./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/mix020.oepc.i --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --validate ./goblint.2024-05-21_14-57-05.files/protection/mix020.oepc.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version cde23df1 Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReachWitnessValidation.xml -i ../../../trunk/examples/svcomp/pthread-wmm/mix020.oepc.i ./goblint.2024-05-21_14-57-05.files/protection/mix020.oepc.yml/witness.yml -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --traceabstraction.compute.hoare.annotation.of.negated.interpolant.automaton,.abstraction.and.cfg false --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.fs.goblint-validation-cde23df-m [2024-06-14 12:07:05,047 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-14 12:07:05,128 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-14 12:07:05,133 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-14 12:07:05,134 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-14 12:07:05,167 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-14 12:07:05,168 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-14 12:07:05,168 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-14 12:07:05,169 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-14 12:07:05,174 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-14 12:07:05,175 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-14 12:07:05,175 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-14 12:07:05,176 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-14 12:07:05,178 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-14 12:07:05,178 INFO L153 SettingsManager]: * Use SBE=true [2024-06-14 12:07:05,178 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-14 12:07:05,179 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-14 12:07:05,179 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-14 12:07:05,179 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-14 12:07:05,179 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-14 12:07:05,179 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-14 12:07:05,180 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-14 12:07:05,180 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-14 12:07:05,180 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-14 12:07:05,181 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-14 12:07:05,181 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-14 12:07:05,181 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-14 12:07:05,181 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-14 12:07:05,182 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-14 12:07:05,182 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-14 12:07:05,183 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-14 12:07:05,183 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-14 12:07:05,184 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-14 12:07:05,184 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-14 12:07:05,184 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-14 12:07:05,184 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-14 12:07:05,184 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-14 12:07:05,185 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-14 12:07:05,185 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-14 12:07:05,185 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-14 12:07:05,185 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-14 12:07:05,186 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-14 12:07:05,186 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-14 12:07:05,186 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-14 12:07:05,441 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-14 12:07:05,466 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-14 12:07:05,468 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-14 12:07:05,469 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-14 12:07:05,470 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-14 12:07:05,471 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-05-21_14-57-05.files/protection/mix020.oepc.yml/witness.yml [2024-06-14 12:07:05,749 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-14 12:07:05,749 INFO L274 PluginConnector]: CDTParser initialized [2024-06-14 12:07:05,750 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/mix020.oepc.i [2024-06-14 12:07:06,881 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-14 12:07:07,163 INFO L384 CDTParser]: Found 1 translation units. [2024-06-14 12:07:07,164 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/mix020.oepc.i [2024-06-14 12:07:07,186 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ae6949368/30189b9cb61345edbf56409991e1abd6/FLAG43dbebf72 [2024-06-14 12:07:07,206 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ae6949368/30189b9cb61345edbf56409991e1abd6 [2024-06-14 12:07:07,207 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-14 12:07:07,210 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-14 12:07:07,212 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-14 12:07:07,212 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-14 12:07:07,216 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-14 12:07:07,217 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 14.06 12:07:05" (1/2) ... [2024-06-14 12:07:07,218 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@28f275d8 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 12:07:07, skipping insertion in model container [2024-06-14 12:07:07,218 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 14.06 12:07:05" (1/2) ... [2024-06-14 12:07:07,220 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@7a1902e1 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 12:07:07, skipping insertion in model container [2024-06-14 12:07:07,220 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.06 12:07:07" (2/2) ... [2024-06-14 12:07:07,220 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@28f275d8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 12:07:07, skipping insertion in model container [2024-06-14 12:07:07,221 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.06 12:07:07" (2/2) ... [2024-06-14 12:07:07,221 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-14 12:07:07,365 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-14 12:07:07,366 INFO L97 edCorrectnessWitness]: Location invariant before [L871-L871] ((((((((((((((((((((((! multithreaded || ((0 <= a$w_buff1 && a$w_buff1 <= 1) && (a$w_buff1 == 0 || a$w_buff1 == 1))) && (! multithreaded || ((0 <= a$mem_tmp && a$mem_tmp <= 1) && (a$mem_tmp == 0 || a$mem_tmp == 1)))) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1)))) && (! multithreaded || ((0 <= a && a <= 1) && (a == 0 || a == 1)))) && (! multithreaded || ((0 <= a$w_buff0 && a$w_buff0 <= 1) && (a$w_buff0 == 0 || a$w_buff0 == 1)))) && (! multithreaded || (((0 <= y && y <= 2) && y <= 127) && ((y == 0 || y == 1) || y == 2)))) && (! multithreaded || ((0 <= __unbuffered_p3_EBX && __unbuffered_p3_EBX <= 1) && (__unbuffered_p3_EBX == 0 || __unbuffered_p3_EBX == 1)))) && (! multithreaded || a$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || a$read_delayed == (_Bool)0)) && (! multithreaded || a$read_delayed_var == 0)) && (! multithreaded || a$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || ((0 <= z && z <= 1) && (z == 0 || z == 1)))) && (! multithreaded || a$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || a$r_buff1_thd4 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || a$r_buff0_thd4 == (_Bool)0)) && (! multithreaded || a$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 1) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || a$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || a$flush_delayed == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p3_EAX && __unbuffered_p3_EAX <= 1) && (__unbuffered_p3_EAX == 0 || __unbuffered_p3_EAX == 1)))) && (! multithreaded || a$r_buff0_thd3 == (_Bool)0) [2024-06-14 12:07:07,367 INFO L97 edCorrectnessWitness]: Location invariant before [L873-L873] ((((((((((((((((((((((! multithreaded || ((0 <= a$w_buff1 && a$w_buff1 <= 1) && (a$w_buff1 == 0 || a$w_buff1 == 1))) && (! multithreaded || ((0 <= a$mem_tmp && a$mem_tmp <= 1) && (a$mem_tmp == 0 || a$mem_tmp == 1)))) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1)))) && (! multithreaded || ((0 <= a && a <= 1) && (a == 0 || a == 1)))) && (! multithreaded || ((0 <= a$w_buff0 && a$w_buff0 <= 1) && (a$w_buff0 == 0 || a$w_buff0 == 1)))) && (! multithreaded || (((0 <= y && y <= 2) && y <= 127) && ((y == 0 || y == 1) || y == 2)))) && (! multithreaded || ((0 <= __unbuffered_p3_EBX && __unbuffered_p3_EBX <= 1) && (__unbuffered_p3_EBX == 0 || __unbuffered_p3_EBX == 1)))) && (! multithreaded || a$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || a$read_delayed == (_Bool)0)) && (! multithreaded || a$read_delayed_var == 0)) && (! multithreaded || a$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || ((0 <= z && z <= 1) && (z == 0 || z == 1)))) && (! multithreaded || a$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || a$r_buff1_thd4 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || a$r_buff0_thd4 == (_Bool)0)) && (! multithreaded || a$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 1) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || a$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || a$flush_delayed == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p3_EAX && __unbuffered_p3_EAX <= 1) && (__unbuffered_p3_EAX == 0 || __unbuffered_p3_EAX == 1)))) && (! multithreaded || a$r_buff0_thd3 == (_Bool)0) [2024-06-14 12:07:07,367 INFO L97 edCorrectnessWitness]: Location invariant before [L874-L874] ((((((((((((((((((((((! multithreaded || ((0 <= a$w_buff1 && a$w_buff1 <= 1) && (a$w_buff1 == 0 || a$w_buff1 == 1))) && (! multithreaded || ((0 <= a$mem_tmp && a$mem_tmp <= 1) && (a$mem_tmp == 0 || a$mem_tmp == 1)))) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1)))) && (! multithreaded || ((0 <= a && a <= 1) && (a == 0 || a == 1)))) && (! multithreaded || ((0 <= a$w_buff0 && a$w_buff0 <= 1) && (a$w_buff0 == 0 || a$w_buff0 == 1)))) && (! multithreaded || (((0 <= y && y <= 2) && y <= 127) && ((y == 0 || y == 1) || y == 2)))) && (! multithreaded || ((0 <= __unbuffered_p3_EBX && __unbuffered_p3_EBX <= 1) && (__unbuffered_p3_EBX == 0 || __unbuffered_p3_EBX == 1)))) && (! multithreaded || a$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || a$read_delayed == (_Bool)0)) && (! multithreaded || a$read_delayed_var == 0)) && (! multithreaded || a$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || ((0 <= z && z <= 1) && (z == 0 || z == 1)))) && (! multithreaded || a$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || a$r_buff1_thd4 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || a$r_buff0_thd4 == (_Bool)0)) && (! multithreaded || a$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 1) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || a$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || a$flush_delayed == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p3_EAX && __unbuffered_p3_EAX <= 1) && (__unbuffered_p3_EAX == 0 || __unbuffered_p3_EAX == 1)))) && (! multithreaded || a$r_buff0_thd3 == (_Bool)0) [2024-06-14 12:07:07,367 INFO L97 edCorrectnessWitness]: Location invariant before [L869-L869] ((((((((((((((((((((((! multithreaded || ((0 <= a$w_buff1 && a$w_buff1 <= 1) && (a$w_buff1 == 0 || a$w_buff1 == 1))) && (! multithreaded || ((0 <= a$mem_tmp && a$mem_tmp <= 1) && (a$mem_tmp == 0 || a$mem_tmp == 1)))) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1)))) && (! multithreaded || ((0 <= a && a <= 1) && (a == 0 || a == 1)))) && (! multithreaded || ((0 <= a$w_buff0 && a$w_buff0 <= 1) && (a$w_buff0 == 0 || a$w_buff0 == 1)))) && (! multithreaded || (((0 <= y && y <= 2) && y <= 127) && ((y == 0 || y == 1) || y == 2)))) && (! multithreaded || ((0 <= __unbuffered_p3_EBX && __unbuffered_p3_EBX <= 1) && (__unbuffered_p3_EBX == 0 || __unbuffered_p3_EBX == 1)))) && (! multithreaded || a$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || a$read_delayed == (_Bool)0)) && (! multithreaded || a$read_delayed_var == 0)) && (! multithreaded || a$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || ((0 <= z && z <= 1) && (z == 0 || z == 1)))) && (! multithreaded || a$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || a$r_buff1_thd4 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || a$r_buff0_thd4 == (_Bool)0)) && (! multithreaded || a$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 1) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || a$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || a$flush_delayed == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p3_EAX && __unbuffered_p3_EAX <= 1) && (__unbuffered_p3_EAX == 0 || __unbuffered_p3_EAX == 1)))) && (! multithreaded || a$r_buff0_thd3 == (_Bool)0) [2024-06-14 12:07:07,368 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-14 12:07:07,368 INFO L106 edCorrectnessWitness]: ghost_update [L867-L867] multithreaded = 1; [2024-06-14 12:07:07,413 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-14 12:07:07,868 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-14 12:07:07,884 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-14 12:07:08,052 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-14 12:07:08,103 INFO L206 MainTranslator]: Completed translation [2024-06-14 12:07:08,104 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 12:07:08 WrapperNode [2024-06-14 12:07:08,104 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-14 12:07:08,106 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-14 12:07:08,106 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-14 12:07:08,106 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-14 12:07:08,111 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 12:07:08" (1/1) ... [2024-06-14 12:07:08,126 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 12:07:08" (1/1) ... [2024-06-14 12:07:08,182 INFO L138 Inliner]: procedures = 176, calls = 54, calls flagged for inlining = 6, calls inlined = 7, statements flattened = 139 [2024-06-14 12:07:08,182 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-14 12:07:08,183 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-14 12:07:08,183 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-14 12:07:08,183 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-14 12:07:08,195 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 12:07:08" (1/1) ... [2024-06-14 12:07:08,195 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 12:07:08" (1/1) ... [2024-06-14 12:07:08,199 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 12:07:08" (1/1) ... [2024-06-14 12:07:08,215 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2024-06-14 12:07:08,215 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 12:07:08" (1/1) ... [2024-06-14 12:07:08,215 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 12:07:08" (1/1) ... [2024-06-14 12:07:08,226 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 12:07:08" (1/1) ... [2024-06-14 12:07:08,228 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 12:07:08" (1/1) ... [2024-06-14 12:07:08,230 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 12:07:08" (1/1) ... [2024-06-14 12:07:08,232 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 12:07:08" (1/1) ... [2024-06-14 12:07:08,240 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-14 12:07:08,241 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-14 12:07:08,241 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-14 12:07:08,241 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-14 12:07:08,242 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 12:07:08" (1/1) ... [2024-06-14 12:07:08,255 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-14 12:07:08,263 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-14 12:07:08,298 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-06-14 12:07:08,308 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-06-14 12:07:08,339 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-14 12:07:08,339 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-14 12:07:08,340 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-14 12:07:08,340 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-14 12:07:08,340 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-14 12:07:08,341 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-14 12:07:08,341 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-14 12:07:08,341 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-14 12:07:08,341 INFO L130 BoogieDeclarations]: Found specification of procedure P3 [2024-06-14 12:07:08,341 INFO L138 BoogieDeclarations]: Found implementation of procedure P3 [2024-06-14 12:07:08,341 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-14 12:07:08,342 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-14 12:07:08,342 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-14 12:07:08,343 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-14 12:07:08,344 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-14 12:07:08,491 INFO L244 CfgBuilder]: Building ICFG [2024-06-14 12:07:08,493 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-14 12:07:09,031 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-14 12:07:09,032 INFO L293 CfgBuilder]: Performing block encoding [2024-06-14 12:07:09,226 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-14 12:07:09,226 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-14 12:07:09,227 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.06 12:07:09 BoogieIcfgContainer [2024-06-14 12:07:09,227 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-14 12:07:09,230 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-14 12:07:09,230 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-14 12:07:09,233 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-14 12:07:09,234 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 14.06 12:07:05" (1/4) ... [2024-06-14 12:07:09,234 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@48af019d and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 14.06 12:07:09, skipping insertion in model container [2024-06-14 12:07:09,234 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.06 12:07:07" (2/4) ... [2024-06-14 12:07:09,235 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@48af019d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.06 12:07:09, skipping insertion in model container [2024-06-14 12:07:09,235 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 12:07:08" (3/4) ... [2024-06-14 12:07:09,235 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@48af019d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.06 12:07:09, skipping insertion in model container [2024-06-14 12:07:09,235 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.06 12:07:09" (4/4) ... [2024-06-14 12:07:09,237 INFO L112 eAbstractionObserver]: Analyzing ICFG mix020.oepc.i [2024-06-14 12:07:09,254 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-14 12:07:09,255 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 4 error locations. [2024-06-14 12:07:09,255 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-14 12:07:09,315 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-14 12:07:09,366 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 66 places, 53 transitions, 122 flow [2024-06-14 12:07:09,396 INFO L124 PetriNetUnfolderBase]: 0/49 cut-off events. [2024-06-14 12:07:09,396 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-14 12:07:09,399 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62 conditions, 49 events. 0/49 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 83 event pairs, 0 based on Foata normal form. 0/45 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2024-06-14 12:07:09,399 INFO L82 GeneralOperation]: Start removeDead. Operand has 66 places, 53 transitions, 122 flow [2024-06-14 12:07:09,403 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 56 places, 43 transitions, 98 flow [2024-06-14 12:07:09,418 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-14 12:07:09,425 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;@2b16ada, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-14 12:07:09,426 INFO L358 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2024-06-14 12:07:09,431 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-14 12:07:09,432 INFO L124 PetriNetUnfolderBase]: 0/6 cut-off events. [2024-06-14 12:07:09,432 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-14 12:07:09,432 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:07:09,433 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-06-14 12:07:09,433 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 12:07:09,438 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:07:09,438 INFO L85 PathProgramCache]: Analyzing trace with hash -450440332, now seen corresponding path program 1 times [2024-06-14 12:07:09,447 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:07:09,447 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [567392763] [2024-06-14 12:07:09,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:07:09,448 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:07:09,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:07:10,898 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:07:10,899 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:07:10,899 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [567392763] [2024-06-14 12:07:10,900 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [567392763] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:07:10,900 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:07:10,900 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-14 12:07:10,902 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [309422780] [2024-06-14 12:07:10,902 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:07:10,910 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-14 12:07:10,915 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:07:10,941 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-14 12:07:10,941 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-14 12:07:11,016 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 53 [2024-06-14 12:07:11,020 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 43 transitions, 98 flow. Second operand has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:07:11,020 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:07:11,020 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 53 [2024-06-14 12:07:11,021 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:07:13,119 INFO L124 PetriNetUnfolderBase]: 9583/13402 cut-off events. [2024-06-14 12:07:13,120 INFO L125 PetriNetUnfolderBase]: For 182/182 co-relation queries the response was YES. [2024-06-14 12:07:13,154 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26802 conditions, 13402 events. 9583/13402 cut-off events. For 182/182 co-relation queries the response was YES. Maximal size of possible extension queue 480. Compared 73458 event pairs, 7347 based on Foata normal form. 1/13218 useless extension candidates. Maximal degree in co-relation 26786. Up to 13009 conditions per place. [2024-06-14 12:07:13,236 INFO L140 encePairwiseOnDemand]: 44/53 looper letters, 45 selfloop transitions, 5 changer transitions 0/57 dead transitions. [2024-06-14 12:07:13,236 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 57 transitions, 235 flow [2024-06-14 12:07:13,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-14 12:07:13,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-14 12:07:13,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 96 transitions. [2024-06-14 12:07:13,250 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6037735849056604 [2024-06-14 12:07:13,251 INFO L175 Difference]: Start difference. First operand has 56 places, 43 transitions, 98 flow. Second operand 3 states and 96 transitions. [2024-06-14 12:07:13,252 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 57 transitions, 235 flow [2024-06-14 12:07:13,255 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 57 transitions, 228 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-06-14 12:07:13,259 INFO L231 Difference]: Finished difference. Result has 55 places, 47 transitions, 133 flow [2024-06-14 12:07:13,261 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} [2024-06-14 12:07:13,265 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, -1 predicate places. [2024-06-14 12:07:13,265 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 47 transitions, 133 flow [2024-06-14 12:07:13,266 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:07:13,266 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:07:13,266 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:07:13,266 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-14 12:07:13,266 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 12:07:13,267 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:07:13,267 INFO L85 PathProgramCache]: Analyzing trace with hash 918560787, now seen corresponding path program 1 times [2024-06-14 12:07:13,267 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:07:13,267 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1742704119] [2024-06-14 12:07:13,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:07:13,268 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:07:13,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:07:14,298 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:07:14,299 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:07:14,299 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1742704119] [2024-06-14 12:07:14,299 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1742704119] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:07:14,300 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:07:14,300 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-14 12:07:14,300 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [65827188] [2024-06-14 12:07:14,300 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:07:14,302 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-14 12:07:14,302 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:07:14,303 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-14 12:07:14,303 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-06-14 12:07:14,387 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 53 [2024-06-14 12:07:14,388 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 47 transitions, 133 flow. Second operand has 4 states, 4 states have (on average 15.75) internal successors, (63), 4 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:07:14,388 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:07:14,389 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 53 [2024-06-14 12:07:14,389 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:07:16,374 INFO L124 PetriNetUnfolderBase]: 9573/13388 cut-off events. [2024-06-14 12:07:16,375 INFO L125 PetriNetUnfolderBase]: For 2477/2477 co-relation queries the response was YES. [2024-06-14 12:07:16,404 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30228 conditions, 13388 events. 9573/13388 cut-off events. For 2477/2477 co-relation queries the response was YES. Maximal size of possible extension queue 480. Compared 73509 event pairs, 6546 based on Foata normal form. 4/13389 useless extension candidates. Maximal degree in co-relation 30213. Up to 12974 conditions per place. [2024-06-14 12:07:16,469 INFO L140 encePairwiseOnDemand]: 43/53 looper letters, 55 selfloop transitions, 9 changer transitions 0/71 dead transitions. [2024-06-14 12:07:16,469 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 71 transitions, 327 flow [2024-06-14 12:07:16,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-14 12:07:16,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-14 12:07:16,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 124 transitions. [2024-06-14 12:07:16,474 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5849056603773585 [2024-06-14 12:07:16,474 INFO L175 Difference]: Start difference. First operand has 55 places, 47 transitions, 133 flow. Second operand 4 states and 124 transitions. [2024-06-14 12:07:16,474 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 71 transitions, 327 flow [2024-06-14 12:07:16,482 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 71 transitions, 322 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-14 12:07:16,484 INFO L231 Difference]: Finished difference. Result has 58 places, 51 transitions, 181 flow [2024-06-14 12:07:16,485 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} [2024-06-14 12:07:16,486 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 2 predicate places. [2024-06-14 12:07:16,486 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 51 transitions, 181 flow [2024-06-14 12:07:16,488 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.75) internal successors, (63), 4 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:07:16,488 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:07:16,489 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:07:16,489 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-14 12:07:16,490 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 12:07:16,496 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:07:16,496 INFO L85 PathProgramCache]: Analyzing trace with hash -2026321742, now seen corresponding path program 1 times [2024-06-14 12:07:16,496 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:07:16,497 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [510563474] [2024-06-14 12:07:16,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:07:16,497 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:07:16,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:07:17,954 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:07:17,955 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:07:17,955 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [510563474] [2024-06-14 12:07:17,955 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [510563474] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:07:17,955 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:07:17,955 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 12:07:17,956 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2061812040] [2024-06-14 12:07:17,956 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:07:17,956 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 12:07:17,957 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:07:17,957 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 12:07:17,957 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-06-14 12:07:18,042 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 53 [2024-06-14 12:07:18,043 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 51 transitions, 181 flow. Second operand has 6 states, 6 states have (on average 14.5) internal successors, (87), 6 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:07:18,043 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:07:18,043 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 53 [2024-06-14 12:07:18,043 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:07:20,330 INFO L124 PetriNetUnfolderBase]: 11609/16162 cut-off events. [2024-06-14 12:07:20,331 INFO L125 PetriNetUnfolderBase]: For 8177/8177 co-relation queries the response was YES. [2024-06-14 12:07:20,403 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40315 conditions, 16162 events. 11609/16162 cut-off events. For 8177/8177 co-relation queries the response was YES. Maximal size of possible extension queue 562. Compared 88882 event pairs, 6715 based on Foata normal form. 4/16163 useless extension candidates. Maximal degree in co-relation 40298. Up to 15648 conditions per place. [2024-06-14 12:07:20,491 INFO L140 encePairwiseOnDemand]: 41/53 looper letters, 76 selfloop transitions, 17 changer transitions 0/99 dead transitions. [2024-06-14 12:07:20,492 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 99 transitions, 514 flow [2024-06-14 12:07:20,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 12:07:20,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 12:07:20,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 175 transitions. [2024-06-14 12:07:20,498 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.550314465408805 [2024-06-14 12:07:20,498 INFO L175 Difference]: Start difference. First operand has 58 places, 51 transitions, 181 flow. Second operand 6 states and 175 transitions. [2024-06-14 12:07:20,498 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 99 transitions, 514 flow [2024-06-14 12:07:20,503 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 99 transitions, 486 flow, removed 6 selfloop flow, removed 2 redundant places. [2024-06-14 12:07:20,505 INFO L231 Difference]: Finished difference. Result has 63 places, 59 transitions, 258 flow [2024-06-14 12:07:20,505 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=162, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=258, PETRI_PLACES=63, PETRI_TRANSITIONS=59} [2024-06-14 12:07:20,507 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 7 predicate places. [2024-06-14 12:07:20,507 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 59 transitions, 258 flow [2024-06-14 12:07:20,507 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.5) internal successors, (87), 6 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:07:20,507 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:07:20,508 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:07:20,508 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-14 12:07:20,508 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 12:07:20,509 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:07:20,509 INFO L85 PathProgramCache]: Analyzing trace with hash 1608536278, now seen corresponding path program 1 times [2024-06-14 12:07:20,509 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:07:20,509 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2140378793] [2024-06-14 12:07:20,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:07:20,510 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:07:20,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:07:22,032 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:07:22,034 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:07:22,036 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2140378793] [2024-06-14 12:07:22,036 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2140378793] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:07:22,036 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:07:22,036 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 12:07:22,036 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1506248419] [2024-06-14 12:07:22,037 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:07:22,037 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 12:07:22,037 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:07:22,038 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 12:07:22,038 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-06-14 12:07:22,172 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 53 [2024-06-14 12:07:22,172 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 59 transitions, 258 flow. Second operand has 7 states, 7 states have (on average 14.428571428571429) internal successors, (101), 7 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:07:22,173 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:07:22,173 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 53 [2024-06-14 12:07:22,173 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:07:23,891 INFO L124 PetriNetUnfolderBase]: 11593/16134 cut-off events. [2024-06-14 12:07:23,891 INFO L125 PetriNetUnfolderBase]: For 16521/16521 co-relation queries the response was YES. [2024-06-14 12:07:23,923 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44839 conditions, 16134 events. 11593/16134 cut-off events. For 16521/16521 co-relation queries the response was YES. Maximal size of possible extension queue 562. Compared 88657 event pairs, 5796 based on Foata normal form. 8/16139 useless extension candidates. Maximal degree in co-relation 44820. Up to 15582 conditions per place. [2024-06-14 12:07:23,991 INFO L140 encePairwiseOnDemand]: 41/53 looper letters, 83 selfloop transitions, 20 changer transitions 0/109 dead transitions. [2024-06-14 12:07:23,991 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 109 transitions, 604 flow [2024-06-14 12:07:23,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:07:23,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:07:23,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 198 transitions. [2024-06-14 12:07:23,993 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5336927223719676 [2024-06-14 12:07:23,993 INFO L175 Difference]: Start difference. First operand has 63 places, 59 transitions, 258 flow. Second operand 7 states and 198 transitions. [2024-06-14 12:07:23,993 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 109 transitions, 604 flow [2024-06-14 12:07:23,998 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 109 transitions, 565 flow, removed 6 selfloop flow, removed 3 redundant places. [2024-06-14 12:07:24,000 INFO L231 Difference]: Finished difference. Result has 66 places, 61 transitions, 291 flow [2024-06-14 12:07:24,000 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=211, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=291, PETRI_PLACES=66, PETRI_TRANSITIONS=61} [2024-06-14 12:07:24,002 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 10 predicate places. [2024-06-14 12:07:24,002 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 61 transitions, 291 flow [2024-06-14 12:07:24,002 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.428571428571429) internal successors, (101), 7 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:07:24,002 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:07:24,002 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:07:24,003 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-14 12:07:24,003 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 12:07:24,003 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:07:24,003 INFO L85 PathProgramCache]: Analyzing trace with hash 1375156545, now seen corresponding path program 1 times [2024-06-14 12:07:24,004 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:07:24,004 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [506950752] [2024-06-14 12:07:24,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:07:24,004 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:07:24,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:07:24,890 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:07:24,890 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:07:24,890 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [506950752] [2024-06-14 12:07:24,891 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [506950752] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:07:24,891 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:07:24,891 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 12:07:24,891 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2046618009] [2024-06-14 12:07:24,891 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:07:24,891 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 12:07:24,892 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:07:24,892 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 12:07:24,892 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-14 12:07:24,965 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 53 [2024-06-14 12:07:24,965 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 61 transitions, 291 flow. Second operand has 6 states, 6 states have (on average 13.666666666666666) internal successors, (82), 6 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:07:24,965 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:07:24,966 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 53 [2024-06-14 12:07:24,966 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:07:27,132 INFO L124 PetriNetUnfolderBase]: 11584/16154 cut-off events. [2024-06-14 12:07:27,132 INFO L125 PetriNetUnfolderBase]: For 25790/25790 co-relation queries the response was YES. [2024-06-14 12:07:27,211 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48041 conditions, 16154 events. 11584/16154 cut-off events. For 25790/25790 co-relation queries the response was YES. Maximal size of possible extension queue 560. Compared 88919 event pairs, 6342 based on Foata normal form. 3/16154 useless extension candidates. Maximal degree in co-relation 48021. Up to 15660 conditions per place. [2024-06-14 12:07:27,305 INFO L140 encePairwiseOnDemand]: 43/53 looper letters, 66 selfloop transitions, 10 changer transitions 0/82 dead transitions. [2024-06-14 12:07:27,305 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 82 transitions, 513 flow [2024-06-14 12:07:27,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 12:07:27,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 12:07:27,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 124 transitions. [2024-06-14 12:07:27,311 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4679245283018868 [2024-06-14 12:07:27,311 INFO L175 Difference]: Start difference. First operand has 66 places, 61 transitions, 291 flow. Second operand 5 states and 124 transitions. [2024-06-14 12:07:27,311 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 82 transitions, 513 flow [2024-06-14 12:07:27,319 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 82 transitions, 459 flow, removed 9 selfloop flow, removed 5 redundant places. [2024-06-14 12:07:27,322 INFO L231 Difference]: Finished difference. Result has 66 places, 65 transitions, 302 flow [2024-06-14 12:07:27,323 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=237, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=302, PETRI_PLACES=66, PETRI_TRANSITIONS=65} [2024-06-14 12:07:27,325 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 10 predicate places. [2024-06-14 12:07:27,326 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 65 transitions, 302 flow [2024-06-14 12:07:27,326 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.666666666666666) internal successors, (82), 6 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:07:27,326 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:07:27,326 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:07:27,327 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-14 12:07:27,327 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 12:07:27,327 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:07:27,327 INFO L85 PathProgramCache]: Analyzing trace with hash -319818651, now seen corresponding path program 1 times [2024-06-14 12:07:27,328 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:07:27,328 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1348235451] [2024-06-14 12:07:27,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:07:27,328 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:07:27,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:07:28,488 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:07:28,488 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:07:28,488 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1348235451] [2024-06-14 12:07:28,489 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1348235451] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:07:28,489 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:07:28,489 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 12:07:28,489 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1391123571] [2024-06-14 12:07:28,489 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:07:28,490 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 12:07:28,490 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:07:28,490 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 12:07:28,491 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-14 12:07:28,579 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 53 [2024-06-14 12:07:28,579 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 65 transitions, 302 flow. Second operand has 7 states, 7 states have (on average 13.571428571428571) internal successors, (95), 7 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:07:28,579 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:07:28,579 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 53 [2024-06-14 12:07:28,580 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:07:30,510 INFO L124 PetriNetUnfolderBase]: 11650/16443 cut-off events. [2024-06-14 12:07:30,510 INFO L125 PetriNetUnfolderBase]: For 37059/37059 co-relation queries the response was YES. [2024-06-14 12:07:30,550 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52203 conditions, 16443 events. 11650/16443 cut-off events. For 37059/37059 co-relation queries the response was YES. Maximal size of possible extension queue 575. Compared 91963 event pairs, 6009 based on Foata normal form. 14/16451 useless extension candidates. Maximal degree in co-relation 52181. Up to 15536 conditions per place. [2024-06-14 12:07:30,630 INFO L140 encePairwiseOnDemand]: 41/53 looper letters, 84 selfloop transitions, 22 changer transitions 0/112 dead transitions. [2024-06-14 12:07:30,630 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 112 transitions, 724 flow [2024-06-14 12:07:30,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 12:07:30,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 12:07:30,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 160 transitions. [2024-06-14 12:07:30,632 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5031446540880503 [2024-06-14 12:07:30,632 INFO L175 Difference]: Start difference. First operand has 66 places, 65 transitions, 302 flow. Second operand 6 states and 160 transitions. [2024-06-14 12:07:30,632 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 112 transitions, 724 flow [2024-06-14 12:07:30,641 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 112 transitions, 691 flow, removed 9 selfloop flow, removed 3 redundant places. [2024-06-14 12:07:30,643 INFO L231 Difference]: Finished difference. Result has 71 places, 79 transitions, 449 flow [2024-06-14 12:07:30,643 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=269, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=449, PETRI_PLACES=71, PETRI_TRANSITIONS=79} [2024-06-14 12:07:30,644 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 15 predicate places. [2024-06-14 12:07:30,644 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 79 transitions, 449 flow [2024-06-14 12:07:30,644 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.571428571428571) internal successors, (95), 7 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:07:30,644 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:07:30,645 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:07:30,645 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-14 12:07:30,645 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 12:07:30,645 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:07:30,645 INFO L85 PathProgramCache]: Analyzing trace with hash -1330164000, now seen corresponding path program 1 times [2024-06-14 12:07:30,646 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:07:30,646 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1858624808] [2024-06-14 12:07:30,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:07:30,646 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:07:30,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:07:31,747 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:07:31,748 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:07:31,748 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1858624808] [2024-06-14 12:07:31,748 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1858624808] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:07:31,748 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:07:31,748 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 12:07:31,749 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1848866032] [2024-06-14 12:07:31,749 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:07:31,749 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 12:07:31,749 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:07:31,750 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 12:07:31,750 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-14 12:07:31,835 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 53 [2024-06-14 12:07:31,836 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 79 transitions, 449 flow. Second operand has 7 states, 7 states have (on average 13.571428571428571) internal successors, (95), 7 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:07:31,836 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:07:31,836 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 53 [2024-06-14 12:07:31,836 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:07:33,678 INFO L124 PetriNetUnfolderBase]: 11672/16528 cut-off events. [2024-06-14 12:07:33,678 INFO L125 PetriNetUnfolderBase]: For 54502/54514 co-relation queries the response was YES. [2024-06-14 12:07:33,708 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58661 conditions, 16528 events. 11672/16528 cut-off events. For 54502/54514 co-relation queries the response was YES. Maximal size of possible extension queue 576. Compared 92759 event pairs, 6052 based on Foata normal form. 11/16534 useless extension candidates. Maximal degree in co-relation 58636. Up to 15724 conditions per place. [2024-06-14 12:07:33,764 INFO L140 encePairwiseOnDemand]: 42/53 looper letters, 90 selfloop transitions, 21 changer transitions 0/117 dead transitions. [2024-06-14 12:07:33,764 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 117 transitions, 859 flow [2024-06-14 12:07:33,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 12:07:33,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 12:07:33,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 155 transitions. [2024-06-14 12:07:33,766 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48742138364779874 [2024-06-14 12:07:33,766 INFO L175 Difference]: Start difference. First operand has 71 places, 79 transitions, 449 flow. Second operand 6 states and 155 transitions. [2024-06-14 12:07:33,766 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 117 transitions, 859 flow [2024-06-14 12:07:33,784 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 117 transitions, 833 flow, removed 12 selfloop flow, removed 1 redundant places. [2024-06-14 12:07:33,786 INFO L231 Difference]: Finished difference. Result has 76 places, 87 transitions, 560 flow [2024-06-14 12:07:33,787 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=423, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=560, PETRI_PLACES=76, PETRI_TRANSITIONS=87} [2024-06-14 12:07:33,787 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 20 predicate places. [2024-06-14 12:07:33,787 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 87 transitions, 560 flow [2024-06-14 12:07:33,787 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.571428571428571) internal successors, (95), 7 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:07:33,788 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:07:33,788 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:07:33,788 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-14 12:07:33,788 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 12:07:33,788 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:07:33,788 INFO L85 PathProgramCache]: Analyzing trace with hash -579972990, now seen corresponding path program 2 times [2024-06-14 12:07:33,788 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:07:33,788 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1509886235] [2024-06-14 12:07:33,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:07:33,789 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:07:33,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:07:34,831 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:07:34,831 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:07:34,831 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1509886235] [2024-06-14 12:07:34,831 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1509886235] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:07:34,831 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:07:34,831 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 12:07:34,831 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1662017256] [2024-06-14 12:07:34,831 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:07:34,832 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 12:07:34,832 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:07:34,832 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 12:07:34,832 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-14 12:07:34,915 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 53 [2024-06-14 12:07:34,916 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 87 transitions, 560 flow. Second operand has 7 states, 7 states have (on average 13.571428571428571) internal successors, (95), 7 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:07:34,916 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:07:34,916 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 53 [2024-06-14 12:07:34,916 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:07:36,794 INFO L124 PetriNetUnfolderBase]: 11663/16514 cut-off events. [2024-06-14 12:07:36,794 INFO L125 PetriNetUnfolderBase]: For 70199/70199 co-relation queries the response was YES. [2024-06-14 12:07:36,827 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62295 conditions, 16514 events. 11663/16514 cut-off events. For 70199/70199 co-relation queries the response was YES. Maximal size of possible extension queue 576. Compared 92561 event pairs, 6045 based on Foata normal form. 3/16514 useless extension candidates. Maximal degree in co-relation 62267. Up to 15751 conditions per place. [2024-06-14 12:07:36,886 INFO L140 encePairwiseOnDemand]: 42/53 looper letters, 91 selfloop transitions, 14 changer transitions 0/111 dead transitions. [2024-06-14 12:07:36,886 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 111 transitions, 832 flow [2024-06-14 12:07:36,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 12:07:36,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 12:07:36,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 147 transitions. [2024-06-14 12:07:36,887 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46226415094339623 [2024-06-14 12:07:36,887 INFO L175 Difference]: Start difference. First operand has 76 places, 87 transitions, 560 flow. Second operand 6 states and 147 transitions. [2024-06-14 12:07:36,888 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 111 transitions, 832 flow [2024-06-14 12:07:36,929 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 111 transitions, 766 flow, removed 28 selfloop flow, removed 2 redundant places. [2024-06-14 12:07:36,931 INFO L231 Difference]: Finished difference. Result has 80 places, 87 transitions, 533 flow [2024-06-14 12:07:36,931 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=494, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=533, PETRI_PLACES=80, PETRI_TRANSITIONS=87} [2024-06-14 12:07:36,932 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 24 predicate places. [2024-06-14 12:07:36,932 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 87 transitions, 533 flow [2024-06-14 12:07:36,932 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.571428571428571) internal successors, (95), 7 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:07:36,932 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:07:36,932 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:07:36,933 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-14 12:07:36,933 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 12:07:36,933 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:07:36,933 INFO L85 PathProgramCache]: Analyzing trace with hash -999665428, now seen corresponding path program 1 times [2024-06-14 12:07:36,933 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:07:36,934 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [618586103] [2024-06-14 12:07:36,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:07:36,934 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:07:36,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:07:38,185 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:07:38,186 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:07:38,186 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [618586103] [2024-06-14 12:07:38,186 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [618586103] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:07:38,186 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:07:38,187 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:07:38,187 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1453471821] [2024-06-14 12:07:38,187 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:07:38,187 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:07:38,187 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:07:38,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:07:38,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:07:38,324 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 53 [2024-06-14 12:07:38,324 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 87 transitions, 533 flow. Second operand has 8 states, 8 states have (on average 13.5) internal successors, (108), 8 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:07:38,325 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:07:38,325 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 53 [2024-06-14 12:07:38,325 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:07:40,221 INFO L124 PetriNetUnfolderBase]: 11685/16542 cut-off events. [2024-06-14 12:07:40,222 INFO L125 PetriNetUnfolderBase]: For 78150/78150 co-relation queries the response was YES. [2024-06-14 12:07:40,257 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63022 conditions, 16542 events. 11685/16542 cut-off events. For 78150/78150 co-relation queries the response was YES. Maximal size of possible extension queue 576. Compared 92737 event pairs, 5921 based on Foata normal form. 3/16542 useless extension candidates. Maximal degree in co-relation 62992. Up to 15754 conditions per place. [2024-06-14 12:07:40,315 INFO L140 encePairwiseOnDemand]: 41/53 looper letters, 104 selfloop transitions, 18 changer transitions 0/128 dead transitions. [2024-06-14 12:07:40,315 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 128 transitions, 917 flow [2024-06-14 12:07:40,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:07:40,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:07:40,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 176 transitions. [2024-06-14 12:07:40,316 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4743935309973046 [2024-06-14 12:07:40,317 INFO L175 Difference]: Start difference. First operand has 80 places, 87 transitions, 533 flow. Second operand 7 states and 176 transitions. [2024-06-14 12:07:40,317 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 128 transitions, 917 flow [2024-06-14 12:07:40,343 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 128 transitions, 873 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-06-14 12:07:40,345 INFO L231 Difference]: Finished difference. Result has 81 places, 91 transitions, 588 flow [2024-06-14 12:07:40,345 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=489, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=588, PETRI_PLACES=81, PETRI_TRANSITIONS=91} [2024-06-14 12:07:40,346 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 25 predicate places. [2024-06-14 12:07:40,346 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 91 transitions, 588 flow [2024-06-14 12:07:40,346 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.5) internal successors, (108), 8 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:07:40,346 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:07:40,346 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:07:40,346 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-14 12:07:40,346 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 12:07:40,347 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:07:40,347 INFO L85 PathProgramCache]: Analyzing trace with hash -1553773192, now seen corresponding path program 1 times [2024-06-14 12:07:40,347 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:07:40,347 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2056165128] [2024-06-14 12:07:40,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:07:40,347 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:07:40,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:07:41,496 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:07:41,497 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:07:41,497 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2056165128] [2024-06-14 12:07:41,497 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2056165128] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:07:41,497 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:07:41,497 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:07:41,498 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1290779313] [2024-06-14 12:07:41,498 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:07:41,498 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:07:41,498 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:07:41,499 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:07:41,499 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:07:41,668 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 53 [2024-06-14 12:07:41,669 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 91 transitions, 588 flow. Second operand has 8 states, 8 states have (on average 13.5) internal successors, (108), 8 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:07:41,669 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:07:41,669 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 53 [2024-06-14 12:07:41,669 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:07:43,573 INFO L124 PetriNetUnfolderBase]: 12097/17042 cut-off events. [2024-06-14 12:07:43,574 INFO L125 PetriNetUnfolderBase]: For 100741/100747 co-relation queries the response was YES. [2024-06-14 12:07:43,610 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69055 conditions, 17042 events. 12097/17042 cut-off events. For 100741/100747 co-relation queries the response was YES. Maximal size of possible extension queue 569. Compared 94770 event pairs, 5397 based on Foata normal form. 15/17047 useless extension candidates. Maximal degree in co-relation 69025. Up to 15832 conditions per place. [2024-06-14 12:07:43,679 INFO L140 encePairwiseOnDemand]: 38/53 looper letters, 123 selfloop transitions, 37 changer transitions 0/166 dead transitions. [2024-06-14 12:07:43,679 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 166 transitions, 1396 flow [2024-06-14 12:07:43,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:07:43,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:07:43,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 195 transitions. [2024-06-14 12:07:43,681 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5256064690026954 [2024-06-14 12:07:43,681 INFO L175 Difference]: Start difference. First operand has 81 places, 91 transitions, 588 flow. Second operand 7 states and 195 transitions. [2024-06-14 12:07:43,681 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 166 transitions, 1396 flow [2024-06-14 12:07:43,717 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 166 transitions, 1329 flow, removed 18 selfloop flow, removed 5 redundant places. [2024-06-14 12:07:43,719 INFO L231 Difference]: Finished difference. Result has 86 places, 114 transitions, 869 flow [2024-06-14 12:07:43,719 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=521, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=91, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=869, PETRI_PLACES=86, PETRI_TRANSITIONS=114} [2024-06-14 12:07:43,720 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 30 predicate places. [2024-06-14 12:07:43,720 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 114 transitions, 869 flow [2024-06-14 12:07:43,720 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.5) internal successors, (108), 8 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:07:43,720 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:07:43,720 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:07:43,720 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-14 12:07:43,721 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 12:07:43,721 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:07:43,721 INFO L85 PathProgramCache]: Analyzing trace with hash 1885292618, now seen corresponding path program 2 times [2024-06-14 12:07:43,721 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:07:43,721 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1626688367] [2024-06-14 12:07:43,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:07:43,721 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:07:43,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:07:45,004 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:07:45,005 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:07:45,005 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1626688367] [2024-06-14 12:07:45,005 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1626688367] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:07:45,005 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:07:45,005 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:07:45,005 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1691460510] [2024-06-14 12:07:45,005 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:07:45,005 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:07:45,006 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:07:45,006 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:07:45,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:07:45,099 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 53 [2024-06-14 12:07:45,099 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 114 transitions, 869 flow. Second operand has 8 states, 8 states have (on average 13.5) internal successors, (108), 8 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:07:45,100 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:07:45,100 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 53 [2024-06-14 12:07:45,100 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:07:46,945 INFO L124 PetriNetUnfolderBase]: 12119/17120 cut-off events. [2024-06-14 12:07:46,946 INFO L125 PetriNetUnfolderBase]: For 130805/130817 co-relation queries the response was YES. [2024-06-14 12:07:47,038 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77665 conditions, 17120 events. 12119/17120 cut-off events. For 130805/130817 co-relation queries the response was YES. Maximal size of possible extension queue 571. Compared 95732 event pairs, 5653 based on Foata normal form. 11/17126 useless extension candidates. Maximal degree in co-relation 77631. Up to 16250 conditions per place. [2024-06-14 12:07:47,115 INFO L140 encePairwiseOnDemand]: 41/53 looper letters, 118 selfloop transitions, 35 changer transitions 0/159 dead transitions. [2024-06-14 12:07:47,115 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 159 transitions, 1445 flow [2024-06-14 12:07:47,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:07:47,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:07:47,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 180 transitions. [2024-06-14 12:07:47,118 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48517520215633425 [2024-06-14 12:07:47,118 INFO L175 Difference]: Start difference. First operand has 86 places, 114 transitions, 869 flow. Second operand 7 states and 180 transitions. [2024-06-14 12:07:47,118 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 159 transitions, 1445 flow [2024-06-14 12:07:47,192 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 159 transitions, 1389 flow, removed 27 selfloop flow, removed 1 redundant places. [2024-06-14 12:07:47,194 INFO L231 Difference]: Finished difference. Result has 92 places, 122 transitions, 1018 flow [2024-06-14 12:07:47,195 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=813, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=114, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1018, PETRI_PLACES=92, PETRI_TRANSITIONS=122} [2024-06-14 12:07:47,195 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 36 predicate places. [2024-06-14 12:07:47,196 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 122 transitions, 1018 flow [2024-06-14 12:07:47,196 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.5) internal successors, (108), 8 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:07:47,196 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:07:47,196 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:07:47,196 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-14 12:07:47,197 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 12:07:47,197 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:07:47,197 INFO L85 PathProgramCache]: Analyzing trace with hash -799292092, now seen corresponding path program 2 times [2024-06-14 12:07:47,197 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:07:47,197 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1822494743] [2024-06-14 12:07:47,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:07:47,198 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:07:47,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:07:48,331 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:07:48,331 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:07:48,331 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1822494743] [2024-06-14 12:07:48,332 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1822494743] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:07:48,332 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:07:48,332 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:07:48,332 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [511159318] [2024-06-14 12:07:48,332 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:07:48,332 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:07:48,333 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:07:48,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:07:48,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:07:48,470 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 53 [2024-06-14 12:07:48,471 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 122 transitions, 1018 flow. Second operand has 8 states, 8 states have (on average 13.5) internal successors, (108), 8 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:07:48,471 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:07:48,471 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 53 [2024-06-14 12:07:48,471 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:07:50,573 INFO L124 PetriNetUnfolderBase]: 12247/17273 cut-off events. [2024-06-14 12:07:50,573 INFO L125 PetriNetUnfolderBase]: For 158053/158063 co-relation queries the response was YES. [2024-06-14 12:07:50,670 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82052 conditions, 17273 events. 12247/17273 cut-off events. For 158053/158063 co-relation queries the response was YES. Maximal size of possible extension queue 571. Compared 96310 event pairs, 5626 based on Foata normal form. 24/17292 useless extension candidates. Maximal degree in co-relation 82015. Up to 16213 conditions per place. [2024-06-14 12:07:50,755 INFO L140 encePairwiseOnDemand]: 38/53 looper letters, 142 selfloop transitions, 30 changer transitions 0/178 dead transitions. [2024-06-14 12:07:50,755 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 178 transitions, 1784 flow [2024-06-14 12:07:50,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:07:50,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:07:50,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 187 transitions. [2024-06-14 12:07:50,756 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5040431266846361 [2024-06-14 12:07:50,757 INFO L175 Difference]: Start difference. First operand has 92 places, 122 transitions, 1018 flow. Second operand 7 states and 187 transitions. [2024-06-14 12:07:50,757 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 178 transitions, 1784 flow [2024-06-14 12:07:50,899 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 178 transitions, 1708 flow, removed 28 selfloop flow, removed 3 redundant places. [2024-06-14 12:07:50,902 INFO L231 Difference]: Finished difference. Result has 98 places, 133 transitions, 1169 flow [2024-06-14 12:07:50,902 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=942, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=122, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=97, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1169, PETRI_PLACES=98, PETRI_TRANSITIONS=133} [2024-06-14 12:07:50,903 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 42 predicate places. [2024-06-14 12:07:50,903 INFO L495 AbstractCegarLoop]: Abstraction has has 98 places, 133 transitions, 1169 flow [2024-06-14 12:07:50,903 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.5) internal successors, (108), 8 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:07:50,903 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:07:50,903 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:07:50,904 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-14 12:07:50,904 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)] === [2024-06-14 12:07:50,904 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:07:50,904 INFO L85 PathProgramCache]: Analyzing trace with hash 1891959044, now seen corresponding path program 3 times [2024-06-14 12:07:50,904 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:07:50,905 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1804036136] [2024-06-14 12:07:50,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:07:50,905 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:07:50,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:07:51,926 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:07:51,927 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:07:51,927 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1804036136] [2024-06-14 12:07:51,927 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1804036136] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:07:51,927 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:07:51,927 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:07:51,927 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1816995271] [2024-06-14 12:07:51,927 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:07:51,927 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:07:51,928 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:07:51,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:07:51,929 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:07:52,049 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 53 [2024-06-14 12:07:52,049 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 133 transitions, 1169 flow. Second operand has 8 states, 8 states have (on average 13.5) internal successors, (108), 8 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:07:52,049 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:07:52,049 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 53 [2024-06-14 12:07:52,050 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:07:54,218 INFO L124 PetriNetUnfolderBase]: 12313/17366 cut-off events. [2024-06-14 12:07:54,218 INFO L125 PetriNetUnfolderBase]: For 183486/183486 co-relation queries the response was YES. [2024-06-14 12:07:54,282 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85718 conditions, 17366 events. 12313/17366 cut-off events. For 183486/183486 co-relation queries the response was YES. Maximal size of possible extension queue 571. Compared 96994 event pairs, 5640 based on Foata normal form. 14/17375 useless extension candidates. Maximal degree in co-relation 85677. Up to 16483 conditions per place. [2024-06-14 12:07:54,360 INFO L140 encePairwiseOnDemand]: 38/53 looper letters, 146 selfloop transitions, 27 changer transitions 0/179 dead transitions. [2024-06-14 12:07:54,360 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 179 transitions, 1807 flow [2024-06-14 12:07:54,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:07:54,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:07:54,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 181 transitions. [2024-06-14 12:07:54,362 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48787061994609165 [2024-06-14 12:07:54,362 INFO L175 Difference]: Start difference. First operand has 98 places, 133 transitions, 1169 flow. Second operand 7 states and 181 transitions. [2024-06-14 12:07:54,362 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 179 transitions, 1807 flow [2024-06-14 12:07:54,494 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 179 transitions, 1749 flow, removed 20 selfloop flow, removed 2 redundant places. [2024-06-14 12:07:54,496 INFO L231 Difference]: Finished difference. Result has 105 places, 142 transitions, 1309 flow [2024-06-14 12:07:54,496 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1113, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=133, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=108, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1309, PETRI_PLACES=105, PETRI_TRANSITIONS=142} [2024-06-14 12:07:54,497 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 49 predicate places. [2024-06-14 12:07:54,497 INFO L495 AbstractCegarLoop]: Abstraction has has 105 places, 142 transitions, 1309 flow [2024-06-14 12:07:54,497 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.5) internal successors, (108), 8 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:07:54,497 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:07:54,497 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:07:54,498 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-14 12:07:54,498 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 12:07:54,498 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:07:54,498 INFO L85 PathProgramCache]: Analyzing trace with hash 1891721708, now seen corresponding path program 3 times [2024-06-14 12:07:54,498 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:07:54,499 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [999092899] [2024-06-14 12:07:54,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:07:54,499 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:07:54,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:07:55,550 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:07:55,551 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:07:55,551 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [999092899] [2024-06-14 12:07:55,551 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [999092899] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:07:55,551 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:07:55,551 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:07:55,551 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1987389689] [2024-06-14 12:07:55,551 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:07:55,551 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:07:55,552 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:07:55,552 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:07:55,552 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:07:55,669 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 53 [2024-06-14 12:07:55,670 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 142 transitions, 1309 flow. Second operand has 8 states, 8 states have (on average 13.5) internal successors, (108), 8 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:07:55,670 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:07:55,670 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 53 [2024-06-14 12:07:55,670 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:07:57,728 INFO L124 PetriNetUnfolderBase]: 12304/17358 cut-off events. [2024-06-14 12:07:57,729 INFO L125 PetriNetUnfolderBase]: For 204162/204162 co-relation queries the response was YES. [2024-06-14 12:07:57,824 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87912 conditions, 17358 events. 12304/17358 cut-off events. For 204162/204162 co-relation queries the response was YES. Maximal size of possible extension queue 571. Compared 97025 event pairs, 5670 based on Foata normal form. 3/17358 useless extension candidates. Maximal degree in co-relation 87867. Up to 16588 conditions per place. [2024-06-14 12:07:57,905 INFO L140 encePairwiseOnDemand]: 41/53 looper letters, 149 selfloop transitions, 18 changer transitions 0/173 dead transitions. [2024-06-14 12:07:57,906 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 173 transitions, 1723 flow [2024-06-14 12:07:57,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:07:57,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:07:57,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 170 transitions. [2024-06-14 12:07:57,907 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4582210242587601 [2024-06-14 12:07:57,907 INFO L175 Difference]: Start difference. First operand has 105 places, 142 transitions, 1309 flow. Second operand 7 states and 170 transitions. [2024-06-14 12:07:57,907 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 173 transitions, 1723 flow [2024-06-14 12:07:58,049 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 173 transitions, 1613 flow, removed 34 selfloop flow, removed 4 redundant places. [2024-06-14 12:07:58,051 INFO L231 Difference]: Finished difference. Result has 108 places, 142 transitions, 1246 flow [2024-06-14 12:07:58,051 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1199, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=142, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=124, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1246, PETRI_PLACES=108, PETRI_TRANSITIONS=142} [2024-06-14 12:07:58,052 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 52 predicate places. [2024-06-14 12:07:58,052 INFO L495 AbstractCegarLoop]: Abstraction has has 108 places, 142 transitions, 1246 flow [2024-06-14 12:07:58,052 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.5) internal successors, (108), 8 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:07:58,052 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:07:58,052 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:07:58,052 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-14 12:07:58,052 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 12:07:58,053 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:07:58,053 INFO L85 PathProgramCache]: Analyzing trace with hash 1891967972, now seen corresponding path program 1 times [2024-06-14 12:07:58,053 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:07:58,053 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [325113420] [2024-06-14 12:07:58,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:07:58,053 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:07:58,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:07:59,492 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:07:59,493 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:07:59,493 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [325113420] [2024-06-14 12:07:59,493 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [325113420] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:07:59,493 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:07:59,493 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:07:59,493 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [918669589] [2024-06-14 12:07:59,493 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:07:59,493 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:07:59,494 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:07:59,494 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:07:59,494 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:07:59,665 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 53 [2024-06-14 12:07:59,665 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 142 transitions, 1246 flow. Second operand has 9 states, 9 states have (on average 13.444444444444445) internal successors, (121), 9 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:07:59,666 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:07:59,666 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 53 [2024-06-14 12:07:59,666 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:08:02,107 INFO L124 PetriNetUnfolderBase]: 12485/17606 cut-off events. [2024-06-14 12:08:02,107 INFO L125 PetriNetUnfolderBase]: For 222888/222888 co-relation queries the response was YES. [2024-06-14 12:08:02,202 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89806 conditions, 17606 events. 12485/17606 cut-off events. For 222888/222888 co-relation queries the response was YES. Maximal size of possible extension queue 572. Compared 98520 event pairs, 5508 based on Foata normal form. 30/17630 useless extension candidates. Maximal degree in co-relation 89760. Up to 16447 conditions per place. [2024-06-14 12:08:02,281 INFO L140 encePairwiseOnDemand]: 41/53 looper letters, 150 selfloop transitions, 34 changer transitions 0/190 dead transitions. [2024-06-14 12:08:02,282 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 114 places, 190 transitions, 1910 flow [2024-06-14 12:08:02,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:08:02,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:08:02,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 188 transitions. [2024-06-14 12:08:02,283 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5067385444743935 [2024-06-14 12:08:02,283 INFO L175 Difference]: Start difference. First operand has 108 places, 142 transitions, 1246 flow. Second operand 7 states and 188 transitions. [2024-06-14 12:08:02,283 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 114 places, 190 transitions, 1910 flow [2024-06-14 12:08:02,435 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 190 transitions, 1849 flow, removed 7 selfloop flow, removed 6 redundant places. [2024-06-14 12:08:02,437 INFO L231 Difference]: Finished difference. Result has 109 places, 145 transitions, 1326 flow [2024-06-14 12:08:02,437 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1185, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=142, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=108, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1326, PETRI_PLACES=109, PETRI_TRANSITIONS=145} [2024-06-14 12:08:02,438 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 53 predicate places. [2024-06-14 12:08:02,438 INFO L495 AbstractCegarLoop]: Abstraction has has 109 places, 145 transitions, 1326 flow [2024-06-14 12:08:02,439 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.444444444444445) internal successors, (121), 9 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:08:02,439 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:08:02,439 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:08:02,439 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-14 12:08:02,439 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 12:08:02,439 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:08:02,440 INFO L85 PathProgramCache]: Analyzing trace with hash 1050763014, now seen corresponding path program 1 times [2024-06-14 12:08:02,440 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:08:02,440 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [640283282] [2024-06-14 12:08:02,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:08:02,440 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:08:02,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:08:03,264 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:08:03,264 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:08:03,265 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [640283282] [2024-06-14 12:08:03,265 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [640283282] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:08:03,265 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:08:03,265 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 12:08:03,265 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1670029448] [2024-06-14 12:08:03,265 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:08:03,266 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 12:08:03,266 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:08:03,266 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 12:08:03,266 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-14 12:08:03,344 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 53 [2024-06-14 12:08:03,344 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 145 transitions, 1326 flow. Second operand has 6 states, 6 states have (on average 15.166666666666666) internal successors, (91), 6 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:08:03,344 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:08:03,344 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 53 [2024-06-14 12:08:03,344 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:08:05,523 INFO L124 PetriNetUnfolderBase]: 11810/16633 cut-off events. [2024-06-14 12:08:05,524 INFO L125 PetriNetUnfolderBase]: For 256290/256303 co-relation queries the response was YES. [2024-06-14 12:08:05,585 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89584 conditions, 16633 events. 11810/16633 cut-off events. For 256290/256303 co-relation queries the response was YES. Maximal size of possible extension queue 560. Compared 94753 event pairs, 7126 based on Foata normal form. 14/16584 useless extension candidates. Maximal degree in co-relation 89537. Up to 15945 conditions per place. [2024-06-14 12:08:05,654 INFO L140 encePairwiseOnDemand]: 43/53 looper letters, 129 selfloop transitions, 15 changer transitions 0/160 dead transitions. [2024-06-14 12:08:05,654 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 114 places, 160 transitions, 1667 flow [2024-06-14 12:08:05,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 12:08:05,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 12:08:05,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 139 transitions. [2024-06-14 12:08:05,655 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4371069182389937 [2024-06-14 12:08:05,655 INFO L175 Difference]: Start difference. First operand has 109 places, 145 transitions, 1326 flow. Second operand 6 states and 139 transitions. [2024-06-14 12:08:05,655 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 114 places, 160 transitions, 1667 flow [2024-06-14 12:08:05,813 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 160 transitions, 1526 flow, removed 38 selfloop flow, removed 5 redundant places. [2024-06-14 12:08:05,815 INFO L231 Difference]: Finished difference. Result has 111 places, 147 transitions, 1251 flow [2024-06-14 12:08:05,815 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1187, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=145, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=131, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1251, PETRI_PLACES=111, PETRI_TRANSITIONS=147} [2024-06-14 12:08:05,815 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 55 predicate places. [2024-06-14 12:08:05,815 INFO L495 AbstractCegarLoop]: Abstraction has has 111 places, 147 transitions, 1251 flow [2024-06-14 12:08:05,816 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.166666666666666) internal successors, (91), 6 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:08:05,816 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:08:05,816 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:08:05,816 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-14 12:08:05,816 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 12:08:05,817 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:08:05,817 INFO L85 PathProgramCache]: Analyzing trace with hash -810636059, now seen corresponding path program 1 times [2024-06-14 12:08:05,817 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:08:05,817 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1468965220] [2024-06-14 12:08:05,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:08:05,818 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:08:05,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:08:06,708 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:08:06,708 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:08:06,708 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1468965220] [2024-06-14 12:08:06,708 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1468965220] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:08:06,708 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:08:06,709 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:08:06,709 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [670854339] [2024-06-14 12:08:06,709 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:08:06,709 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:08:06,709 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:08:06,710 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:08:06,710 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:08:06,836 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 53 [2024-06-14 12:08:06,837 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 147 transitions, 1251 flow. Second operand has 8 states, 8 states have (on average 13.625) internal successors, (109), 8 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:08:06,837 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:08:06,837 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 53 [2024-06-14 12:08:06,837 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:08:09,385 INFO L124 PetriNetUnfolderBase]: 12635/17820 cut-off events. [2024-06-14 12:08:09,385 INFO L125 PetriNetUnfolderBase]: For 266895/266901 co-relation queries the response was YES. [2024-06-14 12:08:09,437 INFO L83 FinitePrefix]: Finished finitePrefix Result has 94609 conditions, 17820 events. 12635/17820 cut-off events. For 266895/266901 co-relation queries the response was YES. Maximal size of possible extension queue 570. Compared 99543 event pairs, 5527 based on Foata normal form. 9/17826 useless extension candidates. Maximal degree in co-relation 94560. Up to 16912 conditions per place. [2024-06-14 12:08:09,510 INFO L140 encePairwiseOnDemand]: 38/53 looper letters, 179 selfloop transitions, 51 changer transitions 0/236 dead transitions. [2024-06-14 12:08:09,510 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 236 transitions, 2328 flow [2024-06-14 12:08:09,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 12:08:09,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 12:08:09,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 254 transitions. [2024-06-14 12:08:09,511 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47924528301886793 [2024-06-14 12:08:09,511 INFO L175 Difference]: Start difference. First operand has 111 places, 147 transitions, 1251 flow. Second operand 10 states and 254 transitions. [2024-06-14 12:08:09,511 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 236 transitions, 2328 flow [2024-06-14 12:08:09,667 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 236 transitions, 2284 flow, removed 6 selfloop flow, removed 4 redundant places. [2024-06-14 12:08:09,669 INFO L231 Difference]: Finished difference. Result has 119 places, 177 transitions, 1656 flow [2024-06-14 12:08:09,669 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1207, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=147, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=119, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1656, PETRI_PLACES=119, PETRI_TRANSITIONS=177} [2024-06-14 12:08:09,670 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 63 predicate places. [2024-06-14 12:08:09,670 INFO L495 AbstractCegarLoop]: Abstraction has has 119 places, 177 transitions, 1656 flow [2024-06-14 12:08:09,670 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.625) internal successors, (109), 8 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:08:09,670 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:08:09,670 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:08:09,670 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-14 12:08:09,670 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 12:08:09,671 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:08:09,671 INFO L85 PathProgramCache]: Analyzing trace with hash -871996439, now seen corresponding path program 2 times [2024-06-14 12:08:09,671 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:08:09,671 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [650503276] [2024-06-14 12:08:09,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:08:09,671 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:08:09,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:08:10,882 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:08:10,882 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:08:10,882 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [650503276] [2024-06-14 12:08:10,882 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [650503276] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:08:10,882 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:08:10,882 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:08:10,882 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [914095124] [2024-06-14 12:08:10,882 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:08:10,883 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:08:10,883 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:08:10,883 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:08:10,883 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:08:10,998 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 53 [2024-06-14 12:08:10,998 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 177 transitions, 1656 flow. Second operand has 9 states, 9 states have (on average 13.444444444444445) internal successors, (121), 9 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:08:10,998 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:08:10,998 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 53 [2024-06-14 12:08:10,998 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:08:13,755 INFO L124 PetriNetUnfolderBase]: 12856/17914 cut-off events. [2024-06-14 12:08:13,756 INFO L125 PetriNetUnfolderBase]: For 319334/319342 co-relation queries the response was YES. [2024-06-14 12:08:13,815 INFO L83 FinitePrefix]: Finished finitePrefix Result has 100808 conditions, 17914 events. 12856/17914 cut-off events. For 319334/319342 co-relation queries the response was YES. Maximal size of possible extension queue 569. Compared 98727 event pairs, 6388 based on Foata normal form. 13/17878 useless extension candidates. Maximal degree in co-relation 100757. Up to 17207 conditions per place. [2024-06-14 12:08:13,900 INFO L140 encePairwiseOnDemand]: 37/53 looper letters, 212 selfloop transitions, 65 changer transitions 0/283 dead transitions. [2024-06-14 12:08:13,900 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 283 transitions, 2940 flow [2024-06-14 12:08:13,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 12:08:13,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 12:08:13,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 247 transitions. [2024-06-14 12:08:13,902 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4660377358490566 [2024-06-14 12:08:13,902 INFO L175 Difference]: Start difference. First operand has 119 places, 177 transitions, 1656 flow. Second operand 10 states and 247 transitions. [2024-06-14 12:08:13,902 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 283 transitions, 2940 flow [2024-06-14 12:08:14,233 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 283 transitions, 2750 flow, removed 86 selfloop flow, removed 3 redundant places. [2024-06-14 12:08:14,237 INFO L231 Difference]: Finished difference. Result has 130 places, 225 transitions, 2261 flow [2024-06-14 12:08:14,237 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1556, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=177, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=123, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2261, PETRI_PLACES=130, PETRI_TRANSITIONS=225} [2024-06-14 12:08:14,237 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 74 predicate places. [2024-06-14 12:08:14,237 INFO L495 AbstractCegarLoop]: Abstraction has has 130 places, 225 transitions, 2261 flow [2024-06-14 12:08:14,237 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.444444444444445) internal successors, (121), 9 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:08:14,238 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:08:14,238 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:08:14,238 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-14 12:08:14,238 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)] === [2024-06-14 12:08:14,238 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:08:14,238 INFO L85 PathProgramCache]: Analyzing trace with hash -1023852702, now seen corresponding path program 1 times [2024-06-14 12:08:14,238 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:08:14,238 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [811527003] [2024-06-14 12:08:14,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:08:14,238 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:08:14,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:08:15,259 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:08:15,259 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:08:15,259 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [811527003] [2024-06-14 12:08:15,259 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [811527003] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:08:15,259 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:08:15,259 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:08:15,259 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [280093353] [2024-06-14 12:08:15,260 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:08:15,260 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:08:15,260 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:08:15,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:08:15,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:08:15,394 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 53 [2024-06-14 12:08:15,395 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 130 places, 225 transitions, 2261 flow. Second operand has 9 states, 9 states have (on average 13.444444444444445) internal successors, (121), 9 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:08:15,395 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:08:15,395 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 53 [2024-06-14 12:08:15,395 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:08:18,561 INFO L124 PetriNetUnfolderBase]: 13433/18648 cut-off events. [2024-06-14 12:08:18,562 INFO L125 PetriNetUnfolderBase]: For 358886/358890 co-relation queries the response was YES. [2024-06-14 12:08:18,675 INFO L83 FinitePrefix]: Finished finitePrefix Result has 107705 conditions, 18648 events. 13433/18648 cut-off events. For 358886/358890 co-relation queries the response was YES. Maximal size of possible extension queue 570. Compared 103030 event pairs, 6377 based on Foata normal form. 18/18596 useless extension candidates. Maximal degree in co-relation 107648. Up to 17518 conditions per place. [2024-06-14 12:08:18,768 INFO L140 encePairwiseOnDemand]: 34/53 looper letters, 260 selfloop transitions, 82 changer transitions 0/348 dead transitions. [2024-06-14 12:08:18,769 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 140 places, 348 transitions, 4253 flow [2024-06-14 12:08:18,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 12:08:18,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 12:08:18,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 298 transitions. [2024-06-14 12:08:18,771 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5111492281303602 [2024-06-14 12:08:18,771 INFO L175 Difference]: Start difference. First operand has 130 places, 225 transitions, 2261 flow. Second operand 11 states and 298 transitions. [2024-06-14 12:08:18,771 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 140 places, 348 transitions, 4253 flow [2024-06-14 12:08:19,238 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 137 places, 348 transitions, 4082 flow, removed 57 selfloop flow, removed 3 redundant places. [2024-06-14 12:08:19,243 INFO L231 Difference]: Finished difference. Result has 142 places, 267 transitions, 2844 flow [2024-06-14 12:08:19,243 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=2090, PETRI_DIFFERENCE_MINUEND_PLACES=127, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=225, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=167, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2844, PETRI_PLACES=142, PETRI_TRANSITIONS=267} [2024-06-14 12:08:19,243 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 86 predicate places. [2024-06-14 12:08:19,244 INFO L495 AbstractCegarLoop]: Abstraction has has 142 places, 267 transitions, 2844 flow [2024-06-14 12:08:19,244 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.444444444444445) internal successors, (121), 9 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:08:19,244 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:08:19,244 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:08:19,244 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-14 12:08:19,244 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 12:08:19,245 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:08:19,245 INFO L85 PathProgramCache]: Analyzing trace with hash -1595913864, now seen corresponding path program 2 times [2024-06-14 12:08:19,245 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:08:19,245 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [502546297] [2024-06-14 12:08:19,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:08:19,245 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:08:19,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:08:20,222 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:08:20,222 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:08:20,223 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [502546297] [2024-06-14 12:08:20,223 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [502546297] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:08:20,223 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:08:20,223 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:08:20,223 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1467536887] [2024-06-14 12:08:20,223 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:08:20,223 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:08:20,224 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:08:20,224 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:08:20,224 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:08:20,402 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 53 [2024-06-14 12:08:20,402 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 142 places, 267 transitions, 2844 flow. Second operand has 9 states, 9 states have (on average 13.444444444444445) internal successors, (121), 9 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:08:20,402 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:08:20,402 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 53 [2024-06-14 12:08:20,402 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:08:24,299 INFO L124 PetriNetUnfolderBase]: 14353/19928 cut-off events. [2024-06-14 12:08:24,300 INFO L125 PetriNetUnfolderBase]: For 447390/447400 co-relation queries the response was YES. [2024-06-14 12:08:24,388 INFO L83 FinitePrefix]: Finished finitePrefix Result has 127659 conditions, 19928 events. 14353/19928 cut-off events. For 447390/447400 co-relation queries the response was YES. Maximal size of possible extension queue 586. Compared 110969 event pairs, 6389 based on Foata normal form. 30/19900 useless extension candidates. Maximal degree in co-relation 127597. Up to 18571 conditions per place. [2024-06-14 12:08:24,482 INFO L140 encePairwiseOnDemand]: 35/53 looper letters, 277 selfloop transitions, 105 changer transitions 0/388 dead transitions. [2024-06-14 12:08:24,482 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 150 places, 388 transitions, 5102 flow [2024-06-14 12:08:24,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:08:24,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:08:24,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 244 transitions. [2024-06-14 12:08:24,484 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5115303983228512 [2024-06-14 12:08:24,484 INFO L175 Difference]: Start difference. First operand has 142 places, 267 transitions, 2844 flow. Second operand 9 states and 244 transitions. [2024-06-14 12:08:24,484 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 150 places, 388 transitions, 5102 flow [2024-06-14 12:08:24,908 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 148 places, 388 transitions, 4767 flow, removed 162 selfloop flow, removed 2 redundant places. [2024-06-14 12:08:24,912 INFO L231 Difference]: Finished difference. Result has 153 places, 321 transitions, 3781 flow [2024-06-14 12:08:24,913 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=2683, PETRI_DIFFERENCE_MINUEND_PLACES=140, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=267, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=184, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3781, PETRI_PLACES=153, PETRI_TRANSITIONS=321} [2024-06-14 12:08:24,913 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 97 predicate places. [2024-06-14 12:08:24,913 INFO L495 AbstractCegarLoop]: Abstraction has has 153 places, 321 transitions, 3781 flow [2024-06-14 12:08:24,913 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.444444444444445) internal successors, (121), 9 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:08:24,913 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:08:24,913 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:08:24,914 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-14 12:08:24,914 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 12:08:24,914 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:08:24,914 INFO L85 PathProgramCache]: Analyzing trace with hash 1870835592, now seen corresponding path program 3 times [2024-06-14 12:08:24,914 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:08:24,914 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [61966653] [2024-06-14 12:08:24,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:08:24,915 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:08:24,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:08:25,978 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:08:25,979 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:08:25,979 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [61966653] [2024-06-14 12:08:25,979 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [61966653] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:08:25,979 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:08:25,979 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:08:25,980 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2015924890] [2024-06-14 12:08:25,980 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:08:25,980 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:08:25,980 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:08:25,981 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:08:25,981 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:08:26,125 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 53 [2024-06-14 12:08:26,126 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 153 places, 321 transitions, 3781 flow. Second operand has 9 states, 9 states have (on average 13.444444444444445) internal successors, (121), 9 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:08:26,126 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:08:26,127 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 53 [2024-06-14 12:08:26,127 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:08:30,424 INFO L124 PetriNetUnfolderBase]: 15935/22016 cut-off events. [2024-06-14 12:08:30,425 INFO L125 PetriNetUnfolderBase]: For 543128/543188 co-relation queries the response was YES. [2024-06-14 12:08:30,518 INFO L83 FinitePrefix]: Finished finitePrefix Result has 148287 conditions, 22016 events. 15935/22016 cut-off events. For 543128/543188 co-relation queries the response was YES. Maximal size of possible extension queue 671. Compared 122820 event pairs, 6241 based on Foata normal form. 26/21970 useless extension candidates. Maximal degree in co-relation 148219. Up to 18523 conditions per place. [2024-06-14 12:08:30,616 INFO L140 encePairwiseOnDemand]: 34/53 looper letters, 286 selfloop transitions, 206 changer transitions 0/498 dead transitions. [2024-06-14 12:08:30,617 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 161 places, 498 transitions, 6759 flow [2024-06-14 12:08:30,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:08:30,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:08:30,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 257 transitions. [2024-06-14 12:08:30,619 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5387840670859538 [2024-06-14 12:08:30,619 INFO L175 Difference]: Start difference. First operand has 153 places, 321 transitions, 3781 flow. Second operand 9 states and 257 transitions. [2024-06-14 12:08:30,619 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 161 places, 498 transitions, 6759 flow [2024-06-14 12:08:31,258 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 159 places, 498 transitions, 6580 flow, removed 84 selfloop flow, removed 2 redundant places. [2024-06-14 12:08:31,265 INFO L231 Difference]: Finished difference. Result has 164 places, 392 transitions, 5140 flow [2024-06-14 12:08:31,265 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=3602, PETRI_DIFFERENCE_MINUEND_PLACES=151, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=321, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=148, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=150, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5140, PETRI_PLACES=164, PETRI_TRANSITIONS=392} [2024-06-14 12:08:31,266 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 108 predicate places. [2024-06-14 12:08:31,266 INFO L495 AbstractCegarLoop]: Abstraction has has 164 places, 392 transitions, 5140 flow [2024-06-14 12:08:31,266 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.444444444444445) internal successors, (121), 9 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:08:31,266 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:08:31,266 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:08:31,267 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-14 12:08:31,267 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 12:08:31,267 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:08:31,267 INFO L85 PathProgramCache]: Analyzing trace with hash -871848414, now seen corresponding path program 4 times [2024-06-14 12:08:31,267 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:08:31,268 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [387288937] [2024-06-14 12:08:31,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:08:31,268 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:08:31,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:08:32,568 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:08:32,568 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:08:32,568 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [387288937] [2024-06-14 12:08:32,568 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [387288937] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:08:32,569 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:08:32,569 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:08:32,569 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2072728591] [2024-06-14 12:08:32,569 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:08:32,569 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:08:32,570 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:08:32,570 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:08:32,570 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:08:32,672 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 53 [2024-06-14 12:08:32,672 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 164 places, 392 transitions, 5140 flow. Second operand has 9 states, 9 states have (on average 13.444444444444445) internal successors, (121), 9 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:08:32,672 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:08:32,672 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 53 [2024-06-14 12:08:32,672 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:08:37,369 INFO L124 PetriNetUnfolderBase]: 15909/21988 cut-off events. [2024-06-14 12:08:37,369 INFO L125 PetriNetUnfolderBase]: For 625334/625434 co-relation queries the response was YES. [2024-06-14 12:08:37,491 INFO L83 FinitePrefix]: Finished finitePrefix Result has 160839 conditions, 21988 events. 15909/21988 cut-off events. For 625334/625434 co-relation queries the response was YES. Maximal size of possible extension queue 670. Compared 123066 event pairs, 6383 based on Foata normal form. 46/21962 useless extension candidates. Maximal degree in co-relation 160765. Up to 18512 conditions per place. [2024-06-14 12:08:37,757 INFO L140 encePairwiseOnDemand]: 34/53 looper letters, 294 selfloop transitions, 194 changer transitions 0/494 dead transitions. [2024-06-14 12:08:37,757 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 172 places, 494 transitions, 7329 flow [2024-06-14 12:08:37,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:08:37,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:08:37,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 256 transitions. [2024-06-14 12:08:37,758 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5366876310272537 [2024-06-14 12:08:37,758 INFO L175 Difference]: Start difference. First operand has 164 places, 392 transitions, 5140 flow. Second operand 9 states and 256 transitions. [2024-06-14 12:08:37,758 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 172 places, 494 transitions, 7329 flow [2024-06-14 12:08:38,569 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 170 places, 494 transitions, 7124 flow, removed 93 selfloop flow, removed 2 redundant places. [2024-06-14 12:08:38,575 INFO L231 Difference]: Finished difference. Result has 172 places, 394 transitions, 5429 flow [2024-06-14 12:08:38,576 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=4943, PETRI_DIFFERENCE_MINUEND_PLACES=162, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=392, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=192, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=198, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5429, PETRI_PLACES=172, PETRI_TRANSITIONS=394} [2024-06-14 12:08:38,576 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 116 predicate places. [2024-06-14 12:08:38,576 INFO L495 AbstractCegarLoop]: Abstraction has has 172 places, 394 transitions, 5429 flow [2024-06-14 12:08:38,576 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.444444444444445) internal successors, (121), 9 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:08:38,577 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:08:38,577 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:08:38,577 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-14 12:08:38,577 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 12:08:38,577 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:08:38,578 INFO L85 PathProgramCache]: Analyzing trace with hash -871848569, now seen corresponding path program 3 times [2024-06-14 12:08:38,578 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:08:38,578 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [376885460] [2024-06-14 12:08:38,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:08:38,578 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:08:38,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:08:39,780 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:08:39,781 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:08:39,781 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [376885460] [2024-06-14 12:08:39,781 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [376885460] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:08:39,781 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:08:39,781 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:08:39,781 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [946541747] [2024-06-14 12:08:39,781 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:08:39,782 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:08:39,782 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:08:39,782 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:08:39,782 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:08:39,920 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 53 [2024-06-14 12:08:39,920 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 172 places, 394 transitions, 5429 flow. Second operand has 9 states, 9 states have (on average 13.444444444444445) internal successors, (121), 9 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:08:39,920 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:08:39,920 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 53 [2024-06-14 12:08:39,920 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:08:44,314 INFO L124 PetriNetUnfolderBase]: 15931/22107 cut-off events. [2024-06-14 12:08:44,314 INFO L125 PetriNetUnfolderBase]: For 628026/628049 co-relation queries the response was YES. [2024-06-14 12:08:44,432 INFO L83 FinitePrefix]: Finished finitePrefix Result has 160995 conditions, 22107 events. 15931/22107 cut-off events. For 628026/628049 co-relation queries the response was YES. Maximal size of possible extension queue 669. Compared 124562 event pairs, 6683 based on Foata normal form. 21/22072 useless extension candidates. Maximal degree in co-relation 160918. Up to 21159 conditions per place. [2024-06-14 12:08:44,546 INFO L140 encePairwiseOnDemand]: 37/53 looper letters, 347 selfloop transitions, 104 changer transitions 0/457 dead transitions. [2024-06-14 12:08:44,546 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 180 places, 457 transitions, 6793 flow [2024-06-14 12:08:44,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:08:44,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:08:44,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 226 transitions. [2024-06-14 12:08:44,547 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47379454926624737 [2024-06-14 12:08:44,547 INFO L175 Difference]: Start difference. First operand has 172 places, 394 transitions, 5429 flow. Second operand 9 states and 226 transitions. [2024-06-14 12:08:44,547 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 180 places, 457 transitions, 6793 flow [2024-06-14 12:08:45,294 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 176 places, 457 transitions, 6502 flow, removed 32 selfloop flow, removed 4 redundant places. [2024-06-14 12:08:45,299 INFO L231 Difference]: Finished difference. Result has 178 places, 410 transitions, 5602 flow [2024-06-14 12:08:45,299 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=5140, PETRI_DIFFERENCE_MINUEND_PLACES=168, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=394, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=300, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5602, PETRI_PLACES=178, PETRI_TRANSITIONS=410} [2024-06-14 12:08:45,300 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 122 predicate places. [2024-06-14 12:08:45,300 INFO L495 AbstractCegarLoop]: Abstraction has has 178 places, 410 transitions, 5602 flow [2024-06-14 12:08:45,300 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.444444444444445) internal successors, (121), 9 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:08:45,300 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:08:45,300 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:08:45,300 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-14 12:08:45,300 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 5 more)] === [2024-06-14 12:08:45,301 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:08:45,301 INFO L85 PathProgramCache]: Analyzing trace with hash 1608880255, now seen corresponding path program 4 times [2024-06-14 12:08:45,301 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:08:45,301 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2095218189] [2024-06-14 12:08:45,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:08:45,301 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:08:45,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat