./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/mix017_pso.opt_tso.opt.i --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --validate ./goblint.2024-05-21_14-57-05.files/protection/mix017_pso.opt_tso.opt.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version bcb38a6f Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReachWitnessValidation.xml -i ../../../trunk/examples/svcomp/pthread-wmm/mix017_pso.opt_tso.opt.i ./goblint.2024-05-21_14-57-05.files/protection/mix017_pso.opt_tso.opt.yml/witness.yml -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --traceabstraction.compute.hoare.annotation.of.negated.interpolant.automaton,.abstraction.and.cfg false --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.fs.goblint-validation-bcb38a6-m [2024-06-03 19:21:45,736 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-03 19:21:45,806 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-03 19:21:45,810 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-03 19:21:45,811 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-03 19:21:45,836 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-03 19:21:45,836 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-03 19:21:45,837 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-03 19:21:45,837 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-03 19:21:45,840 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-03 19:21:45,840 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-03 19:21:45,841 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-03 19:21:45,841 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-03 19:21:45,842 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-03 19:21:45,843 INFO L153 SettingsManager]: * Use SBE=true [2024-06-03 19:21:45,843 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-03 19:21:45,843 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-03 19:21:45,843 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-03 19:21:45,843 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-03 19:21:45,844 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-03 19:21:45,852 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-03 19:21:45,852 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-03 19:21:45,853 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-03 19:21:45,853 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-03 19:21:45,853 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-03 19:21:45,853 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-03 19:21:45,853 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-03 19:21:45,854 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-03 19:21:45,854 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-03 19:21:45,854 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-03 19:21:45,855 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-03 19:21:45,855 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-03 19:21:45,855 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-03 19:21:45,856 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-03 19:21:45,856 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-03 19:21:45,856 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-03 19:21:45,856 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-03 19:21:45,856 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-03 19:21:45,857 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-03 19:21:45,857 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-03 19:21:45,857 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-03 19:21:45,857 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-03 19:21:45,857 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-03 19:21:45,857 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-03 19:21:46,076 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-03 19:21:46,095 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-03 19:21:46,097 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-03 19:21:46,098 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-03 19:21:46,099 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-03 19:21:46,100 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-05-21_14-57-05.files/protection/mix017_pso.opt_tso.opt.yml/witness.yml [2024-06-03 19:21:46,259 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-03 19:21:46,259 INFO L274 PluginConnector]: CDTParser initialized [2024-06-03 19:21:46,260 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/mix017_pso.opt_tso.opt.i [2024-06-03 19:21:47,237 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-03 19:21:47,467 INFO L384 CDTParser]: Found 1 translation units. [2024-06-03 19:21:47,467 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/mix017_pso.opt_tso.opt.i [2024-06-03 19:21:47,482 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/83970778f/9277180c9a02459ebbf04d9d3bb54fb2/FLAG93cc94f83 [2024-06-03 19:21:47,491 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/83970778f/9277180c9a02459ebbf04d9d3bb54fb2 [2024-06-03 19:21:47,492 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-03 19:21:47,493 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-03 19:21:47,495 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-03 19:21:47,495 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-03 19:21:47,499 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-03 19:21:47,499 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 03.06 07:21:46" (1/2) ... [2024-06-03 19:21:47,500 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@428837df and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 07:21:47, skipping insertion in model container [2024-06-03 19:21:47,500 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 03.06 07:21:46" (1/2) ... [2024-06-03 19:21:47,503 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@665dba0e and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 07:21:47, skipping insertion in model container [2024-06-03 19:21:47,503 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.06 07:21:47" (2/2) ... [2024-06-03 19:21:47,504 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@428837df and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 07:21:47, skipping insertion in model container [2024-06-03 19:21:47,504 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.06 07:21:47" (2/2) ... [2024-06-03 19:21:47,505 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-03 19:21:47,643 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-03 19:21:47,644 INFO L97 edCorrectnessWitness]: Location invariant before [L869-L869] (((((((((((((((((((((((! multithreaded || ((0 <= z$w_buff1 && z$w_buff1 <= 1) && (z$w_buff1 == 0 || z$w_buff1 == 1))) && (! multithreaded || z$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || z$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || ((0 <= a && a <= 1) && (a == 0 || a == 1)))) && (! multithreaded || z$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || z$read_delayed_var == 0)) && (! multithreaded || ((0 <= __unbuffered_p3_EBX && __unbuffered_p3_EBX <= 1) && (__unbuffered_p3_EBX == 0 || __unbuffered_p3_EBX == 1)))) && (! multithreaded || z$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || z$read_delayed == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p3_EAX && __unbuffered_p3_EAX <= 1) && (__unbuffered_p3_EAX == 0 || __unbuffered_p3_EAX == 1)))) && (! multithreaded || z$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || ((0 <= z && z <= 1) && (z == 0 || z == 1)))) && (! multithreaded || z$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || z$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || ((0 <= z$w_buff0 && z$w_buff0 <= 1) && (z$w_buff0 == 0 || z$w_buff0 == 1)))) && (! multithreaded || ((0 <= z$mem_tmp && z$mem_tmp <= 1) && (z$mem_tmp == 0 || z$mem_tmp == 1)))) && (! multithreaded || ((0 <= __unbuffered_p1_EAX && __unbuffered_p1_EAX <= 1) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)))) && (! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1)))) && (! multithreaded || ((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 1) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1)))) && (! multithreaded || z$flush_delayed == (_Bool)0)) && (! multithreaded || z$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1))) [2024-06-03 19:21:47,644 INFO L97 edCorrectnessWitness]: Location invariant before [L874-L874] (((((((((((((((((((((((! multithreaded || ((0 <= z$w_buff1 && z$w_buff1 <= 1) && (z$w_buff1 == 0 || z$w_buff1 == 1))) && (! multithreaded || z$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || z$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || ((0 <= a && a <= 1) && (a == 0 || a == 1)))) && (! multithreaded || z$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || z$read_delayed_var == 0)) && (! multithreaded || ((0 <= __unbuffered_p3_EBX && __unbuffered_p3_EBX <= 1) && (__unbuffered_p3_EBX == 0 || __unbuffered_p3_EBX == 1)))) && (! multithreaded || z$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || z$read_delayed == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p3_EAX && __unbuffered_p3_EAX <= 1) && (__unbuffered_p3_EAX == 0 || __unbuffered_p3_EAX == 1)))) && (! multithreaded || z$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || ((0 <= z && z <= 1) && (z == 0 || z == 1)))) && (! multithreaded || z$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || z$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || ((0 <= z$w_buff0 && z$w_buff0 <= 1) && (z$w_buff0 == 0 || z$w_buff0 == 1)))) && (! multithreaded || ((0 <= z$mem_tmp && z$mem_tmp <= 1) && (z$mem_tmp == 0 || z$mem_tmp == 1)))) && (! multithreaded || ((0 <= __unbuffered_p1_EAX && __unbuffered_p1_EAX <= 1) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)))) && (! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1)))) && (! multithreaded || ((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 1) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1)))) && (! multithreaded || z$flush_delayed == (_Bool)0)) && (! multithreaded || z$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1))) [2024-06-03 19:21:47,644 INFO L97 edCorrectnessWitness]: Location invariant before [L871-L871] (((((((((((((((((((((((! multithreaded || ((0 <= z$w_buff1 && z$w_buff1 <= 1) && (z$w_buff1 == 0 || z$w_buff1 == 1))) && (! multithreaded || z$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || z$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || ((0 <= a && a <= 1) && (a == 0 || a == 1)))) && (! multithreaded || z$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || z$read_delayed_var == 0)) && (! multithreaded || ((0 <= __unbuffered_p3_EBX && __unbuffered_p3_EBX <= 1) && (__unbuffered_p3_EBX == 0 || __unbuffered_p3_EBX == 1)))) && (! multithreaded || z$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || z$read_delayed == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p3_EAX && __unbuffered_p3_EAX <= 1) && (__unbuffered_p3_EAX == 0 || __unbuffered_p3_EAX == 1)))) && (! multithreaded || z$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || ((0 <= z && z <= 1) && (z == 0 || z == 1)))) && (! multithreaded || z$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || z$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || ((0 <= z$w_buff0 && z$w_buff0 <= 1) && (z$w_buff0 == 0 || z$w_buff0 == 1)))) && (! multithreaded || ((0 <= z$mem_tmp && z$mem_tmp <= 1) && (z$mem_tmp == 0 || z$mem_tmp == 1)))) && (! multithreaded || ((0 <= __unbuffered_p1_EAX && __unbuffered_p1_EAX <= 1) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)))) && (! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1)))) && (! multithreaded || ((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 1) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1)))) && (! multithreaded || z$flush_delayed == (_Bool)0)) && (! multithreaded || z$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1))) [2024-06-03 19:21:47,644 INFO L97 edCorrectnessWitness]: Location invariant before [L873-L873] (((((((((((((((((((((((! multithreaded || ((0 <= z$w_buff1 && z$w_buff1 <= 1) && (z$w_buff1 == 0 || z$w_buff1 == 1))) && (! multithreaded || z$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || z$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || ((0 <= a && a <= 1) && (a == 0 || a == 1)))) && (! multithreaded || z$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || z$read_delayed_var == 0)) && (! multithreaded || ((0 <= __unbuffered_p3_EBX && __unbuffered_p3_EBX <= 1) && (__unbuffered_p3_EBX == 0 || __unbuffered_p3_EBX == 1)))) && (! multithreaded || z$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || z$read_delayed == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p3_EAX && __unbuffered_p3_EAX <= 1) && (__unbuffered_p3_EAX == 0 || __unbuffered_p3_EAX == 1)))) && (! multithreaded || z$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || ((0 <= z && z <= 1) && (z == 0 || z == 1)))) && (! multithreaded || z$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || z$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || ((0 <= z$w_buff0 && z$w_buff0 <= 1) && (z$w_buff0 == 0 || z$w_buff0 == 1)))) && (! multithreaded || ((0 <= z$mem_tmp && z$mem_tmp <= 1) && (z$mem_tmp == 0 || z$mem_tmp == 1)))) && (! multithreaded || ((0 <= __unbuffered_p1_EAX && __unbuffered_p1_EAX <= 1) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)))) && (! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1)))) && (! multithreaded || ((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 1) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1)))) && (! multithreaded || z$flush_delayed == (_Bool)0)) && (! multithreaded || z$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1))) [2024-06-03 19:21:47,645 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-03 19:21:47,645 INFO L106 edCorrectnessWitness]: ghost_update [L867-L867] multithreaded = 1; [2024-06-03 19:21:47,680 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-03 19:21:47,923 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-03 19:21:47,937 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-03 19:21:48,064 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-03 19:21:48,090 INFO L206 MainTranslator]: Completed translation [2024-06-03 19:21:48,091 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 07:21:48 WrapperNode [2024-06-03 19:21:48,091 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-03 19:21:48,091 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-03 19:21:48,092 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-03 19:21:48,092 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-03 19:21:48,097 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 07:21:48" (1/1) ... [2024-06-03 19:21:48,110 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 07:21:48" (1/1) ... [2024-06-03 19:21:48,138 INFO L138 Inliner]: procedures = 176, calls = 54, calls flagged for inlining = 6, calls inlined = 7, statements flattened = 162 [2024-06-03 19:21:48,139 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-03 19:21:48,139 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-03 19:21:48,139 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-03 19:21:48,139 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-03 19:21:48,148 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 07:21:48" (1/1) ... [2024-06-03 19:21:48,148 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 07:21:48" (1/1) ... [2024-06-03 19:21:48,152 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 07:21:48" (1/1) ... [2024-06-03 19:21:48,169 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2024-06-03 19:21:48,170 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 07:21:48" (1/1) ... [2024-06-03 19:21:48,170 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 07:21:48" (1/1) ... [2024-06-03 19:21:48,179 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 07:21:48" (1/1) ... [2024-06-03 19:21:48,180 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 07:21:48" (1/1) ... [2024-06-03 19:21:48,182 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 07:21:48" (1/1) ... [2024-06-03 19:21:48,183 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 07:21:48" (1/1) ... [2024-06-03 19:21:48,186 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-03 19:21:48,187 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-03 19:21:48,187 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-03 19:21:48,187 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-03 19:21:48,187 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 07:21:48" (1/1) ... [2024-06-03 19:21:48,210 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-03 19:21:48,217 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-03 19:21:48,230 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-06-03 19:21:48,262 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-06-03 19:21:48,275 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-03 19:21:48,275 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-03 19:21:48,276 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-03 19:21:48,276 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-03 19:21:48,276 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-03 19:21:48,276 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-03 19:21:48,277 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-03 19:21:48,277 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-03 19:21:48,277 INFO L130 BoogieDeclarations]: Found specification of procedure P3 [2024-06-03 19:21:48,278 INFO L138 BoogieDeclarations]: Found implementation of procedure P3 [2024-06-03 19:21:48,278 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-03 19:21:48,278 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-03 19:21:48,278 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-03 19:21:48,279 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-03 19:21:48,280 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-03 19:21:48,424 INFO L244 CfgBuilder]: Building ICFG [2024-06-03 19:21:48,427 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-03 19:21:48,732 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-03 19:21:48,732 INFO L293 CfgBuilder]: Performing block encoding [2024-06-03 19:21:48,893 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-03 19:21:48,893 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-03 19:21:48,894 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.06 07:21:48 BoogieIcfgContainer [2024-06-03 19:21:48,894 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-03 19:21:48,896 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-03 19:21:48,896 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-03 19:21:48,899 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-03 19:21:48,899 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 03.06 07:21:46" (1/4) ... [2024-06-03 19:21:48,899 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@38053e88 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 03.06 07:21:48, skipping insertion in model container [2024-06-03 19:21:48,899 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.06 07:21:47" (2/4) ... [2024-06-03 19:21:48,900 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@38053e88 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.06 07:21:48, skipping insertion in model container [2024-06-03 19:21:48,900 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 07:21:48" (3/4) ... [2024-06-03 19:21:48,900 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@38053e88 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.06 07:21:48, skipping insertion in model container [2024-06-03 19:21:48,900 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.06 07:21:48" (4/4) ... [2024-06-03 19:21:48,901 INFO L112 eAbstractionObserver]: Analyzing ICFG mix017_pso.opt_tso.opt.i [2024-06-03 19:21:48,914 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-03 19:21:48,914 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 4 error locations. [2024-06-03 19:21:48,915 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-03 19:21:48,980 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-03 19:21:49,009 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 66 places, 53 transitions, 122 flow [2024-06-03 19:21:49,040 INFO L124 PetriNetUnfolderBase]: 0/49 cut-off events. [2024-06-03 19:21:49,041 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-03 19:21:49,043 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62 conditions, 49 events. 0/49 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 84 event pairs, 0 based on Foata normal form. 0/45 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2024-06-03 19:21:49,043 INFO L82 GeneralOperation]: Start removeDead. Operand has 66 places, 53 transitions, 122 flow [2024-06-03 19:21:49,047 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 56 places, 43 transitions, 98 flow [2024-06-03 19:21:49,058 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-03 19:21:49,065 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;@504c83ae, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-03 19:21:49,065 INFO L358 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2024-06-03 19:21:49,069 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-03 19:21:49,069 INFO L124 PetriNetUnfolderBase]: 0/6 cut-off events. [2024-06-03 19:21:49,069 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-03 19:21:49,069 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:21:49,070 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-06-03 19:21:49,070 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-03 19:21:49,074 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:21:49,074 INFO L85 PathProgramCache]: Analyzing trace with hash 22861328, now seen corresponding path program 1 times [2024-06-03 19:21:49,081 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:21:49,082 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [18676440] [2024-06-03 19:21:49,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:21:49,083 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:21:49,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:21:50,145 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:21:50,145 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:21:50,146 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [18676440] [2024-06-03 19:21:50,146 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [18676440] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:21:50,147 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:21:50,147 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-03 19:21:50,148 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1837657255] [2024-06-03 19:21:50,148 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:21:50,155 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-03 19:21:50,158 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:21:50,180 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-03 19:21:50,180 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-03 19:21:50,262 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 53 [2024-06-03 19:21:50,266 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 43 transitions, 98 flow. Second operand has 3 states, 3 states have (on average 19.0) internal successors, (57), 3 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:21:50,266 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:21:50,266 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 53 [2024-06-03 19:21:50,267 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:21:51,094 INFO L124 PetriNetUnfolderBase]: 4867/7020 cut-off events. [2024-06-03 19:21:51,095 INFO L125 PetriNetUnfolderBase]: For 97/97 co-relation queries the response was YES. [2024-06-03 19:21:51,106 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13934 conditions, 7020 events. 4867/7020 cut-off events. For 97/97 co-relation queries the response was YES. Maximal size of possible extension queue 324. Compared 40295 event pairs, 3534 based on Foata normal form. 1/6803 useless extension candidates. Maximal degree in co-relation 13918. Up to 6693 conditions per place. [2024-06-03 19:21:51,135 INFO L140 encePairwiseOnDemand]: 44/53 looper letters, 42 selfloop transitions, 5 changer transitions 0/57 dead transitions. [2024-06-03 19:21:51,135 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 57 transitions, 229 flow [2024-06-03 19:21:51,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-03 19:21:51,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-03 19:21:51,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 102 transitions. [2024-06-03 19:21:51,145 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6415094339622641 [2024-06-03 19:21:51,146 INFO L175 Difference]: Start difference. First operand has 56 places, 43 transitions, 98 flow. Second operand 3 states and 102 transitions. [2024-06-03 19:21:51,147 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 57 transitions, 229 flow [2024-06-03 19:21:51,149 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 57 transitions, 222 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-06-03 19:21:51,151 INFO L231 Difference]: Finished difference. Result has 55 places, 47 transitions, 133 flow [2024-06-03 19:21:51,153 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=94, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=133, PETRI_PLACES=55, PETRI_TRANSITIONS=47} [2024-06-03 19:21:51,155 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, -1 predicate places. [2024-06-03 19:21:51,156 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 47 transitions, 133 flow [2024-06-03 19:21:51,156 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.0) internal successors, (57), 3 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:21:51,156 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:21:51,156 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:21:51,156 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-03 19:21:51,157 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-03 19:21:51,157 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:21:51,157 INFO L85 PathProgramCache]: Analyzing trace with hash 494924143, now seen corresponding path program 1 times [2024-06-03 19:21:51,157 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:21:51,157 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [134985250] [2024-06-03 19:21:51,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:21:51,158 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:21:51,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:21:51,965 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:21:51,965 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:21:51,965 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [134985250] [2024-06-03 19:21:51,965 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [134985250] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:21:51,966 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:21:51,966 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-03 19:21:51,966 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1351219671] [2024-06-03 19:21:51,966 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:21:51,968 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-03 19:21:51,968 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:21:51,969 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-03 19:21:51,969 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-03 19:21:52,035 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 53 [2024-06-03 19:21:52,035 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 47 transitions, 133 flow. Second operand has 4 states, 4 states have (on average 17.75) internal successors, (71), 4 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:21:52,036 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:21:52,036 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 53 [2024-06-03 19:21:52,036 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:21:52,945 INFO L124 PetriNetUnfolderBase]: 5569/7818 cut-off events. [2024-06-03 19:21:52,945 INFO L125 PetriNetUnfolderBase]: For 1718/1718 co-relation queries the response was YES. [2024-06-03 19:21:52,955 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18007 conditions, 7818 events. 5569/7818 cut-off events. For 1718/1718 co-relation queries the response was YES. Maximal size of possible extension queue 361. Compared 43661 event pairs, 3437 based on Foata normal form. 4/7795 useless extension candidates. Maximal degree in co-relation 17992. Up to 7610 conditions per place. [2024-06-03 19:21:52,987 INFO L140 encePairwiseOnDemand]: 43/53 looper letters, 53 selfloop transitions, 9 changer transitions 0/71 dead transitions. [2024-06-03 19:21:52,987 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 71 transitions, 323 flow [2024-06-03 19:21:52,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-03 19:21:52,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-03 19:21:52,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 130 transitions. [2024-06-03 19:21:52,989 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6132075471698113 [2024-06-03 19:21:52,989 INFO L175 Difference]: Start difference. First operand has 55 places, 47 transitions, 133 flow. Second operand 4 states and 130 transitions. [2024-06-03 19:21:52,989 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 71 transitions, 323 flow [2024-06-03 19:21:52,990 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 71 transitions, 318 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-03 19:21:52,991 INFO L231 Difference]: Finished difference. Result has 58 places, 51 transitions, 181 flow [2024-06-03 19:21:52,991 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=128, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=181, PETRI_PLACES=58, PETRI_TRANSITIONS=51} [2024-06-03 19:21:52,992 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 2 predicate places. [2024-06-03 19:21:52,992 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 51 transitions, 181 flow [2024-06-03 19:21:52,992 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.75) internal successors, (71), 4 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:21:52,993 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:21:52,993 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:21:52,993 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-03 19:21:52,993 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-03 19:21:52,993 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:21:52,993 INFO L85 PathProgramCache]: Analyzing trace with hash -336763800, now seen corresponding path program 1 times [2024-06-03 19:21:52,994 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:21:52,994 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [430508577] [2024-06-03 19:21:52,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:21:52,994 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:21:53,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:21:53,905 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:21:53,906 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:21:53,906 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [430508577] [2024-06-03 19:21:53,906 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [430508577] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:21:53,907 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:21:53,907 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-03 19:21:53,907 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [995914737] [2024-06-03 19:21:53,907 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:21:53,908 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-03 19:21:53,908 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:21:53,909 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-03 19:21:53,909 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-03 19:21:53,974 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 53 [2024-06-03 19:21:53,974 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 51 transitions, 181 flow. Second operand has 6 states, 6 states have (on average 16.5) internal successors, (99), 6 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:21:53,974 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:21:53,974 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 53 [2024-06-03 19:21:53,974 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:21:55,120 INFO L124 PetriNetUnfolderBase]: 7070/9854 cut-off events. [2024-06-03 19:21:55,120 INFO L125 PetriNetUnfolderBase]: For 5873/5873 co-relation queries the response was YES. [2024-06-03 19:21:55,136 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25290 conditions, 9854 events. 7070/9854 cut-off events. For 5873/5873 co-relation queries the response was YES. Maximal size of possible extension queue 424. Compared 54462 event pairs, 3323 based on Foata normal form. 8/9826 useless extension candidates. Maximal degree in co-relation 25273. Up to 9556 conditions per place. [2024-06-03 19:21:55,187 INFO L140 encePairwiseOnDemand]: 42/53 looper letters, 71 selfloop transitions, 16 changer transitions 0/95 dead transitions. [2024-06-03 19:21:55,187 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 95 transitions, 488 flow [2024-06-03 19:21:55,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 19:21:55,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 19:21:55,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 181 transitions. [2024-06-03 19:21:55,192 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5691823899371069 [2024-06-03 19:21:55,192 INFO L175 Difference]: Start difference. First operand has 58 places, 51 transitions, 181 flow. Second operand 6 states and 181 transitions. [2024-06-03 19:21:55,192 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 95 transitions, 488 flow [2024-06-03 19:21:55,196 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 95 transitions, 460 flow, removed 6 selfloop flow, removed 2 redundant places. [2024-06-03 19:21:55,197 INFO L231 Difference]: Finished difference. Result has 62 places, 57 transitions, 243 flow [2024-06-03 19:21:55,198 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=156, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=243, PETRI_PLACES=62, PETRI_TRANSITIONS=57} [2024-06-03 19:21:55,199 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 6 predicate places. [2024-06-03 19:21:55,199 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 57 transitions, 243 flow [2024-06-03 19:21:55,199 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.5) internal successors, (99), 6 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:21:55,199 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:21:55,199 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:21:55,200 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-03 19:21:55,200 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-03 19:21:55,200 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:21:55,200 INFO L85 PathProgramCache]: Analyzing trace with hash -594328058, now seen corresponding path program 1 times [2024-06-03 19:21:55,201 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:21:55,201 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [221513787] [2024-06-03 19:21:55,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:21:55,202 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:21:55,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:21:55,981 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:21:55,981 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:21:55,982 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [221513787] [2024-06-03 19:21:55,982 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [221513787] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:21:55,982 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:21:55,982 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-03 19:21:55,982 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [348404024] [2024-06-03 19:21:55,982 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:21:55,983 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-03 19:21:55,983 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:21:55,983 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-03 19:21:55,983 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-03 19:21:56,063 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 53 [2024-06-03 19:21:56,064 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 57 transitions, 243 flow. Second operand has 6 states, 6 states have (on average 16.666666666666668) internal successors, (100), 6 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:21:56,064 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:21:56,064 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 53 [2024-06-03 19:21:56,064 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:21:57,084 INFO L124 PetriNetUnfolderBase]: 6156/8849 cut-off events. [2024-06-03 19:21:57,085 INFO L125 PetriNetUnfolderBase]: For 9447/9447 co-relation queries the response was YES. [2024-06-03 19:21:57,103 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24892 conditions, 8849 events. 6156/8849 cut-off events. For 9447/9447 co-relation queries the response was YES. Maximal size of possible extension queue 382. Compared 50611 event pairs, 3157 based on Foata normal form. 3/8733 useless extension candidates. Maximal degree in co-relation 24873. Up to 8408 conditions per place. [2024-06-03 19:21:57,136 INFO L140 encePairwiseOnDemand]: 43/53 looper letters, 59 selfloop transitions, 10 changer transitions 0/78 dead transitions. [2024-06-03 19:21:57,137 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 78 transitions, 447 flow [2024-06-03 19:21:57,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-03 19:21:57,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-03 19:21:57,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 136 transitions. [2024-06-03 19:21:57,138 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5132075471698113 [2024-06-03 19:21:57,138 INFO L175 Difference]: Start difference. First operand has 62 places, 57 transitions, 243 flow. Second operand 5 states and 136 transitions. [2024-06-03 19:21:57,138 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 78 transitions, 447 flow [2024-06-03 19:21:57,144 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 78 transitions, 409 flow, removed 6 selfloop flow, removed 3 redundant places. [2024-06-03 19:21:57,145 INFO L231 Difference]: Finished difference. Result has 64 places, 61 transitions, 266 flow [2024-06-03 19:21:57,145 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=205, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=266, PETRI_PLACES=64, PETRI_TRANSITIONS=61} [2024-06-03 19:21:57,146 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 8 predicate places. [2024-06-03 19:21:57,146 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 61 transitions, 266 flow [2024-06-03 19:21:57,146 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.666666666666668) internal successors, (100), 6 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:21:57,146 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:21:57,147 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:21:57,147 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-03 19:21:57,147 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-03 19:21:57,147 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:21:57,147 INFO L85 PathProgramCache]: Analyzing trace with hash -616930185, now seen corresponding path program 1 times [2024-06-03 19:21:57,147 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:21:57,148 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1095237945] [2024-06-03 19:21:57,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:21:57,148 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:21:57,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:21:58,032 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:21:58,032 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:21:58,033 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1095237945] [2024-06-03 19:21:58,033 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1095237945] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:21:58,033 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:21:58,033 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 19:21:58,033 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1486182248] [2024-06-03 19:21:58,033 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:21:58,034 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 19:21:58,034 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:21:58,034 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 19:21:58,034 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-03 19:21:58,121 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 53 [2024-06-03 19:21:58,121 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 61 transitions, 266 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) [2024-06-03 19:21:58,121 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:21:58,121 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 53 [2024-06-03 19:21:58,121 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:21:59,354 INFO L124 PetriNetUnfolderBase]: 7083/9867 cut-off events. [2024-06-03 19:21:59,354 INFO L125 PetriNetUnfolderBase]: For 17210/17232 co-relation queries the response was YES. [2024-06-03 19:21:59,376 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30676 conditions, 9867 events. 7083/9867 cut-off events. For 17210/17232 co-relation queries the response was YES. Maximal size of possible extension queue 426. Compared 54381 event pairs, 3533 based on Foata normal form. 5/9852 useless extension candidates. Maximal degree in co-relation 30655. Up to 9589 conditions per place. [2024-06-03 19:21:59,415 INFO L140 encePairwiseOnDemand]: 42/53 looper letters, 70 selfloop transitions, 21 changer transitions 0/99 dead transitions. [2024-06-03 19:21:59,415 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 99 transitions, 604 flow [2024-06-03 19:21:59,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 19:21:59,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 19:21:59,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 165 transitions. [2024-06-03 19:21:59,417 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5188679245283019 [2024-06-03 19:21:59,417 INFO L175 Difference]: Start difference. First operand has 64 places, 61 transitions, 266 flow. Second operand 6 states and 165 transitions. [2024-06-03 19:21:59,417 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 99 transitions, 604 flow [2024-06-03 19:21:59,420 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 99 transitions, 575 flow, removed 7 selfloop flow, removed 3 redundant places. [2024-06-03 19:21:59,421 INFO L231 Difference]: Finished difference. Result has 67 places, 69 transitions, 354 flow [2024-06-03 19:21:59,421 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=237, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=354, PETRI_PLACES=67, PETRI_TRANSITIONS=69} [2024-06-03 19:21:59,422 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 11 predicate places. [2024-06-03 19:21:59,422 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 69 transitions, 354 flow [2024-06-03 19:21:59,422 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) [2024-06-03 19:21:59,422 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:21:59,422 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:21:59,422 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-03 19:21:59,423 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-03 19:21:59,423 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:21:59,423 INFO L85 PathProgramCache]: Analyzing trace with hash 105209235, now seen corresponding path program 2 times [2024-06-03 19:21:59,423 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:21:59,423 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1469430382] [2024-06-03 19:21:59,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:21:59,424 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:21:59,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:22:00,260 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:22:00,260 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:22:00,260 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1469430382] [2024-06-03 19:22:00,261 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1469430382] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:22:00,261 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:22:00,261 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 19:22:00,261 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [43569651] [2024-06-03 19:22:00,261 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:22:00,261 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 19:22:00,262 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:22:00,262 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 19:22:00,262 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-03 19:22:00,351 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 53 [2024-06-03 19:22:00,351 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 69 transitions, 354 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) [2024-06-03 19:22:00,351 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:22:00,351 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 53 [2024-06-03 19:22:00,351 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:22:01,500 INFO L124 PetriNetUnfolderBase]: 7074/9870 cut-off events. [2024-06-03 19:22:01,500 INFO L125 PetriNetUnfolderBase]: For 25231/25272 co-relation queries the response was YES. [2024-06-03 19:22:01,614 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33350 conditions, 9870 events. 7074/9870 cut-off events. For 25231/25272 co-relation queries the response was YES. Maximal size of possible extension queue 426. Compared 54356 event pairs, 3536 based on Foata normal form. 25/9877 useless extension candidates. Maximal degree in co-relation 33328. Up to 9580 conditions per place. [2024-06-03 19:22:01,657 INFO L140 encePairwiseOnDemand]: 42/53 looper letters, 64 selfloop transitions, 21 changer transitions 0/93 dead transitions. [2024-06-03 19:22:01,661 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 93 transitions, 586 flow [2024-06-03 19:22:01,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 19:22:01,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 19:22:01,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 159 transitions. [2024-06-03 19:22:01,663 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-06-03 19:22:01,663 INFO L175 Difference]: Start difference. First operand has 67 places, 69 transitions, 354 flow. Second operand 6 states and 159 transitions. [2024-06-03 19:22:01,663 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 93 transitions, 586 flow [2024-06-03 19:22:01,676 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 93 transitions, 540 flow, removed 18 selfloop flow, removed 2 redundant places. [2024-06-03 19:22:01,677 INFO L231 Difference]: Finished difference. Result has 71 places, 69 transitions, 361 flow [2024-06-03 19:22:01,678 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=308, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=361, PETRI_PLACES=71, PETRI_TRANSITIONS=69} [2024-06-03 19:22:01,681 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 15 predicate places. [2024-06-03 19:22:01,681 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 69 transitions, 361 flow [2024-06-03 19:22:01,681 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) [2024-06-03 19:22:01,681 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:22:01,682 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:22:01,682 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-03 19:22:01,682 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-03 19:22:01,682 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:22:01,682 INFO L85 PathProgramCache]: Analyzing trace with hash -398159325, now seen corresponding path program 1 times [2024-06-03 19:22:01,683 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:22:01,684 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1747879031] [2024-06-03 19:22:01,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:22:01,685 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:22:01,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:22:02,731 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:22:02,732 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:22:02,732 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1747879031] [2024-06-03 19:22:02,732 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1747879031] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:22:02,732 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:22:02,732 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 19:22:02,732 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1625178182] [2024-06-03 19:22:02,733 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:22:02,733 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 19:22:02,733 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:22:02,733 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 19:22:02,734 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-03 19:22:02,827 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 53 [2024-06-03 19:22:02,827 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 69 transitions, 361 flow. Second operand has 8 states, 8 states have (on average 15.5) internal successors, (124), 8 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:22:02,828 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:22:02,828 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 53 [2024-06-03 19:22:02,828 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:22:04,199 INFO L124 PetriNetUnfolderBase]: 7165/10024 cut-off events. [2024-06-03 19:22:04,199 INFO L125 PetriNetUnfolderBase]: For 28963/29001 co-relation queries the response was YES. [2024-06-03 19:22:04,219 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34240 conditions, 10024 events. 7165/10024 cut-off events. For 28963/29001 co-relation queries the response was YES. Maximal size of possible extension queue 426. Compared 55342 event pairs, 3526 based on Foata normal form. 7/10014 useless extension candidates. Maximal degree in co-relation 34216. Up to 9682 conditions per place. [2024-06-03 19:22:04,255 INFO L140 encePairwiseOnDemand]: 38/53 looper letters, 88 selfloop transitions, 32 changer transitions 0/128 dead transitions. [2024-06-03 19:22:04,256 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 128 transitions, 822 flow [2024-06-03 19:22:04,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:22:04,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:22:04,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 214 transitions. [2024-06-03 19:22:04,257 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5047169811320755 [2024-06-03 19:22:04,257 INFO L175 Difference]: Start difference. First operand has 71 places, 69 transitions, 361 flow. Second operand 8 states and 214 transitions. [2024-06-03 19:22:04,257 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 128 transitions, 822 flow [2024-06-03 19:22:04,272 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 128 transitions, 748 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-06-03 19:22:04,273 INFO L231 Difference]: Finished difference. Result has 75 places, 88 transitions, 513 flow [2024-06-03 19:22:04,274 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=303, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=513, PETRI_PLACES=75, PETRI_TRANSITIONS=88} [2024-06-03 19:22:04,274 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 19 predicate places. [2024-06-03 19:22:04,274 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 88 transitions, 513 flow [2024-06-03 19:22:04,275 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.5) internal successors, (124), 8 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:22:04,275 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:22:04,275 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:22:04,275 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-03 19:22:04,275 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-03 19:22:04,275 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:22:04,275 INFO L85 PathProgramCache]: Analyzing trace with hash -1781527013, now seen corresponding path program 2 times [2024-06-03 19:22:04,276 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:22:04,276 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [319361700] [2024-06-03 19:22:04,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:22:04,276 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:22:04,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:22:05,246 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:22:05,246 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:22:05,246 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [319361700] [2024-06-03 19:22:05,246 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [319361700] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:22:05,246 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:22:05,246 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 19:22:05,247 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1256662325] [2024-06-03 19:22:05,247 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:22:05,247 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 19:22:05,247 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:22:05,247 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 19:22:05,248 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-03 19:22:05,374 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 53 [2024-06-03 19:22:05,374 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 88 transitions, 513 flow. Second operand has 8 states, 8 states have (on average 15.5) internal successors, (124), 8 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:22:05,374 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:22:05,374 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 53 [2024-06-03 19:22:05,374 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:22:06,610 INFO L124 PetriNetUnfolderBase]: 7187/10057 cut-off events. [2024-06-03 19:22:06,610 INFO L125 PetriNetUnfolderBase]: For 39639/39703 co-relation queries the response was YES. [2024-06-03 19:22:06,631 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37266 conditions, 10057 events. 7187/10057 cut-off events. For 39639/39703 co-relation queries the response was YES. Maximal size of possible extension queue 426. Compared 55292 event pairs, 3508 based on Foata normal form. 11/10049 useless extension candidates. Maximal degree in co-relation 37240. Up to 9689 conditions per place. [2024-06-03 19:22:06,671 INFO L140 encePairwiseOnDemand]: 41/53 looper letters, 88 selfloop transitions, 34 changer transitions 0/130 dead transitions. [2024-06-03 19:22:06,672 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 130 transitions, 927 flow [2024-06-03 19:22:06,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 19:22:06,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 19:22:06,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 188 transitions. [2024-06-03 19:22:06,675 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5067385444743935 [2024-06-03 19:22:06,675 INFO L175 Difference]: Start difference. First operand has 75 places, 88 transitions, 513 flow. Second operand 7 states and 188 transitions. [2024-06-03 19:22:06,675 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 130 transitions, 927 flow [2024-06-03 19:22:06,697 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 130 transitions, 869 flow, removed 13 selfloop flow, removed 3 redundant places. [2024-06-03 19:22:06,701 INFO L231 Difference]: Finished difference. Result has 79 places, 92 transitions, 590 flow [2024-06-03 19:22:06,702 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=455, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=590, PETRI_PLACES=79, PETRI_TRANSITIONS=92} [2024-06-03 19:22:06,704 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 23 predicate places. [2024-06-03 19:22:06,705 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 92 transitions, 590 flow [2024-06-03 19:22:06,705 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.5) internal successors, (124), 8 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:22:06,706 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:22:06,706 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:22:06,706 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-03 19:22:06,706 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-03 19:22:06,707 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:22:06,707 INFO L85 PathProgramCache]: Analyzing trace with hash -111260277, now seen corresponding path program 3 times [2024-06-03 19:22:06,707 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:22:06,707 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [245182784] [2024-06-03 19:22:06,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:22:06,707 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:22:06,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:22:07,635 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:22:07,635 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:22:07,635 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [245182784] [2024-06-03 19:22:07,635 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [245182784] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:22:07,635 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:22:07,635 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 19:22:07,635 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2082006876] [2024-06-03 19:22:07,635 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:22:07,636 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 19:22:07,636 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:22:07,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 19:22:07,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-03 19:22:07,731 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 53 [2024-06-03 19:22:07,732 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 92 transitions, 590 flow. Second operand has 8 states, 8 states have (on average 15.5) internal successors, (124), 8 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:22:07,732 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:22:07,732 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 53 [2024-06-03 19:22:07,732 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:22:08,981 INFO L124 PetriNetUnfolderBase]: 7209/10084 cut-off events. [2024-06-03 19:22:08,981 INFO L125 PetriNetUnfolderBase]: For 51736/51794 co-relation queries the response was YES. [2024-06-03 19:22:09,006 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40141 conditions, 10084 events. 7209/10084 cut-off events. For 51736/51794 co-relation queries the response was YES. Maximal size of possible extension queue 426. Compared 55516 event pairs, 3397 based on Foata normal form. 21/10087 useless extension candidates. Maximal degree in co-relation 40114. Up to 9633 conditions per place. [2024-06-03 19:22:09,044 INFO L140 encePairwiseOnDemand]: 41/53 looper letters, 78 selfloop transitions, 50 changer transitions 0/136 dead transitions. [2024-06-03 19:22:09,044 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 136 transitions, 1104 flow [2024-06-03 19:22:09,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 19:22:09,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 19:22:09,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 192 transitions. [2024-06-03 19:22:09,057 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5175202156334232 [2024-06-03 19:22:09,057 INFO L175 Difference]: Start difference. First operand has 79 places, 92 transitions, 590 flow. Second operand 7 states and 192 transitions. [2024-06-03 19:22:09,057 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 136 transitions, 1104 flow [2024-06-03 19:22:09,085 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 136 transitions, 985 flow, removed 31 selfloop flow, removed 5 redundant places. [2024-06-03 19:22:09,087 INFO L231 Difference]: Finished difference. Result has 81 places, 100 transitions, 696 flow [2024-06-03 19:22:09,087 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=493, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=92, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=696, PETRI_PLACES=81, PETRI_TRANSITIONS=100} [2024-06-03 19:22:09,087 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 25 predicate places. [2024-06-03 19:22:09,088 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 100 transitions, 696 flow [2024-06-03 19:22:09,088 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.5) internal successors, (124), 8 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:22:09,088 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:22:09,088 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:22:09,088 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-03 19:22:09,088 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-03 19:22:09,089 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:22:09,089 INFO L85 PathProgramCache]: Analyzing trace with hash -1050460637, now seen corresponding path program 4 times [2024-06-03 19:22:09,089 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:22:09,089 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1015246670] [2024-06-03 19:22:09,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:22:09,089 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:22:09,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:22:10,022 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:22:10,022 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:22:10,023 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1015246670] [2024-06-03 19:22:10,023 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1015246670] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:22:10,023 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:22:10,023 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 19:22:10,023 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2117955708] [2024-06-03 19:22:10,023 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:22:10,023 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 19:22:10,024 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:22:10,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 19:22:10,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-03 19:22:10,121 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 53 [2024-06-03 19:22:10,121 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 100 transitions, 696 flow. Second operand has 8 states, 8 states have (on average 15.5) internal successors, (124), 8 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:22:10,121 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:22:10,121 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 53 [2024-06-03 19:22:10,121 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:22:11,431 INFO L124 PetriNetUnfolderBase]: 7200/10085 cut-off events. [2024-06-03 19:22:11,432 INFO L125 PetriNetUnfolderBase]: For 52599/52657 co-relation queries the response was YES. [2024-06-03 19:22:11,457 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40086 conditions, 10085 events. 7200/10085 cut-off events. For 52599/52657 co-relation queries the response was YES. Maximal size of possible extension queue 426. Compared 55615 event pairs, 3404 based on Foata normal form. 19/10083 useless extension candidates. Maximal degree in co-relation 40058. Up to 9624 conditions per place. [2024-06-03 19:22:11,578 INFO L140 encePairwiseOnDemand]: 41/53 looper letters, 73 selfloop transitions, 50 changer transitions 0/131 dead transitions. [2024-06-03 19:22:11,579 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 131 transitions, 1040 flow [2024-06-03 19:22:11,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 19:22:11,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 19:22:11,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 186 transitions. [2024-06-03 19:22:11,580 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5013477088948787 [2024-06-03 19:22:11,580 INFO L175 Difference]: Start difference. First operand has 81 places, 100 transitions, 696 flow. Second operand 7 states and 186 transitions. [2024-06-03 19:22:11,580 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 131 transitions, 1040 flow [2024-06-03 19:22:11,603 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 131 transitions, 957 flow, removed 28 selfloop flow, removed 3 redundant places. [2024-06-03 19:22:11,604 INFO L231 Difference]: Finished difference. Result has 85 places, 100 transitions, 724 flow [2024-06-03 19:22:11,605 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=613, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=100, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=724, PETRI_PLACES=85, PETRI_TRANSITIONS=100} [2024-06-03 19:22:11,605 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 29 predicate places. [2024-06-03 19:22:11,605 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 100 transitions, 724 flow [2024-06-03 19:22:11,606 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.5) internal successors, (124), 8 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:22:11,606 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:22:11,606 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:22:11,606 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-03 19:22:11,606 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-03 19:22:11,607 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:22:11,607 INFO L85 PathProgramCache]: Analyzing trace with hash -1767587523, now seen corresponding path program 1 times [2024-06-03 19:22:11,607 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:22:11,607 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1873007572] [2024-06-03 19:22:11,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:22:11,607 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:22:11,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:22:12,580 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:22:12,581 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:22:12,581 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1873007572] [2024-06-03 19:22:12,581 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1873007572] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:22:12,581 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:22:12,581 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 19:22:12,581 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1637739980] [2024-06-03 19:22:12,581 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:22:12,581 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 19:22:12,581 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:22:12,582 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 19:22:12,582 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-03 19:22:12,722 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 53 [2024-06-03 19:22:12,723 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 100 transitions, 724 flow. Second operand has 8 states, 8 states have (on average 15.5) internal successors, (124), 8 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:22:12,723 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:22:12,723 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 53 [2024-06-03 19:22:12,723 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:22:14,213 INFO L124 PetriNetUnfolderBase]: 8032/11430 cut-off events. [2024-06-03 19:22:14,213 INFO L125 PetriNetUnfolderBase]: For 61254/61256 co-relation queries the response was YES. [2024-06-03 19:22:14,240 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44908 conditions, 11430 events. 8032/11430 cut-off events. For 61254/61256 co-relation queries the response was YES. Maximal size of possible extension queue 422. Compared 63861 event pairs, 3736 based on Foata normal form. 6/11345 useless extension candidates. Maximal degree in co-relation 44878. Up to 10879 conditions per place. [2024-06-03 19:22:14,281 INFO L140 encePairwiseOnDemand]: 42/53 looper letters, 114 selfloop transitions, 17 changer transitions 0/139 dead transitions. [2024-06-03 19:22:14,281 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 139 transitions, 1151 flow [2024-06-03 19:22:14,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 19:22:14,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 19:22:14,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 182 transitions. [2024-06-03 19:22:14,282 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49056603773584906 [2024-06-03 19:22:14,282 INFO L175 Difference]: Start difference. First operand has 85 places, 100 transitions, 724 flow. Second operand 7 states and 182 transitions. [2024-06-03 19:22:14,282 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 139 transitions, 1151 flow [2024-06-03 19:22:14,313 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 139 transitions, 1010 flow, removed 6 selfloop flow, removed 6 redundant places. [2024-06-03 19:22:14,314 INFO L231 Difference]: Finished difference. Result has 87 places, 107 transitions, 705 flow [2024-06-03 19:22:14,315 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=590, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=100, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=705, PETRI_PLACES=87, PETRI_TRANSITIONS=107} [2024-06-03 19:22:14,315 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 31 predicate places. [2024-06-03 19:22:14,316 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 107 transitions, 705 flow [2024-06-03 19:22:14,316 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.5) internal successors, (124), 8 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:22:14,316 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:22:14,316 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:22:14,316 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-03 19:22:14,316 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-03 19:22:14,317 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:22:14,317 INFO L85 PathProgramCache]: Analyzing trace with hash 1689451299, now seen corresponding path program 1 times [2024-06-03 19:22:14,317 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:22:14,317 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [422848621] [2024-06-03 19:22:14,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:22:14,317 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:22:14,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:22:14,984 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:22:14,985 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:22:14,985 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [422848621] [2024-06-03 19:22:14,985 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [422848621] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:22:14,985 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:22:14,985 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-03 19:22:14,985 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [480984625] [2024-06-03 19:22:14,985 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:22:14,985 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-03 19:22:14,985 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:22:14,986 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-03 19:22:14,986 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-03 19:22:15,056 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 53 [2024-06-03 19:22:15,056 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 107 transitions, 705 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) [2024-06-03 19:22:15,056 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:22:15,056 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 53 [2024-06-03 19:22:15,056 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:22:16,486 INFO L124 PetriNetUnfolderBase]: 7529/11016 cut-off events. [2024-06-03 19:22:16,486 INFO L125 PetriNetUnfolderBase]: For 72636/72656 co-relation queries the response was YES. [2024-06-03 19:22:16,524 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45673 conditions, 11016 events. 7529/11016 cut-off events. For 72636/72656 co-relation queries the response was YES. Maximal size of possible extension queue 431. Compared 63973 event pairs, 3781 based on Foata normal form. 22/10996 useless extension candidates. Maximal degree in co-relation 45641. Up to 10255 conditions per place. [2024-06-03 19:22:16,573 INFO L140 encePairwiseOnDemand]: 44/53 looper letters, 103 selfloop transitions, 10 changer transitions 0/126 dead transitions. [2024-06-03 19:22:16,573 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 126 transitions, 1013 flow [2024-06-03 19:22:16,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-03 19:22:16,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-03 19:22:16,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 133 transitions. [2024-06-03 19:22:16,588 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5018867924528302 [2024-06-03 19:22:16,588 INFO L175 Difference]: Start difference. First operand has 87 places, 107 transitions, 705 flow. Second operand 5 states and 133 transitions. [2024-06-03 19:22:16,588 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 126 transitions, 1013 flow [2024-06-03 19:22:16,636 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 126 transitions, 953 flow, removed 16 selfloop flow, removed 4 redundant places. [2024-06-03 19:22:16,638 INFO L231 Difference]: Finished difference. Result has 88 places, 111 transitions, 718 flow [2024-06-03 19:22:16,638 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=645, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=107, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=97, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=718, PETRI_PLACES=88, PETRI_TRANSITIONS=111} [2024-06-03 19:22:16,638 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 32 predicate places. [2024-06-03 19:22:16,638 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 111 transitions, 718 flow [2024-06-03 19:22:16,639 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) [2024-06-03 19:22:16,639 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:22:16,639 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:22:16,639 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-03 19:22:16,639 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-03 19:22:16,639 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:22:16,639 INFO L85 PathProgramCache]: Analyzing trace with hash 1530852962, now seen corresponding path program 1 times [2024-06-03 19:22:16,639 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:22:16,639 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1967037889] [2024-06-03 19:22:16,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:22:16,639 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:22:16,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:22:17,800 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:22:17,801 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:22:17,801 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1967037889] [2024-06-03 19:22:17,801 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1967037889] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:22:17,801 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:22:17,801 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:22:17,801 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1358865329] [2024-06-03 19:22:17,801 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:22:17,801 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:22:17,801 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:22:17,801 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:22:17,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:22:17,902 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 53 [2024-06-03 19:22:17,903 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 111 transitions, 718 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) [2024-06-03 19:22:17,903 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:22:17,903 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 53 [2024-06-03 19:22:17,903 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:22:19,631 INFO L124 PetriNetUnfolderBase]: 9141/12788 cut-off events. [2024-06-03 19:22:19,632 INFO L125 PetriNetUnfolderBase]: For 109817/109889 co-relation queries the response was YES. [2024-06-03 19:22:19,670 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58441 conditions, 12788 events. 9141/12788 cut-off events. For 109817/109889 co-relation queries the response was YES. Maximal size of possible extension queue 510. Compared 71802 event pairs, 3609 based on Foata normal form. 42/12829 useless extension candidates. Maximal degree in co-relation 58408. Up to 11961 conditions per place. [2024-06-03 19:22:19,726 INFO L140 encePairwiseOnDemand]: 41/53 looper letters, 127 selfloop transitions, 41 changer transitions 0/177 dead transitions. [2024-06-03 19:22:19,726 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 177 transitions, 1408 flow [2024-06-03 19:22:19,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:22:19,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:22:19,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 245 transitions. [2024-06-03 19:22:19,728 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5136268343815513 [2024-06-03 19:22:19,728 INFO L175 Difference]: Start difference. First operand has 88 places, 111 transitions, 718 flow. Second operand 9 states and 245 transitions. [2024-06-03 19:22:19,728 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 177 transitions, 1408 flow [2024-06-03 19:22:19,770 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 177 transitions, 1365 flow, removed 14 selfloop flow, removed 3 redundant places. [2024-06-03 19:22:19,772 INFO L231 Difference]: Finished difference. Result has 94 places, 115 transitions, 846 flow [2024-06-03 19:22:19,772 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=675, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=111, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=846, PETRI_PLACES=94, PETRI_TRANSITIONS=115} [2024-06-03 19:22:19,773 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 38 predicate places. [2024-06-03 19:22:19,773 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 115 transitions, 846 flow [2024-06-03 19:22:19,773 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) [2024-06-03 19:22:19,773 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:22:19,773 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:22:19,773 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-03 19:22:19,773 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-03 19:22:19,774 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:22:19,774 INFO L85 PathProgramCache]: Analyzing trace with hash 1533709922, now seen corresponding path program 2 times [2024-06-03 19:22:19,774 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:22:19,774 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1259365605] [2024-06-03 19:22:19,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:22:19,774 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:22:19,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:22:20,874 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:22:20,874 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:22:20,874 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1259365605] [2024-06-03 19:22:20,874 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1259365605] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:22:20,874 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:22:20,874 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:22:20,874 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [526695809] [2024-06-03 19:22:20,874 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:22:20,875 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:22:20,875 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:22:20,875 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:22:20,875 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:22:20,979 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 53 [2024-06-03 19:22:20,980 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 115 transitions, 846 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) [2024-06-03 19:22:20,980 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:22:20,980 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 53 [2024-06-03 19:22:20,980 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:22:22,700 INFO L124 PetriNetUnfolderBase]: 9087/12710 cut-off events. [2024-06-03 19:22:22,701 INFO L125 PetriNetUnfolderBase]: For 125435/125499 co-relation queries the response was YES. [2024-06-03 19:22:22,734 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59832 conditions, 12710 events. 9087/12710 cut-off events. For 125435/125499 co-relation queries the response was YES. Maximal size of possible extension queue 509. Compared 71367 event pairs, 4109 based on Foata normal form. 48/12757 useless extension candidates. Maximal degree in co-relation 59798. Up to 12111 conditions per place. [2024-06-03 19:22:22,786 INFO L140 encePairwiseOnDemand]: 41/53 looper letters, 119 selfloop transitions, 36 changer transitions 0/164 dead transitions. [2024-06-03 19:22:22,786 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 164 transitions, 1328 flow [2024-06-03 19:22:22,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:22:22,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:22:22,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 215 transitions. [2024-06-03 19:22:22,788 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5070754716981132 [2024-06-03 19:22:22,788 INFO L175 Difference]: Start difference. First operand has 94 places, 115 transitions, 846 flow. Second operand 8 states and 215 transitions. [2024-06-03 19:22:22,788 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 164 transitions, 1328 flow [2024-06-03 19:22:22,843 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 164 transitions, 1259 flow, removed 14 selfloop flow, removed 5 redundant places. [2024-06-03 19:22:22,845 INFO L231 Difference]: Finished difference. Result has 97 places, 115 transitions, 861 flow [2024-06-03 19:22:22,845 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=777, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=115, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=861, PETRI_PLACES=97, PETRI_TRANSITIONS=115} [2024-06-03 19:22:22,845 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 41 predicate places. [2024-06-03 19:22:22,846 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 115 transitions, 861 flow [2024-06-03 19:22:22,846 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) [2024-06-03 19:22:22,846 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:22:22,846 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:22:22,846 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-03 19:22:22,846 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-03 19:22:22,846 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:22:22,846 INFO L85 PathProgramCache]: Analyzing trace with hash 544083054, now seen corresponding path program 3 times [2024-06-03 19:22:22,847 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:22:22,847 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [710914185] [2024-06-03 19:22:22,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:22:22,847 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:22:22,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:22:23,895 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:22:23,895 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:22:23,895 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [710914185] [2024-06-03 19:22:23,895 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [710914185] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:22:23,895 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:22:23,895 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:22:23,895 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1756623688] [2024-06-03 19:22:23,895 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:22:23,895 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:22:23,896 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:22:23,896 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:22:23,896 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:22:24,015 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 53 [2024-06-03 19:22:24,016 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 115 transitions, 861 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) [2024-06-03 19:22:24,016 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:22:24,016 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 53 [2024-06-03 19:22:24,016 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:22:25,772 INFO L124 PetriNetUnfolderBase]: 9215/12903 cut-off events. [2024-06-03 19:22:25,772 INFO L125 PetriNetUnfolderBase]: For 139372/139430 co-relation queries the response was YES. [2024-06-03 19:22:25,806 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61806 conditions, 12903 events. 9215/12903 cut-off events. For 139372/139430 co-relation queries the response was YES. Maximal size of possible extension queue 510. Compared 72784 event pairs, 4159 based on Foata normal form. 56/12953 useless extension candidates. Maximal degree in co-relation 61770. Up to 12228 conditions per place. [2024-06-03 19:22:25,860 INFO L140 encePairwiseOnDemand]: 41/53 looper letters, 97 selfloop transitions, 55 changer transitions 0/161 dead transitions. [2024-06-03 19:22:25,860 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 161 transitions, 1355 flow [2024-06-03 19:22:25,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:22:25,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:22:25,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 216 transitions. [2024-06-03 19:22:25,861 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5094339622641509 [2024-06-03 19:22:25,861 INFO L175 Difference]: Start difference. First operand has 97 places, 115 transitions, 861 flow. Second operand 8 states and 216 transitions. [2024-06-03 19:22:25,861 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 161 transitions, 1355 flow [2024-06-03 19:22:25,929 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 161 transitions, 1273 flow, removed 2 selfloop flow, removed 7 redundant places. [2024-06-03 19:22:25,935 INFO L231 Difference]: Finished difference. Result has 98 places, 117 transitions, 945 flow [2024-06-03 19:22:25,935 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=779, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=115, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=945, PETRI_PLACES=98, PETRI_TRANSITIONS=117} [2024-06-03 19:22:25,936 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 42 predicate places. [2024-06-03 19:22:25,936 INFO L495 AbstractCegarLoop]: Abstraction has has 98 places, 117 transitions, 945 flow [2024-06-03 19:22:25,937 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) [2024-06-03 19:22:25,937 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:22:25,937 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:22:25,937 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-03 19:22:25,937 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)] === [2024-06-03 19:22:25,937 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:22:25,937 INFO L85 PathProgramCache]: Analyzing trace with hash 1649185790, now seen corresponding path program 1 times [2024-06-03 19:22:25,937 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:22:25,938 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2018047538] [2024-06-03 19:22:25,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:22:25,938 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:22:25,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:22:26,960 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:22:26,960 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:22:26,962 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2018047538] [2024-06-03 19:22:26,964 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2018047538] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:22:26,964 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:22:26,964 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:22:26,964 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2146424734] [2024-06-03 19:22:26,964 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:22:26,964 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:22:26,964 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:22:26,965 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:22:26,965 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:22:27,074 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 53 [2024-06-03 19:22:27,074 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 117 transitions, 945 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) [2024-06-03 19:22:27,074 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:22:27,074 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 53 [2024-06-03 19:22:27,074 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:22:28,860 INFO L124 PetriNetUnfolderBase]: 9660/13497 cut-off events. [2024-06-03 19:22:28,860 INFO L125 PetriNetUnfolderBase]: For 157419/157427 co-relation queries the response was YES. [2024-06-03 19:22:28,893 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64901 conditions, 13497 events. 9660/13497 cut-off events. For 157419/157427 co-relation queries the response was YES. Maximal size of possible extension queue 473. Compared 74151 event pairs, 4176 based on Foata normal form. 14/13507 useless extension candidates. Maximal degree in co-relation 64864. Up to 13013 conditions per place. [2024-06-03 19:22:28,945 INFO L140 encePairwiseOnDemand]: 41/53 looper letters, 127 selfloop transitions, 35 changer transitions 0/169 dead transitions. [2024-06-03 19:22:28,945 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 169 transitions, 1498 flow [2024-06-03 19:22:28,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:22:28,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:22:28,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 207 transitions. [2024-06-03 19:22:28,946 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4882075471698113 [2024-06-03 19:22:28,946 INFO L175 Difference]: Start difference. First operand has 98 places, 117 transitions, 945 flow. Second operand 8 states and 207 transitions. [2024-06-03 19:22:28,946 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 169 transitions, 1498 flow [2024-06-03 19:22:29,029 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 169 transitions, 1368 flow, removed 9 selfloop flow, removed 6 redundant places. [2024-06-03 19:22:29,031 INFO L231 Difference]: Finished difference. Result has 101 places, 124 transitions, 988 flow [2024-06-03 19:22:29,031 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=821, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=117, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=988, PETRI_PLACES=101, PETRI_TRANSITIONS=124} [2024-06-03 19:22:29,031 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 45 predicate places. [2024-06-03 19:22:29,031 INFO L495 AbstractCegarLoop]: Abstraction has has 101 places, 124 transitions, 988 flow [2024-06-03 19:22:29,032 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) [2024-06-03 19:22:29,032 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:22:29,032 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:22:29,032 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-03 19:22:29,032 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-03 19:22:29,032 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:22:29,032 INFO L85 PathProgramCache]: Analyzing trace with hash 1615012626, now seen corresponding path program 1 times [2024-06-03 19:22:29,033 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:22:29,033 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1041174297] [2024-06-03 19:22:29,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:22:29,033 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:22:29,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:22:29,821 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:22:29,821 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:22:29,821 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1041174297] [2024-06-03 19:22:29,821 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1041174297] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:22:29,821 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:22:29,821 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 19:22:29,821 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [704172993] [2024-06-03 19:22:29,821 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:22:29,822 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 19:22:29,822 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:22:29,822 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 19:22:29,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-03 19:22:29,886 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 53 [2024-06-03 19:22:29,886 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 124 transitions, 988 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) [2024-06-03 19:22:29,886 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:22:29,886 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 53 [2024-06-03 19:22:29,886 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:22:31,558 INFO L124 PetriNetUnfolderBase]: 9167/12999 cut-off events. [2024-06-03 19:22:31,558 INFO L125 PetriNetUnfolderBase]: For 176717/176734 co-relation queries the response was YES. [2024-06-03 19:22:31,592 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65576 conditions, 12999 events. 9167/12999 cut-off events. For 176717/176734 co-relation queries the response was YES. Maximal size of possible extension queue 471. Compared 73475 event pairs, 4079 based on Foata normal form. 23/12997 useless extension candidates. Maximal degree in co-relation 65537. Up to 12327 conditions per place. [2024-06-03 19:22:31,644 INFO L140 encePairwiseOnDemand]: 43/53 looper letters, 111 selfloop transitions, 35 changer transitions 0/160 dead transitions. [2024-06-03 19:22:31,644 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 160 transitions, 1518 flow [2024-06-03 19:22:31,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 19:22:31,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 19:22:31,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 163 transitions. [2024-06-03 19:22:31,645 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5125786163522013 [2024-06-03 19:22:31,645 INFO L175 Difference]: Start difference. First operand has 101 places, 124 transitions, 988 flow. Second operand 6 states and 163 transitions. [2024-06-03 19:22:31,645 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 160 transitions, 1518 flow [2024-06-03 19:22:31,727 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 160 transitions, 1408 flow, removed 23 selfloop flow, removed 5 redundant places. [2024-06-03 19:22:31,729 INFO L231 Difference]: Finished difference. Result has 102 places, 132 transitions, 1065 flow [2024-06-03 19:22:31,729 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=878, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=124, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1065, PETRI_PLACES=102, PETRI_TRANSITIONS=132} [2024-06-03 19:22:31,729 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 46 predicate places. [2024-06-03 19:22:31,730 INFO L495 AbstractCegarLoop]: Abstraction has has 102 places, 132 transitions, 1065 flow [2024-06-03 19:22:31,730 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) [2024-06-03 19:22:31,730 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:22:31,730 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:22:31,730 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-03 19:22:31,730 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-03 19:22:31,730 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:22:31,731 INFO L85 PathProgramCache]: Analyzing trace with hash -938453290, now seen corresponding path program 4 times [2024-06-03 19:22:31,731 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:22:31,731 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1447824535] [2024-06-03 19:22:31,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:22:31,731 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:22:31,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:22:32,724 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:22:32,725 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:22:32,725 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1447824535] [2024-06-03 19:22:32,725 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1447824535] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:22:32,725 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:22:32,725 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:22:32,725 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1011970857] [2024-06-03 19:22:32,725 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:22:32,725 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:22:32,725 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:22:32,726 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:22:32,726 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:22:32,880 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 53 [2024-06-03 19:22:32,880 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 132 transitions, 1065 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) [2024-06-03 19:22:32,881 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:22:32,881 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 53 [2024-06-03 19:22:32,881 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:22:34,845 INFO L124 PetriNetUnfolderBase]: 9296/13125 cut-off events. [2024-06-03 19:22:34,845 INFO L125 PetriNetUnfolderBase]: For 203354/203412 co-relation queries the response was YES. [2024-06-03 19:22:34,885 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69694 conditions, 13125 events. 9296/13125 cut-off events. For 203354/203412 co-relation queries the response was YES. Maximal size of possible extension queue 500. Compared 74591 event pairs, 4094 based on Foata normal form. 72/13190 useless extension candidates. Maximal degree in co-relation 69654. Up to 12372 conditions per place. [2024-06-03 19:22:34,956 INFO L140 encePairwiseOnDemand]: 41/53 looper letters, 109 selfloop transitions, 57 changer transitions 0/176 dead transitions. [2024-06-03 19:22:34,956 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 176 transitions, 1593 flow [2024-06-03 19:22:34,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:22:34,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:22:34,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 213 transitions. [2024-06-03 19:22:34,958 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5023584905660378 [2024-06-03 19:22:34,958 INFO L175 Difference]: Start difference. First operand has 102 places, 132 transitions, 1065 flow. Second operand 8 states and 213 transitions. [2024-06-03 19:22:34,958 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 176 transitions, 1593 flow [2024-06-03 19:22:35,059 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 176 transitions, 1547 flow, removed 18 selfloop flow, removed 2 redundant places. [2024-06-03 19:22:35,061 INFO L231 Difference]: Finished difference. Result has 108 places, 134 transitions, 1199 flow [2024-06-03 19:22:35,061 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1019, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=132, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1199, PETRI_PLACES=108, PETRI_TRANSITIONS=134} [2024-06-03 19:22:35,062 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 52 predicate places. [2024-06-03 19:22:35,062 INFO L495 AbstractCegarLoop]: Abstraction has has 108 places, 134 transitions, 1199 flow [2024-06-03 19:22:35,062 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) [2024-06-03 19:22:35,062 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:22:35,062 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:22:35,062 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-03 19:22:35,063 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-03 19:22:35,063 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:22:35,063 INFO L85 PathProgramCache]: Analyzing trace with hash -938268592, now seen corresponding path program 2 times [2024-06-03 19:22:35,063 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:22:35,063 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1233544622] [2024-06-03 19:22:35,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:22:35,063 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:22:35,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:22:36,031 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:22:36,031 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:22:36,031 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1233544622] [2024-06-03 19:22:36,031 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1233544622] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:22:36,031 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:22:36,031 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:22:36,031 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [618334365] [2024-06-03 19:22:36,031 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:22:36,031 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:22:36,032 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:22:36,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:22:36,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:22:36,153 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 53 [2024-06-03 19:22:36,153 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 134 transitions, 1199 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) [2024-06-03 19:22:36,153 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:22:36,153 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 53 [2024-06-03 19:22:36,153 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:22:38,073 INFO L124 PetriNetUnfolderBase]: 9844/13772 cut-off events. [2024-06-03 19:22:38,073 INFO L125 PetriNetUnfolderBase]: For 228342/228359 co-relation queries the response was YES. [2024-06-03 19:22:38,109 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74057 conditions, 13772 events. 9844/13772 cut-off events. For 228342/228359 co-relation queries the response was YES. Maximal size of possible extension queue 473. Compared 75580 event pairs, 4180 based on Foata normal form. 20/13789 useless extension candidates. Maximal degree in co-relation 74015. Up to 13270 conditions per place. [2024-06-03 19:22:38,167 INFO L140 encePairwiseOnDemand]: 41/53 looper letters, 138 selfloop transitions, 39 changer transitions 0/184 dead transitions. [2024-06-03 19:22:38,167 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 184 transitions, 1794 flow [2024-06-03 19:22:38,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:22:38,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:22:38,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 204 transitions. [2024-06-03 19:22:38,168 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4811320754716981 [2024-06-03 19:22:38,168 INFO L175 Difference]: Start difference. First operand has 108 places, 134 transitions, 1199 flow. Second operand 8 states and 204 transitions. [2024-06-03 19:22:38,168 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 115 places, 184 transitions, 1794 flow [2024-06-03 19:22:38,287 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 184 transitions, 1650 flow, removed 13 selfloop flow, removed 6 redundant places. [2024-06-03 19:22:38,289 INFO L231 Difference]: Finished difference. Result has 111 places, 142 transitions, 1259 flow [2024-06-03 19:22:38,289 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1063, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=134, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=99, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1259, PETRI_PLACES=111, PETRI_TRANSITIONS=142} [2024-06-03 19:22:38,290 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 55 predicate places. [2024-06-03 19:22:38,290 INFO L495 AbstractCegarLoop]: Abstraction has has 111 places, 142 transitions, 1259 flow [2024-06-03 19:22:38,290 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) [2024-06-03 19:22:38,290 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:22:38,290 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:22:38,290 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-03 19:22:38,290 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-03 19:22:38,290 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:22:38,291 INFO L85 PathProgramCache]: Analyzing trace with hash 2146906588, now seen corresponding path program 3 times [2024-06-03 19:22:38,291 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:22:38,291 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1168242140] [2024-06-03 19:22:38,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:22:38,291 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:22:38,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:22:39,267 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:22:39,268 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:22:39,268 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1168242140] [2024-06-03 19:22:39,268 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1168242140] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:22:39,268 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:22:39,268 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:22:39,268 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1091401621] [2024-06-03 19:22:39,268 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:22:39,268 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:22:39,268 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:22:39,269 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:22:39,269 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:22:39,382 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 53 [2024-06-03 19:22:39,383 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 142 transitions, 1259 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) [2024-06-03 19:22:39,383 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:22:39,383 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 53 [2024-06-03 19:22:39,383 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:22:41,326 INFO L124 PetriNetUnfolderBase]: 9880/13824 cut-off events. [2024-06-03 19:22:41,326 INFO L125 PetriNetUnfolderBase]: For 253297/253314 co-relation queries the response was YES. [2024-06-03 19:22:41,359 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76941 conditions, 13824 events. 9880/13824 cut-off events. For 253297/253314 co-relation queries the response was YES. Maximal size of possible extension queue 473. Compared 75882 event pairs, 4188 based on Foata normal form. 20/13841 useless extension candidates. Maximal degree in co-relation 76897. Up to 13322 conditions per place. [2024-06-03 19:22:41,417 INFO L140 encePairwiseOnDemand]: 41/53 looper letters, 140 selfloop transitions, 43 changer transitions 0/190 dead transitions. [2024-06-03 19:22:41,417 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 190 transitions, 1861 flow [2024-06-03 19:22:41,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:22:41,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:22:41,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 203 transitions. [2024-06-03 19:22:41,418 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47877358490566035 [2024-06-03 19:22:41,418 INFO L175 Difference]: Start difference. First operand has 111 places, 142 transitions, 1259 flow. Second operand 8 states and 203 transitions. [2024-06-03 19:22:41,418 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 190 transitions, 1861 flow [2024-06-03 19:22:41,542 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 190 transitions, 1723 flow, removed 30 selfloop flow, removed 5 redundant places. [2024-06-03 19:22:41,544 INFO L231 Difference]: Finished difference. Result has 114 places, 148 transitions, 1319 flow [2024-06-03 19:22:41,544 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1127, PETRI_DIFFERENCE_MINUEND_PLACES=106, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=142, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=102, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1319, PETRI_PLACES=114, PETRI_TRANSITIONS=148} [2024-06-03 19:22:41,545 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 58 predicate places. [2024-06-03 19:22:41,545 INFO L495 AbstractCegarLoop]: Abstraction has has 114 places, 148 transitions, 1319 flow [2024-06-03 19:22:41,545 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) [2024-06-03 19:22:41,545 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:22:41,545 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:22:41,545 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-03 19:22:41,546 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-03 19:22:41,546 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:22:41,546 INFO L85 PathProgramCache]: Analyzing trace with hash -2139489828, now seen corresponding path program 4 times [2024-06-03 19:22:41,546 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:22:41,546 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [633066402] [2024-06-03 19:22:41,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:22:41,546 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:22:41,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:22:42,521 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:22:42,521 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:22:42,522 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [633066402] [2024-06-03 19:22:42,522 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [633066402] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:22:42,522 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:22:42,522 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:22:42,522 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1590183395] [2024-06-03 19:22:42,522 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:22:42,523 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:22:42,523 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:22:42,523 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:22:42,523 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:22:42,654 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 53 [2024-06-03 19:22:42,664 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 148 transitions, 1319 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) [2024-06-03 19:22:42,664 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:22:42,664 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 53 [2024-06-03 19:22:42,664 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:22:44,441 INFO L124 PetriNetUnfolderBase]: 9865/13787 cut-off events. [2024-06-03 19:22:44,441 INFO L125 PetriNetUnfolderBase]: For 279059/279076 co-relation queries the response was YES. [2024-06-03 19:22:44,502 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78896 conditions, 13787 events. 9865/13787 cut-off events. For 279059/279076 co-relation queries the response was YES. Maximal size of possible extension queue 473. Compared 75413 event pairs, 3892 based on Foata normal form. 20/13804 useless extension candidates. Maximal degree in co-relation 78851. Up to 13173 conditions per place. [2024-06-03 19:22:44,572 INFO L140 encePairwiseOnDemand]: 41/53 looper letters, 133 selfloop transitions, 54 changer transitions 0/194 dead transitions. [2024-06-03 19:22:44,572 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 121 places, 194 transitions, 1909 flow [2024-06-03 19:22:44,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:22:44,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:22:44,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 204 transitions. [2024-06-03 19:22:44,575 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4811320754716981 [2024-06-03 19:22:44,575 INFO L175 Difference]: Start difference. First operand has 114 places, 148 transitions, 1319 flow. Second operand 8 states and 204 transitions. [2024-06-03 19:22:44,575 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 121 places, 194 transitions, 1909 flow [2024-06-03 19:22:44,770 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 194 transitions, 1784 flow, removed 31 selfloop flow, removed 4 redundant places. [2024-06-03 19:22:44,771 INFO L231 Difference]: Finished difference. Result has 118 places, 151 transitions, 1392 flow [2024-06-03 19:22:44,772 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1194, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=148, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=94, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1392, PETRI_PLACES=118, PETRI_TRANSITIONS=151} [2024-06-03 19:22:44,772 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 62 predicate places. [2024-06-03 19:22:44,772 INFO L495 AbstractCegarLoop]: Abstraction has has 118 places, 151 transitions, 1392 flow [2024-06-03 19:22:44,772 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) [2024-06-03 19:22:44,772 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:22:44,772 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:22:44,772 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-03 19:22:44,772 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)] === [2024-06-03 19:22:44,773 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:22:44,773 INFO L85 PathProgramCache]: Analyzing trace with hash 65091586, now seen corresponding path program 2 times [2024-06-03 19:22:44,773 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:22:44,773 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [170383826] [2024-06-03 19:22:44,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:22:44,773 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:22:44,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:22:45,542 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:22:45,542 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:22:45,542 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [170383826] [2024-06-03 19:22:45,542 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [170383826] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:22:45,542 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:22:45,543 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 19:22:45,543 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [891864600] [2024-06-03 19:22:45,543 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:22:45,543 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 19:22:45,543 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:22:45,543 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 19:22:45,543 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-03 19:22:45,625 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 53 [2024-06-03 19:22:45,625 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 151 transitions, 1392 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) [2024-06-03 19:22:45,625 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:22:45,625 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 53 [2024-06-03 19:22:45,626 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:22:47,276 INFO L124 PetriNetUnfolderBase]: 9286/13169 cut-off events. [2024-06-03 19:22:47,276 INFO L125 PetriNetUnfolderBase]: For 301798/301813 co-relation queries the response was YES. [2024-06-03 19:22:47,340 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77169 conditions, 13169 events. 9286/13169 cut-off events. For 301798/301813 co-relation queries the response was YES. Maximal size of possible extension queue 473. Compared 74318 event pairs, 4089 based on Foata normal form. 21/13156 useless extension candidates. Maximal degree in co-relation 77123. Up to 12510 conditions per place. [2024-06-03 19:22:47,412 INFO L140 encePairwiseOnDemand]: 43/53 looper letters, 117 selfloop transitions, 35 changer transitions 0/171 dead transitions. [2024-06-03 19:22:47,412 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 171 transitions, 1756 flow [2024-06-03 19:22:47,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 19:22:47,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 19:22:47,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 154 transitions. [2024-06-03 19:22:47,413 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48427672955974843 [2024-06-03 19:22:47,413 INFO L175 Difference]: Start difference. First operand has 118 places, 151 transitions, 1392 flow. Second operand 6 states and 154 transitions. [2024-06-03 19:22:47,413 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 171 transitions, 1756 flow [2024-06-03 19:22:47,614 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 171 transitions, 1560 flow, removed 46 selfloop flow, removed 6 redundant places. [2024-06-03 19:22:47,616 INFO L231 Difference]: Finished difference. Result has 118 places, 151 transitions, 1275 flow [2024-06-03 19:22:47,616 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1196, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=151, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=116, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1275, PETRI_PLACES=118, PETRI_TRANSITIONS=151} [2024-06-03 19:22:47,616 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 62 predicate places. [2024-06-03 19:22:47,617 INFO L495 AbstractCegarLoop]: Abstraction has has 118 places, 151 transitions, 1275 flow [2024-06-03 19:22:47,617 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) [2024-06-03 19:22:47,617 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:22:47,617 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:22:47,617 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-03 19:22:47,617 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)] === [2024-06-03 19:22:47,617 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:22:47,617 INFO L85 PathProgramCache]: Analyzing trace with hash 59383618, now seen corresponding path program 1 times [2024-06-03 19:22:47,618 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:22:47,618 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1257159867] [2024-06-03 19:22:47,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:22:47,618 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:22:47,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:22:48,390 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:22:48,391 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:22:48,391 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1257159867] [2024-06-03 19:22:48,391 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1257159867] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:22:48,391 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:22:48,391 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 19:22:48,391 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [591292839] [2024-06-03 19:22:48,391 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:22:48,391 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 19:22:48,391 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:22:48,392 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 19:22:48,392 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-03 19:22:48,449 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 53 [2024-06-03 19:22:48,449 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 151 transitions, 1275 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) [2024-06-03 19:22:48,449 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:22:48,449 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 53 [2024-06-03 19:22:48,449 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:22:50,079 INFO L124 PetriNetUnfolderBase]: 8719/12551 cut-off events. [2024-06-03 19:22:50,079 INFO L125 PetriNetUnfolderBase]: For 277197/277199 co-relation queries the response was YES. [2024-06-03 19:22:50,134 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73020 conditions, 12551 events. 8719/12551 cut-off events. For 277197/277199 co-relation queries the response was YES. Maximal size of possible extension queue 434. Compared 71488 event pairs, 3537 based on Foata normal form. 4/12468 useless extension candidates. Maximal degree in co-relation 72973. Up to 11874 conditions per place. [2024-06-03 19:22:50,194 INFO L140 encePairwiseOnDemand]: 43/53 looper letters, 156 selfloop transitions, 21 changer transitions 0/185 dead transitions. [2024-06-03 19:22:50,194 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 185 transitions, 1909 flow [2024-06-03 19:22:50,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 19:22:50,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 19:22:50,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 160 transitions. [2024-06-03 19:22:50,195 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5031446540880503 [2024-06-03 19:22:50,195 INFO L175 Difference]: Start difference. First operand has 118 places, 151 transitions, 1275 flow. Second operand 6 states and 160 transitions. [2024-06-03 19:22:50,195 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 185 transitions, 1909 flow [2024-06-03 19:22:50,384 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 118 places, 185 transitions, 1808 flow, removed 6 selfloop flow, removed 5 redundant places. [2024-06-03 19:22:50,386 INFO L231 Difference]: Finished difference. Result has 119 places, 159 transitions, 1353 flow [2024-06-03 19:22:50,386 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1174, PETRI_DIFFERENCE_MINUEND_PLACES=113, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=151, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=134, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1353, PETRI_PLACES=119, PETRI_TRANSITIONS=159} [2024-06-03 19:22:50,386 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 63 predicate places. [2024-06-03 19:22:50,387 INFO L495 AbstractCegarLoop]: Abstraction has has 119 places, 159 transitions, 1353 flow [2024-06-03 19:22:50,387 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) [2024-06-03 19:22:50,387 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:22:50,387 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:22:50,387 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-03 19:22:50,387 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)] === [2024-06-03 19:22:50,387 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:22:50,387 INFO L85 PathProgramCache]: Analyzing trace with hash 466382308, now seen corresponding path program 2 times [2024-06-03 19:22:50,388 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:22:50,388 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1298256342] [2024-06-03 19:22:50,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:22:50,388 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:22:50,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:22:51,153 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:22:51,153 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:22:51,153 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1298256342] [2024-06-03 19:22:51,153 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1298256342] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:22:51,153 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:22:51,153 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 19:22:51,153 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [411438370] [2024-06-03 19:22:51,153 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:22:51,154 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 19:22:51,154 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:22:51,154 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 19:22:51,154 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-03 19:22:51,243 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 53 [2024-06-03 19:22:51,244 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 159 transitions, 1353 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) [2024-06-03 19:22:51,244 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:22:51,244 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 53 [2024-06-03 19:22:51,244 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:22:52,852 INFO L124 PetriNetUnfolderBase]: 8705/12535 cut-off events. [2024-06-03 19:22:52,852 INFO L125 PetriNetUnfolderBase]: For 300174/300181 co-relation queries the response was YES. [2024-06-03 19:22:52,902 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75399 conditions, 12535 events. 8705/12535 cut-off events. For 300174/300181 co-relation queries the response was YES. Maximal size of possible extension queue 434. Compared 71369 event pairs, 3514 based on Foata normal form. 8/12460 useless extension candidates. Maximal degree in co-relation 75351. Up to 11862 conditions per place. [2024-06-03 19:22:52,962 INFO L140 encePairwiseOnDemand]: 43/53 looper letters, 150 selfloop transitions, 21 changer transitions 0/179 dead transitions. [2024-06-03 19:22:52,962 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 124 places, 179 transitions, 1755 flow [2024-06-03 19:22:52,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 19:22:52,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 19:22:52,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 154 transitions. [2024-06-03 19:22:52,963 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48427672955974843 [2024-06-03 19:22:52,963 INFO L175 Difference]: Start difference. First operand has 119 places, 159 transitions, 1353 flow. Second operand 6 states and 154 transitions. [2024-06-03 19:22:52,963 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 124 places, 179 transitions, 1755 flow [2024-06-03 19:22:53,226 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 179 transitions, 1649 flow, removed 48 selfloop flow, removed 2 redundant places. [2024-06-03 19:22:53,228 INFO L231 Difference]: Finished difference. Result has 123 places, 159 transitions, 1298 flow [2024-06-03 19:22:53,228 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1247, PETRI_DIFFERENCE_MINUEND_PLACES=117, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=159, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=138, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1298, PETRI_PLACES=123, PETRI_TRANSITIONS=159} [2024-06-03 19:22:53,229 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 67 predicate places. [2024-06-03 19:22:53,229 INFO L495 AbstractCegarLoop]: Abstraction has has 123 places, 159 transitions, 1298 flow [2024-06-03 19:22:53,229 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) [2024-06-03 19:22:53,229 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:22:53,229 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:22:53,229 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-03 19:22:53,229 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-03 19:22:53,229 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:22:53,230 INFO L85 PathProgramCache]: Analyzing trace with hash 949322142, now seen corresponding path program 1 times [2024-06-03 19:22:53,230 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:22:53,230 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1839478338] [2024-06-03 19:22:53,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:22:53,230 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:22:53,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:22:54,306 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:22:54,307 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:22:54,307 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1839478338] [2024-06-03 19:22:54,307 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1839478338] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:22:54,307 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:22:54,307 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:22:54,307 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1036650425] [2024-06-03 19:22:54,307 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:22:54,307 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:22:54,308 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:22:54,308 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:22:54,308 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:22:54,428 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 53 [2024-06-03 19:22:54,429 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 159 transitions, 1298 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) [2024-06-03 19:22:54,429 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:22:54,429 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 53 [2024-06-03 19:22:54,429 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:22:56,439 INFO L124 PetriNetUnfolderBase]: 10131/14238 cut-off events. [2024-06-03 19:22:56,439 INFO L125 PetriNetUnfolderBase]: For 379436/379438 co-relation queries the response was YES. [2024-06-03 19:22:56,488 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86853 conditions, 14238 events. 10131/14238 cut-off events. For 379436/379438 co-relation queries the response was YES. Maximal size of possible extension queue 475. Compared 78957 event pairs, 4061 based on Foata normal form. 18/14252 useless extension candidates. Maximal degree in co-relation 86803. Up to 13077 conditions per place. [2024-06-03 19:22:56,551 INFO L140 encePairwiseOnDemand]: 40/53 looper letters, 144 selfloop transitions, 79 changer transitions 0/230 dead transitions. [2024-06-03 19:22:56,551 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 131 places, 230 transitions, 2141 flow [2024-06-03 19:22:56,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:22:56,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:22:56,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 238 transitions. [2024-06-03 19:22:56,552 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4989517819706499 [2024-06-03 19:22:56,552 INFO L175 Difference]: Start difference. First operand has 123 places, 159 transitions, 1298 flow. Second operand 9 states and 238 transitions. [2024-06-03 19:22:56,552 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 131 places, 230 transitions, 2141 flow [2024-06-03 19:22:56,805 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 230 transitions, 2079 flow, removed 5 selfloop flow, removed 6 redundant places. [2024-06-03 19:22:56,807 INFO L231 Difference]: Finished difference. Result has 128 places, 175 transitions, 1652 flow [2024-06-03 19:22:56,807 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1236, PETRI_DIFFERENCE_MINUEND_PLACES=117, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=159, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1652, PETRI_PLACES=128, PETRI_TRANSITIONS=175} [2024-06-03 19:22:56,807 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 72 predicate places. [2024-06-03 19:22:56,808 INFO L495 AbstractCegarLoop]: Abstraction has has 128 places, 175 transitions, 1652 flow [2024-06-03 19:22:56,808 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) [2024-06-03 19:22:56,808 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:22:56,808 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:22:56,808 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-03 19:22:56,808 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-03 19:22:56,808 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:22:56,808 INFO L85 PathProgramCache]: Analyzing trace with hash 1635842786, now seen corresponding path program 2 times [2024-06-03 19:22:56,808 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:22:56,808 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1577966646] [2024-06-03 19:22:56,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:22:56,809 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:22:56,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:22:57,882 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:22:57,882 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:22:57,882 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1577966646] [2024-06-03 19:22:57,882 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1577966646] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:22:57,882 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:22:57,882 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:22:57,882 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [277170774] [2024-06-03 19:22:57,882 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:22:57,882 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:22:57,883 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:22:57,883 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:22:57,883 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:22:58,007 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 53 [2024-06-03 19:22:58,007 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 128 places, 175 transitions, 1652 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) [2024-06-03 19:22:58,008 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:22:58,008 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 53 [2024-06-03 19:22:58,008 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:23:00,147 INFO L124 PetriNetUnfolderBase]: 10373/14631 cut-off events. [2024-06-03 19:23:00,147 INFO L125 PetriNetUnfolderBase]: For 422005/422007 co-relation queries the response was YES. [2024-06-03 19:23:00,210 INFO L83 FinitePrefix]: Finished finitePrefix Result has 92199 conditions, 14631 events. 10373/14631 cut-off events. For 422005/422007 co-relation queries the response was YES. Maximal size of possible extension queue 481. Compared 81865 event pairs, 4115 based on Foata normal form. 18/14642 useless extension candidates. Maximal degree in co-relation 92147. Up to 13600 conditions per place. [2024-06-03 19:23:00,281 INFO L140 encePairwiseOnDemand]: 40/53 looper letters, 146 selfloop transitions, 86 changer transitions 0/239 dead transitions. [2024-06-03 19:23:00,282 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 136 places, 239 transitions, 2465 flow [2024-06-03 19:23:00,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:23:00,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:23:00,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 235 transitions. [2024-06-03 19:23:00,284 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49266247379454925 [2024-06-03 19:23:00,284 INFO L175 Difference]: Start difference. First operand has 128 places, 175 transitions, 1652 flow. Second operand 9 states and 235 transitions. [2024-06-03 19:23:00,284 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 136 places, 239 transitions, 2465 flow [2024-06-03 19:23:00,612 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 132 places, 239 transitions, 2285 flow, removed 30 selfloop flow, removed 4 redundant places. [2024-06-03 19:23:00,614 INFO L231 Difference]: Finished difference. Result has 135 places, 187 transitions, 1869 flow [2024-06-03 19:23:00,615 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1488, PETRI_DIFFERENCE_MINUEND_PLACES=124, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=175, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=96, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1869, PETRI_PLACES=135, PETRI_TRANSITIONS=187} [2024-06-03 19:23:00,615 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 79 predicate places. [2024-06-03 19:23:00,615 INFO L495 AbstractCegarLoop]: Abstraction has has 135 places, 187 transitions, 1869 flow [2024-06-03 19:23:00,615 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) [2024-06-03 19:23:00,615 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:23:00,615 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:23:00,616 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-03 19:23:00,616 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)] === [2024-06-03 19:23:00,616 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:23:00,616 INFO L85 PathProgramCache]: Analyzing trace with hash 1990516720, now seen corresponding path program 3 times [2024-06-03 19:23:00,616 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:23:00,616 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [579074734] [2024-06-03 19:23:00,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:23:00,616 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:23:00,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:23:01,678 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:23:01,678 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:23:01,678 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [579074734] [2024-06-03 19:23:01,678 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [579074734] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:23:01,679 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:23:01,679 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:23:01,679 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1643416334] [2024-06-03 19:23:01,679 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:23:01,679 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:23:01,679 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:23:01,679 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:23:01,679 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:23:01,821 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 53 [2024-06-03 19:23:01,821 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 187 transitions, 1869 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) [2024-06-03 19:23:01,821 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:23:01,821 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 53 [2024-06-03 19:23:01,822 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:23:03,961 INFO L124 PetriNetUnfolderBase]: 10557/14959 cut-off events. [2024-06-03 19:23:03,961 INFO L125 PetriNetUnfolderBase]: For 458428/458430 co-relation queries the response was YES. [2024-06-03 19:23:04,019 INFO L83 FinitePrefix]: Finished finitePrefix Result has 95656 conditions, 14959 events. 10557/14959 cut-off events. For 458428/458430 co-relation queries the response was YES. Maximal size of possible extension queue 486. Compared 84750 event pairs, 3801 based on Foata normal form. 18/14970 useless extension candidates. Maximal degree in co-relation 95601. Up to 12899 conditions per place. [2024-06-03 19:23:04,090 INFO L140 encePairwiseOnDemand]: 40/53 looper letters, 135 selfloop transitions, 106 changer transitions 0/248 dead transitions. [2024-06-03 19:23:04,090 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 143 places, 248 transitions, 2827 flow [2024-06-03 19:23:04,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:23:04,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:23:04,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 237 transitions. [2024-06-03 19:23:04,091 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4968553459119497 [2024-06-03 19:23:04,091 INFO L175 Difference]: Start difference. First operand has 135 places, 187 transitions, 1869 flow. Second operand 9 states and 237 transitions. [2024-06-03 19:23:04,091 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 143 places, 248 transitions, 2827 flow [2024-06-03 19:23:04,460 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 140 places, 248 transitions, 2676 flow, removed 29 selfloop flow, removed 3 redundant places. [2024-06-03 19:23:04,463 INFO L231 Difference]: Finished difference. Result has 142 places, 193 transitions, 2174 flow [2024-06-03 19:23:04,463 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1718, PETRI_DIFFERENCE_MINUEND_PLACES=132, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=187, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=102, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2174, PETRI_PLACES=142, PETRI_TRANSITIONS=193} [2024-06-03 19:23:04,463 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 86 predicate places. [2024-06-03 19:23:04,463 INFO L495 AbstractCegarLoop]: Abstraction has has 142 places, 193 transitions, 2174 flow [2024-06-03 19:23:04,464 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) [2024-06-03 19:23:04,464 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:23:04,464 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:23:04,464 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-03 19:23:04,464 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)] === [2024-06-03 19:23:04,464 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:23:04,464 INFO L85 PathProgramCache]: Analyzing trace with hash 978445964, now seen corresponding path program 4 times [2024-06-03 19:23:04,464 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:23:04,464 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [764571884] [2024-06-03 19:23:04,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:23:04,464 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:23:04,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:23:05,537 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:23:05,537 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:23:05,537 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [764571884] [2024-06-03 19:23:05,537 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [764571884] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:23:05,537 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:23:05,537 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:23:05,538 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1782860409] [2024-06-03 19:23:05,538 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:23:05,538 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:23:05,538 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:23:05,538 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:23:05,539 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:23:05,678 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 53 [2024-06-03 19:23:05,678 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 142 places, 193 transitions, 2174 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) [2024-06-03 19:23:05,678 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:23:05,678 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 53 [2024-06-03 19:23:05,678 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:23:07,904 INFO L124 PetriNetUnfolderBase]: 10518/14912 cut-off events. [2024-06-03 19:23:07,904 INFO L125 PetriNetUnfolderBase]: For 481392/481394 co-relation queries the response was YES. [2024-06-03 19:23:07,976 INFO L83 FinitePrefix]: Finished finitePrefix Result has 96266 conditions, 14912 events. 10518/14912 cut-off events. For 481392/481394 co-relation queries the response was YES. Maximal size of possible extension queue 485. Compared 84418 event pairs, 4142 based on Foata normal form. 18/14923 useless extension candidates. Maximal degree in co-relation 96209. Up to 13823 conditions per place. [2024-06-03 19:23:08,052 INFO L140 encePairwiseOnDemand]: 40/53 looper letters, 153 selfloop transitions, 84 changer transitions 0/244 dead transitions. [2024-06-03 19:23:08,052 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 149 places, 244 transitions, 2784 flow [2024-06-03 19:23:08,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:23:08,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:23:08,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 235 transitions. [2024-06-03 19:23:08,053 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49266247379454925 [2024-06-03 19:23:08,054 INFO L175 Difference]: Start difference. First operand has 142 places, 193 transitions, 2174 flow. Second operand 9 states and 235 transitions. [2024-06-03 19:23:08,054 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 149 places, 244 transitions, 2784 flow [2024-06-03 19:23:08,594 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 144 places, 244 transitions, 2610 flow, removed 40 selfloop flow, removed 5 redundant places. [2024-06-03 19:23:08,596 INFO L231 Difference]: Finished difference. Result has 145 places, 192 transitions, 2131 flow [2024-06-03 19:23:08,597 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1956, PETRI_DIFFERENCE_MINUEND_PLACES=136, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=192, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=84, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=108, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2131, PETRI_PLACES=145, PETRI_TRANSITIONS=192} [2024-06-03 19:23:08,597 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 89 predicate places. [2024-06-03 19:23:08,597 INFO L495 AbstractCegarLoop]: Abstraction has has 145 places, 192 transitions, 2131 flow [2024-06-03 19:23:08,597 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) [2024-06-03 19:23:08,597 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:23:08,597 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:23:08,598 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-03 19:23:08,598 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-03 19:23:08,598 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:23:08,598 INFO L85 PathProgramCache]: Analyzing trace with hash 1840773408, now seen corresponding path program 1 times [2024-06-03 19:23:08,598 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:23:08,598 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2052053722] [2024-06-03 19:23:08,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:23:08,599 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:23:08,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:23:09,530 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:23:09,531 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:23:09,531 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2052053722] [2024-06-03 19:23:09,531 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2052053722] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:23:09,531 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:23:09,531 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 19:23:09,531 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1134049490] [2024-06-03 19:23:09,531 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:23:09,531 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 19:23:09,531 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:23:09,532 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 19:23:09,548 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-03 19:23:09,659 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 53 [2024-06-03 19:23:09,659 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 145 places, 192 transitions, 2131 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) [2024-06-03 19:23:09,659 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:23:09,659 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 53 [2024-06-03 19:23:09,660 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:23:11,624 INFO L124 PetriNetUnfolderBase]: 9400/13648 cut-off events. [2024-06-03 19:23:11,624 INFO L125 PetriNetUnfolderBase]: For 420243/420245 co-relation queries the response was YES. [2024-06-03 19:23:11,687 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87389 conditions, 13648 events. 9400/13648 cut-off events. For 420243/420245 co-relation queries the response was YES. Maximal size of possible extension queue 452. Compared 79910 event pairs, 3568 based on Foata normal form. 4/13614 useless extension candidates. Maximal degree in co-relation 87330. Up to 12935 conditions per place. [2024-06-03 19:23:11,756 INFO L140 encePairwiseOnDemand]: 42/53 looper letters, 199 selfloop transitions, 18 changer transitions 0/225 dead transitions. [2024-06-03 19:23:11,756 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 151 places, 225 transitions, 2729 flow [2024-06-03 19:23:11,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 19:23:11,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 19:23:11,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 178 transitions. [2024-06-03 19:23:11,757 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4797843665768194 [2024-06-03 19:23:11,757 INFO L175 Difference]: Start difference. First operand has 145 places, 192 transitions, 2131 flow. Second operand 7 states and 178 transitions. [2024-06-03 19:23:11,757 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 151 places, 225 transitions, 2729 flow [2024-06-03 19:23:12,108 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 143 places, 225 transitions, 2451 flow, removed 26 selfloop flow, removed 8 redundant places. [2024-06-03 19:23:12,110 INFO L231 Difference]: Finished difference. Result has 144 places, 196 transitions, 1980 flow [2024-06-03 19:23:12,110 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1853, PETRI_DIFFERENCE_MINUEND_PLACES=137, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=192, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=174, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1980, PETRI_PLACES=144, PETRI_TRANSITIONS=196} [2024-06-03 19:23:12,111 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 88 predicate places. [2024-06-03 19:23:12,111 INFO L495 AbstractCegarLoop]: Abstraction has has 144 places, 196 transitions, 1980 flow [2024-06-03 19:23:12,111 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) [2024-06-03 19:23:12,111 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:23:12,111 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:23:12,112 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-03 19:23:12,112 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)] === [2024-06-03 19:23:12,112 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:23:12,112 INFO L85 PathProgramCache]: Analyzing trace with hash -740478740, now seen corresponding path program 2 times [2024-06-03 19:23:12,112 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:23:12,112 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1354711657] [2024-06-03 19:23:12,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:23:12,112 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:23:12,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:23:13,076 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:23:13,077 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:23:13,077 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1354711657] [2024-06-03 19:23:13,077 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1354711657] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:23:13,077 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:23:13,077 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 19:23:13,077 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [904525764] [2024-06-03 19:23:13,077 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:23:13,077 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 19:23:13,077 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:23:13,077 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 19:23:13,078 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-03 19:23:13,156 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 53 [2024-06-03 19:23:13,156 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 144 places, 196 transitions, 1980 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) [2024-06-03 19:23:13,156 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:23:13,156 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 53 [2024-06-03 19:23:13,156 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:23:15,209 INFO L124 PetriNetUnfolderBase]: 9432/13690 cut-off events. [2024-06-03 19:23:15,209 INFO L125 PetriNetUnfolderBase]: For 441466/441468 co-relation queries the response was YES. [2024-06-03 19:23:15,273 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89228 conditions, 13690 events. 9432/13690 cut-off events. For 441466/441468 co-relation queries the response was YES. Maximal size of possible extension queue 452. Compared 80047 event pairs, 3546 based on Foata normal form. 4/13651 useless extension candidates. Maximal degree in co-relation 89170. Up to 12866 conditions per place. [2024-06-03 19:23:15,340 INFO L140 encePairwiseOnDemand]: 42/53 looper letters, 192 selfloop transitions, 35 changer transitions 0/235 dead transitions. [2024-06-03 19:23:15,340 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 150 places, 235 transitions, 2800 flow [2024-06-03 19:23:15,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 19:23:15,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 19:23:15,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 184 transitions. [2024-06-03 19:23:15,341 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49595687331536387 [2024-06-03 19:23:15,341 INFO L175 Difference]: Start difference. First operand has 144 places, 196 transitions, 1980 flow. Second operand 7 states and 184 transitions. [2024-06-03 19:23:15,341 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 150 places, 235 transitions, 2800 flow [2024-06-03 19:23:15,704 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 145 places, 235 transitions, 2703 flow, removed 33 selfloop flow, removed 5 redundant places. [2024-06-03 19:23:15,707 INFO L231 Difference]: Finished difference. Result has 146 places, 204 transitions, 2134 flow [2024-06-03 19:23:15,707 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1883, PETRI_DIFFERENCE_MINUEND_PLACES=139, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=196, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=165, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2134, PETRI_PLACES=146, PETRI_TRANSITIONS=204} [2024-06-03 19:23:15,707 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 90 predicate places. [2024-06-03 19:23:15,708 INFO L495 AbstractCegarLoop]: Abstraction has has 146 places, 204 transitions, 2134 flow [2024-06-03 19:23:15,708 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) [2024-06-03 19:23:15,708 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:23:15,708 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:23:15,708 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-03 19:23:15,708 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-03 19:23:15,708 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:23:15,708 INFO L85 PathProgramCache]: Analyzing trace with hash 1572950880, now seen corresponding path program 3 times [2024-06-03 19:23:15,708 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:23:15,708 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1944945343] [2024-06-03 19:23:15,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:23:15,708 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:23:15,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:23:16,591 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:23:16,591 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:23:16,591 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1944945343] [2024-06-03 19:23:16,591 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1944945343] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:23:16,591 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:23:16,592 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 19:23:16,592 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [698749335] [2024-06-03 19:23:16,592 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:23:16,592 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 19:23:16,592 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:23:16,592 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 19:23:16,592 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-03 19:23:16,701 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 53 [2024-06-03 19:23:16,702 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 146 places, 204 transitions, 2134 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) [2024-06-03 19:23:16,702 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:23:16,702 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 53 [2024-06-03 19:23:16,702 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:23:18,777 INFO L124 PetriNetUnfolderBase]: 9418/13671 cut-off events. [2024-06-03 19:23:18,777 INFO L125 PetriNetUnfolderBase]: For 471836/471838 co-relation queries the response was YES. [2024-06-03 19:23:18,838 INFO L83 FinitePrefix]: Finished finitePrefix Result has 91643 conditions, 13671 events. 9418/13671 cut-off events. For 471836/471838 co-relation queries the response was YES. Maximal size of possible extension queue 452. Compared 79903 event pairs, 3513 based on Foata normal form. 4/13636 useless extension candidates. Maximal degree in co-relation 91584. Up to 12854 conditions per place. [2024-06-03 19:23:18,905 INFO L140 encePairwiseOnDemand]: 42/53 looper letters, 186 selfloop transitions, 35 changer transitions 0/229 dead transitions. [2024-06-03 19:23:18,905 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 152 places, 229 transitions, 2650 flow [2024-06-03 19:23:18,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 19:23:18,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 19:23:18,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 178 transitions. [2024-06-03 19:23:18,906 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4797843665768194 [2024-06-03 19:23:18,906 INFO L175 Difference]: Start difference. First operand has 146 places, 204 transitions, 2134 flow. Second operand 7 states and 178 transitions. [2024-06-03 19:23:18,906 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 152 places, 229 transitions, 2650 flow [2024-06-03 19:23:19,366 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 149 places, 229 transitions, 2504 flow, removed 63 selfloop flow, removed 3 redundant places. [2024-06-03 19:23:19,368 INFO L231 Difference]: Finished difference. Result has 150 places, 204 transitions, 2067 flow [2024-06-03 19:23:19,368 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1988, PETRI_DIFFERENCE_MINUEND_PLACES=143, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=204, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=169, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2067, PETRI_PLACES=150, PETRI_TRANSITIONS=204} [2024-06-03 19:23:19,369 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 94 predicate places. [2024-06-03 19:23:19,369 INFO L495 AbstractCegarLoop]: Abstraction has has 150 places, 204 transitions, 2067 flow [2024-06-03 19:23:19,369 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) [2024-06-03 19:23:19,369 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:23:19,369 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:23:19,369 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-03 19:23:19,370 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-03 19:23:19,370 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:23:19,370 INFO L85 PathProgramCache]: Analyzing trace with hash 2018271162, now seen corresponding path program 1 times [2024-06-03 19:23:19,370 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:23:19,370 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1240343912] [2024-06-03 19:23:19,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:23:19,370 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:23:19,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:23:20,766 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:23:20,766 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:23:20,766 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1240343912] [2024-06-03 19:23:20,766 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1240343912] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:23:20,766 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:23:20,766 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 19:23:20,766 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1444648020] [2024-06-03 19:23:20,767 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:23:20,767 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 19:23:20,767 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:23:20,767 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 19:23:20,767 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-03 19:23:20,879 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 53 [2024-06-03 19:23:20,880 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 150 places, 204 transitions, 2067 flow. Second operand has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:23:20,880 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:23:20,880 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 53 [2024-06-03 19:23:20,880 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:23:22,898 INFO L124 PetriNetUnfolderBase]: 8882/13073 cut-off events. [2024-06-03 19:23:22,898 INFO L125 PetriNetUnfolderBase]: For 492031/492048 co-relation queries the response was YES. [2024-06-03 19:23:22,959 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88669 conditions, 13073 events. 8882/13073 cut-off events. For 492031/492048 co-relation queries the response was YES. Maximal size of possible extension queue 451. Compared 78296 event pairs, 3472 based on Foata normal form. 19/13006 useless extension candidates. Maximal degree in co-relation 88608. Up to 12151 conditions per place. [2024-06-03 19:23:23,025 INFO L140 encePairwiseOnDemand]: 43/53 looper letters, 197 selfloop transitions, 17 changer transitions 0/234 dead transitions. [2024-06-03 19:23:23,025 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 156 places, 234 transitions, 2672 flow [2024-06-03 19:23:23,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 19:23:23,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 19:23:23,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 177 transitions. [2024-06-03 19:23:23,026 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.477088948787062 [2024-06-03 19:23:23,026 INFO L175 Difference]: Start difference. First operand has 150 places, 204 transitions, 2067 flow. Second operand 7 states and 177 transitions. [2024-06-03 19:23:23,026 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 156 places, 234 transitions, 2672 flow [2024-06-03 19:23:23,398 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 150 places, 234 transitions, 2562 flow, removed 11 selfloop flow, removed 6 redundant places. [2024-06-03 19:23:23,401 INFO L231 Difference]: Finished difference. Result has 152 places, 211 transitions, 2119 flow [2024-06-03 19:23:23,401 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1964, PETRI_DIFFERENCE_MINUEND_PLACES=144, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=204, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=190, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2119, PETRI_PLACES=152, PETRI_TRANSITIONS=211} [2024-06-03 19:23:23,401 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 96 predicate places. [2024-06-03 19:23:23,402 INFO L495 AbstractCegarLoop]: Abstraction has has 152 places, 211 transitions, 2119 flow [2024-06-03 19:23:23,402 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.875) internal successors, (135), 8 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:23:23,402 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:23:23,402 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:23:23,402 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-03 19:23:23,402 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-03 19:23:23,402 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:23:23,402 INFO L85 PathProgramCache]: Analyzing trace with hash 1199349309, now seen corresponding path program 1 times [2024-06-03 19:23:23,402 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:23:23,403 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1648267229] [2024-06-03 19:23:23,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:23:23,403 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:23:23,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:23:24,241 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:23:24,242 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:23:24,242 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1648267229] [2024-06-03 19:23:24,242 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1648267229] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:23:24,242 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:23:24,242 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-03 19:23:24,242 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [735332585] [2024-06-03 19:23:24,242 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:23:24,242 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-03 19:23:24,242 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:23:24,243 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-03 19:23:24,243 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-03 19:23:24,324 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 53 [2024-06-03 19:23:24,325 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 152 places, 211 transitions, 2119 flow. Second operand has 6 states, 6 states have (on average 18.666666666666668) internal successors, (112), 6 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) [2024-06-03 19:23:24,325 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:23:24,325 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 53 [2024-06-03 19:23:24,325 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:23:26,062 INFO L124 PetriNetUnfolderBase]: 8467/12641 cut-off events. [2024-06-03 19:23:26,062 INFO L125 PetriNetUnfolderBase]: For 524512/524589 co-relation queries the response was YES. [2024-06-03 19:23:26,126 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89683 conditions, 12641 events. 8467/12641 cut-off events. For 524512/524589 co-relation queries the response was YES. Maximal size of possible extension queue 469. Compared 78220 event pairs, 3263 based on Foata normal form. 16/12460 useless extension candidates. Maximal degree in co-relation 89620. Up to 11541 conditions per place. [2024-06-03 19:23:26,192 INFO L140 encePairwiseOnDemand]: 45/53 looper letters, 188 selfloop transitions, 10 changer transitions 0/226 dead transitions. [2024-06-03 19:23:26,193 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 156 places, 226 transitions, 2621 flow [2024-06-03 19:23:26,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-03 19:23:26,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-03 19:23:26,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 131 transitions. [2024-06-03 19:23:26,193 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49433962264150944 [2024-06-03 19:23:26,193 INFO L175 Difference]: Start difference. First operand has 152 places, 211 transitions, 2119 flow. Second operand 5 states and 131 transitions. [2024-06-03 19:23:26,193 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 156 places, 226 transitions, 2621 flow [2024-06-03 19:23:26,602 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 152 places, 226 transitions, 2523 flow, removed 35 selfloop flow, removed 4 redundant places. [2024-06-03 19:23:26,604 INFO L231 Difference]: Finished difference. Result has 153 places, 215 transitions, 2128 flow [2024-06-03 19:23:26,604 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=2021, PETRI_DIFFERENCE_MINUEND_PLACES=148, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=211, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=201, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=2128, PETRI_PLACES=153, PETRI_TRANSITIONS=215} [2024-06-03 19:23:26,605 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 97 predicate places. [2024-06-03 19:23:26,605 INFO L495 AbstractCegarLoop]: Abstraction has has 153 places, 215 transitions, 2128 flow [2024-06-03 19:23:26,605 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.666666666666668) internal successors, (112), 6 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) [2024-06-03 19:23:26,605 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:23:26,605 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:23:26,605 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-03 19:23:26,606 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-03 19:23:26,606 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:23:26,606 INFO L85 PathProgramCache]: Analyzing trace with hash 25575521, now seen corresponding path program 1 times [2024-06-03 19:23:26,606 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:23:26,606 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [373710140] [2024-06-03 19:23:26,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:23:26,606 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:23:26,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:23:27,640 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:23:27,640 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:23:27,640 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [373710140] [2024-06-03 19:23:27,640 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [373710140] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:23:27,640 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:23:27,640 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:23:27,640 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1109977053] [2024-06-03 19:23:27,640 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:23:27,640 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:23:27,641 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:23:27,641 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:23:27,641 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:23:27,740 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 53 [2024-06-03 19:23:27,740 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 153 places, 215 transitions, 2128 flow. Second operand has 9 states, 9 states have (on average 14.666666666666666) internal successors, (132), 9 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:23:27,740 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:23:27,740 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 53 [2024-06-03 19:23:27,740 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:23:30,109 INFO L124 PetriNetUnfolderBase]: 10748/15275 cut-off events. [2024-06-03 19:23:30,109 INFO L125 PetriNetUnfolderBase]: For 674542/674569 co-relation queries the response was YES. [2024-06-03 19:23:30,175 INFO L83 FinitePrefix]: Finished finitePrefix Result has 109751 conditions, 15275 events. 10748/15275 cut-off events. For 674542/674569 co-relation queries the response was YES. Maximal size of possible extension queue 492. Compared 87680 event pairs, 4952 based on Foata normal form. 21/15285 useless extension candidates. Maximal degree in co-relation 109687. Up to 14411 conditions per place. [2024-06-03 19:23:30,251 INFO L140 encePairwiseOnDemand]: 41/53 looper letters, 220 selfloop transitions, 65 changer transitions 0/292 dead transitions. [2024-06-03 19:23:30,251 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 160 places, 292 transitions, 3707 flow [2024-06-03 19:23:30,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:23:30,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:23:30,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 203 transitions. [2024-06-03 19:23:30,252 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47877358490566035 [2024-06-03 19:23:30,253 INFO L175 Difference]: Start difference. First operand has 153 places, 215 transitions, 2128 flow. Second operand 8 states and 203 transitions. [2024-06-03 19:23:30,253 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 160 places, 292 transitions, 3707 flow [2024-06-03 19:23:30,858 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 157 places, 292 transitions, 3626 flow, removed 32 selfloop flow, removed 3 redundant places. [2024-06-03 19:23:30,861 INFO L231 Difference]: Finished difference. Result has 162 places, 250 transitions, 2774 flow [2024-06-03 19:23:30,862 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=2049, PETRI_DIFFERENCE_MINUEND_PLACES=150, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=215, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=170, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2774, PETRI_PLACES=162, PETRI_TRANSITIONS=250} [2024-06-03 19:23:30,862 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 106 predicate places. [2024-06-03 19:23:30,862 INFO L495 AbstractCegarLoop]: Abstraction has has 162 places, 250 transitions, 2774 flow [2024-06-03 19:23:30,862 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.666666666666666) internal successors, (132), 9 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:23:30,862 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:23:30,862 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:23:30,862 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-03 19:23:30,862 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-03 19:23:30,863 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:23:30,863 INFO L85 PathProgramCache]: Analyzing trace with hash 1478695205, now seen corresponding path program 2 times [2024-06-03 19:23:30,863 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:23:30,863 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [440485470] [2024-06-03 19:23:30,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:23:30,863 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:23:30,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:23:31,669 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:23:31,669 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:23:31,669 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [440485470] [2024-06-03 19:23:31,670 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [440485470] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:23:31,670 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:23:31,670 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 19:23:31,670 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1868671489] [2024-06-03 19:23:31,670 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:23:31,670 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 19:23:31,671 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:23:31,671 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 19:23:31,671 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2024-06-03 19:23:31,772 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 53 [2024-06-03 19:23:31,772 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 162 places, 250 transitions, 2774 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) [2024-06-03 19:23:31,772 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:23:31,772 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 53 [2024-06-03 19:23:31,773 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:23:34,368 INFO L124 PetriNetUnfolderBase]: 11070/15719 cut-off events. [2024-06-03 19:23:34,368 INFO L125 PetriNetUnfolderBase]: For 735195/735208 co-relation queries the response was YES. [2024-06-03 19:23:34,463 INFO L83 FinitePrefix]: Finished finitePrefix Result has 117297 conditions, 15719 events. 11070/15719 cut-off events. For 735195/735208 co-relation queries the response was YES. Maximal size of possible extension queue 493. Compared 90317 event pairs, 4987 based on Foata normal form. 16/15728 useless extension candidates. Maximal degree in co-relation 117228. Up to 14680 conditions per place. [2024-06-03 19:23:34,551 INFO L140 encePairwiseOnDemand]: 39/53 looper letters, 228 selfloop transitions, 109 changer transitions 0/344 dead transitions. [2024-06-03 19:23:34,552 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 169 places, 344 transitions, 4806 flow [2024-06-03 19:23:34,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:23:34,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:23:34,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 217 transitions. [2024-06-03 19:23:34,553 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5117924528301887 [2024-06-03 19:23:34,553 INFO L175 Difference]: Start difference. First operand has 162 places, 250 transitions, 2774 flow. Second operand 8 states and 217 transitions. [2024-06-03 19:23:34,553 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 169 places, 344 transitions, 4806 flow [2024-06-03 19:23:35,551 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 168 places, 344 transitions, 4502 flow, removed 151 selfloop flow, removed 1 redundant places. [2024-06-03 19:23:35,554 INFO L231 Difference]: Finished difference. Result has 172 places, 296 transitions, 3615 flow [2024-06-03 19:23:35,555 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=2666, PETRI_DIFFERENCE_MINUEND_PLACES=161, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=250, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=179, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3615, PETRI_PLACES=172, PETRI_TRANSITIONS=296} [2024-06-03 19:23:35,555 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 116 predicate places. [2024-06-03 19:23:35,555 INFO L495 AbstractCegarLoop]: Abstraction has has 172 places, 296 transitions, 3615 flow [2024-06-03 19:23:35,555 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) [2024-06-03 19:23:35,555 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:23:35,555 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:23:35,555 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-03 19:23:35,555 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-03 19:23:35,556 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:23:35,556 INFO L85 PathProgramCache]: Analyzing trace with hash -1724892951, now seen corresponding path program 3 times [2024-06-03 19:23:35,556 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:23:35,556 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [728765398] [2024-06-03 19:23:35,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:23:35,556 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:23:35,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:23:36,408 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:23:36,408 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:23:36,408 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [728765398] [2024-06-03 19:23:36,409 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [728765398] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:23:36,409 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:23:36,409 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 19:23:36,409 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [95393368] [2024-06-03 19:23:36,409 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:23:36,409 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 19:23:36,409 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:23:36,410 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 19:23:36,410 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2024-06-03 19:23:36,474 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 53 [2024-06-03 19:23:36,474 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 172 places, 296 transitions, 3615 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) [2024-06-03 19:23:36,474 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:23:36,474 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 53 [2024-06-03 19:23:36,474 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:23:39,223 INFO L124 PetriNetUnfolderBase]: 11138/15813 cut-off events. [2024-06-03 19:23:39,223 INFO L125 PetriNetUnfolderBase]: For 765056/765078 co-relation queries the response was YES. [2024-06-03 19:23:39,348 INFO L83 FinitePrefix]: Finished finitePrefix Result has 119739 conditions, 15813 events. 11138/15813 cut-off events. For 765056/765078 co-relation queries the response was YES. Maximal size of possible extension queue 492. Compared 90824 event pairs, 4951 based on Foata normal form. 25/15831 useless extension candidates. Maximal degree in co-relation 119664. Up to 14740 conditions per place. [2024-06-03 19:23:39,435 INFO L140 encePairwiseOnDemand]: 39/53 looper letters, 225 selfloop transitions, 123 changer transitions 0/355 dead transitions. [2024-06-03 19:23:39,435 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 179 places, 355 transitions, 5072 flow [2024-06-03 19:23:39,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:23:39,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:23:39,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 213 transitions. [2024-06-03 19:23:39,436 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5023584905660378 [2024-06-03 19:23:39,437 INFO L175 Difference]: Start difference. First operand has 172 places, 296 transitions, 3615 flow. Second operand 8 states and 213 transitions. [2024-06-03 19:23:39,437 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 179 places, 355 transitions, 5072 flow [2024-06-03 19:23:40,611 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 176 places, 355 transitions, 4811 flow, removed 68 selfloop flow, removed 3 redundant places. [2024-06-03 19:23:40,616 INFO L231 Difference]: Finished difference. Result has 179 places, 313 transitions, 3979 flow [2024-06-03 19:23:40,616 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=3368, PETRI_DIFFERENCE_MINUEND_PLACES=169, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=296, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=106, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=187, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3979, PETRI_PLACES=179, PETRI_TRANSITIONS=313} [2024-06-03 19:23:40,616 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 123 predicate places. [2024-06-03 19:23:40,616 INFO L495 AbstractCegarLoop]: Abstraction has has 179 places, 313 transitions, 3979 flow [2024-06-03 19:23:40,616 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) [2024-06-03 19:23:40,617 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:23:40,617 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:23:40,617 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-03 19:23:40,617 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-03 19:23:40,617 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:23:40,617 INFO L85 PathProgramCache]: Analyzing trace with hash -1435215829, now seen corresponding path program 4 times [2024-06-03 19:23:40,617 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:23:40,617 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [902642325] [2024-06-03 19:23:40,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:23:40,617 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:23:40,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:23:41,791 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:23:41,792 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:23:41,792 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [902642325] [2024-06-03 19:23:41,792 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [902642325] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:23:41,792 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:23:41,792 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:23:41,792 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1366280005] [2024-06-03 19:23:41,792 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:23:41,792 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:23:41,792 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:23:41,793 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:23:41,793 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:23:41,866 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 53 [2024-06-03 19:23:41,866 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 179 places, 313 transitions, 3979 flow. Second operand has 9 states, 9 states have (on average 14.666666666666666) internal successors, (132), 9 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:23:41,866 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:23:41,866 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 53 [2024-06-03 19:23:41,866 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:23:44,961 INFO L124 PetriNetUnfolderBase]: 11284/16014 cut-off events. [2024-06-03 19:23:44,961 INFO L125 PetriNetUnfolderBase]: For 809535/809562 co-relation queries the response was YES. [2024-06-03 19:23:45,043 INFO L83 FinitePrefix]: Finished finitePrefix Result has 123009 conditions, 16014 events. 11284/16014 cut-off events. For 809535/809562 co-relation queries the response was YES. Maximal size of possible extension queue 492. Compared 91883 event pairs, 5002 based on Foata normal form. 25/16028 useless extension candidates. Maximal degree in co-relation 122931. Up to 14874 conditions per place. [2024-06-03 19:23:45,129 INFO L140 encePairwiseOnDemand]: 41/53 looper letters, 219 selfloop transitions, 142 changer transitions 0/368 dead transitions. [2024-06-03 19:23:45,129 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 186 places, 368 transitions, 5611 flow [2024-06-03 19:23:45,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:23:45,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:23:45,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 198 transitions. [2024-06-03 19:23:45,130 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4669811320754717 [2024-06-03 19:23:45,131 INFO L175 Difference]: Start difference. First operand has 179 places, 313 transitions, 3979 flow. Second operand 8 states and 198 transitions. [2024-06-03 19:23:45,131 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 186 places, 368 transitions, 5611 flow [2024-06-03 19:23:46,200 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 182 places, 368 transitions, 5352 flow, removed 48 selfloop flow, removed 4 redundant places. [2024-06-03 19:23:46,204 INFO L231 Difference]: Finished difference. Result has 184 places, 334 transitions, 4589 flow [2024-06-03 19:23:46,205 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=3741, PETRI_DIFFERENCE_MINUEND_PLACES=175, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=313, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=121, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=191, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4589, PETRI_PLACES=184, PETRI_TRANSITIONS=334} [2024-06-03 19:23:46,205 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 128 predicate places. [2024-06-03 19:23:46,205 INFO L495 AbstractCegarLoop]: Abstraction has has 184 places, 334 transitions, 4589 flow [2024-06-03 19:23:46,205 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.666666666666666) internal successors, (132), 9 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:23:46,205 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:23:46,205 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:23:46,205 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-03 19:23:46,206 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-03 19:23:46,206 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:23:46,206 INFO L85 PathProgramCache]: Analyzing trace with hash -2986463, now seen corresponding path program 5 times [2024-06-03 19:23:46,206 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:23:46,206 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [393289873] [2024-06-03 19:23:46,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:23:46,206 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:23:46,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:23:47,201 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:23:47,201 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:23:47,201 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [393289873] [2024-06-03 19:23:47,202 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [393289873] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:23:47,202 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:23:47,202 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 19:23:47,202 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1865423254] [2024-06-03 19:23:47,202 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:23:47,202 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 19:23:47,202 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:23:47,202 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 19:23:47,203 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-03 19:23:47,256 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 53 [2024-06-03 19:23:47,257 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 184 places, 334 transitions, 4589 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) [2024-06-03 19:23:47,257 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:23:47,257 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 53 [2024-06-03 19:23:47,257 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:23:50,303 INFO L124 PetriNetUnfolderBase]: 11248/15958 cut-off events. [2024-06-03 19:23:50,303 INFO L125 PetriNetUnfolderBase]: For 838788/838803 co-relation queries the response was YES. [2024-06-03 19:23:50,378 INFO L83 FinitePrefix]: Finished finitePrefix Result has 123323 conditions, 15958 events. 11248/15958 cut-off events. For 838788/838803 co-relation queries the response was YES. Maximal size of possible extension queue 492. Compared 91431 event pairs, 4950 based on Foata normal form. 22/15967 useless extension candidates. Maximal degree in co-relation 123244. Up to 14843 conditions per place. [2024-06-03 19:23:50,459 INFO L140 encePairwiseOnDemand]: 42/53 looper letters, 224 selfloop transitions, 146 changer transitions 0/377 dead transitions. [2024-06-03 19:23:50,459 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 190 places, 377 transitions, 5876 flow [2024-06-03 19:23:50,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 19:23:50,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 19:23:50,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 184 transitions. [2024-06-03 19:23:50,460 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49595687331536387 [2024-06-03 19:23:50,460 INFO L175 Difference]: Start difference. First operand has 184 places, 334 transitions, 4589 flow. Second operand 7 states and 184 transitions. [2024-06-03 19:23:50,460 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 190 places, 377 transitions, 5876 flow [2024-06-03 19:23:52,064 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 186 places, 377 transitions, 5334 flow, removed 186 selfloop flow, removed 4 redundant places. [2024-06-03 19:23:52,069 INFO L231 Difference]: Finished difference. Result has 187 places, 339 transitions, 4460 flow [2024-06-03 19:23:52,069 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=4080, PETRI_DIFFERENCE_MINUEND_PLACES=180, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=334, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=141, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=193, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4460, PETRI_PLACES=187, PETRI_TRANSITIONS=339} [2024-06-03 19:23:52,070 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 131 predicate places. [2024-06-03 19:23:52,070 INFO L495 AbstractCegarLoop]: Abstraction has has 187 places, 339 transitions, 4460 flow [2024-06-03 19:23:52,070 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) [2024-06-03 19:23:52,070 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:23:52,070 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:23:52,070 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-03 19:23:52,070 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-03 19:23:52,070 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:23:52,072 INFO L85 PathProgramCache]: Analyzing trace with hash 1233113185, now seen corresponding path program 6 times [2024-06-03 19:23:52,072 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:23:52,072 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1642157165] [2024-06-03 19:23:52,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:23:52,072 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:23:52,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:23:53,213 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:23:53,214 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:23:53,214 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1642157165] [2024-06-03 19:23:53,214 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1642157165] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:23:53,214 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:23:53,214 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:23:53,214 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1144916792] [2024-06-03 19:23:53,214 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:23:53,214 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:23:53,214 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:23:53,214 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:23:53,215 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:23:53,278 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 53 [2024-06-03 19:23:53,278 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 187 places, 339 transitions, 4460 flow. Second operand has 9 states, 9 states have (on average 14.666666666666666) internal successors, (132), 9 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:23:53,278 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:23:53,278 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 53 [2024-06-03 19:23:53,278 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:23:56,361 INFO L124 PetriNetUnfolderBase]: 11300/16029 cut-off events. [2024-06-03 19:23:56,361 INFO L125 PetriNetUnfolderBase]: For 866955/866970 co-relation queries the response was YES. [2024-06-03 19:23:56,444 INFO L83 FinitePrefix]: Finished finitePrefix Result has 124250 conditions, 16029 events. 11300/16029 cut-off events. For 866955/866970 co-relation queries the response was YES. Maximal size of possible extension queue 492. Compared 91885 event pairs, 4947 based on Foata normal form. 18/16034 useless extension candidates. Maximal degree in co-relation 124170. Up to 14891 conditions per place. [2024-06-03 19:23:56,528 INFO L140 encePairwiseOnDemand]: 41/53 looper letters, 213 selfloop transitions, 159 changer transitions 0/379 dead transitions. [2024-06-03 19:23:56,529 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 194 places, 379 transitions, 5711 flow [2024-06-03 19:23:56,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:23:56,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:23:56,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 194 transitions. [2024-06-03 19:23:56,530 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45754716981132076 [2024-06-03 19:23:56,530 INFO L175 Difference]: Start difference. First operand has 187 places, 339 transitions, 4460 flow. Second operand 8 states and 194 transitions. [2024-06-03 19:23:56,530 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 194 places, 379 transitions, 5711 flow [2024-06-03 19:23:57,683 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 191 places, 379 transitions, 5426 flow, removed 30 selfloop flow, removed 3 redundant places. [2024-06-03 19:23:57,687 INFO L231 Difference]: Finished difference. Result has 192 places, 347 transitions, 4734 flow [2024-06-03 19:23:57,688 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=4195, PETRI_DIFFERENCE_MINUEND_PLACES=184, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=339, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=151, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=188, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4734, PETRI_PLACES=192, PETRI_TRANSITIONS=347} [2024-06-03 19:23:57,688 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 136 predicate places. [2024-06-03 19:23:57,688 INFO L495 AbstractCegarLoop]: Abstraction has has 192 places, 347 transitions, 4734 flow [2024-06-03 19:23:57,688 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.666666666666666) internal successors, (132), 9 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:23:57,688 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:23:57,688 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:23:57,688 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-03 19:23:57,689 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-03 19:23:57,689 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:23:57,689 INFO L85 PathProgramCache]: Analyzing trace with hash 1414389489, now seen corresponding path program 7 times [2024-06-03 19:23:57,689 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:23:57,689 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1903606104] [2024-06-03 19:23:57,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:23:57,689 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:23:57,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:23:58,745 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:23:58,746 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:23:58,746 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1903606104] [2024-06-03 19:23:58,746 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1903606104] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:23:58,746 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:23:58,746 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 19:23:58,746 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1612794688] [2024-06-03 19:23:58,746 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:23:58,746 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 19:23:58,746 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:23:58,746 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 19:23:58,746 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-03 19:23:58,820 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 53 [2024-06-03 19:23:58,820 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 192 places, 347 transitions, 4734 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) [2024-06-03 19:23:58,820 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:23:58,820 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 53 [2024-06-03 19:23:58,820 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:24:01,766 INFO L124 PetriNetUnfolderBase]: 11270/15997 cut-off events. [2024-06-03 19:24:01,766 INFO L125 PetriNetUnfolderBase]: For 900170/900214 co-relation queries the response was YES. [2024-06-03 19:24:01,867 INFO L83 FinitePrefix]: Finished finitePrefix Result has 124422 conditions, 15997 events. 11270/15997 cut-off events. For 900170/900214 co-relation queries the response was YES. Maximal size of possible extension queue 492. Compared 91762 event pairs, 4966 based on Foata normal form. 34/16020 useless extension candidates. Maximal degree in co-relation 124340. Up to 14865 conditions per place. [2024-06-03 19:24:01,970 INFO L140 encePairwiseOnDemand]: 42/53 looper letters, 213 selfloop transitions, 154 changer transitions 0/374 dead transitions. [2024-06-03 19:24:01,971 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 198 places, 374 transitions, 5729 flow [2024-06-03 19:24:01,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 19:24:01,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 19:24:01,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 175 transitions. [2024-06-03 19:24:01,972 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4716981132075472 [2024-06-03 19:24:01,972 INFO L175 Difference]: Start difference. First operand has 192 places, 347 transitions, 4734 flow. Second operand 7 states and 175 transitions. [2024-06-03 19:24:01,972 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 198 places, 374 transitions, 5729 flow [2024-06-03 19:24:03,438 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 193 places, 374 transitions, 5246 flow, removed 128 selfloop flow, removed 5 redundant places. [2024-06-03 19:24:03,443 INFO L231 Difference]: Finished difference. Result has 194 places, 347 transitions, 4577 flow [2024-06-03 19:24:03,443 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=4251, PETRI_DIFFERENCE_MINUEND_PLACES=187, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=347, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=154, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=193, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4577, PETRI_PLACES=194, PETRI_TRANSITIONS=347} [2024-06-03 19:24:03,444 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 138 predicate places. [2024-06-03 19:24:03,444 INFO L495 AbstractCegarLoop]: Abstraction has has 194 places, 347 transitions, 4577 flow [2024-06-03 19:24:03,444 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) [2024-06-03 19:24:03,444 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:24:03,444 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:24:03,444 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-03 19:24:03,444 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-03 19:24:03,445 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:24:03,445 INFO L85 PathProgramCache]: Analyzing trace with hash -1865744287, now seen corresponding path program 8 times [2024-06-03 19:24:03,445 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:24:03,445 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2014157958] [2024-06-03 19:24:03,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:24:03,445 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:24:03,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:24:04,587 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:24:04,587 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:24:04,588 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2014157958] [2024-06-03 19:24:04,588 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2014157958] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:24:04,588 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:24:04,588 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:24:04,588 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [467291300] [2024-06-03 19:24:04,588 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:24:04,588 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:24:04,588 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:24:04,588 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:24:04,588 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:24:04,659 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 53 [2024-06-03 19:24:04,660 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 194 places, 347 transitions, 4577 flow. Second operand has 9 states, 9 states have (on average 14.666666666666666) internal successors, (132), 9 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:24:04,660 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:24:04,660 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 53 [2024-06-03 19:24:04,660 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:24:07,663 INFO L124 PetriNetUnfolderBase]: 11248/15974 cut-off events. [2024-06-03 19:24:07,664 INFO L125 PetriNetUnfolderBase]: For 924304/924348 co-relation queries the response was YES. [2024-06-03 19:24:07,751 INFO L83 FinitePrefix]: Finished finitePrefix Result has 124360 conditions, 15974 events. 11248/15974 cut-off events. For 924304/924348 co-relation queries the response was YES. Maximal size of possible extension queue 492. Compared 91865 event pairs, 4949 based on Foata normal form. 32/15995 useless extension candidates. Maximal degree in co-relation 124278. Up to 14846 conditions per place. [2024-06-03 19:24:07,836 INFO L140 encePairwiseOnDemand]: 41/53 looper letters, 207 selfloop transitions, 159 changer transitions 0/373 dead transitions. [2024-06-03 19:24:07,836 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 201 places, 373 transitions, 5422 flow [2024-06-03 19:24:07,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:24:07,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:24:07,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 188 transitions. [2024-06-03 19:24:07,837 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44339622641509435 [2024-06-03 19:24:07,837 INFO L175 Difference]: Start difference. First operand has 194 places, 347 transitions, 4577 flow. Second operand 8 states and 188 transitions. [2024-06-03 19:24:07,837 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 201 places, 373 transitions, 5422 flow [2024-06-03 19:24:09,169 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 197 places, 373 transitions, 5002 flow, removed 77 selfloop flow, removed 4 redundant places. [2024-06-03 19:24:09,179 INFO L231 Difference]: Finished difference. Result has 198 places, 347 transitions, 4488 flow [2024-06-03 19:24:09,180 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=4157, PETRI_DIFFERENCE_MINUEND_PLACES=190, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=347, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=159, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=188, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4488, PETRI_PLACES=198, PETRI_TRANSITIONS=347} [2024-06-03 19:24:09,180 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 142 predicate places. [2024-06-03 19:24:09,180 INFO L495 AbstractCegarLoop]: Abstraction has has 198 places, 347 transitions, 4488 flow [2024-06-03 19:24:09,180 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.666666666666666) internal successors, (132), 9 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:24:09,180 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:24:09,180 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:24:09,180 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-03 19:24:09,180 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-03 19:24:09,180 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:24:09,180 INFO L85 PathProgramCache]: Analyzing trace with hash -1450743883, now seen corresponding path program 1 times [2024-06-03 19:24:09,181 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:24:09,181 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1280215856] [2024-06-03 19:24:09,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:24:09,181 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:24:09,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:24:10,647 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:24:10,647 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:24:10,647 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1280215856] [2024-06-03 19:24:10,647 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1280215856] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:24:10,647 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:24:10,647 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 19:24:10,647 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1109845471] [2024-06-03 19:24:10,648 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:24:10,648 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 19:24:10,648 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:24:10,648 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 19:24:10,648 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-03 19:24:10,749 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 53 [2024-06-03 19:24:10,750 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 198 places, 347 transitions, 4488 flow. Second operand has 7 states, 7 states have (on average 18.428571428571427) internal successors, (129), 7 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:24:10,750 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:24:10,750 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 53 [2024-06-03 19:24:10,750 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:24:13,214 INFO L124 PetriNetUnfolderBase]: 8975/13423 cut-off events. [2024-06-03 19:24:13,214 INFO L125 PetriNetUnfolderBase]: For 806314/806559 co-relation queries the response was YES. [2024-06-03 19:24:13,288 INFO L83 FinitePrefix]: Finished finitePrefix Result has 104736 conditions, 13423 events. 8975/13423 cut-off events. For 806314/806559 co-relation queries the response was YES. Maximal size of possible extension queue 477. Compared 84425 event pairs, 4443 based on Foata normal form. 48/13280 useless extension candidates. Maximal degree in co-relation 104653. Up to 12063 conditions per place. [2024-06-03 19:24:13,357 INFO L140 encePairwiseOnDemand]: 44/53 looper letters, 263 selfloop transitions, 15 changer transitions 0/362 dead transitions. [2024-06-03 19:24:13,357 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 203 places, 362 transitions, 5158 flow [2024-06-03 19:24:13,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 19:24:13,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 19:24:13,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 152 transitions. [2024-06-03 19:24:13,357 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4779874213836478 [2024-06-03 19:24:13,358 INFO L175 Difference]: Start difference. First operand has 198 places, 347 transitions, 4488 flow. Second operand 6 states and 152 transitions. [2024-06-03 19:24:13,358 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 203 places, 362 transitions, 5158 flow [2024-06-03 19:24:14,407 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 197 places, 362 transitions, 4837 flow, removed 1 selfloop flow, removed 6 redundant places. [2024-06-03 19:24:14,412 INFO L231 Difference]: Finished difference. Result has 198 places, 351 transitions, 4290 flow [2024-06-03 19:24:14,412 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=4167, PETRI_DIFFERENCE_MINUEND_PLACES=192, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=347, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=332, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4290, PETRI_PLACES=198, PETRI_TRANSITIONS=351} [2024-06-03 19:24:14,413 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 142 predicate places. [2024-06-03 19:24:14,413 INFO L495 AbstractCegarLoop]: Abstraction has has 198 places, 351 transitions, 4290 flow [2024-06-03 19:24:14,413 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.428571428571427) internal successors, (129), 7 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:24:14,413 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:24:14,413 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:24:14,413 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-03 19:24:14,413 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-03 19:24:14,414 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:24:14,414 INFO L85 PathProgramCache]: Analyzing trace with hash -5892387, now seen corresponding path program 1 times [2024-06-03 19:24:14,414 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:24:14,414 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1240488876] [2024-06-03 19:24:14,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:24:14,414 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:24:14,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:24:15,454 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:24:15,454 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:24:15,454 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1240488876] [2024-06-03 19:24:15,454 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1240488876] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:24:15,455 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:24:15,455 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:24:15,455 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1180071697] [2024-06-03 19:24:15,455 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:24:15,455 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:24:15,455 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:24:15,455 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:24:15,455 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:24:15,558 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 53 [2024-06-03 19:24:15,558 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 198 places, 351 transitions, 4290 flow. Second operand has 9 states, 9 states have (on average 14.777777777777779) internal successors, (133), 9 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:24:15,558 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:24:15,558 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 53 [2024-06-03 19:24:15,558 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:24:18,496 INFO L124 PetriNetUnfolderBase]: 11626/16500 cut-off events. [2024-06-03 19:24:18,497 INFO L125 PetriNetUnfolderBase]: For 1023146/1023154 co-relation queries the response was YES. [2024-06-03 19:24:18,592 INFO L83 FinitePrefix]: Finished finitePrefix Result has 131148 conditions, 16500 events. 11626/16500 cut-off events. For 1023146/1023154 co-relation queries the response was YES. Maximal size of possible extension queue 498. Compared 94769 event pairs, 4955 based on Foata normal form. 24/16520 useless extension candidates. Maximal degree in co-relation 131064. Up to 15326 conditions per place. [2024-06-03 19:24:18,680 INFO L140 encePairwiseOnDemand]: 39/53 looper letters, 338 selfloop transitions, 87 changer transitions 0/432 dead transitions. [2024-06-03 19:24:18,680 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 206 places, 432 transitions, 5802 flow [2024-06-03 19:24:18,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:24:18,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:24:18,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 243 transitions. [2024-06-03 19:24:18,681 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5094339622641509 [2024-06-03 19:24:18,681 INFO L175 Difference]: Start difference. First operand has 198 places, 351 transitions, 4290 flow. Second operand 9 states and 243 transitions. [2024-06-03 19:24:18,681 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 206 places, 432 transitions, 5802 flow [2024-06-03 19:24:19,950 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 202 places, 432 transitions, 5707 flow, removed 35 selfloop flow, removed 4 redundant places. [2024-06-03 19:24:19,955 INFO L231 Difference]: Finished difference. Result has 205 places, 371 transitions, 4684 flow [2024-06-03 19:24:19,955 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=4195, PETRI_DIFFERENCE_MINUEND_PLACES=194, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=351, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=277, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4684, PETRI_PLACES=205, PETRI_TRANSITIONS=371} [2024-06-03 19:24:19,955 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 149 predicate places. [2024-06-03 19:24:19,956 INFO L495 AbstractCegarLoop]: Abstraction has has 205 places, 371 transitions, 4684 flow [2024-06-03 19:24:19,956 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.777777777777779) internal successors, (133), 9 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:24:19,956 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:24:19,956 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:24:19,956 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-03 19:24:19,956 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-03 19:24:19,956 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:24:19,957 INFO L85 PathProgramCache]: Analyzing trace with hash -647458057, now seen corresponding path program 2 times [2024-06-03 19:24:19,957 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:24:19,957 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [508939944] [2024-06-03 19:24:19,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:24:19,957 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:24:19,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat