 flow [2024-06-14 12:09:16,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-14 12:09:16,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-14 12:09:16,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 101 transitions. [2024-06-14 12:09:16,210 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6234567901234568 [2024-06-14 12:09:16,211 INFO L175 Difference]: Start difference. First operand has 57 places, 44 transitions, 100 flow. Second operand 3 states and 101 transitions. [2024-06-14 12:09:16,212 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 58 transitions, 235 flow [2024-06-14 12:09:16,214 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 58 transitions, 228 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-06-14 12:09:16,218 INFO L231 Difference]: Finished difference. Result has 56 places, 48 transitions, 135 flow [2024-06-14 12:09:16,220 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=96, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=135, PETRI_PLACES=56, PETRI_TRANSITIONS=48} [2024-06-14 12:09:16,222 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, -1 predicate places. [2024-06-14 12:09:16,222 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 48 transitions, 135 flow [2024-06-14 12:09:16,223 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:09:16,223 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:09:16,223 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:09:16,223 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-14 12:09:16,224 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)] === [2024-06-14 12:09:16,224 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:09:16,224 INFO L85 PathProgramCache]: Analyzing trace with hash 1110693520, now seen corresponding path program 1 times [2024-06-14 12:09:16,224 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:09:16,225 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1118902482] [2024-06-14 12:09:16,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:09:16,225 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:09:16,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:09:16,938 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:09:16,939 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:09:16,939 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1118902482] [2024-06-14 12:09:16,939 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1118902482] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:09:16,940 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:09:16,940 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-14 12:09:16,940 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1839719762] [2024-06-14 12:09:16,940 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:09:16,941 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-14 12:09:16,941 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:09:16,942 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-14 12:09:16,942 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-14 12:09:17,005 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 54 [2024-06-14 12:09:17,005 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 48 transitions, 135 flow. Second operand has 4 states, 4 states have (on average 16.75) internal successors, (67), 4 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:09:17,006 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:09:17,006 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 54 [2024-06-14 12:09:17,006 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:09:18,326 INFO L124 PetriNetUnfolderBase]: 9537/13297 cut-off events. [2024-06-14 12:09:18,327 INFO L125 PetriNetUnfolderBase]: For 2501/2501 co-relation queries the response was YES. [2024-06-14 12:09:18,345 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30062 conditions, 13297 events. 9537/13297 cut-off events. For 2501/2501 co-relation queries the response was YES. Maximal size of possible extension queue 487. Compared 73935 event pairs, 6489 based on Foata normal form. 4/13292 useless extension candidates. Maximal degree in co-relation 30047. Up to 12918 conditions per place. [2024-06-14 12:09:18,492 INFO L140 encePairwiseOnDemand]: 44/54 looper letters, 55 selfloop transitions, 9 changer transitions 0/72 dead transitions. [2024-06-14 12:09:18,492 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 72 transitions, 329 flow [2024-06-14 12:09:18,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-14 12:09:18,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-14 12:09:18,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 128 transitions. [2024-06-14 12:09:18,496 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5925925925925926 [2024-06-14 12:09:18,496 INFO L175 Difference]: Start difference. First operand has 56 places, 48 transitions, 135 flow. Second operand 4 states and 128 transitions. [2024-06-14 12:09:18,497 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 72 transitions, 329 flow [2024-06-14 12:09:18,498 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 72 transitions, 324 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-14 12:09:18,500 INFO L231 Difference]: Finished difference. Result has 59 places, 52 transitions, 183 flow [2024-06-14 12:09:18,500 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=130, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=183, PETRI_PLACES=59, PETRI_TRANSITIONS=52} [2024-06-14 12:09:18,501 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 2 predicate places. [2024-06-14 12:09:18,501 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 52 transitions, 183 flow [2024-06-14 12:09:18,503 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.75) internal successors, (67), 4 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:09:18,503 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:09:18,503 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:09:18,503 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-14 12:09:18,504 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)] === [2024-06-14 12:09:18,509 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:09:18,510 INFO L85 PathProgramCache]: Analyzing trace with hash 71762566, now seen corresponding path program 1 times [2024-06-14 12:09:18,510 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:09:18,510 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1242490153] [2024-06-14 12:09:18,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:09:18,511 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:09:18,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:09:19,229 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:09:19,229 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:09:19,229 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1242490153] [2024-06-14 12:09:19,229 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1242490153] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:09:19,230 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:09:19,230 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-14 12:09:19,230 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1294708721] [2024-06-14 12:09:19,230 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:09:19,230 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-14 12:09:19,230 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:09:19,231 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-14 12:09:19,231 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-14 12:09:19,278 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 54 [2024-06-14 12:09:19,279 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 52 transitions, 183 flow. Second operand has 5 states, 5 states have (on average 15.6) internal successors, (78), 5 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:09:19,279 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:09:19,279 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 54 [2024-06-14 12:09:19,279 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:09:20,957 INFO L124 PetriNetUnfolderBase]: 11599/16109 cut-off events. [2024-06-14 12:09:20,957 INFO L125 PetriNetUnfolderBase]: For 8495/8495 co-relation queries the response was YES. [2024-06-14 12:09:20,982 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40232 conditions, 16109 events. 11599/16109 cut-off events. For 8495/8495 co-relation queries the response was YES. Maximal size of possible extension queue 568. Compared 89638 event pairs, 6384 based on Foata normal form. 7/16108 useless extension candidates. Maximal degree in co-relation 40215. Up to 15563 conditions per place. [2024-06-14 12:09:21,043 INFO L140 encePairwiseOnDemand]: 42/54 looper letters, 74 selfloop transitions, 21 changer transitions 0/102 dead transitions. [2024-06-14 12:09:21,044 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 102 transitions, 547 flow [2024-06-14 12:09:21,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 12:09:21,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 12:09:21,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 163 transitions. [2024-06-14 12:09:21,045 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6037037037037037 [2024-06-14 12:09:21,045 INFO L175 Difference]: Start difference. First operand has 59 places, 52 transitions, 183 flow. Second operand 5 states and 163 transitions. [2024-06-14 12:09:21,045 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 102 transitions, 547 flow [2024-06-14 12:09:21,048 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 102 transitions, 528 flow, removed 3 selfloop flow, removed 2 redundant places. [2024-06-14 12:09:21,050 INFO L231 Difference]: Finished difference. Result has 64 places, 66 transitions, 314 flow [2024-06-14 12:09:21,050 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=164, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=314, PETRI_PLACES=64, PETRI_TRANSITIONS=66} [2024-06-14 12:09:21,051 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 7 predicate places. [2024-06-14 12:09:21,051 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 66 transitions, 314 flow [2024-06-14 12:09:21,051 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.6) internal successors, (78), 5 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:09:21,051 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:09:21,051 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:09:21,051 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-14 12:09:21,051 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)] === [2024-06-14 12:09:21,052 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:09:21,052 INFO L85 PathProgramCache]: Analyzing trace with hash 244408261, now seen corresponding path program 1 times [2024-06-14 12:09:21,052 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:09:21,052 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1787685785] [2024-06-14 12:09:21,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:09:21,053 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:09:21,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:09:21,834 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:09:21,834 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:09:21,834 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1787685785] [2024-06-14 12:09:21,834 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1787685785] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:09:21,835 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:09:21,835 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 12:09:21,835 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [221921576] [2024-06-14 12:09:21,835 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:09:21,835 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 12:09:21,836 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:09:21,836 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 12:09:21,836 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-14 12:09:21,900 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 54 [2024-06-14 12:09:21,900 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 66 transitions, 314 flow. Second operand has 6 states, 6 states have (on average 15.5) internal successors, (93), 6 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:09:21,901 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:09:21,901 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 54 [2024-06-14 12:09:21,901 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:09:23,441 INFO L124 PetriNetUnfolderBase]: 11628/16136 cut-off events. [2024-06-14 12:09:23,442 INFO L125 PetriNetUnfolderBase]: For 20300/20306 co-relation queries the response was YES. [2024-06-14 12:09:23,465 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46758 conditions, 16136 events. 11628/16136 cut-off events. For 20300/20306 co-relation queries the response was YES. Maximal size of possible extension queue 568. Compared 89454 event pairs, 5283 based on Foata normal form. 18/16146 useless extension candidates. Maximal degree in co-relation 46738. Up to 15528 conditions per place. [2024-06-14 12:09:23,522 INFO L140 encePairwiseOnDemand]: 42/54 looper letters, 81 selfloop transitions, 25 changer transitions 0/113 dead transitions. [2024-06-14 12:09:23,522 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 113 transitions, 692 flow [2024-06-14 12:09:23,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 12:09:23,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 12:09:23,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 188 transitions. [2024-06-14 12:09:23,524 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5802469135802469 [2024-06-14 12:09:23,524 INFO L175 Difference]: Start difference. First operand has 64 places, 66 transitions, 314 flow. Second operand 6 states and 188 transitions. [2024-06-14 12:09:23,524 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 113 transitions, 692 flow [2024-06-14 12:09:23,529 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 113 transitions, 680 flow, removed 6 selfloop flow, removed 0 redundant places. [2024-06-14 12:09:23,530 INFO L231 Difference]: Finished difference. Result has 69 places, 69 transitions, 391 flow [2024-06-14 12:09:23,530 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=294, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=391, PETRI_PLACES=69, PETRI_TRANSITIONS=69} [2024-06-14 12:09:23,530 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 12 predicate places. [2024-06-14 12:09:23,531 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 69 transitions, 391 flow [2024-06-14 12:09:23,531 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.5) internal successors, (93), 6 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:09:23,531 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:09:23,531 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:09:23,531 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-14 12:09:23,531 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)] === [2024-06-14 12:09:23,532 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:09:23,532 INFO L85 PathProgramCache]: Analyzing trace with hash -991140726, now seen corresponding path program 1 times [2024-06-14 12:09:23,532 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:09:23,532 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1112131007] [2024-06-14 12:09:23,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:09:23,532 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:09:23,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:09:24,267 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:09:24,268 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:09:24,268 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1112131007] [2024-06-14 12:09:24,268 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1112131007] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:09:24,268 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:09:24,268 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 12:09:24,269 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1327760419] [2024-06-14 12:09:24,269 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:09:24,269 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 12:09:24,269 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:09:24,270 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 12:09:24,270 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-14 12:09:24,335 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 54 [2024-06-14 12:09:24,335 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 69 transitions, 391 flow. Second operand has 6 states, 6 states have (on average 15.666666666666666) internal successors, (94), 6 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) [2024-06-14 12:09:24,335 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:09:24,335 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 54 [2024-06-14 12:09:24,335 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:09:26,011 INFO L124 PetriNetUnfolderBase]: 9927/14146 cut-off events. [2024-06-14 12:09:26,011 INFO L125 PetriNetUnfolderBase]: For 25834/25834 co-relation queries the response was YES. [2024-06-14 12:09:26,062 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44270 conditions, 14146 events. 9927/14146 cut-off events. For 25834/25834 co-relation queries the response was YES. Maximal size of possible extension queue 510. Compared 81264 event pairs, 5267 based on Foata normal form. 3/13948 useless extension candidates. Maximal degree in co-relation 44247. Up to 13472 conditions per place. [2024-06-14 12:09:26,133 INFO L140 encePairwiseOnDemand]: 44/54 looper letters, 68 selfloop transitions, 10 changer transitions 0/86 dead transitions. [2024-06-14 12:09:26,133 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 86 transitions, 591 flow [2024-06-14 12:09:26,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 12:09:26,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 12:09:26,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 133 transitions. [2024-06-14 12:09:26,138 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4925925925925926 [2024-06-14 12:09:26,138 INFO L175 Difference]: Start difference. First operand has 69 places, 69 transitions, 391 flow. Second operand 5 states and 133 transitions. [2024-06-14 12:09:26,138 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 86 transitions, 591 flow [2024-06-14 12:09:26,145 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 86 transitions, 522 flow, removed 12 selfloop flow, removed 4 redundant places. [2024-06-14 12:09:26,148 INFO L231 Difference]: Finished difference. Result has 70 places, 69 transitions, 353 flow [2024-06-14 12:09:26,149 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=322, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=353, PETRI_PLACES=70, PETRI_TRANSITIONS=69} [2024-06-14 12:09:26,151 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 13 predicate places. [2024-06-14 12:09:26,151 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 69 transitions, 353 flow [2024-06-14 12:09:26,151 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.666666666666666) internal successors, (94), 6 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) [2024-06-14 12:09:26,151 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:09:26,152 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:09:26,152 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-14 12:09:26,152 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)] === [2024-06-14 12:09:26,152 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:09:26,152 INFO L85 PathProgramCache]: Analyzing trace with hash -690141174, now seen corresponding path program 1 times [2024-06-14 12:09:26,153 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:09:26,153 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [448076573] [2024-06-14 12:09:26,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:09:26,153 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:09:26,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:09:27,117 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:09:27,118 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:09:27,118 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [448076573] [2024-06-14 12:09:27,118 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [448076573] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:09:27,118 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:09:27,118 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 12:09:27,118 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [647929390] [2024-06-14 12:09:27,119 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:09:27,119 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 12:09:27,119 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:09:27,119 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 12:09:27,120 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-14 12:09:27,202 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 54 [2024-06-14 12:09:27,203 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 69 transitions, 353 flow. Second operand has 7 states, 7 states have (on average 15.571428571428571) internal successors, (109), 7 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:09:27,203 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:09:27,203 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 54 [2024-06-14 12:09:27,203 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:09:28,967 INFO L124 PetriNetUnfolderBase]: 9909/14152 cut-off events. [2024-06-14 12:09:28,967 INFO L125 PetriNetUnfolderBase]: For 29871/29871 co-relation queries the response was YES. [2024-06-14 12:09:28,990 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44942 conditions, 14152 events. 9909/14152 cut-off events. For 29871/29871 co-relation queries the response was YES. Maximal size of possible extension queue 506. Compared 81364 event pairs, 5029 based on Foata normal form. 6/13946 useless extension candidates. Maximal degree in co-relation 44917. Up to 13418 conditions per place. [2024-06-14 12:09:29,060 INFO L140 encePairwiseOnDemand]: 43/54 looper letters, 76 selfloop transitions, 14 changer transitions 0/98 dead transitions. [2024-06-14 12:09:29,060 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 98 transitions, 625 flow [2024-06-14 12:09:29,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 12:09:29,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 12:09:29,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 159 transitions. [2024-06-14 12:09:29,063 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49074074074074076 [2024-06-14 12:09:29,063 INFO L175 Difference]: Start difference. First operand has 70 places, 69 transitions, 353 flow. Second operand 6 states and 159 transitions. [2024-06-14 12:09:29,063 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 98 transitions, 625 flow [2024-06-14 12:09:29,070 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 98 transitions, 596 flow, removed 3 selfloop flow, removed 4 redundant places. [2024-06-14 12:09:29,071 INFO L231 Difference]: Finished difference. Result has 72 places, 73 transitions, 399 flow [2024-06-14 12:09:29,071 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=324, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=399, PETRI_PLACES=72, PETRI_TRANSITIONS=73} [2024-06-14 12:09:29,074 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 15 predicate places. [2024-06-14 12:09:29,074 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 73 transitions, 399 flow [2024-06-14 12:09:29,074 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.571428571428571) internal successors, (109), 7 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:09:29,074 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:09:29,074 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:09:29,075 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-14 12:09:29,075 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)] === [2024-06-14 12:09:29,075 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:09:29,075 INFO L85 PathProgramCache]: Analyzing trace with hash 74739271, now seen corresponding path program 1 times [2024-06-14 12:09:29,075 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:09:29,078 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [279743608] [2024-06-14 12:09:29,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:09:29,079 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:09:29,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:09:29,891 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:09:29,892 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:09:29,892 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [279743608] [2024-06-14 12:09:29,893 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [279743608] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:09:29,893 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:09:29,893 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 12:09:29,893 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1974389] [2024-06-14 12:09:29,893 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:09:29,893 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 12:09:29,894 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:09:29,894 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 12:09:29,894 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-14 12:09:30,027 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 54 [2024-06-14 12:09:30,027 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 73 transitions, 399 flow. Second operand has 7 states, 7 states have (on average 14.571428571428571) internal successors, (102), 7 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) [2024-06-14 12:09:30,027 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:09:30,027 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 54 [2024-06-14 12:09:30,028 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:09:31,736 INFO L124 PetriNetUnfolderBase]: 11614/16098 cut-off events. [2024-06-14 12:09:31,737 INFO L125 PetriNetUnfolderBase]: For 47524/47536 co-relation queries the response was YES. [2024-06-14 12:09:31,793 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55384 conditions, 16098 events. 11614/16098 cut-off events. For 47524/47536 co-relation queries the response was YES. Maximal size of possible extension queue 565. Compared 89074 event pairs, 6127 based on Foata normal form. 14/16106 useless extension candidates. Maximal degree in co-relation 55359. Up to 15582 conditions per place. [2024-06-14 12:09:32,103 INFO L140 encePairwiseOnDemand]: 42/54 looper letters, 75 selfloop transitions, 25 changer transitions 0/107 dead transitions. [2024-06-14 12:09:32,103 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 107 transitions, 742 flow [2024-06-14 12:09:32,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 12:09:32,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 12:09:32,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 163 transitions. [2024-06-14 12:09:32,105 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5030864197530864 [2024-06-14 12:09:32,105 INFO L175 Difference]: Start difference. First operand has 72 places, 73 transitions, 399 flow. Second operand 6 states and 163 transitions. [2024-06-14 12:09:32,105 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 107 transitions, 742 flow [2024-06-14 12:09:32,114 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 107 transitions, 699 flow, removed 10 selfloop flow, removed 4 redundant places. [2024-06-14 12:09:32,118 INFO L231 Difference]: Finished difference. Result has 74 places, 77 transitions, 452 flow [2024-06-14 12:09:32,119 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=356, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=452, PETRI_PLACES=74, PETRI_TRANSITIONS=77} [2024-06-14 12:09:32,120 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 17 predicate places. [2024-06-14 12:09:32,120 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 77 transitions, 452 flow [2024-06-14 12:09:32,120 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.571428571428571) internal successors, (102), 7 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) [2024-06-14 12:09:32,120 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:09:32,120 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:09:32,120 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-14 12:09:32,120 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)] === [2024-06-14 12:09:32,121 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:09:32,121 INFO L85 PathProgramCache]: Analyzing trace with hash 996526441, now seen corresponding path program 2 times [2024-06-14 12:09:32,121 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:09:32,121 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [422950234] [2024-06-14 12:09:32,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:09:32,122 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:09:32,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:09:32,927 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:09:32,927 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:09:32,927 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [422950234] [2024-06-14 12:09:32,927 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [422950234] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:09:32,927 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:09:32,928 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 12:09:32,928 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1969176381] [2024-06-14 12:09:32,928 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:09:32,928 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 12:09:32,928 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:09:32,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 12:09:32,929 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-14 12:09:33,003 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 54 [2024-06-14 12:09:33,003 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 77 transitions, 452 flow. Second operand has 7 states, 7 states have (on average 14.571428571428571) internal successors, (102), 7 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) [2024-06-14 12:09:33,003 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:09:33,003 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 54 [2024-06-14 12:09:33,003 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:09:34,791 INFO L124 PetriNetUnfolderBase]: 11590/16050 cut-off events. [2024-06-14 12:09:34,792 INFO L125 PetriNetUnfolderBase]: For 55595/55601 co-relation queries the response was YES. [2024-06-14 12:09:34,832 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56536 conditions, 16050 events. 11590/16050 cut-off events. For 55595/55601 co-relation queries the response was YES. Maximal size of possible extension queue 565. Compared 88622 event pairs, 6147 based on Foata normal form. 4/16041 useless extension candidates. Maximal degree in co-relation 56510. Up to 15552 conditions per place. [2024-06-14 12:09:34,897 INFO L140 encePairwiseOnDemand]: 42/54 looper letters, 68 selfloop transitions, 26 changer transitions 0/101 dead transitions. [2024-06-14 12:09:34,898 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 101 transitions, 702 flow [2024-06-14 12:09:34,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 12:09:34,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 12:09:34,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 158 transitions. [2024-06-14 12:09:34,899 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4876543209876543 [2024-06-14 12:09:34,900 INFO L175 Difference]: Start difference. First operand has 74 places, 77 transitions, 452 flow. Second operand 6 states and 158 transitions. [2024-06-14 12:09:34,900 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 101 transitions, 702 flow [2024-06-14 12:09:34,921 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 101 transitions, 659 flow, removed 7 selfloop flow, removed 3 redundant places. [2024-06-14 12:09:34,922 INFO L231 Difference]: Finished difference. Result has 77 places, 77 transitions, 472 flow [2024-06-14 12:09:34,922 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=409, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=472, PETRI_PLACES=77, PETRI_TRANSITIONS=77} [2024-06-14 12:09:34,924 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 20 predicate places. [2024-06-14 12:09:34,924 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 77 transitions, 472 flow [2024-06-14 12:09:34,924 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.571428571428571) internal successors, (102), 7 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) [2024-06-14 12:09:34,925 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:09:34,925 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:09:34,925 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-14 12:09:34,925 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)] === [2024-06-14 12:09:34,925 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:09:34,925 INFO L85 PathProgramCache]: Analyzing trace with hash -1638599925, now seen corresponding path program 1 times [2024-06-14 12:09:34,926 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:09:34,926 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1758152856] [2024-06-14 12:09:34,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:09:34,926 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:09:34,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:09:35,819 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:09:35,819 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:09:35,820 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1758152856] [2024-06-14 12:09:35,820 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1758152856] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:09:35,820 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:09:35,820 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:09:35,820 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [653632126] [2024-06-14 12:09:35,820 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:09:35,820 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:09:35,820 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:09:35,821 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:09:35,821 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:09:35,928 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 54 [2024-06-14 12:09:35,928 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 77 transitions, 472 flow. Second operand has 8 states, 8 states have (on average 14.5) internal successors, (116), 8 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:09:35,928 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:09:35,928 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 54 [2024-06-14 12:09:35,928 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:09:37,978 INFO L124 PetriNetUnfolderBase]: 11956/16467 cut-off events. [2024-06-14 12:09:37,978 INFO L125 PetriNetUnfolderBase]: For 68491/68497 co-relation queries the response was YES. [2024-06-14 12:09:38,018 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60053 conditions, 16467 events. 11956/16467 cut-off events. For 68491/68497 co-relation queries the response was YES. Maximal size of possible extension queue 548. Compared 89908 event pairs, 5439 based on Foata normal form. 13/16471 useless extension candidates. Maximal degree in co-relation 60026. Up to 15618 conditions per place. [2024-06-14 12:09:38,075 INFO L140 encePairwiseOnDemand]: 38/54 looper letters, 105 selfloop transitions, 55 changer transitions 0/167 dead transitions. [2024-06-14 12:09:38,076 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 167 transitions, 1352 flow [2024-06-14 12:09:38,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:09:38,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:09:38,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 225 transitions. [2024-06-14 12:09:38,077 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5208333333333334 [2024-06-14 12:09:38,077 INFO L175 Difference]: Start difference. First operand has 77 places, 77 transitions, 472 flow. Second operand 8 states and 225 transitions. [2024-06-14 12:09:38,077 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 167 transitions, 1352 flow [2024-06-14 12:09:38,102 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 167 transitions, 1189 flow, removed 8 selfloop flow, removed 6 redundant places. [2024-06-14 12:09:38,104 INFO L231 Difference]: Finished difference. Result has 82 places, 110 transitions, 793 flow [2024-06-14 12:09:38,104 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=388, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=793, PETRI_PLACES=82, PETRI_TRANSITIONS=110} [2024-06-14 12:09:38,105 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 25 predicate places. [2024-06-14 12:09:38,105 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 110 transitions, 793 flow [2024-06-14 12:09:38,105 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.5) internal successors, (116), 8 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:09:38,105 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:09:38,105 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:09:38,105 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-14 12:09:38,106 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)] === [2024-06-14 12:09:38,106 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:09:38,106 INFO L85 PathProgramCache]: Analyzing trace with hash -93165271, now seen corresponding path program 2 times [2024-06-14 12:09:38,106 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:09:38,106 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1867012300] [2024-06-14 12:09:38,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:09:38,106 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:09:38,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:09:39,062 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:09:39,062 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:09:39,062 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1867012300] [2024-06-14 12:09:39,062 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1867012300] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:09:39,063 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:09:39,063 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:09:39,063 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1995969661] [2024-06-14 12:09:39,063 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:09:39,063 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:09:39,063 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:09:39,063 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:09:39,064 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:09:39,156 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 54 [2024-06-14 12:09:39,156 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 110 transitions, 793 flow. Second operand has 8 states, 8 states have (on average 14.5) internal successors, (116), 8 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:09:39,156 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:09:39,156 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 54 [2024-06-14 12:09:39,156 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:09:41,333 INFO L124 PetriNetUnfolderBase]: 12116/16713 cut-off events. [2024-06-14 12:09:41,334 INFO L125 PetriNetUnfolderBase]: For 90211/90220 co-relation queries the response was YES. [2024-06-14 12:09:41,366 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66603 conditions, 16713 events. 12116/16713 cut-off events. For 90211/90220 co-relation queries the response was YES. Maximal size of possible extension queue 548. Compared 91411 event pairs, 5479 based on Foata normal form. 24/16728 useless extension candidates. Maximal degree in co-relation 66572. Up to 15730 conditions per place. [2024-06-14 12:09:41,434 INFO L140 encePairwiseOnDemand]: 41/54 looper letters, 91 selfloop transitions, 65 changer transitions 0/163 dead transitions. [2024-06-14 12:09:41,434 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 163 transitions, 1403 flow [2024-06-14 12:09:41,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:09:41,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:09:41,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 193 transitions. [2024-06-14 12:09:41,436 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5105820105820106 [2024-06-14 12:09:41,436 INFO L175 Difference]: Start difference. First operand has 82 places, 110 transitions, 793 flow. Second operand 7 states and 193 transitions. [2024-06-14 12:09:41,436 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 163 transitions, 1403 flow [2024-06-14 12:09:41,479 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 163 transitions, 1362 flow, removed 14 selfloop flow, removed 2 redundant places. [2024-06-14 12:09:41,481 INFO L231 Difference]: Finished difference. Result has 87 places, 119 transitions, 1002 flow [2024-06-14 12:09:41,481 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=752, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=110, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1002, PETRI_PLACES=87, PETRI_TRANSITIONS=119} [2024-06-14 12:09:41,482 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 30 predicate places. [2024-06-14 12:09:41,482 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 119 transitions, 1002 flow [2024-06-14 12:09:41,482 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.5) internal successors, (116), 8 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:09:41,483 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:09:41,483 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:09:41,483 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-14 12:09:41,483 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)] === [2024-06-14 12:09:41,483 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:09:41,484 INFO L85 PathProgramCache]: Analyzing trace with hash 827549609, now seen corresponding path program 3 times [2024-06-14 12:09:41,484 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:09:41,484 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [580876462] [2024-06-14 12:09:41,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:09:41,484 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:09:41,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:09:42,435 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:09:42,436 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:09:42,436 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [580876462] [2024-06-14 12:09:42,436 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [580876462] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:09:42,436 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:09:42,436 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:09:42,437 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [400196592] [2024-06-14 12:09:42,437 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:09:42,437 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:09:42,437 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:09:42,438 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:09:42,438 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:09:42,573 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 54 [2024-06-14 12:09:42,573 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 119 transitions, 1002 flow. Second operand has 8 states, 8 states have (on average 14.5) internal successors, (116), 8 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:09:42,574 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:09:42,574 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 54 [2024-06-14 12:09:42,574 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:09:44,790 INFO L124 PetriNetUnfolderBase]: 12196/16813 cut-off events. [2024-06-14 12:09:44,791 INFO L125 PetriNetUnfolderBase]: For 106459/106469 co-relation queries the response was YES. [2024-06-14 12:09:44,845 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70029 conditions, 16813 events. 12196/16813 cut-off events. For 106459/106469 co-relation queries the response was YES. Maximal size of possible extension queue 548. Compared 91570 event pairs, 5482 based on Foata normal form. 13/16798 useless extension candidates. Maximal degree in co-relation 69996. Up to 15772 conditions per place. [2024-06-14 12:09:44,911 INFO L140 encePairwiseOnDemand]: 41/54 looper letters, 92 selfloop transitions, 79 changer transitions 0/178 dead transitions. [2024-06-14 12:09:44,911 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 178 transitions, 1802 flow [2024-06-14 12:09:44,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:09:44,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:09:44,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 195 transitions. [2024-06-14 12:09:44,913 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5158730158730159 [2024-06-14 12:09:44,913 INFO L175 Difference]: Start difference. First operand has 87 places, 119 transitions, 1002 flow. Second operand 7 states and 195 transitions. [2024-06-14 12:09:44,913 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 178 transitions, 1802 flow [2024-06-14 12:09:44,980 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 178 transitions, 1633 flow, removed 38 selfloop flow, removed 4 redundant places. [2024-06-14 12:09:44,982 INFO L231 Difference]: Finished difference. Result has 90 places, 133 transitions, 1211 flow [2024-06-14 12:09:44,983 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=861, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=119, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1211, PETRI_PLACES=90, PETRI_TRANSITIONS=133} [2024-06-14 12:09:44,983 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 33 predicate places. [2024-06-14 12:09:44,983 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 133 transitions, 1211 flow [2024-06-14 12:09:44,983 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.5) internal successors, (116), 8 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:09:44,984 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:09:44,984 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:09:44,984 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-14 12:09:44,984 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)] === [2024-06-14 12:09:44,984 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:09:44,984 INFO L85 PathProgramCache]: Analyzing trace with hash -1800680215, now seen corresponding path program 4 times [2024-06-14 12:09:44,984 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:09:44,985 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [350715056] [2024-06-14 12:09:44,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:09:44,985 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:09:44,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:09:45,812 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:09:45,812 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:09:45,812 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [350715056] [2024-06-14 12:09:45,812 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [350715056] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:09:45,813 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:09:45,813 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:09:45,813 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1794265811] [2024-06-14 12:09:45,813 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:09:45,813 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:09:45,814 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:09:45,815 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:09:45,815 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:09:45,895 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 54 [2024-06-14 12:09:45,896 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 133 transitions, 1211 flow. Second operand has 8 states, 8 states have (on average 14.5) internal successors, (116), 8 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:09:45,896 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:09:45,896 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 54 [2024-06-14 12:09:45,896 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:09:47,990 INFO L124 PetriNetUnfolderBase]: 12164/16775 cut-off events. [2024-06-14 12:09:47,990 INFO L125 PetriNetUnfolderBase]: For 107003/107019 co-relation queries the response was YES. [2024-06-14 12:09:48,042 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69498 conditions, 16775 events. 12164/16775 cut-off events. For 107003/107019 co-relation queries the response was YES. Maximal size of possible extension queue 548. Compared 91768 event pairs, 5458 based on Foata normal form. 19/16766 useless extension candidates. Maximal degree in co-relation 69464. Up to 15755 conditions per place. [2024-06-14 12:09:48,111 INFO L140 encePairwiseOnDemand]: 41/54 looper letters, 87 selfloop transitions, 81 changer transitions 0/175 dead transitions. [2024-06-14 12:09:48,111 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 175 transitions, 1749 flow [2024-06-14 12:09:48,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:09:48,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:09:48,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 191 transitions. [2024-06-14 12:09:48,113 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5052910052910053 [2024-06-14 12:09:48,113 INFO L175 Difference]: Start difference. First operand has 90 places, 133 transitions, 1211 flow. Second operand 7 states and 191 transitions. [2024-06-14 12:09:48,114 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 175 transitions, 1749 flow [2024-06-14 12:09:48,208 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 175 transitions, 1618 flow, removed 46 selfloop flow, removed 2 redundant places. [2024-06-14 12:09:48,214 INFO L231 Difference]: Finished difference. Result has 95 places, 133 transitions, 1256 flow [2024-06-14 12:09:48,214 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=1080, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=133, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=81, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1256, PETRI_PLACES=95, PETRI_TRANSITIONS=133} [2024-06-14 12:09:48,215 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 38 predicate places. [2024-06-14 12:09:48,215 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 133 transitions, 1256 flow [2024-06-14 12:09:48,215 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.5) internal successors, (116), 8 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:09:48,215 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:09:48,216 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:09:48,216 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-14 12:09:48,218 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 12:09:48,218 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:09:48,219 INFO L85 PathProgramCache]: Analyzing trace with hash 2030573241, now seen corresponding path program 1 times [2024-06-14 12:09:48,219 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:09:48,219 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [776362232] [2024-06-14 12:09:48,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:09:48,219 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:09:48,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:09:49,022 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:09:49,023 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:09:49,023 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [776362232] [2024-06-14 12:09:49,023 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [776362232] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:09:49,023 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:09:49,023 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 12:09:49,023 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1142978357] [2024-06-14 12:09:49,024 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:09:49,024 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 12:09:49,024 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:09:49,025 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 12:09:49,025 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-14 12:09:49,090 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 54 [2024-06-14 12:09:49,091 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 133 transitions, 1256 flow. Second operand has 6 states, 6 states have (on average 17.166666666666668) internal successors, (103), 6 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:09:49,091 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:09:49,091 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 54 [2024-06-14 12:09:49,091 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:09:50,570 INFO L124 PetriNetUnfolderBase]: 10025/14607 cut-off events. [2024-06-14 12:09:50,570 INFO L125 PetriNetUnfolderBase]: For 97389/97421 co-relation queries the response was YES. [2024-06-14 12:09:50,622 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60254 conditions, 14607 events. 10025/14607 cut-off events. For 97389/97421 co-relation queries the response was YES. Maximal size of possible extension queue 509. Compared 86660 event pairs, 4754 based on Foata normal form. 18/14424 useless extension candidates. Maximal degree in co-relation 60217. Up to 13476 conditions per place. [2024-06-14 12:09:50,682 INFO L140 encePairwiseOnDemand]: 45/54 looper letters, 126 selfloop transitions, 10 changer transitions 0/151 dead transitions. [2024-06-14 12:09:50,682 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 151 transitions, 1606 flow [2024-06-14 12:09:50,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 12:09:50,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 12:09:50,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 133 transitions. [2024-06-14 12:09:50,684 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4925925925925926 [2024-06-14 12:09:50,684 INFO L175 Difference]: Start difference. First operand has 95 places, 133 transitions, 1256 flow. Second operand 5 states and 133 transitions. [2024-06-14 12:09:50,684 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 151 transitions, 1606 flow [2024-06-14 12:09:50,761 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 151 transitions, 1399 flow, removed 5 selfloop flow, removed 7 redundant places. [2024-06-14 12:09:50,763 INFO L231 Difference]: Finished difference. Result has 93 places, 137 transitions, 1120 flow [2024-06-14 12:09:50,763 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=1049, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=133, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=123, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1120, PETRI_PLACES=93, PETRI_TRANSITIONS=137} [2024-06-14 12:09:50,763 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 36 predicate places. [2024-06-14 12:09:50,764 INFO L495 AbstractCegarLoop]: Abstraction has has 93 places, 137 transitions, 1120 flow [2024-06-14 12:09:50,764 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.166666666666668) internal successors, (103), 6 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:09:50,764 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:09:50,764 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:09:50,764 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-14 12:09:50,764 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 12:09:50,765 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:09:50,765 INFO L85 PathProgramCache]: Analyzing trace with hash -1189978047, now seen corresponding path program 1 times [2024-06-14 12:09:50,765 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:09:50,765 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1458096516] [2024-06-14 12:09:50,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:09:50,765 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:09:50,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:09:51,640 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:09:51,640 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:09:51,641 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1458096516] [2024-06-14 12:09:51,641 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1458096516] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:09:51,641 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:09:51,641 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:09:51,641 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1127853610] [2024-06-14 12:09:51,641 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:09:51,641 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:09:51,642 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:09:51,642 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:09:51,642 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:09:51,785 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 54 [2024-06-14 12:09:51,785 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 137 transitions, 1120 flow. Second operand has 8 states, 8 states have (on average 14.625) internal successors, (117), 8 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:09:51,785 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:09:51,786 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 54 [2024-06-14 12:09:51,786 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:09:53,935 INFO L124 PetriNetUnfolderBase]: 12245/17128 cut-off events. [2024-06-14 12:09:53,935 INFO L125 PetriNetUnfolderBase]: For 131675/131692 co-relation queries the response was YES. [2024-06-14 12:09:54,000 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74024 conditions, 17128 events. 12245/17128 cut-off events. For 131675/131692 co-relation queries the response was YES. Maximal size of possible extension queue 568. Compared 95591 event pairs, 5480 based on Foata normal form. 26/17145 useless extension candidates. Maximal degree in co-relation 73987. Up to 15822 conditions per place. [2024-06-14 12:09:54,073 INFO L140 encePairwiseOnDemand]: 41/54 looper letters, 99 selfloop transitions, 86 changer transitions 0/192 dead transitions. [2024-06-14 12:09:54,073 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 192 transitions, 1826 flow [2024-06-14 12:09:54,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:09:54,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:09:54,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 197 transitions. [2024-06-14 12:09:54,075 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5211640211640212 [2024-06-14 12:09:54,075 INFO L175 Difference]: Start difference. First operand has 93 places, 137 transitions, 1120 flow. Second operand 7 states and 197 transitions. [2024-06-14 12:09:54,075 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 192 transitions, 1826 flow [2024-06-14 12:09:54,165 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 192 transitions, 1785 flow, removed 13 selfloop flow, removed 3 redundant places. [2024-06-14 12:09:54,168 INFO L231 Difference]: Finished difference. Result has 97 places, 145 transitions, 1378 flow [2024-06-14 12:09:54,168 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=1079, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=137, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1378, PETRI_PLACES=97, PETRI_TRANSITIONS=145} [2024-06-14 12:09:54,169 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 40 predicate places. [2024-06-14 12:09:54,169 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 145 transitions, 1378 flow [2024-06-14 12:09:54,169 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.625) internal successors, (117), 8 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:09:54,169 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:09:54,169 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:09:54,169 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-14 12:09:54,169 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)] === [2024-06-14 12:09:54,170 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:09:54,170 INFO L85 PathProgramCache]: Analyzing trace with hash 1406844719, now seen corresponding path program 2 times [2024-06-14 12:09:54,170 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:09:54,170 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [124649467] [2024-06-14 12:09:54,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:09:54,170 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:09:54,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:09:55,155 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:09:55,156 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:09:55,156 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [124649467] [2024-06-14 12:09:55,156 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [124649467] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:09:55,156 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:09:55,156 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:09:55,156 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [120481809] [2024-06-14 12:09:55,156 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:09:55,156 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:09:55,156 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:09:55,157 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:09:55,157 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:09:55,267 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 54 [2024-06-14 12:09:55,267 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 145 transitions, 1378 flow. Second operand has 9 states, 9 states have (on average 14.444444444444445) internal successors, (130), 9 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:09:55,267 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:09:55,267 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 54 [2024-06-14 12:09:55,267 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:09:57,489 INFO L124 PetriNetUnfolderBase]: 12321/17240 cut-off events. [2024-06-14 12:09:57,489 INFO L125 PetriNetUnfolderBase]: For 150351/150360 co-relation queries the response was YES. [2024-06-14 12:09:57,559 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76790 conditions, 17240 events. 12321/17240 cut-off events. For 150351/150360 co-relation queries the response was YES. Maximal size of possible extension queue 568. Compared 96243 event pairs, 5481 based on Foata normal form. 16/17247 useless extension candidates. Maximal degree in co-relation 76752. Up to 15889 conditions per place. [2024-06-14 12:09:57,638 INFO L140 encePairwiseOnDemand]: 41/54 looper letters, 106 selfloop transitions, 93 changer transitions 0/206 dead transitions. [2024-06-14 12:09:57,638 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 206 transitions, 2156 flow [2024-06-14 12:09:57,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:09:57,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:09:57,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 218 transitions. [2024-06-14 12:09:57,656 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5046296296296297 [2024-06-14 12:09:57,656 INFO L175 Difference]: Start difference. First operand has 97 places, 145 transitions, 1378 flow. Second operand 8 states and 218 transitions. [2024-06-14 12:09:57,656 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 206 transitions, 2156 flow [2024-06-14 12:09:57,799 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 206 transitions, 1852 flow, removed 24 selfloop flow, removed 6 redundant places. [2024-06-14 12:09:57,803 INFO L231 Difference]: Finished difference. Result has 99 places, 153 transitions, 1404 flow [2024-06-14 12:09:57,803 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=1098, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=145, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=85, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1404, PETRI_PLACES=99, PETRI_TRANSITIONS=153} [2024-06-14 12:09:57,804 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 42 predicate places. [2024-06-14 12:09:57,804 INFO L495 AbstractCegarLoop]: Abstraction has has 99 places, 153 transitions, 1404 flow [2024-06-14 12:09:57,804 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.444444444444445) internal successors, (130), 9 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:09:57,804 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:09:57,804 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:09:57,805 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-14 12:09:57,805 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)] === [2024-06-14 12:09:57,805 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:09:57,805 INFO L85 PathProgramCache]: Analyzing trace with hash -1964075147, now seen corresponding path program 3 times [2024-06-14 12:09:57,805 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:09:57,805 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1078645725] [2024-06-14 12:09:57,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:09:57,806 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:09:57,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:09:58,832 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:09:58,832 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:09:58,832 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1078645725] [2024-06-14 12:09:58,832 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1078645725] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:09:58,832 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:09:58,832 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:09:58,832 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [94733634] [2024-06-14 12:09:58,833 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:09:58,833 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:09:58,833 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:09:58,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:09:58,833 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:09:58,945 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 54 [2024-06-14 12:09:58,945 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 153 transitions, 1404 flow. Second operand has 9 states, 9 states have (on average 14.444444444444445) internal successors, (130), 9 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:09:58,945 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:09:58,945 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 54 [2024-06-14 12:09:58,945 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:10:01,266 INFO L124 PetriNetUnfolderBase]: 12401/17344 cut-off events. [2024-06-14 12:10:01,266 INFO L125 PetriNetUnfolderBase]: For 165996/166006 co-relation queries the response was YES. [2024-06-14 12:10:01,311 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78523 conditions, 17344 events. 12401/17344 cut-off events. For 165996/166006 co-relation queries the response was YES. Maximal size of possible extension queue 568. Compared 96664 event pairs, 5492 based on Foata normal form. 13/17312 useless extension candidates. Maximal degree in co-relation 78485. Up to 15959 conditions per place. [2024-06-14 12:10:01,376 INFO L140 encePairwiseOnDemand]: 41/54 looper letters, 102 selfloop transitions, 103 changer transitions 0/212 dead transitions. [2024-06-14 12:10:01,376 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 212 transitions, 2188 flow [2024-06-14 12:10:01,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:10:01,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:10:01,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 217 transitions. [2024-06-14 12:10:01,378 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5023148148148148 [2024-06-14 12:10:01,378 INFO L175 Difference]: Start difference. First operand has 99 places, 153 transitions, 1404 flow. Second operand 8 states and 217 transitions. [2024-06-14 12:10:01,379 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 212 transitions, 2188 flow [2024-06-14 12:10:01,488 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 212 transitions, 2007 flow, removed 24 selfloop flow, removed 5 redundant places. [2024-06-14 12:10:01,490 INFO L231 Difference]: Finished difference. Result has 102 places, 161 transitions, 1564 flow [2024-06-14 12:10:01,491 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=1231, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=153, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=95, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1564, PETRI_PLACES=102, PETRI_TRANSITIONS=161} [2024-06-14 12:10:01,491 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 45 predicate places. [2024-06-14 12:10:01,491 INFO L495 AbstractCegarLoop]: Abstraction has has 102 places, 161 transitions, 1564 flow [2024-06-14 12:10:01,491 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.444444444444445) internal successors, (130), 9 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:10:01,491 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:10:01,491 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:10:01,492 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-14 12:10:01,492 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)] === [2024-06-14 12:10:01,492 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:10:01,492 INFO L85 PathProgramCache]: Analyzing trace with hash 857619427, now seen corresponding path program 4 times [2024-06-14 12:10:01,492 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:10:01,492 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1998040509] [2024-06-14 12:10:01,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:10:01,493 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:10:01,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:10:02,432 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:10:02,432 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:10:02,432 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1998040509] [2024-06-14 12:10:02,432 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1998040509] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:10:02,433 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:10:02,433 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:10:02,433 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1508779714] [2024-06-14 12:10:02,433 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:10:02,433 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:10:02,433 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:10:02,434 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:10:02,434 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:10:02,553 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 54 [2024-06-14 12:10:02,553 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 161 transitions, 1564 flow. Second operand has 9 states, 9 states have (on average 14.444444444444445) internal successors, (130), 9 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:10:02,553 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:10:02,554 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 54 [2024-06-14 12:10:02,554 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:10:04,697 INFO L124 PetriNetUnfolderBase]: 12369/17336 cut-off events. [2024-06-14 12:10:04,697 INFO L125 PetriNetUnfolderBase]: For 182939/182957 co-relation queries the response was YES. [2024-06-14 12:10:04,756 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79419 conditions, 17336 events. 12369/17336 cut-off events. For 182939/182957 co-relation queries the response was YES. Maximal size of possible extension queue 568. Compared 97033 event pairs, 5446 based on Foata normal form. 21/17332 useless extension candidates. Maximal degree in co-relation 79380. Up to 15932 conditions per place. [2024-06-14 12:10:04,828 INFO L140 encePairwiseOnDemand]: 41/54 looper letters, 107 selfloop transitions, 105 changer transitions 0/219 dead transitions. [2024-06-14 12:10:04,828 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 219 transitions, 2192 flow [2024-06-14 12:10:04,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:10:04,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:10:04,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 238 transitions. [2024-06-14 12:10:04,829 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4897119341563786 [2024-06-14 12:10:04,830 INFO L175 Difference]: Start difference. First operand has 102 places, 161 transitions, 1564 flow. Second operand 9 states and 238 transitions. [2024-06-14 12:10:04,830 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 219 transitions, 2192 flow [2024-06-14 12:10:05,025 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 219 transitions, 1959 flow, removed 42 selfloop flow, removed 5 redundant places. [2024-06-14 12:10:05,027 INFO L231 Difference]: Finished difference. Result has 106 places, 161 transitions, 1556 flow [2024-06-14 12:10:05,027 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=1331, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=161, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=105, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1556, PETRI_PLACES=106, PETRI_TRANSITIONS=161} [2024-06-14 12:10:05,028 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 49 predicate places. [2024-06-14 12:10:05,028 INFO L495 AbstractCegarLoop]: Abstraction has has 106 places, 161 transitions, 1556 flow [2024-06-14 12:10:05,028 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.444444444444445) internal successors, (130), 9 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:10:05,028 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:10:05,028 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:10:05,028 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-14 12:10:05,028 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 12:10:05,029 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:10:05,029 INFO L85 PathProgramCache]: Analyzing trace with hash 13766054, now seen corresponding path program 1 times [2024-06-14 12:10:05,030 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:10:05,030 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1979092722] [2024-06-14 12:10:05,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:10:05,030 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:10:05,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:10:06,317 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:10:06,317 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:10:06,317 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1979092722] [2024-06-14 12:10:06,318 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1979092722] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:10:06,318 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:10:06,318 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:10:06,318 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2059067072] [2024-06-14 12:10:06,318 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:10:06,318 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:10:06,318 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:10:06,318 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:10:06,318 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:10:06,456 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 54 [2024-06-14 12:10:06,457 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 161 transitions, 1556 flow. Second operand has 9 states, 9 states have (on average 15.444444444444445) internal successors, (139), 9 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:10:06,457 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:10:06,457 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 54 [2024-06-14 12:10:06,457 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:10:08,531 INFO L124 PetriNetUnfolderBase]: 10662/15391 cut-off events. [2024-06-14 12:10:08,532 INFO L125 PetriNetUnfolderBase]: For 171141/171143 co-relation queries the response was YES. [2024-06-14 12:10:08,608 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70963 conditions, 15391 events. 10662/15391 cut-off events. For 171141/171143 co-relation queries the response was YES. Maximal size of possible extension queue 508. Compared 89422 event pairs, 4734 based on Foata normal form. 6/15219 useless extension candidates. Maximal degree in co-relation 70922. Up to 14406 conditions per place. [2024-06-14 12:10:08,680 INFO L140 encePairwiseOnDemand]: 42/54 looper letters, 178 selfloop transitions, 21 changer transitions 0/207 dead transitions. [2024-06-14 12:10:08,680 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 207 transitions, 2145 flow [2024-06-14 12:10:08,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:10:08,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:10:08,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 208 transitions. [2024-06-14 12:10:08,682 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48148148148148145 [2024-06-14 12:10:08,682 INFO L175 Difference]: Start difference. First operand has 106 places, 161 transitions, 1556 flow. Second operand 8 states and 208 transitions. [2024-06-14 12:10:08,682 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 207 transitions, 2145 flow [2024-06-14 12:10:08,838 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 207 transitions, 1777 flow, removed 6 selfloop flow, removed 10 redundant places. [2024-06-14 12:10:08,840 INFO L231 Difference]: Finished difference. Result has 105 places, 168 transitions, 1322 flow [2024-06-14 12:10:08,841 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=1195, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=161, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=143, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1322, PETRI_PLACES=105, PETRI_TRANSITIONS=168} [2024-06-14 12:10:08,841 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 48 predicate places. [2024-06-14 12:10:08,841 INFO L495 AbstractCegarLoop]: Abstraction has has 105 places, 168 transitions, 1322 flow [2024-06-14 12:10:08,841 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.444444444444445) internal successors, (139), 9 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:10:08,841 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:10:08,842 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:10:08,842 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-14 12:10:08,842 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 12:10:08,842 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:10:08,842 INFO L85 PathProgramCache]: Analyzing trace with hash -1440987642, now seen corresponding path program 1 times [2024-06-14 12:10:08,842 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:10:08,843 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1314085569] [2024-06-14 12:10:08,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:10:08,843 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:10:08,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:10:09,799 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:10:09,800 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:10:09,800 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1314085569] [2024-06-14 12:10:09,800 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1314085569] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:10:09,800 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:10:09,800 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 12:10:09,800 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1645920732] [2024-06-14 12:10:09,801 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:10:09,802 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 12:10:09,803 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:10:09,803 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 12:10:09,803 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-14 12:10:09,881 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 54 [2024-06-14 12:10:09,883 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 168 transitions, 1322 flow. Second operand has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 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) [2024-06-14 12:10:09,883 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:10:09,883 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 54 [2024-06-14 12:10:09,883 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:10:11,811 INFO L124 PetriNetUnfolderBase]: 11839/16737 cut-off events. [2024-06-14 12:10:11,812 INFO L125 PetriNetUnfolderBase]: For 219048/219080 co-relation queries the response was YES. [2024-06-14 12:10:11,857 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80550 conditions, 16737 events. 11839/16737 cut-off events. For 219048/219080 co-relation queries the response was YES. Maximal size of possible extension queue 566. Compared 95251 event pairs, 5534 based on Foata normal form. 20/16736 useless extension candidates. Maximal degree in co-relation 80508. Up to 15842 conditions per place. [2024-06-14 12:10:11,926 INFO L140 encePairwiseOnDemand]: 43/54 looper letters, 166 selfloop transitions, 22 changer transitions 0/202 dead transitions. [2024-06-14 12:10:11,926 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 202 transitions, 1946 flow [2024-06-14 12:10:11,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 12:10:11,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 12:10:11,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 157 transitions. [2024-06-14 12:10:11,929 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4845679012345679 [2024-06-14 12:10:11,929 INFO L175 Difference]: Start difference. First operand has 105 places, 168 transitions, 1322 flow. Second operand 6 states and 157 transitions. [2024-06-14 12:10:11,930 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 202 transitions, 1946 flow [2024-06-14 12:10:12,068 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 202 transitions, 1876 flow, removed 17 selfloop flow, removed 5 redundant places. [2024-06-14 12:10:12,070 INFO L231 Difference]: Finished difference. Result has 108 places, 182 transitions, 1460 flow [2024-06-14 12:10:12,070 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=1252, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=168, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=153, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1460, PETRI_PLACES=108, PETRI_TRANSITIONS=182} [2024-06-14 12:10:12,071 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 51 predicate places. [2024-06-14 12:10:12,071 INFO L495 AbstractCegarLoop]: Abstraction has has 108 places, 182 transitions, 1460 flow [2024-06-14 12:10:12,071 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 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) [2024-06-14 12:10:12,071 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:10:12,071 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:10:12,071 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-14 12:10:12,071 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)] === [2024-06-14 12:10:12,072 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:10:12,072 INFO L85 PathProgramCache]: Analyzing trace with hash 657749670, now seen corresponding path program 1 times [2024-06-14 12:10:12,072 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:10:12,072 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [400592109] [2024-06-14 12:10:12,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:10:12,072 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:10:12,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:10:12,940 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:10:12,940 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:10:12,940 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [400592109] [2024-06-14 12:10:12,940 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [400592109] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:10:12,940 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:10:12,940 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:10:12,941 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1346686794] [2024-06-14 12:10:12,941 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:10:12,941 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:10:12,941 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:10:12,941 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:10:12,941 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:10:13,045 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 54 [2024-06-14 12:10:13,045 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 182 transitions, 1460 flow. Second operand has 8 states, 8 states have (on average 14.625) internal successors, (117), 8 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:10:13,045 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:10:13,045 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 54 [2024-06-14 12:10:13,045 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:10:15,153 INFO L124 PetriNetUnfolderBase]: 12811/17970 cut-off events. [2024-06-14 12:10:15,153 INFO L125 PetriNetUnfolderBase]: For 264676/264814 co-relation queries the response was YES. [2024-06-14 12:10:15,263 INFO L83 FinitePrefix]: Finished finitePrefix Result has 91431 conditions, 17970 events. 12811/17970 cut-off events. For 264676/264814 co-relation queries the response was YES. Maximal size of possible extension queue 597. Compared 101124 event pairs, 4674 based on Foata normal form. 22/17940 useless extension candidates. Maximal degree in co-relation 91386. Up to 16825 conditions per place. [2024-06-14 12:10:15,354 INFO L140 encePairwiseOnDemand]: 43/54 looper letters, 172 selfloop transitions, 46 changer transitions 0/228 dead transitions. [2024-06-14 12:10:15,354 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 114 places, 228 transitions, 2214 flow [2024-06-14 12:10:15,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:10:15,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:10:15,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 187 transitions. [2024-06-14 12:10:15,356 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4947089947089947 [2024-06-14 12:10:15,356 INFO L175 Difference]: Start difference. First operand has 108 places, 182 transitions, 1460 flow. Second operand 7 states and 187 transitions. [2024-06-14 12:10:15,356 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 114 places, 228 transitions, 2214 flow [2024-06-14 12:10:15,587 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 228 transitions, 2174 flow, removed 19 selfloop flow, removed 1 redundant places. [2024-06-14 12:10:15,590 INFO L231 Difference]: Finished difference. Result has 114 places, 188 transitions, 1616 flow [2024-06-14 12:10:15,590 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=1420, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=182, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=139, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1616, PETRI_PLACES=114, PETRI_TRANSITIONS=188} [2024-06-14 12:10:15,590 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 57 predicate places. [2024-06-14 12:10:15,591 INFO L495 AbstractCegarLoop]: Abstraction has has 114 places, 188 transitions, 1616 flow [2024-06-14 12:10:15,591 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.625) internal successors, (117), 8 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:10:15,592 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:10:15,592 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:10:15,592 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-14 12:10:15,592 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)] === [2024-06-14 12:10:15,592 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:10:15,592 INFO L85 PathProgramCache]: Analyzing trace with hash 1650091118, now seen corresponding path program 2 times [2024-06-14 12:10:15,592 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:10:15,592 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1921397531] [2024-06-14 12:10:15,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:10:15,592 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:10:15,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:10:16,443 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:10:16,443 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:10:16,444 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1921397531] [2024-06-14 12:10:16,444 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1921397531] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:10:16,444 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:10:16,444 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:10:16,444 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [612153879] [2024-06-14 12:10:16,444 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:10:16,445 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:10:16,445 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:10:16,445 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:10:16,445 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:10:16,550 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 54 [2024-06-14 12:10:16,551 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 188 transitions, 1616 flow. Second operand has 8 states, 8 states have (on average 14.625) internal successors, (117), 8 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:10:16,551 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:10:16,551 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 54 [2024-06-14 12:10:16,551 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:10:18,631 INFO L124 PetriNetUnfolderBase]: 12796/17940 cut-off events. [2024-06-14 12:10:18,631 INFO L125 PetriNetUnfolderBase]: For 295497/295627 co-relation queries the response was YES. [2024-06-14 12:10:18,707 INFO L83 FinitePrefix]: Finished finitePrefix Result has 94461 conditions, 17940 events. 12796/17940 cut-off events. For 295497/295627 co-relation queries the response was YES. Maximal size of possible extension queue 597. Compared 100712 event pairs, 5486 based on Foata normal form. 14/17902 useless extension candidates. Maximal degree in co-relation 94413. Up to 16940 conditions per place. [2024-06-14 12:10:18,785 INFO L140 encePairwiseOnDemand]: 42/54 looper letters, 171 selfloop transitions, 45 changer transitions 0/226 dead transitions. [2024-06-14 12:10:18,786 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 226 transitions, 2178 flow [2024-06-14 12:10:18,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:10:18,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:10:18,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 184 transitions. [2024-06-14 12:10:18,794 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48677248677248675 [2024-06-14 12:10:18,794 INFO L175 Difference]: Start difference. First operand has 114 places, 188 transitions, 1616 flow. Second operand 7 states and 184 transitions. [2024-06-14 12:10:18,794 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 226 transitions, 2178 flow [2024-06-14 12:10:19,029 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 226 transitions, 2069 flow, removed 35 selfloop flow, removed 3 redundant places. [2024-06-14 12:10:19,032 INFO L231 Difference]: Finished difference. Result has 118 places, 188 transitions, 1609 flow [2024-06-14 12:10:19,033 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=1507, PETRI_DIFFERENCE_MINUEND_PLACES=111, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=188, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=143, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1609, PETRI_PLACES=118, PETRI_TRANSITIONS=188} [2024-06-14 12:10:19,033 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 61 predicate places. [2024-06-14 12:10:19,033 INFO L495 AbstractCegarLoop]: Abstraction has has 118 places, 188 transitions, 1609 flow [2024-06-14 12:10:19,033 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.625) internal successors, (117), 8 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:10:19,033 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:10:19,034 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:10:19,034 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-14 12:10:19,034 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)] === [2024-06-14 12:10:19,034 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:10:19,034 INFO L85 PathProgramCache]: Analyzing trace with hash -1721372374, now seen corresponding path program 1 times [2024-06-14 12:10:19,034 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:10:19,034 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [896745341] [2024-06-14 12:10:19,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:10:19,035 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:10:19,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:10:19,899 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:10:19,899 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:10:19,899 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [896745341] [2024-06-14 12:10:19,899 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [896745341] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:10:19,899 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:10:19,899 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 12:10:19,900 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1011567803] [2024-06-14 12:10:19,900 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:10:19,900 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 12:10:19,900 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:10:19,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 12:10:19,901 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-14 12:10:19,964 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 54 [2024-06-14 12:10:19,965 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 188 transitions, 1609 flow. Second operand has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 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) [2024-06-14 12:10:19,965 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:10:19,965 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 54 [2024-06-14 12:10:19,965 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:10:21,894 INFO L124 PetriNetUnfolderBase]: 12223/17332 cut-off events. [2024-06-14 12:10:21,895 INFO L125 PetriNetUnfolderBase]: For 316538/316695 co-relation queries the response was YES. [2024-06-14 12:10:21,990 INFO L83 FinitePrefix]: Finished finitePrefix Result has 92725 conditions, 17332 events. 12223/17332 cut-off events. For 316538/316695 co-relation queries the response was YES. Maximal size of possible extension queue 597. Compared 99651 event pairs, 5481 based on Foata normal form. 18/17290 useless extension candidates. Maximal degree in co-relation 92675. Up to 16306 conditions per place. [2024-06-14 12:10:22,078 INFO L140 encePairwiseOnDemand]: 44/54 looper letters, 182 selfloop transitions, 17 changer transitions 0/218 dead transitions. [2024-06-14 12:10:22,078 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 218 transitions, 2147 flow [2024-06-14 12:10:22,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 12:10:22,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 12:10:22,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 157 transitions. [2024-06-14 12:10:22,079 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4845679012345679 [2024-06-14 12:10:22,079 INFO L175 Difference]: Start difference. First operand has 118 places, 188 transitions, 1609 flow. Second operand 6 states and 157 transitions. [2024-06-14 12:10:22,079 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 218 transitions, 2147 flow [2024-06-14 12:10:22,528 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 218 transitions, 2045 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-06-14 12:10:22,531 INFO L231 Difference]: Finished difference. Result has 118 places, 192 transitions, 1609 flow [2024-06-14 12:10:22,531 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=1507, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=188, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=171, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1609, PETRI_PLACES=118, PETRI_TRANSITIONS=192} [2024-06-14 12:10:22,531 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 61 predicate places. [2024-06-14 12:10:22,532 INFO L495 AbstractCegarLoop]: Abstraction has has 118 places, 192 transitions, 1609 flow [2024-06-14 12:10:22,532 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 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) [2024-06-14 12:10:22,532 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:10:22,532 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:10:22,532 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-14 12:10:22,532 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 12:10:22,533 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:10:22,533 INFO L85 PathProgramCache]: Analyzing trace with hash -1720956664, now seen corresponding path program 2 times [2024-06-14 12:10:22,533 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:10:22,533 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [502016450] [2024-06-14 12:10:22,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:10:22,533 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:10:22,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:10:23,376 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:10:23,377 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:10:23,377 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [502016450] [2024-06-14 12:10:23,377 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [502016450] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:10:23,377 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:10:23,377 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 12:10:23,377 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [748726491] [2024-06-14 12:10:23,377 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:10:23,378 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 12:10:23,378 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:10:23,378 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 12:10:23,378 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-14 12:10:23,440 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 54 [2024-06-14 12:10:23,441 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 192 transitions, 1609 flow. Second operand has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 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) [2024-06-14 12:10:23,441 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:10:23,441 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 54 [2024-06-14 12:10:23,441 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:10:25,409 INFO L124 PetriNetUnfolderBase]: 12216/17333 cut-off events. [2024-06-14 12:10:25,409 INFO L125 PetriNetUnfolderBase]: For 347498/347686 co-relation queries the response was YES. [2024-06-14 12:10:25,498 INFO L83 FinitePrefix]: Finished finitePrefix Result has 96217 conditions, 17333 events. 12216/17333 cut-off events. For 347498/347686 co-relation queries the response was YES. Maximal size of possible extension queue 597. Compared 99811 event pairs, 5476 based on Foata normal form. 25/17295 useless extension candidates. Maximal degree in co-relation 96166. Up to 16279 conditions per place. [2024-06-14 12:10:25,584 INFO L140 encePairwiseOnDemand]: 44/54 looper letters, 174 selfloop transitions, 24 changer transitions 0/217 dead transitions. [2024-06-14 12:10:25,584 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 217 transitions, 2137 flow [2024-06-14 12:10:25,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 12:10:25,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 12:10:25,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 153 transitions. [2024-06-14 12:10:25,585 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4722222222222222 [2024-06-14 12:10:25,586 INFO L175 Difference]: Start difference. First operand has 118 places, 192 transitions, 1609 flow. Second operand 6 states and 153 transitions. [2024-06-14 12:10:25,586 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 217 transitions, 2137 flow [2024-06-14 12:10:25,896 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 217 transitions, 2067 flow, removed 21 selfloop flow, removed 4 redundant places. [2024-06-14 12:10:25,898 INFO L231 Difference]: Finished difference. Result has 120 places, 196 transitions, 1662 flow [2024-06-14 12:10:25,898 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=1539, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=192, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=168, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1662, PETRI_PLACES=120, PETRI_TRANSITIONS=196} [2024-06-14 12:10:25,899 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 63 predicate places. [2024-06-14 12:10:25,899 INFO L495 AbstractCegarLoop]: Abstraction has has 120 places, 196 transitions, 1662 flow [2024-06-14 12:10:25,899 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 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) [2024-06-14 12:10:25,899 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:10:25,899 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:10:25,900 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-14 12:10:25,900 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 12:10:25,900 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:10:25,900 INFO L85 PathProgramCache]: Analyzing trace with hash 1459125144, now seen corresponding path program 1 times [2024-06-14 12:10:25,900 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:10:25,900 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1361144484] [2024-06-14 12:10:25,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:10:25,901 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:10:25,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:10:26,667 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:10:26,667 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:10:26,667 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1361144484] [2024-06-14 12:10:26,668 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1361144484] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:10:26,668 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:10:26,668 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 12:10:26,668 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2144864103] [2024-06-14 12:10:26,668 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:10:26,668 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 12:10:26,669 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:10:26,669 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 12:10:26,669 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-14 12:10:26,736 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 54 [2024-06-14 12:10:26,737 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 196 transitions, 1662 flow. Second operand has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 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) [2024-06-14 12:10:26,737 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:10:26,737 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 54 [2024-06-14 12:10:26,737 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:10:28,645 INFO L124 PetriNetUnfolderBase]: 11135/16240 cut-off events. [2024-06-14 12:10:28,645 INFO L125 PetriNetUnfolderBase]: For 325163/325333 co-relation queries the response was YES. [2024-06-14 12:10:28,716 INFO L83 FinitePrefix]: Finished finitePrefix Result has 91469 conditions, 16240 events. 11135/16240 cut-off events. For 325163/325333 co-relation queries the response was YES. Maximal size of possible extension queue 558. Compared 96663 event pairs, 4663 based on Foata normal form. 2/16177 useless extension candidates. Maximal degree in co-relation 91417. Up to 14991 conditions per place. [2024-06-14 12:10:28,792 INFO L140 encePairwiseOnDemand]: 44/54 looper letters, 196 selfloop transitions, 14 changer transitions 0/221 dead transitions. [2024-06-14 12:10:28,792 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 125 places, 221 transitions, 2206 flow [2024-06-14 12:10:28,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 12:10:28,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 12:10:28,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 154 transitions. [2024-06-14 12:10:28,793 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47530864197530864 [2024-06-14 12:10:28,794 INFO L175 Difference]: Start difference. First operand has 120 places, 196 transitions, 1662 flow. Second operand 6 states and 154 transitions. [2024-06-14 12:10:28,794 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 125 places, 221 transitions, 2206 flow [2024-06-14 12:10:29,080 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 121 places, 221 transitions, 2113 flow, removed 25 selfloop flow, removed 4 redundant places. [2024-06-14 12:10:29,083 INFO L231 Difference]: Finished difference. Result has 122 places, 200 transitions, 1672 flow [2024-06-14 12:10:29,083 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=1569, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=196, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=182, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1672, PETRI_PLACES=122, PETRI_TRANSITIONS=200} [2024-06-14 12:10:29,083 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 65 predicate places. [2024-06-14 12:10:29,083 INFO L495 AbstractCegarLoop]: Abstraction has has 122 places, 200 transitions, 1672 flow [2024-06-14 12:10:29,084 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 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) [2024-06-14 12:10:29,084 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:10:29,084 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:10:29,085 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-14 12:10:29,085 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 12:10:29,086 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:10:29,086 INFO L85 PathProgramCache]: Analyzing trace with hash 1459304634, now seen corresponding path program 2 times [2024-06-14 12:10:29,086 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:10:29,086 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [956953045] [2024-06-14 12:10:29,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:10:29,086 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:10:29,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:10:29,930 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:10:29,930 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:10:29,930 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [956953045] [2024-06-14 12:10:29,930 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [956953045] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:10:29,930 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:10:29,930 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 12:10:29,931 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [8121649] [2024-06-14 12:10:29,931 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:10:29,931 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 12:10:29,931 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:10:29,931 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 12:10:29,932 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-14 12:10:30,042 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 54 [2024-06-14 12:10:30,043 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 200 transitions, 1672 flow. Second operand has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 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) [2024-06-14 12:10:30,043 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:10:30,043 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 54 [2024-06-14 12:10:30,043 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:10:31,972 INFO L124 PetriNetUnfolderBase]: 11128/16233 cut-off events. [2024-06-14 12:10:31,972 INFO L125 PetriNetUnfolderBase]: For 354612/354806 co-relation queries the response was YES. [2024-06-14 12:10:32,058 INFO L83 FinitePrefix]: Finished finitePrefix Result has 94631 conditions, 16233 events. 11128/16233 cut-off events. For 354612/354806 co-relation queries the response was YES. Maximal size of possible extension queue 558. Compared 96575 event pairs, 4670 based on Foata normal form. 6/16172 useless extension candidates. Maximal degree in co-relation 94578. Up to 14964 conditions per place. [2024-06-14 12:10:32,142 INFO L140 encePairwiseOnDemand]: 44/54 looper letters, 190 selfloop transitions, 21 changer transitions 0/222 dead transitions. [2024-06-14 12:10:32,143 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 127 places, 222 transitions, 2216 flow [2024-06-14 12:10:32,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 12:10:32,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 12:10:32,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 153 transitions. [2024-06-14 12:10:32,144 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4722222222222222 [2024-06-14 12:10:32,144 INFO L175 Difference]: Start difference. First operand has 122 places, 200 transitions, 1672 flow. Second operand 6 states and 153 transitions. [2024-06-14 12:10:32,144 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 127 places, 222 transitions, 2216 flow [2024-06-14 12:10:32,501 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 222 transitions, 2143 flow, removed 25 selfloop flow, removed 4 redundant places. [2024-06-14 12:10:32,503 INFO L231 Difference]: Finished difference. Result has 124 places, 204 transitions, 1724 flow [2024-06-14 12:10:32,504 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=1599, PETRI_DIFFERENCE_MINUEND_PLACES=118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=200, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=179, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1724, PETRI_PLACES=124, PETRI_TRANSITIONS=204} [2024-06-14 12:10:32,504 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 67 predicate places. [2024-06-14 12:10:32,504 INFO L495 AbstractCegarLoop]: Abstraction has has 124 places, 204 transitions, 1724 flow [2024-06-14 12:10:32,504 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 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) [2024-06-14 12:10:32,505 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:10:32,505 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:10:32,505 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-14 12:10:32,505 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)] === [2024-06-14 12:10:32,505 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:10:32,505 INFO L85 PathProgramCache]: Analyzing trace with hash -1720941784, now seen corresponding path program 1 times [2024-06-14 12:10:32,506 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:10:32,506 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [255041603] [2024-06-14 12:10:32,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:10:32,506 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:10:32,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:10:33,702 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:10:33,702 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:10:33,702 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [255041603] [2024-06-14 12:10:33,702 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [255041603] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:10:33,702 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:10:33,702 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:10:33,702 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1913665740] [2024-06-14 12:10:33,702 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:10:33,703 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:10:33,703 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:10:33,703 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:10:33,703 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:10:33,845 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 54 [2024-06-14 12:10:33,845 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 124 places, 204 transitions, 1724 flow. Second operand has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:10:33,845 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:10:33,845 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 54 [2024-06-14 12:10:33,845 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:10:35,936 INFO L124 PetriNetUnfolderBase]: 11865/16927 cut-off events. [2024-06-14 12:10:35,936 INFO L125 PetriNetUnfolderBase]: For 437856/437888 co-relation queries the response was YES. [2024-06-14 12:10:36,083 INFO L83 FinitePrefix]: Finished finitePrefix Result has 103561 conditions, 16927 events. 11865/16927 cut-off events. For 437856/437888 co-relation queries the response was YES. Maximal size of possible extension queue 577. Compared 97958 event pairs, 5353 based on Foata normal form. 20/16926 useless extension candidates. Maximal degree in co-relation 103507. Up to 15875 conditions per place. [2024-06-14 12:10:36,176 INFO L140 encePairwiseOnDemand]: 42/54 looper letters, 188 selfloop transitions, 27 changer transitions 0/233 dead transitions. [2024-06-14 12:10:36,177 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 130 places, 233 transitions, 2394 flow [2024-06-14 12:10:36,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:10:36,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:10:36,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 180 transitions. [2024-06-14 12:10:36,178 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47619047619047616 [2024-06-14 12:10:36,178 INFO L175 Difference]: Start difference. First operand has 124 places, 204 transitions, 1724 flow. Second operand 7 states and 180 transitions. [2024-06-14 12:10:36,178 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 130 places, 233 transitions, 2394 flow [2024-06-14 12:10:36,551 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 126 places, 233 transitions, 2299 flow, removed 29 selfloop flow, removed 4 redundant places. [2024-06-14 12:10:36,553 INFO L231 Difference]: Finished difference. Result has 127 places, 209 transitions, 1775 flow [2024-06-14 12:10:36,554 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=1629, PETRI_DIFFERENCE_MINUEND_PLACES=120, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=204, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=177, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1775, PETRI_PLACES=127, PETRI_TRANSITIONS=209} [2024-06-14 12:10:36,554 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 70 predicate places. [2024-06-14 12:10:36,554 INFO L495 AbstractCegarLoop]: Abstraction has has 127 places, 209 transitions, 1775 flow [2024-06-14 12:10:36,554 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.875) internal successors, (127), 8 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:10:36,554 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:10:36,554 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:10:36,555 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-14 12:10:36,555 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 12:10:36,555 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:10:36,555 INFO L85 PathProgramCache]: Analyzing trace with hash 1580448556, now seen corresponding path program 1 times [2024-06-14 12:10:36,555 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:10:36,555 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2086931576] [2024-06-14 12:10:36,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:10:36,556 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:10:36,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:10:37,472 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:10:37,472 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:10:37,472 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2086931576] [2024-06-14 12:10:37,472 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2086931576] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:10:37,472 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:10:37,472 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:10:37,473 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1758485960] [2024-06-14 12:10:37,473 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:10:37,475 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:10:37,475 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:10:37,475 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:10:37,475 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:10:37,636 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 54 [2024-06-14 12:10:37,636 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 127 places, 209 transitions, 1775 flow. Second operand has 9 states, 9 states have (on average 14.555555555555555) internal successors, (131), 9 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:10:37,636 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:10:37,637 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 54 [2024-06-14 12:10:37,637 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:10:40,346 INFO L124 PetriNetUnfolderBase]: 13637/18974 cut-off events. [2024-06-14 12:10:40,347 INFO L125 PetriNetUnfolderBase]: For 589082/589158 co-relation queries the response was YES. [2024-06-14 12:10:40,432 INFO L83 FinitePrefix]: Finished finitePrefix Result has 124809 conditions, 18974 events. 13637/18974 cut-off events. For 589082/589158 co-relation queries the response was YES. Maximal size of possible extension queue 613. Compared 105818 event pairs, 4383 based on Foata normal form. 25/18846 useless extension candidates. Maximal degree in co-relation 124754. Up to 16547 conditions per place. [2024-06-14 12:10:40,533 INFO L140 encePairwiseOnDemand]: 42/54 looper letters, 151 selfloop transitions, 106 changer transitions 0/268 dead transitions. [2024-06-14 12:10:40,534 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 134 places, 268 transitions, 2713 flow [2024-06-14 12:10:40,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:10:40,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:10:40,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 222 transitions. [2024-06-14 12:10:40,535 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5138888888888888 [2024-06-14 12:10:40,535 INFO L175 Difference]: Start difference. First operand has 127 places, 209 transitions, 1775 flow. Second operand 8 states and 222 transitions. [2024-06-14 12:10:40,535 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 134 places, 268 transitions, 2713 flow [2024-06-14 12:10:40,895 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 129 places, 268 transitions, 2603 flow, removed 31 selfloop flow, removed 5 redundant places. [2024-06-14 12:10:40,898 INFO L231 Difference]: Finished difference. Result has 130 places, 213 transitions, 1994 flow [2024-06-14 12:10:40,899 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=1665, PETRI_DIFFERENCE_MINUEND_PLACES=122, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=209, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=104, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=105, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1994, PETRI_PLACES=130, PETRI_TRANSITIONS=213} [2024-06-14 12:10:40,899 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 73 predicate places. [2024-06-14 12:10:40,899 INFO L495 AbstractCegarLoop]: Abstraction has has 130 places, 213 transitions, 1994 flow [2024-06-14 12:10:40,899 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.555555555555555) internal successors, (131), 9 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:10:40,900 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:10:40,900 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:10:40,900 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-14 12:10:40,900 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 12:10:40,900 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:10:40,900 INFO L85 PathProgramCache]: Analyzing trace with hash 1669162186, now seen corresponding path program 2 times [2024-06-14 12:10:40,901 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:10:40,901 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [217634612] [2024-06-14 12:10:40,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:10:40,901 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:10:40,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:10:41,841 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:10:41,841 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:10:41,841 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [217634612] [2024-06-14 12:10:41,841 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [217634612] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:10:41,841 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:10:41,841 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:10:41,841 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [270369074] [2024-06-14 12:10:41,842 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:10:41,842 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:10:41,843 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:10:41,844 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:10:41,844 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:10:41,938 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 54 [2024-06-14 12:10:41,938 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 130 places, 213 transitions, 1994 flow. Second operand has 9 states, 9 states have (on average 14.555555555555555) internal successors, (131), 9 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:10:41,938 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:10:41,938 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 54 [2024-06-14 12:10:41,938 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:10:45,377 INFO L124 PetriNetUnfolderBase]: 13827/19281 cut-off events. [2024-06-14 12:10:45,378 INFO L125 PetriNetUnfolderBase]: For 641195/641275 co-relation queries the response was YES. [2024-06-14 12:10:45,453 INFO L83 FinitePrefix]: Finished finitePrefix Result has 129799 conditions, 19281 events. 13827/19281 cut-off events. For 641195/641275 co-relation queries the response was YES. Maximal size of possible extension queue 615. Compared 108157 event pairs, 5472 based on Foata normal form. 41/19173 useless extension candidates. Maximal degree in co-relation 129743. Up to 17492 conditions per place. [2024-06-14 12:10:45,544 INFO L140 encePairwiseOnDemand]: 41/54 looper letters, 149 selfloop transitions, 107 changer transitions 0/267 dead transitions. [2024-06-14 12:10:45,544 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 137 places, 267 transitions, 2752 flow [2024-06-14 12:10:45,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:10:45,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:10:45,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 218 transitions. [2024-06-14 12:10:45,546 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5046296296296297 [2024-06-14 12:10:45,546 INFO L175 Difference]: Start difference. First operand has 130 places, 213 transitions, 1994 flow. Second operand 8 states and 218 transitions. [2024-06-14 12:10:45,546 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 137 places, 267 transitions, 2752 flow [2024-06-14 12:10:45,943 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 133 places, 267 transitions, 2605 flow, removed 22 selfloop flow, removed 4 redundant places. [2024-06-14 12:10:45,946 INFO L231 Difference]: Finished difference. Result has 134 places, 216 transitions, 2150 flow [2024-06-14 12:10:45,947 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=1849, PETRI_DIFFERENCE_MINUEND_PLACES=126, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=213, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=104, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=106, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2150, PETRI_PLACES=134, PETRI_TRANSITIONS=216} [2024-06-14 12:10:45,952 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 77 predicate places. [2024-06-14 12:10:45,953 INFO L495 AbstractCegarLoop]: Abstraction has has 134 places, 216 transitions, 2150 flow [2024-06-14 12:10:45,953 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.555555555555555) internal successors, (131), 9 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:10:45,953 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:10:45,953 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:10:45,953 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-14 12:10:45,953 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)] === [2024-06-14 12:10:45,954 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:10:45,954 INFO L85 PathProgramCache]: Analyzing trace with hash -386781884, now seen corresponding path program 3 times [2024-06-14 12:10:45,954 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:10:45,954 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1561352977] [2024-06-14 12:10:45,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:10:45,954 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:10:45,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:10:46,969 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:10:46,969 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:10:46,969 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1561352977] [2024-06-14 12:10:46,969 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1561352977] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:10:46,969 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:10:46,969 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:10:46,969 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1811354815] [2024-06-14 12:10:46,969 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:10:46,969 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:10:46,970 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:10:46,970 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:10:46,970 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:10:47,114 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 54 [2024-06-14 12:10:47,114 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 134 places, 216 transitions, 2150 flow. Second operand has 9 states, 9 states have (on average 14.555555555555555) internal successors, (131), 9 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:10:47,114 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:10:47,114 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 54 [2024-06-14 12:10:47,114 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:10:50,168 INFO L124 PetriNetUnfolderBase]: 13955/19477 cut-off events. [2024-06-14 12:10:50,168 INFO L125 PetriNetUnfolderBase]: For 685412/685488 co-relation queries the response was YES. [2024-06-14 12:10:50,452 INFO L83 FinitePrefix]: Finished finitePrefix Result has 133789 conditions, 19477 events. 13955/19477 cut-off events. For 685412/685488 co-relation queries the response was YES. Maximal size of possible extension queue 615. Compared 109588 event pairs, 5476 based on Foata normal form. 25/19353 useless extension candidates. Maximal degree in co-relation 133731. Up to 17488 conditions per place. [2024-06-14 12:10:50,550 INFO L140 encePairwiseOnDemand]: 41/54 looper letters, 150 selfloop transitions, 110 changer transitions 0/271 dead transitions. [2024-06-14 12:10:50,550 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 141 places, 271 transitions, 2908 flow [2024-06-14 12:10:50,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:10:50,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:10:50,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 221 transitions. [2024-06-14 12:10:50,552 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5115740740740741 [2024-06-14 12:10:50,552 INFO L175 Difference]: Start difference. First operand has 134 places, 216 transitions, 2150 flow. Second operand 8 states and 221 transitions. [2024-06-14 12:10:50,552 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 141 places, 271 transitions, 2908 flow [2024-06-14 12:10:51,082 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 135 places, 271 transitions, 2659 flow, removed 22 selfloop flow, removed 6 redundant places. [2024-06-14 12:10:51,086 INFO L231 Difference]: Finished difference. Result has 136 places, 218 transitions, 2192 flow [2024-06-14 12:10:51,086 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=1901, PETRI_DIFFERENCE_MINUEND_PLACES=128, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=216, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=108, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=106, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2192, PETRI_PLACES=136, PETRI_TRANSITIONS=218} [2024-06-14 12:10:51,088 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 79 predicate places. [2024-06-14 12:10:51,088 INFO L495 AbstractCegarLoop]: Abstraction has has 136 places, 218 transitions, 2192 flow [2024-06-14 12:10:51,088 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.555555555555555) internal successors, (131), 9 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:10:51,089 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:10:51,089 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:10:51,089 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-14 12:10:51,089 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 12:10:51,089 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:10:51,089 INFO L85 PathProgramCache]: Analyzing trace with hash -1074893468, now seen corresponding path program 1 times [2024-06-14 12:10:51,089 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:10:51,090 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [238469352] [2024-06-14 12:10:51,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:10:51,090 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:10:51,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:10:51,889 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:10:51,890 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:10:51,890 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [238469352] [2024-06-14 12:10:51,890 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [238469352] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:10:51,890 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:10:51,890 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:10:51,890 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1030835053] [2024-06-14 12:10:51,890 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:10:51,891 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:10:51,891 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:10:51,891 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:10:51,891 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:10:52,011 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 54 [2024-06-14 12:10:52,012 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 136 places, 218 transitions, 2192 flow. Second operand has 8 states, 8 states have (on average 14.875) internal successors, (119), 8 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:10:52,012 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:10:52,012 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 54 [2024-06-14 12:10:52,012 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:10:54,892 INFO L124 PetriNetUnfolderBase]: 13975/19548 cut-off events. [2024-06-14 12:10:54,892 INFO L125 PetriNetUnfolderBase]: For 715960/716059 co-relation queries the response was YES. [2024-06-14 12:10:54,958 INFO L83 FinitePrefix]: Finished finitePrefix Result has 135112 conditions, 19548 events. 13975/19548 cut-off events. For 715960/716059 co-relation queries the response was YES. Maximal size of possible extension queue 612. Compared 110511 event pairs, 5728 based on Foata normal form. 31/19439 useless extension candidates. Maximal degree in co-relation 135053. Up to 18546 conditions per place. [2024-06-14 12:10:55,051 INFO L140 encePairwiseOnDemand]: 42/54 looper letters, 202 selfloop transitions, 47 changer transitions 0/260 dead transitions. [2024-06-14 12:10:55,051 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 142 places, 260 transitions, 2906 flow [2024-06-14 12:10:55,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:10:55,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:10:55,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 184 transitions. [2024-06-14 12:10:55,068 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48677248677248675 [2024-06-14 12:10:55,068 INFO L175 Difference]: Start difference. First operand has 136 places, 218 transitions, 2192 flow. Second operand 7 states and 184 transitions. [2024-06-14 12:10:55,068 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 142 places, 260 transitions, 2906 flow [2024-06-14 12:10:55,553 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 136 places, 260 transitions, 2647 flow, removed 21 selfloop flow, removed 6 redundant places. [2024-06-14 12:10:55,556 INFO L231 Difference]: Finished difference. Result has 137 places, 223 transitions, 2134 flow [2024-06-14 12:10:55,556 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=1933, PETRI_DIFFERENCE_MINUEND_PLACES=130, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=218, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=171, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2134, PETRI_PLACES=137, PETRI_TRANSITIONS=223} [2024-06-14 12:10:55,556 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 80 predicate places. [2024-06-14 12:10:55,556 INFO L495 AbstractCegarLoop]: Abstraction has has 137 places, 223 transitions, 2134 flow [2024-06-14 12:10:55,556 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.875) internal successors, (119), 8 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:10:55,557 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:10:55,557 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:10:55,557 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-14 12:10:55,557 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 12:10:55,557 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:10:55,557 INFO L85 PathProgramCache]: Analyzing trace with hash -1107722910, now seen corresponding path program 4 times [2024-06-14 12:10:55,557 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:10:55,558 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [621434788] [2024-06-14 12:10:55,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:10:55,558 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:10:55,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:10:56,593 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:10:56,593 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:10:56,594 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [621434788] [2024-06-14 12:10:56,594 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [621434788] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:10:56,594 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:10:56,594 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:10:56,594 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1786613974] [2024-06-14 12:10:56,594 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:10:56,594 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:10:56,595 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:10:56,595 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:10:56,595 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:10:56,709 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 54 [2024-06-14 12:10:56,710 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 137 places, 223 transitions, 2134 flow. Second operand has 9 states, 9 states have (on average 14.555555555555555) internal successors, (131), 9 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:10:56,710 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:10:56,710 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 54 [2024-06-14 12:10:56,710 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:10:59,935 INFO L124 PetriNetUnfolderBase]: 14234/19949 cut-off events. [2024-06-14 12:10:59,935 INFO L125 PetriNetUnfolderBase]: For 785750/785852 co-relation queries the response was YES. [2024-06-14 12:11:00,026 INFO L83 FinitePrefix]: Finished finitePrefix Result has 141687 conditions, 19949 events. 14234/19949 cut-off events. For 785750/785852 co-relation queries the response was YES. Maximal size of possible extension queue 615. Compared 113266 event pairs, 4658 based on Foata normal form. 47/19853 useless extension candidates. Maximal degree in co-relation 141627. Up to 17719 conditions per place. [2024-06-14 12:11:00,146 INFO L140 encePairwiseOnDemand]: 41/54 looper letters, 163 selfloop transitions, 112 changer transitions 0/286 dead transitions. [2024-06-14 12:11:00,146 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 144 places, 286 transitions, 3166 flow [2024-06-14 12:11:00,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:11:00,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:11:00,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 227 transitions. [2024-06-14 12:11:00,147 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5254629629629629 [2024-06-14 12:11:00,147 INFO L175 Difference]: Start difference. First operand has 137 places, 223 transitions, 2134 flow. Second operand 8 states and 227 transitions. [2024-06-14 12:11:00,148 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 144 places, 286 transitions, 3166 flow [2024-06-14 12:11:00,667 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 139 places, 286 transitions, 3003 flow, removed 38 selfloop flow, removed 5 redundant places. [2024-06-14 12:11:00,670 INFO L231 Difference]: Finished difference. Result has 140 places, 227 transitions, 2332 flow [2024-06-14 12:11:00,670 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=1971, PETRI_DIFFERENCE_MINUEND_PLACES=132, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=223, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=110, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=113, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2332, PETRI_PLACES=140, PETRI_TRANSITIONS=227} [2024-06-14 12:11:00,671 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 83 predicate places. [2024-06-14 12:11:00,671 INFO L495 AbstractCegarLoop]: Abstraction has has 140 places, 227 transitions, 2332 flow [2024-06-14 12:11:00,671 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.555555555555555) internal successors, (131), 9 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:11:00,671 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:11:00,671 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:11:00,672 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-14 12:11:00,672 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 12:11:00,672 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:11:00,672 INFO L85 PathProgramCache]: Analyzing trace with hash -1102212660, now seen corresponding path program 5 times [2024-06-14 12:11:00,672 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:11:00,672 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1460599654] [2024-06-14 12:11:00,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:11:00,673 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:11:00,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:11:01,982 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:11:01,983 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:11:01,983 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1460599654] [2024-06-14 12:11:01,983 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1460599654] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:11:01,983 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:11:01,983 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:11:01,983 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [946098918] [2024-06-14 12:11:01,983 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:11:01,983 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:11:01,983 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:11:01,984 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:11:01,984 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:11:02,153 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 54 [2024-06-14 12:11:02,154 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 140 places, 227 transitions, 2332 flow. Second operand has 10 states, 10 states have (on average 14.4) internal successors, (144), 10 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:11:02,154 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:11:02,154 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 54 [2024-06-14 12:11:02,154 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:11:05,923 INFO L124 PetriNetUnfolderBase]: 14398/20171 cut-off events. [2024-06-14 12:11:05,923 INFO L125 PetriNetUnfolderBase]: For 841046/841132 co-relation queries the response was YES. [2024-06-14 12:11:06,015 INFO L83 FinitePrefix]: Finished finitePrefix Result has 145505 conditions, 20171 events. 14398/20171 cut-off events. For 841046/841132 co-relation queries the response was YES. Maximal size of possible extension queue 618. Compared 114729 event pairs, 5549 based on Foata normal form. 35/20063 useless extension candidates. Maximal degree in co-relation 145444. Up to 18405 conditions per place. [2024-06-14 12:11:06,120 INFO L140 encePairwiseOnDemand]: 41/54 looper letters, 173 selfloop transitions, 106 changer transitions 0/290 dead transitions. [2024-06-14 12:11:06,120 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 148 places, 290 transitions, 3174 flow [2024-06-14 12:11:06,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:11:06,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:11:06,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 242 transitions. [2024-06-14 12:11:06,122 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49794238683127573 [2024-06-14 12:11:06,122 INFO L175 Difference]: Start difference. First operand has 140 places, 227 transitions, 2332 flow. Second operand 9 states and 242 transitions. [2024-06-14 12:11:06,122 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 148 places, 290 transitions, 3174 flow [2024-06-14 12:11:06,629 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 144 places, 290 transitions, 3009 flow, removed 23 selfloop flow, removed 4 redundant places. [2024-06-14 12:11:06,632 INFO L231 Difference]: Finished difference. Result has 145 places, 229 transitions, 2461 flow [2024-06-14 12:11:06,632 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=54, PETRI_DIFFERENCE_MINUEND_FLOW=2167, PETRI_DIFFERENCE_MINUEND_PLACES=136, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=227, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=104, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=121, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2461, PETRI_PLACES=145, PETRI_TRANSITIONS=229} [2024-06-14 12:11:06,633 INFO L281 CegarLoopForPetriNet]: 57 programPoint places, 88 predicate places. [2024-06-14 12:11:06,633 INFO L495 AbstractCegarLoop]: Abstraction has has 145 places, 229 transitions, 2461 flow [2024-06-14 12:11:06,633 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.4) internal successors, (144), 10 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:11:06,633 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:11:06,633 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:11:06,633 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-14 12:11:06,634 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 12:11:06,634 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:11:06,634 INFO L85 PathProgramCache]: Analyzing trace with hash -1107719190, now seen corresponding path program 6 times [2024-06-14 12:11:06,634 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:11:06,634 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1374583854] [2024-06-14 12:11:06,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:11:06,634 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:11:06,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:11:07,673 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:11:07,673 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:11:07,673 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1374583854] [2024-06-14 12:11:07,673 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1374583854] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:11:07,673 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:11:07,673 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:11:07,674 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [297280841] [2024-06-14 12:11:07,674 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:11:07,674 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:11:07,674 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:11:07,674 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:11:07,674 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:11:07,772 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 54 [2024-06-14 12:11:07,772 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 145 places, 229 transitions, 2461 flow. Second operand has 9 states, 9 states have (on average 14.555555555555555) internal successors, (131), 9 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:11:07,773 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:11:07,773 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 54 [2024-06-14 12:11:07,773 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand